A stand mixer

Abstract

The present application relates to a kind of vertical lifting mixer, including transmission case and lifting assembly, transmission case is provided with several outputs, the output of transmission case is connected respectively first stirring assembly and second stirring assembly, the bottom of transmission case is fixed with bearing cavity, bearing cavity is used to support first stirring assembly and second stirring assembly stable rotation simultaneously;The bottom of transmission case is also sealed installation metal bellows, the bottom of metal bellows is concentrically installed with vacuum cavity and container, the internal space of metal bellows, vacuum cavity and container is interconnected, metal bellows surrounds bearing cavity, the vacuum cavity is connected with vacuumizing equipment, the container is used to hold material.By setting metal bellows and sealing ring, the vacuum degree inside vertical lifting mixer working cavity can be guaranteed using static seal mode, while black impurities can be avoided, product quality is guaranteed;At the same time, sealing structure is simple, and convenient later disassembly and maintenance.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and in particular to a vertical lifting mixer. Background Technology

[0002] Adhesives are used to bond homogeneous or heterogeneous surfaces together, suitable for joining different materials, thicknesses, ultra-thin dimensions, and complex components. High-viscosity adhesives are typically prepared using vacuum lifting and stirring equipment. This equipment disperses high-viscosity materials by stirring, and its stirring and dispersing shaft can both rotate and reciprocate, offering advantages such as high stirring efficiency and good degassing. It is suitable for high-solids mixing conditions and meets the performance requirements of the stirring equipment due to the high viscosity of the materials. However, due to the vacuum requirements of the adhesive preparation process, the sealing structure with simultaneous lifting and stirring generally suffers from poor vacuum levels.

[0003] In existing technologies, the lifting unit of a mixing device typically employs a contact-type dynamic sealing structure, such as a packing seal. This sealing structure allows the container to move up or down relative to the mixing shaft while ensuring sealing performance. However, during powder-liquid mixing processes, micron-sized powder particles can easily drift and enter the gap between the seal and the mixing shaft. After being squeezed and rubbed, these particles form black impurities that fall into the container, affecting the quality of subsequent products. Furthermore, conventional contact-type dynamic sealing structures are complex, making disassembly and maintenance difficult. Summary of the Invention

[0004] To address the shortcomings of existing production technologies, the inventor provides a vertical lifting mixer. By incorporating a metal bellows and sealing rings, a static sealing method is used to ensure the vacuum level inside the working chamber of the vertical lifting mixer, while simultaneously preventing the generation of black impurities and ensuring product quality. Furthermore, the sealing structure is simple and convenient for subsequent disassembly and maintenance.

[0005] The technical solution adopted in this invention is as follows:

[0006] A vertical lifting mixer includes a transmission box and a lifting assembly. The transmission box is provided with several output ends, which are respectively connected to a first mixing assembly and a second mixing assembly. A bearing cavity is fixed at the bottom of the transmission box, which is used to simultaneously support the stable rotation of the first mixing assembly and the second mixing assembly.

[0007] The bottom of the transmission box is also sealed with a metal bellows. A vacuum chamber and a container are concentrically installed at the bottom of the metal bellows. The internal spaces of the metal bellows, the vacuum chamber and the container are interconnected. The metal bellows surrounds the bearing cavity. The vacuum chamber is connected to a vacuum pumping device. The container is used to hold materials.

[0008] The lifting assembly drives the container to reciprocate linearly in the vertical direction. The metal bellows enables the vacuum chamber and the container to reciprocate linearly in the vertical direction. At the same time, the transmission box drives the first stirring assembly and the second stirring assembly to rotate, thereby stirring the material in the container.

[0009] As a further improvement to the above technical solution:

[0010] Sealing rings are used to achieve sealed installation between the transmission box and the metal bellows, between the metal bellows and the vacuum chamber, and between the vacuum chamber and the container.

[0011] The metal bellows is made of stainless steel, and the metal bellows elastic sheets are connected by laser welding.

[0012] The side wall of the vacuum chamber is provided with a sight glass and a vacuum extraction port. The sight glass is used to observe the state of the material inside the container. The vacuum chamber is connected to a vacuum pumping device through the vacuum extraction port.

