Cleaning kettle and supercritical fluid cleaning system

Abstract

The invention provides a cleaning kettle and a cleaning system adopting supercritical fluid, relates to the technical field of industrial cleaning, and solves the technical problem that a reaction kettle capable of using supercritical carbon dioxide as a solvent to clean a large number of parts is lacked in the prior art. The device comprises a kettle body, a kettle cover, a rotating structure and a workpiece table, an opening of the kettle body is detachably connected with the kettle cover in a sealed mode, the rotating structure is located in the kettle body and can rotate in the kettle body, and the workpiece table is placed on the rotating structure and can be pushed by the rotating structure to rotate; a plurality of workpiece positioning parts are arranged on the workpiece table, an inlet and an outlet are formed in the kettle body, and a pressure detection port is formed in the kettle cover.

Description

Technical Field

[0001] The invention relates to the technical field of industrial cleaning, in particular to a cleaning kettle and a cleaning system using a supercritical fluid. Background Art

[0002] At present, traditional cleaning methods such as ultrasonic cleaning and jet cleaning can effectively clean traditional parts. However, due to the large surface tension of traditional cleaning media, they are affected by capillary forces and cannot enter the micropores and slits of precision parts to effectively clean them, which in turn affects the processing and use of precision parts. Supercritical carbon dioxide has a surface tension of approximately zero, which can overcome capillary forces, penetrate into the micropores and slits of precision parts, and effectively clean them. At the same time, the strong solubility and high diffusivity of supercritical fluids can ensure the cleaning effect and fundamentally avoid the generation of sewage. However, in the prior art, there is a lack of a reactor that can use supercritical carbon dioxide as a solvent to clean a large number of parts. Summary of the invention

[0003] The object of the present invention is to provide a cleaning kettle and a cleaning system using supercritical fluid to solve the technical problem that there is no prior art that can use supercritical carbon dioxide as a solvent to clean a large number of parts in a reactor. The preferred technical solutions among the many technical solutions provided by the present invention can produce a variety of technical effects as described below.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A cleaning kettle provided by the present invention comprises a kettle body, a kettle cover, a rotating structure and a workpiece table, wherein the opening of the kettle body is detachably sealed and connected to the kettle cover, the rotating structure is located in the kettle body and can rotate in the kettle body, the workpiece table is placed on the rotating structure and can drive the workpiece table to rotate;

[0006] The workpiece table is provided with a plurality of workpiece positioning parts, the kettle body is provided with an inlet and an outlet, and the kettle cover is provided with a pressure detection port.

[0007] Optionally, it also includes a driving device, a transmission device and a sealing shell, the sealing shell is fixedly connected to the side wall of the kettle body and the interior of the sealing shell is communicated with the interior of the kettle body, the transmission device is located in the sealing shell, the outer shell of the driving device is connected to the sealing shell, the output shaft of the driving device extends into the sealing shell and is connected to the transmission device, and the transmission device is connected to the rotating structure.

[0008] Optionally, the transmission device includes at least one gear, and the gear is meshingly connected to the rotating structure.

[0009] Optionally, the rotating structure includes a gear plate, a supporting wheel and a clamping portion, the supporting wheel is connected to a supporting step inside the kettle body via a connecting shaft, there are multiple supporting wheels and all of the supporting wheels are distributed along the circumferential direction of the kettle body, the gear plate is in contact with the supporting wheel, the gear plate is meshingly connected to the transmission device, the clamping portion is fixedly connected to the upper end surface of the gear plate, and the clamping portion is clamped to the workpiece table.

[0010] Optionally, an annular strip and a plurality of fixed teeth are provided on the circumferential side wall of the gear plate, the fixed teeth are located above the annular strip, the fixed teeth are meshedly connected with the transmission device, and the outer side wall of the annular strip is in contact with the outer wall of the supporting wheel;

[0011] The outer side wall of the annular strip is an inverted cone structure, and the supporting wheel is a cone structure.

[0012] Optionally, the clamping portion includes a positioning cone and a positioning strip, the positioning cone is fixedly connected to the center of the gear plate, the positioning strip is fixedly connected to the upper end surface of the gear plate and the length direction of the positioning strip is consistent with the radial direction of the gear plate, there are multiple positioning strips, and all of the positioning strips are distributed along the circumferential direction of the gear plate.

