Heating and stirring device
By automatically adjusting the heating and rehydration flow of the precursor solution using electronically controlled valves and temperature sensors in the heating and stirring device, the problem of traditional devices waiting to reach the temperature is solved, and the continuous feeding of the precursor solution and the improvement of the production efficiency of the precursor solution is achieved.
Patent Information
- Application Number
- CN202323025713.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-09
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-11-09
AI Technical Summary
In the industrial production of nanofibers, traditional heating stirring devices need to wait for the specified temperature to be reached after pouring the precursor solution in one go, resulting in the failure to form seamless links when the productivity of the downstream electrospinning steps is greater than that of the upstream, delaying production efficiency.
A heating and stirring device is designed to realize the electrically controlled flow through the feed pipe and the electronically controlled valve. Combined with the temperature sensor and the control part, the heating and replenishment flow of the precursor solution is automatically adjusted to keep the solution within the specified temperature range to ensure continuous supply. Material to downstream.
The precursor solution reaches the specified temperature in a short time, avoids production gaps, improves production efficiency, and ensures seamless links between upstream and downstream steps.
Smart Images
Figure CN222219306U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of textile industry production equipment, and specifically relates to a heating and stirring device. Background Art
[0002] Nanofiber fabrics have extremely high specific surface area and very small fiber diameter, usually below 100 nanometers; this makes nanofibers have excellent air permeability and moisture permeability. Since the fiber diameter is very small, the pore size of nanofiber fabrics is also very small, which makes it possible to block most liquids and solid particles while allowing air and water vapor to pass through. This feature makes nanofiber fabrics can be used to make waterproof materials with good air permeability, such as raincoats, waterproof shoes, etc.
[0003] When using electrospinning technology to prepare nanofibers, a precursor solution is required; the precursor solution used to produce nanofibers is generally formed by mixing some organic solvents and organic solutes; before entering the electrospinning stage, the solute in the precursor solution needs to be fully dissolved in the solvent, and some precursor solutions also need to be heated to maintain a certain temperature and stir to prevent them from coagulating and solidifying.
[0004] The stirring device used in the actual industrial production of nanofibers usually pours the prepared precursor solution into the heating and stirring device at one time, and then stirs and heats it; after heating to the specified temperature range, it is provided to the downstream electrospinning step; the stirring, mixing and heating steps of the precursor are carried out in batches, but when the productivity of the downstream electrospinning step is greater than that of the upstream step, there will be a gap waiting situation in the downstream step, and a seamless production line cannot be formed, which delays production efficiency. Utility Model Content
[0005] The utility model provides a heating and stirring device, which is provided with a feed pipe and controlled by an electric control valve. A temperature monitoring sensor is provided in the device, and both the electric control valve and the temperature sensor are connected to a control unit for communication. When a precursor solution is stirred at a relatively hot temperature, it is not necessary to fill it all at once. It is only necessary to add a basic amount of precursor solution into the device, and then start stirring and heating to a specified temperature range. Since it is only a basic amount, the specified temperature range can be reached in a short time. After reaching the specified temperature range, it can start to be supplied to the downstream. At the same time, the feed pipe starts to continuously feed into the device, and monitors the temperature of the precursor solution in the device in real time. When the temperature is about to approach a maximum threshold, the control unit controls the electric control valve to increase the flow rate. When the temperature is about to approach a minimum threshold, the control unit controls the electric control valve to reduce the flow rate or even temporarily close it. In short, by controlling the flow rate of the replenishment, the temperature of the precursor is maintained within the specified temperature range. Since new material continues to enter, continuous supply to the downstream can be maintained, so that there will be no gaps in the production process. The utility model solves the problem that a heating and stirring device can only provide one batch of precursor solution at a time, there is a gap between each batch, and when the downstream productivity cannot be met, the production efficiency is delayed.
