Rubber plasticity tester

Abstract

The utility model discloses a rubber plasticity tester, which relates to the technical field of plasticity testers, and comprises a constant-temperature box used for providing a stable test temperature environment, a heating device and a first temperature sensor are arranged in the constant-temperature box, the heating device is used for heating air in the constant-temperature box, and the first temperature sensor is used for detecting the temperature of the air in the constant-temperature box; the first temperature sensor is used for monitoring the temperature in the constant-temperature box in real time; the lifting mechanism is installed on the top of the inner side of the constant-temperature box, the lifting mechanism comprises a driving motor, a transmission part and a pressurizing heavy hammer connected with the transmission part, and the driving motor drives the pressurizing heavy hammer to do lifting motion in the vertical direction through the transmission part; the workbench is arranged in the constant-temperature box and located below the pressurizing heavy hammer, and the workbench is parallel to the working face of the pressurizing heavy hammer; the constant-temperature box is of a double-layer box body structure; and the accuracy and the reliability of test data are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plasticity tester, concretely is a rubber plasticity tester. BACKGROUND

[0002] As an important industrial material, rubber has a wide range of applications in many fields, and its plasticity is one of the key factors affecting the quality and performance of rubber products. Therefore, accurate measurement of the plasticity of rubber is of great significance to the production, processing and product development of rubber, and the rubber plasticity tester has emerged as the times require.

[0003] In the research and production process of rubber materials, temperature has a crucial influence on the test results of rubber plasticity. The traditional rubber plasticity tester has obvious shortcomings in temperature control. Early testers often only have basic heating devices to maintain the temperature in the incubator, which exposes many drawbacks when faced with complex actual use scenarios. For example, when the laboratory environment temperature changes greatly, especially in high temperature environments, the incubator of the traditional tester is difficult to resist the influx of external heat, causing the internal temperature to deviate from the preset test temperature range, seriously affecting the accuracy and reliability of the test data. Moreover, during the continuous operation of the tester, heat is generated when the rubber sample is deformed under pressure, and due to the lack of effective heat dissipation mechanism, the heat will accumulate in the box, causing the temperature to gradually rise, further interfering with the accurate determination of the plasticity of rubber.

[0004] In addition, in actual experimental operations, it is often necessary to quickly adjust the temperature of the incubator after completing a test, such as after the experiment is completed, the temperature needs to be quickly reduced to room temperature in order to carry out subsequent sample replacement and equipment maintenance, or quickly switched to the next experimental condition with different temperature requirements to simulate the plasticity performance of rubber under diversified actual working conditions. However, the temperature regulation efficiency of the traditional tester is low, which cannot meet the demand of rapid temperature change, greatly increasing the experimental waiting time and reducing the overall experimental efficiency, seriously restricting the research and development progress and production efficiency of rubber materials.

[0005] From the overall structural design, the traditional tester also has many defects. The heat insulation performance of the incubator is not good, and heat is easily lost through conduction, convection and radiation of the box, which not only causes waste of energy, but also makes it difficult to maintain the temperature in the box within the required precision range. At the same time, the temperature control means of the traditional tester is single, and cannot realize precise dynamic adjustment of the temperature, which is difficult to adapt to the strict requirements of modern rubber industry for high-precision test environment.

[0006] With the continuous development of the rubber industry and the continuous progress of technology, the market puts forward higher and higher standards for the quality and performance of rubber products. The existing rubber plasticity tester has been difficult to meet the urgent needs of high precision, high efficiency and multifunctional testing. Therefore, developing a new type of rubber plasticity tester with advanced temperature control technology, optimized structure design and fast and accurate temperature regulation has become a key problem to be solved in the field of rubber testing, which has important practical significance for promoting technological innovation and product quality improvement of the rubber industry. Utility model content

[0007] The utility model aims at providing a technical scheme which can solve the above problems.

[0008] A rubber plasticity tester, comprising:

[0009] A thermostat is used to provide a stable test temperature environment, a heating device and a first temperature sensor are arranged inside the thermostat, the heating device is used to heat the air in the thermostat, and the first temperature sensor is used to monitor the temperature in the thermostat in real time.

