Fire extinguishing microcapsule preparation system based on gravity fall

Abstract

The invention relates to the technical field of fire extinguishing microcapsule or microsphere manufacturing, in particular to a fire extinguishing microcapsule preparation system based on gravity fall. According to the technical scheme, the device comprises a material loading module, a flow control module, a water flow guiding module, a microcapsule forming module and a photocuring collecting module. The material loading module is used for loading various solutions for preparing microcapsules; the flow control module is used for controlling the flow velocity of each phase of liquid of the material loading module; the water flow guiding module is used for cutting and draining when the microcapsules are formed; and the light curing and collecting module is used for curing the outer phase of the formed microcapsule and collecting the microcapsule. The preparation system is simple to operate and easy to build, circulation of various solutions is achieved through a gravity fall structure, the speed of the solutions flowing into the needle head is controlled through the flow control module, unstable factors caused by frequent manual replacement of the solutions to microcapsule preparation are reduced, the system can be expanded into multiple paths to prepare the fire extinguishing microcapsules at the same time, and the fire extinguishing efficiency is improved. The microcapsule preparation efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing microcapsules or microspheres manufacturing, in particular to a fire extinguishing microcapsule preparation system based on gravity drop. Background Art

[0002] Microcapsules are tiny capsules formed by physically or chemically encapsulating sensitive or volatile small droplets or solid particles with polymer materials. The solid or liquid substance encapsulated inside the capsule is called the core material or core layer, and the coating formed by the polymer material is called the wall material or capsule wall.

[0003] Microcapsule fire extinguishing agent is an emerging fire extinguishing medium. The preparation of low-boiling point liquid fire extinguishing agent into microcapsule fire extinguishing agent can overcome the problems of instability, storage and carrying of existing low-boiling point liquid fire extinguishing agent. In recent years, microcapsule fire extinguishing agent has gradually been widely used in the fields of fire protection and fire protection of power equipment.

[0004] However, due to the characteristics of the preparation of fire extinguishing microcapsules, the existing preparation system has complicated procedures, and the manpower and time costs in the production process are very high, which is very inconvenient for large-scale promotion and use in multiple fields. How to build a preparation system that is easy to operate and use, and reduce the manpower and time costs in the production process is the technical problem to be solved by the present invention. Therefore, we propose a fire extinguishing microcapsule preparation system based on gravity drop. Summary of the invention

[0005] The purpose of the present invention is to propose a fire extinguishing microcapsule preparation system based on gravity drop to address the problems that the existing preparation system in the background technology has complicated procedures, high manpower and time costs in the production process, and is very inconvenient for large-scale promotion and use in multiple fields.

[0006] The technical solution of the present invention is a fire extinguishing microcapsule preparation system based on gravity drop, comprising:

[0007] A material loading module, used for loading a three-phase solution for preparing microcapsules;

[0008] A flow control module, used to control the flow rate of the three-phase solution of the material loading module;

[0009] A water flow guiding module is used for cutting and drainage during microcapsule forming;

[0010] Microcapsule forming module, used to form microcapsules with complete inner and outer phases;

[0011] A light-curing collection module, used for curing the outer phase of the formed microcapsules and collecting the microcapsules;

[0012] The material loading module, the flow control module, the microcapsule forming module and the water flow guiding module are connected through a silicone tube.

[0013] Optionally, the material loading module includes an operating table, three groups of sealed valved containers, and a first silicone tube, wherein the sealed valved containers are used to load a three-phase solution for preparing microcapsules, and the first silicone tube is used to connect the outlets of each of the sealed valved containers to a flow control module.

[0014] Optionally, the height of the operating table is 2-3m, and a three-layer design structure is adopted. The sealed valved container is located on the top layer of the operating table, the second layer of the operating table is used to place a flow control module, and the third layer of the operating table is used to place a water flow guiding module.

