An epoxy resin viscosity detection device

Abstract

The application discloses an epoxy resin viscosity detection device and relates to the field of resin viscosity detection.The device comprises a detection box body, a rotating shaft is rotatably connected to one side of the detection box body, a winding drum is fixedly installed on the rotating shaft, a traction rope is connected to the winding drum, a counterweight is connected to the traction rope through a pulley, the counterweight can drive the rotating shaft to rotate when moving in a first direction under the action of gravity, the counterweight is recorded by a data acquisition mechanism when moving in the first position and the second position, and the rotating shaft is detachably connected to a rotor at one end. The counterweight is driven to rotate by free falling, and the viscosity can be quickly calculated by only recording the time difference of the movement of the counterweight from the first position to the second position, compared with the traditional rotating viscometer which needs to wait for steady-state data, the device significantly shortens the detection time, meets the demand for real-time monitoring in the production process, and is convenient for timely adjustment of process parameters.

Description

TECHNICAL FIELD

[0001] The present application relates to resin viscosity detection technology, and in particular to an epoxy resin viscosity detection device. BACKGROUND

[0002] In the industrial production process of epoxy resin, especially in the key reaction stages such as pre-polymerization and gelation, the resin viscosity needs to be monitored in real time to accurately control the reaction progress (such as adjusting the temperature or adding additives). The traditional rotary viscometer needs to wait for the system to reach a steady state to obtain data, which takes a long time to detect and cannot meet the urgent demand for real-time production. SUMMARY

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

[0004] In order to achieve the above purpose, the present application provides the following technical scheme: an epoxy resin viscosity detection device, comprising a detection box body, a rotating shaft is rotatably connected to one side of the detection box body, a winding drum is fixedly installed on the rotating shaft, a traction rope is connected to the winding drum, the traction rope is connected to a counterweight through a pulley, the counterweight can drive the rotating shaft to rotate when moving in a first direction under the action of gravity, and the time difference is recorded by a data acquisition mechanism when the counterweight moves in the first position and the second position, and the rotating shaft is detachably connected to a rotor at one end. When detecting, the rotating shaft is arranged in a vertical direction and the rotor is immersed in the resin.

[0005] Further, the rotating shaft is connected to a first driving member for driving the rotation thereof, wherein the first driving member drives the rotating shaft to rotate to wind the traction rope on the winding drum, and the counterweight is lifted to a preset height and then stopped, and then the first driving member is disconnected from the rotating shaft, so that the rotating shaft is in a free rotation state.

[0006] Further, the first driving member comprises a first helical gear and a second helical gear, the first helical gear is fixedly connected to the surface of the rotating shaft, and the second helical gear has a tooth surface discontinuous interval portion, and when the first helical gear is located in the interval portion, the first helical gear is disengaged from the second helical gear and can rotate freely.

[0007] Further, the data acquisition mechanism records the displacement difference of the counterweight moving in 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 installed in the detection box through a second rotating shaft, a support is fixedly connected to the second rotating shaft, a slide rail is fixedly connected to one end of the support, a guide rod is fixedly connected to the slide rail, and the counterweight is slidably connected to the guide rod.

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

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

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

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

[0015] The counterweight is driven to rotate freely, and the viscosity can be quickly calculated by recording the time difference of the movement of the counterweight from the first position to the second position. Compared with the traditional rotational viscometer which needs to wait for steady-state data, the detection time of the device is significantly shortened (especially suitable for the key stage of resin synthesis reaction, such as pre-polymerization or gelation), which meets the demand for real-time monitoring in the production process and facilitates timely adjustment of process parameters.

[0016] Meanwhile, the mechanical counterweight driving system replaces the complex motor and torque sensor, the overall structure is simple, the number of vulnerable parts and maintenance requirements are reduced, and meanwhile, the device does not need high-precision electronic components, thereby reducing the manufacturing cost and being suitable for large-scale industrial application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0018] Figure 1 The longitudinal section view of the detection box provided in Embodiment One of the present application is shown;

[0019] Figure 2 The detection device structure schematic view provided in Embodiment Two of the present application is shown;

[0020] Figure 3 The longitudinal section view of the present application is shown; Figure 2

[0021] Figure 4 ​A sliding rail structure schematic diagram provided for the second embodiment of the present application;

[0022] Figure 5 A structure schematic diagram of the first and second helical gears provided for the embodiment of the present application.