[0013] Optionally, the workpiece platform includes a frustum body and a lifting ear, the lifting ear is fixedly connected to the upper end of the frustum body, the workpiece positioning portion is connected to the side wall of the frustum body, the lower end surface of the frustum body is provided with a plurality of positioning grooves, and a positioning hole is provided at the center of the frustum body;

[0014] The workpiece positioning part is a magnetic attraction part.

[0015] Optionally, it further comprises a flip cover mechanism, wherein the flip cover mechanism is used to open or close the kettle cover;

[0016] The number of the flip cover mechanisms is two;

[0017] The flip cover mechanism includes a support, a hydraulic cylinder and a support arm. The support is fixedly connected to the side wall of the kettle body, the lower end of the hydraulic cylinder is rotatably connected to the lower end of the support, the upper end of the hydraulic cylinder is rotatably connected to one end of the support arm, the upper end of the support is rotatably connected to the end of the support arm, and the other end of the support arm is fixedly connected to the kettle cover.

[0018] Optionally, a sealing structure is further included, wherein the sealing structure is used to seal the flange connection between the kettle cover and the kettle body;

[0019] The number of the sealing structures is two;

[0020] The sealing structure comprises a sealing hoop, a connecting rod, a hoop support, a hydraulic cylinder push rod, a double-acting hydraulic cylinder, a C-type sealing ring and an O-type sealing ring. The number of the sealing hoop, the connecting rod, the hoop support and the hydraulic cylinder push rod is two. The hoop support is fixedly connected to the kettle body, the middle part of the sealing hoop is rotatably connected to one end of the connecting rod, the end of the double-acting hydraulic cylinder is rotatably connected to one end of the hydraulic cylinder push rod, the other end of the connecting rod, the hoop support and the other end of the hydraulic cylinder push rod are connected by a connecting piece, and the connecting piece is rotatably connected to the hoop support, the C-type sealing ring is located on the inner side of the flange connection, and the O-type sealing ring is located in the middle of the flange connection;

[0021] The sealing clamp is provided with a notch groove.

[0022] The present invention provides a cleaning system using supercritical fluid, comprising a storage tank, a compressor, a heat exchange component, a pressure reducing valve, a gasification kettle and a cleaning kettle, wherein the outlet of the storage tank is connected to the inlet of the compressor through a first pipeline, the outlet of the compressor is connected to the inlet (11) of the cleaning kettle through a second pipeline, the second pipeline passes through the heating end of the heat exchange component, the discharge port (12) of the cleaning kettle is connected to the inlet of the pressure reducing valve through a third pipeline, the outlet of the pressure reducing valve is connected to the inlet of the gasification kettle through a fourth pipeline, the gas outlet of the gasification kettle is connected to the inlet of the storage tank through a fifth pipeline, and the fifth pipeline passes through the cooling end of the heat exchange component;

[0023] The branch of the second pipeline is connected to the first branch of the fifth pipeline through the sixth pipeline, and the branch of the first pipeline is connected to the second branch of the fifth pipeline through the seventh pipeline;

[0024] The first pipeline is provided with a first valve, the seventh pipeline is provided with a second valve, the second pipeline is provided with a third valve, the sixth pipeline is provided with a fourth valve, and the fifth pipeline is provided with a fifth valve.

[0025] The present invention provides a cleaning kettle, in which supercritical carbon dioxide is introduced into the kettle body through an inlet, and a plurality of workpieces to be cleaned are placed on corresponding workpiece positioning portions. When cleaning is performed, the kettle body and the kettle cover are sealed and connected, and a rotating structure drives the workpiece table to rotate in the kettle body, so that the workpieces to be cleaned at various locations on the workpiece table can contact with the supercritical carbon dioxide, thereby achieving cleaning of a large number of workpieces, thereby solving the technical problem in the prior art of lacking a reactor that can use supercritical carbon dioxide as a solvent to clean a large number of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a front view of a cleaning kettle in a closed state provided by an embodiment of the present invention;

[0028] Figure 2 This is a front view of a cleaning kettle in an open state provided by an embodiment of the present invention;

[0029] Figure 3 yes Figure 1 Sectional view of AA in the middle;

[0030] Figure 4 is a top view of a cleaning kettle provided by an embodiment of the present invention;

[0031] Figure 5 yes Figure 4 Cross-sectional view of the middle BB;

[0032] Figure 6 yes Figure 5 Partial diagram of C in the middle;

[0033] Figure 7 The present invention provides a flow chart of a supercritical fluid cleaning system.

