Cement stirring solidification homogenization monitoring method and device based on torque sensing

Abstract

The invention relates to a cement stirring solidification homogenization monitoring method and device based on torque sensing, and the method comprises the steps: obtaining a torque value in a cement stirring process in real time, the torque value being used for indicating the torque generated by cement to a rotating stirring shaft; determining a stirring torque discrete coefficient based on the torque value in the first time period; under the condition that the dispersion coefficient of the stirring torque is smaller than a preset coefficient, the derivative value of the stirring torque to time is determined based on the torque value in a second time period, and the second time period is after the first time period; under the condition that the derivative value of the stirring torque to the time is smaller than the derivative preset value, the cement fluid viscosity is determined based on the derivative value of the stirring torque to the time and the torque value; and determining a cement solidification homogenization result based on the stirring torque discrete coefficient and the cement fluid viscosity. According to the invention, the technical effects of determining the cement solidification quality based on an online monitoring method and effectively controlling the cement solidification quality are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive waste treatment equipment, and in particular to a cement mixing and solidification homogenization monitoring method and device based on torque sensing. Background Art

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

[0003] In order to ensure the performance of cement solidification, the solidification process often uses stirring to fully mix waste with cement and other additives to make the materials in the system homogenized. Although most cement solidification mixing equipment currently uses computer automatic control to reduce the risk of personnel radiation, the judgment of mixing homogeneity mostly relies on time control derived from experience, lacks online monitoring methods, and is difficult to control the quality of cement solidification.

[0004] The above problems need to be solved urgently. Summary of the invention

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

[0006] The present invention adopts the following technical solutions:

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

[0008] Optionally, it includes: determining the discrete coefficient of the stirring torque based on the torque value obtained in the first time period, including: constructing a data set of torque values ​​in time sequence based on the torque values ​​and the time points of the first time period; based on the data set, determining the discrete coefficient of the torque value in the first time period, wherein the discrete coefficient is used to indicate the degree of discreteness of the torque value based on time.

[0009] Optionally, when the stirring torque discrete coefficient is less than a preset coefficient, before determining the derivative value of the stirring torque with respect to time based on the torque value in the second time period, the method also includes: dividing the solidification homogenization process of the cement mixing into a non-steady-state stage and a metastable stage, wherein the non-steady-state stage is used to indicate that the cement mixing has not reached a uniform state, and the metastable stage is used to indicate that the cement mixing is in an initial stage of reaching a uniform state; in chronological order, when there are multiple first time periods, traversing to obtain the stirring torque discrete coefficients corresponding to the multiple first time periods respectively, wherein the solidification homogenization process of the cement mixing in the first time period is in the non-steady-state stage; in chronological order, when the stirring torque discrete coefficients corresponding to the multiple first time periods respectively are less than the preset coefficient, stopping the traversal and entering the metastable stage.

[0010] Optionally, when the discrete coefficient of the stirring torque is less than a preset coefficient, the derivative value of the stirring torque with respect to time is determined based on the torque value within the second time period, including: in the metastable state stage, within the second time period, in chronological order, a time-continuous torque value change curve is constructed based on the torque value and the time points of the second time period corresponding to the torque value; based on the torque value change curve, the derivative value of the stirring torque with respect to time is determined by deriving the torque value change curve based on the time points of the second time period.

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

[0012] According to another aspect of an embodiment of the present invention, a torque sensing device for monitoring cement mixing, solidification and homogenization is provided, including: a torque sensor for obtaining the torque value during cement mixing; a coupling, including an upper coupling and a lower coupling, one end of the upper coupling being connected to the torque sensor, and the other end of the upper coupling being connected to the rotating motor gear shaft, one end of the lower coupling being connected to the torque sensor, and the other end of the lower coupling being connected to the stirring shaft, and the coupling being used to transmit the stirring force of the stirring shaft to the torque sensor; a bearing seat, arranged at the connection between the torque sensor and the coupling, for supporting the coupling; a bearing sleeve, arranged on the outside of the torque sensor, for limiting the rotation space of the torque sensor.

[0013] Optionally, it also includes: an elastic retaining ring, which is arranged at the connection between the coupling and the torque sensor and installed in the bearing seat, and can limit the axial displacement of the torque sensor.

[0014] Optionally, it also includes: a dust cover installed on the outer side of the bearing sleeve, and the dust cover is provided with a plurality of heat dissipation holes for dissipating heat of the torque sensor.

