A device for detecting the viscosity of a spinning solution

Abstract

The utility model discloses a detection device of spinning solution viscosity. The detection device includes: the top of water tank is equipped with at least two drop -off mouths, at least two viscosity tubes, every viscosity tube is used to hold the spinning solution sample of detection, at least two supports, every support is located in the water tank, is used for placing the viscosity tube from the drop -off mouth of corresponding drop -off mouth to the water tank, through being equipped with at least two supports in the water tank, can realize the synchronous detection of supporting one detection personnel two groups or more groups spinning solution detection sample, and parallel sample detection, has shortened the detection time, has improved the detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of carbon fiber precursor production technology, specifically, it relates to a device for detecting the viscosity of spinning solution. Background Technology

[0002] Carbon fiber precursor is the precursor material for producing carbon fiber. Specifically, in the wet process of carbon fiber precursor production, solid polymer powder is mixed with an organic solvent to form a spinning solution, such as DMAC solvent or DMSO solvent. The spinning solution is delivered to the spinneret by a metering pump, and the spinneret sprays out a fine stream of spinning solution. The solution is formed in a coagulation bath and then undergoes steps such as washing, stretching, oiling, drying, and winding to form the carbon fiber precursor product. In the dry process of carbon fiber precursor production, the fine stream of spinning solution comes into contact with a hot air stream, the solvent evaporates, and filaments are formed. After the filaments are formed, they are then drawn together by a bundling roller to obtain carbon fiber precursor. Regardless of whether it is a dry or wet process, the long-term continuous and stable spinnability of carbon fiber precursor requires stable process window conditions. Among them, the stability of the spinning solution is an important indicator. Therefore, its stability must be strictly controlled in actual production. The fluidity of the spinning solution can be determined by detecting its viscosity, and then the stability of the spinning solution can be determined to measure the spinnability of carbon fiber precursor.

[0003] Existing technologies disclose devices for determining the viscosity of spinning solution by measuring the time it takes for a ball to fall into a viscosity tube containing the spinning solution. However, such devices are only applicable to the detection of one set of spinning solutions, which leads to longer detection time and reduced efficiency.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for detecting the viscosity of spinning solution. By setting at least two supports in the water tank, it can support one tester to conduct simultaneous testing of two or more sets of spinning solution test samples, as well as parallel sample testing, thereby shortening the testing time and improving the testing efficiency.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a device for detecting the viscosity of spinning solution, comprising:

[0008] A water tank with at least two inlets on its top;

[0009] At least two viscosity tubes, each used to hold the spinning solution to be tested;

[0010] At least two supports, each located inside the water tank, are used to hold the viscosity tube that is placed into the water tank from the corresponding dispensing port.

[0011] Furthermore, each bracket is equipped with a support portion located below the dispensing port;

[0012] The bottom support of the viscosity tube abuts against the support part.

[0013] Furthermore, the bracket between the support and the dispensing port is provided with several positioning parts;

[0014] Several positioning parts are distributed along the vertical direction;

[0015] After being positioned by several positioning parts, the viscosity tube is supported and abutted against the support part.

[0016] Furthermore, the support and several positioning parts are connected by several auxiliary support parts distributed at intervals along the circumference.

[0017] Furthermore, the support structure is plate-like;

[0018] The bracket between the support and the inlet is provided with several plate-shaped connecting parts.

[0019] Several connecting parts are distributed along the vertical direction;

[0020] The positioning part is located on the connecting part;

[0021] The auxiliary support section is a rod-shaped structure;

[0022] The auxiliary support extends from the bottom of the water tank to the top, passing through the support section and several connecting sections in sequence.

[0023] Furthermore, the positioning parts include first-type positioning parts and second-type positioning parts;

[0024] The support and the two connecting parts are connected together by two auxiliary support parts that are set opposite to each other;

[0025] The top of the support part has an upward-facing positioning groove, which serves as the first type of positioning part.

[0026] The positioning through hole provided on the connecting part serves as a second type of positioning part;

[0027] The bottom end of the viscosity tube is inserted into the positioning groove after passing through two positioning through holes in sequence.