[0006] In order to achieve the above technical objectives, the utility model is implemented through the following technical solutions:
[0007] A heating and stirring device, comprising: a barrel, a stirring assembly, a heating element, a feeding pipe, a temperature sensor, a discharge pipe, and a control unit;
[0008] A stirring assembly is rotatably arranged inside the barrel body for stirring and mixing the precursor solution;
[0009] A heating element is arranged in the side wall of the barrel body, for providing heat energy into the barrel body to heat the precursor solution;
[0010] A temperature sensor is arranged on the bottom surface of the barrel body; a feed pipe is arranged on the upper end surface of the barrel body, and a discharge pipe is arranged on the lower end surface;
[0011] The temperature sensor and the feed pipe are both in communication connection with the control unit; the control unit is used to receive the temperature signal of the precursor solution and adjust the liquid inlet flow rate of the feed pipe.
[0012] Preferably, an electrically controlled flow valve is provided on the feed pipe, and the electrically controlled flow valve is communicatively connected with the control unit; the control unit adjusts the liquid inlet flow of the feed pipe by driving the electrically controlled flow valve.
[0013] Preferably, the control unit is integrated with a microprocessor; the electric control flow valve is connected to the I / O port of the microprocessor; and the control unit is provided with input buttons and a display screen.
[0014] Preferably, the side wall and the bottom of the barrel body are arranged as a hollow sandwich structure, and an electric heating plate as a heating element is arranged in the sandwich, and the electric heating plate is attached to a side close to the inside of the barrel body.
[0015] Preferably, a layer of heat insulating material is filled in the gap between the electric heating plate and a surface close to the outside of the barrel body.
[0016] Preferably, the stirring assembly includes a rotating shaft rod passing vertically through the center position of the upper end surface of the barrel body and a stirring blade arranged on the rotating shaft rod; the upper end of the rotating shaft rod is left outside the barrel body, and the lower end extends to the inside of the barrel body, and the stirring blade is arranged on the rotating shaft rod inside the barrel body; the upper end of the rotating shaft rod is connected to the rotor of the motor.
[0017] Preferably, an electric heating plate is arranged inside the stirring blade; a hollow channel is arranged inside the rotating shaft rod, and the electric heating plate wire is arranged through the hollow channel.
[0018] Preferably, the lower end of the rotating shaft rod extends all the way to the center of the lower bottom surface inside the barrel body, and a rotating shaft seat is provided at the center of the lower bottom surface, and the lower end of the rotating shaft rod is inserted into the rotating shaft seat.
[0019] Preferably, a discharge valve is provided on the discharge pipe.
[0020] Preferably, a window is provided on the side wall of the barrel body, and a transparent material is provided on the window.
[0021] The beneficial effects of the utility model are:
[0022] By utilizing the heating and stirring device provided by the utility model, after adding a sufficient basic amount of precursor solution in the early stage, stirring and heating can be carried out. After the stirring and mixing are uniform and heated to the specified temperature range, the material can be supplied to the downstream first; then new material is supplied to the barrel body and heating and stirring are continued. Based on temperature monitoring as a judgment basis, the feed flow rate is automatically adjusted to keep the precursor solution in the barrel body always within the specified temperature range; in this way, continuous supply to the downstream can be achieved without the need to heat and stir the material separately according to batches, thus filling the gap that may occur between the upstream and downstream due to poor productivity.
[0023] Electric heating plates are arranged inside the barrel interlayer and on the stirring blades, which can provide heat sources from both inside and outside, shorten the heating time, and avoid possible solidification of the precursor solution.
