A centerless tube continuous spiral baffle forming machine and method

Abstract

The present application discloses a centerless tube continuous spiral baffle forming machine and method, including an upper spiral die and a lower spiral die. The end faces of the upper spiral die and the lower spiral die fit with each other. A cylindrical ice storage device is arranged outside the lower spiral die. An ice layer can be formed inside the cylindrical ice storage device, filled between the cylindrical ice storage device and the lower spiral die, and a flat bearing table is formed above the end face of the lower spiral die. After heat treatment to eliminate stress, a flat circular ring that is easier to shape can be placed flat on the bearing table. The upper spiral die quickly presses down, causing the heat-treated flat circular ring to be quickly squeezed between the upper spiral die and the lower spiral die, realizing spiral surface shaping and simultaneously completing rapid cooling, and a centerless continuous spiral baffle can be manufactured. The spiral baffle has an ideal curve and the spiral of the center hole tends to be a straight line. At the same time, completing spiral forming and quenching can improve quality and efficiency, is suitable for industrial processing and production, and facilitates the splicing operation of multiple centerless continuous spiral baffles in the later stage.

Description

Technical Field

[0001] This application belongs to the field of spiral baffle forming, and particularly relates to a centerless tube continuous spiral baffle forming machine and method. Background Art

[0002] Heat exchangers are very important heat exchange devices and energy-saving devices for realizing heat transfer between media at different temperatures. The baffle of a heat exchanger is an element installed inside the heat exchanger. The baffle can change the flow mode of the fluid in the heat exchanger, causing the fluid to generate turbulence on the heat transfer surface, thereby enhancing the heat transfer effect on the heat transfer surface. The baffle can break the laminar flow state of the fluid, increase the contact area between the fluid and the heat transfer surface, and improve the heat transfer coefficient. Among them, spiral baffle heat exchangers are widely used in industrial production in China. Its basic design concept is to adopt a spiral baffle structure unfolded along the axis of the shell in the shell side, so that the shell side fluid in the heat exchanger flows in a continuous spiral shape. It strengthens the heat transfer in the shell side, eliminates the flow dead zone of the shell side fluid, reduces the flow pressure drop in the shell side, and reduces the energy consumption of the heat exchanger.

[0003] In order to make spiral baffle heat exchangers widely used, technicians in this field have done a lot of research on improving spiral baffles and invented many different types of spiral baffle heat exchangers. For example, the first generation of segmented spiral baffles is a discontinuous spiral baffle, which is generally connected by several 1 / 4 fan-shaped flat plates instead of spiral curved surfaces to form an approximate spiral surface. The processing is simple and the processing technology is relatively mature, but the connection between the fan-shaped plates is a non-smooth sharp-angle transition, which has a reverse pressure on the axially moving fluid. The sudden turn of the fluid when passing through will cause energy loss. The energy consumption is more serious when the spiral angle is large; when two adjacent fan-shaped plates are connected in space, an additional corner plate must be added to fill the gap, which is labor-intensive and material-intensive, and increases the resistance of the fluid. Therefore, the second generation of continuous spiral baffles with a central tube appeared. The continuous spiral baffle heat exchanger with a central tube is a heat exchanger with a central tube arranged at the central axis of the continuous spiral baffle, and the spiral baffle is a continuous spiral structure around the central tube. The reason for adding a central tube to the central area of ​​the spiral baffle is that the inclination angle of the central axis of the spiral baffle is too large, which makes it difficult to process the central position of the spiral baffle. The central tube occupies part of the heat exchange tube position, reduces the heat exchange area, reduces the utilization rate of the shell space, leads to a decrease in heat exchange efficiency, and reduces the overall performance of the heat exchanger. At the same time, the stress state has a certain impact. After that, the technicians developed a center tube-free, continuous spiral baffle, which has an ideal spiral surface. The spiral line of the central hole of the continuous spiral baffle tends to be a straight line. The shell-side medium flows along the continuous spiral path in a spiral plunger flow. The flow field is stable and the temperature distribution is uniform. It reduces the occurrence of interruption and leakage in the intermittent spiral baffle heat exchanger, reduces the shell resistance, and improves the heat transfer efficiency. The spiral flow path makes the shell-side medium continuously stressed in the same direction, reduces the shell-side flow dead zone and heat exchange tube vibration, is not easy to scale on the shell side, and extends the service life of the heat exchanger. The water film produced by steam condensation flows down along the upper surface of the spiral baffles, and impurities can be carried away by the condensed water, which can reduce the blockage of the shell side of the heat exchanger. The heat exchanger without a central tube and continuous spiral baffles has better heat transfer and fluidity, greatly improving the heat exchange efficiency, reducing the shell side resistance and flow dead zone, and reducing the scaling rate and vibration. Among the current spiral baffle heat exchangers, it has the best comprehensive performance.