[0034] In the figure, 1 is a kettle body; 11 is an inlet; 12 is an outlet; 13 is a supporting step;

[0035] 2. Kettle cover; 21. Pressure detection port;

[0036] 3. Rotating structure; 31. Gear plate; 311. Ring bar; 312. Fixed tooth; 32. Support wheel; 33. Positioning cone; 34. Positioning bar;

[0037] 4. Workpiece table; 41. Workpiece positioning portion; 42. Cone body; 421. Positioning hole; 43. Lifting ear;

[0038] 5. Driving device;

[0039] 6. Transmission device; 61. Gear;

[0040] 7. Sealing shell;

[0041] 8. Flip mechanism; 81. Support; 82. Hydraulic cylinder; 83. Support arm;

[0042] 9. Sealing structure; 91. Sealing clamp; 92. Connecting rod; 93. Clamp support; 94. Hydraulic cylinder push rod; 95. Double-acting hydraulic cylinder; 96. C-type sealing ring; 97. O-type sealing ring;

[0043] 10. Storage tank; 20. Compressor; 30. Pressure reducing valve; 40. Gasification kettle; 50. Cleaning kettle; 60. First pipeline; 70. Second pipeline; 80. Third pipeline; 90. Fourth pipeline; 100. Fifth pipeline; 110. Sixth pipeline; 120. Seventh pipeline; 130. First valve; 140. Second valve; 150. Third valve; 160. Fourth valve; 170. Fifth valve; 180. Heater; 190. Cooler; 200. Refrigerant compressor; 210. Expansion valve. DETAILED DESCRIPTION

[0044] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention provides a cleaning kettle, comprising a kettle body 1, a kettle cover 2, a rotating structure 3 and a workpiece table 4, wherein the opening of the kettle body 1 is detachably sealed and connected to the kettle cover 2, the rotating structure 3 is located in the kettle body 1 and can rotate in the kettle body 1, and the workpiece table 4 is placed on the rotating structure 3 and can drive the workpiece table 4 to rotate;

[0048] A plurality of workpiece positioning parts 41 are arranged on the workpiece table 4, and an inlet 11 and an outlet 12 are arranged on the kettle body 1. The inlet 11 is located on the side wall of the kettle body 1, and the outlet 12 is located at the bottom of the kettle body 1. Impurities on the workpiece to be cleaned will be discharged from the outlet 12 along with the supercritical carbon dioxide fluid. A pressure detection port 21 is arranged on the kettle cover 2 to detect the pressure of the kettle body 1. In a cleaning kettle provided by the present invention, supercritical carbon dioxide is introduced into the kettle body 1 through the inlet 11, and a plurality of workpieces to be cleaned are placed on the corresponding workpiece positioning parts 41. When cleaning, the kettle body 1 and the kettle cover 2 are sealed and connected, and the rotating structure 3 rotates in the kettle body 1 by pushing the workpiece table 4, so that the workpieces to be cleaned at various locations on the workpiece table 4 can be in contact with the supercritical carbon dioxide, thereby achieving the cleaning of a large number of workpieces, solving the technical problem in the prior art of lacking a reactor that can use supercritical carbon dioxide as a solvent to clean a large number of parts.

[0049] As an optional embodiment, it also includes a driving device 5, a transmission device 6 and a sealing shell 7, the sealing shell 7 is fixedly connected to the side wall of the kettle body 1 and the interior of the sealing shell 7 is connected to the interior of the kettle body 1, the transmission device 6 is located in the sealing shell 7, the sealing shell 7 is to maintain the sealing inside the kettle body 1, and at the same time to withstand the pressure of the supercritical fluid in the kettle body 1, reduce the friction and loss between the output shaft of the driving device 5 and the kettle body 1, and improve the efficiency of the equipment, the outer shell of the driving device 5 is connected to the sealing shell 7, the output shaft of the driving device 5 extends into the sealing shell 7 and is connected to the transmission device 6, the output shaft of the driving device 5 is sealed with the sealing shell 7, and the transmission device 6 is connected to the rotating structure 3. The driving device 5 can be a variable frequency speed regulating motor. After the driving device 5 is started, it can drive the transmission device 6 to operate, thereby driving the rotating structure 3 to move, and finally rotating the workpiece table 4.

