A cement mixing and curing homogenization monitoring method and device based on torque sensing

Abstract

The application relates to a cement mixing and solidifying homogenization monitoring method and device based on torque sensing, wherein a torque value in a cement mixing process is acquired in real time, the torque value is used for indicating a moment of force generated by the cement on a rotating stirring shaft; a stirring torque discrete coefficient is determined based on the torque value in a first time period; in the case that the stirring torque discrete coefficient is smaller than a preset coefficient, a derivative value of the stirring torque with respect to time is determined based on the torque value in a second time period, the second time period is after the first time period; in the case that the derivative value of the stirring torque with respect to time is smaller than a preset derivative value, cement fluid viscosity is determined based on the derivative value of the stirring torque with respect to time and the torque value; and cement solidification homogenization results are determined based on the stirring torque discrete coefficient and the cement fluid viscosity. The application realizes a method for determining cement solidification quality based on online monitoring, so that the technical effect of effectively controlling the cement solidification quality can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive waste treatment equipment, and particularly relates to a cement mixing and solidification homogenization monitoring method and device based on torque sensing. BACKGROUND

[0002] A large amount of low and medium level radioactive waste is inevitably generated in the production and operation of the nuclear industry. The cement solidification technology can mix radioactive waste liquid or radioactive solid waste with cement, water, additives and the like in a certain proportion, harden into a safe and stable waste solidification body at room temperature, and then be stored, which is a common method for radioactive waste treatment, and has the advantages of simple process, high safety, low investment and operation cost and the like.

[0003] In order to ensure the performance of the cement solidification body, the mixing method is often used in the solidification process to fully mix the waste and the cement and other additives, so that the materials in the system tend to be homogenized. At present, although most of the domestic cement solidification mixing equipment adopts computer automatic control method to reduce the radiation risk of personnel, the judgment of mixing homogeneity is mostly controlled by the time obtained by experience, and there is a lack of online monitoring means, so it is difficult to control the cement solidification quality.

[0004] The above problems need to be solved. SUMMARY

[0005] The present application discloses a cement mixing and solidification homogenization monitoring method and device based on torque sensing, and aims to solve the technical problems existing in the prior art.

[0006] The present application adopts the following technical scheme:

[0007] On the one hand, the present application provides a cement mixing and solidification homogenization monitoring method based on torque sensing, which comprises: acquiring torque values in real time in the cement mixing process, wherein the torque values are used to indicate the torque generated by the cement on the rotating stirring shaft; determining a stirring torque discrete coefficient based on the torque values acquired in a first time period; in the case that the stirring torque discrete coefficient is less than a preset coefficient, determining a derivative value of the stirring torque with respect to time based on the torque values in a second time period, wherein the second time period is after the first time period; in the case that the derivative value of the stirring torque with respect to time is less than a preset derivative value, determining a cement fluid viscosity based on the derivative value of the stirring torque with respect to time and the torque values; and determining a cement solidification homogenization result based on the stirring torque discrete coefficient and the cement fluid viscosity.

[0008] Optionally, the method further comprises: constructing a data set of the torque values in time sequence based on the torque values and time points of the first time period; and determining a dispersion coefficient of the torque values in the first time period based on the data set, wherein the dispersion coefficient is used to indicate a dispersion degree of the torque values in time.

[0009] Optionally, before the determining the derivative value of the stirring torque with respect to time based on the torque values in the second time period when the stirring torque dispersion coefficient is less than the preset coefficient, the method further comprises: dividing the solidification and homogenization process of the cement stirring into a non-steady state phase and a metastable state phase, wherein the non-steady state phase is used to indicate that the cement stirring has not reached a uniform state, and the metastable state phase is used to indicate that the cement stirring is in an initial phase of reaching a uniform state; and when the stirring torque dispersion coefficient in each of the first time periods is less than the preset coefficient, stopping the iteration and entering the metastable state phase, wherein the solidification and homogenization process of the cement stirring in each of the first time periods is in the non-steady state phase.

[0010] Optionally, the determining the derivative value of the stirring torque with respect to time based on the torque values in the second time period when the stirring torque dispersion coefficient is less than the preset coefficient comprises: constructing a time-continuous torque value change curve based on the torque values and time points of the second time period corresponding to the torque values in time sequence in the second time period when the metastable state phase is in the second time period; and determining the derivative value of the stirring torque with respect to time by deriving the torque value change curve based on the time points of the second time period.

[0011] Optionally, the determining the cement fluid viscosity based on the derivative value of the stirring torque with respect to time and the torque values when the derivative value of the stirring torque with respect to time is less than a preset derivative value comprises: constructing a time-continuous torque value change curve based on the torque values and time points of the second time period corresponding to the torque values in time sequence in the second time period; determining a linear regression coefficient of the second time period based on the torque value change curve and the derivative value of the stirring torque with respect to time; determining an intercept of the torque value change curve based on the linear regression coefficient; and determining the cement fluid viscosity based on the intercept.