[0013] The first stirring assembly includes a first main shaft and a stirring paddle fixed to the end of the first main shaft;

[0014] The second stirring assembly includes a second main shaft and a dispersing disc fixed to the end of the second main shaft.

[0015] A temperature measuring shaft is fixed inside the bearing cavity, with its end extending outside the bearing cavity. A temperature measuring instrument is also installed at the end of the temperature measuring shaft to detect the temperature of the material in the container.

[0016] The vacuum chamber and container are arranged in a vertical, top-to-bottom stacked sequence.

[0017] The transmission box and lifting assembly are both mounted on the support frame.

[0018] The lifting assembly includes a lifting device, the output end of which is connected to a bracket, which is used to lift the container.

[0019] There is a gap L between the outer wall of the bearing cavity and the inner wall of the metal bellows, and the gap L is set in accordance with the following formula:

[0020] L>X1+X2+3 (Equation 1)

[0021] In Equation 1, L represents the gap between the outer wall of the bearing cavity and the inner wall of the metal bellows.

[0022] X1 represents the maximum radial installation error value of the metal bellows;

[0023] X2 represents the maximum radial installation error value of the bearing cavity.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention features a compact and reasonable structure, and is easy to operate. By incorporating a metal bellows and sealing ring, it can maintain the vacuum level inside the working chamber of the vertical lifting mixer through a static sealing method, while also preventing the generation of black impurities and ensuring product quality. Furthermore, the sealing structure is simple and facilitates subsequent disassembly and maintenance.

[0026] By incorporating a metal bellows, this invention transforms the dynamic sealing method used in traditional vertical lifting mixers into a static sealing method, thereby effectively ensuring the vacuum requirements in the production process.

[0027] In this invention, by integrating the first main shaft, the second main shaft, and the temperature measuring shaft into the bearing cavity, and forming a gap L between the outer wall of the bearing cavity and the inner wall of the metal bellows, the solid components (i.e. powder) in the material can be prevented from rubbing against each other in the gap, thereby avoiding the generation of black impurities and improving product quality.

[0028] The present invention provides a vertical lifting mixer with good overall sealing. The bottom wall of the transmission box is bolted to the metal bellows, the metal bellows to the vacuum chamber, and the vacuum chamber to the container. Static sealing is achieved through sealing rings, which facilitates disassembly and cleaning and simplifies maintenance. Attached Figure Description

[0029] Figure 1 This is the front view of the present invention.

[0030] Figure 2 This is the right view of the present invention.

[0031] Figure 3 for Figure 2 A partial full sectional view at point A in the middle.

[0032] Figure 4 This is a schematic diagram of the installation structure of the metal bellows and the vacuum cavity in this invention.

[0033] Figure 5 This is a schematic diagram of the structure of the metal bellows in this invention.

[0034] Figure 6 This is a comparison image of the metal bellows before and after compression in this invention.

[0035] The components are: 1. Transmission box; 2. Metal bellows; 3. Bearing cavity; 4. Support frame; 5. Container; 6. First main shaft; 7. Second main shaft; 8. Temperature measuring shaft; 9. Lifting device; 10. Sight glass port; 11. Vacuum port; 12. Vacuum chamber; 13. Bracket; 14. Sealing ring. Detailed Implementation

[0036] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] Traditional vertical lifting mixers need to meet the requirements of vertical lifting of the container and the sealing performance of the internal space of the container. Traditional static sealing devices (such as sealing rings and sealing rings) are difficult to meet the working requirements of vertical lifting mixers. On the other hand, relying on contact dynamic sealing structures will cause solid particles inside the material to turn black due to friction, which will affect product quality.

[0038] Based on this, the present invention proposes a vertical lifting mixer, which aims to solve the problems of traditional vertical lifting mixers, such as poor sealing performance, low glue quality, and cumbersome disassembly and maintenance procedures.

