Integrated preparation device of microcapsule fire extinguishing patch and use method

Abstract

The invention discloses an integrated preparation device of a microcapsule fire extinguishing patch and a use method, and relates to the technical field of fire extinguishing equipment. The device comprises a coaxial needle head assembly and a material mixing assembly, the coaxial needle head assembly is connected with a curing channel, the material mixing assembly comprises an outer shell, a middle cover is connected into the outer shell, the middle cover is provided with a material guiding channel, and the whole middle cover is of a funnel-shaped structure. The outer shell is connected with an adhesive channel, the lower end of the outer shell is connected with a material mixing channel, a guide column is connected into the material mixing channel and connected with a plurality of sets of spiral blades, the spiral directions of every two adjacent sets of spiral blades are opposite, and the fire extinguishing microcapsules are guided into the material mixing channel through the material guiding channel of the middle cover and evenly mixed along with flowing of an adhesive under the action of the spiral blades. The coaxial needle head assembly is connected with the material mixing assembly through the curing channel, so that the prepared fire-extinguishing microcapsules are uniformly mixed with the adhesive through the material mixing assembly and the material mixing channel in time, and the problems that the existing preparation efficiency is low and the performance of the fire-extinguishing microcapsules is easily influenced are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire extinguishing equipment, and in particular relates to an integrated preparation device and a use method of a microcapsule fire extinguishing patch. Background Art

[0002] Fire-extinguishing patches are made by combining fire-extinguishing microcapsules with an adhesive. They are suitable for use in confined spaces where fires are likely to ignite, such as cable connections in power grid equipment and energy storage systems. Traditionally, the microcapsules have been prepared and then mixed with an adhesive to create the patch.

[0003] For example, Chinese invention CN119350998A discloses a fire extinguishing patch and its preparation method, which comprises first preparing an adhesive solution, then adding fire extinguishing microcapsules to the adhesive solution in several batches; dripping the adhesive solution with added fire extinguishing microcapsules into a patch mold, and finally removing the patch from the patch mold after curing to obtain a fire extinguishing patch.

[0004] The existing fire extinguishing patch preparation process requires the preparation of fire extinguishing microcapsules first. The preparation of fire extinguishing microcapsules and the preparation of fire extinguishing patches are two independent processes. The compatibility between the equipment is poor, the process is complicated and time-consuming, and the overall preparation efficiency is low.

[0005] In addition, the transfer of materials between processes can easily lead to interface contamination, and the fire-extinguishing microcapsules are easily eroded by temperature and humidity during transportation and storage, resulting in a decrease in the performance of the fire-extinguishing microcapsules, thereby affecting the overall performance of the fire-extinguishing patch. Summary of the Invention

[0006] The purpose of the present invention is to provide an integrated preparation device for a microcapsule fire extinguishing patch, which connects a coaxial needle assembly to a mixing assembly through a curing channel, so that the prepared fire extinguishing microcapsules are promptly mixed with an adhesive through the mixing assembly and the mixing channel, thereby solving the problems of low preparation efficiency and easily affected performance of the fire extinguishing microcapsules in the existing process.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention relates to an integrated preparation device and use method of a microcapsule fire extinguishing patch, comprising a coaxial needle assembly and a mixing assembly for preparing fire extinguishing microcapsules; the lower end of the coaxial needle assembly is connected to a curing channel, and a valve assembly is installed in the curing channel; the mixing assembly comprises an outer shell body connected to the curing channel, a middle cover is connected to the outer shell body, the middle cover has a material guide channel, and the whole has a funnel-shaped structure; the side wall of the outer shell body is connected to an adhesive channel, the lower end of the outer shell body is connected to the mixing channel, the lower end of the mixing channel has a constricted structure, and a guide column is connected inside, with a gap between the guide column and the inner wall of the mixing channel; the guide column is connected to a plurality of groups of spiral blades, the plurality of groups of spiral blades are arranged along the axial direction of the guide column, and the spiral directions of two adjacent groups of spiral blades are opposite, and are used to introduce the fire extinguishing microcapsules into the mixing channel through the material guide channel of the middle cover, and mix them evenly with the flow of the adhesive under the action of the spiral blades.

[0009] As a preferred technical solution of the present invention, the bottom wall of the outer shell is connected to a stirring channel, the lower end of the stirring channel is connected to the upper end of the mixing channel, and the lower end of the material guide channel is lower than the upper end of the stirring channel.

