Cleaning kettle and supercritical fluid cleaning system

Abstract

The utility model 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 utility model relates to industrial cleaning technical field especially is related to a kind of cleaning kettle and supercritical fluid cleaning system using. BACKGROUND

[0002] At present, traditional cleaning methods such as ultrasonic cleaning and jet cleaning can clean traditional parts well, but due to the large surface tension of traditional cleaning media, affected by capillary force, they cannot enter the micropores and narrow gaps of precision parts for effective cleaning, which affects the processing and use of precision parts. However, supercritical carbon dioxide has a surface tension close to zero, can overcome capillary force, and can effectively clean the micropores and narrow gaps of precision parts. In addition, the strong solubility and high diffusivity of supercritical fluid can ensure the cleaning effect and fundamentally avoid the generation of sewage. However, there is a lack of a reaction kettle that can use supercritical carbon dioxide as a solvent to clean a large number of parts in the prior art. SUMMARY

[0003] The utility model aims at providing a kind of cleaning kettle and supercritical fluid cleaning system to solve the technical problem that there is a lack of a reaction kettle that can use supercritical carbon dioxide as a solvent to clean a large number of parts in the prior art. The preferred technical solutions in the many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a kind of cleaning kettle, including kettle body, kettle cover, rotating structure and workpiece table, wherein the opening of the kettle body is detachably sealed connected with the kettle cover, the rotating structure is located in the kettle body and the rotating structure can rotate in the kettle body, and the workpiece table is placed on the rotating structure and the rotating structure can drive the workpiece table to rotate.

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

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

[0008] Optionally, the transmission device comprises at least one gear wheel, which is in meshing connection with the rotating structure.

[0009] Optionally, the rotating structure comprises a gear wheel disc, a plurality of supporting wheels and a clamping part, the supporting wheels are connected to the support steps in the kettle body through connecting shafts, the supporting wheels are distributed along the circumferential direction of the kettle body, the gear wheel disc is in contact with the supporting wheels, the gear wheel disc is in meshing connection with the transmission device, the clamping part is fixedly connected to the upper end surface of the gear wheel disc, and the clamping part is clamped with the workpiece table.

[0010] Optionally, the circumferential side wall of the gear wheel disc is provided with an annular strip and a plurality of fixed teeth, the fixed teeth are located above the annular strip, the fixed teeth are in meshing connection 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 a reverse conical structure, and the supporting wheel is a conical structure.

[0012] Optionally, the clamping part comprises a positioning cone and a plurality of positioning strips, the positioning cone is fixedly connected to the center of the gear wheel disc, the positioning strips are fixedly connected to the upper end surface of the gear wheel disc and the length direction of the positioning strips is consistent with the radial direction of the gear wheel disc, and the positioning strips are distributed along the circumferential direction of the gear wheel disc.

[0013] Optionally, the workpiece table comprises a conical main body and a lifting lug, the lifting lug is fixedly connected to the upper end of the conical main body, a workpiece positioning part is connected to the side wall of the conical main body, a plurality of positioning grooves are arranged on the lower end surface of the conical main body, and a positioning hole is arranged at the center of the conical main body.

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

[0015] Optionally, the lid opening and closing mechanism is used for opening or closing the kettle cover.

[0016] The number of the lid opening and closing mechanisms is two.

[0017] The lid opening and closing mechanism comprises a support, a hydraulic cylinder and a supporting arm, the support is fixedly connected to the side wall of the kettle body, the lower end of the hydraulic cylinder is rotationally connected to the lower end of the support, the upper end of the hydraulic cylinder is rotationally connected to one end of the supporting arm, the upper end of the support is rotationally connected to the end of the supporting arm, and the other end of the supporting arm is fixedly connected to the kettle cover.

