Low-temperature vacuum stirring device and stirring method

Abstract

The present application relates to the technical field of chemical production equipment, and provides a low-temperature vacuum stirring device, including a machine base, a mobile frame, a stirring tank, a cooling assembly, a lifting assembly, a stirring assembly, a kettle cover and a vacuum tube; the stirring tank is placed on the mobile frame, and the stirring tank includes an outer shell and an inner shell, and the inner shell and the outer shell form a cavity for storing cooling water; the cooling assembly includes an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are both connected to the cavity; the lifting assembly is provided on the machine base and is used to lift the stirring tank; the kettle cover is installed on the machine base and is used to be sealed with the stirring tank; the stirring assembly is provided in the kettle cover and is used to stir the material; the vacuum tube is connected to the kettle cover and is used to evacuate the stirring tank. The present application has the effect of facilitating the stirring of materials under low-temperature vacuum conditions. In addition, the present application also provides a stirring method.

Description

Technical Field

[0001] The present application relates to the technical field of chemical production equipment, and in particular to a low-temperature vacuum stirring device and a stirring method. Background Art

[0002] In the chemical industry, epoxy glue is also called epoxy resin or epoxy resin glue. It has a variety of applications because of its low price compared to other similar products. Epoxy glue is in the form of a transparent liquid and needs to be mixed with AB to be solidified. The solidified product has the characteristics of water resistance, chemical corrosion resistance, and crystal clearness. In the production process of epoxy sealant, a stirring device is required to mix various raw materials.

[0003] In the prior art, a stirring device typically consists of a tank, an agitator, a transmission assembly, and a shaft seal assembly. The tank, which holds the material, is typically made of materials such as carbon steel, stainless steel, or enamel to meet the corrosive requirements of different chemical materials. The agitator is the core component of the stirring device, directly stirring and mixing the material. The agitator shaft passes through an opening in the top or side of the tank, and a shaft seal assembly is installed at the connection between the shaft and the tank to ensure the tank's tightness.

[0004] The main function of the shaft seal assembly is to prevent leakage between the agitator and the tank, ensuring that the material inside the tank is sealed and preventing foreign matter from entering the tank. Common shaft seal types include packing seals and mechanical seals. The transmission assembly is used to power the agitator, enabling it to rotate at a set speed and direction. It typically consists of a motor, a reducer, and a coupling. The motor provides the power source, while the reducer reduces the motor's high speed to a speed suitable for the agitator. The coupling connects the reducer and agitator shafts to ensure efficient power transmission.

[0005] Regarding the above-mentioned related technologies, materials usually need to be stirred and processed under low temperature and vacuum environment. Although the existing stirring device can achieve basic stirring functions, it still has shortcomings in providing low temperature and vacuum environment conditions, and therefore needs to be improved. Summary of the Invention

[0006] In order to facilitate the stirring of materials under low-temperature vacuum conditions, the present application provides a low-temperature vacuum stirring device.

[0007] In the first aspect, the present application provides a low-temperature vacuum stirring device adopting the following technical solution:

[0008] A low-temperature vacuum stirring device, comprising a machine base, a mobile frame, a stirring tank, a cooling component, a lifting component, a stirring component, a kettle cover and a vacuum tube;

[0009] The mixing tank is provided with an opening and is placed on the mobile frame, and a handrail is connected to the side wall of the mixing tank; the mixing tank includes an outer shell and an inner shell, the outer shell and the inner shell are coaxially arranged, the inner shell is arranged inside the outer shell, and a cavity is formed between the two, and the cavity is used to store cooling water;

[0010] The cooling assembly includes a water inlet pipe and a water outlet pipe, both of which are in communication with the cavity, and a connection between the water inlet pipe and the stirring tank is lower than a connection between the water outlet pipe and the stirring tank;

[0011] The lifting assembly is provided on the machine base and is used to lift the mixing tank; the kettle cover is installed on the machine base and is located above the lifting assembly, and the kettle cover is used to be sealed and connected to the mixing tank;

[0012] The stirring assembly is arranged in the kettle cover and is used to stir the material; the vacuum tube is connected to the kettle cover and is used to vacuum the stirring tank.

[0013] Using this technical solution, during production, the worker first places the empty mixing tank on the mobile frame and then adds the material to be mixed into the inner shell of the mixing tank. After adding, the worker holds the handrails with both hands and applies force to push the entire mobile frame (static friction between the bottom of the mixing tank and the mobile frame) to move the mixing tank to a position directly below the kettle cover.

