A gas recovery device for a barrel-type coating machine

Abstract

This invention provides a gas recovery device for a barrel-type coating machine, applied to the heating device of the barrel-type coating machine. The heating device of the barrel-type coating machine includes an insulation tank with a steam outlet. The gas recovery device includes at least one condenser box, a condensing spiral tube, a cold air radiator, and a condensing conduit. The condensing spiral tube is located in each condenser box, and the inlet of each condensing spiral tube is sealed to the steam outlet. The cold air radiator is located in each condenser box, and its inlet is sealed to the inlet of the condensing spiral tube. The two ends of the condensing conduit are sealed to the inlet of the condensing spiral tube and the outlet of the cold air radiator, respectively. The diameter of the condensing conduit is smaller than the diameter of the condensing spiral tube, and the diameter of the condensing conduit is larger than the diameter of the flow channel of the cold air radiator. This invention uses multi-stage cooling to convert high-temperature gaseous diluent and water into low-temperature liquid state after sufficient cooling, and then recovers and reuses the low-temperature liquid diluent and water.

Description

Technical Field

[0001] This invention relates to the field of soft magnetic powder preparation technology, and in particular to a gas recovery device for a barrel-type coating machine. Background Technology

[0002] Soft magnetic materials are a class of magnetic materials with high permeability and low hysteresis loss, mainly used in the manufacture of magnetic components in electronic devices such as motors, transformers, and inductors. Most soft magnetic powders operate in alternating magnetic fields. To reduce eddy current losses generated by soft magnetic powders at high frequencies, a barrel-type coating machine is often used to combine the soft magnetic powders with insulating materials, thereby forming a dense insulating coating layer on the surface of the powder core.

[0003] Existing barrel-type coating machines typically include a coating barrel, a stirring paddle fixed inside the barrel, and a heating device. The stirring paddle thoroughly disperses and mixes a large quantity of soft magnetic powder and insulating material contained in the coating barrel, ensuring that the surface of the soft magnetic powder is uniformly coated with the insulating material. Furthermore, to reduce the viscosity of the insulating material and facilitate the formation of a good, dense insulating coating layer on the surface of the soft magnetic powder, a diluent, such as volatile organic solvents like acetone or ethanol, is usually added to the mixture. The heating device then assists in heating, gradually evaporating the diluent and moisture in the mixture, thereby improving the coating performance and stability of the soft magnetic powder.

[0004] However, the diluent that evaporates during the coating process is often directly discharged, resulting in resource waste, environmental damage, and increased production costs. Therefore, there is an urgent need to design a recycling system to recover and reuse the evaporated diluent. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a gas recovery device for a barrel-type coating machine, which transforms high-temperature gaseous diluent and water into low-temperature liquid state through multi-stage cooling, and then recovers and reuses the low-temperature liquid diluent and water.

[0006] This invention provides a gas recovery device for a barrel-type coating machine, applied in the heating device of the barrel-type coating machine. The heating device of the barrel-type coating machine includes an insulation tank with a steam outlet. The gas recovery device of the barrel-type coating machine includes at least one condenser box, a condenser spiral tube, a condenser radiator, and a condenser conduit. The condenser spiral tube is located in each condenser box, and the inlet of each condenser spiral tube is sealed to the steam outlet. The condenser radiator is located in each condenser box, and its inlet is sealed to the inlet of the condenser spiral tube. The two ends of the condenser conduit are sealed to the inlet of the condenser spiral tube and the outlet of the condenser radiator, respectively. The diameter of the condenser conduit is smaller than the diameter of the condenser spiral tube, and the diameter of the condenser conduit is larger than the diameter of the flow channel of the condenser radiator.