[0018] Optionally, 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 clamp, a connecting rod, a clamp support, a hydraulic cylinder push rod, a double-acting hydraulic cylinder, a C-shaped sealing ring and an O-shaped sealing ring, the number of the sealing clamp, the connecting rod, the clamp support and the hydraulic cylinder push rod is two, the clamp support is fixedly connected with the kettle body, the middle part of the sealing clamp is rotationally connected with one end of the connecting rod, the end part of the double-acting hydraulic cylinder is rotationally connected with one end of the hydraulic cylinder push rod, the other end of the connecting rod, the clamp support and the other end of the hydraulic cylinder push rod are connected through a connecting piece, the connecting piece is rotationally connected with the clamp support, the C-shaped sealing ring is located on the inner side of the flange connection, and the O-shaped sealing ring is located on the middle part of the flange connection.

[0021] A notch groove is arranged on the sealing clamp.

[0022] The utility model provides a kind of to adopt supercritical fluid cleaning system, including storage tank, compressor, heat exchange component, pressure reducing valve, gasification kettle and cleaning kettle, the outlet of the storage tank is connected with the inlet of the compressor by first pipeline intercommunication, the outlet of the compressor is connected with the inlet (11) of the cleaning kettle by second pipeline intercommunication, the second pipeline passes through the heating end of the heat exchange component, the discharge outlet (12) of the cleaning kettle is connected with the inlet of the pressure reducing valve by third pipeline intercommunication, the outlet of the pressure reducing valve is connected with the inlet of the gasification kettle by fourth pipeline intercommunication, the gas outlet of the gasification kettle is connected with the inlet of the storage tank by fifth pipeline intercommunication, the fifth pipeline passes through the refrigeration end of the heat exchange component.

[0023] Branch of the second pipeline is connected with the first branch of the fifth pipeline by sixth pipeline intercommunication, branch of the first pipeline is connected with the second branch of the fifth pipeline by seventh pipeline intercommunication.

[0024] First valve is arranged on the first pipeline, second valve is arranged on the seventh pipeline, third valve is arranged on the second pipeline, fourth valve is arranged on the sixth pipeline, fifth valve is arranged on the fifth pipeline.

[0025] The utility model provides a kind of cleaning kettle, supercritical carbon dioxide is sent into kettle body by inlet, place multiple to-be-cleaned workpieces on corresponding workpiece positioning part, when cleaning, kettle body and kettle cover are sealedly connected, rotating structure is rotated in kettle body by pushing workpiece table, so that each to-be-cleaned workpiece on workpiece table can contact with supercritical carbon dioxide, and then a large number of workpieces can be cleaned, to solve the technical problem that there is no reaction kettle using supercritical carbon dioxide as solvent to clean a large number of parts in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 is a front view of the closing state of the cleaning kettle provided by the embodiment of the present application;

[0028] Figure 2 is a front view of the opening state of the cleaning kettle provided by the embodiment of the present application;

[0029] Figure 3 is Figure 1 the sectional view of A-A in FIG.

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

[0031] Figure 5 is Figure 4 the sectional view of B-B in FIG.

[0032] Figure 6 is Figure 5 the partial view of C in FIG.

[0033] Figure 7 is a flow chart of the cleaning kettle provided by the embodiment of the present application.

[0034] 1, kettle body; 11, inlet; 12, outlet; 13, support step;

[0035] 2, kettle cover; 21, pressure detection port;

[0036] 3, rotating structure; 31, gear plate; 311, annular strip; 312, fixed tooth; 32, supporting wheel; 33, positioning cone; 34, positioning strip;

[0037] 4, workpiece table; 41, workpiece positioning part; 42, conical main body; 421, positioning hole; 43, lifting lug;

[0038] 5, driving device;

[0039] 6, transmission device; 61, gear;

[0040] 7, sealing shell;

