Viscosity detection timing device for polyacrylonitrile solution

Abstract

A provided polyacrylonitrile solution viscosity detection timing device comprises a device main body, a first side surface of the device main body is provided with an upper inductive switch and a lower inductive switch which are arranged at an interval along the height direction of the device main body, and the upper inductive switch and the lower inductive switch are respectively used for automatic inductive detection of a to-be-detected object passing through an inductive area of the upper inductive switch and the lower inductive switch; a display module is further arranged on the second side face of the device body and used for displaying the time difference when the same to-be-detected object passes through the upper inductive switch and the lower inductive switch, a connecting and fixing structure is further arranged on the first side face, and the device body is fixedly connected with the viscosity detection device through the connecting and fixing structure. The first side face and the second side face are oppositely arranged. According to the method, a manual timing mode in the prior art does not need to be adopted, time and labor are saved, the phenomenon that a viscosity detection result is inaccurate due to timing errors existing in manual timing is avoided, and the detection efficiency and the detection accuracy of the viscosity of the polyacrylonitrile solution are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of viscosity detection of polyacrylonitrile solution, and in particular relates to a viscosity detection timing device for polyacrylonitrile solution. Background Art

[0002] Polyacrylonitrile-based carbon fiber has excellent mechanical properties and chemical stability and is widely used in aerospace, transportation, sports and leisure and other fields. As the primary link in the preparation of carbon fiber, the characteristics of polyacrylonitrile solution directly affect the performance of process products and carbon fiber products. Therefore, the application and development of efficient and accurate detection technology is crucial.

[0003] Falling ball viscosity and intrinsic viscosity are different manifestations of the viscosity properties of polyacrylonitrile solution. Both reflect the size of the polymer molecular chain and molecular weight. The control status of the polymerization process can be judged based on the falling ball viscosity and intrinsic viscosity values. The falling ball viscosity of the polyacrylonitrile solution is obtained by using the movement time of the ball, which is proportional to the time it takes for the ball to fall a certain distance in the polyacrylonitrile solution. It is a macroscopic statistical method. The detection process usually uses manual timing. The polyacrylonitrile solution is poured into a measuring cylinder. The middle section of the outer wall of the measuring cylinder is calibrated with an upper and lower scale line with a distance of 100 mm. When the ball is observed to pass through the two scale lines with the naked eye, the operator immediately presses the stopwatch to start the time, and the falling ball viscosity of the polyacrylonitrile solution is calculated by the time it takes the ball to move this distance; the intrinsic viscosity of the polyacrylonitrile solution is determined by using an Ubbelohde viscometer to measure the outflow time of the solvent and a certain concentration of polyacrylonitrile solution, thereby obtaining the intrinsic viscosity of the polymer solution. The detection process also uses manual timing. A solution of a certain concentration is injected into the Ubbelohde viscometer. There are upper and lower scale lines on the Ubbelohde viscometer. When the solution is observed to pass through the two scale lines with the naked eye, the operator immediately presses the stopwatch to start the time, and the intrinsic viscosity of the polyacrylonitrile solution is calculated by the time it takes the solution to move this distance. Obviously, time directly affects the accuracy of the falling ball viscosity and intrinsic viscosity of the polyacrylonitrile solution. The current detection process requires manual timing, which is highly dependent on manual labor, time-consuming and labor-intensive, inefficient, prone to errors, and not conducive to quickly obtaining test results. Summary of the invention

[0004] Therefore, the present invention provides a viscosity detection and timing device for polyacrylonitrile solution, which can solve the technical problems in the prior art that the viscosity detection and timing of polyacrylonitrile solution is manually performed, which is time-consuming and labor-intensive, inefficient, and the detection results are greatly affected by human factors and have large errors.

[0005] In order to solve the above problems, the present invention provides a viscosity detection timing device for polyacrylonitrile solution, comprising a device body, an upper sensing switch and a lower sensing switch arranged at intervals along the height direction are provided on the first side of the device body, the upper sensing switch and the lower sensing switch are respectively used for automatic sensing detection of an object to be detected passing through the sensing area thereof, a display module is further provided on the second side of the device body, the display module is used to display the time difference of the same object to be detected passing through the upper sensing switch and the lower sensing switch, a connecting and fixing structure is further provided on the first side, the device body is fixedly connected to the viscosity detection device through the connecting and fixing structure, and the first side and the second side are arranged opposite to each other.