[0014] Then operate the lifting assembly, which supports the bottom of the mixing tank and slowly lifts it up, so that the mixing tank moves vertically upward in the direction close to the kettle cover, so that the open end of the mixing tank and the lower end of the kettle cover fit tightly together to form a closed space.

[0015] Then connect the water inlet pipe and the water outlet pipe to the mixing tank respectively. Both the water inlet pipe and the water outlet pipe are flexible pipes. Then, the coolant is pumped into the cavity of the mixing tank along the water inlet pipe. The coolant fills the cavity from bottom to top and then flows out from the water outlet pipe. The circulating cooling of the mixing tank is achieved by heat transfer.

[0016] At the same time, the external vacuum pump is started to extract the gas between the mixing tank and the kettle cover through the vacuum tube to reduce the internal pressure and form a vacuum environment. Finally, the stirring component is operated to stir the materials, so that the entire stirring operation is carried out in a low-temperature vacuum environment.

[0017] Preferably, the lifting assembly includes a guide rail, a lifting plate, a support plate and a driving member, the guide rail is connected to the machine base in the vertical direction, the lifting plate is slidably connected to the guide rail, the support plate is provided on the lifting plate and is located directly below the kettle cover, and the support plate is used to support the mixing tank on the mobile frame; the driving member is connected to the lifting plate and is used to control the up and down movement of the lifting plate.

[0018] By adopting the above technical solution, when the mixing tank moves to just below the kettle cover, the operating drive controls the lifting plate to move vertically upward along the guide rail, and the support plate is supported on the bottom of the mixing tank and slowly rises, so that the mixing tank gradually approaches the kettle cover.

[0019] The driving element is a lifting cylinder equipped with a stroke control mechanism. This mechanism controls the piston rod to stop at a predetermined position, achieving precise mechanical actions (such as clamping, pushing, and lifting). This mechanism provides a continuous, stable, and reliable lifting force to the support plate, ensuring a tight fit between the mixing tank and the kettle lid. Typical stroke control mechanisms include, but are not limited to, mechanical stops, magnetic switches plus solenoid valves, and displacement sensors plus controllers. These are existing technologies and will not be discussed here.

[0020] Preferably, the stirring assembly includes a stirring motor, a fixed disk and a stirring fork, the stirring motor is arranged on the machine base, the driving shaft of the stirring motor is connected to the fixed disk, the fixed disk is located inside the kettle cover, and the stirring fork is arranged on the fixed disk and is used to stir the material.

[0021] By adopting the above technical solution, the stirring motor can control the rotation of the fixed disk, thereby driving the stirring fork to stir the material in the stirring tank to achieve sufficient mixing of the material.

[0022] Preferably, it further comprises a positioning plate and a scraper, wherein the positioning plate is connected to the fixed disk, the scraper is connected to the positioning plate and is used to scrape the material on the inner wall of the mixing tank, and the scraper is made of flexible material.

[0023] By adopting the above technical solution, the positioning plate is used as a carrier and the scraper can be installed on the positioning plate. When the stirring motor drives the fixed disk to rotate, the positioning plate will also rotate, causing the scraper to move in a circular motion and scrape off the material adhering to the inner wall of the mixing tank.

[0024] Preferably, the mobile frame includes a frame body, a support rod, a load-bearing plate and universal wheels. The universal wheels are rotatably connected to the bottom of the frame body and are distributed at intervals. The support rod is provided on the frame body. The load-bearing plate is connected to one end of the support rod away from the frame body and is used for placing the mixing tank. The load-bearing plate is provided with a clearance hole for the support plate to pass through.

[0025] By adopting this technical solution, the universal wheels enable sliding contact between the frame and the ground, reducing the friction encountered when the mixing tank is moved. The load-bearing plate is used to support the mixing tank, ensuring its stable placement. The clearance holes ensure that the support plate passes through the load-bearing plate from bottom to top and contacts the bottom of the mixing tank, thereby driving the mixing tank up or down.

[0026] Preferably, a first limiting bar and a second limiting bar are connected to the machine base, and the first limiting bar and the second limiting bar are arranged in parallel and are used to limit the movable frame.