[0015] Optionally, the flow control module includes three groups of glass rotor flowmeters and a second silicone tube, the glass rotor flowmeter is used to control the flow rate of the three-phase solution, and the second silicone tube is used to connect the outlet of the glass rotor flowmeter to the corresponding position of the three-channel coaxial needle.

[0016] Optionally, the microcapsule forming module includes a three-channel coaxial needle and a thermoplastic tube. The three-channel coaxial needle is used to prepare fire-extinguishing microcapsules coated inside and outside. The thermoplastic tube is installed between the outlet of the three-channel coaxial needle and the cylindrical notch of the glass pipe to ensure the sealing of the preparation.

[0017] Optionally, the water flow guiding module includes a water reservoir, a small water pump, a ferrule-type micro-regulating valve, a glass pipe, a third silicone tube, and a fourth silicone tube. The small water pump is used to pump water out of the water reservoir, the ferrule-type micro-regulating valve is used to control the speed of the water flow, the third silicone tube is used to connect the small water pump and the inlet of the ferrule-type micro-regulating valve, and the fourth silicone tube is used to connect the outlet of the ferrule-type micro-regulating valve and the glass pipe.

[0018] Optionally, the photocuring collection module includes an ultraviolet lamp and a mesh screen, wherein the ultraviolet lamp is used to cure the microcapsules in the glass pipe, and the mesh screen is used to collect the cured microcapsules flowing out of the glass pipe.

[0019] Optionally, the glass pipe is 40-50 cm long and 0.5-1.5 cm in diameter, the glass pipe includes an A end and a B end, the A end of the glass pipe is parallel to the horizontal plane, the angle between the B end of the glass pipe and the horizontal plane is 140°-150°, and the glass pipe is provided with a cylindrical notch with a diameter of 0.3-0.7 cm and a height of 1-3 cm at a distance of 8-12 cm from the A end of the glass pipe, the notch is connected to the outlet of the three-channel coaxial needle, the glass pipe is used to assist in cutting the microcapsules flowing out of the outlet of the three-channel coaxial needle, and the water flow in the pipe can guide the microcapsules to flow into the mesh screen.

[0020] Optionally, the three-phase solution for preparing microcapsules includes: a perfluorohexanone solution forming an inner phase of the microcapsules, a photocurable solution forming an outer phase of the microcapsules, and an aqueous polyvinyl alcohol (PVA) aqueous solution having a cutting and shaping effect on the microcapsules.

[0021] Optionally, the silicone tube used to connect the various devices of the oil phase solution is a black silicone tube, and the remaining silicone tubes are transparent silicone tubes.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] The preparation system of the present invention has a simple structure and is easy to build, which can effectively reduce the cost of equipment;

[0024] Further, a large-capacity sealed valve container is used to assemble the three-phase solution for making fire-extinguishing microcapsules, and the sealed valve container is placed at a high place to circulate the solution through gravity drop. The principle is simple and easy to operate. Compared with the traditional method of controlling the flow rate of the syringe pump to push the syringe, the method of controlling the flow of each phase of solution into the needle to prepare microcapsules reduces the frequency of manual replacement of the solution after use and reduces the instability caused by factors such as improper operation during the replacement process;

[0025] Furthermore, the system can divide the solution into multiple portions through a diversion device after the solution flows out of the sealed valved container, and expand it into multiple paths to prepare fire extinguishing microcapsules at the same time, which can effectively improve the efficiency of preparing fire extinguishing microcapsules. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A block diagram of the fire extinguishing microcapsule preparation system based on gravity drop of the present invention is given;

[0027] Figure 2 It is a structural schematic diagram of a glass pipe;

[0028] Figure 3 This is a structural diagram of the components of the fire extinguishing microcapsule preparation system based on gravity drop of the present invention.