[0006] In some embodiments, the connecting and fixing structure includes an upper connecting component and a lower connecting component, and the upper connecting component, the lower connecting component and the first side surface can be slidably connected to adjust the distance between the two in the height direction; and / or, when the object to be measured is a metal ball, the upper sensing switch and the lower sensing switch adopt one of an infrared sensing switch and an electromagnetic induction switch, and when the object to be measured is a polyacrylonitrile solution, the upper sensing switch and the lower sensing switch adopt a capacitive sensing switch.

[0007] In some embodiments, the upper connecting component and the lower connecting component both include a slider, and a reduction groove is constructed on the first side and passes through the upper and lower end surfaces of the device body along the height direction, and the slider is embedded in the reduction groove. Scale marks arranged along the height direction are also formed on the first side, and alignment marks are constructed on the outer surface of the slider.

[0008] In some embodiments, the upper sensing switch is detachably connected to the upper connecting component, and the lower sensing switch is detachably connected to the lower connecting component.

[0009] In some embodiments, a camera component is further disposed on the first side surface, and the camera component is used to record the falling or flowing state of the object to be tested in the viscosity detection device in real time.

[0010] In some embodiments, a lighting component is further provided on the first side surface; and / or the camera component includes a first camera, and the first camera is located between the upper sensing switch and the lower sensing switch.

[0011] In some embodiments, a ball throwing mechanism is provided on the upper end surface of the device body, and the ball throwing mechanism has a receiving groove for receiving metal balls, and the metal balls received in the receiving groove can fall into the viscosity detection device through the material input port of the viscosity detection device.

[0012] In some embodiments, the ball throwing mechanism includes a fixed disk, a rotating disk, and a rotary motor for driving the rotating disk to rotate around its central axis. The rotating disk is provided with a plurality of the receiving grooves, and each of the receiving grooves is arranged in sequence along the circumferential direction of the rotating disk. The fixed disk has a ball throwing port, and the ball throwing port is arranged correspondingly to the material input port above and below, and the bottom wall of each of the receiving grooves is an open structure, and the rotary motor is fixedly connected to the bottom end surface of the fixed disk.

[0013] In some embodiments, the pitching mechanism is detachably connected to the device body via the fixed disk; and / or, a plurality of the receiving grooves are arranged from the inside to the outside in the same diameter direction of the rotating disk.

[0014] In some embodiments, a power module is integrated in the device body, and the power module is used to supply power to the upper sensing switch, the lower sensing switch, the display module, and the rotary motor.

[0015] The viscosity detection and timing device for polyacrylonitrile solution provided by the present invention has the following beneficial effects:

[0016] The viscosity detection timing device of the polyacrylonitrile solution has an upper sensing switch and a lower sensing switch which can automatically sense the object to be detected, thereby realizing accurate detection of the motion time difference of the object to be detected, without the need to adopt the manual timing method in the prior art, saving time and labor, and eliminating the inaccurate viscosity detection result caused by the timing error existing in the manual timing, thereby improving the detection efficiency and detection accuracy of the viscosity of the polyacrylonitrile solution; at the same time, the timing device forms a quick connection and positioning with the viscosity detection device through the connection fixing structure, which can also further improve the detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a viscosity detection and timing device for a polyacrylonitrile solution according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A front view of

[0020] Figure 3 yes Figure 1 Left view of;

[0021] Figure 4 yes Figure 1 A top view of

[0022] Figure 5 yes Figure 1 Rear view of

[0023] Figure 6 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention;

[0024] Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure of the pitching mechanism.

[0025] Figure 8 yes Figure 7 A schematic diagram of a top view of the structure in which the rotating disk and the fixed disk are assembled (one ball is thrown once every single ball);

[0026] Fig. 9 yes Figure 7 Another top view structural schematic diagram of the rotating disk and the fixed disk in the assembled state (multiple balls are thrown synchronously for parallel sample testing).