[0023] Legend of reference signs:

[0024] 1, detection box; 2, rotating shaft; 21, rotating frame; 22, pulley; 23, second rotating shaft; 24, support; 25, sliding 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 DESCRIPTION

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

[0026] Embodiment one:

[0027] Please refer to Figure 1 - Figure 5 An epoxy resin viscosity detection device, comprising a detection box 1, a rotating shaft 2 is rotatably connected to one side of the detection box 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, the counterweight 5 can drive the rotating shaft 2 to rotate when moving in the first direction 54 under the action of its own weight, and the time difference is recorded by a data acquisition mechanism 53 when the counterweight 5 moves in the first position 51 and the second position 52, and the rotating shaft 2 is detachably connected to a rotor 6 at one end, when detecting, the rotating shaft 2 is arranged in a 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 1 is erected above the resin to be detected, such as during production operation, the detection box 1 can be fixed on the top of the mixing tank, or the detection box 1 can be erected on the desktop, and the sample is taken by a sampling cup and detected on the desktop; no matter which way, the detection box 1 needs to be fixed during detection, and the rotating shaft 2 is arranged in a vertical direction.

[0029] Then install the required rotor 6 at the bottom of the rotating shaft 2 for detection, wherein the rotor 6 has different specifications, and generally a cylindrical rotor 6 can be used, and each rotor 6 has a different diameter to match the detection of resins with different viscosities. The principle is to use the viscous resistance of the fluid to hinder the movement of the rotor 6, generate a torque (moment) proportional to the viscosity. In the prior art, the rotor 6 is rotated at a constant speed, and the resistance torque acting on the rotor 6 is detected by using a sensor (such as a torque sensor or a strain gauge). The size of the torque 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 process, accurate viscosity detection is often not required during production. Instead, preliminary viscosity detection is required in a timely manner to judge the progress of the resin synthesis process and to guide the corresponding equipment control during production. This requires a certain timeliness. The existing viscometer (such as a rotary viscometer) meets this demand.

[0030] In the present embodiment, a specific example of the use of the epoxy resin viscosity detection device is provided:

[0031] Install the detection box 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 to make the traction rope 4 wind around the winding drum 3 and drive the counterweight 5 to move upwards. Then immerse the rotor 6 in the resin to be detected, release the rotating shaft 2 to make it in a free rotating state. Under the action of the gravity of the counterweight 5, the rotating shaft 2 rotates by being pulled by the traction rope 4. The rotating shaft 2 drives the rotor 6 to rotate in the resin. The movement time of the counterweight 5 from the first position 51 to the second position 52 is recorded. The time can be directly used as the detection result to correspond to the viscosity of the resin, thereby making a preliminary judgment. It should be noted that the first position 51 and the second position 52 are set according to the movement path of the counterweight 5, and the first position 51 and the second position 52 should be located at the middle segment position of the movement process of the counterweight 5 to avoid 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 static or change from moving state to static. The speed is unstable at the initial stage and the termination stage, which affects the accuracy.

[0032] After detection is completed, the rotor 6 is taken out of the resin, cleaned and properly stored, or cleaned and used for the next detection.

[0033] In the present embodiment, the rotating shaft 2 is connected to a first driving member 7 for driving the rotation thereof. The first driving member 7 drives the rotating shaft 2 to rotate to wind the traction rope 4 around the winding drum 3, makes the counterweight 5 rise to a preset height and then stops. Then the first driving member 7 is disconnected from the rotating shaft 2, so that the rotating shaft 2 is in a free rotating state.

[0034] In the embodiment, the rotating shaft 2 is fixed in the detection box 1 through the rotating frame 21, and the rotating frame 21 is rotationally connected with the rotating shaft 2, thereby further improving the stability of the rotating shaft 2 during rotation.

