A uniform mixing device for producing a spherical silicon heat preservation tube

Abstract

The application provides a uniform mixing device for production of a spherical silicon heat preservation tube, and belongs to the technical field of mixing devices.The device comprises a base and a driving mechanism.The driving mechanism is arranged on the base, and a mixing assembly and a premixing assembly are arranged on one side of the driving mechanism.The premixing assembly comprises a first hopper, a second hopper and a premixing cylinder.The first hopper is used for feeding an adhesive, and the second hopper is used for feeding spherical silicon.The first hopper is arranged on the top of the premixing cylinder, and the second hopper is arranged on the side of the premixing cylinder.The discharge port of the second hopper is arranged along the tangent direction of the premixing cylinder.A distribution piece is arranged in the premixing cylinder, and the distribution piece is used for uniformly filling the spherical silicon into the adhesive.The mixing assembly comprises a mixing cylinder, a rotating screw and multiple sets of annular opening septums.The mixing cylinder and the rotating screw are coaxial and rotate in opposite directions, and the annular opening septums are fixed on the inner wall of the mixing cylinder in the axial direction.The mixing cylinder is communicated with the premixing cylinder.The end of the mixing cylinder, which is away from the driving mechanism, is provided with a forming mechanism.The device can realize premixing and uniform mixing of the spherical silicon and the adhesive.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and more specifically, to a uniform mixing device for the production of spherical silicon insulation pipes. Background Technology

[0002] In the field of thermal insulation pipe production and processing, in order to ensure the thermal insulation performance and structural strength of spherical silica thermal insulation pipe, the spherical silica filler and adhesive need to be fully and evenly mixed during the production process, and then the finished pipe body is obtained through the molding process. At this time, a special mixing device is required to mix the spherical silica and adhesive, which facilitates subsequent extrusion molding and finished product processing.

[0003] When mixing spherical silica, traditional mixing devices often cause the silica to agglomerate into clumps due to the spherical, lightweight filler material. This prevents the silica from fully contacting the adhesive, resulting in uneven mixing with localized areas of dense silica and localized areas of excessive adhesive. Furthermore, the rigid stirring components of traditional mixing devices can cause the silica to be squeezed and collided, leading to breakage, damage to its spherical structure, and a reduction in its thermal insulation performance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a uniform mixing device for the production of spherical silicon insulation pipes, thereby solving the technical problems in the prior art where, when mixing spherical silicon with adhesives, uneven agglomeration of spherical silicon and breakage of spherical silicon caused by rigid stirring are prone to occur.

[0005] The purpose and effectiveness of the uniform mixing device for the production of spherical silicon heat-insulating pipes of the present invention are achieved by the following specific technical means: This invention provides a uniform mixing device for the production of spherical silicon insulation pipes: Includes the base and drive mechanism; The drive mechanism is mounted on the base, and a mixing component and a premixing component are provided on one side of the drive mechanism; The premixing component includes a first hopper, a second hopper, and a premixing cylinder. The first hopper is used to dispense adhesive, and the second hopper is used to dispense spherical silica. The first hopper is located at the top of the premixing cylinder, the second hopper is located on the side of the premixing cylinder, and the outlet of the second hopper is arranged along the tangential direction of the premixing cylinder; The premixing cylinder is equipped with a dispensing component, which is used to uniformly fill the silica gel into the adhesive. The mixing assembly includes a mixing cylinder, a rotating screw, and multiple sets of annular perforated partitions. The mixing cylinder is coaxial with the rotating screw and rotates in opposite directions. The annular perforated partitions are fixed axially at intervals on the inner wall of the mixing cylinder. The mixing cylinder is connected to the premixing cylinder; A forming mechanism is provided at the end of the mixing cylinder away from the driving mechanism.

[0006] In a preferred embodiment, the premixing cylinder is fixedly mounted on the base and is in a static state; The premixing cylinder is provided with a feed ring at one end near the mixing cylinder. The feed ring is mounted on the base and is connected to the mixing cylinder through a rotary seal. The driving mechanism is connected to the mixing cylinder and the rotating screw respectively, and is used to drive the mixing cylinder and the rotating screw to rotate coaxially and in opposite directions. The rotating screw is used to extrude and convey the material in the mixing cylinder.

[0007] As a preferred embodiment, a gear box is provided on one side of the feed ring, and a driven shaft and a gear ring are provided inside the gear box. A first drive gear and a second drive gear are provided on the driven shaft. The mixing cylinder is equipped with a drive rod, one end of which is equipped with a third drive gear. The rotating screw is sleeved on the drive rod, and one end of which is equipped with a fourth drive gear. The drive rod is connected to the drive mechanism, the third drive gear is connected to the first drive gear through the gear ring, and the second drive gear is connected to the fourth drive gear.

[0008] In a preferred embodiment, the premixing cylinder includes a main cylinder and a secondary cylinder, the main cylinder being disposed at the feed inlet of the feed ring, and the secondary cylinder being connected to the main cylinder via an inclined tube; The material distribution component includes a support rod, which passes through the secondary cylinder. The support rod is provided with a discharge plate, a guide plate, a control plate and a limiting plate from bottom to top. An adhesive storage cavity is formed between the top of the limiting plate and the inner wall of the sub-cylinder, and a spherical silicon storage cavity is formed between the top of the discharge plate, the bottom of the control plate, and the inner wall of the sub-cylinder. The discharge plate and the control plate are both fixedly connected to the auxiliary cylinder, and the guide plate and the limiting plate are both rotatably connected to the support rod. The bottom of the auxiliary cylinder is equipped with a drive motor, which is connected to the support rod in a transmission manner.