[0050] The kettle body 1 comprises a cylindrical body and a semi-elliptical head, which are welded together. The diameter of the cylindrical body is larger than the diameter of the semi-elliptical head, and a support step 13 is formed at the connection between the cylindrical body and the semi-elliptical head.

[0051] As an optional embodiment, the transmission device 6 includes at least one gear 61, which is meshed with the rotating structure 3, and the two gears 61 are meshed with each other. By changing the speed ratio of the two gears 61, the torque transmitted to the gear plate 31 can be adjusted. The rotating structure 3 includes a gear plate 31, a supporting wheel 32 and a clamping portion. The supporting wheel 32 is connected to the supporting step 13 in the kettle body 1 through a connecting shaft. The number of supporting wheels 32 is multiple and all supporting wheels 32 are distributed along the circumferential direction of the kettle body 1. The gear plate 31 is in contact with the supporting wheel 32, and the supporting wheel 32 is used to support the gear plate 31. The gear plate 31 is meshed with the transmission device 6, and the clamping portion is fixedly connected to the upper end surface of the gear plate 31, and the clamping portion is clamped with the workpiece table 4. After the driving device 5 is started, it will drive the gear 61 to rotate, thereby driving the gear plate 31 to rotate, and the workpiece table 4 is rotated through the clamping portion.

[0052] As an optional embodiment, an annular strip 311 and a plurality of fixed teeth 312 are provided on the circumferential side wall of the gear plate 31, the fixed teeth 312 are located above the annular strip 311, the fixed teeth 312 are meshed and connected with the gear 61, and the outer side wall of the annular strip 311 is in contact with the outer wall of the supporting wheel 32;

[0053] The outer wall of the annular strip 311 is an inverted conical structure, the supporting wheel 32 is a conical structure, and the taper ratio between the annular strip 311 and the supporting wheel 32 is 1:3 to 10. The gear plate 31 can automatically adjust the dynamic balance. The gear plate 31 is supported and limited by the conical supporting wheel 32. During operation, the contact angle with the conical supporting wheel 32 is continuously adjusted to keep the balance of the gear plate 31.

[0054] As an optional embodiment, the clamping portion includes a positioning cone 33 and a positioning bar 34, the positioning cone 33 is fixedly connected to the center of the gear plate 31, the positioning bar 34 is fixedly connected to the upper end surface of the gear plate 31 and the length direction of the positioning bar 34 is consistent with the radial direction of the gear plate 31, there are multiple positioning bars 34, and all positioning bars 34 are distributed along the circumferential direction of the gear plate 31.

[0055] As an optional implementation, the workpiece table 4 includes a frustum main body 42 and a lifting ear 43, the lifting ear 43 is fixedly connected to the upper end of the frustum main body 42, the lifting ear 43 is for facilitating the lifting operation of the workpiece table 4, and is used for loading and unloading the workpiece table 4, the workpiece positioning portion 41 is connected to the side wall of the frustum main body 42, and the lower end surface of the frustum main body 42 is provided with a plurality of positioning grooves, and the positioning grooves correspond one-to-one to the positioning strips 34, the positioning strips 34 extend into the positioning grooves and the two are clamped together, and a positioning hole 421 is provided at the center of the frustum main body 42, and the positioning cone 33 is inserted into the positioning hole 421.

[0056] As an optional implementation, the workpiece positioning part 41 is a magnetic attraction member, which can be a super-strong permanent magnetic chuck for fixing the workpiece to be cleaned. The super-strong permanent magnetic chuck is used to fix the workpiece to be processed quickly and without damage; the workpiece to be cleaned is arranged and assembled outside the kettle, which greatly improves the operating efficiency of the extraction kettle.

