A double-shaft bidirectional spiral stirring assembly and a uniform stirring device applying the same

Abstract

The application relates to the technical field of stirring equipment, and particularly discloses a double-shaft bidirectional spiral stirring assembly and uniform stirring equipment applying the same. The double-shaft bidirectional spiral stirring assembly comprises stirring shafts and stirring blades. The outer wall of the stirring shaft is provided with a first screw section and a second screw section. The first screw section and the second screw section are distributed along the axial direction of the stirring shaft. The spiral directions of the first screw section and the second screw section are opposite. The stirring shafts are provided in two, and the two stirring shafts are arranged in parallel and have opposite directions. The stirring blades are used for stirring raw materials when the stirring shafts rotate. The stirring blades comprise first blades and second blades. The first blades are arranged around the surface of the stirring shaft along the first screw section. The second blades are arranged around the surface of the stirring shaft along the second screw section. The first blades and the second blades are discontinuously arranged in the axial direction. The discontinuous interval of adjacent blades is 30%-50% of the pitch. The application has the effect of improving the problem that the single flow path of the spiral stirring assembly leads to insufficient mixing of raw materials.

Description

Technical Field

[0001] This application relates to the technical field of mixing equipment, and in particular to a biaxial spiral mixing assembly and a material mixing device using the assembly. Background Technology

[0002] As a core piece of equipment for mixing and conveying raw materials in industrial production, the structural design of spiral mixing components directly affects the efficiency of raw material processing and the quality of mixing.

[0003] Traditional spiral mixing components mostly adopt a single-axis, unidirectional continuous spiral blade structure. During the mixing process, the raw materials only flow along a fixed axis, and the flow path is single and orderly. This makes it difficult for the raw materials to form complex convection and shear, and it is easy to have problems such as insufficient local mixing and poor uniformity. Summary of the Invention

[0004] To address the issue of insufficient material mixing caused by the single flow path of the spiral mixing assembly, this application provides a biaxial, bidirectional spiral mixing assembly and a material mixing device using the assembly.

[0005] Firstly, the biaxial, two-way spiral stirring assembly provided in this application adopts the following technical solution:

[0006] A biaxial, bidirectional helical stirring assembly, comprising:

[0007] The stirring shaft has a first spiral segment and a second spiral segment on its outer wall. The first spiral segment and the second spiral segment are both distributed along the axial direction of the stirring shaft. The spiral directions of the first spiral segment and the second spiral segment are opposite. There are two stirring shafts. The two stirring shafts are arranged in parallel and rotate in opposite directions.

[0008] A stirring blade is used to stir raw materials when the stirring shaft rotates. The stirring blade includes a first blade and a second blade. The first blade is wound around the surface of the stirring shaft along the first helical segment, and the second blade is wound around the surface of the stirring shaft along the second helical segment. The first blade and the second blade are intermittently arranged in the axial direction, and the intermittent interval between adjacent blades is 30% to 50% of the pitch.

[0009] By adopting the technical scheme, the first blade and the second blade are arranged on the first screw segment and the second screw segment respectively, so that the raw materials can form a bidirectional flow path when the stirring shaft rotates, the raw materials converge from both ends of the stirring shaft to the middle position of the stirring shaft, or the raw materials disperse from the middle position of the stirring shaft to both ends of the stirring shaft, thereby generating a shearing force and a radial disturbance. Compared with the orderly flow of the traditional screw stirring assembly, the complex flow path formed by the reverse screw segment and the double shaft can make the raw materials form a complex motion state, and the problem of insufficient mixing of the raw materials caused by the single flow path of the screw stirring assembly is improved. The intermittent arrangement of the stirring blades can periodically break the flow of the raw materials, avoid the regular flow of the raw materials in the form of overall displacement, and form a discontinuous pushing path through the interval processing of the stirring blades, so as to promote the decomposition and collision of the raw materials, further mix the raw materials, and further improve the problem of insufficient mixing of the raw materials caused by the single flow path of the screw stirring assembly. The dynamic stirring mode formed by the intermittent interval of the blades and the reverse screw segment can prevent the adhesion and accumulation of slurry raw materials on the surface of the shaft body, and can play a role of preventing adhesion in cooperation with the shearing action of the double shaft.

