A blown film device for rapid cooling of PE film forming

Abstract

The present application discloses a blown film device for rapid cooling in PE film forming, which belongs to the field of PE film forming. Platform; Blown film machine body; Roller assembly; Among them, the blown film machine body has an air ring for discharging materials; The blown film device for rapid cooling of PE film forming further includes: a plurality of nozzles arranged on the surface of the air ring, spraying cooling air for cooling the PE film; An air compressor having an air outlet pipe connected to the nozzles; A cooling part formed inside the air ring, communicating with both the nozzles and the air outlet pipe, and filled with a coolant inside; Among them, a cooling pipe is arranged inside the cooling part, and this cooling pipe is connected to an external gas storage tank, and a refrigerant is stored in this gas storage tank; An electronic thermometer for detecting the temperature of the cooling air is also arranged inside the air ring, and this electronic thermometer is electrically connected to an electromagnetic valve arranged on the gas storage tank. The beneficial effect of the present application lies in providing a blown film device for rapid cooling of PE film forming with a temperature control effect.

Description

Technical Field

[0001] This application relates to the field of PE film forming, and more specifically, to a film blowing device for rapid cooling in PE film forming. Background Art

[0002] The PE protective film, whose full name is Polyethylene, is the simplest macromolecular organic compound and the most widely used macromolecular material in the world today. The PE protective film is based on a special polyethylene (PE) plastic film as the substrate and is divided into high-density polyethylene protective film, medium-density polyethylene, and low-density polyethylene according to different densities;

[0003] In actual production, after the PE film is formed, it is cooled by air through an air ring; however, the existing cooling methods are all to cool the PE film by blowing normal-temperature gas; therefore, the temperature of the cooling air depends on the room temperature; as a result, the cooling effect of the PE film is always unstable;

[0004] Therefore, it is necessary to design a film blowing device for rapid cooling of PE film forming that can automatically adjust the air cooling temperature. Summary of the Invention

[0005] This part of the content of this application is used to introduce the concepts in a brief form, and these concepts will be described in detail in the following detailed implementation part. This part of the content of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0006] To solve the technical problems mentioned in the above background art part, some embodiments of this application provide a film blowing device for rapid cooling in PE film forming. The platform is supported by multiple legs at the bottom

[0007] The film blowing machine body is placed on the ground and is located below the platform;

[0008] The roller assembly is arranged on the platform and is located directly above the film blowing machine body;

[0009] Among them, the film blowing machine body has an air ring for discharging materials;

[0010] The film blowing device for rapid cooling in PE film forming further includes:

[0011] A number of nozzles are arranged on the surface of the air ring and spray cooling air for cooling the PE film;

[0012] The air compressor has an air outlet pipe connected to the nozzle;

[0013] The cooling part is formed inside the air ring, is connected to both the nozzle and the air outlet pipe, and is filled with a coolant inside;

[0014] Among them, a cooling pipe is arranged inside the cooling part. The cooling pipe is communicated with an external gas storage tank, and a refrigerant is stored in the gas storage tank. An electronic thermometer for detecting the temperature of the cooling air is also arranged inside the air ring. The electronic thermometer is electrically connected to an electromagnetic valve arranged on the gas storage tank.

[0015] During the working process, the air compressor can generate cooling air for air-cooling the just-formed PE film, enabling the PE film to cool down quickly, thereby improving the tensile property of the PE film. Through the arranged cooling part, the cooling air can be cooled under the action of the internal coolant. Since the temperature of the cooling air decreases, the temperature of the PE film can also be quickly reduced. Through the arranged electronic thermometer, the temperature of the cooling air can be monitored in real time, and the coolant in the gas storage tank can be used to keep the coolant warm to prevent the temperature of the coolant from being too high and causing the temperature of the cooling air to be unstable.

[0016] In some embodiments, an information processor electrically connected to the electronic thermometer is also arranged on the air ring;

[0017] The information processor is electrically connected to a controller, and the controller is used to control the opening and closing of the electromagnetic valve.

[0018] Through the above scheme, it is realized that the temperature can be detected by the electronic thermometer, and then the information can be directly analyzed by the information processor, and the electromagnetic valve is controlled to open and close according to the temperature of the cooling air; automatic control of the cooling temperature is realized.