[0027] By adopting the above technical solution, the first limiting strip and the second limiting strip can play a limiting role so that the mobile frame can be accurately parked between the first limiting strip and the second limiting strip.

[0028] Preferably, the frame is also rotatably connected to side wheels, the first limit bar and the second limit bar are both connected to guide plates, and the two guide plates are parallel to each other; when the mobile frame enters between the two limit bars, the side wheels abut against the guide plates.

[0029] By adopting the above technical solution, when the movable frame gradually enters between the two limit bars, the side wheels can roll along the guide plates, thereby playing a guiding role.

[0030] Preferably, it also includes an observation window and a lighting lamp. An opening is provided through the kettle cover, and the observation window is sealed at the opening. The observation windows are made of transparent material and are provided in plurality. The lighting lamp is close to one of the observation windows and is used to illuminate the interior of the mixing tank.

[0031] By adopting the above technical solution, when the material is in the mixing process, the staff can observe the mixing situation in the mixing tank through the observation window. The presence of the lighting can illuminate the interior of the mixing tank, making it easier for the staff to observe.

[0032] Preferably, the machine further comprises a pressing assembly for pressing the mixing tank against the support plate; the pressing assembly comprises a rack, a gear, a connecting rod, a pressing block and a fixing block, the rack being arranged on one side of the lifting plate and arranged vertically, the gear being rotatably connected to the machine base and meshing with the rack, and the connecting rod being coaxially arranged on the gear;

[0033] The pressing block is connected to the end of the connecting rod away from the gear, and the fixing block is provided on the side wall of the outer shell of the mixing tank. The fixing block is provided with a pressing groove for the pressing block to abut against;

[0034] When the lifting plate moves vertically upward, the support plate drives the mixing tank to move in a direction close to the kettle cover; at this time, the rack drives the gear and the connecting rod to rotate, and the pressing block rotates along with the connecting rod;

[0035] When the upper end of the stirring tank abuts against the kettle cover, the pressing block rotates and abuts against the pressing groove of the fixed block; wherein, the clamping assembly is symmetrically arranged in two groups, and the two clamping assemblies are respectively arranged on both sides of the stirring tank.

[0036] By adopting the above technical solution, when the lifting plate moves vertically upward, the support plate drives the mixing tank to move in the direction closer to the kettle cover. The rack on the lifting plate drives the gear and connecting rod to rotate, causing the pressing block to rotate along with the connecting rod and rotate in the direction closer to the mixing tank.

[0037] When the upper end of the mixing tank abuts the kettle cover, the pressing block contacts the pressing groove of the fixed block, generating a vertical downward force on the mixing tank, improving the stability of the mixing tank on the support plate. At the same time, the two pressing blocks also limit the sides of the mixing tank, preventing the mixing tank from tipping over and improving production safety.

[0038] In a second aspect, the present application further provides a stirring method, which uses a stirring device with all the above structures to stir materials, using the following technical solution:

[0039] S1. After the material to be mixed is placed inside the mixing tank, the staff holds the handrails with both hands and pushes the entire mobile frame to move the mixing tank to the bottom of the kettle cover;

[0040] S2. Then, the lifting assembly is operated to slowly lift the mixing tank and move it vertically upward in a direction close to the kettle cover, so that the mixing tank and the kettle cover fit tightly together;

[0041] S3, then operate the cooling component, the external coolant flows into the cavity of the mixing tank through the water inlet pipe, the coolant fills the cavity from bottom to top, and flows out from the water outlet pipe, realizing circulating cooling and temperature reduction;

[0042] S4. Start the external vacuum pump to extract the gas in the mixing tank from the vacuum tube to reduce the internal pressure and form a vacuum environment;

[0043] S5. Finally, operate the stirring assembly to fully stir the materials in the stirring tank.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] (1) By setting up a mobile frame, a mixing tank, a cooling component, a lifting component, a mixing component, a kettle cover and a vacuum tube, the lifting component can support the bottom of the mixing tank and drive the mixing tank and the kettle cover to fit together; the cooling component can inject cooling water into the cavity of the mixing tank and achieve cooling by heat transfer; the vacuum pump extracts the air in the mixing tank through the vacuum tube, thereby forming a vacuum environment, and the mixing component can stir the material, so that the entire mixing operation is carried out in a low-temperature vacuum environment, thereby ensuring the production quality of the product.

[0046] (2) By setting up an observation window, when the material is in the mixing process, the staff can observe the mixing situation in the mixing tank through the observation window.