[0057] The cone body 42 is a polygonal regular pyramid or a circular truncated pyramid. The cone body 42 is a polygonal regular pyramid, the number of sides of the regular pyramid should be an even number, and super-strong permanent magnetic chucks of different specifications are installed according to the side size of the regular pyramid to fix the workpiece to be processed.

[0058] As an optional embodiment, it further comprises a lid-turning mechanism 8, which is used to open or close the kettle cover 2;

[0059] There are two flip cover mechanisms 8, and the two flip cover mechanisms 8 are located on the same side of the kettle cover 2;

[0060] The flip cover mechanism 8 includes a support 81, a hydraulic cylinder 82 and a support arm 83. The support 81 is fixedly connected to the side wall of the kettle body 1, the lower end of the hydraulic cylinder 82 is rotatably connected to the lower end of the support 81, the upper end of the hydraulic cylinder 82 is rotatably connected to one end of the support arm 83, the upper end of the support 81 is rotatably connected to the end of the support arm 83, and the other end of the support arm 83 is fixedly connected to the kettle cover 2. The support 81, the hydraulic cylinder 82 and the support arm 83 can form a four-bar structure. When the hydraulic cylinder 82 extends or retracts, the support arm 83 will swing, thereby driving the kettle cover 2 to flip, thereby realizing the operation of opening or closing the kettle cover 2.

[0061] As an optional embodiment, a sealing structure 9 is further included, and the sealing structure 9 is used to seal the flange connection between the kettle cover 2 and the kettle body 1;

[0062] The number of sealing structures 9 is two;

[0063] The sealing structure 9 includes a sealing hoop 91, a connecting rod 92, a hoop support 93, a hydraulic cylinder push rod 94, a double-acting hydraulic cylinder 95, a C-type sealing ring 96 and an O-type sealing ring 97. The number of the sealing hoop 91, the connecting rod 92, the hoop support 93 and the hydraulic cylinder push rod 94 is two. The two sealing hoops 91, the two connecting rods 92, the two hoop supports 93 and the two hydraulic cylinder push rods 94 are respectively located on both sides of the double-acting hydraulic cylinder 95. The hoop support 93 is fixedly connected to the kettle body 1, and the middle part of the sealing hoop 91 is rotatably connected to one end of the connecting rod 92. The end of the hydraulic cylinder 95 is rotatably connected to one end of the hydraulic cylinder push rod 94, the other end of the connecting rod 92, the hoop support 93 and the other end of the hydraulic cylinder push rod 94 are connected through a connecting piece, and the connecting piece is rotatably connected to the hoop support 93, the C-type sealing ring 96 is located on the inner side of the flange connection, and the O-type sealing ring 97 is located in the middle of the flange connection; when the double-acting hydraulic cylinder 95 is extended or retracted, it will push the hydraulic cylinder push rod 94 to move, thereby driving the hoop support 93 to move, so that the sealing hoop 91 is close to the flange connection or away from the flange connection. A notch groove is set on the sealing hoop 91, and the hoop support 93 is made of high-strength steel material, and the flange connection will be inserted into the notch groove.

[0064] The C-type sealing ring 96 and the O-type sealing ring 97 jointly bear the pressure of the supercritical fluid in the kettle body 1, the C-type sealing ring 96 plays the main sealing task, and the O-type sealing ring 97 plays a safety role;

[0065] The C-type sealing ring 96 is a metal seal. Compared with non-metallic seals such as rubber or plastic, the metal seal will not creep due to long-term stress and has stable chemical properties.

[0066] A C-ring 96 and an O-ring 97 are used for quick-release sealing of high-pressure containers. The cross-section of the C-ring 96 is "C"-shaped, with two flat boss sealing surfaces on both sides. When the flange connection is subjected to the force of the sealing hoop 91, the top and bottom of the C-ring 96 are squeezed to form an initial seal. When the pressure in the kettle body 1 continues to rise, the inner wall of the opening of the C-ring 96 is deformed by the pressure, pushing the outer wall of the opening to fit with the C-ring base (kettle body flange) to form a working seal.