[0010] As a preferred technical solution of the present invention, a shaft sleeve is fixedly connected to the stirring channel through a plurality of first spokes, and a rotating shaft is rotatably connected to the shaft sleeve; the rotating shaft is connected to stirring blades arranged in a circumferential array, and the stirring blades are connected to blades extending between the middle cover and the bottom wall of the outer shell. The blades are driven by the adhesive entering the outer shell through the adhesive channel, so that the rotating shaft rotates, and the stirring blades are used to stir and mix the fire extinguishing microcapsules and the adhesive.

[0011] As a preferred technical solution of the present invention, the inner wall of the material guide channel is fixedly connected to a positioning column through a second spoke, a positioning hole is opened on the lower end surface of the positioning column, and the upper end of the rotating shaft is rotatably connected to the positioning hole.

[0012] As a preferred technical solution of the present invention, a hollow notch is provided on the side of the stirring blade.

[0013] As a preferred technical solution of the present invention, the upper end of the positioning column is in a conical structure.

[0014] As a preferred technical solution of the present invention, the inner wall of the mixing channel is coated with a hydrophobic coating.

[0015] A method for using an integrated preparation device for a microcapsule fire extinguishing patch comprises the following steps:

[0016] Step 1: The core material and the wall material for preparing the fire extinguishing microcapsules are respectively introduced into the corresponding needles in the coaxial needle assembly to prepare the fire extinguishing microcapsules;

[0017] Step 2: preparing an adhesive and injecting the adhesive into the mixing component through the adhesive channel;

[0018] Step 3: When the prepared fire extinguishing microcapsules reach the set amount, the valve assembly opens, the fire extinguishing microcapsules fall through the guide channel of the middle cover, and enter the mixing channel with the adhesive, and after being mixed by the spiral blades, they are extruded from the lower port of the mixing channel.

[0019] As a preferred technical solution of the present invention, the adhesive includes epoxy resin, flame retardant, toughening agent and curing agent, and the mass ratio is 12:4:3:1.

[0020] As a preferred technical solution of the present invention, the mass ratio of the fire extinguishing microcapsules to the adhesive is 1:1-2.

[0021] The present invention has the following beneficial effects:

[0022] The present invention connects the coaxial needle assembly with the mixing assembly through a curing channel, so that the prepared fire extinguishing microcapsules can enter the interior of the mixing assembly in a timely manner and be evenly mixed with the adhesive through the mixing channel, thereby effectively improving the compatibility between the preparation equipment of the fire extinguishing microcapsules and the preparation equipment of the fire extinguishing patch, simplifying the preparation process and improving the overall preparation efficiency.

[0023] At the same time, the fire extinguishing microcapsules are directly mixed with the adhesive inside the preparation device after preparation, which avoids the fire extinguishing microcapsules being easily eroded by temperature and humidity during transportation and storage, thereby effectively ensuring the overall performance of the fire extinguishing microcapsules and the fire extinguishing patch.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of an integrated preparation device for a microcapsule fire extinguishing patch according to the present invention;

[0027] Figure 2 for Figure 1 Front view of

[0028] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0029] Figure 4 for Figure 3A magnified view of the structure of the middle D section;

[0030] Figure 5 Schematic diagram of the structure of the mixing component and the mixing channel;

[0031] Figure 6 It is the structural explosion diagram of the mixing component;

[0032] Figure 7 for Figure 5 Cross-sectional view at the middle BB;

[0033] Figure 8 for Figure 5 Cross-sectional view at CC;

[0034] Figure 9 Schematic diagram of the structure of the outer shell;

[0035] Figure 10 Schematic diagram of the structure of the middle cover;

[0036] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0037] 1-coaxial needle assembly, 2-mixing assembly, 3-mixing channel, 4-rotating shaft, 101-curing channel, 102-valve assembly, 200-outer shell, 201-middle cover, 202-material guide channel, 203-adhesive channel, 204-stirring channel, 205-first spoke, 206-sleeve, 207-second spoke, 208-positioning column, 301-guide column, 302-spiral blade, 401-stirring blade, 402-blade, 403-hollow notch. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Example 1

[0041] See also Figures 1 to 3As shown, the present invention is an integrated preparation device for a microcapsule fire extinguishing patch, comprising a coaxial needle assembly 1 for preparing fire extinguishing microcapsules and a mixing assembly 2. The coaxial needle assembly 1 comprises a coaxially arranged inner phase needle, an outer phase needle and a driving phase needle, and the driving phase uses gas.