[0027] The accompanying drawings are marked as follows:

[0028] 1. Device body; 11. Narrowing slide groove; 12. Scale mark; 21. Upper induction switch; 22. Lower induction switch; 3. Display module; 41. Upper connecting component; 42. Lower connecting component; 43. Slider; 431. Alignment mark; 44. Connecting column; 45. Connecting head; 50. Illuminating component; 51. First camera; 52. Second camera; 53. Third camera; 6. Pitching mechanism; 61. Receiving groove; 62. Fixed disk; 621. Pitching port; 63. Rotating disk; 631. Radial partition plate; 632. Circumferential partition plate; 64. Rotating motor; 65. Connecting rod; 71. Power module; 73. Charging port; 74. Copy data interface; 75. Detection start switch; 76. Illuminating switch; 77. Device power switch. DETAILED DESCRIPTION

[0029] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] See also Figure 1 and Fig. 9As shown, according to an embodiment of the present invention, a viscosity detection and timing device for polyacrylonitrile solution is provided, which is used in conjunction with a corresponding viscosity detection device when detecting the falling ball viscosity or the intrinsic viscosity of the polyacrylonitrile solution, so as to automatically and accurately obtain the motion time difference of the object to be detected. The viscosity detection and timing device for the polyacrylonitrile solution includes a device body 1, which serves as a mounting carrier for various functional components. An upper sensing switch 21 and a lower sensing switch 22 arranged at intervals along the height direction of the device body 1 are provided on a first side surface (i.e., the back surface when in use, i.e., the side close to the viscosity detection device) of the device body 1. The upper sensing switch 21 and the lower sensing switch 22 are respectively used for automatic sensing detection of the object to be detected passing through their sensing areas. A display module 3 is also provided on a second side surface (i.e., the front surface when in use, i.e., the side facing the operator) of the device body 1. The display module 3 is used to display the time difference of the same object to be measured passing through the upper sensing switch 21 and the lower sensing switch 22. A connecting and fixing structure (not marked in the figure) is also provided on the first side. The device body 1 is fixedly connected to the viscosity detection device (not shown in the figure) through the connecting and fixing structure. The first side and the second side are arranged opposite to each other. It can be understood that the display module 3 is integrated with a display screen and a control component (such as a controller) electrically connected to the display screen (including a communication connection). The time difference is obtained by the corresponding chip calculation in the control component. This technical means is a conventional technical means in the field of electricity, and the present invention does not intend to protect it. That is, the relevant calculation chip in the prior art is used to receive the detection signals of the upper sensing switch 21 and the lower sensing switch 22 respectively and perform a simple difference operation. Specifically, the aforementioned viscosity detection device can be determined according to the specific viscosity detection project. For example, when the viscosity detection project is a falling ball viscosity detection project, the viscosity detection device can specifically select a measuring cylinder that meets the relevant technical requirements, and when the viscosity detection project is a characteristic viscosity detection project, the viscosity detection device can specifically select an Ubbelohde viscometer that meets the relevant technical requirements.

[0034] In the technical scheme, the viscosity detection timing device of the polyacrylonitrile solution has a device body 1 on which an upper sensing switch 21 and a lower sensing switch 22 capable of automatically sensing the object to be measured are provided, thereby realizing accurate detection of the motion time difference of the object to be measured, without the need to adopt the manual timing method in the prior art, saving time and effort, and eliminating the occurrence of inaccurate viscosity detection results caused by timing errors in manual timing, thereby improving the detection efficiency and detection accuracy of the viscosity of the polyacrylonitrile solution; at the same time, the timing device forms a quick connection and positioning with the viscosity detection device by connecting the fixed structure, which can also further improve the detection efficiency and detection accuracy.

[0035] The specific sensing principle and structural form of the upper sensing switch 21 and the lower sensing switch 22 can be reasonably selected according to the detection requirements and the type of the object to be detected. Specifically, when the falling ball viscosity of the polyacrylonitrile solution is detected, the object to be detected is a metal ball. Correspondingly, the upper sensing switch 21 and the lower sensing switch 22 can be infrared sensing switches, electromagnetic sensing switches, etc.; when the characteristic viscosity of the polyacrylonitrile solution is detected, the object to be detected is a polyacrylonitrile solution. At this time, the upper sensing switch 21 and the lower sensing switch 22 use capacitive sensing switches to achieve non-contact detection of the metal ball and the polyacrylonitrile solution. It should be noted that, in principle, any sensing switch that can achieve reliable and accurate detection of the object to be detected in different detection items can be selected and applied, but non-contact sensing switches should be used as much as possible to avoid the large deviation in the viscosity detection result caused by the obstruction of the contact sensing switch to the solution.

[0036] As a preferred embodiment, the connecting and fixing structure includes an upper connecting component 41 and a lower connecting component 42, and the upper connecting component 41 and the lower connecting component 42 can be slidably connected to the first side surface to adjust the distance between the two in the height direction, that is, when the distance between the two needs to be adjusted, at least one of the upper connecting component 41 and the lower connecting component 42 can be slidably adjusted along the height direction of the first side surface, and after the distance between the two is determined, their position should be locked by a corresponding locking member (such as a tightening bolt).