[0067] The present invention provides a cleaning system using a supercritical fluid, comprising a storage tank 10, a compressor 20, a heat exchange component, a pressure reducing valve 30, a gasification kettle 40 and a cleaning kettle 50, wherein the outlet of the storage tank 10 is connected to the inlet of the compressor 20 through a first pipeline 60, the outlet of the compressor 20 is connected to the inlet 11 of the cleaning kettle 50 through a second pipeline 70, the second pipeline 70 passes through the heating end of the heat exchange component, the discharge port 12 of the cleaning kettle 50 is connected to the inlet of the pressure reducing valve 30 through a third pipeline 80, the outlet of the pressure reducing valve 30 is connected to the inlet of the gasification kettle 40 through a fourth pipeline 90, the gas outlet of the gasification kettle 40 is connected to the inlet of the storage tank 10 through a fifth pipeline 100, and the fifth pipeline 100 passes through the refrigeration end of the heat exchange component;

[0068] The heat exchange assembly includes a heater 180, a cooler 190, a refrigerant compressor 200 and an expansion valve 210. The heater 180, the expansion valve 210, the cooler 190 and the refrigerant compressor 200 are cyclically connected in sequence. The second pipeline 70 passes through the heater 180, and the fifth pipeline 100 passes through the cooler 190.

[0069] The branch of the second pipeline 70 is connected to the first branch of the fifth pipeline 100 through the sixth pipeline 110, and the branch of the first pipeline 60 is connected to the second branch of the fifth pipeline 100 through the seventh pipeline 120;

[0070] The first pipeline 60 is provided with a first valve 130 , the seventh pipeline 120 is provided with a second valve 140 , the second pipeline 70 is provided with a third valve 150 , the sixth pipeline 110 is provided with a fourth valve 160 , and the fifth pipeline 100 is provided with a fifth valve 170 .

[0071] The present invention adopts a supercritical fluid cleaning system to perform cleaning operation process:

[0072] First, the first valve 130, the third valve 150 and the fifth valve 170 are in an open state, and the second valve 140 and the fourth valve 160 are in a closed state;

[0073] After the low-pressure carbon dioxide in the storage tank 10 is pressurized by the compressor 20, the high-pressure carbon dioxide is heated to the process set temperature by the heater 180 and enters the cleaning kettle 50. The high-pressure carbon dioxide fluid contacts the workpiece on the workpiece table 4 in the cleaning kettle 50. By utilizing the characteristics of CO2 molecules such as symmetrical structure and very small polarity, the impurities washed off the surface of the workpiece are discharged from the cleaning kettle 50 along with the carbon dioxide fluid. After the carbon dioxide fluid is depressurized by the pressure reducing valve 30, the separation of carbon dioxide and impurities is achieved in the gasification kettle 40.

[0074] The gasified carbon dioxide is cooled and liquefied in the cooler 190, and the liquid carbon dioxide returns to the storage tank 10 for recycling.

[0075] The heater 180, the cooler 190, the refrigerant compressor 200 and the expansion valve 210 together constitute a heat exchange system. The refrigerant (refrigerant) in the system is compressed by the refrigerant compressor 200 into a high-temperature and high-pressure liquid, and indirectly exchanges heat with the carbon dioxide in the heater 180. The pressure of the cooled refrigerant is reduced under the flow limiting effect of the expansion valve 210. The refrigerant vaporizes in the cooler 190 and absorbs the heat of the carbon dioxide discharged from the gasifier 40 during vaporization and enters the refrigerant compressor 200. This cycle achieves heat balance without the need for an additional heat source and achieves control of the temperature of the carbon dioxide. By adjusting the operating speed of the refrigerant compressor 200 and the opening of the expansion valve 210, the operating temperature of the heater 180 can be controlled.

[0076] Carbon dioxide recovery

[0077] After the cleaning kettle 50 completes the cleaning task, the first valve 130 , the third valve 150 and the fifth valve 170 are closed, the second valve 140 and the fourth valve 160 are opened, and the cleaning kettle 50 and the gasification kettle 40 are evacuated by the compressor 20 to recover all the carbon dioxide in the system into the storage tank 10 .

[0078] Supercritical fluid is a high-density gas, that is, the pressure is greater than that of gas, close to that of liquid, and the viscosity is similar to that of gas. The diffusion coefficient is close to that of gas, about 10100 times that of liquid, so it has better fluidity and transmission properties.