[0039] like Figures 1-6 As shown, a vertical lifting mixer includes a transmission box 1 and a lifting assembly. The transmission box 1 has several output ends, which are respectively connected to a first stirring assembly and a second stirring assembly. A bearing cavity 3 is fixed at the bottom of the transmission box 1, which is used to simultaneously support the stable rotation of the first stirring assembly and the second stirring assembly. A metal bellows 2 is also sealed and installed at the bottom of the transmission box 1. A vacuum chamber 12 and a container 5 are concentrically installed at the bottom of the metal bellows 2. The internal spaces of the metal bellows 2, the vacuum chamber 12, and the container 5 are interconnected. The metal bellows 2 surrounds the bearing cavity 3. The vacuum chamber 12 is connected to a vacuum pump. The container 5 is used to hold materials. The lifting assembly drives the container 5 to reciprocate linearly in the vertical direction. The metal bellows 2 enables the vacuum chamber 12 and the container 5 to reciprocate linearly in the vertical direction. At the same time, the transmission box 1 drives the first stirring assembly and the second stirring assembly to rotate, thereby stirring the materials in the container 5.

[0040] Sealing rings 14 are used to achieve sealed installation between transmission box 1 and metal bellows 2, between metal bellows 2 and vacuum chamber 12, and between vacuum chamber 12 and container 5.

[0041] The metal bellows 2 is made of stainless steel, and the metal bellows elastic sheets of the metal bellows 2 are connected by laser welding.

[0042] The side wall of the vacuum chamber 12 is provided with a sight glass 10 and a vacuum extraction port 11. The sight glass 10 is used to observe the state of the material in the container 5. The vacuum chamber 12 is connected to the vacuum pumping equipment through the vacuum extraction port 11.

[0043] The first stirring assembly includes a first main shaft 6 and a stirring paddle fixed to the end of the first main shaft 6;

[0044] The second stirring assembly includes a second main shaft 7 and a dispersing disc fixed to the end of the second main shaft 7.

[0045] A temperature measuring shaft 8 is fixed inside the bearing cavity 3. The end of the temperature measuring shaft 8 extends out of the bearing cavity 3. At the same time, a temperature measuring instrument is installed at the end of the temperature measuring shaft 8. The temperature measuring instrument is used to detect the temperature of the material in the container 5.

[0046] The vacuum chamber 12 and the container 5 are arranged in a vertical stack from top to bottom.

[0047] Both the transmission box 1 and the lifting assembly are mounted on the support frame 4.

[0048] The lifting assembly includes a lifting device 9, the output end of which is connected to a bracket 13, which is used to lift the container 5.

[0049] The specific structure and function of this invention are as follows:

[0050] The present invention provides a vertical lifting mixer, comprising a transmission box 1, a lifting assembly, a metal bellows 2, a bearing cavity 3, a support frame 4, a container 5, a vacuum chamber 12, a sealing ring 14, a first stirring assembly, and a second stirring assembly; wherein,

[0051] The support frame 4 is an integral support frame, with the transmission box 1 fixed at the top and a lifting component installed on the side;

[0052] The lifting assembly is used to drive the container 5 to move in a straight line in the vertical direction, and includes the lifting device 9 and the bracket 13.

[0053] The transmission box 1 is equipped with a first variable frequency motor and a second variable frequency motor. The output end of the first variable frequency motor is connected to the first main shaft 6 in the first stirring assembly through the first gearbox, and the output end of the second variable frequency motor is connected to the second main shaft 7 in the second stirring assembly through the second gearbox.

[0054] The first variable frequency motor drives the first main shaft 6 to rotate, thereby driving the stirring paddle to rotate; the second variable frequency motor drives the second main shaft 7 to rotate, thereby driving the dispersing disc to rotate.

[0055] like Figures 1-3 As shown, the metal bellows 2, vacuum chamber 12, and container 5 are arranged concentrically from top to bottom along the vertical direction. At the same time, the internal cavities of the metal bellows 2, vacuum chamber 12, and container 5 are interconnected, and the internal cavities are sealed by the sealing ring 14 to meet the vacuum requirements during production and use.