[0037] In this technical solution, the connecting and fixing structure includes an upper connecting component 41 and a lower connecting component 42 which are spaced apart from each other, and the distance between the two can be adjusted. In this way, the distance between the two can be flexibly adjusted according to different detection items and the size of the viscosity detection device. On the premise of ensuring that the length of the detection interval meets the technical requirements, the connection between the viscosity detection timing device and the viscosity detection device is reliable and stable (the two-point connection is more stable).

[0038] In a specific embodiment, specifically refer to Figure 2 and Figure 4As shown, the upper connecting component 41 and the lower connecting component 42 both include a slider 43, and a shrinking groove 11 (such as a dovetail groove) is constructed on the first side surface, which runs through the upper and lower end surfaces of the device body 1 along the height direction. The slider 43 is embedded in the shrinking groove 11. At this time, the cross section of the slider 43 should match the cross section of the shrinking groove 11 to ensure that the two slide together and prevent the slider 43 from escaping from the notch of the shrinking groove 11. The first side surface is also formed with scale marks 12 arranged along the height direction, and the outer surface of the slider 43 is constructed with a positioning mark 431. The aforementioned scale mark 12 can be, for example, a plurality of scale lines integrally formed on the first side surface of the device body 1, or a ruler with scale lines, in which case the ruler can be assembled on the first side surface. The aforementioned positioning mark 431 can specifically be a straight line assembled on the exposed surface of the slider 43, and it is more preferred that the straight line is directly integrally formed on the exposed surface of the slider 43. The aforementioned scale mark 12 should be arranged at one side edge of the notch of the shrinking chute 11 .

[0039] In this technical solution, by setting an alignment mark 431 on the exposed surface of the slider 43 and setting a scale mark 12 on the first side, the distance between the upper connecting component 41 and the lower connecting component 42 can be accurately determined.

[0040] Before specific testing, after assembling all functional components on the device body 1, adjust the spacing between the upper connecting component 41 and the lower connecting component 42 to the required spacing, and then fix the upper connecting component 41 and the lower connecting component 42 to the viscosity testing device.

[0041] As a preferred embodiment, the upper sensing switch 21 is detachably connected to the upper connecting component 41, and the lower sensing switch 22 is detachably connected to the lower connecting component 42. Specifically, for example, the sensing switch is connected to the corresponding connecting component in a threaded manner. Of course, a snap-on manner can also be used to achieve a detachable connection between the two.

[0042] In this technical solution, the sensing switch is directly connected to the corresponding connecting component. Since the position of the connecting component is adjustable, the sensing switch can be adjusted synchronously while adjusting the distance between the upper connecting component 41 and the lower connecting component 42, thereby ensuring that the distance between the upper and lower sensing switches is within the movement displacement range required for the viscosity detection project. At the same time, since the connection between the sensing switch and the connecting component is detachable, the corresponding sensing switch type can be replaced according to different objects to be tested, which is very convenient.

[0043] See Figure 4As shown, the upper connecting component 41 and the lower connecting component 42 can adopt the same structure. As mentioned above, both of them include a slider 43. Taking the upper connecting component 41 as an example, the upper connecting component 41 also includes a connecting column 44 connected to the side of the slider 43 away from the first side. The outer end of the connecting column 44 is connected to a connecting head 45 that can be fixedly connected to the viscosity detection device. The structural type of the above-mentioned connecting head 45 can be reasonably selected, such as magnetic suction type, vacuum suction cup type, clamping claw type, adhesive type, etc. As a specific embodiment, Figure 4 As shown, in the embodiment of the present invention, a clamping-claw type connector 45 is used to clamp and position the outer wall of the measuring cylinder or the Ubbelohde viscometer, which has a simple structure, a wide range of applications and low cost. The aforementioned inductive switch can be detachably connected to the aforementioned connecting column 44. The length of the connecting column 44 in the technical solution can be reasonably selected according to the actual application.

[0044] In a preferred embodiment, a camera component (not marked in the figure) is further provided on the first side surface, and the camera component is used to record the falling or flowing state of the object to be tested in the viscosity detection device in real time, that is, to realize real-time video recording of the falling of the metal ball or the flowing state of the polyacrylonitrile solution in different viscosity detection processes. It can be understood that the formed video image should be stored in the corresponding storage component (for example, the storage component is configured in the device body 1, of course, it can also be externally connected, and the present invention does not specifically limit it).