[0029] Figure numerals: 1. operating table; 2. sealed container with valve; 3. glass rotor flowmeter; 4. three-channel coaxial needle; 5. thermoplastic tube; 6. water reservoir; 7. small water pump; 8. ferrule-type micro-regulating valve; 9. glass pipe; 10. ultraviolet lamp; 11. mesh screen; S1. first silicone tube; S2. second silicone tube; S3. third silicone tube; S4. fourth silicone tube. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] Example

[0032] like Figures 1 to 3 As shown, the present invention proposes a fire extinguishing microcapsule preparation system based on gravity drop, which includes a material loading module, a flow control module, a water flow guiding module, a microcapsule forming module and a light curing collection module. Each module is described in detail below.

[0033] In this embodiment, the material loading module is used to load the three-phase solution for preparing microcapsules, and includes an operating table 1, three sets of sealed valved containers 2, and a first silicone tube S1. The sealed valved containers 2 are used to load the three-phase solution for preparing microcapsules, and the first silicone tube S1 is used to connect the outlets of each sealed valved container 2 to the flow control module;

[0034] The height of the operating table 1 is preferably 2.5m, and a three-layer design structure is adopted. The capacity of the sealed valved container 2 is preferably 5L. The sealed valved container 2 is located on the highest layer of the operating table 1, and the vertical height difference with the three-channel coaxial needle should be greater than 2m to ensure that the solution in the sealed valved container can flow into the flow control module by gravity. The second layer of the operating table 1 is used to place the flow control module, and the third layer of the operating table 1 is used to place the water flow guide module;

[0035] In this embodiment, the three-phase solution for preparing microcapsules includes: a perfluorohexanone solution forming the inner phase of the microcapsules, a photocurable solution forming the outer phase of the microcapsules, and an aqueous polyvinyl alcohol (PVA) aqueous solution having a cutting and shaping effect on the microcapsules. The three sealed valved containers 2 are respectively filled with a perfluorohexanone solution, a photocurable solution, and an aqueous solution containing 5% PVA. The perfluorohexanone is used as the inner phase of the fire-extinguishing microcapsules. When the microcapsules burst when heated, they play a role in extinguishing fire. The photocurable solution is used as the outer phase of the fire-extinguishing microcapsules. When it encounters ultraviolet light, it will change from liquid to solid to wrap the inner phase perfluorohexanone. The PVA aqueous solution plays a role in cutting the inner and outer phases of the microcapsules and balancing the tension between the inner and outer phases. When the water valve is opened, the three solutions flow out from the valve port of the sealed valved container 2 by gravity and flow into the corresponding glass rotor flowmeter 3 in the flow control module through the silicone tube.

[0036] Further, the flow control module is used to control the flow rate of the three-phase solution of the material loading module, including a glass rotor flowmeter 3 and a second silicone tube S2. The three groups of glass rotor flowmeters 3 are respectively used to control the flow rate of the three-phase solution. The flow range of the glass rotor flowmeter 3 is 60-600mL / min. The flow control knob of the flowmeter can be adjusted to control the flow rate of the three solutions. The optimal flow rate range of the three-phase solution during production is: 80-200mL / min for the inner phase perfluorohexanone solution, 80-250mL / min for the outer phase photocuring solution, and 200-500mL / min for the aqueous phase PVA aqueous solution. The second silicone tube S2 is used to connect the outlet of each glass rotor flowmeter 3 to the corresponding position of the three-channel coaxial needle 4, that is, the outlets of the glass rotor flowmeter 3 filled with perfluorohexanone solution, photocuring solution, and PVA aqueous solution are respectively connected to the inner phase, middle phase, and outer phase of the three-channel coaxial needle 4;