[0009] As a preferred embodiment, the discharge plate is provided with a discharge port, which is fan-shaped; The guide plate is a cross-shaped plate with a central bushing and extending symmetrically in four directions; When the guide plate rotates with the support rod, its four sets of arms push the silicon balls in the silicon ball storage chamber to the discharge port, so that the silicon balls fall evenly into the main cylinder. The limiting plate has a limited flow hole to control the flow rate of the adhesive. The material control plate has a flow channel for guiding the adhesive.

[0010] In a preferred embodiment, the flow channel is connected to the flow-limiting hole, and the adhesive flows out through the flow-limiting hole and the flow channel and coats the falling silicon sphere surface; The spherical silicon storage cavity is sequentially configured along the circumference as a storage section, a gradual transition section, and a flat circulation section. The storage section forms an annular cavity for containing spherical silicon. The cavity height of the gradual transition section gradually decreases from the material storage section toward the discharge port of the discharge plate; The flat annular flow section forms an annular channel with equal cavity height; The first hopper is connected to the adhesive storage chamber; The second hopper is connected to the spherical silicon storage cavity.

[0011] As a preferred embodiment, the rotating screw is configured as a front mixing section and a rear dispersing section along the material conveying direction; The spiral blades of the rotating screw are made of polypropylene; The spiral blades of the front mixing section are provided with an array of through mixing holes. The outer edge of the spiral blades in the rear dispersion section is formed with circumferentially spaced flexible comb-like teeth.

[0012] As a preferred embodiment, multiple sets of the annular perforated partitions are arranged at equal intervals along the material conveying direction and are respectively positioned at the front mixing section and the rear dispersing section of the rotating screw; Among them, the annular perforated partition located at the front mixing section is provided with an array of material passage holes. The diameter of the array of material passage holes is larger than the diameter of the mixing holes, and the number of the array of material passage holes is greater than the number of the mixing holes. The annular perforated partition located at the rear dispersion section has an annularly distributed elongated material passage groove. The extension direction of the elongated material passage groove corresponds to the distribution direction of the flexible comb teeth, and the width of the elongated material passage groove is greater than the thickness of the flexible comb teeth.

[0013] In a preferred embodiment, an outer cylinder is fixedly mounted on the base, and the mixing cylinder is rotatably fitted inside the outer cylinder; The mixing cylinder is divided into a normal temperature section and a heating section along the material conveying direction, and the inner diameter of the heating section is smaller than the inner diameter of the normal temperature section. The inner wall of the heating section is provided with an annular mounting groove, and multiple arc-shaped heating elements are evenly distributed along the circumference in the annular mounting groove, with a heat insulation gap between two adjacent arc-shaped heating elements.

[0014] In a preferred embodiment, the molding mechanism includes a molding die head, a shaping sleeve, and an extrusion port; The forming die head is connected to the discharge end of the mixing cylinder, the shaping sleeve is coaxially disposed on the outlet side of the forming die head, and the extrusion port is formed at the end of the shaping sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the coordinated arrangement of the premixing component and the dispensing component, enables the device to achieve premixing and homogenization of spherical silica and adhesive, improving the adaptability of the device to spherical silica mixing operations. The device can uniformly feed materials through the guide plate of the dispensing component and guide the adhesive to coat the spherical silica through the control plate, thereby preventing the spherical silica from agglomerating into lumps and achieving full contact and mixing of spherical silica and adhesive. This solves the problem of uneven material mixing from the source and improves the device's ability to control the uniformity of spherical silica and adhesive mixing operations.

[0016] 2. When using this device, the structure of a flexible comb-like toothed spiral blade made of polypropylene can replace the traditional hard agitator. This prevents the device from subjecting the spherical silicon to hard compression and collision during the mixing and dispersing of materials, thus preventing the silicon from breaking and improving the device's protection of the spherical silicon structure. Then, through the coaxial counter-rotation of the rotating screw and the mixing cylinder, combined with the staged mixing of the annular perforated partition, the device can further improve the dispersion effect while gently mixing the materials. This ensures that the thermal insulation performance of the spherical silicon is not damaged, and further optimizes the uniformity of material mixing, thereby improving the thermal insulation performance and structural strength of the spherical silicon insulation pipe produced by this device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the invention; Figure 2 This is a schematic diagram of the internal structure of the gearbox of the invention; Figure 3 This is a schematic diagram of the premixing cylinder of the invention; Figure 4 This is a schematic diagram of the internal structure of the premixing cylinder of the invention; Figure 5 This is a schematic diagram of the material storage section and the gradual transition section of the invention. Figure 6 This is a schematic diagram of the flat-ring flow section of the invention; Figure 7 This is a schematic diagram of the disassembled structure of the material-separating component of the invention; Figure 8 This is a schematic diagram of the structure of the outer cylinder and the mixing cylinder of the invention; Figure 9 This is a schematic diagram of the arc-shaped heating element of the invention; Figure 10 This is a schematic diagram of the structure of the annular perforated partition and the spiral blade of the invention. Figure 11 This is a schematic diagram of the material control plate of the invention.

