Internal mixer with leakage and pinch protection

Abstract

The application discloses a mixer with leakage-proof and pinch-proof functions, which comprises two pairs of shaft holes corresponding to each other and arranged on the same straight line on the two side walls of a mixing chamber; a rotating shaft is arranged in the shaft holes; a plurality of spiral-shaped blade edges are arranged on the rotating shaft; the two side end faces of the spiral-shaped blade edges on the rotating shaft are provided with concave platforms which are recessed inward; the end part of the concave platform away from the concave platform on the opposite side is arranged in a spaced manner from the peripheral wall of the rotating shaft; a wear-resistant sleeve is sleeved on the rotating shaft and abuts against the end part of the concave platform; the wear-resistant sleeve covers the gap between the concave platform and the rotating shaft; a leakage-proof and pinch-proof top sleeve is sleeved on the rotating shaft and abuts against the side of the wear-resistant sleeve away from the concave platform; a cover is provided with a through hole, the rotating shaft is arranged in the through hole, and the cover abuts against the side of the leakage-proof and pinch-proof top sleeve away from the wear-resistant sleeve, so as to position the wear-resistant sleeve and the leakage-proof and pinch-proof top sleeve. The concave platform, the wear-resistant sleeve and the leakage-proof and pinch-proof top sleeve are arranged in sequence on the end part of the spiral-shaped blade edge, so that the impurities from the outside and the internal material leakage are effectively prevented.

Description

Technical Field

[0001] This application relates to the technical field of internal mixers, and in particular to an internal mixer with anti-leakage and anti-pinch functions. Background Technology

[0002] Internal mixers are widely used in the industrial production of rubber, plastics, and other products, primarily for mixing and plasticizing various raw materials. They achieve this by using the extrusion and shearing action of two rotating shafts at a specific speed to thoroughly mix the rubber compound. The performance of the internal mixer directly affects product quality and production efficiency; therefore, improving its performance has always been a key focus in the industry.

[0003] Traditional internal mixer shaft seals typically employ a planar contact design. However, this design presents numerous problems in practical applications. For instance, when processing powdery materials, leakage is prone to occur, leading to material waste and environmental pollution. Furthermore, powder can easily enter the sealing surface of the mechanical seal, and repeated friction can cause wear, resulting in further leakage. On the other hand, molten rubber compounds can easily enter the gaps in the sealing device; upon cooling and solidifying, they can fill the sealing surface, causing mechanical seal failure and frequent malfunctions. These problems not only increase production costs but also affect production efficiency and the working environment.

[0004] To overcome the shortcomings of existing technologies, improve the performance and production efficiency of internal mixers, and reduce production costs and environmental pollution, there is an urgent market demand for a simple, well-sealed, and long-service-life internal mixer shaft leak-proof device. Simultaneously, as industrial production demands increasingly higher levels of equipment safety and reliability, internal mixers also need to possess safety features such as anti-pinch functions to ensure the personal safety of operators and meet the safety production needs of modern factories. Utility Model Content

[0005] The purpose of this application is to provide a mixing machine with a simple structure and the ability to provide anti-leakage and anti-pinch functions.

[0006] This application provides a mixing mill with anti-leakage and anti-pinch functions, the mixing mill comprising:

[0007] The mixing chamber has corresponding shaft holes on both sides of its side walls, which are aligned in a straight line.

[0008] The rotating shaft passes through the shaft holes on both sides. The rotating shaft is provided with several spiral blades. Both ends of the spiral blades on the rotating shaft are provided with inwardly recessed platforms. The ends of the platforms away from the opposite platforms are spaced apart from the peripheral wall of the rotating shaft.

[0009] Wear-resistant sleeve, the wear-resistant sleeve is fitted onto the rotating shaft and abuts against the end of the recess, the wear-resistant sleeve covers the gap between the recess and the rotating shaft;

[0010] Leak-proof and anti-pinch top sleeve is fitted onto the rotating shaft and abuts against the side of the wear-resistant sleeve away from the recess.

[0011] The pressure cap has a through hole, through which the rotating shaft passes. The pressure cap and the anti-leakage and anti-pinch top sleeve are abutted on the side away from the wear-resistant sleeve to position the wear-resistant sleeve and the anti-leakage and anti-pinch top sleeve.

[0012] Furthermore, the concave platform and the spiral blade are integrally formed.

[0013] Furthermore, at least two spiral blades are spaced apart, and a concave platform is formed on the opposite side of the spiral blades. The diameter of the concave platform gradually decreases from the opposite side of the spiral blades to the opposite side of the spiral blades, and the end of the concave platform is provided with a columnar structure.