[0028] Furthermore, the support is equipped with a position detection device, which includes two position sensors;

[0029] A position sensor is located on the upper connecting part;

[0030] Another position sensor is located on the lower connection part.

[0031] Furthermore, the auxiliary support extends upwards to the outside of the water tank;

[0032] A frame is located on top of the auxiliary support unit outside the water tank;

[0033] The bracket is equipped with an indicator light to show whether the test has started.

[0034] Furthermore, a temperature control module is installed on one side of the water tank;

[0035] The temperature control module includes a temperature controller and a heater;

[0036] The heater is placed side by side with the water tank;

[0037] The temperature controller is located above the heater and is used to control the temperature of the heater.

[0038] Furthermore, the bottom of the sink is equipped with a horizontally extending water pipe;

[0039] One end of the water pipe has an inlet that is connected to the heater, and the periphery of the water pipe has several outlets that are distributed along the extension direction of the water pipe and are connected to the water tank.

[0040] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0041] By installing at least two supports inside the water tank, it is possible to support one inspector to simultaneously test two or more sets of spinning solution samples, as well as parallel sample testing, thereby shortening the testing time and improving testing efficiency.

[0042] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0043] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a spinning solution viscosity detection device provided in one embodiment of the present invention.

[0045] Icons: 1-Water tank; 11-Cover plate; 12-Light source strip; 13-Handle; 2-Viscosity tube; 21-Sealing cap; 3-Bracket; 31-Support part; 32-Upper connecting part; 321-Upper positioning part; 321a-Upper positioning through hole; 33-Lower connecting part; 331-Lower positioning part; 331a-Lower positioning through hole; 34-Auxiliary support part; 4-Position detection device; 41-Upper position sensor; 42-Lower position sensor; 5-Frame; 51-Running indicator light; 7-Temperature control module; 71-Temperature controller; 72-Heater; 73-Water pipe.

[0046] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0048] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] like Figure 1 As shown, this utility model provides a device for detecting the viscosity of spinning solution, comprising:

[0051] Water tank 1, with at least two inlets on its top;

[0052] At least two viscosity tubes 2, each viscosity tube 2 is used to hold the spinning solution to be tested;

[0053] At least two supports 3, each support 3 is located in the water tank 1, for placing the viscosity tube 2 into the water tank 1 from the corresponding inlet.

[0054] In the embodiments of this utility model, by providing at least two supports 3 in the water tank 1, it is possible to support one inspector to conduct simultaneous testing of two or more sets of spinning solution test samples, as well as parallel sample testing, thereby shortening the testing time and improving the testing efficiency.

[0055] Each viscosity tube 2 and support 3 constitutes an independent testing module, supporting simultaneous testing of multiple samples. The water tank 1 provides a stable temperature field, eliminating temperature interference with viscosity measurement. The inlet of the water tank 1 corresponds one-to-one with the support 3, allowing the measuring ball to be accurately placed into the spinning solution of the viscosity tube 2, reducing human error. The measuring ball is a steel ball.

[0056] The bottom of the bracket 3 is supported on the bottom of the water tank 1. It can be fixed to the bottom of the water tank 1 by means of screwing, welding or other methods. Of course, in order to make it easy to remove the bracket 3 from the water tank 1, the bracket 3 can be placed directly on the bottom of the water tank 1. All brackets 3 can be connected together or set separately.

[0057] The top of the viscosity tube 2 is provided with an opening, and the bottom of the viscosity tube 2 is supported on the bracket 3. The opening of the viscosity tube 2 is provided with a sealing cap 21, which is a downward recessed groove. The bottom of the groove of the sealing cap 21 is provided with an insertion opening that communicates with the inside of the viscosity tube 2. The detection ball enters the viscosity tube 2 through the insertion opening for viscosity detection. The sealing cap 21 of the groove device is used to guide the detection ball into the viscosity tube 2. The density of the detection ball is greater than the density of the spinning solution.