[0079] Using supercritical carbon dioxide as solvent and reaction medium has the following advantages:

[0080] 1. Supercritical carbon dioxide is used as solvent and reaction medium. Compared with organic reagents, supercritical carbon dioxide is non-toxic, flame retardant, has no solvent residue, is safe and cheap, and does not pollute the environment;

[0081] 2. Use supercritical carbon dioxide as solvent and reaction medium. Compared with water, CO2 molecules have a symmetrical structure and low polarity. According to the principle of like dissolves like, it can dissolve non-polar or low-polar organic matter that water cannot dissolve. It can be used as a solvent for organic reactions to dissolve fat-soluble reactants and products in it while maintaining the homogeneity of the reaction.

[0082] 3. Supercritical carbon dioxide is used as solvent and reaction medium. Compared with water, it can clean workpieces with complex geometric structures, operate at room temperature, and does not require additional drying time.

[0083] 4. Add co-solvents to supercritical carbon dioxide to increase the solubility of solutes (dirt on the workpiece surface) in supercritical carbon dioxide, or add co-solvents in a targeted manner to solve the problem of single supercritical carbon dioxide being unable to process workpieces, thus solving the problem of water-based solvents being used in a single scenario;

[0084] 5. It can be applied to the dissolution conditions of various solutes by adjusting the temperature and pressure of supercritical carbon dioxide;

[0085] Supercritical carbon dioxide is not only a solvent, but also provides an inert environment for the reaction. It can also be recycled, saving energy and resources.

[0086] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A cleaning kettle, characterized in that: It comprises a kettle body (1), a kettle cover (2), a rotating structure (3) and a workpiece table (4), wherein: The opening of the kettle body (1) is detachably sealed to the kettle cover (2); the rotating structure (3) is located in the kettle body (1) and can rotate in the kettle body (1); the workpiece table (4) is placed on the rotating structure (3) and can drive the workpiece table (4) to rotate; The workpiece platform (4) is provided with a plurality of workpiece positioning parts (41), the kettle body (1) is provided with an inlet (11) and an outlet (12), and the kettle cover (2) is provided with a pressure detection port (21).

2. A cleaning kettle according to claim 1, characterized in that: The invention also comprises a driving device (5), a transmission device (6) and a sealing shell (7); the sealing shell (7) is fixedly connected to the side wall of the kettle body (1) and the interior of the sealing shell (7) is communicated with the interior of the kettle body (1); the transmission device (6) is located in the sealing shell (7); the outer shell of the driving device (5) is connected to the sealing shell (7); the output shaft of the driving device (5) extends into the sealing shell (7) and is connected to the transmission device (6); and the transmission device (6) is connected to the rotating structure (3).

3. A cleaning kettle according to claim 2, characterized in that: The transmission device (6) comprises at least one gear (61), and the gear (61) is meshingly connected with the rotating structure (3).

4. A cleaning kettle according to claim 2, characterized in that: The rotating structure (3) comprises a gear plate (31), a supporting wheel (32) and a clamping portion, wherein the supporting wheel (32) is connected to a supporting step (13) in the kettle body (1) via a connecting shaft, the supporting wheels (32) are multiple in number and all the supporting wheels (32) are distributed along the circumferential direction of the kettle body (1), the gear plate (31) is in contact with the supporting wheel (32), the gear plate (31) is meshingly connected with the transmission device (6), the clamping portion is fixedly connected to the upper end surface of the gear plate (31), and the clamping portion is clamped with the workpiece table (4).

5. A cleaning kettle according to claim 4, characterized in that: An annular strip (311) and a plurality of fixed teeth (312) are provided on the circumferential side wall of the gear plate (31), the fixed teeth (312) are located above the annular strip (311), the fixed teeth (312) are meshedly connected with the transmission device (6), and the outer side wall of the annular strip (311) is in contact with the outer wall of the supporting wheel (32); The outer side wall of the annular strip (311) is an inverted cone-shaped structure, and the supporting wheel (32) is a cone-shaped structure.

6. A cleaning kettle according to claim 4, characterized in that: The clamping portion comprises a positioning cone (33) and a positioning strip (34); the positioning cone (33) is fixedly connected to the center of the gear plate (31); the positioning strip (34) is fixedly connected to the upper end surface of the gear plate (31); the length direction of the positioning strip (34) is consistent with the radial direction of the gear plate (31); there are a plurality of positioning strips (34), and all the positioning strips (34) are distributed along the circumferential direction of the gear plate (31).