[0014] Furthermore, there are two sets of both the wear-resistant sleeve and the leak-proof and anti-pinch top sleeve, which are symmetrically arranged along the center of the rotating shaft.

[0015] Furthermore, the wear-resistant sleeve is a wear-resistant copper sleeve.

[0016] Furthermore, the wear-resistant sleeve and the anti-leakage and anti-pinch top sleeve have the same inner and outer diameters, and the outer diameter of the wear-resistant sleeve is the same as the diameter of the shaft hole. When the wear-resistant sleeve and the anti-leakage and anti-pinch top sleeve are fitted onto the rotating shaft, the outer side wall of the wear-resistant sleeve and the outer side wall of the anti-leakage and anti-pinch top sleeve abut against the side wall at the shaft hole, so as to realize the sequential nesting of the shaft hole, the wear-resistant sleeve, the anti-leakage and anti-pinch top sleeve and the rotating shaft.

[0017] Furthermore, the two side walls of the mixing chamber are provided with two sets of corresponding shaft holes that are on the same straight line. In the shaft holes of the two shafts, each set of shaft holes is provided with a set of wear-resistant sleeves and leak-proof and anti-pinch top sleeves at both ends.

[0018] Furthermore, the pressure cap has two through holes spaced apart, and two rotating shafts are respectively inserted into the two through holes; there are two pressure caps, which are symmetrically arranged along the center of the rotating shafts.

[0019] Furthermore, the outer diameter of the gland is larger than the outer diameter of the wear-resistant sleeve.

[0020] Furthermore, the internal mixer also includes a fixed base with mounting holes, through which the rotating shaft passes. One side wall of the fixed base is sandwiched between the outer wall of the mixing chamber and the pressure cap.

[0021] Unlike existing technologies, this application features an inwardly recessed platform at the end of the spiral blade, with the end of the platform spaced apart from the peripheral wall of the rotating shaft. This inclined platform prevents internal material from leaking out. Furthermore, this application sequentially abuts against a wear-resistant sleeve, a leak-proof and anti-pinch top sleeve, and a pressure cap, covering the gap between the platform and the shaft hole sidewall, effectively preventing external impurities from entering. The optimized structural design also includes an anti-pinch function. The internal mixer of this application has a simple and compact structural design, with each component nested sequentially, facilitating installation, manufacturing, and maintenance, thus reducing production costs and maintenance difficulty.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the internal mixer with anti-leakage and anti-pinch functions according to this application;

[0025] Figure 2 yes Figure 1 Top view of a medium internal mixer;

[0026] Figure 3 yes Figure 2 A schematic cross-sectional view of the internal mixer along the AA direction;

[0027] Figure 4 yes Figure 3 Installation diagram of the transfer shaft, wear-resistant sleeve, leak-proof and anti-pinch top sleeve, and pressure cap;

[0028] Figure 5 yes Figure 4 A schematic diagram of the exploded structure;

[0029] Icon labels:

[0030] 1-Internal mixer; 10-Internal mixing chamber; 20-Rotating shaft; 21-Helical blade; 22-Concave platform; 30-Wear-resistant sleeve; 40-Leak-proof and anti-pinch top sleeve; 50-Pressure cover; 51-Through hole; 60-Fixed seat; 61-Mounting hole. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this application, the internal mixer with anti-leakage and anti-pinch functions provided in this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0033] Because the existing internal mixer shaft sealing structure is prone to material leakage and does not have an anti-pinch function, this application provides an internal mixer with anti-leakage and anti-pinch functions, which adopts a nested concave platform, wear-resistant sleeve, anti-leakage and anti-pinch top sleeve and pressure cover to effectively prevent external impurities from entering and internal materials from leaking out, while also providing an anti-pinch function.

[0034] Please see Figures 1-5 , Figure 1 This is a schematic diagram of the structure of an embodiment of the internal mixer with anti-leakage and anti-pinch functions according to this application; Figure 2 yes Figure 1 Top view of a medium internal mixer; Figure 3 yes Figure 2 A schematic cross-sectional view of the internal mixer along the AA direction; Figure 4 yes Figure 3 Installation diagram of the transfer shaft, wear-resistant sleeve, leak-proof and anti-pinch top sleeve, and pressure cap; Figure 5 yes Figure 4 A schematic diagram of the explosion structure.

[0035] like Figures 1-5 As shown, the internal mixer 1 of this application includes a mixing chamber 10, a rotating shaft 20, a wear-resistant sleeve 30, a leak-proof and anti-pinch top sleeve 40, and a pressure cover 50.