[0024] The rotating shaft rod of the stirring assembly extends to the bottom of the barrel and is connected to the rotating shaft seat; therefore, there is a stirring structure from the top to the bottom of the barrel, and when the amount of solution in the barrel is small, it can also be fully stirred. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] Figure 1 It is a schematic diagram of the external overall structure of the utility model;
[0027] Figure 2 It is a schematic diagram of the internal structure of the utility model;
[0028] Figure 3 This is a schematic diagram of the fan-shaped stirring blade structure in the embodiment of the utility model;
[0029] In the accompanying drawings, the structural names represented by the reference numerals are:
[0030] 1-barrel body, 101-window, 102-support foot, 2-feed pipe, 201-electrically controlled flow valve, 3-discharge pipe, 301-discharge valve, 4-motor, 5-rotating shaft rod, 501-rotating shaft seat, 6-stirring blade, 7-electric heating plate, 8-temperature sensor, 9-control unit. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] Example
[0033] See also Figure 2 As shown, a heating and stirring device includes a barrel 1, a feed pipe 2, an electric control flow valve 201, a control unit 9, a discharge pipe 3, a temperature sensor 8, an electric heating plate 7, a rotating shaft 5, and a stirring blade 6;
[0034] The side walls and bottom of the barrel body 1 are arranged as a hollow sandwich structure, and an electric heating plate 7 is arranged in the sandwich. The electric heating plate 7 is attached to a side close to the inside of the barrel body 1, which is conducive to the diffusion of heat into the barrel body 1; the gap between the electric heating plate 7 and the side close to the outside of the barrel body 1 is filled with a layer of heat insulation material to prevent heat loss in the barrel body and to prevent the outer wall of the barrel body from overheating and causing burns to the operator.
[0035] The rotating shaft rod 5 passes vertically through the center position of the upper end surface of the barrel body 1, and the upper end of the rotating shaft rod 5 is left outside the barrel body 1 and connected to the rotor of the motor 4; the lower end of the rotating shaft rod 5 extends into the barrel body 1; the rotating shaft rod 5 located in the barrel body 1 is provided with a stirring blade 6, and the stirring blade 6 is a spiral stirring blade 6, and an electric heating plate 7 is arranged inside the stirring blade 6. A hollow channel is opened inside the rotating shaft rod 5, and the electric heating plate 7 wire in the stirring blade 6 is arranged through the hollow channel. The electric heating plate 7 is arranged in the interlayer of the barrel body 1 and the stirring blade 6, so that the precursor solution can pass through the heat source from both the inside and outside directions at the same time, shortening the heating time.
[0036] like Figure 3 As shown, the above-mentioned spiral stirring blades can also be designed as fan-shaped blades or other blade structures with an expanded area. As long as it is convenient to arrange the electric heating plate 7 inside, the purpose of providing a heat source from the inside can be achieved; in the specific implementation, three fan-shaped stirring blades 6 are arranged on each stirring unit. According to the length of the rotating shaft rod 5 and the depth of the barrel body 1, the number of stirring units can be reasonably set on the rotating shaft rod 5.
[0037] like Figure 2 As shown, when the amount of solution in the barrel body 1 is small, the stirring blades may not be able to reach it and stirring cannot be achieved, so the lower end of the rotating shaft rod 5 is extended all the way to the center of the lower bottom surface inside the barrel body 1, and a rotating shaft seat 501 is set at the center of the lower bottom surface, and the lower end of the rotating shaft rod 5 is inserted into the rotating shaft seat 501; in this way, the barrel body 1 is covered with a stirring structure from the upper part to the lower part, and a small amount of solution can also be stirred.
[0038] A feed pipe 2 is arranged on the upper end surface of the barrel body 1 , and an electrically controlled flow valve 201 is arranged on the feed pipe 2 ; correspondingly, a discharge pipe 3 is arranged on the lower end surface of the barrel body 1 , and a discharge valve 301 is arranged on the discharge pipe 3 .