[0047] (3) By setting a clamping assembly, the clamping assembly can limit the mixing tank on the support plate and improve the stability of the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic structural diagram of a stirring device in one embodiment of the present application;

[0049] Figure 2 This is a partial structural diagram of a stirring device in one embodiment of the present application;

[0050] Figure 3 This is a structural diagram of a mobile frame and a mixing tank in one embodiment of the present application;

[0051] Figure 4 This is a structural diagram of a lifting assembly in one embodiment of the present application;

[0052] Figure 5 This is a schematic structural diagram of a stirring assembly in one embodiment of the present application;

[0053] Figure 6 This is a schematic structural diagram of a stirring device in another embodiment of the present application;

[0054] Figure 7 It is a partial structural diagram of a stirring device in another embodiment of the present application.

[0055] Figure numerals: 1. base; 2. movable frame; 21. frame; 22. support rod; 23. load-bearing plate; 24. universal wheel; 3. mixing tank; 4. cooling assembly; 41. water inlet pipe; 42. water outlet pipe; 5. lifting assembly; 51. guide rail; 52. lifting plate; 53. support plate; 54. driving part; 6. stirring assembly; 61. stirring motor; 62. fixed plate; 63. stirring fork; 7. kettle cover; 8. vacuum tube; 9. first limit bar; 10. second limit bar; 11. side wheel; 12. guide plate; 13. positioning plate; 14. scraper; 15. observation window; 16. lighting lamp; 17. clamping assembly; 171. rack; 172. gear; 173. connecting rod; 174. pressing block; 175. fixing block; 18. handrail. DETAILED DESCRIPTION

[0056] The following will describe the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0057] Throughout the present application, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0059] In the description of the embodiments of this application, unless otherwise specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, integration, or mechanical connections. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this application based on specific circumstances.

[0060] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine the different embodiments or examples and features of the different embodiments or examples shown in the present application.

[0061] The present application discloses a low temperature vacuum stirring device. Figures 1 to 3 The stirring device includes a machine base 1, a mobile frame 2, a stirring tank 3, a cooling component 4, a lifting component 5, a stirring component 6, a kettle cover 7 and a vacuum tube 8. The machine base 1 serves as a carrier and the mobile frame 2 serves as a transportation tool for transporting the stirring tank 3. The mobile frame 2 includes a frame body 21, support rods 22, a load-bearing plate 23 and universal wheels 24. The universal wheels 24 are rotatably connected to the bottom of the frame body 21 and are distributed at intervals. In this embodiment, the number of universal wheels 24 is four. The presence of the universal wheels 24 enables rolling friction between the frame body 21 and the ground, thereby reducing friction. The support rods 22 are vertically fixed on the frame body 21, and several of them are arranged in parallel. The load-bearing plate 23 is fixedly connected to the end of each support rod 22 away from the frame body 21. The load-bearing plate 23 is used for horizontal placement of the stirring tank 3.

[0062] Among them, the bottom of the base 1 is fixedly connected with a first limiting bar 9 and a second limiting bar 10, and the first limiting bar 9 and the second limiting bar 10 are arranged in parallel. The two limiting bars are used to limit the mobile frame 2 so that the mobile frame 2 can be accurately parked between the first limiting bar 9 and the second limiting bar 10. In some embodiments, the frame body 21 is also rotatably connected with side wheels 11, and the first limiting bar 9 and the second limiting bar 10 are both fixedly connected with guide plates 12. The guide plates 12 are arranged along the length direction of the limiting bars, and the two guide plates 12 are parallel to each other. When the mobile frame 2 enters between the first limiting bar 9 and the second limiting bar 10, each side wheel 11 abuts against the two guide plates 12, and the side wheels 11 and the guide plates 12 cooperate with each other to play a role of guiding and limiting.

[0063] The mixing tank 3 is cylindrical and open. Handrails 18 are fixedly attached to the sidewalls of the mixing tank 3 to facilitate the application of pushing or pulling force by the operator. The mixing tank 3 comprises an outer shell and an inner shell. The outer and inner shells are coaxially arranged. The inner shell is fixedly attached to the interior of the outer shell, and a closed cavity is formed between the two to store cooling water.