[0056] like Figure 5 As shown, the metal bellows 2 is made of 316L stainless steel. The connection between the metal bellows elastic sheets of the metal bellows 2 is achieved using laser welding technology, which gives the metal bellows 2 good overall elasticity and vacuum resistance. Figure 3 , Figure 6As shown, the maximum compression length L1 of the metal bellows 2 is greater than the stroke length h of a single rise or fall during the reciprocating lifting and lowering process of the container 5, thereby ensuring that the container 5 can smoothly complete the reciprocating lifting and lowering action.

[0057] A sight glass port 10 and a vacuum extraction port 11 are provided on the side wall of the vacuum chamber 12. The vacuum extraction port 11 is connected to a vacuum pumping device, thereby creating a vacuum in the internal cavity of the metal bellows 2, the vacuum chamber 12, and the container 5.

[0058] The bearing cavity 3 is used to support the rotation of the first spindle 6 and the second spindle 7. In addition, a temperature measuring shaft 8 is fixedly installed inside the bearing cavity 3.

[0059] Several bearings are installed inside the bearing cavity 3. The bearings enable the rotational installation between the first main shaft 6 and the bearing cavity 3, and between the second main shaft 7 and the bearing cavity 3. By setting the bearing cavity 3, the working stability of the first stirring assembly and the second stirring assembly can be guaranteed.

[0060] One end of the first spindle 6, the second spindle 7, and the temperature measuring spindle 8 are all integrated into the bearing cavity 3, while the other end of the spindle extends to the outside of the bearing cavity 3.

[0061] The bearing cavity 3, the first main shaft 6, the second main shaft 7, and the temperature measuring shaft 8 are all located inside the metal bellows 2, the vacuum cavity 12, and the container 5.

[0062] The bearing cavity 3 is installed at a position corresponding to the metal bellows 2, and the bearing cavity 3 and the metal bellows 2 are arranged concentrically, as shown below. Figure 3 As shown, in this embodiment of the vertical lifting mixer, there is a gap L between the outer wall of the bearing cavity 3 and the inner wall of the metal bellows 2. The gap L is set to satisfy the following formula:

[0063] L>X1+X2+3 (Equation 1)

[0064] In Equation 1, L represents the gap between the outer wall of the bearing cavity 3 and the inner wall of the metal bellows 2.

[0065] X1 represents the maximum radial installation error value of the metal bellows 2;

[0066] X2 represents the maximum radial installation error value of bearing cavity 3.

[0067] In this invention, the gap L is in the range of 3mm-5mm. By setting the gap L, the relative movement between the bearing cavity 3 and the metal bellows 2 can be ensured. Furthermore, since the gap L is much larger than the diameter of the solid particles in the material (micrometer level), the friction of the solid particles in the material within the gap L can be effectively avoided, thereby effectively avoiding black impurities caused by friction and improving product quality.

[0068] In this invention, static seals in the form of sealing rings 14 are used between the transmission box 1 and the metal bellows 2, between the metal bellows 2 and the vacuum chamber 12, and between the vacuum chamber 12 and the container 5, which can completely guarantee the sealing effect. The lifting and lowering movement of the container 5 and the vacuum chamber 12 is achieved by the metal bellows 2.

[0069] The present invention provides a vertical lifting mixer that solves the problems of poor sealing performance caused by simultaneous lifting and stirring, resulting in poor internal vacuum, and the problem of solid particles in the material flying into the gaps of the sealing components and generating frictional impurities. By setting up a metal bellows 2, a vacuum chamber 12, and a container 5 to form a sealed space through static sealing, the vacuum requirements during production and use can be met.

[0070] The working process of this invention is as follows:

[0071] First, place container 5 on bracket 13. Container 5 is fixed to bracket 13 by quick clamps. Lifting device 9 is fastened to bracket 13.

[0072] Subsequently, the lifting device 9 is started, and the container 5 is driven to move vertically upward in a straight line through the bracket 13 until the upper end face of the container 5 contacts and overlaps with the lower end face of the vacuum chamber 12, and the container 5 is fixed to the vacuum chamber 12 by bolts.