[0039] A temperature sensor 8 is provided on the bottom surface of the barrel 1; the temperature sensor 8 and the electric control flow valve 201 are connected to the I / O port of the microprocessor in the control unit 9, and the microprocessor can be a single chip microcomputer. Input buttons and a display screen are provided on the control unit 9. The appropriate precursor solution heating temperature range can be entered in advance through the input buttons and stored in the memory in the single chip microcomputer;
[0040] During production operation, the discharge pipe 3 is connected to the downstream electrospinning step, and the feed pipe 2 is connected to the precursor solution storage barrel, and can be pumped into the barrel body 1 by a negative pressure pump; firstly, a basic amount of precursor solution is pumped into the barrel body 1, and then stirring and heating to the set temperature range is started. Since it is only a basic amount, the specified temperature range can be reached in a short time. When the specified temperature range is reached, it can be supplied to the downstream; the discharge valve 301 of the discharge pipe 3 is adjusted to maintain a suitable feed flow rate;
[0041] At the same time as starting to feed the downstream, open the electronically controlled flow valve 201 to add material to the barrel 1; the temperature sensor 8 monitors the temperature value of the solution in the barrel 1 in real time. When the temperature is approaching the maximum threshold, the control unit 9 controls the electronically controlled flow valve 201 to increase the flow rate. When the temperature is approaching the minimum threshold, the control unit 9 controls the electronically controlled flow valve 201 to reduce the flow rate or even temporarily close it. In short, by controlling the flow rate of the replenishing liquid, the temperature of the precursor is maintained within the set temperature range. Since new material continues to enter and is continuously heated, and the single-chip microcomputer controls the electronically controlled flow valve 201 to adjust the feed flow rate, the solution volume and solution temperature can be kept balanced, and continuous feeding to the downstream can be achieved, so that there will be no gaps in the production process; production efficiency will not be delayed due to batch intervals.
[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0043] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A heating and stirring device, characterized in that: include: Barrel, stirring assembly, heating element, feed pipe, temperature sensor, discharge pipe, control unit; A stirring assembly is rotatably arranged inside the barrel body for stirring and mixing the precursor solution; A heating element is arranged in the side wall of the barrel body, for providing heat energy into the barrel body to heat the precursor solution; A temperature sensor is arranged on the bottom surface of the barrel body; a feed pipe is arranged on the upper end surface of the barrel body, and a discharge pipe is arranged on the lower end surface; The temperature sensor and the feed pipe are both in communication connection with the control unit; The control unit is used to receive the precursor solution temperature signal and adjust the liquid inlet flow rate of the feed pipe; The side wall and the bottom of the barrel body are provided with a hollow sandwich structure, an electric heating sheet as a heating element is provided in the sandwich, and the electric heating sheet is attached to a side close to the inside of the barrel body; The stirring assembly includes a rotating shaft rod vertically passing through the center position of the upper end surface of the barrel body and a stirring blade arranged on the rotating shaft rod; the upper end of the rotating shaft rod is left outside the barrel body, and the lower end extends to the inside of the barrel body, and the stirring blade is arranged on the rotating shaft rod inside the barrel body; the upper end of the rotating shaft rod is connected to the rotor of the motor; An electric heating plate is arranged inside the stirring blade; a hollow channel is arranged inside the rotating shaft rod, and the electric heating plate wire is arranged through the hollow channel; The lower end of the rotating shaft rod extends all the way to the center of the lower bottom surface inside the barrel body, a rotating shaft seat is arranged at the center of the lower bottom surface, and the lower end of the rotating shaft rod is inserted into the rotating shaft seat.
2. The heating and stirring device according to claim 1, characterized in that: An electrically controlled flow valve is arranged on the feed pipe, and the electrically controlled flow valve is communicatively connected with the control unit.
3. The heating and stirring device according to claim 2, characterized in that: The control part is integrated with a microprocessor; the electric control flow valve is connected to the I / O port of the microprocessor; and the control part is provided with input buttons and a display screen.
4. The heating and stirring device according to claim 1, characterized in that: A layer of heat insulating material is filled in the gap between the electric heating plate and a surface close to the outside of the barrel body.
5. The heating and stirring device according to claim 1, characterized in that: A discharge valve is arranged on the discharge pipe.
6. The heating and stirring device according to claim 1, characterized in that: A window is provided on the side wall of the barrel body, and a transparent material is arranged on the window.