A static mixer for the layered delivery of a latex base and a sensitizer

Abstract

The utility model relates to industrial mixing equipment technical field discloses a latex matrix and sensitizing agent layered conveying static mixer, including the pipe body, the inside fixed of pipe body is equipped with mixing unit, the inner wall fixed of pipe body top is equipped with the support ring, the top of support ring is fixed and installed with the mounting ring through screw, the bottom of mounting ring is equipped with premixing bucket fixedly, premixing bucket and support ring interpenetrate and connect, the inside of premixing bucket is equipped with flow guide subassembly, the bottom of premixing bucket is equipped with several distribution holes, the top of pipe body is equipped with several sensitizing agent input port, through the vertical pipe and the input component of surrounding, can to latex matrix and sensitizing agent layered input, through setting premixing bucket, flow guide subassembly and the input component of surrounding, realized sensitizing agent from single pipe body top to the multiple point annular uniform input of premixing bucket inside.

Description

Technical Field

[0001] This utility model relates to the field of industrial mixing equipment technology, specifically a static mixer for layered conveying of latex matrix and sensitizer. Background Technology

[0002] In the production process of emulsion explosives, chemical sensitizers, such as sodium nitrite aqueous solution, need to be uniformly mixed into the flowing latex matrix at a low flow rate to induce microchemical reactions and generate uniformly distributed sensitized bubbles. Static mixers are widely used in continuous production processes due to their advantages of having no moving parts, compact structure, easy sealing, and low maintenance costs. In the production of emulsion explosives, static mixers have also been used to mix a small amount of chemical sensitizer into the flowing latex matrix.

[0003] However, conventional static mixers, when handling such special two-phase fluids, employ single-point injection. The significant differences in density and viscosity between the high-viscosity latex matrix and the low-viscosity sensitizer solution result in an excessively small and uneven initial contact area before entering the mixing unit, placing a heavy burden on subsequent mixing. To ensure the structural stability of the latex matrix, the mixing process must be carried out under low flow rate and low shear conditions. Under these flow conditions, the mixing efficiency of conventional static mixing elements, such as spiral vanes and corrugated plates, which rely on fluid segmentation and rearrangement, decreases significantly. For systems with large viscosity differences, a "slip flow" phenomenon easily occurs, meaning that the low-viscosity sensitizer flow is not effectively segmented and encapsulated, leading to macroscopic or microscopic mixing dead zones and poor product uniformity. When the feed flow rate or ratio fluctuates, conventional static mixers, lacking an effective pre-dispersion mechanism, are prone to significant fluctuations in mixing quality, affecting the stability of product performance.

[0004] Therefore, existing static mixers are unable to achieve rapid and uniform dispersion of trace amounts of low-viscosity fluid in high-viscosity fluid under low-shear conditions, resulting in poor mixing performance. There is an urgent need for an optimized design for such special mixing scenarios. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a static mixer for the layered delivery of latex matrix and sensitizer, which has the advantages of good dispersion effect and improved mixing quality, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a static mixer for layered delivery of latex matrix and sensitizer, comprising a tube body, a mixing unit fixedly disposed inside the tube body, a support ring fixedly disposed on the inner wall of the top of the tube body, an installation ring fixedly disposed on the top of the support ring by screws, a premixing tank fixedly disposed on the bottom of the installation ring, the premixing tank being interlocked with the support ring, a flow guiding component disposed inside the premixing tank, a plurality of distribution holes being opened at the bottom of the premixing tank, a plurality of sensitizer inlets being opened at the top of the tube body, and a surrounding input component for feeding the sensitizer inlets being disposed at the top of the tube body.

[0007] As a preferred embodiment of this utility model, the flow guiding component includes a vertical rod, a spiral flow guiding plate welded to the surface of the vertical rod, the spiral flow guiding plate being welded to the inner wall of the premixing tank, a plurality of diagonal braces being welded to the bottom of the vertical rod, and a conical hopper being welded to the bottom end of the diagonal braces, the conical hopper being coaxial with the vertical rod.

[0008] As a preferred technical solution of this utility model, the surface of the support ring is provided with a threaded groove for threaded connection with the screw, and the top of the mounting ring is provided with a countersunk hole for mounting the screw, and a silicone cap for protecting the screw is engaged at the top of the countersunk hole.

[0009] As a preferred embodiment of this utility model, the top of the support ring is provided with an annular groove, and a sealing gasket is engaged inside the annular groove, the sealing gasket being located at the bottom end of the mounting ring.