[0010] A lifting mechanism is installed on the top of the inside of the thermostat, the lifting mechanism comprises a driving motor, a transmission component and a pressurized weight connected with the transmission component, the driving motor drives the pressurized weight to move up and down in the vertical direction through the transmission component.

[0011] A workbench is arranged inside the thermostat and below the pressurized weight, and the working surface of the workbench is parallel to the working surface of the pressurized weight.

[0012] A displacement measuring device is fixedly installed on the top of the outside of the thermostat, and the displacement measuring device is used to measure the displacement change of the pressurized weight during the pressure application process.

[0013] The thermostat is a double-layer box structure, comprising an outer box and an inner box, and a vacuum heat insulation layer and a circulating water cooling pipeline are arranged between the outer box and the inner box.

[0014] As a further scheme of the utility model, the vacuum heat insulation layer is tightly attached between the inner and outer layers.

[0015] As a further scheme of the utility model, the circulating water cooling pipeline is spirally and uniformly distributed between the vacuum heat insulation layer and the inner box.

[0016] The circulating water cooling pipeline has a water outlet and a water inlet, the water inlet is located at the bottom of one side of the thermostat and is connected with an external cooling water source through a connecting pipe, and the water outlet is located at the top of the opposite side of the thermostat and is communicated with an external drainage system through a pipeline.

[0017] As a further scheme of the utility model: the connecting pipe connected with the external cooling water source at the water inlet is provided with a flow regulating valve;

[0018] Second temperature sensors are arranged at the water inlet and the water outlet.

[0019] As a further scheme of the utility model: a control system is further included, and the control system is electrically connected with the heating device, the first temperature sensor, the driving motor, the displacement measuring device, the flow regulating valve and the second temperature sensor respectively.

[0020] The control system further includes a display panel located on the surface of the outer box body.

[0021] As a further scheme of the utility model: the vacuum heat insulation layer is uniformly provided with a grid-shaped support structure.

[0022] Compared with the prior art, the utility model has the beneficial effects as follows:

[0023] The combination of the vacuum heat insulation layer and the circulating water cooling pipeline effectively solves the problems that the temperature of the traditional test instrument is easily affected by the external environment and the internal heat accumulation cannot be effectively dissipated, so that the temperature in the thermostat can be accurately and stably stabilized in the preset range, the accuracy and reliability of the test data are greatly improved, and stable and reliable temperature conditions can be provided for the rubber plasticity test in the high-temperature environment or the long-time test process; and different requirements for the temperature in the experiment process can also be quickly responded and met, for example, after the experiment is completed, the temperature can be rapidly reduced to room temperature by using the circulating water cooling pipeline, or the experiment condition of other specific temperature requirements can be quickly switched to, so that the experiment efficiency is greatly improved, the experiment waiting time is reduced, and the research and development process and the production efficiency of the rubber material are accelerated.

[0024] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0026] Fig. 1 It is the structural schematic diagram of the utility model;

[0027] Fig. 2is the internal structure schematic view of the constant temperature box in the utility model;

[0028] Fig. 3 is the section structure schematic view of the outer box body and the inner box body cooperation in the utility model.

[0029] The reference signs and names in the drawing are as follows:

[0030] 1, constant temperature box; 2, heating device; 3, first temperature sensor; 4, drive motor; 5, transmission component; 6, pressurized weight; 7, workbench; 8, displacement measuring device; 9, outer box body; 10, inner box body; 11, vacuum heat insulation layer; 12, circulating water cooling pipeline; 13, water outlet; 14, water inlet; 15, display panel; 16, support structure. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] Please refer to Figs. 1-3 In the embodiments of the utility model, a rubber plasticity tester comprises:

[0033] A constant temperature box 1 is used for providing a stable test temperature environment, and a heating device 2 and a first temperature sensor 3 are arranged inside the constant temperature box 1. The heating device 2 is used for heating air in the constant temperature box 1, and the first temperature sensor 3 is used for monitoring the temperature in the constant temperature box 1 in real time.

