Epoxy resin viscosity detection device

Abstract

The invention discloses an epoxy resin viscosity detection device, and relates to the field of resin viscosity detection, the epoxy resin viscosity detection device comprises a detection box body, one side of the detection box body is rotatably connected with a rotating shaft, the rotating shaft is fixedly provided with a winding reel, the winding reel is connected with a traction rope, and the traction rope is connected with a counterweight through a pulley. The balance weight piece can drive the rotating shaft to rotate when moving in the first direction under the action of self weight, the time difference between the first position and the second position of the balance weight piece is recorded by the data acquisition mechanism when the balance weight piece moves, and one end of the rotating shaft is detachably connected with the rotor; the counterweight part freely falls to drive the rotor to rotate, the viscosity can be quickly calculated only by recording the moving time difference of the counterweight part from the first position to the second position, and compared with a traditional rotary viscometer needing to wait for steady-state data, the device remarkably shortens the detection time, meets the requirement for real-time monitoring in the production process and improves the production efficiency. And process parameters can be conveniently adjusted in time.

Description

Technical Field

[0001] The present invention relates to the technology for detecting resin viscosity, and particularly to an epoxy resin viscosity detection device. Background Art

[0002] During the industrial production process of epoxy resin, especially in key reaction stages such as prepolymerization and gelation, it is necessary to monitor the resin viscosity in real time to accurately control the reaction progress (such as adjusting the temperature or adding additives). The traditional rotational viscometer needs to wait for the system to reach a steady state to obtain data, and the detection takes a long time, which cannot meet the urgent need for real-time performance in the production scenario. Summary of the Invention

[0003] The purpose of the present invention is to provide an epoxy resin viscosity detection device to solve the above deficiencies in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An epoxy resin viscosity detection device includes a detection box body. One side of the detection box body is rotatably connected with a rotating shaft. A winding cylinder is fixedly installed on the rotating shaft. A traction rope is connected to the winding cylinder. The traction rope is connected with a counterweight through a pulley. When the counterweight moves along the first direction under its own weight, it can drive the rotating shaft to rotate, and the time difference is recorded by a data acquisition mechanism when the counterweight moves between the first position and the second position. One end of the rotating shaft is detachably connected with a rotor. During detection, the rotating shaft is arranged vertically and the rotor is immersed in the resin.

[0005] Further, the rotating shaft is connected with a first driving member for driving its rotation. Among them, the first driving member drives the rotating shaft to rotate until the winding cylinder winds the traction rope, so that the counterweight rises to a preset height and then stops. Then the first driving member disconnects from the rotating shaft, making the rotating shaft in a freely rotating state.

[0006] Further, the first driving member includes a first helical gear and a second helical gear. The first helical gear is fixedly connected to the surface of the rotating shaft. The second helical gear has an intermittent part with a discontinuous tooth surface. When the first helical gear is located at the intermittent part, it disengages from the second helical gear and can rotate freely.

[0007] Further, the data acquisition mechanism records the displacement difference of the counterweight moving along the first direction per unit time.

[0008] Further, a slide rail is arranged in the first direction, and the slide rail can rotate around the rotation axis of the pulley.

[0009] Further, the angle of the slide rail rotating from the vertical direction is 0° - 45°.

[0010] Further, the pulley is rotatably mounted in the detection box body through a second rotating shaft. A bracket is fixedly connected to the second rotating shaft. The other end of the bracket is fixedly connected to a slide rail. A guide rod is fixedly connected to the slide rail. The guide rod is slidably connected to a counterweight. Wherein, the direction in which the counterweight slides along the guide rod is the first direction.

[0011] Further, the second rotating shaft is connected to a second driving member for driving its rotation.

[0012] Further, one end of the second rotating shaft is connected to a worm gear. A worm is meshed and connected to one side of the worm gear. One end of the worm penetrates through the detection box body and is rotatably connected to the inner wall of the detection box body. The end of the worm is connected to a knob.

[0013] Further, the rotating shaft is fixed in the detection box body through a rotating frame. The rotating frame is rotatably connected to the rotating shaft.