[0010] Preferably, the pitch of the first screw segment is 45mm-155mm, and the pitch of the second screw segment is 45mm-155mm.

[0011] By adopting the technical scheme, the gradient arrangement of the first screw segment and the second screw segment can make the stirring blades have a gradient, so that the raw materials experience dynamic changes in speed and pressure during movement. When the raw materials move from both ends of the stirring shaft (the pitch is larger) to the middle position, the pushing frequency of the stirring blades increases with the decrease of the pitch, the number of extrusion of the raw materials gradually increases, and the flow speed gradually decreases. At the middle position (the pitch is smaller), the raw materials form a local high-pressure area due to the increase of pushing resistance, and the raw materials in different directions collide and shear at this position. In combination with the radial force generated by the reverse rotation of the double shaft, the problem of insufficient mixing of the raw materials caused by the single flow path of the screw stirring assembly is improved.

[0012] In a second aspect, the application provides a uniform stirring equipment, which adopts the following technical scheme:

[0013] A uniform stirring equipment comprises:

[0014] A stirring cylinder is arranged to form a treatment cavity;

[0015] The double-shaft bidirectional screw stirring assembly described above is inserted into the stirring cylinder, and is used to stir the raw materials in the treatment cavity. The distance between the two stirring shafts is 40%-50% of the length of the inner diameter of the stirring cylinder.

[0016] The kneading assembly is spirally distributed along the stirring shaft and comprises a connecting rod and a kneading piece, the connecting rod is fixedly connected with the stirring shaft, and the kneading piece is fixedly connected with or rotatably connected with one end of the connecting rod away from the stirring shaft, and the kneading assembly is used for kneading the raw materials when the double-shaft bidirectional spiral stirring assembly is working.

[0017] By adopting the technical scheme, the stirring cylinder can form a processing cavity for the double-shaft bidirectional spiral stirring assembly to stir the raw materials, so as to provide a closed stirring environment for the raw materials, the spacing between the two stirring shafts is set to 40% to 50% of the inner diameter of the stirring cylinder, so that the stirring intensity of the raw materials at the middle position can be avoided from being insufficient due to too large spacing, and the risk of collision between the shafts due to too small spacing can be avoided, the kneading piece can rigidly knead (for hard and lumpy raw materials) or rollingly knead (for viscous slurry), and the raw materials between the cylinder wall and the shafts are stirred and kneaded, and the raw materials are re-rolled into the stirring flow field.

[0018] Preferably, the kneading piece is an arc-shaped plate, the kneading piece is fixedly connected with the connecting rod, an inclination angle formed by the extension path of the kneading piece and the axis of the stirring shaft is 15° to 30°, and the kneading piece is a wear-resistant ceramic plate.

[0019] By adopting the technical scheme, the inclination angle enables the arc-shaped plate to produce oblique scraping and forward extrusion on the raw materials when the arc-shaped plate rotates with the shaft, the inclination direction forms an acute angle with the pushing direction of the screw segment, so that the raw materials are guided to be turned along the arc-shaped surface and then pushed by subsequent blades, the inclination gradient of 15° to 30° enables the kneading degree to change with the change of the rotating speed, for example, the higher the rotating speed, the greater the axial component force generated by the inclined surface, and the greater the kneading degree, so that the kneading requirements of raw materials with different viscosities can be met, and the wear-resistant ceramic plate is selected in terms of its high hardness and low friction coefficient, so that the risk of adhesion of the raw materials to the surface of the kneading piece is reduced, and the wear resistance to high-hardness particle raw materials is improved.

[0020] Preferably, the kneading piece is a metal roller, the kneading piece is rotatably connected with the connecting rod, and the kneading piece can rotate relative to the connecting rod to knead the raw materials.