[0045] In this technical solution, by configuring a camera component in the device to record and store the falling or flowing state of the object to be tested or the sample state in real time, the staff can analyze the state of the solution in the detection process according to the recorded image, such as the motion trajectory of the falling ball (whether it is uniform or variable speed motion), the bubble situation in the solution, etc. The analysis of these situations can further improve the viscosity detection accuracy of the polyacrylonitrile solution and clarify the state of the polymer liquid during normal production. If the production process is abnormal, the state of the polymer liquid produced in the polymerization stage may change, and its viscosity value will also change. The state of the polymer liquid directly affects the production quality of the raw silk in the next spinning stage, thereby affecting the quality of the final product carbon fiber. By analyzing the appearance state, viscosity and other phenomena of the polymer liquid produced under different process parameters, accurate and efficient guidance of on-site production can be achieved.

[0046] In a specific embodiment, the camera component includes a first camera 51, and the first camera 51 is located between the upper sensing switch 21 and the lower sensing switch 22. Generally speaking, the first camera 51 is set at the center of the height of the aforementioned shrinkage groove 11 as much as possible, so that the camera field of view of the first camera 51 can cover the entire length of the detection interval as much as possible, that is, only one camera is configured in the viscosity detection timing device, and the manufacturing cost of the device is relatively low.

[0047] In other embodiments, when the detection interval is long, the field of view of a camera is not wide enough to cover the entire detection interval. In this case, consider increasing the number of cameras, such as setting a second camera 52 above the first camera 51 and a third camera 53 below the first camera 51. This method can provide a more comprehensive full-length image, but the cost is high. The first camera 51, the second camera 52, and the third camera 53 can be cameras on the market that meet the requirements, and the present invention does not improve or protect their specific structures.

[0048] In order to provide a brighter camera field of view, ensure the camera quality, and further ensure subsequent analysis, a lighting component 50 is further provided on the first side. The lighting component 50 is, for example, an LED light group, which consumes less power and can provide sufficient field of view light.

[0049] See Figure 6 and Figure 7 As shown, in some embodiments, a ball throwing mechanism 6 is provided on the upper end surface of the device body 1, and the ball throwing mechanism 6 has a receiving groove 61 for receiving a metal ball, and the metal ball received in the receiving groove 61 can fall into the viscosity detecting device through the material input port of the viscosity detecting device.

[0050] In this technical solution, a ball throwing mechanism 6 is provided on the upper part of the device body 1, and a metal ball for testing is thrown into a viscosity testing device (such as the upper port of the measuring cylinder mentioned above) below the device body 1 through the ball throwing mechanism 6, without manual throwing.

[0051] In a specific embodiment, the pitching mechanism 6 includes a fixed disk 62, a rotating disk 63, and a rotary motor 64 for driving the rotating disk 63 to rotate around its central axis. Figure 8As shown, the rotating disk 63 is provided with a plurality of the receiving grooves 61, and each of the receiving grooves 61 is arranged in sequence along the circumferential direction of the rotating disk 63. It can be understood that the rotating disk 63 is stacked on the fixed disk 62, and the fixed disk 62 has a ball throwing port 621, and the ball throwing port 621 is arranged corresponding to the material feeding port up and down, and the bottom wall of each of the receiving grooves 61 is an open structure, and the rotary motor 64 is fixedly connected to the bottom end surface of the fixed disk 62. It can be understood that when the bottom opening structure of the receiving groove 61 containing the metal ball is not opposite to the aforementioned ball throwing port 621 up and down, the metal ball will be blocked by the disk surface of the fixed disk 62 in the corresponding receiving groove 61, and when the rotating disk 63 is driven to rotate and pushes the metal ball to a position relative to the ball throwing port 621 up and down, the metal ball will fall from the ball throwing port 621 under the action of its own weight into the measuring cylinder below, thereby completing the ball throwing.

[0052] In this technical solution, on the one hand, the ball throwing mechanism 6 can throw multiple metal balls in sequence, and then can realize the detection of multiple parallel samples of falling ball viscosity, that is, to realize the acquisition of multiple falling ball viscosity values ​​for the same polyacrylonitrile solution sample in sequence, and then obtain a more accurate falling ball viscosity by performing corresponding calculations on each falling ball viscosity value; on the other hand, the ball throwing action is realized through the correspondence between the ball throwing port 621 on the fixed disk 62 fixed at the bottom and the metal ball in the receiving groove 61 of the rotating disk 63, and the structural design and control logic are very simple. In practical applications, the rotary motor 64 can be controlled to rotate a certain angle at a preset time interval.