[0058] All inlets are located inside the water tank 1. The top of the water tank 1, at a certain distance from all inlets, is equipped with an open and closable cover 11 to prevent heat loss from the water tank 1. The spinning solution can be carbon fiber spinning solution, acetate spinning solution, etc., enabling the detection device of this application to be compatible with various spinning solutions.

[0059] Specifically, the water tank 1 is equipped with six sets of supports 3, such as Figure 1 As shown, six sets of brackets 3 are arranged side by side along the left-right direction. In addition, a light strip 12 is provided on the top of the water tank 1 for lighting.

[0060] In the embodiments of this utility model, each bracket 3 is provided with a support portion 31 located below the delivery port;

[0061] The bottom support of the viscosity tube 2 abuts against the support part 31.

[0062] In this embodiment of the invention, specifically, the support part 31 is located directly below the dispensing port to ensure that the viscosity tube 2 falls accurately into the preset position when it is inserted from the dispensing port, avoiding manual placement deviation. Through the bottom abutment design, the weight of the viscosity tube 2 is evenly distributed to the support 3, reducing the risk of tipping due to vibration or water flow impact. The support part 31 can be a plate-like structure, a groove-like structure, etc.

[0063] Furthermore, the bracket 3 between the support part 31 and the delivery port is provided with several positioning parts;

[0064] Several positioning parts are distributed along the vertical direction;

[0065] After being positioned by several positioning parts, the viscosity tube 2 is supported and abuts against the support part 31.

[0066] The viscosity tube 2 is positioned progressively by vertically distributed positioning sections, reducing the error of single insertion. Multi-level positioning forms a mechanical limit, preventing the viscosity tube 2 from tipping over due to liquid surface fluctuations or external impacts during testing. Positioning sections of different heights are compatible with viscosity tubes 2 of different lengths, improving the versatility of the device; the positioning sections can be through-hole positioning structures, clamp positioning structures, etc.

[0067] Furthermore, the support portion 31 and several positioning portions are connected by several auxiliary support portions 34 distributed at intervals along the circumference.

[0068] The auxiliary support parts 34, which are distributed circumferentially, form a triangular or quadrilateral mechanically stable structure, thereby improving the overall torsional stiffness of the support 3 and transferring the weight of the viscosity tube 2 and the spinning solution to the main body of the support 3 through multiple points, thus avoiding local stress concentration.

[0069] Specifically, the support part 31 is a plate-like structure;

[0070] The bracket 3 between the support part 31 and the injection port is provided with several plate-shaped connecting parts;

[0071] Several connecting parts are distributed along the vertical direction;

[0072] The positioning part is located on the connecting part;

[0073] The auxiliary support part 34 is a rod-shaped structure;

[0074] The auxiliary support 34 extends from the bottom to the top of the water tank 1, and passes through the support 31 and several connecting parts in sequence.

[0075] Specifically, the support part 31 is arranged parallel to the connecting part to ensure that the viscosity tube 2 can accurately reach the support part 31 through the positioning part on the connecting plate and abut against the support part 31.

[0076] The auxiliary support part 34 is a rod-shaped structure that can reduce the weight of the support 3. The auxiliary support part 34 extends from the bottom to the top of the water tank 1, increasing the length of the auxiliary support part 34, which can realize the support of the bottom of the water tank 1 to the support 3 and improve the overall stability of the support 3.

[0077] Furthermore, the positioning parts include first-type positioning parts and second-type positioning parts;

[0078] The support part 31 and the two connecting parts are connected together by two auxiliary support parts 34 that are arranged opposite to each other;

[0079] The top of the support part 31 has an upward-facing positioning groove as a first type of positioning part;

[0080] The positioning through hole provided on the connecting part serves as a second type of positioning part;

[0081] The bottom end of the viscosity tube 2 is inserted into the positioning groove after passing through two positioning through holes in sequence.

[0082] By using positioning grooves and positioning through holes to position the viscosity tube 2 in multiple stages, the shaking of the viscosity tube 2 can be reduced, and the efficiency of placing the viscosity tube 2 on the support 3 can be improved.