[0007] This invention has the following beneficial effects: First, the high-temperature gas output from the steam outlet enters the condenser spiral tube through the inlet for the first stage of cooling, where a portion of the high-temperature gas can be rapidly converted into a liquid state. Next, the remaining high-temperature gas exits through the inlet of the condenser spiral tube and enters the radiator through the inlet of the radiator. Because the width of the condenser spiral tube is smaller than that of the condenser spiral tube, the flow rate and pressure of the high-temperature gas increase, causing the high-temperature gas to quickly fill the space inside the radiator pipe. Due to the large extension length of the radiator pipe, the contact area with the external cold air is large, allowing a portion of the high-temperature gas inside the pipe to be rapidly converted into a liquid state, completing the second stage of cooling. However, the remaining high-temperature gas is discharged from the outlet of the radiator and enters the condenser conduit through the inlet. Since the width of the condenser conduit is larger than that of the radiator pipe, the flow rate of the high-temperature gas decreases. As a result, the pressure inside the radiator pipe is greater than the gas pressure inside the condenser conduit. Under this pressure, the condensate and high-temperature gas flow into the condenser conduit, where the high-temperature gas completes the third stage of cooling. Afterward, the condensate flows into the condenser spiral tube. Thus, this invention greatly improves the condensation efficiency through three-stage cooling. At the same time, by setting a large-sized condenser spiral tube, the generated liquid can be temporarily stored, while providing some space for the continuous input of high-temperature gas to pass through, ensuring that the condensation process is uninterrupted.

[0008] In addition, the gas recovery device of the barrel-type coating machine according to the present invention may also have the following additional technical features:

[0009] Furthermore, the top and sides of the condenser are respectively provided with a first through hole and a second through hole. The second through hole is used to allow cold air from the atmosphere to enter the condenser, and the first through hole is provided with an exhaust fan, which is used to transfer the hot air in the condenser to the atmosphere.

[0010] Furthermore, the radiator includes multiple U-shaped heat pipes and heat dissipation fins connected in series. The U-shaped heat pipes are inserted into the heat dissipation fins, and the multiple U-shaped heat pipes form the flow channels of the radiator.

[0011] Furthermore, the radiator is arranged around the inner periphery of the condenser box, and the condenser spiral tube is located on the inner bottom wall of the condenser box and partially surrounded by the radiator. The inlet of the condenser spiral tube is higher than its outlet, and the outlet of the condenser spiral tube is flush with the inlet of the radiator.

[0012] Furthermore, the outlet of the radiator is higher than its inlet, and also higher than the inlet of the condenser coil.

[0013] Furthermore, the gas recovery device of the barrel-type coating machine also includes a bucket and a return pipe. The bucket is located on the outside of the bottom wall of the condenser, and the two ends of the return pipe are connected to the outlet of the condenser spiral tube and the bucket, respectively.

[0014] Furthermore, a gas-liquid isolation device is provided between the outlet of the condenser spiral tube and the return pipe. The gas-liquid isolation device includes a shell, a first sealing component, and a second sealing component. The shell has a first chamber, a second chamber, and a third chamber connected end to end along its axial direction. The outlet of the condenser spiral tube and the inlet of the radiator are both connected to the first chamber. The end of the return pipe away from the bucket is connected to the third chamber. The first sealing component is located inside the shell and is used to change the closed state between the first chamber and the second chamber from a closed state to an open state under the action of a first preset pressure. The second sealing component is located inside the shell and is used to change the closed state between the second chamber and the third chamber from a closed state to an open state under the action of a second preset pressure. The first preset pressure is less than the second preset pressure.

[0015] Furthermore, the first sealing assembly includes a first fixing ring and a first sealing cover. The first fixing ring is fixed between the first chamber and the second chamber. The first sealing cover is located in the second chamber and its size is larger than that of the first fixing ring. A first shaft is provided on the side of the first sealing cover facing the first chamber. The first shaft is slidably disposed on the first fixing ring. A detachable first constant force rebound member is provided between the first shaft and the first fixing ring to provide a rebound force consistent with the first preset pressure.

[0016] Furthermore, the second sealing assembly includes a second fixing ring and a second sealing cover. The second fixing ring is fixedly connected to the third chamber, and the second sealing cover is located in the third chamber and its size is larger than the size of the opening connecting the second chamber and the third chamber. A second shaft is provided on the side of the second sealing cover facing the third chamber. The second shaft is slidably disposed on the second fixing ring. A detachable second constant force rebound member is provided between the second shaft and the second fixing ring to provide a rebound force consistent with the second preset pressure.