[0042] The lower end of the coaxial needle assembly 1 is connected to a curing channel 101. A pressure relief port is provided at the upper end of the curing channel 101, and a valve assembly 102 is installed within the curing channel 101. A lighting window is provided on the sidewall of the curing channel 101, or the curing channel 101 is made of a transparent material to facilitate external ultraviolet lighting to illuminate the interior of the curing channel 101 and achieve curing of the prepared fire-extinguishing microcapsules.

[0043] The valve assembly 102 includes a weighing sensor and a check valve. When the accumulated amount of the prepared fire extinguishing microcapsules reaches a set threshold, the check valve automatically opens, causing the prepared fire extinguishing microcapsules to fall.

[0044] like Figure 4 、 6 As shown in Figures 1 to 8, the mixing assembly 2 includes an outer shell 200 connected to the curing channel 101. The upper side of the outer shell 200 is connected to an upper cover, and the lower end of the curing channel 101 is fixedly connected to the upper cover. The upper cover is provided with a feed port corresponding to the curing channel 101, so that the cured fire extinguishing microcapsules enter the interior of the outer shell 200 through the feed port.

[0045] A middle cover 201 is connected to the outer shell 200, and is connected and fixed to the outer shell 200 by snapping, bonding or bolts. A material guide channel 202 is provided in the middle of the middle cover 201, and the whole is funnel-shaped, so that the fallen fire-extinguishing microcapsules are collected into the material guide channel 202 through the funnel-shaped middle cover 201 and roll downward through the material guide channel 202.

[0046] The side wall of the outer shell 200 is connected to the adhesive channel 203, and the lower end of the outer shell 200 is connected to the mixing channel 3. The lower end of the mixing channel 3 is a constricted structure, and a guide column 301 is connected inside. The inner wall of the mixing channel 3 is coated with a hydrophobic coating to facilitate the flow of the adhesive.

[0047] There is a gap between the guide post 301 and the inner wall of the mixing channel 3. For example, the inner wall of the mixing channel 3 is connected to the guide post 301 through rectangular spokes or cylindrical spokes, and the guide post 301 and the mixing channel 3 are coaxially arranged.

[0048] The guide column 301 is connected to several groups of spiral blades 302. The number of groups of spiral blades 302 can be flexibly set according to the length of the mixing channel 3. The inclination angle of the spiral blades 302 is 45° to 60°, such as 55°. Several groups of spiral blades 302 are arranged axially along the guide column 301, and the spiral directions of two adjacent groups of spiral blades 302 are opposite.

[0049] The fire-extinguishing microcapsules enter the outer shell 200 through the guide channel 202 of the middle cover 201, while the adhesive enters the outer shell 200 through the adhesive channel 203. As the adhesive flows, the fire-extinguishing microcapsules are introduced into the mixing channel 3. During the flow, under the action of the spiral blades 302, the fluid segmentation and recombination principle is utilized to mix the fire-extinguishing microcapsules evenly with the adhesive flow. The microcapsules are ultimately extruded from the lower port of the mixing channel 3 and directly into the mold for preparing the fire-extinguishing patch, thereby achieving rapid preparation. The integrated preparation device can also be connected to a robotic arm to achieve three-dimensional trajectory dispensing, thereby increasing preparation flexibility.

[0050] The fire extinguishing microcapsules take less than 3 minutes from generation to packaging, reducing the storage and transportation process, thereby effectively isolating the contact with oxygen and water vapor. The measured aging rate is reduced to less than 2% / month. The compressive strength retention rate of the fire extinguishing microcapsules after 6 months of storage is greater than 90%, thereby effectively improving the overall aging inhibition effect and ensuring the overall performance of the fire extinguishing patch.

[0051] At the same time, the fire extinguishing microcapsule preparation device is effectively combined with the fire extinguishing patch preparation equipment, and the preparation process is simplified, so that the single batch production time is shortened from 8 hours to 0.5 hours (increased by 16 times), and the continuous production capacity is greater than 5m 2 / h; the energy consumption per unit area of ​​patch production is reduced by 78% (from 2.5kW·h / m 2 Reduced to 0.55kW·h / m 2 ), thereby effectively improving the overall preparation efficiency.