[0021] By adopting the technical scheme, when the stirring shaft drives the kneading piece to rotate, the raw materials between the outer wall of the metal roller and the inner wall of the stirring cylinder generate a radial resistance on the roller, the resistance drives the kneading piece to rotate around the connecting rod, especially when hard lumps of raw materials are encountered, the roller avoids the rigid impact of the hard lumps of raw materials by slipping, and at the same time, the roller rolls and crushes the hard lumps of raw materials, so that the hard lumps of raw materials are broken.

[0022] Preferably, a scraping plate is further included, the scraping plate is fixedly connected with the stirring shaft, the length direction of the scraping plate is perpendicular to the axial direction of the stirring shaft, the scraping plate abuts against the inner wall of the stirring cylinder, the scraping plate is used for scraping the raw material attached to the inner wall of the stirring cylinder, and two scraping plates are arranged on the two ends of the stirring shaft.

[0023] By adopting the above technical scheme, when the stirring shaft rotates, the scraping plate can move, and since the scraping plate abuts against the inner wall of the stirring cylinder, the scraping plate can scrape the raw material attached to the inner wall of the stirring cylinder, and simultaneously stir the raw material.

[0024] Preferably, the cross-sectional width of the two sides of the scraping plate is smaller than the width of the middle part, and the scraping plate is a polytetrafluoroethylene plate.

[0025] By adopting the above technical scheme, the cross-sectional width of the end part of the scraping plate in the rotating direction is smaller than the width of the middle part, so that the contact area between the scraping end of the scraping plate and the raw material is small during the process of scraping the raw material, the obstruction of the raw material to the scraping plate is reduced, and thus the stirring shaft is not subjected to a large burden; the polytetrafluoroethylene plate has a self-lubricating property, so that the raw material is not easily attached to the surface of the scraping plate.

[0026] Preferably, a valve body is further included, the length of the channel of the valve body is 5cm-6cm, the inner wall of the channel of the valve body is provided with a polytetrafluoroethylene coating, the valve body is in communication with the treatment cavity, and the valve body is used for allowing the raw material to flow into the treatment cavity, so as to reduce the adhesion of the raw material on the flow path.

[0027] By adopting the above technical scheme, when the raw material flows through the valve body and enters the treatment cavity, the adhesion or accumulation of the raw material can be reduced, the utilization rate of the raw material is improved, and subsequent cleaning and continuous normal operation of the equipment are facilitated.

[0028] Preferably, the stirring cylinder is formed by connecting two parallel cylinder bodies, the two cylinder bodies are coincided on one side, the wall part of the coincided part of the two cylinder bodies is removed, the cavities of the two cylinder bodies are in communication, and the two stirring shafts of the double-shaft double-direction spiral stirring assembly are arranged in the two cylinder bodies, respectively.

[0029] By adopting the above technical scheme, the stirring blades in each cylinder body push the raw material to the coincided area, so that a countercurrent state of left cylinder right pushing and right cylinder left pushing is formed, and the uniformity of the stirring of the raw material is ensured.

[0030] Preferably, the rotating speed ratio of the two stirring shafts of the double-shaft double-direction spiral stirring assembly is 1:1, so as to realize synchronous stirring of the two stirring shafts and improve the uniformity of the mixing of the raw material.

[0031] By adopting the technical scheme, the two stirring shafts with a speed ratio of 1:1 can realize dynamic balance of stirring of the raw materials, thereby ensuring uniform stirring of the raw materials and improving stability of the process and consistency of the products.

[0032] To sum up, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The first and second blades are arranged on the first and second screw segments, respectively, so that the raw materials can form a bidirectional flow path when the stirring shaft rotates, and the raw materials converge from both ends of the stirring shaft to the middle position of the stirring shaft, or the raw materials disperse from the middle position of the stirring shaft to both ends of the stirring shaft, thereby generating shear force and radial disturbance. Compared with the orderly flow of the traditional screw stirring assembly, the complex flow path formed by the reverse screw segment and the double shaft can make the raw materials form a complex motion state, thereby improving the problem of single flow path of the screw stirring assembly, which leads to insufficient mixing of the raw materials. The intermittent arrangement of the stirring blades can periodically break the flow of the raw materials, thereby avoiding regular flow of the raw materials as a whole. The interval processing of the stirring blades can form a non-continuous pushing path, promote decomposition and collision of the raw materials, and further mix the raw materials. Finally, the problem of single flow path of the screw stirring assembly, which leads to insufficient mixing of the raw materials, is further improved. The dynamic stirring mode formed by the intermittent interval of the blades and the reverse screw segment can prevent the adhesion and accumulation of slurry raw materials on the surface of the shaft body, and can play a role in preventing adhesion in cooperation with the shearing action of the double shaft.