[0018] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows: 101. Base; 102. Drive mechanism; 103. Gear box; 104. Driven shaft; 105. Gear ring; 106. First drive gear; 107. Second drive gear; 108. Drive rod; 109. Third drive gear; 111. Fourth drive gear; 112. Drive motor; 201. First hopper; 202. Second hopper; 203. Main cylinder; 204. Auxiliary cylinder; 205. Support rod; 206. Discharge plate; 207. 208. Material guide plate; 209. Material control plate; 211. Feeding ring; 301. Mixing cylinder; 302. Rotating screw; 303. Spiral blade; 304. Annular perforated partition; 305. Outer cylinder; 306. Arc-shaped heating element; 401. Forming die head; 402. Shaping sleeve; 403. Extrusion port; 501. Material storage section; 502. Gradual transition section; 503. Flat ring flow section; 504. Room temperature section; 505. Heating section. Detailed Implementation

[0019] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0020] Example:

[0021] like Figures 1 to 11 As shown, the present invention provides a uniform mixing device for the production of spherical silicon insulation pipes: Includes base 101 and drive mechanism 102; The drive mechanism 102 is mounted on the base 101, and a mixing component and a premixing component are provided on one side of the drive mechanism 102; The premixing component includes a first hopper 201, a second hopper 202, and a premixing cylinder. The first hopper 201 is used to dispense adhesive, and the second hopper 202 is used to dispense spherical silica. The first hopper 201 is located at the top of the premixing cylinder, the second hopper 202 is located on the side of the premixing cylinder, and the outlet of the second hopper 202 is set along the tangential direction of the premixing cylinder. The premixing cylinder is equipped with a dispensing component, which is used to uniformly fill the silica gel into the adhesive; The mixing assembly includes a mixing cylinder 301, a rotating screw 302, and multiple sets of annular perforated partitions 304. The mixing cylinder 301 is coaxial with the rotating screw 302 and rotates in opposite directions. The annular perforated partitions 304 are fixed axially at intervals on the inner wall of the mixing cylinder 301. Mixing cylinder 301 is connected to the premixing cylinder; A forming mechanism is provided at the end of the mixing cylinder 301 away from the drive mechanism 102.

[0022] It should be noted that this device is suitable for industrial production environments that integrate the mixing and extrusion molding of plastic and rubber polymer materials. Specifically, it is used in the large-scale production line of spherical silica insulation pipes. It can complete the mixing of spherical silica filler with special plastic and rubber adhesives for insulation pipes under medium-low temperature and normal pressure workshop conditions, and directly connect to the pipe extrusion molding process. It is adapted to the requirements of continuous and automated production, and is compatible with the processing needs of different specifications of spherical silica filler and various thermoplastic and thermosetting adhesives. It can be arranged independently or integrated into the complete set of insulation pipe molding production equipment.

[0023] Specifically, during operation, the special adhesive for insulation pipes is first added to the first hopper 201, and the spherical silica filler is added to the second hopper 202. The adhesive flows by gravity into the premixing cylinder, while the spherical silica filler enters the cylinder through the tangential outlet. The material distributor evenly disperses the spherical silica filler into the adhesive, completing the initial premixing of the two. The premixed adhesive-spherical silica mixture then enters the mixing cylinder 301. The drive mechanism 102 drives the mixing cylinder 301 and the rotating screw 302 to rotate in opposite directions on the same axis. The material is mixed with the rotating screw 302. Under the spiral pushing action of 02 and the multi-layer barrier effect of the annular perforated partition 304, turbulent mixing is formed in the mixing cylinder 301, realizing the full homogenization of spherical silicon and adhesive. The homogenized mixture is directly conveyed to the forming mechanism at the end of the mixing cylinder 301. After being shaped by the forming die head 401 and sized by the shaping sleeve 402, it is extruded from the extrusion port 403 into a spherical silicon insulation pipe blank. The entire process realizes the integrated continuous operation of mixing spherical silicon and adhesive and forming insulation pipe, without the need for intermediate material transfer, thus improving production efficiency.

[0024] The premixing cylinder is fixedly installed on the base 101 and is in a static state; A feed ring 211 is provided at one end of the premixing cylinder near the mixing cylinder 301. The feed ring 211 is mounted on the base 101 and is connected to the mixing cylinder 301 through a rotary seal. The drive mechanism 102 is connected to the mixing cylinder 301 and the rotating screw 302 respectively, and is used to drive the mixing cylinder 301 and the rotating screw 302 to rotate coaxially and in opposite directions. The rotating screw 302 is used to extrude and convey the material in the mixing cylinder 301.