[0052] Example 2

[0053] like Figures 5-7 As shown, on the basis of Example 1, the bottom wall of the outer shell 200 is connected to a stirring channel 204, and the lower end of the stirring channel 204 is connected to the upper end of the mixing channel 3, wherein the diameter of the stirring channel 204 is smaller than the diameter of the outer shell 200 and larger than the outer diameter of the material guiding channel 202, and the lower end of the material guiding channel 202 is lower than the upper end of the stirring channel 204, so that the adhesive injected into the outer shell 200 is forced to flow downward under the action of the outer wall of the material guiding channel 202 and enter the stirring channel 204.

[0054] like Figure 4 、 9As shown in Figure 10 , a shaft sleeve 206 is fixedly connected to the stirring channel 204 via four to six first spokes 205. The shaft 4 is rotatably connected to the shaft sleeve 206. A positioning post 208 is fixedly connected to the inner wall of the material guide channel 202 via multiple second spokes 207. The upper end of the positioning post 208 is conical to prevent the fire-extinguishing microcapsules from accumulating on the upper end of the positioning post 208. The lower end of the positioning post 208 has a positioning hole, and the upper end of the rotating shaft 4 is rotatably connected to the positioning hole. The rotating shaft 4 is coaxially arranged with both the material guide channel 202 and the stirring channel 204.

[0055] The rotating shaft 4 is connected to stirring blades 401 arranged in a circular array, and the stirring blades 401 are connected to blades 402 extending between the middle cover 201 and the bottom wall of the outer shell 200. The adhesive channel 203 is axially arranged along the tangential direction of the outer shell 200 and connected to a position between the middle cover 201 and the bottom wall of the outer shell 200. The blades 402 are driven by the adhesive entering the outer shell 200 through the adhesive channel 203, causing the rotating shaft 4 to rotate, and the stirring blades 401 are used to stir and mix the fire extinguishing microcapsules and the adhesive.

[0056] At the same time, a hollow notch 403 is opened on the side of the stirring blade 401, so that the resistance encountered by the stirring blade 401 is reduced, which is beneficial to improving the rotation effect and stirring effect of the rotating shaft 4. Therefore, by adding the rotating shaft 4 and the stirring blade 401, the fire extinguishing microcapsules are initially mixed in the stirring channel 204, and then the mixing uniformity in the mixing channel 3 is improved to ensure the overall mixing effect.

[0057] Example 3

[0058] Based on Example 1 or Example 2, a method for using an integrated preparation device for a microcapsule fire extinguishing patch includes the following steps:

[0059] Step 1: The core material and wall material of the fire extinguishing microcapsule are respectively introduced into the corresponding needles of the coaxial needle assembly 1 to prepare the fire extinguishing microcapsule. The core material of the fire extinguishing microcapsule is perfluorohexanone and the shell material is photosensitive resin. The driving phase gas is nitrogen with a pressure of 0.2-0.5 MPa to form a shear force field with a shear rate of >500 s -1 During preparation, the flow rate ratio between the core material and the shell is 1:2, the driving phase gas pressure is 0.3 MPa, and the prepared fire-extinguishing microcapsules are cured by ultraviolet light irradiation during the falling process. The diameter of the prepared fire-extinguishing microcapsules is 200 to 800 μm, specifically set to 500 μm.

[0060] Step 2: prepare an adhesive and inject the adhesive into the mixing component 2 through the adhesive channel 203. The adhesive includes epoxy resin, flame retardant, toughening agent and curing agent, and the mass ratio is 12:4:3:1.

[0061] Step three: Continuously inject adhesive through the adhesive channel 203. When the prepared fire extinguishing microcapsules reach the set amount, the valve assembly 102 opens, and the fire extinguishing microcapsules fall through the guide channel 202 of the middle cover 201. At this time, the fire extinguishing microcapsules and the adhesive are stirred and mixed in the stirring channel 204 by the stirring blade 401, and enter the mixing channel 3 with the adhesive. After being mixed by the spiral blade 302, they are extruded from the lower port of the mixing channel 3 and directly coated on the mold for preparing the fire extinguishing patch. The thickness can be 1.5±0.1mm.

[0062] Among them, by controlling the addition amount of fire extinguishing microcapsules and the injection flow rate of the adhesive, the mass ratio of the fire extinguishing microcapsules to the adhesive is controlled to be 1:1-2, thereby ensuring that the prepared fire extinguishing patch has good overall performance.