[0015] According to another aspect of an embodiment of the present invention, a torque sensing system for monitoring cement mixing, solidification and homogenization is provided, including: a metal resistance strain gauge, used to obtain a torque signal during the cement mixing process; a bridge circuit, connected to the metal resistance strain gauge, causing the bridge resistance to change based on the torque signal to generate a voltage signal; an amplifier circuit, connected to the bridge circuit, amplifying the voltage signal; an analog-to-digital conversion module, connected to the amplifier circuit, converting the voltage signal into a digital signal; and a single-chip microcomputer, connected to the analog-to-digital conversion module, obtaining a torque value based on the digital signal.

[0016] Optionally, it also includes: an LCD display screen, connected to the single-chip microcomputer, for displaying the torque value; and a serial port communication, connected to the single-chip microcomputer, for transmitting the torque value to a curing homogenization monitoring module.

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

[0018] In an embodiment of the present invention, by acquiring a torque value in a cement mixing process in real time, wherein the torque value is used to indicate the torque generated by the cement on the rotating mixing shaft; determining a mixing torque discrete coefficient based on the torque value acquired in a first time period; determining a derivative value of the mixing torque with respect to time based on the torque value in a second time period when the mixing torque discrete coefficient is less than a preset coefficient, wherein the second time period is after the first time period; determining a cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque value when the derivative value of the mixing torque with respect to time is less than a preset value of the derivative; determining a cement solidification homogenization result based on the mixing torque discrete coefficient and the cement fluid viscosity, thereby achieving the purpose of determining the cement fluid viscosity based on the torque value, thereby obtaining a cement solidification homogenization result, thereby achieving a technical effect of determining the cement solidification quality based on online monitoring means, so that the cement solidification quality can be controlled, thereby solving the technical problem that the judgment of mixing homogeneity mostly relies on time control derived from experience and lacks online monitoring means, making it difficult to control the cement solidification quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a cement mixing and solidification homogenization monitoring method based on torque sensing in Example 1 of the present invention;

[0021] Figure 2 is a stage division diagram of a cement mixing and solidification homogenization monitoring method based on torque sensing in Example 1 of the present invention;

[0022] Figure 3 is a flow chart of an optional method for monitoring cement mixing and solidification homogenization based on torque sensing in Example 2 of the present invention;

[0023] Figure 4 It is a schematic diagram of the disassembled structure of a torque sensing device for monitoring cement mixing, solidification and homogenization in Example 3 of the present invention;

[0024] Figure 5 Schematic diagram of the combined structure of a torque sensor device for monitoring cement mixing, solidification and homogenization in Embodiment 3 of the present invention;

[0025] Figure 6 This is a connection diagram of electronic components of a torque sensing system for monitoring cement mixing, solidification and homogenization in Example 4 of the present invention.

[0026] Description of reference numerals:

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

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

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

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

[0034] Homogenization refers to the state in which each component is evenly distributed in the mixed system during cement mixing.

[0035] In order to solve the problems existing in the prior art, the embodiments of the present application provide a method and device for monitoring cement mixing and solidification homogenization based on torque sensing.

[0036] Example 1

[0037] This embodiment provides a method for monitoring cement mixing and solidification homogenization based on torque sensing. Figure 1 As shown, Figure 1 : is a flow chart of a cement mixing and solidification homogenization monitoring method based on torque sensing in Example 1 of the present invention, the method comprising:

[0038] Step S102, obtaining the torque value in the cement mixing process in real time, wherein the torque value is used to indicate the moment generated by the cement on the rotating mixing shaft;

[0039] Optionally, a torque sensor 4 is used to obtain the torque value in the cement mixing process in real time, wherein one end of the torque sensor 4 is connected to a rotating motor, and the other end is connected to a stirring shaft. The rotating motor drives the stirring shaft to rotate, so that the cement and radioactive waste are mixed evenly. During the mixing process, the cement gradually solidifies, and the stirring force of the stirring shaft gradually increases. The torque sensor 4 obtains the torque value transmitted by the stirring shaft, thereby determining the torque generated by the cement on the rotating stirring shaft.

[0040] Step S104, determining a stirring torque dispersion coefficient based on the torque value obtained in the first time period;

[0041] In some preferred embodiments, it includes: determining the dispersion coefficient of the stirring torque based on the torque values ​​obtained in the first time period, including: constructing a data set of torque values ​​in time sequence based on the torque values ​​and the time points of the first time period; based on the data set, determining the dispersion coefficient of the torque values ​​in the first time period, wherein the dispersion coefficient is used to indicate the degree of dispersion of the torque values ​​based on time.