[0012] According to another aspect of the embodiments of the present application, a torque sensing device for cement mixing, curing and homogenizing monitoring is also provided, comprising: a torque sensor for acquiring torque values in the cement mixing process; a coupling comprising an upper coupling and a lower coupling, one end of the upper coupling being connected with the torque sensor, the other end of the upper coupling being connected with a rotating motor gear shaft, one end of the lower coupling being connected with the torque sensor, the other end of the lower coupling being connected with a mixing shaft, the coupling being used for transmitting the mixing intensity of the mixing shaft to the torque sensor; a bearing seat arranged at the connection between the torque sensor and the coupling, used for supporting the coupling; and a bearing sleeve arranged outside the torque sensor, used for limiting the rotation space of the torque sensor.

[0013] Optionally, the torque sensing device further comprises: an elastic retaining ring arranged at the connection between the coupling and the torque sensor and installed in the bearing seat, used for limiting the axial displacement of the torque sensor.

[0014] Optionally, the torque sensing device further comprises: a dust cover installed outside the bearing sleeve, the dust cover being provided with a plurality of heat dissipation holes for heat dissipation of the torque sensor.

[0015] According to another aspect of the embodiments of the present application, a torque sensing system for cement mixing, curing and homogenizing monitoring is also provided, comprising: a metal resistance strain gauge for acquiring torque signals in the cement mixing process; a bridge circuit connected with the metal resistance strain gauge, used for causing the change of the bridge resistance based on the torque signals and generating a voltage signal; an amplification circuit connected with the bridge circuit, used for amplifying the voltage signal; an analog-digital conversion module connected with the amplification circuit, used for converting the voltage signal into a digital signal; and a single-chip microcomputer connected with the analog-digital conversion module, used for obtaining torque values based on the digital signal.

[0016] Optionally, the torque sensing system further comprises: an LCD display screen connected with the single-chip microcomputer, used for displaying the torque values; and a serial communication connected with the single-chip microcomputer, used for transmitting the torque values to a curing and homogenizing monitoring module.

[0017] The technical solutions adopted by the present application can achieve at least one of the following beneficial effects:

[0018] In the embodiment of the present application, the torque value in the cement mixing process is acquired in real time, wherein the torque value is used to indicate the moment of force generated by the cement on the rotating stirring shaft; the stirring torque dispersion coefficient is determined based on the torque value acquired in the first time period; in the case that the stirring torque dispersion coefficient is less than the preset coefficient, the derivative value of the stirring torque with respect to time is determined based on the torque value in the second time period, wherein the second time period is after the first time period; in the case that the derivative value of the stirring torque with respect to time is less than the preset derivative value, the cement fluid viscosity is determined based on the derivative value of the stirring torque with respect to time and the torque value; and the cement solidification homogenization result is determined based on the stirring torque dispersion coefficient and the cement fluid viscosity, so as to achieve the purpose of determining the cement fluid viscosity based on the torque value, thereby obtaining the cement solidification homogenization result, and the technical effect of determining the cement solidification quality based on the online monitoring method is realized, and the technical problem that the judgment of the mixing homogeneity is mostly dependent on the experience-derived time for control, and the online monitoring method is lacked and the cement solidification quality is difficult to control is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, which constitutes a part of the present application. The schematic embodiments of the present application and the description and explanation thereof do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 is a flow chart of a cement mixing solidification homogenization monitoring method based on a torque sensor in the embodiment 1 of the present application;

[0021] Figure 2 is a stage division diagram of a cement mixing solidification homogenization monitoring method based on a torque sensor in the embodiment 1 of the present application;

[0022] Figure 3 is a flow chart of an optional cement mixing solidification homogenization monitoring method based on a torque sensor in the embodiment 2 of the present application;

[0023] Figure 4 is a split structure schematic diagram of a torque sensor device for cement mixing solidification homogenization monitoring in the embodiment 3 of the present application;

[0024] Figure 5 is a combination structure schematic diagram of a torque sensor device for cement mixing solidification homogenization monitoring in the embodiment 3 of the present application;

[0025] Figure 6 is an electronic element connection diagram of a torque sensor system for cement mixing solidification homogenization monitoring in the embodiment 4 of the present application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Upper coupling; 2. Upper bearing housing; 3. Elastic retaining ring; 4. Torque sensor; 5. Lower bearing housing; 6. Lower coupling; 7. Bearing sleeve; 8. Cover plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0030] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention will be explained below:

[0032] Torque is a physical quantity that describes the rotational effect of a force on an object. In cement curing and mixing, torque can reflect the torque generated by the cement on the rotating mixing shaft.

[0033] Cement hardening refers to the hydration reaction that occurs when cement and water are mixed. The mineral components in cement clinker react with water to form hydration products, such as hydrated calcium silicate and hydrated calcium aluminate. These hydration products gradually harden, giving concrete or mortar strength.

[0034] Homogenization refers to the state in which the components are evenly distributed in the mixing system during the cement mixing process.

[0035] To solve the problems in the prior art, the embodiment of the present application provides a cement mixing and solidifying homogenization monitoring method and device based on torque sensing.

[0036] Embodiment 1

[0037] The embodiment provides a cement mixing and solidifying homogenization monitoring method based on torque sensing, as shown in the following table. Figure 1 Figure 1 is a flowchart of a cement mixing and solidifying homogenization monitoring method based on torque sensing in the embodiment 1 of the present application, and the method comprises the following steps.