[0025] Specifically, the drive mechanism 102 outputs power to the mixing cylinder 301 and the rotating screw 302 respectively, causing them to rotate in opposite directions on the same axis. The premixing cylinder is fixed to the base 101 and remains stationary throughout. Its end near the mixing cylinder 301 is connected to the mixing cylinder 301 through the feed ring 211. After the premixed material is output from the premixing cylinder, it smoothly enters the mixing cylinder 301 through the feed ring 211. During the reverse rotation, the rotating screw 302 forms a spiral extrusion and push on the material, so that the material is gradually conveyed along the axial direction of the mixing cylinder 301. At the same time, in conjunction with the reverse rotation of the mixing cylinder 301, the material is fully agitated and mixed in the cylinder, so that the mixing and conveying are carried out simultaneously.

[0026] It should be explained that the rotary seal can be a TC-type skeleton oil seal, which is set at the connection and mating position between the feed ring 211 and the mixing cylinder 301. Since the premixing cylinder and the feed ring 211 are both fixed static structures, while the mixing cylinder 301 is in a rotating state, there is a relative rotation between the two. The rotary seal can reliably seal the mating gap between the feed ring 211 and the mixing cylinder 301 while realizing dynamic communication between them. This prevents the material in the mixing cylinder 301 from leaking from the dynamic and static mating parts during the rotational conveying process. At the same time, it reduces the frictional loss caused by relative rotation, ensuring the sealing performance of the material conveying channel and the stability of the structural operation.

[0027] A gear box 103 is provided on one side of the feed ring 211. The gear box 103 is provided with a driven shaft 104 and a gear ring 105. A first drive gear 106 and a second drive gear 107 are provided on the driven shaft 104. The mixing cylinder 301 is provided with a drive rod 108, one end of which is provided with a third drive gear 109, and a rotating screw 302 is sleeved on the drive rod 108, one end of which is provided with a fourth drive gear 111. The drive rod 108 is connected to the drive mechanism 102, the third drive gear 109 is connected to the first drive gear 106 through the gear ring 105, and the second drive gear 107 is connected to the fourth drive gear 111.

[0028] Specifically, the drive mechanism 102 drives the drive rod 108 to rotate, and the drive rod 108 synchronously drives the third drive gear 109 and the fourth drive gear 111 on the rotating screw 302 to rotate. The third drive gear 109 is transmitted to the first drive gear 106 through the gear ring 105, and then to the second drive gear 107 through the driven shaft 104. The second drive gear 107 meshes with the fourth drive gear 111. By matching the number of gear teeth and the transmission ratio, the mixing cylinder 301 and the rotating screw 302 are made to rotate in opposite directions, thereby forming a coaxial reverse rotation transmission structure, realizing that the two make relative reverse motion around the same axis.

[0029] The premixing cylinder includes a main cylinder 203 and a secondary cylinder 204. The main cylinder 203 is located at the feed inlet of the feed ring 211, and the secondary cylinder 204 is connected to the main cylinder 203 through an inclined tube. The material distribution component includes a support rod 205, which is inserted into the secondary cylinder 204. The support rod 205 is provided with a discharge plate 206, a guide plate 207, a control plate 208 and a limiting plate 209 from bottom to top. An adhesive storage cavity is formed between the top of the limited plate 209 and the inner wall of the auxiliary cylinder 204, and a spherical silicon storage cavity is formed between the top of the discharge plate 206, the bottom of the control plate 208, and the inner wall of the auxiliary cylinder 204. The discharge plate 206 and the control plate 208 are both fixedly connected to the auxiliary cylinder 204, and the guide plate 207 and the limiting plate 209 are both rotatably connected to the support rod 205. The bottom of the auxiliary cylinder 204 is equipped with a drive motor 112, which is connected to the support rod 205 for transmission.

[0030] Specifically, the drive motor 112 drives the support rod 205 to rotate continuously, and the support rod 205 synchronously drives the guide plate 207 and the limiting plate 209 to rotate, while the discharge plate 206 and the control plate 208 remain fixed to the auxiliary cylinder 204. The adhesive in the adhesive storage chamber falls quantitatively through the flow-limiting hole on the limiting plate 209, and the spherical silicon in the spherical silicon storage chamber is evenly fed out under the action of the guide plate 207. The two are initially coated and premixed in the area between the main cylinder 203 and the auxiliary cylinder 204, and then flow into the main cylinder 203 through the inclined tube, and finally enter the mixing cylinder 301 through the feed ring 211, so as to realize the continuous, quantitative and uniform premixing of spherical silicon and adhesive.

[0031] It should be noted that the second hopper 202 is a dedicated feeding structure for quantitatively adding spherical silica filler. The weight and flow rate of the added spherical silica filler are controlled according to a preset ratio. Continuous and constant flow rate quantitative feeding is achieved through an externally matched quantitative feeder or screw quantitative feeder, ensuring a stable ratio of spherical silica to adhesive and avoiding uneven feeding that could affect the mixing quality and the performance of the finished insulation pipe. The discharge plate 206 has a discharge port, which is fan-shaped. The guide plate 207 is a cross-shaped plate with a central bushing and extending symmetrically in four directions; When the guide plate 207 rotates with the support rod 205, its four sets of arms push the spherical silicon in the spherical silicon storage cavity to the discharge port, so that the spherical silicon falls evenly into the main cylinder 203; Limited flow holes are provided on the limited plate 209 to control the flow rate of the adhesive; The material control plate 208 has a flow channel for guiding the adhesive.