[0064] The cooling assembly 4 includes an inlet pipe 41 and an outlet pipe 42, both made of flexible tubing. The inlet pipe 41 connects to the external cooling water tank and the cavity, respectively, at both ends. The outlet pipe 42 connects to the cooling water tank and the cavity, respectively. The end of the inlet pipe 41 connected to the mixing tank 3 is lower than the end of the outlet pipe 42 connected to the mixing tank 3. In other embodiments, the inlet pipe 41 and outlet pipe 42 may also be rigid metal pipes.

[0065] The lifting assembly 5 is mounted on the machine base 1 and is used to lift the mixing tank 3. The kettle cover 7 is mounted on the machine base 1 and is located above the lifting assembly 5; the kettle cover 7 is used to be sealed with the mixing tank 3, thereby sealing the opening of the mixing tank 3. A sealing ring can be provided on the end of the kettle cover 7 facing the mixing tank 3 to ensure the sealing between the kettle cover 7 and the mixing tank 3. Figure 4 Specifically, the lifting assembly 5 includes a guide rail 51, a lifting plate 52, a support plate 53, and a driving member 54. The guide rail 51 is fixedly connected to the machine base 1 in the vertical direction, and the lifting plate 52 is slidably connected to the guide rail 51. The support plate 53 is fixedly connected to the lifting plate 52 and is located directly below the kettle cover 7. The support plate 53 is used to support the mixing tank 3 on the mobile frame 2. The support plate 53 has a clearance hole on the bearing plate 23 for the support plate 53 to pass through, allowing the support plate 53 to pass through the bearing plate 23 from bottom to top and contact the bottom of the mixing tank 3.

[0066] The driver 54 is connected to the lift plate 52 and is used to control the vertical movement of the lift plate 52. The driver 54 is a lifting cylinder or oil cylinder; in this embodiment, it is a lifting cylinder. The cylinder has a stroke control mechanism that controls the cylinder piston rod to stop at a predetermined position, achieving precise mechanical actions (such as clamping, pushing, lifting, etc.) and providing continuous, stable, and reliable pressure. Typical stroke control mechanisms include, but are not limited to, mechanical stops, magnetic switches plus solenoid valves, and displacement sensors plus controllers. These are conventional techniques and are not described here.

[0067] Combine Figure 5 , the stirring assembly 6 is installed in the kettle cover 7 and is used to stir the material. The stirring assembly 6 includes a stirring motor 61, a fixed disk 62 and a stirring fork 63. The stirring motor 61 is installed on the machine base 1. The driving shaft of the stirring motor 61 is arranged in the vertical direction and is connected to the center of the fixed disk 62. The fixed disk 62 is a circular disk. The fixed disk 62 is located inside the kettle cover 7. The stirring fork 63 is fixedly connected to the fixed plate and is used to stir the material. One end of the vacuum tube 8 is connected to the kettle cover 7, and the other end is connected to an external vacuum pump or vacuum generator. The vacuum tube 8 is used to vacuum the stirring tank 3.

[0068] During production, the worker first places the empty mixing tank 3 on the mobile frame 2 and then adds the material to be mixed into the inner shell of the mixing tank 3. After adding, the worker holds the handrail 18 with both hands and applies a thrust to push the entire mobile frame 2 (there is static friction between the bottom of the mixing tank 3 and the mobile frame 2), so that the mixing tank 3 moves to a position directly below the kettle cover 7.

[0069] Then, the driving member 54 is operated to control the lifting plate 52 to move vertically upward along the guide rail 51. The support plate 53 is supported on the bottom of the mixing tank 3 and slowly rises, so that the mixing tank 3 gradually approaches the kettle cover 7. The mixing tank 3 moves vertically upward until the open end of the mixing tank 3 and the lower end of the kettle cover 7 are tightly fitted to form a closed space, and then the lifting plate 52 stops moving.

[0070] Then, connect the water inlet pipe 41 and the water outlet pipe 42 to the mixing tank 3. Both the water inlet pipe 41 and the water outlet pipe 42 are flexible pipes. The cooling water in the cooling water tank is pumped into the cavity of the mixing tank 3 along the water inlet pipe 41. The coolant fills the cavity from bottom to top and then flows out of the water outlet pipe 42, achieving cyclic cooling and lowering of the temperature of the mixing tank 3 by heat transfer.