[0034] A lifting mechanism is installed on the top of the inner side of the constant temperature box 1. The lifting mechanism comprises a drive motor 4, a transmission component 5 and a pressurized weight 6 connected with the transmission component 5. The drive motor 4 drives the pressurized weight 6 to make lifting movement in the vertical direction through the transmission component 5.

[0035] A workbench 7 is arranged inside the constant temperature box 1 and below the pressurized weight 6. The work surface of the workbench 7 is parallel to the work surface of the pressurized weight 6.

[0036] A displacement measuring device 8 is fixedly installed on the top of the outer side of the constant temperature box 1. The displacement measuring device 8 is used for measuring the displacement change of the pressurized weight 6 in the pressure process.

[0037] The thermostat 1 is a double-layer box structure, comprising an outer box 9 and an inner box 10, and a vacuum heat insulation layer 11 and a circulating water cooling pipeline 12 are arranged between the outer box 9 and the inner box 10.

[0038] In the technical scheme of the utility model, the thermostat 1 adopts a double-layer box structure, and the vacuum heat insulation layer 11 arranged between the outer box 9 and the inner box 10 greatly reduces the heat transfer through conduction, convection and radiation by utilizing the vacuum environment, reduces the interference of the external environment temperature on the test temperature environment in the box, and improves the temperature stability.

[0039] The circulating water cooling pipeline 12 is designed to cope with the situation that the temperature in the box is too high, for example, when the laboratory environment temperature is too high or too much heat is generated due to the compression of the rubber sample, the excess heat is taken away by circulating water, thereby cooperating with the heating device 2 to ensure that the temperature in the box is always stable within the required test temperature range, meeting the accurate temperature requirement for testing the plasticity of rubber.

[0040] The heating device 2 adjusts the heating power through the control system according to the real-time monitoring data of the first temperature sensor 3, realizes accurate control of the temperature in the box, and maintains a stable test temperature environment, wherein the heating device 2 can adopt an electric heating element (such as a resistance wire), which generates heat and converts electrical energy into heat energy to heat the air in the box after being electrified.

[0041] The lifting mechanism is installed on the inner top of the thermostat 1, and the driving motor 4 drives the pressurizing weight 6 to move up and down in the vertical direction through the transmission component 5. This design can stably apply pressure to the rubber sample placed on the workbench 7 by the pressurizing weight 6, ensuring the uniformity and stability of the pressure during the test. The lifting mechanism can adopt a ball screw transmission, and the balls between the screw rod and the nut roll in the spiral raceway, converting the rotary motion of the motor into the linear motion of the nut to stably lift the pressurizing weight 6. Other transmission components 5 can also be used, which are not limited here.

[0042] The workbench 7 is arranged inside the thermostat 1 and parallel to the working surface of the pressurizing weight 6, ensuring that the rubber sample is uniformly stressed during the compression process, which is conducive to accurately measuring the plasticity change of the rubber under compression.

[0043] The displacement measuring device 8 is fixedly installed on the outer top of the thermostat 1 and can accurately measure the displacement change of the pressurizing weight 6 during the compression process. By monitoring the displacement of the pressurizing weight 6, the deformation of the rubber sample is indirectly reflected, so as to obtain the related data of the plasticity of the rubber. The displacement measuring device 8 can be a dial indicator, and the measuring rod inside the dial indicator is in contact with the pressurizing weight 6. When the pressurizing weight 6 moves, the measuring rod moves accordingly.

[0044] In summary, the combination of the vacuum insulation layer 11 and the circulating water cooling pipeline 12 effectively solves the problems of the temperature of the traditional test instrument being easily affected by the external environment and the internal heat accumulation being unable to be effectively dissipated, so that the temperature in the thermostat 1 can be accurately and stably kept in the preset range, greatly improving the accuracy and reliability of the test data. Whether in a high-temperature environment or in a long-time test process, the rubber plasticity test can be provided with stable and reliable temperature conditions. Moreover, different requirements for temperature in the experimental process can be quickly responded and met, for example, after the experiment is completed, the temperature can be quickly reduced to room temperature by using the circulating water cooling pipeline 12, or the experimental conditions of other specific temperature requirements can be quickly switched to, greatly improving the experimental efficiency, reducing the experimental waiting time, and accelerating the research and development process and production efficiency of the rubber material.