[0019] In some embodiments, a rotating ring for supporting the nozzle is rotatably arranged on the surface of the air ring;

[0020] A ring groove corresponding to the rotating ring is formed by partial concave of the surface of the air ring;

[0021] The ring groove is communicated with the cooling part.

[0022] Through the setting of the above scheme, the rotation of the rotating ring driving the nozzle is realized, making the cooling of the PE film more uniform.

[0023] In some embodiments, louvers are annularly arranged along the circumferential direction of the rotating ring on the surface of the rotating ring located in the ring groove;

[0024] There is a distance between the louvers and the nozzle;

[0025] An air outlet communicated with the refrigeration part is formed at the bottom of the ring groove;

[0026] Among them, the air outlet forms a spraying path β for guiding the cooling air to blow towards the louvers, and the spraying path β forms an angle α with the surface of the louvers;

[0027] The value of the angle α is 45° - 90°.

[0028] Through the setting of the above solution, it is realized that the rotating ring can be driven to rotate by the cooling air ejected from the air outlet, eliminating the need for an additional driving force to rotate the rotating ring in the traditional process.

[0029] In some embodiments, the cooling part includes a housing fixedly arranged on the air ring and a partition board arranged in the inner space of the housing;

[0030] The partition board divides the inner space of the housing into a refrigeration layer and an inflation layer;

[0031] Among them, the refrigeration layer is close to the nozzle.

[0032] Through the setting of the above solution, the refrigeration layer can cool the cooling air; the inflation layer can disperse the air before it enters the refrigeration layer, so that the cooling air can be evenly cooled.

[0033] In some embodiments, the inner top wall of the refrigeration layer penetrates through the annular groove to form a connection hole communicating with the air outlet hole;

[0034] The connection hole is in a flared shape, and the end with a small diameter communicates with the air outlet hole;

[0035] A water baffle is arranged at the end with a large diameter of the connection hole; a leakage groove is opened on the water baffle.

[0036] Through the setting of the above solution, on the one hand, the compression flow rate of the cooling air passing through the connection hole becomes faster; on the other hand, the water baffle can prevent the splashing of water.

[0037] In some embodiments, the top of the refrigeration layer is arc-shaped.

[0038] In some embodiments, a plurality of one-way valves communicating the refrigeration layer and the inflation layer are arranged on the surface of the partition board;

[0039] The one-way valve only allows the gas in the inflation layer to enter the refrigeration layer.

[0040] Through the setting of the above solution, it is realized that the coolant does not flow back to the inflation layer.

[0041] In some embodiments, the cooling pipe is laid in the refrigeration layer;

[0042] The cooling pipe is laid in a circular shape along the circumference of the refrigeration layer;

[0043] Among them, a pressure relief valve is arranged on the surface of the cooling pipe.

[0044] Through the setting of the above solution, the refrigerant in the cooling pipe can cool the coolant.

[0045] In some embodiments, the nozzle forms a spray path γ for guiding the cooling air to blow onto the surface of the PE film;

[0046] The angle formed by the spray path γ in contact with the surface of the PE film is defined as the included angle δ; among them, the included angle δ formed by adjacent two nozzles is different.

[0047] Through the above solution, it is realized that the surface of the PE film can be evenly air-cooled, and the effect of air-cooling is improved.

[0048] The beneficial effects of this application are as follows: During the working process, the air compressor can generate cooling air, which is used for air-cooling the just-formed PE film, enabling the PE film to cool down quickly, thereby improving the tensile property of the PE film; through the arranged cooling part, the cooling air can be cooled under the action of the internal coolant. Since the temperature of the cooling air decreases, the temperature of the PE film can also be quickly reduced; through the arranged electronic thermometer, the temperature of the cooling air can be monitored in real time, and the coolant in the air storage tank is used to keep the coolant warm, preventing the temperature of the coolant from being too high and causing the temperature of the cooling air to be unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings constituting a part of this application are used to provide a further understanding of this application, making other features, purposes, and advantages of this application more obvious. The schematic drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation of this application.

[0050] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and elements are not necessarily drawn to scale.