[0034] 2. The stirring cylinder can form a processing cavity for the double-shaft bidirectional screw stirring assembly to stir the raw materials, thereby providing a closed stirring environment for the raw materials. The distance between the two stirring shafts is set to 40%-50% of the inner diameter of the stirring cylinder, which can avoid insufficient stirring intensity of the raw materials at the middle position due to too large distance, and avoid the risk of shaft body collision due to too small distance. The kneading element can rigidly knead (suitable for hard lump raw materials) or roll and knead (suitable for viscous slurry), stir and knead the raw materials between the cylinder wall and the shaft, and re-wind the raw materials into the stirring flow field.

[0035] 3. The cross-sectional width of the end part of the scraper rotating direction is smaller than the width of the middle part, so that the contact area between the scraping end of the scraper and the raw materials is small during the scraping of the raw materials, thereby reducing the resistance of the raw materials to the scraper, thereby avoiding a large burden on the stirring shaft. The polytetrafluoroethylene plate has self-lubricating properties, so that the raw materials are not easily attached to the surface of the scraper plate. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of the double-shaft bidirectional screw stirring assembly in the embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of the stirring shaft in the embodiment of the present application;

[0038] Figure 3 is a structural schematic view of a uniform stirring device in an embodiment of the present application;

[0039] Figure 4 is a structural schematic view of a stirring shaft in another embodiment of the present application;

[0040] Figure 5 is a structural schematic view of an internal structure of a uniform stirring device in an embodiment of the present application;

[0041] Figure 6 is a structural schematic view of a scraping plate in an embodiment of the present application.

[0042] Reference signs: 1, double-shaft bidirectional spiral stirring assembly; 11, stirring shaft; 12, stirring blade; 121, first blade; 122, second blade; 2, stirring cylinder; 3, kneading assembly; 31, connecting rod; 32, kneading piece; 4, scraping plate; 5, valve body; 6, processing cavity. DETAILED DESCRIPTION

[0043] The following will be described in detail below with reference to the accompanying drawings. Figure 1 to the accompanying drawings Figure 6 The present application will be further described in detail.

[0044] Embodiments of the present application disclose a double-shaft bidirectional spiral stirring assembly 1. Referring to Figure 1 and Figure 2 , the double-shaft bidirectional spiral stirring assembly 1 comprises a stirring shaft 11 and a stirring blade 12.

[0045] As shown in Figure 1 and Figure 2 , the outer wall of the stirring shaft 11 is provided with a first spiral section and a second spiral section, the first spiral section and the second spiral section are both distributed along the axial direction of the stirring shaft 11, the spiral directions of the first spiral section and the second spiral section are opposite, the stirring shaft 11 is provided with two, the two stirring shafts 11 are arranged in parallel, and the two stirring shafts 11 are opposite in direction.

[0046] As shown in Figure 1 and Figure 2 , the stirring blade 12 is used to stir raw materials when the stirring shaft 11 rotates, the stirring blade 12 comprises a first blade 121 and a second blade 122, the first blade 121 and the second blade 122 are welded to the outer wall of the stirring shaft 11 through a metal column, the first blade 121 is arranged around the surface of the stirring shaft 11 along the first spiral section, the second blade 122 is arranged around the surface of the stirring shaft 11 along the second spiral section, the first blade 121 and the second blade 122 are discontinuously arranged in the axial direction, and the discontinuous interval of adjacent blades is 30% to 50% of the pitch.