[0042] Optionally, the torque values ​​acquired in real time are divided into a first time period and a second time period in chronological order. The first time period is before the second time period. Within the first time period, the torque values ​​are arranged in chronological order. Based on the interval of the arrangement, the discrete degree of the torque values ​​can be determined. A discrete coefficient is used to characterize the discrete degree. When the discrete coefficient is high, it indicates that the torque value of the mixing process changes greatly, and the cement is in an uneven stage. The result of cement uniformity is not met at this stage, and mixing needs to continue.

[0043] Step S106, when the dispersion coefficient of the stirring torque is less than the preset coefficient, determining the derivative value of the stirring torque with respect to time based on the torque value in a second time period, wherein the second time period is after the first time period;

[0044] In some preferred embodiments, when the stirring torque discrete coefficient is less than a preset coefficient, before determining the derivative value of the stirring torque with respect to time based on the torque value in the second time period, the method also includes: dividing the solidification homogenization process of cement mixing into a non-steady-state stage and a metastable stage, wherein the non-steady-state stage is used to indicate that the cement mixing has not reached a uniform state, and the metastable stage is used to indicate that the cement mixing is in an initial stage of reaching a uniform state; in accordance with the time sequence, when there are multiple first time periods, traversing to obtain the stirring torque discrete coefficients corresponding to each of the multiple first time periods, wherein the solidification homogenization process of cement mixing in the first time period is in a non-steady-state stage; in accordance with the time sequence, until the stirring torque discrete coefficients corresponding to each of the multiple first time periods are less than the preset coefficient, stopping the traversal and entering the metastable stage.

[0045] Optional, such as Figure 2 As shown, Figure 2 This is a stage division diagram of a cement mixing and solidification homogenization monitoring method based on torque sensing in Example 1 of the present invention. The mixing stage after cement addition is divided into a non-steady-state stage and a metastable stage. The non-steady-state stage refers to the initial period of mixing after cement addition and addition is completed, when the cement in the system is not completely mixed and participates in the solidification reaction; the metastable stage refers to the period after cement is added and stirred for a period of time, when the cement is basically mixed and participates in the solidification reaction, and begins to set.

[0046] Optionally, multiple first time periods are divided in chronological order, each first time period corresponds to a stirring torque discrete coefficient, and the stirring torque discrete coefficient is continuously traversed in chronological order until the stirring torque discrete coefficient is less than the preset coefficient, then the division of the first time period is stopped and the second time period is entered. It should be noted that the first time period and the second time period for setting the periodic time of collecting the torque value should be longer than the stirring shaft rotation period (if the stirring supports revolution, it is also longer than the revolution period). This method can ensure that the discrete degree is representative, and the stirring period also needs to be adjusted according to the rotation speed of the actual stirring process.

[0047] In some preferred embodiments, when the discrete coefficient of the stirring torque is greater than a preset coefficient, the derivative value of the stirring torque with respect to time is determined based on the torque value within the second time period, including: in the metastable stage, within the second time period, in chronological order, based on the torque value and the time points of the second time period corresponding to the torque value, constructing a time-continuous torque value change curve; based on the torque value change curve, taking the time derivative of the torque value change curve based on the second time period, determining the derivative value of the stirring torque with respect to time.

[0048] Optionally, when it is determined that the cement solidification process has entered the metastable stage, that is, entered the second time period, it is necessary to calculate the derivative dM / dt of the curvature of the torque value change curve with respect to time in the second time period to determine the derivative value of the stirring torque with respect to time. Among them, the derivative value of the stirring torque with respect to time can represent the progress of cement solidification homogenization. When the derivative of the torque value change curve with respect to time has approached zero, it is less than the pre-set derivative preset value, indicating that the homogenization has been completed, that is, the water, ash and radioactive waste have been mixed evenly; if it is not close to zero, it is still greater than the set torque with respect to time derivative preset value, indicating that the stirring time still needs to be extended. The result of cement solidification homogenization can be substantially determined by the torque value change curve, avoiding the imperfect effect of solidification homogenization caused by human subjective judgment.

[0049] Step S108, when the derivative value of the stirring torque with respect to time is less than the preset derivative value, determining the viscosity of the cement fluid based on the derivative value of the stirring torque with respect to time and the torque value;

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

[0051] Optionally, when the derivative value of the stirring torque with respect to time is less than the preset value of the derivative, the cement has entered the solidification stage and gradually solidified, so the derivative value of the stirring torque with respect to time decreases, or even gradually approaches 0. In the cement solidification stage, it is necessary to judge the degree of cement solidification by obtaining the linear regression coefficient, 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 is determined on the torque value change curve (the intercept is the torque value), and the torque value can directly represent the viscosity of the cement fluid. Specifically, when the torque value is small, the viscosity of the cement fluid is low, and when the torque value is large, the viscosity of the cement fluid is high. It should be noted that the viscosity of the cement can only be reflected under the same process conditions to keep the rotation speed consistent.