[0014] Compared with the prior art, an epoxy resin viscosity detection device provided by the present invention has the following beneficial effects:

[0015] By driving the rotor to rotate by the free fall of the counterweight member, only the time difference of the movement of the counterweight member from the first position to the second position needs to be recorded to quickly calculate the viscosity. Compared with the traditional rotational viscometer that needs to wait for steady-state data, the detection time of this device is significantly shortened (especially applicable to the key stages of resin synthesis reaction, such as prepolymerization or the early stage of gelation), meeting the requirements of real-time monitoring in the production process and facilitating timely adjustment of process parameters;

[0016] At the same time, a mechanical counterweight drive system is used to replace complex motors and torque sensors. The overall structure is simple, reducing vulnerable parts and maintenance requirements. At the same time, the device does not require high-precision electronic components, reducing the manufacturing cost and being suitable for large-scale industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic longitudinal section of the detection box body provided in Embodiment 1 of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the detection device provided in Embodiment 2 of the present invention;

[0020] Figure 3 For the present invention Figure 2 longitudinal section schematic diagram;

[0021] Figure 4Schematic diagram of the slide rail structure provided by the second embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structures of the first helical gear and the second helical gear provided by the embodiment of the present invention.

[0023] Explanation of reference numerals:

[0024] 1. Detection box body; 2. Rotating shaft; 21. Rotating frame; 22. Pulley; 23. Second rotating shaft; 24. Bracket; 25. Slide rail; 26. Guide rod; 3. Winding drum; 4. Traction rope; 5. Counterweight; 51. First position; 52. Second position; 53. Data acquisition mechanism; 54. First direction; 6. Rotor; 7. First driving member; 71. First helical gear; 72. Second helical gear; 73. Spacing portion; 74. First rotating shaft; 8. Second driving member; 81. Worm gear; 82. Worm; 83. Knob. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1:

[0027] Please refer to Figure 1 - Figure 5 , an epoxy resin viscosity detection device, including a detection box body 1, a rotating shaft 2 is rotatably connected to one side of the detection box body 1, a winding drum 3 is fixedly installed on the rotating shaft 2, a traction rope 4 is connected to the winding drum 3, the traction rope 4 is connected to a counterweight 5 through a pulley 22, when the counterweight 5 moves along the first direction 54 under its own weight, it can drive the rotating shaft 2 to rotate, and when the counterweight 5 moves, the time difference is recorded by the data acquisition mechanism 53 at the first position 51 and the second position 52, one end of the rotating shaft 2 is detachably connected to a rotor 6, during detection, the rotating shaft 2 is arranged in the vertical direction and the rotor 6 is immersed in the resin;

[0028] As Figure 1 shown, when the epoxy resin viscosity detection device is in use, the detection box body 1 is erected above the resin to be detected. For example, during production operations, the detection box body 1 can be fixed on the top of the mixing tank, or the detection box body 1 can be erected on the tabletop. After sampling with a sampling cup, the detection can be carried out on the tabletop; in either case, when detecting, the detection box body 1 needs to be fixed, and the rotating shaft 2 is arranged in the vertical direction;

[0029] Then, install the required rotor 6 at the bottom of the rotating shaft 2 for detection. Among them, the rotors 6 have different specifications. Generally, cylindrical rotors 6 can be used. Each rotor 6 has a different diameter to match resins with different viscosities for detection. The principle is that the fluid will hinder the movement of the rotor 6 due to viscous resistance, generating a torque (moment) proportional to the viscosity. In the prior art, by rotating the rotor 6 at a constant speed and using sensors (such as torque sensors or strain gauges) to detect the resistance torque on the rotor 6, the torque magnitude directly reflects the viscosity of the fluid, thereby obtaining the detection result. However, this generally requires a long time to obtain accurate detection results. In the case of stable processes, it is often not necessary to perform accurate viscosity detection during production. Instead, it is necessary to perform preliminary viscosity detection in a timely manner to judge the progress during the resin synthesis process and to guide the corresponding equipment control during production. This requires a certain degree of timeliness, and existing viscometers (such as rotational viscometers) meet this requirement;