[0035] In the embodiment, a specific example of the first driving member 7 is provided (not shown in the figure), specifically, the upper end of the rotating shaft 2 extends to the outside of the detection box 1, and the rotating shaft 2 is connected with a manual rotating wheel. When detection is needed, the manual rotating wheel is rotated by the worker to drive the rotating shaft 2 to rotate. At this time, the winding drum 3 is wound with the traction rope 4 to drive the counterweight 5 to rise to a preset height. After rising to the preset height, the manual rotating wheel is released to make the rotating shaft 2 in a free rotation state. The counterweight 5 drives the rotating shaft 2 and the rotor 6 to rotate under the action of gravity. The movement time of the counterweight 5 is recorded, and the resin viscosity can be quickly judged.

[0036] In the embodiment, another specific example of the first driving member 7 is provided, as shown in Figure 3 and Figure 5 The first driving member 7 includes a first bevel gear 71 and a second bevel gear 72. The first bevel gear 71 is fixedly connected with the surface of the rotating shaft 2. The second bevel gear 72 has a tooth surface discontinuous interval 73. When the first bevel gear 71 is located at the interval, the meshing with the second bevel gear 72 is released and can be freely rotated. The second bevel gear 72 is fixedly connected with a first rotating shaft 74 on one side. The first rotating shaft 74 is rotationally connected with the inner wall of the detection box 1. The first rotating shaft 74 is connected with an electric motor or a hydraulic motor or a pneumatic motor for driving the rotation thereof.

[0037] When the second bevel gear 72 rotates, the tooth surface thereof meshes with the first bevel gear 71 to drive the rotating shaft 2 to rotate. The winding drum 3 is wound with the traction rope 4 to make the counterweight 5 rise to a preset height. Subsequently, the interval 73 of the second bevel gear 72 is aligned with the first bevel gear 71 to release the meshing, and the rotating shaft 2 is freely rotated. The counterweight 5 drives the rotor 6 to rotate under the action of gravity. It should be noted that the second bevel gear 72 has a certain transmission ratio with the first bevel gear 71. When the second bevel gear 72 rotates to the interval 73 aligned with the first bevel gear 71, the number of rotations of the rotating shaft 2 can make the counterweight 5 rise to the preset height, thereby ensuring that the detection conditions are consistent 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 photoelectric sensors 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, which is triggered to start and stop timing by detecting whether the light path is blocked. When the counterweight 5 passes the first position 51, the light path of the first pair of photoelectric sensors is blocked, triggering the timer to start timing. When the counterweight 5 reaches the second position 52, the light path of the second pair of photoelectric sensors is blocked, and the timer stops and records the time difference. In this way, not only is the detection time greatly shortened, but real-time monitoring of viscosity changes is also achieved.

[0039] In this embodiment, another device for recording the movement time of the counterweight 5 from the first position 51 to the second position 52 is provided (not shown in the figure). A miniature magnet is installed on the counterweight 5, and a Hall sensor is fixed at the first position 51 and the second position 52 of the path. The Hall sensor detects changes in the magnetic field and outputs a signal to a timing module. When the counterweight 5 moves, the magnet passes 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, ending the timing and outputting the time.

[0040] In this embodiment, a third device for recording the movement time of the counterweight 5 from the first position 51 to the second position 52 is provided (not shown in the figure). A camera or laser ranging sensor is installed on the side or top of the detection box 1, aligned with the movement path of the counterweight 5, and recognizes the real-time position of the counterweight 5. When the counterweight 5 enters the first position 51, it is marked as the starting point of timing, and when it reaches the second position 52, it is marked as the end point. The time difference between the two is calculated.

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

[0042] The traditional rotary viscometer relies on motor drive and torque sensor, and needs to wait for steady-state measurement data, which takes a long time. However, this device drives the rotor 6 by the free fall of the counterweight 5, only needs to record the movement time of the counterweight to quickly calculate the viscosity, which meets the real-time demand in the production process, such as the key stage of resin synthesis reaction (such as pre-polymerization, early gelation), to quickly judge the reaction progress, so as to timely adjust the temperature or add additives, avoid batch abnormalities caused by delayed detection, and ensure product quality stability. In addition, this device has simple structure and low maintenance cost, which is suitable for large-scale production application and effectively improves production efficiency.