[0010] As a preferred embodiment of this utility model, the surrounding input component includes an annular guide shroud, which is welded to the top of the tube body. The sensitizer inlet and the annular guide shroud are located on the same horizontal plane. The input end of the annular guide shroud is fixedly provided with a connector, and the input end of the connector is fixedly provided with a sensitizer delivery tube.

[0011] As a preferred embodiment of this utility model, the input end of the connector is welded with a connecting flange one, and the output end of the sensitizer delivery pipe is welded with a connecting flange two. The connecting flange one is fixedly connected to the connecting flange two by bolts.

[0012] As a preferred technical solution of this utility model, a vertical plate is provided in the middle of one side of the pipe body, and a horizontal plate is welded to the top and bottom of one side of the vertical plate. The horizontal plate is welded to the pipe body, and mounting holes are provided at the four corners of the vertical plate.

[0013] As a preferred embodiment of this utility model, the mixing unit is welded to the inner wall of the pipe, and mounting flanges are welded to both ends of the pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This static mixer for layered delivery of latex matrix and sensitizer enables the layered input of latex matrix and sensitizer through a riser and a surrounding input assembly. By setting up a premixing tank, a flow guiding assembly, and a surrounding input assembly, the sensitizer is uniformly input into the premixing tank from multiple points in a ring from the top of a single tube. When the latex matrix flows in from one end of the tube and passes through the premixing tank, it forms a swirling flow under the guidance of the spiral guide plate. At the same time, the sensitizer is uniformly injected into the premixing tank through multiple surrounding input ports. Under the action of the swirling flow, preliminary, macroscopic diffusion and mixing are achieved, effectively solving the problems of small initial contact area and uneven distribution caused by traditional single-point injection, laying a good foundation for subsequent fine mixing.

[0015] 2. This static mixer for layered delivery of latex matrix and sensitizer allows the initially mixed fluid to enter the downstream pipeline through distribution holes at the bottom of the premixing tank, forming multiple fine streams. Under low shear conditions, the mixing unit achieves deep and uniform micro-mixing by continuously dividing, changing direction, and re-merging the fluid. This breaks down the complex mixing task into two continuous and more controllable stages, significantly overcoming the shortcomings of conventional static mixers in terms of low mixing efficiency for fluids with high viscosity differences at low flow rates. It also avoids the "slippage" phenomenon and ensures the uniformity and stability of the final product. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the tube body of this utility model; Figure 4 This is a schematic diagram of the structure of the premixing tank of this utility model; Figure 5 This is a schematic diagram of the flow guiding component of this utility model; Figure 6 This is a schematic diagram of the structure of the surround input component of this utility model.