[0036] Specifically, the two side walls of the mixing chamber 10 are provided with corresponding shaft holes (not shown in the figure) that are on the same straight line. The rotating shaft 20 passes through the shaft holes on both sides. The rotating shaft 20 is provided with a number of spiral blades 21. Both end faces of the spiral blades 21 on the rotating shaft 20 are provided with recessed platforms 22. The ends of the platforms 22 away from the opposite platform 22 are spaced apart from the peripheral wall of the rotating shaft 20.

[0037] In this embodiment, a recessed platform 22 is formed on the opposite side of the spiral blade 21. The diameter of the recessed platform 22 gradually decreases from the opposite side of the spiral blade 21 to the side opposite to the spiral blade 21, and the end of the recessed platform 22 is provided with a columnar structure. That is, the recessed platform 22 in this embodiment forms an inward slope, and when the material located between the spiral blade 21 moves to the recessed platform 22, it slides back to its original position through the slope.

[0038] Optionally, in this embodiment, there are at least two spiral blade ribs 21, which are spaced apart. The slopes of the recesses 22 at the ends of the at least two spiral blade ribs 21 are arranged opposite each other, and the recesses 22 on the side of the at least two spiral blade ribs 21 that do not have recesses 22 are spaced apart from the recesses 22 on the other side.

[0039] like Figure 5 As shown, the recessed platform 22 and the spiral blade 21 in this embodiment are integrally formed, which can be formed by one-time casting, simplifying the operation.

[0040] The wear-resistant sleeve 30 is fitted onto the rotating shaft 20 and abuts against the end of the recess 22. The wear-resistant sleeve 30 covers the gap between the recess 22 and the rotating shaft 20. The anti-leakage and anti-pinch top sleeve 40 is fitted onto the rotating shaft 20 and abuts against the side of the wear-resistant sleeve 30 away from the recess 22. The pressure cover 50 has a through hole 51. The rotating shaft 20 passes through the through hole 51, and the pressure cover 50 abuts against the side of the anti-leakage and anti-pinch top sleeve 40 away from the wear-resistant sleeve 30 to position the wear-resistant sleeve 30 and the anti-leakage and anti-pinch top sleeve 40.

[0041] Optionally, in this embodiment, there are two sets of wear-resistant sleeves 30 and leak-proof and anti-pinch top sleeves 40, which are symmetrically arranged along the center of the rotating shaft 20. Each set of leak-proof and anti-pinch top sleeves 40, wear-resistant sleeves 30 and recesses 22 are arranged to abut against each other in sequence.

[0042] In this embodiment, the wear-resistant sleeve 30 is specifically a wear-resistant copper sleeve, which has good wear resistance and corrosion resistance. It can withstand the friction of the rotating shaft 20 under high-speed rotation and shearing action, thus extending the service life of the internal mixer 1 and reducing the downtime and maintenance frequency of the equipment.

[0043] The wear-resistant sleeve 30 and the leak-proof and anti-pinch top sleeve 40 have the same inner and outer diameters, and the outer diameter of the wear-resistant sleeve 30 is the same as the diameter of the shaft hole. When the wear-resistant sleeve 30 and the leak-proof and anti-pinch top sleeve 40 are fitted onto the rotating shaft 20, the outer side wall of the wear-resistant sleeve 30 and the outer side wall of the leak-proof and anti-pinch top sleeve 40 abut against the side wall at the shaft hole, so as to realize the sequential nesting of the shaft hole, the wear-resistant sleeve 30, the leak-proof and anti-pinch top sleeve 40 and the rotating shaft 20.

[0044] like Figures 1-5As shown, in this embodiment, there are two rotating shafts 20. The two side walls of the mixing chamber 10 are provided with two sets of corresponding shaft holes that are on the same straight line. In the shaft holes of the corresponding sets of the two rotating shafts 20, each set of rotating shafts 20 is provided with a set of wear-resistant sleeves 30 and a leak-proof and anti-pinch top sleeve 40 at both ends.

[0045] The pressure cap 50 has two through holes 51 spaced apart, and two rotating shafts 20 are respectively inserted into the two through holes 51. The two rotating shafts 20 are fixedly connected by the pressure cap 50. There are two pressure caps 50, which are symmetrically arranged along the center of the rotating shafts 20 and are used to fix the two ends of the two rotating shafts 20.