[0047] Specifically, the first blade 121 and the second blade 122 are arranged on the first screw segment and the second screw segment respectively, so that when the stirring shaft 11 rotates, the raw materials can form a bidirectional flow path, and the raw materials converge from both ends of the stirring shaft 11 to the middle position of the stirring shaft 11, or the raw materials disperse from the middle position of the stirring shaft 11 to both ends of the stirring shaft 11, thereby generating shear force and radial disturbance. Compared with the orderly flow of the traditional screw stirring assembly, the complex flow path formed by the application can make the raw materials form a complex motion state, and improve the problem that the flow path of the screw stirring assembly is single and the raw materials are not mixed sufficiently; the intermittent arrangement of the stirring blades 12 can periodically break the flow of the raw materials, avoid the regular flow of the raw materials as a whole, and the interval processing of the stirring blades 12 can form a non-continuous pushing path, promote the decomposition and collision of the raw materials, and further mix the raw materials, thereby further improving the problem that the flow path of the screw stirring assembly is single and the raw materials are not mixed sufficiently; the dynamic stirring mode formed by the intermittent interval of the blades and the reverse screw segments can also prevent the raw materials such as slurry from adhering and accumulating on the surface of the shaft body, and cooperate with the shearing action of the double shafts to prevent adhesion.

[0048] For example, the pitch of the first screw segment is 45mm-155mm, the pitch of the second screw segment is 45mm-155mm, and the pitch of the first screw segment and the pitch of the second screw segment gradually decrease from both ends of the stirring shaft 11 to the middle of the stirring shaft 11, so that the raw materials collide at the middle position of the stirring shaft 11; the gradient arrangement of the first screw segment and the second screw segment can make the stirring blades 12 have a gradient, so that the raw materials experience dynamic changes in speed and pressure during movement. When the raw materials move from both ends of the stirring shaft 11 (the pitch is larger) to the middle position, the pushing frequency of the stirring blades 12 increases with the decrease of the pitch, the number of extrusion of the raw materials gradually increases, and the flow speed gradually decreases. At the middle position (the pitch is smaller), the raw materials form a local high-pressure area due to the increase of pushing resistance, and the raw materials in different directions collide and shear at this position. In combination with the radial force generated by the reverse rotation of the double shafts, the problem that the flow path of the screw stirring assembly is single and the raw materials are not mixed sufficiently is improved.

[0049] The embodiment of the application also discloses a uniform stirring equipment. Referring to Figure 2 and Figure 3 , the uniform stirring equipment comprises a stirring cylinder 2, a kneading assembly 3, a scraping plate 4, a valve body 5 and the double-shaft bidirectional screw stirring assembly 1.

[0050] As Figure 2 and Figure 3As shown, the stirring barrel 2 is formed by connecting two parallel barrels, the two barrels are coincident at one side, the wall part of the coincident part of the two barrels is removed, the cavities of the two barrels are communicated to form the processing cavity 6, the stirring barrel 2 can form the processing cavity 6 for the double-shaft bidirectional spiral stirring assembly to stir the raw materials, thereby providing a closed stirring environment for the raw materials; for example, the stirring barrel 2 includes but is not limited to a 304 stainless steel barrel or a titanium alloy barrel; the stirring blade 12 group in each barrel pushes the raw materials to the coincident area, forming a convection state of left barrel right pushing and right barrel left pushing, ensuring the uniformity of the raw material stirring.

[0051] As shown in Figure 1 and Figure 3 The double-shaft bidirectional spiral stirring assembly 1 is inserted into the stirring barrel 2, the double-shaft bidirectional spiral stirring assembly 1 is used for stirring the raw materials in the processing cavity 6, the distance between the two stirring shafts 11 is 40%-50% of the length of the inner diameter of the stirring barrel 2, and the rotation speed ratio of the two stirring shafts 11 of the double-shaft bidirectional spiral stirring assembly 1 is 1:1, so as to realize synchronous stirring of the two stirring shafts 11 and improve the uniformity of the raw material mixing; in the embodiment of the present application, the two stirring shafts 11 of the double-shaft bidirectional spiral stirring assembly 1 are arranged in the two barrels respectively, the distance between the two stirring shafts 11 is set to be 40%-50% of the inner diameter of the stirring barrel 2, which can avoid insufficient stirring intensity of the raw materials at the middle position caused by too large distance, and avoid the risk of shaft body collision caused by too small distance, and the rotation speed ratio of the two stirring shafts 11 is 1:1, which can realize dynamic balance of the raw material stirring, thereby ensuring uniform stirring of the raw materials and improving the stability of the process and the consistency of the products.