[0004] Currently, the common method for producing spiral baffles with a central tube is the die method. Specifically, a circular flat plate of a metal material (aluminum plate or steel plate) is cut with a notch along the radial direction and placed between the upper and lower dies with a spiral surface. By extrusion, the required spiral curved plate is formed. The lower die has a guide rod in the middle. During the actual processing, the operator needs to put the flat ring onto the guide rod of the lower die, adjust the position of the notch, and then press down the upper die. Inevitably, there is a large central hole in the pressed spiral blade. Moreover, due to cold pressing forming, there is a large springback and internal stress in the blade, and the final size is difficult to guarantee, making it impossible to form an ideal spiral curved surface. If the guide rod is removed, the circular flat plate cannot be stably placed on the lower die with a spiral surface, and the industrial processing and production of an ideal spiral baffle cannot be achieved. Therefore, the existing technology needs to be further improved and enhanced. Summary of the Invention

[0005] The present invention provides a forming machine and method for a centerless continuous spiral baffle, aiming to solve the problem that the circular flat plate for producing the centerless continuous spiral baffle cannot be stably placed on the lower die during production, resulting in production difficulties.

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

[0007] A forming machine for a centerless continuous spiral baffle includes an upper spiral die and a lower spiral die. The end faces of the upper spiral die and the lower spiral die fit with each other. A cylindrical ice storage device is provided outside the lower spiral die. An ice layer can be formed inside the cylindrical ice storage device, filling the space between the cylindrical ice storage device and the lower spiral die, and forming a flat receiving table above the end face of the lower spiral die. After the flat ring that has been heat-treated is placed on the receiving table, the upper spiral die presses down, causing the flat ring to be extruded between the upper spiral die and the lower spiral die to form a centerless spiral baffle.

[0008] The centerless tube continuous spiral baffle forming machine of the present invention has no guide rod on the lower spiral die, and a cylindrical ice storage device is arranged outside the lower spiral die. During use, the ice layer produced by the cylindrical ice storage device is filled between the cylindrical ice storage device and the lower spiral die, and a flat bearing table is formed above the spiral surface of the lower spiral die. After heat treatment to eliminate stress, the flat circular ring that is easier to shape can be placed flat on the bearing table. The upper spiral die quickly presses down, so that the heat-treated flat circular ring is quickly squeezed between the upper spiral die and the lower spiral die, realizing spiral surface shaping and simultaneously completing rapid cooling, and a centerless continuous spiral baffle can be manufactured. The spiral baffle has an ideal curve, and the spiral of the central hole tends to be a straight line. At the same time, completing spiral forming and quenching can reduce production time, improve production efficiency, and improve product quality: improve the hardness, strength, wear resistance and other properties of the spiral baffle product, accurately control the product shape, improve the dimensional accuracy and geometric shape consistency of the workpiece, be suitable for industrial processing and production, and facilitate the splicing operation of multiple centerless continuous spiral baffles in the later stage.

[0009] In a preferred implementation manner, the height of the bearing table is higher than the plane where the highest point of the lower spiral die is located.

[0010] The design of the height of the ice layer bearing surface ensures that after the heat-treated flat circular ring is placed on the bearing table, the melting ice drops and contacts the surface of the lower spiral die with a buffer time, for example, it can be 0.5 - 1.5 seconds. During this time, the flat circular ring still remains horizontal and stable, and the upper spiral die quickly drops and squeezes the flat circular ring during this time period, thereby completing spiral forming.

[0011] In a preferred implementation manner, the cylindrical ice storage device includes a cylinder body higher than the height of the lower spiral die. The cylinder body is sleeved outside the lower spiral die, and supercooled water is injected into the cylinder body to freeze the supercooled water to form an ice layer.

[0012] In a preferred implementation manner, a closable sealing device is provided at one end of the cylinder body close to the upper spiral die. The action of the sealing device can make the inside of the cylinder body form a closed space. After forming a vacuum environment in the closed space, supercooled water is sent into the closed space, and the cylinder body is vibrated by a vibration device to freeze the supercooled water. A spiral tube is wound around the outside of the cylinder body, and a cryogenic medium is passed through the spiral tube to exchange heat with the liquid water inside the cylinder body to form a hard ice layer.