[0032] The specific implementation method is as follows: The discharge plate 206 is horizontally fixed to the lower part of the inner wall of the auxiliary cylinder 204. The discharge port on it is arranged around the circumference of the auxiliary cylinder 204. The fan-shaped opening faces the inclined tube interface on one side of the main cylinder 203 to ensure that the spherical silicon can smoothly enter the inclined tube and flow into the main cylinder 203 after being discharged through the discharge port. The guide plate 207 adopts a cross-arm-shaped plate with a central bushing. The bushing is sleeved and fixed on the support rod 205. The four sets of arms are slightly in contact with the inner wall of the auxiliary cylinder 204 and the top of the discharge plate 206, which does not affect the rotation and prevents the spherical silicon from leaking out from the gap between the arm and the cylinder wall.

[0033] When the drive motor 112 drives the support rod 205 to rotate, the guide plate 207 rotates synchronously with the support rod 205. Its four arms move the spherical silicon at a uniform speed along the circumference of the spherical silicon storage cavity, gradually pushing the spherical silicon stored in the spherical silicon storage cavity to the discharge port. Since the opening size of the discharge port is fixed and the rotation speed of the guide plate 207 is uniform, the spherical silicon can fall from the discharge port at a stable and uniform flow rate and enter the main cylinder 203 below.

[0034] The limiting plate 209 is horizontally mounted and fixed on the support rod 205, rotating synchronously with the support rod 205. The flow-limiting holes on the plate are evenly distributed circumferentially, with the hole diameter preset according to the required ratio of adhesive to silica balls. The flow rate of the adhesive is controlled by the number and diameter of the flow-limiting holes to prevent excessive or insufficient adhesive delivery. The control plate 208 is horizontally fixed on the inner wall of the auxiliary cylinder 204, located between the limiting plate 209 and the guide plate 207. The guide channel on the plate is inclined, with one end aligned with the flow-limiting hole of the limiting plate 209 and the other end facing directly above the outlet. This allows the adhesive falling through the flow-limiting holes to be guided through the guide channel onto the path of the falling silica balls, ensuring that each falling silica ball is evenly coated with adhesive, achieving initial uniform mixing of the silica balls and adhesive.

[0035] like Figures 3 to 7 As shown, the flow channel is connected to the flow-limiting hole, and the adhesive flows out through the flow-limiting hole and the flow channel and coats the surface of the falling spherical silicon. The spherical silicon storage cavity is sequentially configured along the circumference as a storage section 501, a gradual transition section 502, and a flat circulation section 503; The storage section 501 forms an annular cavity for accommodating spherical silicon. The height of the cavity in the gradual transition section 502 gradually decreases from the material storage section 501 toward the discharge port of the discharge plate 206; The flat annular flow section 503 forms an equal-cavity, high-height annular channel. The first hopper 201 is connected to the adhesive storage chamber; The second hopper 202 is connected to the spherical silicon storage chamber.

[0036] Specifically, the flow-limiting holes on the limiting plate 209 and the flow-guiding channels on the control plate 208 are aligned and connected to each other to form a continuous adhesive flow path. After the adhesive flows out of the flow-limiting holes of the limiting plate 209, it directly enters the flow-guiding channels of the control plate 208, realizing the seamless connection between the flow-limiting holes and the flow-guiding channels, and ensuring that the adhesive can be guided to the discharge port area.

[0037] The spherical silicon storage chamber is functionally divided into three continuous areas: a storage section 501, a gradual transition section 502, and a flat-ring flow section 503. The storage section 501 is an annular cavity used to store sufficient spherical silicon to ensure continuous supply. The height of the gradual transition section 502 gradually decreases from the storage section 501 towards the outlet, guiding the spherical silicon to move orderly towards the outlet and preventing accumulation. The flat-ring flow section 503 maintains a consistent height, providing space for the smooth transport of spherical silicon and ensuring it flows evenly towards the outlet.

[0038] The first hopper 201 is directly connected to the adhesive storage chamber. After the adhesive is injected into the first hopper 201, it is temporarily stored in the adhesive storage chamber and then enters the guide channel through the flow-limiting hole of the limiting plate 209. The second hopper 202 is connected to the spherical silicon storage chamber. After the spherical silicon is fed into the second hopper 202, it directly enters the spherical silicon storage chamber. It is first temporarily stored in the storage section 501 and then gradually transported to the flat ring flow section 503 through the gradual transition section 502. Finally, it enters the main cylinder 203 through the discharge port.

[0039] Throughout the process, the guide channel is always aligned directly above the discharge port. After the adhesive flows out through the guide channel, it lands precisely on the surface of the spherical silicon sent out from the discharge port, achieving contact between the adhesive and the spherical silicon. At the same time, the equal cavity height design of the flat ring flow section 503 ensures that the spherical silicon is subjected to uniform force during the conveying process, avoiding agglomeration, laying the foundation for thorough mixing with the adhesive in the subsequent process, and making the mixing of the spherical silicon and the adhesive more uniform.

[0040] like Figures 3 to 10 As shown, the rotating screw 302 is sequentially configured as a front mixing section and a rear dispersing section along the material conveying direction; The spiral blades 303 of the rotating screw 302 are made of polypropylene. The spiral blades 303 of the front mixing section are provided with an array of through mixing holes; The outer edge of the spiral blade 303 in the rear dispersion section is formed with circumferentially spaced flexible comb-like teeth.