[0038] In step S102, the torque value in the cement mixing process is acquired in real time, wherein the torque value is used to indicate the torque generated by the cement on the rotating stirring shaft.

[0039] Optionally, the torque value in the cement mixing process is acquired in real time by using a torque sensor 4, wherein one end of the torque sensor 4 is connected to a rotating motor, and the other end is connected to the stirring shaft. The rotating motor drives the stirring shaft to rotate, and the cement and the radioactive waste are uniformly mixed. In the stirring process, the cement gradually solidifies, and the stirring intensity of the stirring shaft gradually increases. The torque sensor 4 acquires the torque value transmitted by the stirring shaft, so as to determine the torque generated by the cement on the rotating stirring shaft.

[0040] In step S104, the stirring torque dispersion coefficient is determined based on the torque value acquired in the first time period.

[0041] In some preferred embodiments, the stirring torque dispersion coefficient is determined based on the torque value acquired in the first time period, which comprises: constructing a data set of the torque values in time sequence based on the torque values and the time points of the first time period; and determining the dispersion coefficient of the torque values in the first time period based on the data set, wherein the dispersion coefficient is used to indicate the dispersion degree of the torque values based on time.

[0042] Optionally, the torque values acquired in real time are divided into the first time period and the second time period in time sequence, and the first time period is before the second time period. In the first time period, the torque values are arranged in time sequence. Based on the interval of the arrangement, the dispersion degree of the torque values can be determined. The dispersion coefficient is selected to represent the dispersion degree. In the case that the dispersion coefficient is high, it indicates that the torque value changes greatly in the stirring process, and the cement is in the stage of non-uniformity. In this stage, the uniformity of the cement does not meet the requirements, and the stirring needs to be continued.

[0043] In step S106, in the case that the stirring torque dispersion coefficient is less than the preset coefficient, the derivative value of the stirring torque with respect to time is determined based on the torque value in the second time period, wherein the second time period is after the first time period.​

[0044] In some preferred embodiments, before the derivative value of the stirring torque with respect to time is determined based on the torque values in the second time period, in the case that the stirring torque dispersion coefficient is less than the preset coefficient, the method further comprises: dividing the solidification and homogenization process of the cement stirring into a non-steady state stage and a metastable state stage, wherein the non-steady state stage is used to indicate that the cement stirring has not reached a uniform state, and the metastable state stage is used to indicate that the cement stirring is in an initial stage of reaching a uniform state; in the case that there are multiple first time periods in time sequence, the stirring torque dispersion coefficients corresponding to the multiple first time periods are obtained by iteration, wherein the solidification and homogenization process of the cement stirring in the first time period is in the non-steady state stage; the iteration is stopped in time sequence until the stirring torque dispersion coefficients corresponding to the multiple first time periods are less than the preset coefficient, and the metastable state stage is entered.

[0045] Optionally, as shown in Figure 2 , Figure 2 is a stage division diagram of a cement stirring solidification and homogenization monitoring method based on torque sensing in Embodiment 1 of the present application. The stirring stage after cement feeding is divided into a non-steady state stage and a metastable state stage. The non-steady state stage refers to a period of time after cement feeding and completion of cement feeding, during which the cement in the system has not been completely mixed and participates in the solidification reaction; the metastable state stage refers to a period of time after the cement is added and stirred, during which the cement is basically mixed uniformly and participates in the solidification reaction, and initial setting begins.

[0046] Optionally, multiple first time periods are divided in time sequence, each first time period corresponds to a stirring torque dispersion coefficient, and the stirring torque dispersion coefficients are obtained by iteration in time sequence, and the division of the first time period is stopped in the case that the stirring torque dispersion coefficient is less than the preset coefficient, and the second time period is entered. It should be noted that the first time period and the second time period for collecting torque values should be longer than the rotation period of the stirring shaft (if the stirring supports revolution, it is also longer than the revolution period), which can ensure that the dispersion degree is representative, and the stirring period also needs to be adjusted according to the actual stirring speed.

[0047] In some preferred embodiments, in the case that the stirring torque dispersion coefficient is greater than the preset coefficient, the derivative value of the stirring torque with respect to time is determined based on the torque values in the second time period, which comprises: in the case of the metastable state stage, in the second time period, a time-continuous torque value change curve is constructed based on the torque values and the time points of the second time period corresponding to the torque values in time sequence; the derivative value of the stirring torque with respect to time is determined by deriving the time of the torque value change curve based on the torque value change curve based on the second time period.

[0048] Optionally, when it is determined that the cement solidification process has entered the metastable stage, i.e., the second time period, the derivative of the curvature of the torque value change curve with respect to time dM / dt in the second time period is calculated to determine the derivative value of the stirring torque with respect to time. The derivative value of the stirring torque with respect to time can represent the progress of cement solidification and homogenization. When the derivative of the torque value change curve with respect to time has approached zero and is less than the preset derivative preset value, it indicates that the homogenization is completed, i.e., the water, cement, and radioactive waste have been uniformly stirred. If the derivative of the torque value change curve with respect to time is still greater than the preset derivative preset value, it indicates that the stirring time needs to be further extended. The cement solidification and homogenization result can be substantially determined through the torque value change curve, thereby avoiding the imperfect effect of cement solidification and homogenization caused by subjective judgment.