[0017] Furthermore, the gas recovery device of the barrel-type coating machine also includes a pressure regulating valve. Each condenser box is equipped with a pressure regulating valve, which is sealed to the outlet of the condenser. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram from a first oblique perspective of an embodiment of the present invention;

[0019] Figure 2 This is a structural schematic diagram from a second oblique perspective of an embodiment of the present invention;

[0020] Figure 3 This is a front view of an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the condenser box in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the gas-liquid isolation device from the bottom view in an embodiment of the present invention;

[0023] Figure 6 This is a top-view structural schematic diagram of the gas-liquid isolation device in an embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of the gas-liquid isolation device in an embodiment of the present invention when both the first sealing component and the second sealing cover are closed.

[0025] Figure 8 This is a cross-sectional view of the gas-liquid isolation device in an embodiment of the present invention when the first sealing component is open and the second sealing cover is closed.

[0026] Figure 9 This is a cross-sectional view of the gas-liquid isolation device in this embodiment of the invention when both the first sealing component and the second sealing cover are open.

[0027] Explanation of key component symbols:

[0028] Condensing box 200, first through hole 210, exhaust fan 211, second through hole 220, condensing spiral tube 300, radiator 400, U-shaped heat dissipation tube 410, heat dissipation fins 420, condensing conduit 500, bucket 600, return pipe 700, gas-liquid isolation device 800, shell 810, first chamber 811, second chamber 812, third chamber 813, first sealing assembly 820, first fixing ring 821, first sealing cover 822, first shaft 8221, first constant force rebound member 823, second sealing assembly 830, second fixing ring 831, second sealing cover 832, second shaft 8321, second constant force rebound member 833, air pressure regulating valve 900.

[0029] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Insulating coating is a key technology in the preparation process of soft magnetic powder. The uniformity of the insulating coating layer is an important factor affecting the loss of soft magnetic powder. If the insulating coating layer is unevenly or incompletely coated, the eddy current loss of the soft magnetic powder will increase sharply, thus increasing the loss of the soft magnetic powder. At present, a dense insulating coating layer is mainly formed on the surface of the powder core through a coating machine. The heating device supporting the existing coating machine usually includes a heat preservation barrel, in which a mixture of soft magnetic powder, insulating coating agent and organic solvent is contained, and then the solvent is completely volatilized by stirring and heating at the same time. However, in order to save process costs and reduce process complexity, the volatilized organic solvent is often directly discharged, resulting in waste of resources, and some solvents may even damage the environment. Therefore, there is an urgent need to design a set of recovery equipment to recycle and reuse the volatilized organic solvent gas.

[0033] Please refer to Figures 1 to 6 , a gas recovery device for a barrel-type coating machine provided by the present invention. The heating device supporting the barrel-type coating machine includes a heat preservation barrel, and a steam outlet is provided at the top of the heat preservation barrel. The gas recovery device of the barrel-type coating machine includes a plurality of condensing boxes <200> arranged side by side, condensing spiral pipes <300>, cold rows <400>, and condensing ducts <500>. The inside of the condensing box <200> is hollow to provide a space for accommodation and air flow. The condensing spiral pipes <300> are installed in each condensing box <200>. The inlets of the condensing spiral pipes <300> are hermetically connected to the steam outlet through pipes. The condensing spiral pipes <300> include pipes tightly spirally intertwined into a spiral shape. This shape helps to increase the cooling surface area, thereby improving the condensing efficiency. During the condensation of high-temperature gas, due to the spiral structure increasing the pipe length, the contact time with the cold air in the condensing box <200> can be increased. The cold rows <400> are installed in each condensing box <200>. The inlets of the cold rows <400> are hermetically connected to the inlets of the condensing spiral pipes <300>. The two ends of the condensing duct <500> are respectively hermetically connected to the inlets of the condensing spiral pipes <300> and the outlets of the cold rows <400>. In order to condense the high-temperature gaseous organic solvent and water vapor into a liquid state, the diameter of the condensing duct <500> is smaller than the diameter of the condensing spiral pipes <300>, and the diameter of the condensing duct <500> is larger than the diameter of the flow channel in the cold rows <400>.