[0017] In the diagram: 1. Pipe body; 2. Support ring; 3. Mounting ring; 4. Premix tank; 5. Flow guide assembly; 501. Vertical pole; 502. Spiral guide plate; 503. Diagonal brace; 504. Conical hopper; 6. Sensitizer inlet; 7. Surrounding inlet assembly; 701. Annular flow guide shroud; 702. Connector; 703. Connecting flange one; 704. Connecting flange two; 705. Sensitizer delivery pipe; 8. Sealing gasket; 9. Threaded groove; 10. Countersunk hole; 11. Silicone cap; 12. Distribution hole; 13. Mounting flange; 14. Horizontal plate; 15. Vertical plate; 16. Mixing unit. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6 A static mixer for layered delivery of latex matrix and sensitizer includes a tube body 1. A mixing unit 16 is fixed inside the tube body 1 for low-shear segmentation and recombination of the fluid. A support ring 2 is fixed on the inner wall of the top of the tube body 1. An installation ring 3 is fixed to the top of the support ring 2 by screws. A premixing tank 4 is fixed to the bottom of the installation ring 3. The premixing tank 4 is interlocked with the support ring 2. The premixing tank 4 can be installed and removed through the support ring 2 and the installation ring 3. A flow guiding component 5 is provided inside the premixing tank 4, which enables the latex matrix and sensitizer to form a swirling flow. Under the action of the swirling flow, a preliminary, macroscopic diffusion and mixing are achieved. Several distribution holes 12 are opened at the bottom of the premixing tank 4. Several sensitizer inlets 6 are opened at the top of the tube body 1. A surrounding input component 7 is provided at the top of the tube body 1 to feed the sensitizer inlets 6. The surrounding input component 7 can feed the sensitizer, realizing the multi-point annular uniform input of the sensitizer from the top of a single tube body 1 into the interior of the premixing tank 4. In this embodiment, preferably, the flow guiding component 5 includes a vertical rod 501, a spiral guide plate 502 welded to the surface of the vertical rod 501, the spiral guide plate 502 being welded to the inner wall of the premixing tank 4, thereby forming a spiral downward flow channel in the premixing tank 4, a plurality of radially distributed diagonal braces 503 being welded to the bottom of the vertical rod 501, a conical hopper 504 being welded to the bottom end of the diagonal braces 503, the conical hopper 504 being coaxial with the vertical rod 501, the diagonal braces 503 being able to support the conical hopper 504, allowing the conical hopper 504 to be fed through the middle of the pipe body 1; In this embodiment, preferably, the surrounding input component 7 includes an annular guide shroud 701, which is welded to the top of the tube body 1. The sensitizer inlet 6 is located on the same horizontal plane as the annular guide shroud 701. A connector 702 is fixedly provided at the input end of the annular guide shroud 701, and a sensitizer delivery pipe 705 is fixedly provided at the input end of the connector 702. The sensitizer delivered from the outside can be introduced into the annular guide shroud 701 and evenly distributed to each sensitizer inlet 6. A connecting flange 1 703 is welded to the input end of the connector 702, and a connecting flange 2 704 is welded to the output end of the sensitizer delivery pipe 705. The connecting flange 1 703 is fixedly connected to the connecting flange 2 704 by bolts, which facilitates installation and disassembly. In this embodiment, preferably, the surface of the support ring 2 is provided with a threaded groove 9 for threaded connection with the screw, and the top of the mounting ring 3 is provided with a countersunk hole 10 for screw installation. The screw can be installed through the countersunk hole 10 and the threaded groove 9. The top of the countersunk hole 10 is engaged with a silicone cap 11 to protect the screw. The silicone cap 11 can protect the screw and prevent it from being exposed to the outside. The top of the support ring 2 is provided with an annular groove, and a sealing washer 8 is engaged inside the annular groove. The sealing washer 8 is located at the bottom of the mounting ring 3 to ensure the sealing between the support ring 2 and the mounting ring 3. In this embodiment, preferably, a vertical plate 15 is provided in the middle of one side of the pipe body 1, and a horizontal plate 14 is welded to the top and bottom of one side of the vertical plate 15. The horizontal plate 14 is welded to the pipe body 1. Mounting holes are provided at the four corners of the vertical plate 15, which can be used to fix the entire mixer to an external support or foundation to enhance its operational stability. The mixing unit 16 is welded to the inner wall of the pipe body 1, and mounting flanges 13 are welded to both ends of the pipe body 1, which can connect the pipe body 1 to the latex matrix pipe.