[0030] In this embodiment, a specific example of using this epoxy resin viscosity detection device is provided:

[0031] Install the detection box body 1 at the required detection position, make the rotating shaft 2 in a vertical state, and select a suitable rotor 6 for installation. Drive the rotating shaft 2 to rotate so that the traction rope 4 is wound around the winding drum 3, and drive the counterweight 5 to move upward. Then immerse the rotor 6 into the resin to be detected, and release the rotating shaft 2 to make it in a freely rotating state. Under the action of the gravity of the counterweight 5, the rotating shaft 2 is driven to rotate through the traction rope 4. When the rotating shaft 2 rotates, it drives the rotor 6 to rotate in the resin. Record the moving time of the counterweight 5 from the first position 51 to the second position 52. The time can be directly used as the detection result to correspond to the viscosity of the resin, so as to make a preliminary judgment. It should be noted that the first position 51 and the second position 52 are set according to the moving path of the counterweight 5, and the first position 51 and the second position 52 should be located in the middle section of the moving process of the counterweight 5, and should be avoided being set at the positions before and after the movement of the counterweight 5. The reason is that when the counterweight 5 acts on the rotating shaft 2 to rotate, the rotor 6 needs to accelerate from rest or change from a moving state to a stationary state. The speed is unstable in the initial and final stages, affecting the accuracy;

[0032] After the detection is completed, take out the rotor 6 from the resin, clean it and store it properly, or perform the next detection after cleaning.

[0033] In this embodiment, the rotating shaft 2 is connected to a first driving member 7 for driving its rotation. Among them, the first driving member 7 drives the rotating shaft 2 to rotate until the winding drum 3 winds the traction rope 4, and the counterweight 5 rises to a preset height and then stops. Then the first driving member 7 disconnects from the rotating shaft 2, making the rotating shaft 2 in a freely rotating state.

[0034] In this embodiment, the rotating shaft 2 is fixed in the detection box body 1 through the rotating frame 21. The rotating frame 21 is rotatably connected to the rotating shaft 2, further improving the stability of the rotating shaft 2 during rotation.

[0035] In this embodiment, a specific example of the first driving member 7 (not shown in the figure) is provided. Specifically, the upper end of the rotating shaft 2 extends to the outside of the detection box body 1. The rotating shaft 2 is connected to a manual rotating wheel. When detection is required, the staff rotates the manual rotating wheel to drive the rotating shaft 2 to rotate. At this time, the winding cylinder 3 winds the traction rope 4 to drive the counterweight 5 to rise. After rising to a preset height, releasing the manual rotating wheel enables the rotating shaft 2 to be in a free rotation state. The counterweight 5 drives the rotating shaft 2 and the rotor 6 to rotate under the action of gravity. By recording the moving time of the counterweight 5, the resin viscosity can be quickly judged.

[0036] In this embodiment, another specific example of the first driving member 7 is provided. As Figure 3 and Figure 5 shown, the first driving member 7 includes a first helical gear 71 and a second helical gear 72. The first helical gear 71 is fixedly connected to the surface of the rotating shaft 2. The second helical gear 72 has an intermittent portion 73 with a discontinuous tooth surface. When the first helical gear 71 is located at the intermittent position, it disengages from the second helical gear 72 and can rotate freely. One side of the second helical gear 72 is fixedly connected to a first rotating shaft 74. The first rotating shaft 74 is rotatably connected to the inner wall of the detection box body 1. The first rotating shaft 74 is connected to an electric motor or a hydraulic motor or a pneumatic motor for driving its rotation.