[0071] At the same time, the external vacuum pump is started to extract the gas between the mixing tank 3 and the kettle cover 7 from the vacuum tube 8 to reduce the internal pressure and form a vacuum environment. Finally, the stirring component 6 is operated to stir the material, so that the entire stirring operation is carried out in a low-temperature vacuum environment to ensure the quality of the product.

[0072] According to some embodiments of the present application, a positioning plate 13 is optionally mounted on the fixed disk 62, and the positioning plate 13 is arranged along the length direction of the stirring fork 63; a scraper 14 is fixedly connected to the positioning plate 13, and the scraper 14 is used to scrape the material on the inner wall of the stirring tank 3. The scraper 14 is made of a flexible material, such as rubber or silicone, which can be deformed under force. When the stirring motor 61 drives the fixed disk 62 to rotate, the positioning plate 13 will also rotate, causing the scraper 14 to perform a circular motion, scraping off the material adhering to the inner wall of the stirring tank 3.

[0073] In this embodiment, the kettle cover 7 is provided with an opening extending therethrough, and an observation window 15 is sealed therein. The observation window 15 is made of a transparent material, such as glass. Multiple observation windows 15 are provided, and a light 16 is flexibly connected to the base 1. The light 16 is positioned adjacent to one of the observation windows 15 and is used to illuminate the interior of the mixing tank 3. While the material is being mixed, a worker can observe the mixing status of the mixing tank 3 through the observation window 15.

[0074] Furthermore, in some embodiments, reference Figure 6 and Figure 7A clamping assembly 17 is also installed on the lifting seat. The clamping assembly 17 is used to press the mixing tank 3 onto the support plate 53. The clamping assembly 17 includes a rack 171, a gear 172, a connecting rod 173, a pressure block 174 and a fixed block 175. The rack 171 is fixedly connected to one side of the lifting plate 52 and is vertically arranged. The length direction of the rack 171 is parallel to the moving direction of the lifting plate 52. The gear 172 is rotatably connected to the base 1, and the gear 172 and the rack 171 are meshed and connected. The connecting rod 173 is horizontally arranged along the rotation axis direction of the gear 172, and the length direction of the connecting rod 173 is parallel to the length direction of the first limit bar 9. The pressure block 174 is fixedly connected to the end of the connecting rod 173 away from the gear 172. The fixed block 175 is fixedly connected to the outer wall of the mixing tank 3 and is in the rotation path of the pressure block 174. The fixed block 175 is provided with a pressure groove for the pressure block 174 to abut.

[0075] When the lifting plate 52 moves vertically upward, the support plate 53 drives the mixing tank 3 to move in the direction close to the kettle cover 7; at this time, the rack 171 drives the gear 172 and the connecting rod 173 to rotate synchronously, and the pressure block 174 rotates along with the connecting rod 173 and gradually approaches the fixed block 175. When the upper end of the mixing tank 3 abuts the kettle cover 7, the lifting plate 52 no longer moves, but stays at the current position. At this time, the pressure block 174 abuts against the pressure groove of the fixed block 175, thereby exerting a downward pressure on the mixing tank 3 and improving the stability of the mixing tank 3 on the support plate 53. In this embodiment, the clamping assembly 17 is symmetrically arranged in two groups, with the two racks 171 located on both sides of the lifting seat, and the two pressure blocks 174 respectively pressing on both sides of the mixing tank 3. The two pressure blocks 174 act as a limiter for the mixing tank 3, preventing the mixing tank 3 from falling off the support plate 53, thereby improving production safety.

[0076] The low-temperature vacuum stirring device of the present embodiment operates as follows: During the production process, a worker first places an empty stirring tank 3 on a movable frame 2 and then adds the material to be stirred into the inner shell. After the material is added, the worker grips the handrails 18 with both hands and pushes the movable frame 2, moving the stirring tank 3 to directly below the kettle cover 7.

[0077] Subsequently, the driving member 54 is activated to control the lifting plate 52 to move vertically upward along the guide rail 51. The support plate 53 lifts the bottom of the mixing tank 3 and slowly raises it, gradually bringing the mixing tank 3 closer to the kettle cover 7 until the open end of the mixing tank 3 fits tightly against the lower end of the kettle cover 7, forming a closed space. At this time, the lifting plate 52 stops moving.