[0041] 8, flip mechanism; 81, support; 82, hydraulic cylinder; 83, supporting 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-shaped sealing ring; 97, O-shaped 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] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0045] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The utility model provides a kind of cleaning kettle, including kettle body 1, kettle cover 2, rotating structure 3 and workpiece table 4, wherein, the opening of kettle body 1 is detachably sealed with kettle cover 2, rotating structure 3 is located in kettle body 1 and rotating structure 3 can rotate in kettle body 1, workpiece table 4 is placed on rotating structure 3 and rotating structure 3 can promote workpiece table 4 rotation;

[0048] A plurality of workpiece positioning portions 41 are provided on the workpiece table 4, and an inlet 11 and an outlet 12 are provided 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 on the bottom of the kettle body 1. The impurities on the workpieces to be cleaned can be discharged from the outlet 12 along with the supercritical carbon dioxide fluid. A pressure detection port 21 is provided on the kettle cover 2 for detecting the pressure of the kettle body 1. The cleaning kettle provided by the utility model can send supercritical carbon dioxide into the kettle body 1 through the inlet 11. The plurality of workpieces to be cleaned are placed on the corresponding workpiece positioning portions 41. When cleaning, the kettle body 1 and the kettle cover 2 are sealed and connected. The rotating structure 3 rotates in the kettle body 1 by pushing the workpiece table 4. Thus, the workpieces to be cleaned on the workpiece table 4 can be in contact with the supercritical carbon dioxide. In turn, a large number of workpieces can be cleaned. The technical problem that there is no reaction kettle in the prior art that can use supercritical carbon dioxide as a solvent to clean a large number of parts is solved.

[0049] As an optional implementation, the utility model also includes a driving device 5, a transmission device 6, and a sealing shell 7. The sealing shell 7 is fixedly connected with the side wall of the kettle body 1, and the inside of the sealing shell 7 is communicated with the inside of the kettle body 1. The transmission device 6 is located in the sealing shell 7. The sealing shell 7 is used to maintain the sealing of the inside of the kettle body 1 and to withstand the pressure of the supercritical fluid in the kettle body 1. The sealing shell 7 reduces the friction and loss between the output shaft of the driving device 5 and the kettle body 1, improves the efficiency of the equipment, and connects the housing of the driving device 5 with the sealing shell 7. The output shaft of the driving device 5 extends into the sealing shell 7 and is connected with the transmission device 6. The output shaft of the driving device 5 is sealed with the sealing shell 7. The transmission device 6 is connected with the rotating structure 3. The driving device 5 can be a variable frequency speed motor. After the driving device 5 is started, the transmission device 6 can be driven to operate, which in turn drives the rotating structure 3 to move, and finally makes the workpiece table 4 rotate.

[0050] The kettle body 1 includes a cylindrical barrel and a semi-elliptical head. The cylindrical barrel and the semi-elliptical head are welded and connected. The diameter of the cylindrical barrel is greater than the diameter of the semi-elliptical head. The connection part of the cylindrical barrel and the semi-elliptical head forms a support step 13.

[0051] As an optional implementation, the transmission device 6 comprises at least one gear 61, the gear 61 is in meshing connection with the rotating structure 3, the two gears 61 are in meshing connection, and the torque transmitted to the gear disc 31 can be adjusted by changing the speed ratio of the two gears 61. The rotating structure 3 comprises the gear disc 31, the carrier wheel 32 and the clamping part, the carrier wheel 32 is connected to the support step 13 in the kettle body 1 through the connecting shaft, the number of the carrier wheel 32 is multiple and all the carrier wheels 32 are distributed along the circumferential direction of the kettle body 1, the gear disc 31 is in contact with the carrier wheel 32, the carrier wheel 32 is used to support the gear disc 31, the gear disc 31 is in meshing connection with the transmission device 6, the clamping part is fixedly connected with the upper end surface of the gear disc 31, and the clamping part is clamped with the workpiece table 4. After the driving device 5 is started, the gear 61 is driven to rotate, so as to drive the gear disc 31 to rotate, and the workpiece table 4 is rotated through the clamping part.