[0037] It is worth noting that the microcapsule forming module is used to form microcapsules with inner and outer phases wrapped intact, including a three-channel coaxial needle 4 and a thermoplastic tube 5. The three-channel coaxial needle 4 is used to prepare fire-extinguishing microcapsules coated with inner and outer phases. The selected three-channel coaxial needle 4 has a solution inlet size of 16G / 20G / 30G, that is, the inner diameter of the outer phase channel is 1.16mm, and the outer diameter is 1.60mm; the inner diameter of the middle phase channel is 0.6mm, and the outer diameter is 0.9mm; the inner diameter of the inner phase channel is 0.16mm, and the outer diameter is 0.31mm; the needle can prepare microcapsules with a diameter of 100-400μm with inner and outer phases wrapped intact. The thermoplastic tube 5 is installed at the outlet of the three-channel coaxial needle 4 and the cylindrical notch of the glass pipe 9, which can ensure the sealing of the needle outlet and the glass pipe 9 at the connection of the notch;

[0038] In this embodiment, the water flow guiding module is used for cutting and drainage during microcapsule forming, and includes a water reservoir 6, a small water pump 7, a sleeve-type micro-regulating valve 8, a glass pipe 9, a third silicone tube S3, and a fourth silicone tube S4. The small water pump 7 is used to pump water out of the water reservoir, the sleeve-type micro-regulating valve 8 is used to control the speed of the water flow, the third silicone tube S3 is used to connect the small water pump 7 and the inlet of the sleeve-type micro-regulating valve 8, and the fourth silicone tube S4 is used to connect the outlet of the sleeve-type micro-regulating valve 8 and the glass pipe 9. , the fourth silicone tube S4 is connected to the A end of the glass pipe 9, the water reservoir 6 is filled with water, the small water pump 7 pumps the water out of the water reservoir 6, and is connected to the inlet of the ferrule-type micro-regulating valve 8 through the third silicone tube S3, the ferrule-type micro-regulating valve 8 adjusts the flow rate of the extracted water flow, and the adjustment range is 100-2000mL / min. According to the experimental needs, the water flow rate is preferably 400-800mL / min, and the outlet of the ferrule-type micro-regulating valve 8 is connected to the A end of the glass pipe 9 through the fourth silicone tube S4;

[0039] Furthermore, the photocuring collection module is used to cure the outer phase of the formed microcapsules and collect the microcapsules, and includes an ultraviolet lamp 10 and a mesh 11. The ultraviolet lamp 10 is used to cure the microcapsules in the glass pipe 9. The wavelength of the ultraviolet lamp 10 is 365-405nm, and the power is preferably 10W. The mesh 11 is used to collect the cured microcapsules flowing out of the B end of the glass pipe 9. The ultraviolet lamp 10 is used to irradiate the formed microcapsules in the glass pipe 9. The distance between the ultraviolet lamp 10 and the A end of the glass pipe is 15-20cm. The microcapsules in the glass pipe 9 are cured, and the mesh 11 collects the cured microcapsules flowing out of the glass pipe 9.

[0040] Among them, the glass pipe 9 is used to circulate water flow and guide the microcapsules to flow into the mesh screen 11. The length of the glass pipe 9 is preferably 50 cm, and the diameter is preferably 1 cm. The glass pipe 9 includes an A end and a B end. The A end of the glass pipe 9 is parallel to the horizontal plane, and the angle between the B end of the glass pipe 9 and the horizontal plane is preferably 150°. The inclination angle of the B end is designed to facilitate the microcapsules to fall smoothly into the mesh screen. A cylindrical notch with a diameter of 0.5 cm and a height of 2 cm is set at 10 cm from the A end of the glass pipe 9. The notch is connected to the outlet of the three-channel coaxial needle 4. After the microcapsules flow out from the needle of the three-channel coaxial needle 4, they are cut by the water flow in the glass pipe 9 and guided by the water flow to flow into the mesh screen 11.

[0041] Finally, the material loading module, flow control module, microcapsule forming module, and water flow guiding module are connected by silicone tubes. Since the photocuring solution is easily cured when exposed to visible light, the devices with photocuring solution are connected with black silicone tubes, and the other devices are connected with transparent silicone tubes.