[0043] Example Two:

[0044] Due to the implementation process, the rotor 6 specification change, and the different stages of resin production process need to adjust the weight of the counterweight 5 to match different viscosity range, the device design should consider the convenient replacement mechanism, the replacement of the rotor 6 is often unavoidable, and the operation is simple, but the replacement of the counterweight 5 is more cumbersome, and the counterweight 5 is prone to errors (damage, adhesion of foreign matter, etc.) when replaced, and the counterweight 5 is usually arranged in the detection box 1 and is not convenient to replace, so a more convenient way is proposed to solve the above problems, in particular, please refer to Figure 2 Figure 5 , the pulley 22 is rotatably installed in the detection box 1 through the second rotating shaft 23, the second rotating shaft 23 is fixedly connected with the bracket 24, as shown in Figure 3 , the bracket 24 is L-shaped, the other end of the bracket 24 is fixedly connected with the sliding rail 25, the sliding rail 25 is fixedly connected with the guide rod 26, the guide rod 26 is slidably connected with the counterweight block, wherein the direction of the counterweight block sliding along the guide rod 26 is the first direction 54;

[0045] The sliding rail 25 can rotate around the rotation axis 2 of the pulley 22, it should be understood that the position of the sliding rail 25 rotation defines the direction of the counterweight block movement, which is the current first direction 54, that is, the specific position of the first direction 54 changes according to the rotation of the sliding rail 25;

[0046] As shown in Figure 3 , with the change of the position of the sliding rail 25 (the first direction 54), the pulling force of the counterweight 5 on the traction rope 4 under the action of gravity is also changed, the greater the angle of the sliding rail 25 rotating from the vertical direction, the smaller the effective force acting on the traction rope 4, at this time, the force driving the rotation of the rotating shaft 2 is also smaller, which also indirectly changes the weight of the counterweight 5, thereby changing the actual pulling force of the traction rope 4 without changing the weight of the counterweight 5 itself;

[0047] The sliding connection between the guide rod 26 and the counterweight block can be a linear ball bearing or a lubricated material sliding bushing (such as graphite material with low friction coefficient), which is prior art and will not be described in detail here.

[0048] In this embodiment, the rotation angle (rotation from the vertical direction) of the sliding rail 25 is 0°-45°, when the rotation angle is 0°, the sliding rail 25 is arranged along the vertical direction, it should be noted that the rotation angle should not be too large, otherwise the friction between the counterweight 5 and the guide rod 26 will be large (the radial component of the gravity of the counterweight 5 acting on the guide rod 26 increases), which is easy to cause the traction force of the traction rope 4 to be insufficient, and the counterweight block may be temporarily stalled during use, affecting the detection result, usually the rotation angle is not more than 45°, Figure 3 ​The state diagram of the slide rail 25 at 45° is shown in the middle.

[0049] In the embodiment, a sensor for detecting the position of the counterweight 5 is installed on the slide rail 25, which is set in a manner corresponding to the first position 51 and the second position 52, so that the movement of the counterweight 5 is recorded during the movement;

[0050] It should be noted that the movement of the counterweight 5 can also be recorded within a certain time, and the distance moved within a certain time is recorded (the distance sensor is set in this way), and a preliminary judgment is made by recording the distance, for example, if the distance is short within a unit of time, it indicates that the viscosity of the resin system is high, and vice versa. In some environments that limit the detection time during production, this method can also be used to preliminarily judge the viscosity of the system.

[0051] In the embodiment, the second rotating shaft 23 is connected to the second driving member 8 for driving the rotation thereof;

[0052] In the embodiment, the second driving member 8 can be manually adjusted, for example, Figure 3 As shown, one end of the second rotating shaft 23 is connected to a worm gear 81, one side of the worm gear 81 is meshingly connected to a worm shaft 82, one end of the worm shaft 82 penetrates the detection box 1 and is rotatably connected to the inner wall of the detection box 1, and the end of the worm shaft 82 is connected to a knob 83. By rotating the knob 83, the worm shaft 82 is driven to rotate, and in turn the worm gear 81 and the second rotating shaft 23 are driven to rotate. The self-locking action of the worm gear 81 and the worm shaft 82 ensures the stability of the adjusted angle, avoids errors caused by external vibration, and realizes accurate adjustment of the rotation angle of the slide rail 25.