[0052] For example, one end of each of the two stirring shafts 11 is provided with a matching transmission gear, the transmission gears on the two stirring shafts 11 are of the same specification, the transmission gears on the two stirring shafts 11 are engaged, and any transmission gear is driven by any motor, so that the two stirring shafts 11 rotate synchronously.

[0053] Optionally, the two stirring shafts 11 can also rotate synchronously without transmission gears, the two stirring shafts 11 can be driven by a differential gear box or an independently configured independent driving system, the raw materials are rubbed or mixed by the difference in rotation speed, the physical mixing and chemical reaction process are accelerated, and the stirring efficiency of high-viscosity raw materials or raw materials that need to be finely dispersed is improved.

[0054] Optionally, the two stirring shafts 11 can also be driven by a differential gear box or an independently configured independent driving system to perform forward and reverse rotation alternately, so as to realize reverse pushing or mixing of the raw materials by periodically switching the rotation direction.

[0055] It should be noted that the stirring shaft 11 and the stirring barrel 2 are sealed by a sealing method including but not limited to mechanical sealing or magnetic sealing, so as to avoid leakage of the raw materials.

[0056] As shown in Figure 1 and Figure 2 , the kneading assembly 3 is spirally distributed along the stirring shaft 11, including a connecting rod 31 and a kneading piece 32, the connecting rod 31 is fixedly connected with the stirring shaft 11, and the kneading piece 32 is fixedly connected with one end of the connecting rod 31 away from the stirring shaft 11, or the kneading piece 32 is rotatably connected with one end of the connecting rod 31 away from the stirring shaft 11, the kneading assembly 3 is used for kneading the raw materials when the double-shaft double-direction spiral stirring assembly 1 works; the kneading piece 32 can rigidly knead, which is suitable for hard and clumpy raw materials, or the kneading piece 32 can rollingly knead, which is suitable for viscous slurry, and the raw materials between the cylinder wall and the shaft are stirred and kneaded, and the raw materials are re-rolled into the stirring flow field; for example, the connecting rod 31 is a metal rod, and the connecting rod 31 is welded with the stirring shaft 11.

[0057] As shown in Figure 1 and Figure 2 , in the embodiment of the application, the kneading piece 32 is a metal roller, and the kneading piece 32 is rotatably arranged at one end of the connecting rod 31 through a sleeve welded on the connecting rod 31, and the kneading piece 32 can rotate relative to the connecting rod 31 to knead the raw materials; when the stirring shaft 11 drives the kneading piece 32 to rotate, the raw materials between the outer wall of the metal roller and the inner wall of the stirring cylinder 2 will generate a radial resistance to the roller, and the resistance drives the kneading piece 32 to rotate around the connecting rod 31 autonomously, especially when hard clumps of raw materials are encountered, the metal roller avoids the rigid impact of the hard clumps of raw materials by slipping, and at the same time, the hard clumps of raw materials are crushed under the rolling.

[0058] As shown in Figure 4 , in another embodiment of the application, the kneading piece 32 is an arc-shaped plate, the kneading piece 32 is welded with the connecting rod 31, the inclination angle formed by the extension path of the kneading piece 32 and the axis of the stirring shaft 11 is 15°-30°, and the kneading piece 32 is a wear-resistant ceramic plate; the inclination angle makes the arc-shaped plate produce oblique scraping and positive extrusion on the raw materials when the shaft rotates, the inclination direction forms an acute angle with the pushing direction of the screw segment, which can guide the raw materials to be pushed again by the subsequent blades after being turned over along the arc-shaped surface, and the inclination gradient of 15°-30° can make the kneading degree change with the change of the rotating speed, for example, the higher the rotating speed, the greater the axial component force generated by the inclined surface, and the greater the kneading degree generated when the raw materials are contacted, thereby adapting to the kneading needs of raw materials with different viscosities, and the selection of the wear-resistant ceramic plate material utilizes the characteristics of high hardness and low friction coefficient, which reduces the risk of adhesion of the raw materials to the surface of the kneading piece 32 and improves the wear resistance to high-hardness particle raw materials.