[0053] Specifically, a circular groove (not marked in the figure) is formed on the top surface of the fixed disk 62, and the rotating disk 63 is assembled in the circular groove. The rotating disk 63 specifically includes a hub connected to the rotating shaft of the rotary motor 64, and a plurality of radial partition plates 631 are arranged at intervals along the circumferential direction of the hub on the outer circumferential wall of the hub, and a plurality of circumferential partition plates 632 are arranged at intervals along the radial direction through the radial outer side of the hub, and the aforementioned accommodating groove 61 is formed between two adjacent radial partition plates 631 and two axial partition plates 632, for example Figure 8 and Fig. 9 The multiple fan-shaped grooves shown in the figure have bottom walls of hollow structures. The metal balls are placed in the corresponding receiving grooves 61 at various positions, and the rotating disk 63 is controlled to rotate. The circumferential partition plates 632 and the radial partition plates 631 will constrain the moving trajectory of the metal balls and drive the metal balls to approach the aforementioned ball throwing port 621 on the fixed disk 62 until the metal balls pass through the ball throwing port 621 and fall down by their own weight, thereby completing the throwing of the metal balls.

[0054] In another preferred embodiment, see Fig. 9As shown, a plurality of the receiving grooves 61 are arranged from the inside to the outside on the same diameter direction of the rotating disk 63. At this time, correspondingly, a plurality of ball throwing ports 621 are correspondingly arranged on the same diameter direction of the fixed disk 621, that is, these ball throwing ports 621 are arranged in a line along the diameter direction. In the specific application process, these ball throwing ports 621 coincide with the diameter direction of the material input port of the viscosity detection device below. In this way, each corresponding ball throwing port 621 corresponds to a receiving groove 61 arranged in sequence along the diameter direction of the rotating disk 63. When it is necessary to perform parallel sample tests on the same sample, according to the actual number of parallel samples required, a metal ball is placed in each receiving groove 61 on the same diameter, and then the rotating disk 63 is controlled to rotate and drive each metal ball to roll close to each ball throwing port 621 and finally the metal balls in each receiving groove 61 fall into the viscosity detection device below from the corresponding ball throwing ports 621 at the same time, thereby achieving the purpose of simultaneously throwing multiple balls under the requirements of parallel sample tests.

[0055] In this way, the ball throwing mechanism 6 of the present invention can adjust the balls to fall from multiple different channels or the same channel according to the test requirements. If they fall from different channels, the next ball can be dropped immediately after the first ball falls, shortening the detection time and improving efficiency (when no test analysis is performed, in order to save detection time, the parallel sample test of the sample usually requires each ball to fall from a different channel). If they fall from the same channel, the second ball can be set to fall after a certain period of time. The interval time of the balls falling can be adjusted arbitrarily, which can meet various test requirements. A transparent cover is provided on the top of the fixed plate 62, which can prevent dust and facilitate observation.

[0056] In a preferred embodiment, the ball pitching mechanism 6 is detachably connected to the device body 1 via the fixed disk 62, so that when the falling ball viscosity test is not needed, the ball pitching mechanism 6 can be removed without causing adverse interference to other viscosity test items. The aforementioned detachable connection can be specifically provided with a slot (not shown or labeled) at the top position of the device body 1, and one end of the connecting rod 65 of the ball pitching mechanism 6 can be inserted into the slot. At this time, the fixed housing of the aforementioned rotary motor 64 and the fixed disk 62 are both fixedly connected to the aforementioned connecting rod 65.

[0057] In some embodiments, a power module 71 is integrated in the device body 1, and the power module 71 is used to supply power to the upper induction switch 21, the lower induction switch 22, the display module 3, the rotary motor 64, and the lighting component 50. The power module 71 can specifically use a rechargeable battery as its power supply. In this technical solution, directly configuring the power module 71 in the device body 1 can improve the flexibility and convenience of the device. Specifically, the power module 71 should also be configured with a corresponding power circuit board, which is electrically connected to each electrical component on the device body 1, such as the aforementioned components.