[0034] In this embodiment, the high-temperature gas output from the steam outlet first enters the condenser spiral tube 300 through the inlet for first-stage cooling. Because the condenser spiral tube 300 has a relatively large pipe length and width, and a large cooling surface area, a portion of the high-temperature gas can be quickly converted into a liquid state. The remaining high-temperature gas then exits through the inlet of the condenser spiral tube 300 and enters the radiator 400 through the inlet. Since the pipe width of the condenser spiral tube 300 is smaller than that of the condenser spiral tube 400, the flow rate of the high-temperature gas increases, resulting in a corresponding increase in pressure. This causes the high-temperature gas to quickly fill the space within the radiator 400. The extended length of the radiator 400 pipe results in a larger contact area with the external cold air, allowing some of the high-temperature gas inside the pipe to be rapidly converted into liquid. The remaining high-temperature gas exits from the outlet of the radiator 400 and enters the condenser duct 500 through its inlet. Since the condenser duct 500 is wider than the radiator 400, the flow velocity of the high-temperature gas decreases, causing the pressure inside the radiator 400 to exceed the gas pressure inside the condenser duct 500. This pressure facilitates the flow of condensate and high-temperature gas into the condenser duct 500, after which the condensate flows into the condenser spiral tube 300. If any remaining high-temperature gas is present, it can continue to condense along the aforementioned flow path.

[0035] To improve condensation efficiency, the airflow inside the condenser chamber 200 can be accelerated. For this purpose, in some optional embodiments, such as... Figure 1 , 2 As shown, a first through-hole 210 and a second through-hole 220 are respectively provided on the top and side wall of the condenser 200. Cold air from the atmosphere enters the condenser 200 through the second through-hole 220. An exhaust fan 211 is installed inside the first through-hole 210. When in use, the exhaust fan 211 is turned on to deliver the hot air inside the condenser 200 to the atmosphere. The airflow efficiency can be controlled by adjusting the speed of the exhaust fan 211. It is understood that multiple first through-holes 210 and second through-holes 220 can be provided, but their positions need to be rationally arranged to ensure that the flow channels inside the condenser 200 are conducive to the condensation process.

[0036] The radiator 400, as a key component of the second-stage condensation process, plays a crucial role in improving condensation efficiency. In some optional embodiments, such as... Figure 1As shown, the radiator 400 includes multiple U-shaped heat dissipation pipes 410 connected end-to-end and heat dissipation fins 420. The series connection of the U-shaped heat dissipation pipes 410 allows for a longer pipe length within a limited volume, thereby increasing the contact area with the cold air inside the condenser 200 and improving condensation efficiency. Furthermore, to further increase the cooling contact area, the U-shaped heat dissipation pipes 410 are inserted into and fixed within the heat dissipation fins 420. This arrangement also increases the stability of the U-shaped heat dissipation pipes 410 installation.

[0037] The layout of the condensing equipment within the condensing chamber 200 also significantly impacts condensing efficiency. An improper layout can hinder the proper flow of hot and cold air within the chamber, preventing the complete removal of hot air and ensuring adequate contact between the cold air and the condensing equipment. It should be noted that the condensing equipment refers to the condensing spiral tube 300, the radiator 400, and the condensing conduit 500. Therefore, in some optional embodiments, such as... Figure 4 As shown, the radiator 400 is arranged around the side wall of the condenser box 200, which saves space and facilitates air circulation in its central space. The condenser spiral tube 300 is fixedly installed on the inner bottom wall of the condenser box 200, preferably partially surrounded by the radiator 400, so that the condenser spiral tube 300 can be moved from one side of the radiator 400, making it easy to install and remove. In addition, the inlet of the condenser spiral tube 300 is higher than its outlet, so that when there is liquid in the condenser spiral tube 300, it can prevent the liquid from blocking its inlet and ensure the continuous condensation process; at the same time, the outlet of the condenser spiral tube 300 is flush with the inlet of the radiator 400, which can shorten the length of the connecting pipe between the two and reduce the pressure loss caused by the height difference.

[0038] In some alternative embodiments, such as Figure 3 As shown, the outlet height of the radiator 400 is greater than its inlet and higher than the inlet of the condenser spiral tube 300. Since the outlet of the condenser spiral tube 300 is flush with the inlet of the radiator 400, when collecting liquid through the outlet of the condenser spiral tube 300, it can be ensured that all the liquid in the radiator 400 pipe can flow into the collection device through the outlet of the condenser spiral tube 300. Furthermore, because the outlet height of the radiator 400 is higher than the inlet of the condenser spiral tube 300, the condenser conduit 500 installed between them is at an angle, which facilitates the smooth flow of condensed liquid into the condenser spiral tube 300 under gravity. This ensures that even when the pressure difference between the radiator 400 pipe and the condenser conduit 500 is small, the condensed liquid can still flow smoothly into the condenser spiral tube 300 for storage.