[0051] In the drawings:

[0052] Figure 1 is the overall schematic diagram according to the embodiments of this application;

[0053] Figure 2 is the structural schematic diagram of a part of the embodiment, mainly showing the structure of the blown film machine body;

[0054] Figure 3 is the structural schematic diagram of a part of the embodiment, mainly showing the structures of the air ring and the cooling part;

[0055] Figure 4 is the structural schematic diagram of a part of the embodiment, mainly showing the schematic diagram of the spray path γ and the included angle δ when the nozzle is working;

[0056] Figure 5 is the structural schematic diagram of a part of the embodiment, mainly showing the schematic diagram of the spray path β and the included angle α when working;

[0057] Figure 6 is the structural schematic diagram of a part of the embodiment, mainly showing the structure of the blown film machine body;

[0058] Figure 7 is Figure 4 an enlarged view of part A of

[0059] Reference numerals:

[0060] 1. Platform; 11. Column; 12. Stair; 13. Guardrail; 14. Roller assembly;

[0061] 2. Blown film machine body; 21. Air ring; a21. Opening; a22. Ring groove; a221. Limiting groove;

[0062] 3. Nozzle; 31. Rotating ring; 311. Sealing ring; 312. Louver board; a3. Air outlet;

[0063] 4. Air compressor;

[0064] 5. Cooling part; 51. Shell; 52. Partition board; a5. Refrigeration layer; a51. Inflatable layer; a52. Connection hole; 53. Water baffle; 54. Check valve;

[0065] 6. Cooling pipe;

[0066] 7. Air storage tank. Detailed implementation manners

[0067] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the accompanying drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0068] In addition, it should be noted that only parts related to the relevant invention are shown in the accompanying drawings for the convenience of description. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0069] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.

[0070] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0071] The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0072] Reference Figures 1-7 , a film blowing device for forming and rapidly cooling a PE film, comprising: a platform 1, a film blowing machine body 2, and a roller assembly 14;

[0073] A plurality of columns 11 are provided below the platform 1, and a staircase 12 connected to the ground is provided on the platform 1; the film blowing machine body 2 is located below the platform 1, and the roller assembly 14 is fixedly connected to the platform 1 and located directly above the film blowing machine body 2; furthermore, guardrails 13 are provided on the sides of the staircase 12 and the platform 1;

[0074] The raw materials for making PE film are blown upward into a film through the air ring 21 on the film blowing machine body 2. The film-shaped PE film is then transferred upward through rollers to other storage devices on the PE film production line. When the rollers need to be inspected or replaced, the user can directly walk to the platform 1 through the stairs 12. The platform 1 half-wraps the roller assembly 14 in the middle, making it more convenient to operate.

[0075] In some embodiments, the film blowing device for forming and rapidly cooling the PE film further comprises: a nozzle 3, an air compressor 4, and a cooling unit 5;

[0076] The air ring 21 forms an opening a21 for discharging the material. A plurality of nozzles 3 are arranged in a circular pattern on the side of the opening a21 of the air ring 21 and along the circumference of the opening a21. The nozzles 3 are connected to the air outlet pipe of the air compressor 4 so that the nozzles 3 spray cooling air generated by the air compressor 4 for cooling the PE film.

[0077] By setting up the above scheme, the cooling speed of the PE film after forming can be accelerated, and the tensile strength of the PE film can be effectively improved.

[0078] More specifically, the surface portion of the air ring 21 is concave to form an annular groove a22, which is circumferentially around the opening a21; the inner wall portion of the annular groove a22 is concave to form a limiting groove a221, and the extending direction of the limiting groove a221 is consistent with the extending direction of the annular groove a22; the inner wall of the annular groove a22 is rotated to set a rotating ring 31, and the side wall portion of the rotating ring 31 is convex, and the convex portion extends along the circumferential direction of the rotating ring 31 to form a sealing ring 31 corresponding to the limiting groove a221. 11; Specifically, a cooling portion 5 is formed below the annular groove a22, and the cooling portion 5 is connected to the air compressor 4. With this arrangement, the air from the air compressor 4 first enters the cooling portion 5. The bottom of the annular groove a22 is provided with an air outlet a3 that communicates with the cooling portion 5. In this way, the sealing ring 311 is inserted into the limiting ring to limit the rotating ring 31 in the axial direction of the annular groove a22. At the same time, due to the provision of the sealing ring 311, the gas in the annular groove a22 will not leak out.