[0058] See Figure 1 As shown, a charging port 73, a copy data interface 74, a detection start switch 75, a lighting switch 76, and a device power switch 77 are also provided on the upper end surface of the device body 1, wherein the charging port 73 is used to charge the aforementioned power module 71, the aforementioned copy data interface 74 is used for the staff to copy the data stored in the control component (including the aforementioned image) to an external device, the detection start switch 75 controls the start of the viscosity detection process, for example, controls the aforementioned rotary motor 64 to rotate and drive the pitching; the aforementioned lighting switch 76 is pressed by the staff when necessary to turn on the lighting component 50 to provide light, and the aforementioned device power switch 77 is the circuit master switch of each electrical component in the device body 1.

[0059] In a specific embodiment, the staff can select the detection mode on the display screen of the aforementioned display module 3, and the detection mode includes a sensing mode and a camera mode. When the staff selects the sensing mode, the sensing switch will be powered on, and when the camera mode is selected, the corresponding camera will be powered on. The staff can select both modes at the same time, or only one of them, depending on actual needs.

[0060] In a specific embodiment, the power module 71 is located at the top of the entire device body 1, and the device power switch 77 is used to control the power on and off of the device. The display screen of the display module 3 will display the power on and off prompts; the power module 71 can maintain the normal operation of the device by charging through the charging port 73 or directly replacing the battery. When replacing the battery, the upper cover of the battery compartment (not marked in the figure) is opened, and the battery can be placed inside, and the power supply operation is convenient and fast; the operator can use tools such as a U disk to copy and analyze the detection data through the copy data interface 74; the detection start switch 75 is used to control whether to start To perform viscosity detection, after pressing, the system will automatically start detecting the time it takes for an object such as a small ball (i.e. the aforementioned metal ball) or a liquid (i.e. the aforementioned polyacrylonitrile solution) to pass through a set distance. Since the object is outside the upper and lower limits of the set distance, when the first object falls a certain distance, the second object can continue to fall (i.e. the aforementioned parallel sample detection process), and parallel samples can be tested at the same time, shortening the detection time without the need for operators to monitor at all times. The lighting switch 76 is used to control the opening and closing of the lighting component 50. The lighting component 50 is located on the upper back of the system to provide a bright field of view for the camera.

[0061] The display module 3 is located on the front of the device body 1 and is provided with a display screen. The display screen can be configured with modules such as detection mode, real-time data, historical detection, flashlight, start, etc.; the detection mode includes induction mode and camera mode, which can be selected as needed. Both modes can detect the time consumed by an object such as a small ball or liquid to pass through a set distance. When the object passes through the upper and lower limits of the set distance, there will be different prompt sounds respectively, and the prompt sounds of the induction mode and the camera mode are also different, which is convenient for the operator to know the current detection method and detection status; the real-time data module includes an online monitoring curve and detection data. The online monitoring curve includes a motion trajectory and a motion curve. The detection data includes a serial number, a detection date, a sample name, a start time, an end time, and a consumed time; the historical detection can see the original records and detection results of all previous detections. By copying the original records, the motion mode of the detection process can be analyzed, such as uniform motion, accelerated motion, and capacity. Easy to bubble situation, etc.; in addition to the lighting switch 76 that can control the switch of the lighting component 50 (such as the lighting lamp mentioned later), the switch of the lighting lamp can also be controlled by clicking the flashlight module on the display screen. When the module displays color, it means that the lighting lamp is turned on, and when it displays a dark color such as gray, it means that the lighting lamp is turned off; the start module on the display screen has the same function as the detection start switch 75. During the detection, the detection can be started by pressing the detection start switch 75, or by clicking the start module on the display screen. When the detection starts, the online monitoring curve of the real-time data module will simulate the motion trajectory of the object, that is, the situation where the object passes through the upper and lower limits, and at the same time, the motion curve of the object will be displayed in real time, such as time-distance curve, time-speed curve, etc. The motion type of the object can also be judged by the motion situation, such as uniform motion, accelerated motion or other motion, etc. After the detection is completed, the detection data will display the final detection result, which is convenient for the operator to observe the detection situation.

[0062] When the object passes through the set upper and lower limits, the induction switch can sense and emit different prompt sounds to achieve fast and accurate timing; the camera mechanism includes the aforementioned first camera 51, second camera 52 and third camera 53. When the object passes through the set upper and lower limits, the corresponding cameras can shoot and emit different prompt sounds to achieve fast and accurate timing, which is convenient for shooting the movement of the object to obtain the detection time result. There is no need for the traditional manual timing process, which is time-consuming and labor-intensive and has large errors. The operation process of this method is convenient and fast, and the detection result is more accurate. Usually, the viscosity of the polyacrylonitrile solution is detected in the following ways: when testing the falling ball viscosity of the polyacrylonitrile solution, the time consumed by the small ball to pass a distance of 100 mm in the polyacrylonitrile solution is detected, and finally the viscosity of the polyacrylonitrile solution is obtained; when testing the characteristic viscosity of the polyacrylonitrile solution, the outflow time of the sample solution between the two scale lines of the capillary in the Ubbelohde viscometer is detected, and finally the viscosity of the polyacrylonitrile solution is obtained.