[0083] like Figure 1 As shown, the two connecting parts include an upper connecting part 32 and a lower connecting part 33, and the two auxiliary support parts 34 are arranged opposite each other in the left and right direction. The connecting part between the two auxiliary support parts 34 is provided with a positioning through hole.

[0084] The upper connecting part 32 is provided with an upper positioning through hole 321a, which serves as the upper positioning part 321; the lower connecting part 33 is provided with a lower positioning through hole 331a, which serves as the lower positioning part 331. When the viscosity tube 2 is placed on the support 3, the bottom end of the viscosity tube 2 passes through the upper positioning through hole 321a and the lower positioning through hole 331a from top to bottom and is then inserted into the positioning groove; the upper connecting part 32 and the lower connecting part 33 can be composed of multilayer boards.

[0085] Specifically, the auxiliary support part 34 with the rod-like structure can be a single rod or composed of multiple segmented rods. When the auxiliary support part 34 is a single rod or composed of multiple segmented rods, the auxiliary support part 34, the connecting part, and the support part 31 are integrally formed. Alternatively, the auxiliary support part 34 can be detachably connected to the connecting part and the support part 31. Different assembly methods can be adopted as needed.

[0086] The auxiliary support 34 extends upward to the outside of the water tank 1;

[0087] A frame 5 is located on top of the auxiliary support 34 outside the water tank 1. The frame 5 is equipped with a running indicator light 51 to indicate whether the detection has started. Specifically, the measuring ball begins to fall from the opening of the viscosity tube 2 after the running indicator light 51 turns green, thus improving the reliability of the detection.

[0088] The auxiliary support part 34 not only connects the connecting part and the support part 31, but also supports and fixes the frame 5, thus increasing the scope of use of the auxiliary support part 34.

[0089] Furthermore, the bracket 3 is equipped with a position detection device 4, which includes two position sensors;

[0090] A position sensor is located on the upper connecting part;

[0091] Another position sensor is located on the lower connection part.

[0092] Specifically, one position sensor, as the upper position sensor 41, is disposed on the upper connecting part 32, and the other position sensor, as the lower position sensor 42, is disposed on the lower connecting part 33. The detection device of this application also includes a timer and a controller, and the timer and the two position sensors are respectively connected to the controller; the timer and the controller can be disposed on the frame 5.

[0093] Timing begins when the measuring ball moves from the opening of the viscosity tube 2 to the upper position sensor 41 and stops when the measuring ball moves to the lower position sensor 42. The controller calculates the time through the program and calculates the viscosity by the time the measuring ball moves between the upper position sensor 41 and the lower position sensor 42. Under the same displacement, the longer the measuring ball falls, the higher the viscosity of the spinning solution, the smaller the flow fluctuation, and the stronger the stability. If the flow fluctuation is large, it indicates that the stability of the liquid solid content is poor (i.e., uneven mixing), which in turn affects the spinnability of the carbon fiber precursor, making the carbon fiber precursor prone to breakage or fuzz, and ultimately affecting the quality of the carbon fiber product.

[0094] In this embodiment of the present invention, a temperature control module 7 is provided on one side of the water tank 1;

[0095] Temperature control module 7 includes a temperature controller 71 and a heater 72;

[0096] The heater 72 is arranged side by side with the water tank 1;

[0097] The temperature controller 71 is located above the heater 72 and is used to control the temperature of the heater 72.

[0098] In this embodiment of the present invention, the water in the water tank 1 is heated to the temperature set by the controller by the heater 72, and the heating is stopped after the temperature is reached. The temperature controller 71 controls the water to maintain the temperature.

[0099] Furthermore, a horizontally extending water pipe 73 is provided at the bottom of the water tank 1;

[0100] One end of the water pipe 73 has an inlet that is connected to the heater 72. The peripheral wall of the water pipe 73 is provided with several outlets that are distributed along the extension direction of the water pipe 73 and are connected to the water tank 1. The outlets correspond one-to-one with the positions of the support 3.

[0101] The arrangement of multiple outlets can eliminate temperature gradients, prevent inconsistent spinning solution temperatures in different locations of the viscosity tube 2, and improve detection accuracy.