[0079] In some embodiments, the rotating ring 31 is located on the surface within the annular groove a22, and louvers 312 are annularly arrayed along the circumferential direction of the rotating ring 31; there is a spacing between the louvers 312 and the nozzle 3; through the arrangement of the louvers 312, the cooling air passing through the louvers 312 can be more concentrated at the part where the nozzle 3 is connected to the annular groove a22; in this way, the gas ejected from the nozzle 3 can be more powerful, improving the cooling effect.

[0080] More specifically, the air outlet a3 forms a jet path β for guiding the cooling air to blow towards the louvers 312, and the jet path β forms an angle α with the surface of the louvers 312; the value of the angle α is 60°; when the gas is ejected from the air outlet a3, it will blow towards the louvers 312, and then drive the rotating ring 31 to start rotating.

[0081] As a preferred implementation, a number of balls are embedded in the sealing ring 311. Through the arrangement of the balls, the frictional force between the sealing ring 311 and the inner wall of the limiting groove a221 can be reduced; in this way, it is convenient for the cooling air to drive the rotation of the louvers 312; through the rotation of the rotating ring 31, the nozzle 3 can be driven to start rotating, so that the cooling air blows evenly towards the PE film.

[0082] Specifically, the nozzle 3 forms a jet path γ for guiding the cooling air to blow towards the surface of the PE film. The angle formed by the jet path γ in contact with the surface of the PE film is defined as the angle δ; among them, the angles δ formed by adjacent two nozzles 3 are different; as a preferred implementation, the angles of the jet paths γ formed by six consecutive nozzles 3 in the clockwise / counterclockwise direction are 28°, 48°, 68°, 88°, 68°, 48° respectively; specifically, the nozzles 3 on the rotating ring 31 are set in multiple groups with these six nozzles 3 as a group; with such an arrangement, the contact area between the blown cooling air and the PE film can be larger, improving the cooling effect.

[0083] In some embodiments, the cooling part 5 includes a housing 51 fixed on the air ring 21 and a partition plate 52 arranged in the internal space of the housing 5; the partition plate 52 divides the internal space of the housing 5 into a refrigeration layer a5 and an inflation layer a51; among them, the refrigeration layer a5 is close to the annular groove a22, and the air outlet a3 is communicated with the refrigeration layer a5; the refrigeration layer a5 is filled with a refrigerant, and the refrigerant preferably uses clear water; there is a spacing between the surface of the refrigerant and the upper end of the refrigeration layer a5; specifically, a connection hole a52 communicating with the air outlet hole is formed by the inner top wall of the refrigeration layer a5 penetrating through to the annular groove a22. The connection hole a52 is in a flared shape, and the end with a smaller diameter is communicated with the air outlet hole; among them, the inner top wall of the refrigeration layer a5 is in an arc shape, and with such an arrangement, the gas can be gathered in the arc-shaped depression.

[0084] Through the above scheme setting, the air passing through the refrigerant can be cooled, so that the temperature of the cooling air is lower than the room temperature; since the cooling speed of the PE film can be effectively increased after the temperature of the cooling air is reduced; since the trumpet-shaped connecting hole a52 is provided, the air will be compressed when passing through the connecting hole a52, resulting in a faster flow rate, and combined with the air outlet a3, a larger air flow can be obtained to stably drive the rotation of the rotating ring 31;

[0085] More specifically, a water baffle 53 is arranged at the end with a larger aperture of the connecting hole a52; a leak groove is provided on the water baffle 53; through the setting of the water baffle 53, it can prevent the refrigerant from splashing into the connecting hole a52 when the air comes out of the refrigerant, affecting the jetting effect.