[0013] In a preferred implementation manner, the sealing device is an aperture structure, and the maximum aperture of the aperture structure is adapted to the diameter of the upper spiral die. The aperture structure drives the opening and closing of the upper end opening of the cylinder body through a driving motor.

[0014] In a preferred implementation manner, the aperture structure includes a plurality of blades. The blades can move to form aperture diameters of different sizes, and when the blades move, they can scrape the ice slurry on the end face to form a flat bearing table.

[0015] In a preferred implementation, the cylinder body is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to a liquid inlet pipe, and the liquid outlet is connected to a liquid outlet pipe. The liquid inlet pipe is provided with a first solenoid valve, and the liquid outlet pipe is provided with a second solenoid valve. During the extrusion deformation process of the heat-treated flat ring, the second solenoid valve is opened to allow the melted liquid water to flow out to the supercooled water generating device for recycling.

[0016] In a preferred implementation, a water level measuring device is provided inside the cylinder body. When the water level measuring device detects that the height of the supercooled water reaches the designed position, it transmits a signal to the controller, and the controller controls the first solenoid valve to close.

[0017] In a preferred implementation, the upper spiral die is divided into three parts, which are, from top to bottom, a connecting block, a heat insulation plate, and a cooling plate. One side of the connecting block is connected to the piston rod of the hydraulic cylinder, and the other side is connected to the cooling plate. The upper spiral die is connected to the cooling plate, and the cooling plate is internally provided with pipelines to cool the upper spiral die.

[0018] The usage method of the centerless tube continuous spiral baffle forming machine includes the following steps:

[0019] S1: Start the sealing device to seal the upper opening of the cylinder body of the ice storage device of the cylinder body. After the air inside the cylinder body is pumped out by the vacuum device, the supercooled water generating device pumps the supercooled water into the cylinder body until the water level reaches the plane where the water level measuring device is located;

[0020] S2: Turn on the vibration device to vibrate the supercooled water inside the cylinder body for 5 s. After the vibration ends, turn on the sealing device so that the blade can scrape the ice sand on the upper side of the cylinder body to form a flat bearing surface;

[0021] S3: Circulate the cryogenic medium in the spiral tube outside the cylinder body to turn the ice-like supercooled water inside the cylinder body into hard ice;

[0022] S4: Heat the flat ring to 800 °C - 950 °C, place the flat ring on the bearing surface through a fixture, and make the notch of the flat ring correspond to the initial spiral position of the lower spiral die;

[0023] S5: Quickly lower the upper spiral die to squeeze the heat-treated flat ring between the upper spiral die and the lower spiral die, and simultaneously complete the forming and quenching operations. Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 A schematic structural diagram of a centerless tube continuous spiral baffle forming machine of the present application is shown;

[0026] Figure 2 Shows a schematic diagram of a usage state of the centerless tube continuous spiral baffle forming machine of the present application;

[0027] Figure 3 Shows a schematic structural diagram of a schematic implementation manner of the cylindrical ice storage device of the present application;

[0028] Figure 4 Shows a schematic structural diagram of a schematic implementation manner of the sealing device of the present application;

[0029] Figure 5 Shows a schematic structural diagram of a schematic implementation manner of the blade of the sealing device of the present application;

[0030] Figure 6 Shows a schematic flow chart of a method for using the centerless tube continuous spiral baffle forming machine of the present application.

[0031] Label description:

[0032] 10 - upper spiral die; 100 - connecting block; 101 - heat insulation plate; 102 - cooling plate; 11 - lower spiral die; 12 - cylindrical ice storage device; 120 - cylinder body; 1200 - liquid inlet; 1201 - liquid inlet pipe; 1202 - first solenoid valve; 1203 - liquid outlet; 1204 - liquid outlet pipe; 1205 - second solenoid valve; 13 - spiral tube; 14 - water level measuring device; 15 - sealing device; 150 - blade; 1500 - scraper; 151 - driving motor; 16 - subcooled water generating device; 17 - base; 2 - subcooled water; 20 - receiving table; 3 - flat ring. Detailed implementation manners

[0033] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0034] First, the technical concept of the technical solution disclosed by the present invention is described.

[0035] The present invention is described below with reference to the accompanying drawings of the specification.