[0078] Next, connect the water inlet pipe 41 and the water outlet pipe 42 to the mixing tank 3. Both the water inlet and outlet pipes 42 are made of flexible tubing. The cooling water in the cooling water tank is pumped into the cavity of the mixing tank 3 through the water inlet pipe 41. After the coolant fills the cavity from bottom to top, it flows out of the water outlet pipe 42, achieving cyclic cooling and lowering of the temperature of the mixing tank 3 through heat transfer.

[0079] At the same time, the external vacuum pump is started to extract the gas between the mixing tank 3 and the kettle cover 7 through the vacuum pipe 8 to reduce the internal pressure and create a vacuum environment. Finally, the stirring component 6 is operated to stir the material, ensuring that the entire stirring process is carried out in a low-temperature vacuum environment, thereby ensuring product quality.

[0080] Based on the above embodiment, the embodiment of the present application further provides a stirring method, which uses a stirring device with all the above structures to stir the material, specifically comprising the following steps:

[0081] S1. The staff places the empty mixing tank 3 on the mobile frame 2, and then adds the material to be mixed into the inner shell of the mixing tank 3. After the material to be mixed is placed, the staff holds the handrail 18 with both hands and pushes the entire mobile frame 2, so that the mixing tank 3 moves to the bottom of the kettle cover 7.

[0082] S2. The driving member 54 is then operated to control the lifting plate 52 to move vertically upward along the guide rail 51. The support plate 53 rests on the bottom of the mixing tank 3 and slowly rises, so that the mixing tank 3 and the kettle cover 7 are tightly fitted together. Then, the lifting plate 52 stops moving. At this time, the pressing blocks 174 of the two pressing assemblies 17 will abut against the outer wall of the mixing tank 3, restricting the movement of the mixing tank 3.

[0083] S3. Then operate the cooling component 4. The cooling water in the cooling water tank flows into the cavity of the mixing tank 3 along the water inlet pipe 41 through the action of the water pump. The coolant fills the cavity from bottom to top and flows out from the water outlet pipe 42 to achieve circulating cooling and temperature reduction.

[0084] S4. Start the external vacuum pump to extract the gas in the stirring tank 3 from the vacuum tube 8 to reduce the internal pressure and form a vacuum environment.

[0085] S5. Finally, the stirring motor 61 is operated to enable the stirring fork 63 to fully stir the material in the stirring tank 3.

[0086] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A low-temperature vacuum stirring device, characterized in that: It includes a machine base (1), a mobile frame (2), a stirring tank (3), a cooling assembly (4), a lifting assembly (5), a stirring assembly (6), a kettle cover (7) and a vacuum tube (8); The stirring tank (3) is provided with an opening and is placed on the mobile frame (2), and a handrail (18) is connected to the side wall of the stirring tank (3); the stirring tank (3) comprises an outer shell and an inner shell, the outer shell and the inner shell are coaxially arranged, the inner shell is arranged inside the outer shell, and a cavity is formed between the two, and the cavity is used to store cooling water; The cooling assembly (4) comprises a water inlet pipe (41) and a water outlet pipe (42), the water inlet pipe (41) and the water outlet pipe (42) are both in communication with the cavity, and the connection between the water inlet pipe (41) and the stirring tank (3) is lower than the connection between the water outlet pipe (42) and the stirring tank (3); The lifting assembly (5) is provided on the machine base (1) and is used to lift the mixing tank (3); the kettle cover (7) is installed on the machine base (1) and is located above the lifting assembly (5); the kettle cover (7) is used to be sealed and connected to the mixing tank (3); The stirring assembly (6) is arranged in the kettle cover (7) and is used to stir the material; the vacuum tube (8) is connected to the kettle cover (7) and is used to vacuum the stirring tank (3); The lifting assembly (5) comprises a guide rail (51), a lifting plate (52), a support plate (53) and a driving member (54); the guide rail (51) is connected to the machine base (1) in a vertical direction; the lifting plate (52) is slidably connected to the guide rail (51); the support plate (53) is provided on the lifting plate (52) and is located directly below the kettle cover (7); the support plate (53) is used to support the mixing tank (3) on the movable frame (2); the driving member (54) is connected to the lifting plate (52) and is used to control the lifting plate (52) to move up and down; The machine also includes a pressing assembly (17), which is used to press the mixing tank (3) onto the support plate (53); the pressing assembly (17) includes a rack (171), a gear (172), a connecting rod (173), a pressing block (174) and a fixing block (175); the rack (171) is provided on one side of the lifting plate (52) and is vertically arranged; the gear (172) is rotatably connected to the machine base (1) and meshes with the rack (171); the connecting rod (173) is coaxially arranged on the gear (172); The pressing block (174) is connected to an end of the connecting rod (173) away from the gear (172), the fixing block (175) is provided on a side wall of the outer shell of the mixing tank (3), and a pressing groove for the pressing block (174) to abut is provided on the fixing block (175); When the lifting plate (52) moves vertically upward, the support plate (53) drives the mixing tank (3) to move in a direction close to the kettle cover (7); at this time, the rack (171) drives the gear (172) and the connecting rod (173) to rotate, and the pressing block (174) rotates following the connecting rod (173); When the upper end of the stirring tank (3) abuts against the kettle cover (7), the pressing block (174) rotates and abuts against the pressing groove of the fixed block (175); wherein the pressing components (17) are symmetrically arranged in two groups, and the two pressing components (17) are respectively arranged on both sides of the stirring tank (3).