[0052] As an optional implementation, the circumferential side wall of the gear disc 31 is provided with an annular strip 311 and a plurality of fixed teeth 312, the fixed teeth 312 are located above the annular strip 311, the fixed teeth 312 are in meshing connection with the gear 61, and the outer side wall of the annular strip 311 is in contact with the outer wall of the carrier wheel 32.

[0053] The outer side wall of the annular strip 311 is a reverse taper structure, the carrier wheel 32 is a taper structure, and the taper ratio of the annular strip 311 and the carrier wheel 32 is 1:3-10. The gear disc 31 can realize automatic adjustment of dynamic balance, the gear disc 31 is supported and limited by the taper carrier wheel 32, the contact angle between the gear disc 31 and the taper carrier wheel 32 is continuously adjusted during operation, and the balance of the gear disc 31 is maintained.

[0054] As an optional implementation, the clamping part comprises a positioning cone 33 and a positioning strip 34, the positioning cone 33 is fixedly connected with the center of the gear disc 31, the positioning strip 34 is fixedly connected with the upper end surface of the gear disc 31 and the length direction of the positioning strip 34 is consistent with the radial direction of the gear disc 31, the number of the positioning strip 34 is multiple, and all the positioning strips 34 are distributed along the circumferential direction of the gear disc 31.

[0055] As an optional implementation, the workpiece table 4 comprises a taper main body 42 and a lifting lug 43, the lifting lug 43 is fixedly connected with the upper end of the taper main body 42, the lifting lug 43 is convenient for hoisting operation of the workpiece table 4 and is used for loading and unloading of the workpiece table 4, the workpiece positioning part 41 is connected with the side wall of the taper main body 42, the lower end surface of the taper main body 42 is provided with a plurality of positioning grooves, the positioning grooves correspond to the positioning strips 34 one by one, the positioning strips 34 extend into the positioning grooves and are clamped with each other, the center of the taper main body 42 is provided with a positioning hole 421, 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 suction element, which can be a super-strong permanent magnetic suction disc, used for fixing the workpiece to be cleaned. The super-strong permanent magnetic suction disc is used to fix the workpiece to be processed, which is fast and damage-free. The workpiece to be cleaned is arranged and assembled outside the kettle, which greatly improves the operation efficiency of the extraction kettle.

[0057] The frustum body 42 is one of a polygonal regular truncated pyramid or a circular truncated cone. The frustum body 42 adopts a polygonal regular truncated pyramid, the number of sides of the regular truncated pyramid should be even, and different specifications of super-strong permanent magnetic suction discs are installed according to the size of the side of the regular truncated pyramid, used for fixing the workpiece to be processed.

[0058] As an optional implementation, the kettle cover 2 further comprises a flip mechanism 8, which is used to open or close the kettle cover 2.

[0059] The number of flip mechanisms 8 is two, and the two flip mechanisms 8 are located on the same side of the kettle cover 2.

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

[0061] As an optional implementation, the kettle cover 2 further comprises a sealing structure 9, which 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 comprises two sealing clamps 91, two connecting rods 92, two clamp supports 93, two hydraulic cylinder push rods 94, a double-acting hydraulic cylinder 95, a C-shaped sealing ring 96 and an O-shaped sealing ring 97. The two sealing clamps 91, the two connecting rods 92, the two clamp supports 93 and the two hydraulic cylinder push rods 94 are respectively located on the two sides of the double-acting hydraulic cylinder 95. The clamp support 93 is fixedly connected with the kettle body 1. The middle part of the sealing clamp 91 is rotatably connected with one end of the connecting rod 92. The end of the double-acting hydraulic cylinder 95 is rotatably connected with one end of the hydraulic cylinder push rod 94. The other end of the connecting rod 92, the other end of the hydraulic cylinder push rod 94 and the clamp support 93 are connected through a connecting piece, and the connecting piece is rotatably connected with the clamp support 93. The C-shaped sealing ring 96 is located on the inner side of the flange connection, and the O-shaped sealing ring 97 is located on the middle part of the flange connection. When the double-acting hydraulic cylinder 95 extends or retracts, the hydraulic cylinder push rod 94 is driven to move, thereby driving the clamp support 93 to move, so that the sealing clamp 91 approaches or moves away from the flange connection. The sealing clamp 91 is provided with a notch groove, and the clamp support 93 is made of high-strength steel material. The flange connection is inserted into the notch groove.