[0052] Step S110, determining the cement solidification homogenization result based on the stirring torque dispersion coefficient and the cement fluid viscosity.

[0053] Optionally, when the viscosity of the cement fluid is higher than a certain threshold, it indicates that the cement flow state is low, that is, it cannot flow and is about to solidify. 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 to obtain the cement solidification homogenization result is achieved, thereby achieving the technical effect of determining the cement solidification quality based on online monitoring means, so that the cement solidification quality can be controlled, and further solving the technical problem that the judgment of stirring homogeneity mostly relies on time control derived from experience and lacks online monitoring means, making it difficult to control the cement solidification quality.

[0055] Example 2

[0056] Based on the above embodiments and optional embodiments, the present invention also proposes an optional implementation mode: Figure 3 is a flow chart of an optional method for monitoring cement mixing and solidification homogenization based on torque sensing in Example 2 of the present invention, such as Figure 3 As shown, the method includes:

[0057] Step S1, obtaining the real-time torque value during the stirring process based on the torque sensor 4.

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

[0059] Among them, the non-steady-state stage refers to the initial period of stirring after the addition of cement and the completion of the addition, during which the cement in the system is not completely mixed and participates in the curing reaction; the metastable state refers to the period after the addition and stirring of cement for a period of time, when the cement is basically mixed evenly and participates in the curing reaction, and begins to set.

[0060] Step S2, the microcomputer system determines the cement adding and mixing stage based on the discrete degree of the torque value within the set cycle time, using the discrete coefficient value V s (M) indicates the degree of cement solidification homogenization.

[0061] When the discrete coefficient during this period of time is greater than the preset coefficient, it means that the torque value changes greatly during the mixing process, and the mixing stage is in a non-steady-state stage. At this time, materials are being added or the cement has not been fully mixed. As the mixing proceeds, the discrete coefficient gradually decreases. When the discrete coefficient during this period of time is less than the preset coefficient, it means that the torque value changes little during the mixing process, and the mixing stage enters a metastable stage, at which time the mixture is basically mixed evenly.

[0062] It should be noted that the preset coefficient should be determined based on the torque value change curve obtained from the preliminary experiment, through actual conditions, specific process requirements and manual observation of cement solidification conditions.

[0063] 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 should also be longer than the revolution period) to ensure that the discrete degree is representative and should be adjusted according to the speed of the actual stirring process. At the same time, the first time period and the second time period should not be too long to avoid the cement solidifying due to too long time and the failure of the judgment method.

[0064] In addition, when the dispersion coefficient in the first time period is less than the preset coefficient, the torque dispersion change in two first time periods should be measured again, and multiple records should be made to ensure uniform mixing after entering the metastable state.

[0065] Step S3, when it is determined that the cement curing process has entered the metastable stage, the derivative dM / dt of the slope of the torque value change curve in the second time period to time is calculated to represent the progress of cement curing homogenization. When the derivative of the torque value change curve to time is close to zero and is less than the preset derivative preset value, it means that homogenization has been completed; if it is not close to zero and is still greater than the preset derivative value, it means that the mixing time still needs to be extended.

[0066] Step S4, when the stirring stage enters the metastable state and the homogenization progress is basically completed, the torque value can reflect the rheological properties of the fluid in the current stirring field to a certain extent, that is, the fluid viscosity. After determining that the microcomputer system enters the metastable state, it calculates the linear regression coefficient of the torque value change curve within the third time period, where the intercept value M a The viscosity of the fluid may be represented by the third time period following the second time period.

[0067] Optionally, a large number of torque values ​​are used as a basis for evaluating cement curing formulas and processes, and provide a reference for real-time adjustments during cement curing. 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 indicate an 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 curing effect has not been achieved.

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

[0069] Example 3

[0070] According to an embodiment of the present invention, there is also provided an embodiment of a torque sensing device for monitoring cement mixing, solidification and homogenization. Figure 4 and Figure 5 As shown, Figure 4 is a schematic diagram of the disassembled structure of a torque sensor device for monitoring cement mixing, solidification and homogenization in Example 3 of the present invention, Figure 5 It is a schematic diagram of the combined structure of a torque sensing device for monitoring cement mixing, solidification and homogenization in Example 3 of the present invention.