7. A cleaning kettle according to claim 1, characterized in that: The workpiece platform (4) comprises a frustum body (42) and a lifting ear (43), wherein the lifting ear (43) is fixedly connected to the upper end of the frustum body (42), the workpiece positioning portion (41) is connected to the side wall of the frustum body (42), a plurality of positioning grooves are arranged on the lower end surface of the frustum body (42), and a positioning hole (421) is arranged at the center of the frustum body (42); The workpiece positioning portion (41) is a magnetic attraction member.

8. A cleaning kettle according to claim 1, characterized in that: It also comprises a lid-turning mechanism (8), wherein the lid-turning mechanism (8) is used to open or close the kettle cover (2); The number of the flip cover mechanisms (8) is two; The lid-turning mechanism (8) comprises a support (81), a hydraulic cylinder (82) and a support arm (83); the support (81) is fixedly connected to the side wall of the kettle body (1); the lower end of the hydraulic cylinder (82) is rotatably connected to the lower end of the support (81); the upper end of the hydraulic cylinder (82) is rotatably connected to one end of the support arm (83); the upper end of the support (81) is rotatably connected to the end of the support arm (83); and the other end of the support arm (83) is fixedly connected to the kettle cover (2).

9. A cleaning kettle according to claim 1, characterized in that: It also includes a sealing structure (9), wherein the sealing structure (9) is used to seal the flange connection between the kettle cover (2) and the kettle body (1); The number of the sealing structures (9) is two; The sealing structure (9) comprises a sealing hoop (91), a connecting rod (92), a hoop support (93), a hydraulic cylinder push rod (94), a double-acting hydraulic cylinder (95), a C-type sealing ring (96) and an O-type sealing ring (97). The number of the sealing hoop (91), the connecting rod (92), the hoop support (93) and the hydraulic cylinder push rod (94) is two. The hoop support (93) is fixedly connected to the kettle body (1). The middle part of the sealing hoop (91) is connected to the One end of the connecting rod (92) is rotatably connected, the end of the double-acting hydraulic cylinder (95) is rotatably connected to one end of the hydraulic cylinder push rod (94), the other end of the connecting rod (92), the clamp support (93) and the other end of the hydraulic cylinder push rod (94) are connected through a connecting piece, and the connecting piece is rotatably connected to the clamp support (93), the C-type sealing ring (96) is located on the inner side of the flange connection, and the O-type sealing ring (97) is located in the middle of the flange connection; The sealing clamp (91) is provided with a notch groove.

10. A supercritical fluid cleaning system, characterized in that: The invention comprises a storage tank (10), a compressor (20), a heat exchange component, a pressure reducing valve (30), a gasification kettle (40), and a cleaning kettle (50) according to any one of claims 1 to 9, wherein the outlet of the storage tank (10) is connected to the inlet of the compressor (20) through a first pipeline (60), the outlet of the compressor (20) is connected to the inlet (11) of the cleaning kettle (50) through a second pipeline (70), the second pipeline (70) passes through the heating end of the heat exchange component, the discharge outlet (12) of the cleaning kettle (50) is connected to the inlet of the pressure reducing valve (30) through a third pipeline (80), the outlet of the pressure reducing valve (30) is connected to the inlet of the gasification kettle (40) through a fourth pipeline (90), the gas outlet of the gasification kettle (40) is connected to the inlet of the storage tank (10) through a fifth pipeline (100), and the fifth pipeline (100) passes through the cooling end of the heat exchange component; The branch of the second pipeline (70) is connected to the first branch of the fifth pipeline (100) via a sixth pipeline (110), and the branch of the first pipeline (60) is connected to the second branch of the fifth pipeline (100) via a seventh pipeline (120); The first pipeline (60) is provided with a first valve (130), the seventh pipeline (120) is provided with a second valve (140), the second pipeline (70) is provided with a third valve (150), the sixth pipeline (110) is provided with a fourth valve (160), and the fifth pipeline (100) is provided with a fifth valve (170).

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