2. A low-temperature vacuum stirring device according to claim 1, characterized in that: The stirring assembly (6) comprises a stirring motor (61), a fixed disk (62) and a stirring fork (63), wherein the stirring motor (61) is arranged on the machine base (1), a driving shaft of the stirring motor (61) is connected to the fixed disk (62), the fixed disk (62) is located inside the kettle cover (7), and the stirring fork (63) is arranged on the fixed disk (62) and is used to stir the material.

3. A low-temperature vacuum stirring device according to claim 2, characterized in that: It also includes a positioning plate (13) and a scraper (14), wherein the positioning plate (13) is connected to the fixed disk (62), and the scraper (14) is connected to the positioning plate (13) and is used to scrape off materials on the inner wall of the mixing tank (3), and the scraper (14) is made of a flexible material.

4. A low-temperature vacuum stirring device according to claim 1, characterized in that: The mobile frame (2) includes a frame body (21), a support rod (22), a load-bearing plate (23) and universal wheels (24). The universal wheels (24) are rotatably connected to the bottom of the frame body (21) and are spaced apart. The support rod (22) is provided on the frame body (21). The load-bearing plate (23) is connected to one end of the support rod (22) away from the frame body (21) and is used for placing the mixing tank (3). The load-bearing plate (23) is provided with a clearance hole for the support plate (53) to pass through.

5. A low-temperature vacuum stirring device according to claim 4, characterized in that: A first limiting strip (9) and a second limiting strip (10) are connected to the machine base (1); the first limiting strip (9) and the second limiting strip (10) are arranged in parallel and are used to limit the movable frame (2).

6. A low-temperature vacuum stirring device according to claim 5, characterized in that: The frame (21) is also rotatably connected to a side wheel (11), and the first limit bar (9) and the second limit bar (10) are both connected to a guide plate (12), and the two guide plates (12) are parallel to each other; when the mobile frame (2) enters between the two limit bars, the side wheel (11) abuts against the guide plate (12).

7. A low-temperature vacuum stirring device according to claim 1, characterized in that: The kettle cover (7) further comprises an observation window (15) and a lighting lamp (16). An opening is provided through the kettle cover (7). The observation window (15) is sealed at the opening. The observation windows (15) are made of a transparent material and are provided in plurality. The lighting lamp (16) is located near one of the observation windows (15) and is used to illuminate the interior of the stirring tank (3).

8. A stirring method for producing products using the low-temperature vacuum stirring device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. After the material to be mixed is placed inside the mixing tank (3), the staff member holds the handrail (18) with both hands and applies force to push the entire mobile frame (2) so that the mixing tank (3) moves to the bottom of the kettle cover (7); S2, then operate the lifting assembly (5), the lifting assembly (5) slowly lifts the mixing tank (3) and moves it vertically upward in a direction close to the kettle cover (7), so that the mixing tank (3) and the kettle cover (7) are tightly fitted; S3, then operate the cooling component (4), and the external cooling water flows into the cavity of the mixing tank (3) through the water inlet pipe (41), and the cooling water fills the cavity from bottom to top and flows out from the water outlet pipe (42), thereby achieving circulating cooling and temperature reduction; S4, starting the external vacuum pump to extract the gas in the mixing tank (3) from the vacuum tube (8) to reduce the internal pressure and form a vacuum environment; S5. Finally, the stirring assembly (6) is operated to fully stir the materials in the stirring tank (3).

Images