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

[0065] The C-shaped sealing ring 96 is a metal sealing member. Compared with a rubber or plastic non-metal sealing member, the metal sealing member will not produce creep due to long-term stress, and has stable chemical properties.

[0066] The C-shaped sealing ring 96 and the O-shaped sealing ring 97 are used for quick release sealing of a high-pressure container. The cross section of the C-shaped sealing ring 96 is in the shape of a "C" letter, and two flat boss sealing surfaces are provided on the two sides. When the flange connection is subjected to the force of the sealing clamp 91, the top and bottom of the C-shaped sealing ring 96 are extruded to form an initial seal. When the pressure in the kettle body 1 continuously rises, the inner wall of the opening of the C-shaped sealing ring 96 is deformed by the pressure, and the outer wall of the opening is pushed to adhere to the C-shaped sealing base (kettle flange) to form a working condition seal.

[0067] The utility model provides a kind of supercritical fluid cleaning system is adopted, including storage tank 10, compressor 20, heat exchange component, pressure reducing valve 30, gasification kettle 40 and cleaning kettle 50, the outlet of storage tank 10 is connected with the inlet of compressor 20 by first pipeline 60, the outlet of compressor 20 is connected with the inlet of cleaning kettle 50 by second pipeline 70, second pipeline 70 passes through the heating end of heat exchange component, the outlet of cleaning kettle 50 is connected with the inlet of pressure reducing valve 30 by third pipeline 80, the outlet of pressure reducing valve 30 is connected with the inlet of gasification kettle 40 by fourth pipeline 90, the gas outlet of gasification kettle 40 is connected with the inlet of storage tank 10 by fifth pipeline 100, fifth pipeline 100 passes through the refrigeration end of heat exchange component;

[0068] Heat exchange component includes heater 180, cooler 190, refrigerant compressor 200 and expansion valve 210, heater 180, expansion valve 210, cooler 190 and refrigerant compressor 200 are sequentially circulated and communicated, second pipeline 70 passes through heater 180, fifth pipeline 100 passes through cooler 190;

[0069] The branch of second pipeline 70 is connected with the first branch of fifth pipeline 100 by sixth pipeline 110, and the branch of first pipeline 60 is connected with the second branch of fifth pipeline 100 by seventh pipeline 120.

[0070] First valve 130 is arranged on first pipeline 60, second valve 140 is arranged on seventh pipeline 120, third valve 150 is arranged on second pipeline 70, fourth valve 160 is arranged on sixth pipeline 110, and fifth valve 170 is arranged on fifth pipeline 100.

[0071] The utility model discloses a kind of supercritical fluid cleaning system is operated to carry out cleaning operation process:

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

[0073] Low-pressure carbon dioxide in storage tank 10 is pressurized by compressor 20, and high-pressure carbon dioxide is heated to process set temperature by heater 180, enters cleaning kettle 50, high-pressure carbon dioxide fluid contacts workpiece on workpiece table 4 in cleaning kettle 50, impurities washed from workpiece surface are discharged from cleaning kettle 50 with carbon dioxide fluid by using the characteristics that CO2 molecule is symmetrical structure and polarity is very small, and carbon dioxide fluid is depressurized by pressure reducing valve 30, and carbon dioxide and impurities are separated in gasification kettle 40.