[0036] The specific solution adopted is:

[0037] As Figure 1-6As shown in the figure, the present invention provides a centerless tube continuous spiral baffle forming machine, which includes an upper spiral die 10 and a lower spiral die 11. The end faces of the upper spiral die 10 and the lower spiral die 11 are fitted to each other. A cylindrical ice storage device 12 is provided outside the lower spiral die 11. An ice layer can be formed inside the cylindrical ice storage device 12, filled between the cylindrical ice storage device 12 and the lower spiral die 11, and a flat receiving table 20 is formed above the end face of the lower spiral die 11. After the heat-treated flat ring 3 is placed on the receiving table 20, the upper spiral die 10 presses down to squeeze the flat ring 3 between the upper spiral die 10 and the lower spiral die 11 to realize the forming of the centerless tube spiral baffle.

[0038] For the centerless tube continuous spiral baffle forming machine of the present invention, by providing a cylindrical ice storage device 12 outside the lower spiral die 11, during use, the ice layer produced by the cylindrical ice storage device 12 is filled between the cylindrical ice storage device 12 and the lower spiral die 11, and a flat receiving table 20 is formed above the spiral surface of the lower spiral die 11, that is, an ice column wrapping the lower spiral die 11 is formed. After stress is eliminated through heat treatment, the flat ring 3 that is easier to shape can be placed flat on the receiving table 20. The upper spiral die 10 quickly presses down to quickly squeeze the heat-treated flat ring 3 between the upper spiral die 10 and the lower spiral die 11, realizing the spiral surface shaping while completing rapid cooling. At the same time, completing forming and quenching can reduce production time, improve production efficiency, and improve product quality: improve the hardness, strength, wear resistance and other properties of the spiral baffle product, precisely control the product shape, improve the dimensional accuracy and geometric shape consistency of the workpiece, be suitable for industrial processing production, and facilitate the splicing operation of multiple centerless continuous spiral baffles in the later stage.

[0039] As a preferred embodiment of the present application, refer to Figure 3 , the height of the receiving table 20 is higher than the plane where the highest point of the lower spiral die 11 is located. The design of the height of the ice layer receiving surface ensures that after the heat-treated flat ring 3 is placed on the receiving table 20, the melting ice drops and contacts the surface of the lower spiral die 11 for a time, for example, it can be 0.5 - 1.5 seconds. During this time, the flat ring 3 still remains stable, and the upper spiral die 10 quickly drops and squeezes the flat ring 3 during this time period, thus completing the spiral forming.

[0040] As a preferred embodiment of the present application, refer to Figure 1-3, the cylindrical ice storage device 12 includes a cylinder body 120 that is higher than the height of the lower spiral die 11. The cylinder body 120 is sleeved outside the lower spiral die 11, and supercooled water is injected into the cylinder body 120. Supercooled water remains in a liquid state below 0°C. Supercooled water is unstable. This supercooled water may instantaneously freeze when encountering any form of disturbance, such as shaking, vibration, impact, adding objects, etc., because these disturbances provide an active center for triggering ice formation. Therefore, its characteristics can be utilized to quickly form ice inside the cylinder body 120 for processing and producing spiral baffles.

[0041] Specifically, in this embodiment, Figure 1 、 Figure 3 and Figure 4 , at one end of the cylinder body 120 close to the upper spiral die 10, there is an openable and closable sealing device 15. The action of the sealing device 15 can form a closed space inside the cylinder body 120. After forming a vacuum environment in the closed space, supercooled water is sent into the closed space. When the supercooled water (water below its freezing point) enters the vacuum environment, the supercooled water 2 contacts the cold surface or cold object in the vacuum environment, and it will quickly solidify into ice. This is because under low-pressure conditions, the freezing point of water will decrease, making it easier for supercooled water to solidify. Then, the cylinder body 120 is vibrated through a vibration device such as a small motor to further freeze the supercooled water, so that almost all of the supercooled water inside the cylinder body 120 is converted into a slush state, presenting a texture similar to slush, and it still cannot support the flat ring 3. Therefore, it needs to be converted into hard ice. To improve the conversion efficiency, a spiral tube is wound around the outside of the cylinder body 120, and a cryogenic medium, such as liquid nitrogen, is passed through the spiral tube 13 to exchange heat with the liquid water inside the cylinder body 120 to quickly form a hard ice layer.

[0042] Among them, referring to Figure 4 and 5 , the sealing device 15 is an existing aperture structure. The maximum aperture diameter of the aperture structure is adapted to the diameter of the spiral die. The aperture structure drives the opening and closing of the upper end opening of the cylinder body 120 through a driving motor 151. The aperture structure includes a plurality of blades 150. The blades 150 can move to form different sizes of aperture diameters. To ensure the flatness of the upper end surface of the formed ice layer, a scraper 1500 perpendicular to the blades 150 is provided on the surface of the blades 150 facing the cylinder body 120. When the blades 150 move, the scraper can scrape the slush on the end surface to form a flat receiving table 20 when forming hardened ice.