[0037] When the second helical gear 72 rotates, its tooth surface meshes with the first helical gear 71 to drive the rotating shaft 2 to rotate, wind the traction rope 4 to make the counterweight 5 rise to a preset height. Subsequently, the intermittent portion 73 of the second helical gear 72 aligns with the first helical gear 71, disengaging the meshing. The rotating shaft 2 rotates freely, and the counterweight 5 drives the rotor 6 to rotate under the action of gravity. It should be noted that the second helical gear 72 and the first helical gear 71 have a certain transmission ratio. When the second helical gear 72 rotates to the intermittent portion 73 aligning with the first helical gear 71, the number of rotations of the rotating shaft 2 can make the counterweight 5 rise to a preset height, ensuring that the detection conditions are the same each time.

[0038] In this embodiment, a specific example of a collection mechanism is provided. Specifically, the device for recording the movement time of the counterweight 5 from the first position 51 to the second position 52 can be a pair of optoelectronic sensors. They are arranged on the movement path of the counterweight 5 and installed at the corresponding first position 51 and second position 52. The sensors are connected to a timer. By detecting whether the optical path is blocked, the start and end of timing are triggered. When the counterweight 5 passes through the first position 51, it blocks the optical path of the first pair of optoelectronic sensors, triggering the timer to start timing. When the counterweight 5 reaches the second position 52, it blocks the optical path of the second pair of optoelectronic sensors, and the timer stops and records the time difference. In this way, not only is the detection time significantly shortened, but the viscosity change can also be monitored in real time.

[0039] In this embodiment, another device (not shown in the figure) for recording the movement time of the counterweight 5 from the first position 51 to the second position 52 is provided. A micro magnet is installed on the counterweight 5, and Hall sensors are fixed at the first position 51 and the second position 52 on the path. The Hall sensors detect the magnetic field change and output signals to the timing module. When the counterweight 5 moves, the magnet passes through the Hall sensor at the first position 51, triggering the start of timing. When it reaches the second position 52, the magnet triggers the second Hall sensor, and the timing ends and the time is output.

[0040] In this embodiment, a third device (not shown in the figure) for recording the movement time of the counterweight 5 from the first position 51 to the second position 52 is provided. A camera or a laser range finder is installed on the side or above the detection box 1, aiming at the movement path of the counterweight 5 to identify the real-time position of the counterweight 5. When the counterweight 5 enters the preset area of the first position 51, it is marked as the starting point of timing. When it reaches the second position 52, it is marked as the end point, and the time difference between the two is calculated.

[0041] In summary, replacing the traditional rotational viscometer with this counterweight type viscosity detection device has the following significant advantages in the epoxy resin production environment:

[0042] The traditional rotational viscometer relies on motor drive and torque sensors and needs to wait for steady-state measurement data, which takes a long time. However, this device drives the rotor 6 through the free fall of the counterweight 5, and only needs to record the movement time of the counterweight to quickly calculate the viscosity, meeting the real-time requirements in the production process. For example, in the key stages of resin synthesis reaction (such as prepolymerization, early gel stage), it is necessary to quickly judge the reaction progress in order to adjust the temperature or add additives in time to avoid batch abnormalities caused by detection delay, thereby ensuring stable product quality. In addition, this device has a simple structure and low maintenance cost, is suitable for large-scale production applications, and effectively improves production efficiency.

[0043] Embodiment Two:

[0044] During the implementation process, the replacement of the rotor 6 specifications will be involved, and the weight of the counterweight 5 needs to be adjusted at different stages of the resin production process to match different viscosity ranges. When designing the device, a convenient replacement mechanism should be considered. The replacement of the rotor 6 is often inevitable and the operation is simple. However, the replacement of the counterweight 5 is relatively cumbersome. Errors (such as damage, adhesion of foreign objects, etc.) are easily generated during the replacement of the counterweight 5, and the counterweight 5 is usually arranged inside the detection box 1, which is inconvenient for replacement. Therefore, a more convenient method is proposed to solve the above problems. Specifically, please refer to Figure 2 - Figure 5 , the pulley 22 is rotatably installed in the detection box 1 through the second rotating shaft 23. A bracket 24 is fixedly connected to the second rotating shaft 23. As Figure 3 shown, the bracket 24 is L-shaped. The other end of the bracket 24 is fixedly connected with a slide rail 25. A guide rod 26 is fixedly connected to the slide rail 25. The guide rod 26 is slidably connected with the counterweight block. Among them, the direction in which the counterweight block slides along the guide rod 26 is the first direction 54;