[0059] As shown in Figure 5 and Figure 6As shown, the scraper 4 is fixedly connected with the stirring shaft 11, the length direction of the scraper 4 is perpendicular to the axial direction of the stirring shaft 11, the scraper 4 abuts against the inner wall of the stirring cylinder 2, the scraper 4 is used for scraping the raw materials adhered to the inner wall of the stirring cylinder 2, the scraper 4 is provided with two pieces, and the two pieces of scraper 4 are respectively arranged at the two ends of the stirring shaft 11; when the stirring shaft 11 rotates, the scraper 4 can be driven to move, since the scraper 4 abuts against the inner wall of the stirring cylinder 2, the scraper 4 can scrape the raw materials adhered to the inner wall of the stirring cylinder 2, and simultaneously stir the raw materials.

[0060] It should be noted that in the embodiment of the present application, the cross-sectional width of the two sides of the scraper 4 is smaller than the width of the middle part, and the scraper 4 is a polytetrafluoroethylene plate; the cross-sectional width of the end part of the rotating direction of the scraper is smaller than the width of the middle part, so that the contact area between the scraping end of the scraper and the raw materials is small during the process of scraping the raw materials, the obstruction of the raw materials to the scraper is reduced, thereby avoiding a large burden on the stirring shaft 11; the polytetrafluoroethylene plate has a self-lubricating property, so that the raw materials are not easy to adhere to the surface of the scraper 4.

[0061] As shown in Figure 3 and Figure 5 As shown, the valve body 5 is fixedly connected with the stirring cylinder 2, the length of the channel of the valve body 5 is 5cm~6cm, the inner wall of the channel of the valve body 5 is provided with a polytetrafluoroethylene coating, the valve body 5 is communicated with the processing cavity 6, and the valve body 5 is used for allowing the raw materials to flow into the processing cavity 6, so as to reduce the adhesion of the raw materials on the flow path.

[0062] Optionally, the valve body 5 can be provided with two pieces, the two valve bodies 5 are fixedly connected with the stirring cylinder 2, and the two valve bodies 5 are communicated with the processing cavity 6, one of the valve bodies 5 is used for allowing the raw materials to enter the processing cavity 6, and the other valve body 5 is used for allowing the raw materials to flow out of the processing cavity 6, so as to reduce the accumulation and adhesion of the raw materials when entering and exiting, thereby reducing the residual of the raw materials at the inlet and outlet, improving the utilization rate of the raw materials, facilitating the subsequent cleaning of the stirring cylinder 2, and maintaining the normal operation of the uniform stirring device.

[0063] Optionally, a device or structure for preventing the torque of the stirring shaft 11 from exceeding the standard can also be provided, so as to avoid the shaft body being twisted, the bearing being damaged or the reducer gear being broken, prevent the coil from being overheated and damaged due to the excessive locked-rotor current of the motor, reduce the risk of equipment downtime maintenance and avoid production accidents.