[0042] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A fire extinguishing microcapsule preparation system based on gravity drop, characterized in that: include: A material loading module, used for loading a three-phase solution for preparing microcapsules; A flow control module, used to control the flow rate of the three-phase solution of the material loading module; A water flow guiding module is used for cutting and drainage during microcapsule forming; Microcapsule forming module, used to form microcapsules with complete inner and outer phases; A light-curing collection module, used for curing the outer phase of the formed microcapsules and collecting the microcapsules; The material loading module, the flow control module, the microcapsule forming module and the water flow guiding module are connected through a silicone tube.

2. A fire extinguishing microcapsule preparation system based on gravity drop according to claim 1, characterized in that: The material loading module comprises an operating table (1), three groups of sealed valved containers (2), and a first silicone tube (S1). The sealed valved containers (2) are used to load a three-phase solution for preparing microcapsules. The first silicone tube (S1) is used to connect the outlet of the sealed valved container (2) to a flow control module.

3. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 2, characterized in that: The height of the operating table (1) is 2-3m, and a three-layer design structure is adopted. The sealed valved container (2) is located on the top layer of the operating table (1), the second layer of the operating table (1) is used to place a flow control module, and the third layer of the operating table (1) is used to place a water flow guide module.

4. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 2, characterized in that: The flow control module comprises three groups of glass rotor flowmeters (3) and a second silicone tube (S2). The glass rotor flowmeter (3) is used to control the flow rate of the three-phase solution, and the second silicone tube (S2) is used to connect the outlet of the glass rotor flowmeter (3) to the corresponding position of the three-channel coaxial needle (4).

5. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 4, characterized in that: The microcapsule forming module comprises a three-channel coaxial needle (4) and a thermoplastic tube (5). The three-channel coaxial needle (4) is used to prepare fire-extinguishing microcapsules coated with inner and outer phases. The thermoplastic tube (5) is installed at the outlet of the three-channel coaxial needle (4) and the cylindrical notch of the glass pipe (9) to ensure the sealing of the preparation.

6. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 5, characterized in that: The water flow guiding module comprises a water reservoir (6), a small water pump (7), a sleeve-type micro-regulating valve (8), a glass pipe (9), a third silicone tube (S3), and a fourth silicone tube (S4); the small water pump (7) is used to pump water out of the water reservoir; the sleeve-type micro-regulating valve (8) is used to control the speed of the pumped water flow; the third silicone tube (S3) is used to connect the small water pump (7) and the inlet of the sleeve-type micro-regulating valve (8); and the fourth silicone tube (S4) is used to connect the outlet of the sleeve-type micro-regulating valve (8) and the A end of the glass pipe (9).

7. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 6, characterized in that: The photocuring collection module comprises an ultraviolet lamp (10) and a mesh screen (11); the ultraviolet lamp (10) is used to cure the microcapsules in the glass pipe (9); and the mesh screen (11) is used to collect the cured microcapsules flowing out of the B end of the glass pipe (9).

8. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 6, characterized in that: The glass pipe (9) is 40-50 cm long and 0.5-1.5 cm in diameter. The glass pipe (9) comprises an A end and a B end. The A end of the glass pipe (9) is parallel to a horizontal plane. The angle between the B end of the glass pipe (9) and the horizontal plane is 140°-160°. A cylindrical notch with a diameter of 0.3-0.7 cm and a height of 1-3 cm is arranged on the glass pipe (9) at a distance of 8-12 cm from the A end of the glass pipe (9). The notch is connected to the outlet of the three-channel coaxial needle (4). The glass pipe (9) is used to assist in cutting the microcapsules flowing out of the outlet of the three-channel coaxial needle (4). The water flow in the pipe can guide the microcapsules to flow into the mesh screen (11).

9. The fire extinguishing microcapsule preparation system based on gravity drop according to claim 1, wherein the three-phase solution comprises: The perfluorohexanone solution forms the inner phase of the microcapsule, the photocurable solution forms the outer phase of the microcapsule, and the aqueous polyvinyl alcohol aqueous solution plays a role in cutting and shaping the microcapsule.

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