[0045] In the embodiment of the utility model, the vacuum insulation layer 11 is closely attached between the inner layer and the outer layer.

[0046] The design of close attachment aims to minimize the possible air gap between the inner box body 10 and the outer box body 9, thereby reducing the possibility of heat conduction through air; after the air between the inner box body 10 and the outer box body 9 is as much as possible to be excluded, the heat conduction path is effectively blocked, because air is a poor conductor of heat, reducing the air layer can significantly inhibit the transfer of heat.

[0047] From the perspective of structural stability, the closely attached vacuum insulation layer 11 can better work with the inner box body 10 and the outer box body 9, maintaining the integrity and stability of the overall structure when subjected to external pressure (such as atmospheric pressure) and internal stress (such as thermal stress due to temperature changes), preventing the vacuum insulation layer 11 from loosening, displacing or deforming, and thus ensuring the durability and reliability of its thermal insulation performance.

[0048] In the embodiment of the utility model, the circulating water cooling pipeline 12 is spirally and uniformly distributed between the vacuum insulation layer 11 and the inner box body 10.

[0049] The circulating water cooling pipeline 12 has a water outlet 13 and a water inlet 14, the water inlet 14 is located at the bottom of one side of the thermostat 1, connected with the external cooling water source through the connecting pipe, and the water outlet 13 is located at the top of the opposite side of the thermostat 1, communicated with the external drainage system through the pipeline.

[0050] The spiral design can make the circulating water have a larger contact area with the inner box 10 in a limited space, thereby more efficiently absorbing the heat emitted by the inner box 10, when the water flows through the spiral pipeline, the heat exchange time of the water with the inner box 10 per unit length is prolonged, and the heat transfer is more sufficient; the distribution mode can also keep the water flow speed in the circulating water cooling pipeline 12 relatively stable, avoid the local flow speed being too fast or too slow, ensure that the cooling effect of the entire surface of the inner box 10 is uniform and consistent, and be beneficial to maintaining the uniformity of the temperature field in the thermostat 1.

[0051] The water inlet 14 is located at the bottom of one side of the thermostat 1, and the natural gravity of water is used to make the cooling water flow fill the entire circulating water cooling pipeline 12 from bottom to top, so that the pipeline is always filled with water, and the cavitation phenomenon is avoided, and the cooling effect and the stability of the water flow are affected; the water outlet 13 is located at the top of the opposite side, so that the hot water after heat exchange can naturally rise and flow out, and the hot water can be discharged in time, and meanwhile, the natural convection of the water in the pipeline is promoted, and the heat exchange efficiency is further improved.

[0052] In the utility model embodiment, the flow regulating valve (not shown) is installed on the connecting pipe connected with the external cooling water source.

[0053] Second temperature sensors (not shown) are arranged at the water inlet 14 and the water outlet 13.

[0054] The flow regulating valve adjusts the flow of the cooling water entering the circulating water cooling pipeline 12 through the connecting pipe by changing the opening degree of the valve, and based on the fluid mechanics principle, when the opening degree of the valve is reduced, the water flow passage cross-sectional area becomes small, the water flow resistance increases, and thus the flow is reduced; on the contrary, when the opening degree of the valve is increased, the flow is increased; through the accurate control of the control system on the flow regulating valve, the cooling water amount can be dynamically adjusted according to the real-time temperature in the thermostat 1, so as to realize accurate temperature regulation.

[0055] The second temperature sensors arranged at the water inlet 14 and the water outlet 13 are used to monitor the water temperature entering and leaving the circulating water cooling pipeline 12 in real time, the second temperature sensors use the thermoelectric effect or other temperature sensitive principles to convert the change of the water temperature into an electric signal and feed back to the control system, the control system can understand the initial state of the external cooling water source according to the water inlet temperature, and can judge the heat taken away by the circulating water after heat exchange with the inner box 10 according to the water outlet temperature, and then comprehensively consider other parameters such as the temperature in the box to intelligently control the flow regulating valve, so as to maintain the temperature stability in the thermostat 1.