[0039] To facilitate the collection of the condensed liquid, in some optional embodiments, such as Figure 1-3 As shown, the gas recovery device of the barrel-type coating machine also includes a bucket 600 and a return pipe 700. The bucket 600 is installed on the outside of the bottom wall of the condenser 200, that is, its height is smaller than the aforementioned condensation equipment. The two ends of the return pipe 700 are respectively connected to the outlet of the condenser spiral tube 200 and the inlet of the bucket 600.

[0040] During continuous condensation, in order to promptly collect the liquid stored in the condenser spiral tube 300 into the hopper 600, and to prevent high-temperature gas from entering the hopper 600 through the return pipe 700, in some optional embodiments, such as... Figure 1 , 3 As shown in Figures 4 and 5-9, a gas-liquid isolation device 800 is provided between the outlet of the condenser spiral tube 300 and the return tube 700.

[0041] Specifically, the gas-liquid isolation device 800 includes a housing 810, a first sealing assembly 820, and a second sealing assembly 830. The housing 810 is provided with a first chamber 811, a second chamber 812, and a third chamber 813 from top to bottom, and the first chamber 811, the second chamber 812, and the third chamber 813 are connected in series. During assembly, the opening at the top of the first chamber 811 is sealed to the outlet of the condenser spiral tube 300, and the opening on the side wall of the first chamber 811 is sealed to the inlet of the radiator 400. Optionally, the sealing connection can be a threaded connection. In order to ensure a certain degree of sealing, an O-ring can be provided at the connection. The opening at the end of the return pipe 700 away from the bucket 600 is sealed to the opening at the bottom of the third chamber 813. The first sealing assembly 820 is disposed within the housing 810. In the initial state, the first sealing assembly 820 closes the connection between the first chamber 811 and the second chamber 812. When the force generated by the high-temperature gas and the condensed liquid in the first chamber 811 (denoted as the first preset pressure) reaches a certain magnitude, the first sealing assembly 820 opens the connection between the first chamber 811 and the second chamber 812. The second sealing assembly 830 is disposed within the housing 810. In the initial state, the second sealing assembly 830 closes the connection between the second chamber 812 and the third chamber 813. When the sum of the force generated by the high-temperature gas and the condensed liquid in the second chamber 812 and the force generated by the first sealing assembly 820 (denoted as the second preset pressure) reaches a certain magnitude, the second sealing assembly 830 opens the connection between the second chamber 812 and the third chamber 813. The first preset pressure is less than the second preset pressure.

[0042] In this embodiment, after the first sealing component 820 is opened, liquid and high-temperature gas simultaneously enter the second chamber 812. The first preset pressure is set to be lower than the second preset pressure. At this time, the second sealing component 830 is not opened, and the liquid is temporarily stored in the second chamber 812, acting as a gas separator. Simultaneously, with the continuous input of liquid, since the space size within the second chamber 812 is constant, the liquid level will continuously rise, expelling some gas. When the force acting on the second sealing component 830 increases to a certain value, the second sealing component 830 opens, and the liquid slowly flows from the second chamber 812 into the third chamber 813. By reasonably setting the opening degree of the first sealing component 820 and the second sealing component 830, a certain liquid level can still be maintained in the second chamber 812, thereby preventing gas from entering the third chamber 813.