[0102] The water in the water tank 1 can be recycled. The water in the water tank 1 is cooled by the refrigeration device and then enters the heater 72 for heating and reuse.

[0103] The process of detecting the viscosity of the spinning solution in this invention is as follows:

[0104] The water heater 72 heats the water in the water tank 1 to the temperature set by the water heating controller. Once the temperature is reached, the heating stops, and the temperature controller 71 controls the water to maintain that temperature. For example, the heating stops when the temperature in the water tank 1 reaches 50°C.

[0105] Open the cover 11 of the water tank 1; after pouring the spinning solution into the viscosity tube 2, place the viscosity tube 2 on the bracket 3 inside the water tank 1, and cover the opening of the viscosity tube 2 with the sealing cap 21, and start the countdown;

[0106] The ball begins to fall after the countdown ends and the running indicator light 51 turns green.

[0107] Timing begins when the measuring ball moves from the opening of the viscosity tube 2 to the upper position sensor 41, and stops when the measuring ball moves to the lower position sensor 42. The controller calculates the time through the program, and calculates the viscosity by the time the measuring ball moves between the upper position sensor and the lower position sensor 42. In order to reduce errors, the measuring ball is placed in a heated water tank 1 before dropping, and the temperature-adjusted ball is taken out of the water tank 1, dried, and then placed into the viscosity tube 2.

[0108] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for detecting the viscosity of spinning solution, characterized in that, include: A water tank with at least two inlets on its top; At least two viscosity tubes, each used to hold the spinning solution to be tested; At least two supports, each located inside the water tank, are used to hold the viscosity tube that is placed into the water tank from the corresponding dispensing port.

2. The detection device according to claim 1, characterized in that, Each bracket is equipped with a support section located below the dispensing port; The bottom support of the viscosity tube abuts against the support part.

3. The detection device according to claim 2, characterized in that, Several positioning parts are provided on the bracket between the support and the delivery port; Several positioning parts are distributed along the vertical direction; After being positioned by several positioning parts, the viscosity tube is supported and abutted against the support part.

4. The detection device according to claim 3, characterized in that, The support part and several positioning parts are connected by several auxiliary support parts distributed at intervals along the circumference.

5. The detection device according to claim 4, characterized in that, The support section is a plate-like structure; The bracket between the support and the inlet is provided with several plate-shaped connecting parts. Several connecting parts are distributed along the vertical direction; The positioning part is located on the connecting part; The auxiliary support section is a rod-shaped structure; The auxiliary support extends from the bottom of the water tank to the top, passing through the support section and several connecting sections in sequence.

6. The detection device according to claim 5, characterized in that, The positioning components include type I positioning components and type II positioning components; The support and the two connecting parts are connected together by two auxiliary support parts that are set opposite to each other; The top of the support part has an upward-facing positioning groove, which serves as the first type of positioning part. The positioning through hole provided on the connecting part serves as a second type of positioning part; The bottom end of the viscosity tube is inserted into the positioning groove after passing through two positioning through holes in sequence.

7. The detection device according to claim 6, characterized in that, The bracket is equipped with a position detection device, which includes two position sensors; A position sensor is located on the upper connecting part; Another position sensor is located on the lower connection part.

8. The detection device according to claim 6, characterized in that, The auxiliary support extends upwards to the outside of the water tank; A frame is located on top of the auxiliary support unit outside the water tank; The bracket is equipped with an indicator light to show whether the test has started.

9. The detection device according to any one of claims 1-8, characterized in that, A temperature control module is installed on one side of the water tank; The temperature control module includes a temperature controller and a heater; The heater is placed side by side with the water tank; The temperature controller is located above the heater and is used to control the temperature of the heater.

10. The detection device according to claim 9, characterized in that, The bottom of the sink is equipped with a horizontally extending water pipe; One end of the water pipe has an inlet that connects to the heater, and the perimeter of the water pipe has several outlets that are distributed along the extension direction of the water pipe and connect to the water tank. The outlets correspond one-to-one with the positions of the support.

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