[0049] In step S108, in a case where the derivative value of the stirring torque with respect to time is less than the derivative preset value, the cement fluid viscosity is determined based on the derivative value of the stirring torque with respect to time and the torque value.

[0050] In some preferred embodiments, in a case where the derivative value of the stirring torque with respect to time is less than the preset derivative value of the stirring torque with respect to time, the cement fluid viscosity is determined based on the derivative value of the stirring torque with respect to time and the torque value, including: in the second time period, a time-continuous torque value change curve is constructed based on the torque value and the time point of the second time period corresponding to the torque value in chronological order; a linear regression coefficient of the second time period is determined based on the torque value change curve and the derivative value of the stirring torque with respect to time; an intercept of the torque value change curve is determined based on the linear regression coefficient; and the cement fluid viscosity is determined based on the intercept.

[0051] Optionally, in a case where the derivative value of the stirring torque with respect to time is less than the derivative preset value, the cement has entered the solidification stage and gradually solidifies at this time, so the derivative value of the stirring torque with respect to time decreases, and even gradually approaches 0. In the cement solidification stage, the degree of cement solidification needs to be determined. The linear regression coefficient is obtained, wherein the linear regression coefficient is used to represent the relationship between the independent variable (stirring time) and the dependent variable (torque value) after entering the metastable state. Based on the linear regression coefficient, the intercept (intercept is torque value) on the torque value change curve is determined, and the torque value can directly represent the cement fluid viscosity. Specifically, in a case where the torque value is small, the cement fluid viscosity is low, and in a case where the torque value is large, the cement fluid viscosity is high. It should be noted that the cement viscosity can be reflected only under the same process conditions, and the rotational speed needs to be kept consistent.

[0052] In step S110, the cement solidification and homogenization result is determined based on the stirring torque dispersion coefficient and the cement fluid viscosity.

[0053] Optionally, in the case that the viscosity of the cement fluid is higher than a certain threshold value, it indicates that the cement flow state is low at this time, that is, it cannot flow, that is, it will be solidified, and at this time it is determined that the current cement solidification homogenization process is completed.

[0054] Through the above steps S102 to S110, the purpose of determining the viscosity of the cement fluid based on the torque value is achieved, so as to obtain the cement solidification homogenization result, thereby realizing the determination of the cement solidification quality based on the online monitoring means, so that the technical effect of controlling the cement solidification quality can be achieved, and the technical problem that the judgment of the mixing homogeneity is mostly relied on the experience-derived time for control, lacking online monitoring means, and being difficult to control the cement solidification quality is solved.

[0055] Embodiment 2

[0056] Based on the above embodiment and optional embodiment, the application further proposes an optional implementation, Figure 3 is a flow chart of an optional cement mixing solidification homogenization monitoring method based on a torque sensor in embodiment 2 of the application, as Figure 3 shown, the method comprises:

[0057] Step S1, based on the torque sensor 4, the real-time torque value in the mixing process is obtained.

[0058] According to the cement solidification mixing mechanism, the microcomputer system (a torque sensing system for cement mixing solidification homogenization monitoring) determines that the mixing stage after the cement is added is divided into a non-steady state stage and a metastable state stage.

[0059] Among them, the non-steady state stage refers to a period of time after the cement is added and the mixing is started, and the cement in the system has not been completely mixed and participates in the solidification reaction; the metastable state refers to a period of time after the cement is added and mixed, and the cement is basically mixed uniformly and participates in the solidification reaction, and the initial setting begins.

[0060] Step S2, the microcomputer system determines the criterion of the cement mixing stage as the dispersion degree of the torque value in the set period of time, and the value V s (M) represents the degree of cement solidification homogenization.

[0061] When the dispersion coefficient in this period of time is greater than the preset coefficient, it indicates that the torque value changes greatly in the mixing process, and the mixing stage is in the non-steady state stage, at this time the cement is being added or the cement has not been fully mixed; with the mixing, the dispersion coefficient gradually decreases, and when the dispersion coefficient in this period of time is less than the preset coefficient, it indicates that the torque value changes little in the mixing process, and the mixing stage enters the metastable state stage, at this time it has been basically mixed uniformly.

[0062] It should be noted that the determination of the preset coefficient should be based on the torque value curve obtained by pre-experiment, and the determination should be combined with artificial observation of cement solidification according to actual situation and specific process requirements.

[0063] Wherein, the first time period and the second time period for collecting torque values should be longer than the rotation period of the stirring shaft (if the stirring support revolves, it is also longer than the revolution period), to ensure that the dispersion degree is representative, and should be adjusted according to the actual stirring speed. At the same time, the first time period and the second time period should not be too long, to avoid that the cement has been solidified due to too long time, resulting in invalid determination method.

[0064] In addition, when the dispersion coefficient in the first time period is less than the preset coefficient, the torque dispersion degree change in the first time period should be measured again for two segments, and multiple records are ensured to enter the metastable state stirring uniformly.