[0043] In addition, to control the production height of the ice layer, in this embodiment, referring to Figure 3, the cylinder body 120 is provided with a liquid inlet 1200 and a liquid outlet 1203. The liquid inlet 1200 is connected to a liquid inlet pipe 1201, and the liquid outlet 1203 is connected to a liquid outlet pipe 1204. A first electromagnetic valve 1202 is provided on the liquid inlet pipe 1201, and a second electromagnetic valve 1205 is provided on the liquid outlet pipe 1204. During the extrusion deformation process of the heat-treated flat ring 3, the ice layer will melt into liquid water. The second electromagnetic valve 1205 is opened to allow the melted liquid water to flow out to the supercooled water generating device 16 for recycling. The supercooled water generating device 16 is prior art and will not be elaborated in this application.

[0044] In order to control the generation height of the ice layer, in this embodiment, a water level measuring device 14 is provided inside the cylinder body 120, which can be, for example, an ultrasonic water level gauge. When the water level measuring device 14 detects that the height of the supercooled water reaches the designed position, it transmits a signal to the controller, and the controller controls the first electromagnetic valve 1202 to close.

[0045] In order to avoid thermal stress deformation of the upper spiral die 10, in this embodiment, the upper spiral die 10 is divided into three parts, which are, from top to bottom, a connecting block 100, a heat insulation plate 101, and a cooling plate 102. One side of the connecting block 100 is connected to the piston rod of the hydraulic cylinder. The hydraulic cylinder is arranged on the base 17, and the other side is connected to the cooling plate 102. The upper spiral die is connected to the cooling plate 102. The cooling plate 102 has internal pipelines, which are not shown in the figure. The above design can cool down the upper spiral die to enable continuous operation.

[0046] The usage method of the centerless tube continuous spiral baffle forming machine includes the following steps:

[0047] S1: Start the sealing device 15 to seal the upper opening of the ice storage device cylinder body 120 of the cylinder body 120. After the air inside the cylinder body 120 is pumped out by the vacuum device, the supercooled water generating device 16 pumps the supercooled water into the cylinder body 120 until the water level reaches the plane where the water level measuring device 14 is located;

[0048] S2: Turn on the vibration device to vibrate the supercooled water inside the cylinder body 120 for 5 s. After the vibration ends, turn on the sealing device 15 so that the blade 150 can scrape the ice sand on the upper side of the cylinder body 120 to form a flat receiving table 20;

[0049] S3: Circulate the ultra-low temperature medium inside the spiral tube outside the cylinder body 120 to turn the ice-like supercooled water inside the cylinder body 120 into hard ice;

[0050] S4: Heat the flat ring 3 to 800 °C - 950 °C, place the flat ring 3 on the receiving table 20 through a fixture, and make the notch of the flat ring 3 correspond to the initial spiral position of the lower spiral die 11;

[0051] S5: Rapidly lower the upper spiral die 10 to extrude the heat-treated flat ring 3 between the upper spiral die 10 and the lower spiral die 11, simultaneously completing the forming and quenching operations.

[0052] What is not described in this invention can be achieved by adopting or referring to the existing technologies.

[0053] In the description of this invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this invention. In this invention, unless otherwise clearly specified and defined, when the first feature is "above" or "below" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0054] In this invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium. It may be the internal communication of two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in this invention can be understood according to specific circumstances.

[0055] In this invention, descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of such features.

[0056] The above is only the specific implementation manner of this invention, but the protection scope of this invention is not limited thereto. Any person skilled in the art in the technical field disclosed by this invention can easily think of various changes or substitutions within the technical scope disclosed by this invention, and these should all be covered by the protection scope of this invention. Therefore, the protection scope of this invention should be subject to the protection scope of the claims.