[0045] The slide rail 25 can rotate around the rotation axis 2 of the pulley 22. It should be understood that the position where the slide rail 25 rotates defines the direction in which the counterweight block can move, and this direction is the current first direction 54. That is to say, the specific position of the first direction 54 changes according to the rotation of the slide rail 25;

[0046] As Figure 3 shown, with the change of the position of the slide rail 25 (the first direction 54), the traction force of the counterweight 5 on the traction rope 4 under the action of gravity also changes. The larger the rotation angle of the slide rail 25 from the vertical direction, the smaller the effective acting force on the traction rope 4. At this time, for the rotation axis 2, the force driving its rotation is also smaller. This also indirectly changes the weight of the counterweight 5, so that the actual traction force received by the traction rope 4 changes without changing the weight of the counterweight 5 itself;

[0047] The sliding connection mode between the guide rod 26 and the counterweight block can be the way of linear ball bearings or lubricating material sliding bushings (such as graphite materials with low friction coefficients, etc.). This is the prior art and will not be specifically described here. The specific structure is not drawn in the figure.

[0048] In this embodiment, the rotation angle of the slide rail 25 (rotating from the vertical direction) is 0°-45°. When the rotation angle is 0°, the slide rail 25 is arranged along the vertical direction. It should be noted that the rotation angle should not be too large, otherwise the friction force between the counterweight 5 and the guide rod 26 will be relatively large (the component of the gravity of the counterweight 5 in the radial direction of the guide rod 26 increases), which is likely to cause insufficient traction force on the traction rope 4. During use, the counterweight block may experience a short-term stagnation phenomenon, affecting the detection result. Usually, the rotation angle should not exceed 45°. Figure 3The schematic diagram of the state when the slide rail 25 is at 45° is shown.

[0049] In this embodiment, a sensor for detecting the position of the counterweight 5 is installed on the slide rail 25. It is set in a way of the first embodiment. Corresponding to the first position 51 and the second position 52, the counterweight 5 is recorded during the movement.

[0050] It should be noted that during the movement of the counterweight 5, what can also be recorded is the distance moved within a certain period of time. Specifically, when the counterweight 5 moves under its own weight, timing starts after the driving rotating shaft 2 rotates a certain angle or the counterweight 5 moves a certain distance. The moving distance of the counterweight 5 within the specified time is recorded (realized by setting a distance sensor). Through recording the distance for a preliminary judgment, for example, if the distance is shorter per unit time, it indicates that the viscosity of the resin system is higher, and vice versa. In some environments with restrictions on the detection time during the production process, this method can also be used for a preliminary judgment of the system viscosity.

[0051] In this embodiment, the second rotating shaft 23 is connected to a second driving member 8 for driving its rotation.

[0052] In this embodiment, the second driving member 8 can be adjusted manually. For example, Figure 3 As shown, one end of the second rotating shaft 23 is connected with a worm gear 81. One side of the worm gear 81 is meshed and connected with a worm 82. One end of the worm 82 penetrates through the detection box body 1 and is rotationally connected with the inner wall of the detection box body 1. The end of the worm 82 is connected with a knob 83. By rotating the knob 83 to drive the worm 82 to rotate, the worm gear 81 and the second rotating shaft 23 are driven to rotate. The self-locking effect of the worm gear 81 and the worm 82 ensures the stability of the adjusted angle, avoids errors caused by external vibrations, and realizes the precise adjustment of the rotation angle of the slide rail 25.

[0053] In this embodiment, another specific example of the second driving member 8 (not shown in the figure) is provided. It is an electric motor or a hydraulic motor or a pneumatic motor. The output end of the electric motor or the output end of the hydraulic motor or the output end of the pneumatic motor is connected to the second rotating shaft 23. By controlling the rotation speed and direction of the motor, the precise adjustment of the rotation angle of the slide rail 25 is realized.