[0065] Step S3, when it is determined that the cement solidification process has entered the metastable state, the derivative dM / dt of the slope of the torque value curve with respect to time in the second time period represents the progress of cement solidification homogenization. When the derivative of the torque value curve with respect to time has approached zero and is less than the preset derivative value, it means that the homogenization has been completed; if it has not approached zero and is still greater than the preset derivative value, it means that the stirring time needs to be prolonged.

[0066] Step S4, when the stirring stage enters the metastable state and the homogenization progress is basically completed, the torque value can to some extent reflect the rheological properties of the fluid in the current stirring field, that is, the fluid viscosity. After the microcomputer system determines that it has entered the metastable state, the linear regression coefficient of the torque value curve in the third time period is calculated, wherein the intercept value M a which can represent the fluid viscosity, and the third time period is after the second time period.

[0067] Optionally, a large number of torque values can be used as the basis for evaluating the cement solidification formula and process, and can provide a reference for real-time adjustment during cement solidification. For example, if the torque value during the process is significantly greater than the stirring torque of the final stirring fluid, it means that the viscosity of the solidified body is too large, which will prompt the overload hazard; if the torque value during the process is less than the stirring torque of the final stirring fluid for a long time, it means that the viscosity of the solidified body is small and the solidification effect has not been achieved.

[0068] Through the above steps S1 to S4, the torque values and the torque value curves during the stirring process can be collected online, and based on the proposed cement solidification homogenization monitoring method, the cement solidification homogenization degree can be judged and evaluated online, which can provide a basis for real-time adjustment of the stirring process, and has important reference significance for the quality and performance of the final cement solidified product.

[0069] Example 3

[0070] According to the embodiment of the present application, an embodiment of a torque sensing device for cement mixing and curing homogenization monitoring is also provided, as shown in Figure 4 and Figure 5 as shown, Figure 4 is a split structure schematic diagram of a torque sensing device for cement mixing and curing homogenization monitoring in the embodiment 3 of the present application, Figure 5 is a combined structure schematic diagram of a torque sensing device for cement mixing and curing homogenization monitoring in the embodiment 3 of the present application.

[0071] The torque sensing device comprises: a torque sensor 4 for acquiring torque values in the cement mixing process; a shaft coupling comprising an upper shaft coupling 1 and a lower shaft coupling 6, one end of the upper shaft coupling 1 being connected with the torque sensor 4, the other end of the upper shaft coupling 1 being connected with a rotating motor gear shaft, one end of the lower shaft coupling 6 being connected with the torque sensor 4, the other end of the lower shaft coupling 6 being connected with a mixing shaft, the shaft coupling being used for transmitting the mixing intensity of the mixing shaft to the torque sensor 4; a bearing seat being arranged at the connection between the torque sensor 4 and the shaft coupling, and being used for supporting the shaft coupling; and a bearing sleeve 7 being arranged outside the torque sensor 4, and being used for limiting the rotation space of the torque sensor 4.

[0072] Optionally, the torque sensor 4 is connected with the upper shaft coupling 1 and the lower shaft coupling 6 respectively, and is fixed integrally with the bearing seat and the bearing sleeve 7, and each part is connected and assembled in sequence along the central axis. The torque sensor 4 is a core device for acquiring torque values in the torque testing device, and a non-contact dynamic torque sensor 4 is adopted to realize high-precision torque measurement in a complex and harsh environment. The structure of the torque sensor 4 comprises a sensor frame, an upper rotating shaft and a lower rotating shaft, wherein the sensor frame is a main part of the torque sensor 4 and contains a torque measurement element, and the upper rotating shaft and the lower rotating shaft are movement units and can continuously rotate.

[0073] Optionally, the upper shaft coupling 1 is connected with the motor gear shaft and the upper rotating shaft of the torque sensor 4, the inner diameter of the upper end of the upper shaft coupling 1 is consistent with the diameter of the motor gear shaft, and the inner diameter of the lower end is consistent with the diameter of the upper rotating shaft of the torque sensor 4; the lower shaft coupling 6 is connected with the lower rotating shaft of the torque sensor 4 and the mixing paddle connecting shaft, the upper end of the lower shaft coupling 6 is consistent with the diameter of the lower rotating shaft of the torque sensor 4, and the inner diameter of the lower end is consistent with the diameter of the mixing paddle connecting shaft. In the case of ensuring that each shaft is completely centered, the upper shaft coupling 1 and the lower shaft coupling 6 are selected to be rigid shaft couplings to realize gapless transmission.

[0074] Optionally, the shaft coupling is connected by a key pin connection mode to realize positioning and fixing of each shaft, and is used for transmitting motion and torque. The inner diameter of the upper and lower shaft couplings 6 should be customized according to the outer diameter size of the motor gear shaft and the mixing shaft, and interference fit is adopted.

[0075] Optionally, the bearing seat is used to support the shaft coupling, and the bearing seat comprises an upper bearing seat 2 and a lower bearing seat 5, the upper bearing seat 2 and the lower bearing seat 5 are fixed into an integral whole through bolt connection and the bearing sleeve 7, the internal torque sensor 4 and the connecting shafts are protected from pollution and collision; the inner hole diameter of the bearing seat is equal to the corresponding outer diameter of the shaft coupling, and the shafts are centered through cooperation, and the radial displacement of the torque sensor 4 is limited.