[0043] In some alternative embodiments, such as Figure 5-9 As shown, the first sealing assembly 820 includes a first fixing ring 821 and a first sealing cover 822. The first fixing ring 821 is fixed between the first chamber 811 and the second chamber 812. The first sealing cover 822 is located inside the second chamber 812 and its size is larger than that of the first fixing ring 821. Thus, when a seal is required between the first chamber 811 and the second chamber 812, the first sealing cover 822 can completely cover the hollow area in the middle of the first fixing ring 821. A first shaft 8221 is provided on the side of the first sealing cover 822 facing the first chamber 812. The first shaft 8221 is slidably disposed on the first fixing ring 821. By moving the first shaft 8221 up and down relative to the first fixing ring 821, the hollow area in the middle of the first fixing ring 821 can be opened and closed, thereby achieving the purpose of opening and closing the communication between the first chamber 811 and the second chamber 812. A detachable first constant-force rebound member 823 is provided between the first shaft 8221 and the first fixed ring 821 to provide a rebound force consistent with the first preset pressure. Thus, when the force exerted on the upper surface of the first sealing cover 822 by the high-temperature gas and liquid in the first chamber 811 exceeds this rebound force, the first sealing cover 822 is pushed downwards; when the force is less than the rebound force, the first sealing cover 822 moves upwards under the action of the rebound force. Optionally, in this embodiment, the first constant-force rebound member 823 is a constant-force spring, which has a constant elastic restoring force regardless of expansion or contraction.

[0044] The first constant force rebound member 823 is detachable, which allows for easy disassembly of the first constant force rebound member 823 when the gas pressure is low or after the condensation process has stopped, thereby enabling communication between the first chamber 811 and the second chamber 812.

[0045] The second sealing assembly 830 includes a second fixing ring 831 and a second sealing cover 832. The second fixing ring 831 is fixedly connected to the third chamber 813. The second sealing cover 832 is located in the third chamber 813 and its size is larger than the size of the opening between the second chamber 812 and the third chamber 813. In this way, when the second chamber 812 and the third chamber 813 need to be sealed, the second sealing cover 832 can completely cover the hollow area between the second chamber 812 and the third chamber 813. The second sealing cover 832 is provided with a second shaft 8321 on the side facing the third chamber 813. The second shaft 8321 is slidably mounted on the second fixed ring 831. A detachable second constant force rebound member 833 is provided between the second shaft 8321 and the second fixed ring 831. When the upper end surface of the second sealing cover 832 is subjected to a force greater than the rebound force from the high temperature gas, liquid, and the first shaft 8221 in the second chamber 812, the second sealing cover 832 is pushed to move downward. When the force is less than the rebound force, the second sealing cover 832 moves upward under the action of the rebound force.

[0046] The second constant force rebound member 833 can be detached when the gas pressure is low or after the condensation process has stopped, thereby connecting the second chamber 812 and the third chamber 813.

[0047] When the force exerted by the liquid and high-temperature gas in the first chamber 811 on the first sealing cover 822 is greater than the rebound force of the first constant force rebound member 823, the first sealing cover 822 opens, and the liquid and high-temperature gas simultaneously enter the second chamber 812. Since the rebound force of the first constant force rebound member 823 is less than the rebound force of the second constant force rebound member 833, the second sealing cover 832 is not opened at this time, and the liquid is temporarily stored in the second chamber 812. The liquid can play the role of isolating the gas. As liquid continues to be input into the second chamber 812, the liquid level will continue to rise and some gas will be discharged because the space size of the second chamber 812 is constant. At the same time, as the amount of condensed liquid increases, the space occupied by the high-temperature gas decreases, and the pressure generated by the high-temperature gas also increases. As a result, the protrusion at the bottom of the first sealing cover 822 will move downward until it abuts against the second sealing cover 832. When the force acting on the second sealing cover 832 (this force includes the gravity of the liquid, the pressure of the continuously input high-temperature gas, and the pushing action of the protrusion at the bottom of the first sealing cover 822) is greater than the rebound force of the second constant force rebound member 833, the second sealing cover 832 opens, and the liquid slowly flows from the second chamber 812 into the third chamber 813. By reasonably setting the opening degree of the first sealing component 820 and the second sealing component 830, a certain liquid level can still be maintained in the second chamber 812 at this time, thereby preventing gas from entering the third chamber 813.