[0041] Specifically, the rotating screw 302 is divided into a front mixing section and a rear dispersion section along the material conveying direction. The two sections are integrated and connected to achieve material mixing and conveying. The spiral blades 303 of the front mixing section are made of polypropylene, which is lightweight, wear-resistant, and corrosion-resistant. It is suitable for mixing silica spheres and adhesives, is not easily corroded by adhesives, and will not cause hard compression damage to the silica spheres. At the same time, the blades are uniformly distributed with an array of through mixing holes. When the material flows through this section, it will form a turbulent fluid movement through the mixing holes, breaking the material agglomeration and allowing the silica spheres and adhesives to initially penetrate and mix, achieving the first step of uniform dispersion.

[0042] The spiral blades 303 in the subsequent dispersion section are also made of polypropylene. Their outer edges are integrally molded with circumferentially spaced flexible comb-like teeth. These comb-like teeth are made of flexible material and will not cause hard compression to the spherical silicon. They can further disperse the incompletely dispersed spherical silicon particles and prevent them from agglomerating. They can also further refine and disperse the initially mixed material through the rotation of the comb-like teeth, ensuring that each spherical silicon particle can be evenly coated with adhesive.

[0043] The two sections of the rotating screw 302 work together. The front mixing section is responsible for the initial dispersion and conveying of the material, while the rear dispersion section is responsible for the deep dispersion and mixing of the material. The polypropylene blades ensure structural strength and avoid the squeezing damage to the spherical silicon caused by traditional metal blades. The synergistic effect of the flexible comb-shaped teeth and the mixing holes allows the material to continuously undergo a mixing reaction during the conveying process, ultimately achieving uniform dispersion of the material to meet the needs of subsequent molding processes. This ensures that the mixed material can directly enter the molding stage without additional processing.

[0044] Multiple sets of annular perforated baffles 304 are arranged at equal intervals along the material conveying direction and are respectively set at the front mixing section and the rear dispersing section of the rotating screw 302; Among them, the annular perforated partition 304 located in the front mixing section is provided with an array of material passage holes. The diameter of the array of material passage holes is larger than the diameter of the mixing holes, and the number of array of material passage holes is greater than the number of mixing holes. The annular perforated partition 304 located in the rear dispersion section has an annularly distributed elongated material passage groove. The extension direction of the elongated material passage groove corresponds to the distribution direction of the flexible comb teeth, and the width of the elongated material passage groove is greater than the thickness of the flexible comb teeth.

[0045] Specifically, multiple sets of annular perforated baffles 304 are fixed at equal intervals along the material conveying direction on the inner wall of the mixing cylinder 301, and are respectively arranged in the front mixing section and the rear dispersing section of the rotating screw 302, forming a graded mixing cooperation with the screw segment structure.

[0046] In the front mixing section, an array of material passage holes are opened on the annular perforated partition 304. The diameter of the holes is larger than that of the mixing holes on the spiral blade 303, and the number of holes is also greater. When the material passes through the material passage holes under the push of the rotating screw 302, stronger turbulence and shearing effect will be generated. This, together with the mixing holes of the blade, achieves secondary mixing, further breaking up the spherical silicon agglomerates, so that the adhesive and spherical silicon can quickly and fully penetrate, completing the primary homogenization treatment.

[0047] In the subsequent dispersion section, an annular perforated partition 304 has elongated material passage grooves evenly distributed circumferentially. The extension direction of the grooves corresponds to the distribution direction of the flexible comb-like teeth on the outer edge of the spiral blade 303, and the width of the grooves is greater than the thickness of the flexible comb-like teeth, so that the comb-like teeth can pass freely through the material passage grooves without interference. When the material passes through, the flexible comb-like teeth and the elongated material passage grooves form a combing and scraping action to comb and disperse the material, completely breaking up any remaining small agglomerates, while ensuring that the material passes through smoothly, achieving the final uniform dispersion and providing homogeneous material for subsequent molding.

[0048] An outer cylinder 305 is fixedly provided on the base 101, and the mixing cylinder 301 is rotatably sleeved inside the outer cylinder 305; The mixing drum 301 is divided into a normal temperature section 504 and a heating section 505 along the material conveying direction. The inner diameter of the heating section 505 is smaller than the inner diameter of the normal temperature section 504. The inner wall of the heating section 505 is provided with an annular mounting groove, and multiple arc-shaped heating elements 306 are evenly distributed along the circumference in the annular mounting groove. A heat insulation gap is left between two adjacent arc-shaped heating elements 306.

[0049] Specifically, the outer cylinder 305 fixedly installed on the base 101 serves as a fixed support structure for the device. Its inner wall is in clearance fit with the outer wall of the mixing cylinder 301, allowing the mixing cylinder 301 to rotate stably around the outer cylinder 305. This not only enables the mixing cylinder 301 to rotate, but also limits and protects the mixing cylinder 301 through the outer cylinder 305, preventing the mixing cylinder 301 from shifting or shaking during high-speed rotation, thus ensuring the overall structure operates stably.