[0076] Optionally, a polytetrafluoroethylene sealing ring is installed through the shaft coupling on the outside of the bearing seat, so as to ensure the sealing effect of the bearing seat.

[0077] Optionally, the bearing sleeve 7 is customized and processed according to the size of the torque sensor 4, and the internal cavity is a cylinder. The torque sensor 4 is fixed through the bolt of the cover plate 8 and the side wall, so as to prevent the torque sensor 4 from rotating.

[0078] In some preferred embodiments, the torque sensing device further comprises: an elastic check ring 3, which is arranged at the connecting position of the shaft coupling and the torque sensor 4 and is installed in the bearing seat, and can limit the axial displacement of the torque sensor 4.

[0079] Optionally, the elastic check ring 3 is arranged on the outer shaft ring of the side of the shaft coupling facing the torque sensor 4, and the axial displacement of the torque sensor 4 is limited through cooperation of the elastic check ring 3 and the bearing seat.

[0080] In some preferred embodiments, the torque sensing device further comprises: a dust cover, which is installed on the outside of the bearing sleeve 7, and a plurality of heat dissipation holes for heat dissipation of the torque sensor 4 are arranged on the dust cover.

[0081] Based on the above embodiment, the installation principle of a torque sensing device for cement mixing, curing and homogenization monitoring is as follows: the torque sensor 4 is placed in the bearing sleeve 7, and the torque sensor 4 is fixed through the side wall bolt. The upper shaft coupling 1 is inserted through the inner hole of the upper bearing seat 2, so that the lower flange of the upper end of the shaft coupling is tightly attached to the bearing seat, the elastic check ring 3 is sleeved on the outer ring of the lower end of the shaft coupling, and the upper shaft coupling 1 is tightly clamped by the bearing seat. The lower end of the upper shaft coupling 1 is connected and fixed with the torque sensor 4 placed in the bearing sleeve 7, and the upper bearing seat 2 and the bearing sleeve 7 are fixed through the bolt. The lower shaft coupling 6 is inserted through the inner hole of the lower bearing seat 5, the elastic check ring 3 is sleeved on the outer ring of the upper end of the shaft coupling, and the upper shaft coupling 1 is tightly clamped by the bearing seat. The upper end of the lower shaft coupling 6 is connected and fixed with the sensor placed in the bearing sleeve 7, and the lower bearing seat 5 and the bearing sleeve 7 are fixed through the bolt. Finally, the cover plate 8 is fixed on the upper surface of the bearing sleeve 7, and after the device is assembled, the motor gear shaft and the stirring paddle connecting shaft can be connected and used respectively in the subsequent process.

[0082] Through the above torque sensing device for cement mixing, curing and homogenization monitoring, the torque sensing device is stable and reliable, easy to install and disassemble, and can meet the normal use in the cement curing environment.

[0083] Embodiment 4

[0084] According to the embodiment of the present application, an embodiment of a torque sensing system for cement mixing, curing and homogenizing monitoring is also provided, as shown in Figure 6 Figure 6 is an electronic element connection diagram of the torque sensing system for cement mixing, curing and homogenizing monitoring in Embodiment 4 of the present application.

[0085] The torque sensing system comprises: a metal resistance strain gauge for acquiring a torque signal in the cement mixing process; a bridge circuit connected with the metal resistance strain gauge, which causes a change in the bridge resistance based on the torque signal to generate a voltage signal; an amplification circuit connected with the bridge circuit to amplify the voltage signal; an analog-to-digital conversion module connected with the amplification circuit to convert the voltage signal into a digital signal; and a single-chip microcomputer connected with the analog-to-digital conversion module to obtain a torque value based on the digital signal.

[0086] In some preferred embodiments, the torque sensing system further comprises: an LCD display screen connected with the single-chip microcomputer for displaying the torque value; and a serial communication connected with the single-chip microcomputer for transmitting the torque value to a curing and homogenizing monitoring module.

[0087] Optionally, the torque sensor 4 is a dynamic torque sensor 4, which comprises a metal resistance strain gauge as a sensitive element. The torque sensor 4 forms a measurement bridge by arranging the metal resistance strain gauge on an elastic shaft and forms a bridge circuit. When the elastic shaft is subjected to a torque, a slight deformation is generated to cause a change in the bridge resistance. The change in the strain bridge resistance is converted into a change in the voltage signal. The voltage signal is converted into a digital signal processable by a microcomputer system through an ADC analog-to-digital conversion module. Then, the single-chip microcomputer realizes the measurement of the torque value and the torque value change curve.

[0088] Optionally, the torque sensing system has the functions of torque value acquisition, transmission and storage. It can display the real-time torque value and draw a curve, and has an alarm function for the real-time peak value. The torque sensing system supports four-channel data transmission through 485 or 232 serial communication, communicates with remote signals, and uses a fast interface for data lines.

[0089] Through the above torque sensing system for cement mixing, curing and homogenizing monitoring, the effect of accurately obtaining the torque value and the torque value change curve is achieved.

[0090] It should be noted that the above modules can be realized by software or hardware. For the latter, the above modules can be located in the same processor, or the above modules are located in different processors in any combination.