Claims

1. A center tube-free continuous spiral baffle forming machine, characterized in that: It comprises an upper spiral mold and a lower spiral mold, the end surfaces of the upper spiral mold and the lower spiral mold are matched with each other, a cylindrical ice storage device is arranged outside the lower spiral mold, an ice layer can be formed in the cylindrical ice storage device, and is filled between the cylindrical ice storage device and the lower spiral mold, and a flat receiving table is formed above the end surface of the lower spiral mold, after a heated flat plate ring is placed on the receiving table, the upper spiral mold is pressed downward to squeeze the flat plate ring between the upper spiral mold and the lower spiral mold to realize the forming of a spiral baffle without a central tube; The height of the receiving table is higher than the plane where the highest point of the lower spiral mold is located. The height design of the ice layer receiving table ensures that after the heated flat plate ring is placed on the receiving table, there is a time period for the melted ice to descend and contact the surface of the lower spiral mold. During this time period, the flat plate ring is guaranteed to be stable, and the upper spiral mold falls quickly during this time period to squeeze the flat plate ring to complete the spiral forming.

2. A center tube-free continuous spiral baffle forming machine according to claim 1, characterized in that: The cylindrical ice storage device comprises a cylinder body which is higher than the lower spiral mold, the cylinder body is sleeved on the outer side of the lower spiral mold, and supercooled water is injected into the cylinder body to freeze the supercooled water to form an ice layer.

3. A center tube-free continuous spiral baffle forming machine according to claim 2, characterized in that: An openable and closable sealing device is provided at one end of the cylinder near the upper spiral mold. The operation of the sealing device can form a closed space inside the cylinder. After the closed space forms a vacuum environment, supercooled water is sent into the closed space, and the cylinder is vibrated by a vibration device to freeze the supercooled water. A spiral tube is wrapped around the outside of the cylinder, and an ultra-low temperature medium is passed into the spiral tube to exchange heat with the liquid water inside the cylinder to form a hard ice layer.

4. A center tube-free continuous spiral baffle forming machine according to claim 3, characterized in that The sealing device is an aperture structure, the maximum aperture of the aperture structure is adapted to the diameter of the upper spiral mold, and the aperture structure is driven by a driving motor to open and close the upper end of the cylinder.

5. A center tube-free continuous spiral baffle forming machine according to claim 4, characterized in that The aperture structure includes a plurality of blades, which can move to form apertures of different sizes. When the blades move, they can scrape the ice slurry on the end surface to form a flat receiving table surface.

6. A center tube-free continuous spiral baffle forming machine according to claim 5, characterized in that: The cylinder is provided with a liquid inlet and a liquid outlet, the liquid inlet is connected to the liquid inlet pipe, the liquid outlet is connected to the liquid outlet pipe, the liquid inlet pipe is provided with a first solenoid valve, and the liquid outlet pipe is provided with a second solenoid valve. During the extrusion deformation process of the flat plate ring during heat treatment, the second solenoid valve is opened to allow the melted liquid water to flow out to the supercooled water generating device for recycling.

7. A center tube-free continuous spiral baffle forming machine according to claim 6, characterized in that: A water level measuring device is provided in the cylinder. When the water level measuring device detects that the height of the supercooled water reaches the designed position, a signal is transmitted to the controller, and the controller controls the first solenoid valve to close.

8. The center tube-free continuous spiral baffle forming machine according to claim 1, characterized in that: The upper spiral mold is divided into three parts, which are a connecting block, a heat insulation plate and a cooling plate from top to bottom. One side of the connecting block is connected to the piston rod of the hydraulic cylinder, and the other side is connected to the heat insulation plate. The lower side of the heat insulation plate is connected to the cooling plate, and the lower side of the cooling plate is connected to the upper spiral mold. The cooling plate has built-in pipelines to cool the upper spiral mold.

9. A method for using the center tube-free continuous spiral baffle forming machine according to claim 7, characterized in that: The following steps are involved: S1: starting the sealing device to seal the upper opening of the cylinder of the cylinder ice storage device, after the air in the cylinder is extracted by the vacuum device, the supercooled water generating device pumps the supercooled water into the cylinder until the water level reaches the plane where the water level height measuring device is located; S2: Turn on the vibration device to vibrate the supercooled water inside the cylinder for 5 seconds. After the vibration ends, turn on the sealing device so that the blades can scrape the slush on the upper side of the cylinder flat to form a flat receiving table surface; S3: circulating the ultra-low temperature medium in the spiral tube outside the cylinder to convert the icy supercooled water inside the cylinder into hard ice; S4: The flat plate ring is heated to 800°C-950°C, and the flat plate ring is placed on the receiving table by a fixture so that the notch of the flat plate ring corresponds to the initial spiral position of the lower spiral die; S5: The upper spiral die is quickly lowered to squeeze the heated flat ring between the upper spiral die and the lower spiral die to complete the forming and quenching operations at the same time.

Images