[0063] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An integrated preparation device for a microcapsule fire extinguishing patch, characterized by: It comprises a coaxial needle assembly (1) and a mixing assembly (2) for preparing fire extinguishing microcapsules; the lower end of the coaxial needle assembly (1) is connected to a curing channel (101), and a valve assembly (102) is installed in the curing channel (101); The mixing assembly (2) comprises an outer shell (200) in communication with the curing channel (101), a middle cover (201) is connected to the outer shell (200), the middle cover (201) has a material guide channel (202), and the whole has a funnel-shaped structure; The side wall of the outer shell (200) is connected to an adhesive channel (203), and the lower end of the outer shell (200) is connected to a mixing channel (3). The lower end of the mixing channel (3) is a constricted structure, and is internally connected to a guide column (301). A gap is left between the guide column (301) and the inner wall of the mixing channel (3). The guide column (301) is connected to a plurality of groups of spiral blades (302), which are arranged axially along the guide column (301), and the spiral directions of two adjacent groups of spiral blades (302) are opposite, and are used to guide the fire extinguishing microcapsules into the mixing channel (3) through the guide channel (202) of the middle cover (201), and mix them uniformly with the flow of the adhesive under the action of the spiral blades (302).

2. The integrated preparation device for a microcapsule fire extinguishing patch according to claim 1, characterized in that: The bottom wall of the outer shell (200) is connected to a stirring channel (204), the lower end of the stirring channel (204) is connected to the upper end of the mixing channel (3), and the lower end of the material guiding channel (202) is lower than the upper end of the stirring channel (204).

3. The integrated preparation device of a microcapsule fire extinguishing patch according to claim 2, characterized in that: The stirring channel (204) is fixedly connected to a shaft sleeve (206) via a plurality of first spokes (205), and is rotatably connected to a rotating shaft (4) via the shaft sleeve (206); The rotating shaft (4) is connected to stirring blades (401) arranged in a circumferential array, and the stirring blades (401) are connected to blades (402) extending between the middle cover (201) and the bottom wall of the outer shell (200). The adhesive entering the outer shell (200) through the adhesive channel (203) drives the blades (402), causing the rotating shaft (4) to rotate, and the stirring blades (401) are used to stir and mix the fire extinguishing microcapsules and the adhesive.

4. The integrated preparation device for a microcapsule fire extinguishing patch according to claim 3, characterized in that: The inner wall of the material guide channel (202) is fixedly connected to a positioning column (208) via a second spoke (207); a positioning hole is provided on the lower end surface of the positioning column (208), and the upper end of the rotating shaft (4) is rotatably connected to the positioning hole.

5. An integrated preparation device for a microcapsule fire extinguishing patch according to claim 3 or 4, characterized in that: A hollow notch (403) is provided on the side of the stirring blade (401).

6. The integrated preparation device for a microcapsule fire extinguishing patch according to claim 4, characterized in that: The upper end of the positioning column (208) is in a conical structure.

7. The integrated preparation device for a microcapsule fire extinguishing patch according to claim 1, characterized in that: The inner wall of the mixing channel (3) is coated with a hydrophobic coating.

8. The method for using the integrated preparation device for a microcapsule fire extinguishing patch according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The core material and the wall material for preparing the fire extinguishing microcapsules are respectively introduced into the corresponding needles in the coaxial needle assembly (1) to prepare the fire extinguishing microcapsules; Step 2: preparing an adhesive and injecting the adhesive into the mixing component (2) through the adhesive channel (203); Step 3: When the prepared fire extinguishing microcapsules reach a set amount, the valve assembly (102) is opened, and the fire extinguishing microcapsules fall through the guide channel (202) of the middle cover (201), and enter the mixing channel (3) along with the adhesive, and after being mixed by the spiral blade (302), they are extruded from the lower port of the mixing channel (3).

9. The method for using the integrated preparation device for a microcapsule fire extinguishing patch according to claim 8, characterized in that: The adhesive comprises epoxy resin, flame retardant, toughening agent and curing agent, and the mass ratio is 12:4:3:

1.

10. The method for using the integrated preparation device for a microcapsule fire extinguishing patch according to claim 8 or 9, characterized in that: The mass ratio of the fire extinguishing microcapsules to the adhesive is 1:1-2.

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