[0086] Specifically, a plurality of one-way valves 54 communicating the refrigerating layer a5 and the inflating layer a51 are arranged on the surface of the partition plate 52; the one-way valves 54 only allow the gas in the inflating layer a51 to enter the refrigerating layer a5; among them, the air outlet pipe on the air compressor 4 is communicated with the inflating layer a51, so that the gas enters the inflating layer a51 and then enters the refrigerating layer a5 through the one-way valves 54. Since the one-way valves 54 are uniformly arranged along the circumferential direction of the refrigerating layer a5; the gas can be in uniform contact with the refrigerant, thereby effectively improving the cooling effect of the gas.

[0087] In some embodiments, a cooling pipe 6 is fixedly provided on the inner wall of the refrigerating layer a5 close to the outside, and the cooling pipe 6 is communicated with an external gas storage tank 7; the nitrogen in the gas storage tank 7 is intermittently filled into the cooling pipe 6, so that the surface of the cooling pipe 6 can be cooled, and further the coolant can be cooled; such a setting can ensure that the coolant is always in the optimal refrigerating state;

[0088] Specifically, an electronic thermometer for detecting the temperature of the cooling air is further arranged on the surface of the air ring 21, and the electronic thermometer is electrically connected to an electromagnetic valve arranged on the gas storage tank 7. There is a refrigerant in the gas storage tank 7, and the refrigerant preferably uses freon; more specifically, an information processor electrically connected to the electronic thermometer is further arranged on the air ring 21; the information processor is electrically connected to a controller, and the controller is used to control the opening and closing of the electromagnetic valve; among them, a pressure relief valve is arranged on the surface of the cooling pipe 6; through the setting of the pressure relief valve, the pressure in the cooling pipe 6 can be kept constant.

[0089] Embodiment Two

[0090] In some embodiments, the blown film device for rapid cooling of PE film forming further includes: a nozzle 3, an air compressor 4, and a cooling part 5;

[0091] The air ring 21 forms an opening a21 for discharging materials. A number of spray heads 3 are arranged in a circular array along the circumferential direction of the opening a21 on the side of the opening a21 of the air ring 21. The spray heads 3 are connected to the air outlet pipes on the air compressor 4 so that the spray heads 3 spray cooling air generated by the air compressor 4 for cooling the PE film.

[0092] Through the setting of the above solution, the cooling speed after the PE film is formed can be accelerated, and the tensile strength of the PE film is effectively improved.

[0093] More specifically, a ring groove a22 is formed by the inner concave of a part of the surface of the air ring 21, and the ring groove a22 extends around the circumferential direction of the opening a21 for one week. A limiting groove a221 is formed by the inner concave of a part of the inner wall of the ring groove a22, and the extending direction of the limiting groove a221 is the same as that of the ring groove a22. A rotating ring 31 is rotatably arranged on the inner wall of the ring groove a22. A part of the side wall of the rotating ring 31 protrudes, and the protruding part extends around the circumferential direction of the rotating ring 31 for one week to form a sealing ring 311 corresponding to the limiting groove a221. Specifically, a cooling part 5 is formed below the ring groove a22, and the cooling part 5 is connected to the air compressor 4. In this way, the air coming out of the air compressor 4 first enters the cooling part 5. Among them, an air outlet a3 communicating with the cooling part 5 is arranged at the bottom of the ring groove a22. In this way, the sealing ring 311 is inserted into the limiting ring so that the rotating ring 31 is limited in the axial direction of the ring groove a22. At the same time, due to the setting of the sealing ring 311, the gas in the ring groove a22 will not leak out.

[0094] In some embodiments, louver plates 312 are arranged in a circular array on the surface of the rotating ring 31 located in the ring groove a22 along the circumferential direction of the rotating ring 31. There is a distance between the louver plates 312 and the spray heads 3. Through the setting of the louver plates 312, the cooling air passing through the louver plates 312 can be more concentrated at the part where the spray heads 3 are connected to the ring groove a22. In this way, the gas sprayed by the spray heads 3 can be more powerful, and the cooling effect is improved.

[0095] More specifically, the air outlet a3 forms a spraying path β for guiding the cooling air to blow towards the louver plates 312, and the spraying path β forms an angle α with the surface of the louver plates 312. The value of the angle α is 60°. When the gas is sprayed out of the air outlet a3, it will blow towards the louver plates 312 and then drive the rotating ring 31 to start rotating.