[0091] ​It should be noted that the above modules can be run in a computer terminal as part of the system. The optional or preferred embodiments of the present embodiment can refer to the related description in the embodiments, which will not be repeated here.

[0092] The torque sensing system for cement mixing, curing and homogenization monitoring described above can also include a processor and a memory. The circuits and modules included in the torque sensing system are stored in the memory as program modules, and the corresponding functions are realized by the processor executing the program modules stored in the memory.

[0093] The processor includes a kernel, which retrieves the corresponding program modules from the memory. The kernel can be one or more. The memory can include non-persistent memory in a computer readable medium, random access memory RAM and / or non-volatile memory such as read-only memory ROM or flash memory flash RAM. The memory includes at least one memory chip.

[0094] According to the embodiments of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in the present embodiment, the non-volatile storage medium includes a stored program, wherein the program controls the device in which the non-volatile storage medium is located to execute any of the above cement mixing, curing and homogenization monitoring methods based on torque sensing when the program is running.

[0095] Optionally, in the present embodiment, the non-volatile storage medium can be located in any one of a group of computer terminals in a computer network, or in any one of a group of mobile terminals. The non-volatile storage medium includes a stored program.

[0096] Optionally, the program controls the device in which the non-volatile storage medium is located to perform the following functions when the program is running: real-time acquisition of torque values during the cement mixing process, wherein the torque values are used to indicate the torque generated by the cement on the rotating stirring shaft; determination of the stirring torque dispersion coefficient based on the torque values acquired within a first time period; determination of the derivative value of the stirring torque with respect to time based on the torque values within a second time period in the case where the stirring torque dispersion coefficient is less than a preset coefficient, wherein the second time period is after the first time period; determination of the cement fluid viscosity based on the derivative value of the stirring torque with respect to time and the torque values in the case where the derivative value of the stirring torque with respect to time is less than a preset derivative value; and determination of the cement curing and homogenization result based on the stirring torque dispersion coefficient and the cement fluid viscosity.

[0097] According to the embodiments of the present application, an embodiment of a processor is also provided. Optionally, in the present embodiment, the processor is used to run a program, wherein the program executes any of the above cement mixing, curing and homogenization monitoring methods based on torque sensing when the program is running.

[0098] According to the embodiments of the present application, an embodiment of a computer program product is also provided. Optionally, in the embodiment, the computer program product comprises a computer program, and the computer program is configured to implement the procedures of any one of the cement mixing and curing homogenization monitoring methods based on torque sensing when executed by a processor.

[0099] Optionally, the computer program product, when executed on a data processing device, is adapted to execute the procedures of the following method steps: acquiring torque values in real time during the cement mixing process, wherein the torque values are used to indicate the torque generated by the cement on the rotating mixing shaft; determining a mixing torque dispersion coefficient based on the torque values acquired within a first time period; in the case that the mixing torque dispersion coefficient is less than a preset coefficient, determining a derivative value of the mixing torque with respect to time based on the torque values within a second time period, wherein the second time period is after the first time period; in the case that the derivative value of the mixing torque with respect to time is less than a preset derivative value, determining a cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque values; and determining a cement curing homogenization result based on the mixing torque dispersion coefficient and the cement fluid viscosity.

[0100] The embodiments of the present application provide an electronic device, which comprises a processor, a memory, and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: acquiring torque values in real time during the cement mixing process, wherein the torque values are used to indicate the torque generated by the cement on the rotating mixing shaft; determining a mixing torque dispersion coefficient based on the torque values acquired within a first time period; in the case that the mixing torque dispersion coefficient is less than a preset coefficient, determining a derivative value of the mixing torque with respect to time based on the torque values within a second time period, wherein the second time period is after the first time period; in the case that the derivative value of the mixing torque with respect to time is less than a preset derivative value, determining a cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque values; and determining a cement curing homogenization result based on the mixing torque dispersion coefficient and the cement fluid viscosity.

[0101] The sequence of the above-mentioned embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments.

[0102] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0103] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other manners. For example, the described device embodiments are merely illustrative, and the division of modules can be different from the above. For example, one or more modules or components can be combined or integrated into another system, or some features can be ignored or not implemented. In addition, the coupling or direct coupling or communication connection between the modules can be implemented through some interfaces, and the indirect coupling or communication connection between the modules can be implemented in electrical or other forms.

[0104] The modules described above as separated components can or can not be physically separated, and the components displayed as modules can or can not be physical modules, i.e., can be located in one place, or can be distributed to multiple modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments.

[0105] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically, or two or more modules can be integrated into one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0106] The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can be stored in a computer-readable nonvolatile storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a nonvolatile storage medium, and includes several instructions for causing a computer device, such as a personal computer, a server, or a network device, to execute all or part of the steps of the embodiments of the present application. The aforementioned nonvolatile storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0107] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, several improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A method for monitoring cement mixing, curing and homogenization based on torque sensing, characterized in that, The method comprises: acquiring torque values in real time during cement mixing, wherein the torque values are used to indicate the moment of force generated by the cement on a rotating mixing shaft; determining a mixing torque dispersion coefficient based on the torque values acquired within a first time period; in a case where the mixing torque dispersion coefficient is less than a preset coefficient, determining a derivative value of the mixing torque with respect to time based on the torque values within a second time period, wherein the second time period is after the first time period; in a case where the derivative value of the mixing torque with respect to time is less than a preset derivative value, determining a cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque values; determining a cement solidification and homogenization result based on the mixing torque dispersion coefficient and the cement fluid viscosity.