[0071] The torque sensing device includes: a torque sensor 4, which is used to obtain the torque value during the cement mixing process; a coupling, including an upper coupling 1 and a lower coupling 6, wherein one end of the upper coupling 1 is connected to the torque sensor 4, and the other end of the upper coupling 1 is connected to the rotating motor gear shaft, one end of the lower coupling 6 is connected to the torque sensor 4, and the other end of the lower coupling 6 is connected to the stirring shaft, and the coupling is used to transmit the stirring force of the stirring shaft to the torque sensor 4; a bearing seat, which is arranged at the connection between the torque sensor 4 and the coupling, and is used to support the coupling; a bearing sleeve 7, which is arranged on the outside of the torque sensor 4, and is used to limit the rotation space of the torque sensor 4.

[0072] Optionally, the torque sensor 4 is connected to the upper coupling 1 and the lower coupling 6 respectively, and is fixed as a whole with the bearing sleeve 7 through the bearing seat, and each part is connected and assembled in sequence along the central axis. The torque sensor 4 is the core device for obtaining the torque value in the torque test device. The non-contact dynamic torque sensor 4 is adopted, and high-precision torque measurement can be achieved in complex and harsh environments. Its structure includes a sensor frame, an upper rotating shaft and a lower rotating shaft, wherein the sensor frame is the main part of the torque sensor 4, which contains the torque measuring element, and the upper rotating shaft and the lower rotating shaft are motion units that can rotate continuously.

[0073] Optionally, the upper coupling 1 is respectively connected to the motor gear shaft and the upper rotating shaft of the torque sensor 4, the inner diameter of the upper end of the upper coupling 1 is consistent with the diameter of the motor gear shaft, and the lower end is consistent with the diameter of the upper rotating shaft of the torque sensor 4; the lower coupling 6 is respectively connected to the lower rotating shaft of the torque sensor 4 and the stirring paddle connecting shaft, the upper end of the lower 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 stirring paddle connecting shaft. Under the condition of ensuring that each shaft is fully aligned, the upper coupling 1 and the lower coupling 6 use rigid couplings to achieve gapless transmission.

[0074] Optionally, the coupling is connected by a key pin to achieve the positioning and fixation of each shaft for transmitting motion and torque. The inner diameter of the 6 holes of the upper and lower couplings should be customized according to the outer diameter of the motor gear shaft and the stirring shaft, and an interference fit should be adopted.

[0075] Optionally, the bearing seat is used to support the coupling, and the bearing seat includes an upper bearing seat 2 and a lower bearing seat 5. The upper bearing seat 2 and the lower bearing seat 5 are fixed to the bearing sleeve 7 by bolts to form a whole, thereby protecting the internal torque sensor 4 and each connecting shaft from contamination and collision; the inner hole diameter of the bearing seat is equal to the corresponding outer diameter of the coupling, and the alignment of each shaft is ensured through cooperation to limit the radial displacement of the torque sensor 4.

[0076] Optionally, a polytetrafluoroethylene sealing ring is installed on the outer side of the bearing seat through the coupling to ensure the sealing effect of the bearing seat.

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

[0078] In some preferred embodiments, the torque sensor device further includes: an elastic retaining ring 3, which is arranged at the connection between the coupling and the torque sensor 4 and installed in the bearing seat, and can limit the axial displacement of the torque sensor 4.

[0079] Optionally, an elastic retaining ring 3 is selected and placed on the outer shaft ring of the coupling facing the torque sensor 4, and the axial displacement of the torque sensor 4 is limited by the elastic retaining ring 3 cooperating with the bearing seat.

[0080] In some preferred embodiments, the torque sensor device further includes: a dust cover installed on the outer side of the bearing sleeve 7, and the dust cover is provided with a plurality of heat dissipation holes for heat dissipation of the torque sensor 4.