[0074] Carbon dioxide after gasification is cooled and liquefied in cooler 190, and liquid carbon dioxide returns 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 carbon dioxide in the heater 180. The cooled refrigerant is reduced in pressure under the flow limiting action of the expansion valve 210, and the refrigerant is vaporized in the cooler 190. When vaporized, the heat of the carbon dioxide discharged from the gasification kettle 40 is absorbed into the refrigerant compressor 200, so that the heat balance is achieved by such a cycle, without the need for an additional heat source and the temperature of the carbon dioxide is controlled. By adjusting the operating speed of the refrigerant compressor 200 and the opening of the expansion valve 210, the working temperature of the heater 180 can be controlled.

[0076] Carbon dioxide recovery

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

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

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

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

[0081] 2. Using supercritical carbon dioxide as a solvent and reaction medium, compared with water, CO2 molecules have a symmetrical structure and very low polarity. According to the principle of similar dissolves similar, CO2 can dissolve non-polar or low-polar organic substances that water cannot dissolve, and can be used as a solvent for organic reactions to keep the reaction homogeneous by dissolving liposoluble reactants and products in it;

[0082] 3. Using supercritical carbon dioxide as a solvent and reaction medium, compared with water, it can clean workpieces with complex geometry at room temperature without the need for additional drying time.

[0083] 4. Adding a cosolvent to supercritical carbon dioxide increases the solubility of solutes (dirt on the surface of the workpiece) in supercritical carbon dioxide, or adding a cosolvent specifically to solve the problem of single supercritical carbon dioxide that cannot handle the workpiece, and solves the problem of single scene for water-based solvents;

[0084] 5. The supercritical carbon dioxide has the dissolving condition suitable for various solutes by adjusting single condition of temperature, pressure of supercritical carbon dioxide;

[0085] The supercritical carbon dioxide is not only the solvent, but also provides inert environment for the reaction, and can be recycled, energy and resources are saved.

[0086] The above merely is the specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the change or replacement within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cleaning vessel characterized by, The utility model relates to a kind of rotary furnace, including kettle body (1), kettle cover (2), rotating structure (3) and workpiece table (4), wherein, The opening of the kettle body (1) is detachably sealedly connected with 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 the rotating structure (3) can drive the workpiece table (4) to rotate; A plurality of workpiece positioning portions (41) are provided on the workpiece table (4), 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 vessel according to claim 1, wherein, Further comprising driving device (5), transmission device (6) and sealing shell (7), the sealing shell (7) is fixedly connected with the side wall of the kettle body (1), and the inside of the sealing shell (7) is communicated with the inside of the kettle body (1), the transmission device (6) is located in the sealing shell (7), the shell of the driving device (5) is connected with the sealing shell (7), the output shaft of the driving device (5) extends into the sealing shell (7) and is connected with the transmission device (6), and the transmission device (6) is connected with the rotating structure (3).

3. A cleaning vessel according to claim 2, wherein, The transmission device (6) comprises at least one gear (61), and the gear (61) is meshed with the rotating structure (3).

4. The cleaning vessel of claim 2, wherein, The rotating structure (3) comprises a gear disc (31), a plurality of supporting rollers (32) and a clamping portion, the supporting rollers (32) are connected to the support steps (13) in the kettle body (1) through connecting shafts, the number of the supporting rollers (32) is plural, and all the supporting rollers (32) are distributed along the circumferential direction of the kettle body (1), the gear disc (31) is in contact with the supporting rollers (32), the gear disc (31) is meshed with the transmission device (6), the clamping portion is fixedly connected with the upper end surface of the gear disc (31), and the clamping portion is clamped with the workpiece table (4).

5. A cleaning vessel according to claim 4, wherein, An annular strip (311) and a plurality of fixed teeth (312) are arranged on the circumferential side wall of the gear disc (31), the fixed teeth (312) are located above the annular strip (311), the fixed teeth (312) are meshed 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 roller (32). The outer side wall of the annular strip (311) is in inverted conical structure, and the supporting roller (32) is in conical structure.