[0096] As a preferred implementation scheme, a number of balls are embedded on the sealing ring 311. Through the setting of the balls, the friction between the sealing ring 311 and the inner wall of the limiting groove a221 can be reduced. In this way, it is convenient for the cooling air to drive the rotation of the louver plates 312. Through the rotation of the rotating ring 31, the spray heads 3 can be driven to start rotating, so that the cooling air blows evenly towards the PE film.

[0097] Specifically, the nozzle 3 forms a jet path γ for guiding the cooling air flow towards the surface of the PE film, and the angle formed by the contact between the jet path γ and the surface of the PE film is defined as the included angle δ. Among them, the included angle δ formed by adjacent two nozzles 3 is different. As a preferred embodiment, the angles of the jet paths γ formed by six consecutive nozzles 3 in the clockwise / counterclockwise direction are 38°, 48°, 58°, 68°, 58°, and 48° respectively. Specifically, the nozzles 3 on the rotating ring 31 are set in multiple groups with these six nozzles 3 as a group. By setting in this way, the contact area between the blown cooling air and the PE film can be made larger, improving the cooling effect.

[0098] In some embodiments, the cooling part 5 includes a housing 51 fixed on the air ring 21 and a partition plate 52 arranged in the inner space of the housing 51. The partition plate 52 divides the inner space of the housing 51 into a refrigeration layer a5 and an inflation layer a51. Among them, the refrigeration layer a5 is close to the annular groove a22, and the air outlet a3 is communicated with the refrigeration layer a5. The refrigeration layer a5 is filled with a refrigerant, and preferably 35% brine is used as the refrigerant. There is a distance between the surface of the refrigerant and the upper end of the refrigeration layer a5. Specifically, the inner top wall of the refrigeration layer a5 penetrates through to the annular groove a22 to form a connection hole a52 communicated with the air outlet hole. The connection hole a52 is in a flared shape, and the end with a smaller diameter is communicated with the air outlet hole. Among them, the inner top wall of the refrigeration layer a5 is in an arc shape. By setting in this way, the gas can be gathered in the arc-shaped depression.

[0099] Through the above scheme setting, the air passing through the refrigerant can be cooled, making the temperature of the cooling air lower than the room temperature. Since the cooling speed of the PE film can be effectively increased after the temperature of the cooling air is reduced. Due to the setting of the flared connection hole a52, the air will be compressed when passing through the connection hole a52, resulting in a faster flow rate. Combined with the air outlet a3, a larger and more stable air flow can drive the rotation of the rotating ring 31.

[0100] More specifically, a water baffle � is arranged at the end with a larger diameter of the connection hole a52. The water baffle 53 is provided with air leakage grooves. Through the setting of the water baffle 53, it can prevent the refrigerant from splashing into the connection hole a52 when the air comes out of the refrigerant, affecting the jetting effect.

[0101] Specifically, a plurality of one-way valves 54 communicating the refrigeration layer a5 and the inflation layer a51 are arranged on the surface of the partition plate 52. The one-way valve 54 only allows the gas in the inflation layer a51 to enter the refrigeration layer a5. Among them, the air outlet pipe on the air compressor 4 is communicated with the inflation layer a51, so that the gas enters the inflation layer a51 and then enters the refrigeration layer a5 through the one-way valve 54. Since the one-way valves 54 are arranged evenly along the circumferential direction of the refrigeration layer a5, the gas can be in uniform contact with the refrigerant, thus effectively improving the cooling effect of the gas.

[0102] Embodiment III

[0103] A cooling pipe 6 is fixedly arranged on the inner wall of the refrigeration layer a5 close to the outside. The cooling pipe 6 is communicated with an external gas storage tank 7, and nitrogen in the gas storage tank 7 is intermittently filled into the cooling pipe 6, so that the surface temperature of the cooling pipe 6 can be reduced, and further the coolant can be cooled; such a setting can ensure that the coolant is always in the optimal refrigeration state;