[0064] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A twin-shaft, double-direction helical mixing assembly, characterized by, The double-shaft bidirectional helical stirring assembly (1) is inserted into the stirring cylinder (2), and is used for stirring raw materials in the processing cavity (6). The distance between the two stirring shafts (11) is 40%-50% of the length of the inner diameter of the stirring cylinder (2). The stirring shaft (11) is provided with a first screw segment and a second screw segment, both of which are distributed along the axial direction of the stirring shaft (11), and the screw directions of the first screw segment and the second screw segment are opposite. Two stirring shafts (11) are provided in parallel, and the directions of rotation of the two stirring shafts (11) are opposite. The stirring blade (12) is used for stirring raw materials when the stirring shaft (11) rotates. The stirring blade (12) comprises a first blade (121) and a second blade (122). The first blade (121) is arranged on the surface of the stirring shaft (11) along the first screw segment, and the second blade (122) is arranged on the surface of the stirring shaft (11) along the second screw segment. The first blade (121) and the second blade (122) are discontinuously arranged in the axial direction, and the discontinuous interval of adjacent blades is 30%-50% of the pitch. The pitch of the first screw segment is 45mm-155mm, and the pitch of the second screw segment is 45mm-155mm. The pitch of the first screw segment and the pitch of the second screw segment gradually decrease from both ends of the stirring shaft (11) to the middle part of the stirring shaft (11), so that the raw materials collide at the middle part of the stirring shaft (11).

2. A uniform agitation apparatus, characterized by, The double-shaft bidirectional helical stirring assembly (1) is inserted into the stirring cylinder (2), and is used for stirring raw materials in the processing cavity (6). The distance between the two stirring shafts (11) is 40%-50% of the length of the inner diameter of the stirring cylinder (2). The kneading assembly (3) is helically distributed along the stirring shaft (11) and comprises a connecting rod (31) and a kneading piece (32). The connecting rod (31) is fixedly connected with the stirring shaft (11), and the kneading piece (32) is fixedly connected with one end of the connecting rod (31) away from the stirring shaft (11) or rotatably connected with one end of the connecting rod (31) away from the stirring shaft (11). The kneading assembly (3) is used for kneading raw materials when the double-shaft bidirectional helical stirring assembly (1) works. ； The kneading piece (32) is an arc-shaped plate, the kneading piece (32) is fixedly connected with the connecting rod (31), the extension path of the kneading piece (32) and the axis of the stirring shaft (11) form an inclination angle of 15°-30°, and the kneading piece (32) is a wear-resistant ceramic plate. The kneading piece (32) is a metal roller, the kneading piece (32) is rotatably connected with the connecting rod (31), and the kneading piece (32) can rotate relative to the connecting rod (31) to knead raw materials.

3. The equipment according to claim 2, characterized in that: ​ 4. The equipment for homogenizing a material according to claim 2, characterized in that: ​ 5. The equipment for homogenizing a material according to claim 2, characterized in that: Further comprising a scraper (4) fixedly connected with the stirring shaft (11), the length direction of the scraper (4) is perpendicular to the axial direction of the stirring shaft (11), the scraper (4) abuts against the inner wall of the stirring drum (2), the scraper (4) is used for scraping the raw materials adhered to the inner wall of the stirring drum (2), and two scrapers (4) are arranged.

6. The equipment according to claim 5, characterized in that: The cross-sectional width of the two sides of the scraper (4) is smaller than the width of the middle part, and the scraper (4) is a polytetrafluoroethylene plate.

7. The equipment for homogenizing a material according to claim 2, characterized in that: Further comprising a valve body (5) fixedly connected with the stirring drum (2), the channel length of the valve body (5) is 5cm-6cm, the inner wall of the channel of the valve body (5) is provided with a polytetrafluoroethylene coating, the valve body (5) communicates with the treatment cavity (6), and the valve body (5) is used for allowing the raw materials to flow into the treatment cavity (6), so as to reduce the adhesion of the raw materials on the flow path.

8. The equipment for homogenizing a material according to claim 2, characterized in that: The stirring drum (2) is formed by connecting two parallel barrels, the adjacent sides of the two barrels are coincident, the wall part of the coincident part of the two barrels is removed, the cavities of the two barrels are communicated, and the two stirring shafts (11) of the double-shaft double-direction spiral stirring assembly (1) are arranged in the two barrels respectively.

9. The equipment for homogenizing a material according to claim 2, characterized in that: The rotation speed ratio of the two stirring shafts (11) of the double-shaft double-direction spiral stirring assembly (1) is 1:1, so that the two stirring shafts (11) are synchronously stirred, and the uniformity of the raw material mixing is improved.

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