[0056] The utility model discloses an embodiment further includes control system, control system is electric connection with heating device 2, first temperature sensor 3, drive motor 4, displacement measuring device 8, flow regulating valve and second temperature sensor respectively,

[0057] Among them, the control system further includes the display panel 15 located at the surface of the outer box 9.

[0058] Through the design, the high degree of automation operation of rubber plasticity testing instrument is realized, the influence of human factors on test results is reduced, and the operator only needs to set test parameters such as temperature, pressure, time on the interface (i.e. at the display panel 15) of the control system, so that the control system can automatically coordinate the operation of each component and accurately control each link in the test process.

[0059] In the embodiment of the utility model, the vacuum heat insulation layer 11 is internally and uniformly distributed with a grid-shaped support structure 16.

[0060] The grid-shaped support structure 16 is uniformly distributed inside the vacuum heat insulation layer 11, and the design is based on the support and compression resistance principle in material mechanics. The grid-shaped structure can evenly disperse the external pressure (such as atmospheric pressure) received to the entire vacuum heat insulation layer 11 area. When external pressure acts on the vacuum heat insulation layer 11, the grid nodes and lines of the support structure 16 bear the pressure through their rigidity and strength, and transmit and disperse the force in various directions of the grid, avoiding the collapse or deformation of the vacuum heat insulation layer 11 due to excessive local stress, thereby maintaining the overall shape of the vacuum heat insulation layer 11 and the internal vacuum environment.

[0061] The support structure 16 is usually made of materials with certain strength, low thermal conductivity and high temperature resistance, such as ceramic fiber or special alloy, etc. These materials can ensure sufficient support force while not significantly increasing the conduction of heat through the support structure 16, so as to minimize the impact on the heat insulation performance of the vacuum heat insulation layer 11.

[0062] Among them, the vacuum heat insulation layer 11 can be a ceramic fiber vacuum plate structure, an aerogel felt vacuum packaging structure, etc.

[0063] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

Claims

1. A rubber plasticity tester characterized by comprising: The utility model relates to a constant temperature box for providing stable test temperature environment, which is internally provided with a heating device for heating air in the constant temperature box and a first temperature sensor for monitoring temperature in the constant temperature box in real time. A lifting mechanism is installed on the top of the inside of the constant temperature box, which comprises a driving motor, a transmission component and a pressurized weight connected with the transmission component. The driving motor drives the pressurized weight to move up and down in the vertical direction through the transmission component. A workbench is arranged inside the constant temperature box and below the pressurized weight, and the working surface of the workbench is parallel to that of the pressurized weight. A displacement measuring device is fixedly installed on the top of the outside of the constant temperature box, which is used to measure the displacement change of the pressurized weight during pressure application. The constant temperature box has a double-layer box structure, which comprises an outer box and an inner box, and a vacuum heat insulation layer and a circulating water cooling pipeline are arranged between the outer box and the inner box.

2. A rubber plasticity tester according to claim 1, characterised in that The vacuum heat insulation layer is tightly attached between the inner and outer layers.

3. A rubber plasticity tester according to claim 1 or 2, characterised in that, The circulating water cooling pipeline is spirally and uniformly distributed between the vacuum heat insulation layer and the inner box. The circulating water cooling pipeline has a water outlet and a water inlet.

4. A rubber plasticity tester according to claim 3, wherein The water inlet is located at the bottom of one side of the constant temperature box and is connected with an external cooling water source through a connecting pipe. The connecting pipe is provided with a flow regulating valve.

5. A rubber plasticity tester according to claim 4, wherein Second temperature sensors are arranged at the water inlet and the water outlet. The utility model also comprises a control system, which is electrically connected with the heating device, the first temperature sensor, the driving motor, the displacement measuring device, the flow regulating valve and the second temperature sensors.

6. A rubber plasticity tester according to claim 2, wherein The control system further comprises a display panel on the surface of the outer box. The vacuum heat insulation layer is uniformly provided with a grid-shaped support structure.

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