[0104] Specifically, an electronic thermometer for detecting the temperature of the cooling air is also arranged on the surface of the air ring 21. The electronic thermometer is electrically connected to an electromagnetic valve arranged on the gas storage tank 7; more specifically, an information processor electrically connected to the electronic thermometer is also arranged on the air ring 21; the information processor is electrically connected to a controller, and the controller is used to control the opening and closing of the electromagnetic valve; wherein, a pressure relief valve is arranged on the surface of the cooling pipe 6; through the setting of the pressure relief valve, the pressure in the cooling pipe 6 can be kept constant;

[0105] Through the setting of the above device, the temperature of the cooling air is set to be below 10°C in the information processor. When the electronic thermometer detects that the temperature of the cooling air is higher than 10°C, the information processor transmits a signal to the controller, and the controller will control the electromagnetic valve to open, so that the refrigerant in the gas storage tank 7 is filled into the cooling pipe 6 to cool the coolant, so that the temperature of the coolant is at least lower than 10°C; thus ensuring that the temperature of the cooling air is always lower than 10°C.

[0106] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A film blowing device for rapid cooling of PE film forming, comprising: A platform, supported by multiple legs at the bottom; A film blowing machine body, placed on the ground and located below the platform; A roller assembly, arranged on the platform and directly above the film blowing machine body; Among them, the film blowing machine body has an air ring for discharging materials; It is characterized in that: The film blowing device for rapid cooling of PE film forming further comprises: Several nozzles, arranged on the surface of the air ring, spraying cooling air for cooling the PE film; An air compressor, having an air outlet pipe connected to the nozzles; A cooling part, formed inside the air ring, communicating with both the nozzles and the air outlet pipe, and filled with a coolant inside; Among them, a cooling pipe is arranged inside the cooling part, which is connected to an external gas storage tank, and a refrigerant is stored in the gas storage tank; an electronic thermometer for detecting the temperature of the cooling air is also arranged inside the air ring, and the electronic thermometer is electrically connected to an electromagnetic valve arranged on the gas storage tank; A rotating ring for supporting the nozzles is rotatably arranged on the surface of the air ring; A ring groove corresponding to the rotating ring is formed by partial concave on the surface of the air ring; The ring groove communicates with the cooling part; Louver plates are annularly arranged along the circumferential direction of the rotating ring on the surface of the rotating ring located inside the ring groove; There is a spacing between the louver plates and the nozzles; An air outlet communicating with the refrigeration part is formed at the bottom of the ring groove; Among them, the air outlet forms a spraying path β for guiding the cooling air to blow towards the louver plates, and the spraying path β forms an angle α with the surface of the louver plates; The value of this angle α is 45° - 90°; The cooling part includes a housing fixedly arranged on the air ring and a partition plate arranged inside the internal space of the housing; The partition plate divides the internal space of the housing into a refrigeration layer and an inflation layer; Among them, the refrigeration layer is close to the nozzles; Several one-way valves communicating the refrigeration layer and the inflation layer are arranged on the surface of the partition plate; The one-way valves only allow the gas in the inflation layer to enter the refrigeration layer; The cooling pipe is laid inside the refrigeration layer; The cooling pipe is laid annularly along the circumference of the refrigeration layer; Among them, a pressure relief valve is arranged on the surface of the cooling pipe.

2. The film blowing device for rapid cooling of PE film forming according to claim 1, characterized in that: An information processor electrically connected to the electronic thermometer is also arranged on the air ring; The information processor is electrically connected to a controller, and the controller is used to control the opening and closing of the electromagnetic valve.

3. The film blowing device for rapid cooling of PE film forming according to claim 1, characterized in that: A connection hole communicating with the air outlet hole is formed by penetrating the inner top wall of the refrigeration layer to the ring groove; The connection hole is in a flared shape, and the end with a smaller diameter communicates with the air outlet hole; A water baffle is arranged at the end with a larger diameter of the connection hole; an air leakage groove is opened on the water baffle.

4. The film blowing device for rapid cooling of PE film forming according to claim 3, characterized in that: The top of the refrigeration layer is in an arc shape.

5. The film blowing device for rapid cooling of PE film forming according to claim 1, characterized in that: The nozzles form a spraying path γ for guiding the cooling air to blow towards the surface of the PE film; The angle formed by the spray path γ in contact with the surface of the PE film is defined as the included angle δ; among them, the included angle δ formed by adjacent two nozzles is different.

Images