[0063] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A viscosity detection and timing device for polyacrylonitrile solution, characterized in that: The device comprises a device body (1), wherein an upper sensing switch (21) and a lower sensing switch (22) are arranged at intervals along the height direction on a first side surface of the device body (1), wherein the upper sensing switch (21) and the lower sensing switch (22) are respectively used for automatic sensing detection of an object to be detected passing through their sensing areas, and a display module (3) is also provided on a second side surface of the device body (1), wherein the display module (3) is used for displaying the time difference of the same object to be detected passing through the upper sensing switch (21) and the lower sensing switch (22). A connecting and fixing structure is also provided on the first side surface, wherein the device body (1) is fixedly connected to a viscosity detection device via the connecting and fixing structure, and the first side surface and the second side surface are arranged opposite to each other.

2. The viscosity detection timing device according to claim 1, characterized in that: The connection fixing structure comprises an upper connection component (41) and a lower connection component (42), and the upper connection component (41) and the lower connection component (42) are slidably connected to the first side surface so as to adjust the distance between the two in the height direction; and / or, when the object to be detected is a metal ball, the upper induction switch (21) and the lower induction switch (22) are infrared induction switches and electromagnetic induction switches, and when the object to be detected is a polyacrylonitrile solution, the upper induction switch (21) and the lower induction switch (22) are capacitive induction switches.

3. The viscosity detection timing device according to claim 2, characterized in that: The upper connecting component (41) and the lower connecting component (42) both include a slider (43), the first side surface is provided with a shrinking groove (11) which passes through the upper and lower end surfaces of the device body (1) along the height direction, the slider (43) is embedded in the shrinking groove (11), the first side surface is also provided with a scale mark (12) arranged along the height direction, and the outer surface of the slider (43) is provided with a positioning mark (431).

4. The viscosity detection timing device according to claim 3, characterized in that: The upper sensing switch (21) is detachably connected to the upper connecting component (41), and the lower sensing switch (22) is detachably connected to the lower connecting component (42).

5. The viscosity detection timing device according to claim 1, characterized in that: A camera component is also provided on the first side surface, and the camera component is used to record the falling or flowing state of the object to be tested in the viscosity detection device in real time.

6. The viscosity detection timing device according to claim 5, characterized in that: The first side surface is also provided with a lighting component (50); and / or the camera component includes a first camera (51), and the first camera (51) is located between the upper sensing switch (21) and the lower sensing switch (22).

7. The viscosity detection timing device according to claim 1, characterized in that: A ball throwing mechanism (6) is provided on the upper end surface of the device body (1), and the ball throwing mechanism (6) has a receiving groove (61) for receiving a metal ball. The metal ball received in the receiving groove (61) can fall into the viscosity detection device through the material input port of the viscosity detection device.

8. The viscosity detection timing device according to claim 7, characterized in that: The ball throwing mechanism (6) comprises a fixed disk (62), a rotating disk (63), and a rotary motor (64) for driving the rotating disk (63) to rotate around its central axis. The rotating disk (63) is provided with a plurality of the receiving grooves (61), each of the receiving grooves (61) is arranged in sequence along the circumferential direction of the rotating disk (63). The fixed disk (62) has a ball throwing port (621), the ball throwing port (621) is arranged correspondingly to the material input port above and below, and the bottom wall of each of the receiving grooves (61) is an open structure. The rotary motor (64) is fixedly connected to the bottom end surface of the fixed disk (62).

9. The viscosity detection timing device according to claim 8, characterized in that: The pitching mechanism (6) is detachably connected to the device body (1) via the fixed disk (62); and / or a plurality of the accommodating grooves (61) are arranged from the inside to the outside in the same diameter direction of the rotating disk (63).

10. The viscosity detection timing device according to claim 8, characterized in that: A power module (71) is integrated in the device body (1), and the power module (71) is used to supply power to the upper induction switch (21), the lower induction switch (22), the display module (3), and the rotary motor (64).

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