[0046] Specifically, in this embodiment, the outer diameter of the pressure cap 50 is larger than the outer diameter of the wear-resistant sleeve 30, that is, the outer diameter of the pressure cap 50 is larger than the outer diameter of the anti-leakage and anti-pinch top sleeve 40. When the pressure cap 50 abuts against one side of the anti-leakage and anti-pinch top sleeve 40, it can cover the gap between the anti-leakage and anti-pinch top sleeve 40 and the side wall of the shaft hole, further preventing external impurities from entering and improving the reliability and stability of the internal mixer 1.

[0047] like Figures 1-5 As shown, the internal mixer 1 of this application also includes a fixed base 60, the fixed base 60 has a mounting hole 61, the rotating shaft 20 passes through the mounting hole 61, and one side wall of the fixed base 60 is sandwiched between the outer side wall of the internal mixing chamber 10 and the pressure cover 50.

[0048] The diameter of the mounting hole 61 is larger than that of the rotating shaft 20, which facilitates the insertion of the rotating shaft 20. The rotating shaft 20 is fixedly connected by the pressure cap 50 to achieve overall fixation. At the same time, the pressure cap 50 can also be used to cover the gap between the rotating shaft 20 and the mounting hole 61, further preventing the entry of external impurities and improving the reliability and stability of the internal mixer 1.

[0049] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A mixing mill with anti-leakage and anti-pinch functions, characterized in that, include: The mixing chamber has corresponding shaft holes on its two side walls that are aligned on the same straight line. A rotating shaft is inserted into the shaft holes on both sides. The rotating shaft is provided with a plurality of spiral blades. Both ends of the spiral blades on the rotating shaft are provided with inwardly recessed platforms. The ends of the platforms away from the opposite platforms are spaced apart from the peripheral wall of the rotating shaft. A wear-resistant sleeve is fitted onto the rotating shaft and abuts against the end of the recessed platform, the wear-resistant sleeve covering the gap between the recessed platform and the rotating shaft; A leak-proof and anti-pinch top sleeve is fitted onto the rotating shaft and abuts against the side of the wear-resistant sleeve away from the recessed platform. A pressure cap is provided, with a through hole through which the rotating shaft passes. The pressure cap and the anti-leakage and anti-pinch top sleeve are abutted against each other on the side away from the wear-resistant sleeve to position the wear-resistant sleeve and the anti-leakage and anti-pinch top sleeve.

2. The internal mixer according to claim 1, characterized in that, The recessed platform and the spiral blade are integrally formed.

3. The internal mixer according to claim 1, characterized in that, At least two of the spiral blade edges are spaced apart, and a recess is formed on the opposite side of the spiral blade edges. The diameter of the recess gradually decreases from the opposite side of the spiral blade edges to the opposite side of the spiral blade edges, and the end of the recess is provided with a columnar structure.

4. The internal mixer according to claim 1, characterized in that, The number of wear-resistant sleeves and leak-proof and anti-pinch top sleeves are both two sets, symmetrically arranged along the center of the rotating shaft.

5. The internal mixer according to claim 1, characterized in that, The wear-resistant sleeve is a wear-resistant copper sleeve.

6. The internal mixer according to claim 1, characterized in that, The wear-resistant sleeve and the leak-proof and anti-pinch top sleeve have the same inner and outer diameters, and the outer diameter of the wear-resistant sleeve is the same as the diameter of the shaft hole. When the wear-resistant sleeve and the leak-proof and anti-pinch top sleeve are fitted onto the rotating shaft, the outer side wall of the wear-resistant sleeve and the outer side wall of the leak-proof and anti-pinch top sleeve both abut against the side wall at the shaft hole, so as to realize the sequential nesting of the shaft hole, the wear-resistant sleeve, the leak-proof and anti-pinch top sleeve and the rotating shaft.

7. The internal mixer according to claim 1, characterized in that, The mixing chamber has two sets of corresponding shaft holes on its two side walls, which are on the same straight line. In the shaft holes of the two shafts, each set of shafts has a set of wear-resistant sleeves and anti-leakage and anti-pinch top sleeves at both ends.

8. The internal mixer according to claim 7, characterized in that, The pressure cap has two through holes spaced apart, and two rotating shafts are respectively inserted into the two through holes; wherein, there are two pressure caps, which are symmetrically arranged along the center of the rotating shafts.

9. The internal mixer according to claim 8, characterized in that, The outer diameter of the gland is larger than the outer diameter of the wear-resistant sleeve.

10. The internal mixer according to claim 1, characterized in that, The internal mixer also includes a fixed base with a mounting hole. The rotating shaft passes through the mounting hole, and one side wall of the fixed base is sandwiched between the outer wall of the mixing chamber and the pressure cap.

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