[0053] In the embodiment, another specific example of the second driving member 8 is provided (not shown in the figure), which 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, accurate adjustment of the rotation angle of the slide rail 25 is realized.

[0054] It should be noted that in the setting of the first embodiment, the extension length of the traction rope 4 will change when the slide rail 25 rotates. During the angle adjustment process, the initial state of the rotating shaft 2 can be adjusted by rotating the second bevel gear 72 to make the traction rope 4 in a suitable tension state, ensure the smooth movement of the counterweight 5, avoid detection errors caused by the slack or tightness of the traction rope 4, and at the same time, when the second bevel gear 72 is rotated to align the interval part 73 with the first bevel gear 71, the number of rotations of the rotating shaft 2 can make the counterweight 5 rise to the preset height.

[0055] Certain exemplary embodiments of the present application have been described above by way of illustration, and it is to be understood that various modifications will become apparent to those skilled in the art without departing from the spirit and scope of the application. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature rather than restrictive.

Claims

1. An epoxy resin viscosity detection device characterized by comprising: The utility model provides a detection box (1), detection box (1) one side rotatory connection has rotation axis (2), the rotation axis (2) fixedly installed have winding drum (3) on, winding drum (3) are connected with the towrope (4) on, the towrope (4) are connected with counterweight (5) through pulley (22), when counterweight (5) moves along the first direction (54) under the action of dead weight, can drive rotation axis (2) and rotate, and when counterweight (5) moves, first position (51) and second position (52) are recorded time difference value by data acquisition mechanism (53), the rotation axis (2) one end detachable connection rotor (6), when detecting, the rotation axis (2) along vertical direction is arranged and makes rotor (6) immerse in resin, The rotation axis (2) is connected with the first driving part (7) for driving the rotation thereof, wherein the first driving part (7) drives the rotation axis (2) to rotate to the winding drum (3) to wind the towrope (4), to make the counterweight (5) rise to the preset height and then stop, and then the first driving part (7) is disconnected with the rotation axis (2), so that the rotation axis (2) is in the free rotation state; The first driving part (7) comprises a first helical gear (71) and a second helical gear (72), the first helical gear (71) is fixedly connected with the surface of the rotation axis (2), the second helical gear (72) has a tooth surface discontinuous interval (73), when the first helical gear (71) is located at the interval, the meshing with the second helical gear (72) is released and the first helical gear (71) can rotate freely; The first direction (54) is provided with a sliding rail (25), the sliding rail (25) can rotate around the rotation axis (2) of the pulley (22), the sliding rail (25) is fixedly connected with a guide rod (26), and the guide rod (26) is slidably connected with the counterweight block, wherein the direction of the guide rod (26) when the counterweight block slides is the first direction (54).

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

3. The epoxy resin viscosity detection device according to claim 1, characterized in that, The angle of the sliding rail (25) rotating from the vertical direction is 0°-45°.

4. The epoxy resin viscosity detection device according to claim 3, characterized in that, The pulley (22) is rotatably installed in the detection box (1) through a second rotating shaft (23), the second rotating shaft (23) is fixedly connected with a support (24), and the other end of the support (24) is fixedly connected with the sliding rail (25).

5. The epoxy resin viscosity detection device according to claim 4, characterized in that, The second rotating shaft (23) is connected with the second driving part (8) for driving the rotation thereof.

6. The epoxy resin viscosity detection device according to claim 5, wherein One end of the second rotating shaft (23) is connected with a worm wheel (81), one side of the worm wheel (81) is meshingly connected with a worm (82), one end of the worm (82) penetrates through the detection box (1) and is rotatably connected with the inner wall of the detection box (1), and the end portion of the worm (82) is connected with a knob (83).

7. The epoxy resin viscosity detection device according to claim 1, wherein The rotation axis (2) is fixed in the detection box (1) through a rotating frame (21), and the rotating frame (21) is rotatably connected with the rotation axis (2).

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