[0050] The mixing drum 301 is divided into a normal temperature section 504 and a heating section 505 along the material conveying direction. The two sections are seamlessly connected to adapt to different mixing needs: the normal temperature section 504 is mainly used for the initial mixing and conveying of materials to avoid the adhesive from curing prematurely or the spherical silica properties being damaged due to excessively high temperature; the inner diameter of the heating section 505 is smaller than that of the normal temperature section 504, which can reduce the material flow space and allow the material to have more sufficient contact with the inner wall of the mixing drum 301 and the rotating screw 302 during the conveying process, thereby improving the mixing effect.

[0051] The inner wall of the heating section 505 has an annular mounting groove, and multiple arc-shaped heating elements 306 are evenly arranged around the circumference of the mounting groove to ensure comprehensive heating and uniform temperature distribution. The heating temperature can be adjusted according to the characteristics of the mixed materials to meet the temperature requirements when mixing the adhesive and the spherical silica, thus promoting thorough material integration. Simultaneously, heat insulation gaps are reserved between adjacent arc-shaped heating elements 306. This prevents excessively high local temperatures caused by heat conduction between the heating elements, avoiding material charring or damage to the spherical silica structure. It also reduces heat loss, improves heating efficiency, and ensures that the mixed material reaches the temperature conditions required for subsequent molding, providing a stable process guarantee for the subsequent molding of the insulation pipe.

[0052] The molding mechanism includes a molding die head 401, a shaping sleeve 402, and an extrusion port 403. The molding die head 401 is connected to the discharge end of the mixing cylinder 301. The shaping sleeve 402 is coaxially arranged on the outlet side of the molding die head 401, and the extrusion port 403 is formed at the end of the shaping sleeve 402.

[0053] Specifically, the forming mechanism, as a key link connecting the mixing process and the final forming, achieves a seamless connection from material homogenization to the finished product prototype, adapting to the continuous and integrated operation requirements in industrial production. The forming die head 401 is connected to the discharge end of the mixing cylinder 301, and its internal channel is consistent with the conveying direction of the mixing cylinder 301 and the rotating screw 302, ensuring that the fully mixed material can smoothly and continuously enter the forming die head 401. The die head is equipped with a forming cavity adapted to the specifications of the insulation pipe, and the inner diameter can be adjusted according to production needs to achieve forming adaptation of insulation pipes of different specifications.

[0054] The shaping sleeve 402 is coaxially sleeved on the outlet side of the forming die head 401 and aligned with the die head. It has a shaping channel inside that matches the finished size of the insulation pipe. When the material is extruded from the forming die head 401, it immediately enters the channel of the shaping sleeve 402. By controlling the temperature and air speed inside the shaping sleeve 402, it is quickly cooled and shaped to prevent the material from deforming due to its own weight or external force, and to ensure that the outer diameter, roundness and other dimensions of the insulation pipe meet the production standards.