[0020] When in use, firstly, using the mounting holes on the side plate 15 of the pipe body 1, the entire mixer is firmly installed on the preset support frame or process platform with bolts to ensure stable operation. Through the mounting flanges 13 at both ends of the pipe body 1, it is connected in series to the conveying pipeline of the emulsion explosive continuous production line with bolts. Typically, the inlet end of the pipe body 1 is connected to the latex matrix conveying pipeline, and the inlet end is close to the end of the premixing tank 4. The outlet end is connected to the subsequent process equipment, such as the charging machine or storage tank. The external sensitizer delivery pipe is connected to the connecting flange 703 on the connector 702 surrounding the input component 7 via the connecting flange 704 at its end, such as sodium nitrite aqueous solution, and is secured with bolts to ensure a leak-free seal. In this way, the sensitizer can enter the annular cavity of the annular guide shroud 701 through the sensitizer delivery pipe 705 and the connector 702. Turn on the latex matrix feeding system so that the latex matrix flows in from the inlet end of the tube 1 at a low flow rate set by the process, in order to maintain its structural stability and avoid high shear. After the latex matrix flow rate stabilizes, turn on the sensitizer metering and delivery system to deliver the precisely metered sensitizer to the mixer through the surrounding input component 7. When the equipment is put into operation, the latex matrix flows into the pipe body 1 and enters the premixing tank 4 area. Inside the premixing tank 4, the latex matrix is ​​forced to flow by the spiral guide plate 502 in the flow guiding component 5, forming a swirling flow inside the tank. At the same time, the sensitizer solution is evenly distributed from the annular guide shroud 701 to each sensitizer inlet 6 around the top of the pipe body 1, thus injecting it into the rotating and downward flowing latex matrix in a multi-point, annular, and circumferentially uniform manner. This design fundamentally changes the traditional single-point injection mode, greatly increasing the initial contact area and contact opportunities of the two-phase flow. Under the shearing and entrainment effect of the swirling flow, the low-viscosity sensitizer is rapidly torn apart and elongated, achieving preliminary, macroscopic diffusion and mixing in the high-viscosity latex matrix, creating extremely favorable conditions for subsequent deep mixing. The initially mixed fluid continues to flow down to the bottom of the premixing tank 4. Guided by the conical hopper 504, the fluid is forced through several distribution holes 12 evenly distributed around the conical hopper 504 on the bottom plate of the premixing tank 4. This process "physically divides" a relatively coarse mixed fluid into multiple fine, parallel fluid streams, achieving clear stratified delivery and simplifying the mixing task before entering the fine mixing stage. The multiple streams of finely divided fluid flowing out of the distribution hole 12 then enter the downstream static mixing unit 16. The spiral blades of the mixing unit 16 continuously and gently divide, change the direction of flow, rearrange and merge each of the flowing fluid streams. This process is repeated continuously at the microscale, so that the sensitizer, which has been initially dispersed and first stratified in the premixing stage, further achieves molecular-level diffusion and uniform distribution in the latex matrix, thereby generating a sensitized latex containing uniform and fine sensitized bubbles, which is finally discharged from the outlet end of the tube 1.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A static mixer for layered delivery of latex matrix and sensitizer, comprising a tube (1), characterized in that: The pipe body (1) is fixedly provided with a mixing unit (16), and a support ring (2) is fixedly provided on the inner wall of the top of the pipe body (1). The top of the support ring (2) is fixedly installed with an installation ring (3) by screws. The bottom of the installation ring (3) is fixedly provided with a premixing tank (4). The premixing tank (4) is interlocked with the support ring (2). The premixing tank (4) is provided with a flow guiding component (5). The bottom of the premixing tank (4) is provided with several distribution holes (12). The top of the pipe body (1) is provided with several sensitizer inlets (6). The top of the pipe body (1) is provided with a surrounding input component (7) for feeding the sensitizer inlets (6).

2. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: The flow guiding component (5) includes a vertical pole (501), a spiral flow guiding plate (502) is welded to the surface of the vertical pole (501), the spiral flow guiding plate (502) is welded to the inner wall of the premixing tank (4), a number of diagonal braces (503) are welded to the bottom of the vertical pole (501), and a conical bucket (504) is welded to the bottom end of the diagonal brace (503), the conical bucket (504) is coaxial with the vertical pole (501).

3. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: The surface of the support ring (2) is provided with a threaded groove (9) for threaded connection with the screw, and the top of the mounting ring (3) is provided with a countersunk hole (10) for screw installation. The top of the countersunk hole (10) is engaged with a silicone cap (11) to protect the screw.

4. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: The top of the support ring (2) is provided with an annular groove, and a sealing gasket (8) is engaged inside the annular groove. The sealing gasket (8) is located at the bottom end of the mounting ring (3).

5. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: The surrounding input assembly (7) includes an annular flow guide (701), which is welded to the top of the tube body (1). The sensitizer inlet (6) and the annular flow guide (701) are located on the same horizontal plane. The input end of the annular flow guide (701) is fixedly provided with a connector (702), and the input end of the connector (702) is fixedly provided with a sensitizer delivery tube (705).

6. The latex matrix and sensitizer stratified delivery static mixer according to claim 5, characterized in that: The input end of the connector (702) is welded with a connecting flange one (703), and the output end of the sensitizer delivery pipe (705) is welded with a connecting flange two (704). The connecting flange one (703) is fixedly connected to the connecting flange two (704) by bolts.

7. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: A vertical plate (15) is provided in the middle of one side of the tube body (1). A horizontal plate (14) is welded to the top and bottom of one side of the vertical plate (15). The horizontal plate (14) is welded to the tube body (1). Mounting holes are provided at the four corners of the vertical plate (15).

8. The latex matrix and sensitizer stratified delivery static mixer according to claim 1, characterized in that: The mixing unit (16) is welded to the inner wall of the pipe body (1), and both ends of the pipe body (1) are welded with mounting flanges (13).

Images