[0073] Next, the powder and liquid materials for preparing the adhesive are added into the container 5 through the inlet provided on the side wall of the vacuum chamber 12;

[0074] Then, the first variable frequency motor and the second variable frequency motor in the transmission box 1 start, thereby driving the first stirring component and the second stirring component to stir the material in the container 5 respectively;

[0075] While stirring, container 5 reciprocates in a straight line along the vertical direction via lifting device 9, with a stroke length of h for a single upward or downward movement;

[0076] After mixing is completed, the lifting device 9 drives the container 5 to move vertically downward in a straight line through the bracket 13 until the casters of the container 5 contact the workbench surface. Finally, the mixed material in the container 5 is discharged through the discharge port set on the side wall of the container 5.

[0077] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A vertical lifting mixer, comprising a transmission box (1) and a lifting assembly, wherein the transmission box (1) is provided with a plurality of output ends, the output ends of the transmission box (1) being respectively connected to a first stirring assembly and a second stirring assembly, characterized in that: The bottom of the transmission box (1) is fixed with a bearing cavity (3), which is used to simultaneously support the stable rotation of the first stirring assembly and the second stirring assembly. The bottom of the transmission box (1) is also sealed with a metal bellows (2). A vacuum chamber (12) and a container (5) are concentrically installed at the bottom of the metal bellows (2). The internal spaces of the metal bellows (2), the vacuum chamber (12) and the container (5) are interconnected. The metal bellows (2) surrounds the bearing cavity (3). The vacuum chamber (12) is connected to a vacuum pumping device. The container (5) is used to hold materials. The lifting assembly drives the container (5) to reciprocate linearly in the vertical direction. The metal bellows (2) enables the vacuum chamber (12) and the container (5) to reciprocate linearly in the vertical direction. At the same time, the transmission box (1) drives the first stirring assembly and the second stirring assembly to rotate, thereby stirring the material in the container (5). There is a gap L between the outer wall of the bearing cavity (3) and the inner wall of the metal bellows (2), and the gap L is set in accordance with the following formula: L>X1+X2+3 (Equation 1) In Equation 1, L represents the gap between the outer wall of the bearing cavity (3) and the inner wall of the metal bellows (2), and the unit of L is mm. X1 represents the maximum radial installation error value of the metal bellows (2); X2 represents the maximum radial installation error value of the bearing cavity (3).

2. The vertical lifting mixer as described in claim 1, characterized in that: The transmission box (1) and the metal bellows (2), the metal bellows (2) and the vacuum chamber (12), and the vacuum chamber (12) and the container (5) are all sealed by sealing rings (14).

3. A vertical lifting mixer as described in claim 1, characterized in that: The metal corrugated pipe (2) is made of stainless steel, and the metal corrugated elastic sheets of the metal corrugated pipe (2) are connected by laser welding process.

4. A vertical lifting mixer as described in claim 1, characterized in that: The side wall of the vacuum chamber (12) is provided with a sight glass (10) and a vacuum extraction port (11). The sight glass (10) is used to observe the state of the material in the container (5). The vacuum chamber (12) is connected to the vacuum pumping equipment through the vacuum extraction port (11).

5. A vertical lifting mixer as described in claim 1, characterized in that: The first stirring assembly includes a first main shaft (6) and a stirring paddle fixed to the end of the first main shaft (6); The second stirring assembly includes a second main shaft (7) and a dispersing disc fixed to the end of the second main shaft (7).

6. A vertical lifting mixer as described in claim 1, characterized in that: A temperature measuring shaft (8) is fixed inside the bearing cavity (3). The end of the temperature measuring shaft (8) extends out of the bearing cavity (3). At the same time, a temperature measuring instrument is installed at the end of the temperature measuring shaft (8). The temperature measuring instrument is used to detect the temperature of the material in the container (5).

7. A vertical lifting mixer as described in claim 1, characterized in that: The vacuum chamber (12) and the container (5) are arranged in a vertical manner from top to bottom.

8. A vertical lifting mixer as described in claim 1, characterized in that: The transmission box (1) and the lifting assembly are both installed on the support frame (4).

9. A vertical lifting mixer as described in claim 1, characterized in that: The lifting assembly includes a lifting device (9), the output end of which is connected to a bracket (13), which is used to lift the container (5).

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