[0054] It should be noted that under the setting of the first embodiment, when the slide rail 25 rotates, the extension length of the traction rope 4 will change accordingly. During the angle adjustment process, the initial state of the rotating shaft 2 can be adjusted by rotating the second helical gear 72 so that the traction rope 4 is in a suitable tension state, ensuring the smooth movement of the counterweight 5, avoiding detection errors caused by the traction rope 4 being slack or too tight. At the same time, when the second helical gear 72 rotates to align the spacer 73 with the first helical gear 71, the number of turns of the rotating shaft 2 can make the counterweight 5 rise to the preset height.

[0055] Only certain exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present invention.

Claims

1. An epoxy resin viscosity detection device, characterized in that, It includes a detection box body (1). One side of the detection box body (1) is rotatably connected with a rotating shaft (2). A winding drum (3) is fixedly installed on the rotating shaft (2). A traction rope (4) is connected to the winding drum (3). The traction rope (4) is connected with a counterweight (5) through a pulley (22). When the counterweight (5) moves along the first direction (54) under its own weight, it can drive the rotating shaft (2) to rotate. And when the counterweight (5) moves, the time difference is recorded by the data acquisition mechanism (53) at the first position (51) and the second position (52). One end of the rotating shaft (2) is detachably connected to a rotor (6). During detection, the rotating shaft (2) is arranged in the vertical direction and the rotor (6) is immersed in the resin.

2. The epoxy resin viscosity detection device according to claim 1, characterized in that, The rotating shaft (2) is connected to a first driving member (7) for driving its rotation. Among them, the first driving member (7) drives the rotating shaft (2) to rotate until the winding drum (3) winds the traction rope (4), stops after the counterweight (5) rises to a preset height, and then the first driving member (7) disconnects from the rotating shaft (2) to make the rotating shaft (2) in a free rotation state.

3. An epoxy resin viscosity detection device according to claim 2, characterized in that, The first driving member (7) includes a first helical gear (71) and a second helical gear (72). The first helical gear (71) is fixedly connected to the surface of the rotating shaft (2). The second helical gear (72) has an interval part (73) with discontinuous tooth surfaces. When the first helical gear (71) is at the interval, it disengages from the second helical gear (72) and can rotate freely.

4. The epoxy resin viscosity detection device according to claim 1, characterized in that, The data acquisition mechanism (53) records the displacement difference of the counterweight (5) moving along the first direction (54) per unit time.

5. An epoxy resin viscosity detection device according to claim 1, characterized in that, A slide rail (25) is arranged in the first direction (54). The slide rail (25) can rotate around the axis of the pulley (22).

6. The epoxy resin viscosity detection device according to claim 5, wherein The angle of the slide rail (25) rotating from the vertical direction is 0° - 45°.

7. An epoxy resin viscosity detection device according to claim 6, characterized in that, The pulley (22) is rotatably installed in the detection box body (1) through a second rotating shaft (23). A bracket (24) is fixedly connected to the second rotating shaft (23). The other end of the bracket (24) is fixedly connected to a slide rail (25). A guide rod (26) is fixedly connected to the slide rail (25). The guide rod (26) is slidably connected with the counterweight block. Among them, the direction when the counterweight block slides along the guide rod (26) is the first direction (54).

8. An epoxy resin viscosity detection device according to claim 7, characterized in that, The second rotating shaft (23) is connected to a second driving member (8) for driving its rotation.

9. The epoxy resin viscosity detection device according to claim 8, characterized in that One end of the second rotating shaft (23) is connected with a worm gear (81). One side of the worm gear (81) is meshed with a worm (82). One end of the worm (82) penetrates through the detection box body (1) and is rotatably connected to the inner wall of the detection box body (1). The end of the worm (82) is connected with a knob (83).

10. The epoxy resin viscosity detection device according to claim 1, characterized in that, The rotating shaft (2) is fixed in the detection box body (1) through a rotating frame (21). The rotating frame (21) is rotatably connected with the rotating shaft (2).

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