[0048] In some alternative embodiments, such as Figure 1-4 As shown, the gas recovery device of the barrel-type coating machine also includes a pressure regulating valve 900. Each condenser box 200 is equipped with a pressure regulating valve 900, which is sealed to the outlet of the condenser 400. By setting the pressure regulating valve 900, the gas can be discharged to the atmosphere when the high temperature gas pressure is too high, preventing excessive gas pressure from damaging the condensing equipment.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gas recovery device for a barrel-type coating machine, applied in the heating device of the barrel-type coating machine, wherein the heating device of the barrel-type coating machine includes a heat preservation tank, the heat preservation tank being provided with a steam outlet, characterized in that, The gas recovery device of the barrel-type coating machine includes: At least one condenser box; A condensing spiral tube is installed in each of the condensing boxes, and the inlet of each condensing spiral tube is sealed to the steam outlet. A radiator is provided in each of the condenser boxes, and its inlet is sealed to the inlet of the condenser spiral tube; A condenser conduit, the two ends of which are sealed and connected to the inlet of the condenser spiral tube and the outlet of the radiator, respectively; Wherein, the diameter of the condenser conduit is smaller than the diameter of the condenser spiral tube, and the diameter of the condenser conduit is larger than the diameter of the flow channel of the radiator; The top and sides of the condenser are respectively provided with a first through hole and a second through hole. The second through hole is used to allow cold air from the atmosphere to enter the condenser. An exhaust fan is provided in the first through hole. The exhaust fan is used to transfer the hot air in the condenser to the atmosphere. The radiator includes multiple U-shaped heat pipes and heat dissipation fins connected in series. The U-shaped heat pipes are inserted into the heat dissipation fins, and the multiple U-shaped heat pipes form the flow channels of the radiator. The radiator is arranged around the inner periphery of the condenser box, and the condenser spiral tube is located on the inner bottom wall of the condenser box and partially surrounded by the radiator. The inlet of the condenser spiral tube is higher than its outlet, and the outlet of the condenser spiral tube is flush with the inlet of the radiator.

2. The gas recovery device of the barrel-type coating machine according to claim 1, characterized in that, The outlet of the radiator is higher than its inlet and also higher than the inlet of the condenser spiral tube.

3. The gas recovery device of the barrel-type coating machine according to claim 2, characterized in that, The gas recovery device of the barrel-type coating machine also includes a bucket and a return pipe. The bucket is located on the outside of the bottom wall of the condenser box, and the two ends of the return pipe are respectively connected to the outlet of the condenser spiral tube and the bucket.

4. The gas recovery device of the barrel-type coating machine according to claim 3, characterized in that, A gas-liquid isolation device is provided between the outlet of the condenser spiral tube and the return tube, the gas-liquid isolation device comprising: The shell has a first chamber, a second chamber, and a third chamber connected end to end along its axial direction. The outlet of the condenser spiral tube and the inlet of the radiator are both connected to the first chamber, and the end of the return pipe away from the bucket is connected to the third chamber. A first sealing assembly is disposed within the housing and is used to change the relationship between the first chamber and the second chamber from a closed state to an open state under a first preset pressure. The second sealing assembly is disposed inside the housing and is used to change the relationship between the second chamber and the third chamber from a closed state to an open state under the action of a second preset pressure; Wherein, the first preset pressure is less than the second preset pressure.

5. The gas recovery device of the barrel-type coating machine according to claim 4, characterized in that, The first sealing assembly includes a first fixing ring and a first sealing cover. The first fixing ring is fixed between the first chamber and the second chamber. The first sealing cover is located in the second chamber and its size is larger than that of the first fixing ring. A first shaft is provided on the side of the first sealing cover facing the first chamber. The first shaft is slidably disposed on the first fixing ring. A detachable first constant force rebound member is provided between the first shaft and the first fixing ring to provide a rebound force consistent with the first preset pressure.

6. The gas recovery device of the barrel-type coating machine according to claim 4, characterized in that, The second sealing assembly includes a second retaining ring and a second sealing cap. The second retaining ring is fixedly connected to the third chamber. The second sealing cap is located in the third chamber and its size is larger than the size of the opening connecting the second chamber and the third chamber. A second shaft is provided on the side of the second sealing cap facing the third chamber, and the second shaft is slidably disposed on the second retaining ring. A detachable second constant force rebound member is provided between the second shaft and the second retaining ring to provide a rebound force consistent with the second preset pressure.

7. The gas recovery device for the barrel-type coating machine according to any one of claims 1 to 6, characterized in that, The gas recovery device of the barrel-type coating machine also includes a pressure regulating valve. Each of the condenser boxes is equipped with a pressure regulating valve, which is sealed to the outlet of the condenser.

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