[0055] The extrusion port 403 is formed at the end of the shaping sleeve 402 and is seamlessly connected with the subsequent forming equipment. The material after shaping is directly output from the extrusion port 403 to form a heat insulation pipe blank with uniform structure and smooth surface. There is no need for additional transfer links, which reduces the loss and pollution of materials during the transfer process and ensures that the mixed materials can be quickly transformed into a molded blank that meets the requirements. This realizes the integrated connection from material mixing to preliminary forming, improves production efficiency, and ensures the stability of the forming quality of the heat insulation pipe.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A uniform mixing device for the production of spherical silicon heat-insulating pipes, characterized in that: Includes a base (101) and a drive mechanism (102); The drive mechanism (102) is disposed on the base (101), and a mixing component and a premixing component are provided on one side of the drive mechanism (102); The premixing component includes a first hopper (201), a second hopper (202), and a premixing cylinder. The first hopper (201) is used to dispense adhesive, and the second hopper (202) is used to dispense spherical silicon. The first hopper (201) is located at the top of the premixing cylinder, the second hopper (202) is located on the side of the premixing cylinder, and the outlet of the second hopper (202) is arranged along the tangential direction of the premixing cylinder; The premixing cylinder is equipped with a dispensing component, which is used to uniformly fill the silica gel into the adhesive. The mixing assembly includes a mixing cylinder (301), a rotating screw (302), and multiple sets of annular perforated partitions (304). The mixing cylinder (301) and the rotating screw (302) are coaxial and rotate in opposite directions. The annular perforated partitions (304) are fixed axially at intervals on the inner wall of the mixing cylinder (301). The mixing cylinder (301) is connected to the premixing cylinder; A forming mechanism is provided at one end of the mixing cylinder (301) away from the driving mechanism (102); The premixing cylinder is fixedly installed on the base (101) and is in a static state; The premixing cylinder is provided with a feed ring (211) at one end near the mixing cylinder (301). The feed ring (211) is mounted on the base (101) and is connected to the mixing cylinder (301) through a rotary seal. The driving mechanism (102) is connected to the mixing cylinder (301) and the rotating screw (302) respectively, and is used to drive the mixing cylinder (301) and the rotating screw (302) to rotate coaxially and in opposite directions. The rotating screw (302) is used to extrude and convey the material in the mixing cylinder (301). The premixing cylinder includes a main cylinder (203) and a secondary cylinder (204). The main cylinder (203) is located at the feed inlet of the feed ring (211), and the secondary cylinder (204) is connected to the main cylinder (203) through an inclined tube. The material distribution component includes a support rod (205), which is inserted into the secondary cylinder (204). The support rod (205) is provided with a discharge plate (206), a guide plate (207), a control plate (208), and a limiting plate (209) from bottom to top. An adhesive storage cavity is formed between the top of the limiting plate (209) and the inner wall of the sub-cylinder (204), and a spherical silicon storage cavity is formed between the top of the discharge plate (206), the bottom of the control plate (208), and the inner wall of the sub-cylinder (204). The discharge plate (206) and the control plate (208) are both fixedly connected to the auxiliary cylinder (204), and the guide plate (207) and the limiting plate (209) are both rotatably connected to the support rod (205); The bottom of the auxiliary cylinder (204) is provided with a drive motor (112), and the drive motor (112) is connected to the support rod (205) in a transmission connection; The discharge plate (206) is provided with a fan-shaped discharge port; The guide plate (207) is a cross-shaped plate with a central bushing and extending symmetrically in four directions; When the guide plate (207) rotates with the support rod (205), its four sets of arms push the spherical silicon in the spherical silicon storage cavity to the fan-shaped discharge port, so that the spherical silicon falls evenly into the main cylinder (203); The limiting plate (209) has a limited flow hole for controlling the flow rate of the adhesive; The material control plate (208) is provided with a flow channel for guiding the adhesive; The flow channel is connected to the flow-limiting hole, and the adhesive flows out through the flow-limiting hole and the flow channel and coats the falling silicon ball surface. The spherical silicon storage cavity is sequentially configured along the circumferential direction as a storage section (501), a gradual transition section (502), and a flat circulation section (503). The storage section (501) forms an annular cavity for accommodating spherical silicon. The cavity height of the gradual transition section (502) gradually decreases from the material storage section (501) toward the fan-shaped discharge port of the discharge plate (206); The flat annular flow section (503) constitutes an annular channel with equal cavity height; The first hopper (201) is connected to the adhesive storage cavity; The second hopper (202) is connected to the spherical silicon storage cavity; The rotating screw (302) is configured as a front mixing section and a rear dispersing section along the material conveying direction; The spiral blades (303) of the front mixing section are provided with an array of through mixing holes; The outer edge of the spiral blade (303) of the rear dispersion section is formed with circumferentially spaced flexible comb-like teeth. Multiple sets of the annular perforated partitions (304) are arranged at equal intervals along the material conveying direction and are respectively set at the front mixing section and the rear dispersing section of the rotating screw (302); Among them, the annular perforated partition (304) located at the front mixing section is provided with an array of material passage holes. The diameter of the array of material passage holes is larger than the diameter of the mixing holes, and the number of the array of material passage holes is greater than the number of the mixing holes. The annular perforated partition (304) located at the rear dispersion section has an annularly distributed elongated material passage groove. The extension direction of the elongated material passage groove corresponds to the distribution direction of the flexible comb teeth, and the width of the elongated material passage groove is greater than the thickness of the flexible comb teeth.

2. The uniform mixing device for producing spherical silicon heat-insulating pipes according to claim 1, characterized in that: A gear box (103) is provided on one side of the feed ring (211). A driven shaft (104) and a gear ring (105) are provided inside the gear box (103). A first drive gear (106) and a second drive gear (107) are provided on the driven shaft (104). The mixing cylinder (301) is provided with a drive rod (108), one end of the drive rod (108) is provided with a third drive gear (109), the rotating screw (302) is sleeved on the drive rod (108), and one end of the rotating screw (302) is provided with a fourth drive gear (111). The drive rod (108) is connected to the drive mechanism (102) in a transmission connection. The third drive gear (109) is connected to the first drive gear (106) through the gear ring (105). The second drive gear (107) is connected to the fourth drive gear (111) in a transmission connection.

3. The uniform mixing device for producing spherical silicon heat-insulating pipes according to claim 2, characterized in that: The spiral blades (303) of the rotating screw (302) are made of polypropylene.

4. The uniform mixing device for producing spherical silicon heat-insulating pipes according to claim 1, characterized in that: An outer cylinder (305) is fixedly provided on the base (101), and the mixing cylinder (301) is rotatably sleeved inside the outer cylinder (305); The mixing cylinder (301) is divided into a normal temperature section (504) and a heating section (505) along the material conveying direction. The inner diameter of the heating section (505) is smaller than the inner diameter of the normal temperature section (504). The inner wall of the heating section (505) is provided with an annular mounting groove, and multiple arc-shaped heating elements (306) are evenly distributed in the annular mounting groove along the circumference. A heat insulation gap is left between two adjacent arc-shaped heating elements (306).

5. The uniform mixing device for producing spherical silicon heat-insulating pipes according to claim 1, characterized in that: The molding mechanism includes a molding die head (401), a shaping sleeve (402), and an extrusion port (403). The forming die (401) is connected to the discharge end of the mixing cylinder (301), the shaping sleeve (402) is coaxially arranged on the outlet side of the forming die (401), and the extrusion port (403) is formed at the end of the shaping sleeve (402).

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