2. The method for monitoring cement mixing and curing homogenization based on torque sensing according to claim 1, characterized in that, The method comprises: The determination of the mixing torque dispersion coefficient based on the torque values acquired within the first time period comprises: constructing a data set of the torque values in time sequence based on the torque values and time points of the first time period; determining a dispersion coefficient of the torque values within the first time period based on the data set, wherein the dispersion coefficient is used to indicate the dispersion degree of the torque values based on time.

3. The method of claim 1, wherein the method is characterized by: Before the determination of the derivative value of the mixing torque with respect to time based on the torque values within the second time period in a case where the mixing torque dispersion coefficient is less than a preset coefficient, the method further comprises: dividing the cement mixing solidification and homogenization process into a non-steady state phase and a metastable state phase, wherein the non-steady state phase is used to indicate that the cement mixing has not reached a uniform state, and the metastable state phase is used to indicate that the cement mixing is in an initial phase of reaching a uniform state; in a case where there are multiple first time periods in time sequence, traversing to obtain mixing torque dispersion coefficients respectively corresponding to the multiple first time periods, wherein the cement mixing solidification and homogenization process within the first time period is in the non-steady state phase; stopping the traversal and entering the metastable state phase when the mixing torque dispersion coefficients respectively corresponding to the multiple first time periods in time sequence are less than a preset coefficient.

4. The method of claim 3, wherein the method is characterized by: The determination of the derivative value of the mixing torque with respect to time based on the torque values within the second time period in a case where the mixing torque dispersion coefficient is less than a preset coefficient comprises: in a case of the metastable state phase, constructing a time-continuous torque value change curve based on the torque values and time points of the second time period corresponding to the torque values in time sequence within the second time period; determining the derivative value of the mixing torque with respect to time by deriving the torque value change curve based on the second time period.

5. The method for monitoring cement mixing and curing homogenization based on torque sensing as claimed in claim 1, wherein, The determination of the cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque values in a case where the derivative value of the mixing torque with respect to time is less than a preset derivative value comprises: constructing a time-continuous torque value change curve based on the torque values and time points of the second time period corresponding to the torque values in time sequence within the second time period; Determine a linear regression coefficient of the second time period based on the torque value change curve and the derivative value of the stirring torque with respect to time; Determine the intercept of the torque value change curve based on the linear regression coefficient; Determine the cement fluid viscosity based on the intercept.

6. A torque sensing device for cement mixing, curing, and homogenization monitoring, characterized by, The application is applied to the real-time acquisition of torque values in the cement mixing process in the cement mixing and curing homogenization monitoring method in claims 1-5, comprising: A torque sensor (4) is used to acquire torque values in the cement mixing process; A coupling includes an upper coupling (1) and a lower coupling (6), one end of the upper coupling (1) is connected with the torque sensor (4), the other end of the upper coupling (1) is connected with a rotating motor gear shaft, one end of the lower coupling (6) is connected with the torque sensor (4), the other end of the lower coupling (6) is connected with a stirring shaft, and the coupling is used to transmit the stirring intensity of the stirring shaft to the torque sensor (4); A bearing seat is arranged at the connection between the torque sensor (4) and the coupling, and is used to support the coupling; A bearing sleeve (7) is arranged outside the torque sensor (4), and is used to limit the rotation space of the torque sensor (4).

7. The torsion sensing device of claim 6, wherein, Further comprising: An elastic retainer ring (3) is arranged at the connection between the coupling and the torque sensor (4), and is installed in the bearing seat, which can limit the axial displacement of the torque sensor (4).

8. The torsion sensing device of claim 6, wherein, Further comprising: A dust cover is installed outside the bearing sleeve (7), and a plurality of heat dissipation holes for heat dissipation of the torque sensor (4) are arranged on the dust cover.

9. A torque sensing system for cement mixing, curing, and homogenization monitoring, comprising: The application is applied to the real-time acquisition of torque values in the cement mixing process in the cement mixing and curing homogenization monitoring method in claims 1-5, comprising: A metal resistance strain gauge is used to acquire torque signals in the cement mixing process; A bridge circuit is connected with the metal resistance strain gauge, and based on the torque signal, causes the bridge resistance to change, and generates a voltage signal; An amplification circuit is connected with the bridge circuit, and amplifies the voltage signal; An analog-to-digital conversion module is connected with the amplification circuit, and converts the voltage signal into a digital signal; A single-chip microcomputer is connected with the analog-to-digital conversion module, and based on the digital signal, obtains torque values.

10. The torsion sensing system of claim 9, wherein, Further comprising: An LCD display screen is connected with the single-chip microcomputer, and is used to display the torque values; A serial communication is connected with the single-chip microcomputer, and is used to transmit the torque values to a curing homogenization monitoring module.

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