6. A cleaning vessel according to claim 4, wherein, The clamping portion comprises a positioning cone (33) and a positioning strip (34), the positioning cone (33) is fixedly connected with the center of the gear disc (31), the positioning strip (34) is fixedly connected with the upper end surface of the gear disc (31), the length direction of the positioning strip (34) is consistent with the radial direction of the gear disc (31), and the number of the positioning strip (34) is plural.

7. The cleaning vessel of claim 1, wherein, The workpiece table (4) comprises a conical body (42) and an ear (43), the ear (43) is fixedly connected with the upper end of the conical body (42), the workpiece positioning part (41) is connected with the side wall of the conical body (42), a plurality of positioning grooves are arranged on the lower end face of the conical body (42), and a positioning hole (421) is arranged at the center of the conical body (42); The workpiece positioning part (41) is a magnetic attraction element.

8. The cleaning vessel of claim 1, wherein, A flip mechanism (8) is further included, and the flip mechanism (8) is used for opening or closing the kettle cover (2); The number of the flip mechanism (8) is two. The flip mechanism (8) comprises a support (81), a hydraulic cylinder (82) and a support arm (83), the support (81) is fixedly connected with the side wall of the kettle body (1), the lower end of the hydraulic cylinder (82) is rotatably connected with the lower end of the support (81), the upper end of the hydraulic cylinder (82) is rotatably connected with one end of the support arm (83), the upper end of the support (81) is rotatably connected with the end of the support arm (83), and the other end of the support arm (83) is fixedly connected with the kettle cover (2).

9. The cleaning vessel of claim 1, wherein, A sealing structure (9) is further included, and the sealing structure (9) is used for sealing the flange connection between the kettle cover (2) and the kettle body (1); The number of the sealing structure (9) is two. The sealing structure (9) comprises a sealing clamp (91), a connecting rod (92), a clamp support (93), a hydraulic cylinder push rod (94), a double-acting hydraulic cylinder (95), a C-shaped sealing ring (96) and an O-shaped sealing ring (97), the number of the sealing clamp (91), the connecting rod (92), the clamp support (93) and the hydraulic cylinder push rod (94) is two, the clamp support (93) is fixedly connected with the kettle body (1), the middle part of the sealing clamp (91) is rotatably connected with one end of the connecting rod (92), the end of the double-acting hydraulic cylinder (95) is rotatably connected with 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, the connecting piece is rotatably connected with the clamp support (93), the C-shaped sealing ring (96) is located on the inner side of the flange connection, and the O-shaped sealing ring (97) is located in the middle part of the flange connection. A notch groove is arranged on the sealing clamp (91).

10. A supercritical fluid cleaning system characterized by, The system comprises a storage tank (10), a compressor (20), a heat exchange assembly, a pressure reducing valve (30), a gasification kettle (40) and the cleaning kettle (50) of any one of claims 1-9, the outlet of the storage tank (10) is connected with the inlet of the compressor (20) through a first pipeline (60), the outlet of the compressor (20) is connected with 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 assembly, the outlet (12) of the cleaning kettle (50) is connected with the inlet of the pressure reducing valve (30) through a third pipeline (80), the outlet of the pressure reducing valve (30) is connected with the inlet of the gasification kettle (40) through a fourth pipeline (90), the gas outlet of the gasification kettle (40) is connected with the inlet of the storage tank (10) through a fifth pipeline (100), the fifth pipeline (100) passes through the refrigeration end of the heat exchange assembly; The branch of the second pipeline (70) is connected with the first branch of the fifth pipeline (100) through a sixth pipeline (110), the branch of the first pipeline (60) is connected with the second branch of the fifth pipeline (100) through a seventh pipeline (120); The first valve (130) is arranged on the first pipeline (60), the second valve (140) is arranged on the seventh pipeline (120), the third valve (150) is arranged on the second pipeline (70), the fourth valve (160) is arranged on the sixth pipeline (110), and the fifth valve (170) is arranged on the fifth pipeline (100).

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