[0081] Based on the above embodiment, the installation principle of a torque sensor device for cement mixing, solidification and homogenization monitoring is as follows: put the torque sensor 4 into the bearing sleeve 7, and fix the torque sensor 4 by the side wall bolts. Pass the upper coupling 1 through the inner hole of the upper bearing seat 2, so that the lower flange of the upper end of the coupling is close to the bearing seat, and the elastic retaining ring 3 is sleeved on the outer ring of the lower end of the coupling, and the upper coupling 1 is clamped close to the bearing seat. The lower end of the upper coupling 1 is connected and fixed to the torque sensor 4 placed in the bearing sleeve 7, and the upper bearing seat 2 is fixed to the bearing sleeve 7 by bolts. Pass the lower coupling 6 through the inner hole of the lower bearing seat 5, and the elastic retaining ring 3 is sleeved on the outer ring of the upper end of the coupling, and the upper coupling 1 is clamped close to the bearing seat. The upper end of the lower coupling 6 is connected and fixed to the sensor placed in the bearing sleeve 7, and the lower bearing seat 5 is fixed to the bearing sleeve 7 by bolts. Finally, fix the cover plate 8 on the upper surface of the bearing sleeve 7. After the device is assembled, it can be connected to the motor gear shaft and the stirring paddle connecting shaft respectively and used.

[0082] Through the above-mentioned torque sensor device for cement mixing, solidification and homogenization monitoring, the torque sensor device is stable and reliable, easy to install and disassemble, and meets the effect of normal use in the cement solidification environment.

[0083] Example 4

[0084] According to an embodiment of the present invention, there is also provided an embodiment of a torque sensing system for monitoring cement mixing, solidification and homogenization. Figure 6 As shown, Figure 6 This is a connection diagram of electronic components of a torque sensing system for monitoring cement mixing, solidification and homogenization in Example 4 of the present invention.

[0085] The torque sensing system includes: a metal resistance strain gauge, which is used to obtain the torque signal during the cement mixing process; a bridge circuit, which is connected to the metal resistance strain gauge and causes the bridge resistance to change based on the torque signal to generate a voltage signal; an amplifier circuit, which is connected to the bridge circuit and amplifies the voltage signal; an analog-to-digital conversion module, which is connected to the amplifier circuit and converts the voltage signal into a digital signal; and a single-chip microcomputer, which is connected to the analog-to-digital conversion module and obtains the torque value based on the digital signal.

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

[0087] Optionally, the torque sensor 4 adopts a dynamic torque sensor 4, in which the sensitive element included is a metal resistance strain gauge. The torque sensor 4 forms a measuring bridge by building a metal resistance strain gauge on the elastic shaft, and forms a bridge circuit. When the elastic shaft is subjected to torque, a slight deformation causes a change in the bridge resistance, and the change in the resistance of the strain bridge is converted into a change in a voltage signal. The voltage signal is converted into a digital signal that can be processed by the microcomputer system through the ADC analog-to-digital conversion module, and 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 collecting, transmitting and storing torque values, can display real-time torque values ​​and draw curves, and has an alarm function for real-time peak values. The torque sensing system supports four-channel data transmission, communicates through 485 or 232 serial ports, and transmits signals remotely. The data line uses a fast interface.

[0089] Through the above-mentioned torque sensing system for cement mixing, solidification and homogenization 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 implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be 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 implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

[0092] The above-mentioned torque sensing system for monitoring cement mixing, solidification and homogenization may also include a processor and a memory. The circuits and modules included in the above-mentioned torque sensing system are stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to realize the corresponding functions.

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

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

[0095] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

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

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

[0098] According to an embodiment of the present application, an embodiment of a computer program product is also provided. Optionally, in this embodiment, the computer program product includes a computer program, which, when executed by a processor, implements any of the steps of the cement mixing and solidification homogenization monitoring method based on torque sensing.

[0099] Optionally, the above-mentioned computer program product, when executed on a data processing device, is suitable for executing a program initialized with the following method steps: obtaining the torque value in the cement mixing process in real time, wherein the torque value is used to indicate the torque generated by the cement on the rotating mixing shaft; determining the mixing torque discrete coefficient based on the torque value obtained within a first time period; when the mixing torque discrete coefficient is less than a preset coefficient, determining the derivative value of the mixing torque with respect to time based on the torque value within a second time period, wherein the second time period is after the first time period; when the derivative value of the mixing torque with respect to time is less than a preset value of the derivative, determining the cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque value; determining the cement solidification homogenization result based on the mixing torque discrete coefficient and the cement fluid viscosity.

[0100] An embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: obtaining a torque value in a cement mixing process in real time, wherein the torque value is used to indicate the torque generated by the cement on a rotating mixing shaft; determining a mixing torque discrete coefficient based on a torque value obtained within a first time period; when the mixing torque discrete coefficient is less than a preset coefficient, determining a derivative value of the mixing torque with respect to time based on a torque value within a second time period, wherein the second time period is after the first time period; when the derivative value of the mixing torque with respect to time is less than a preset value of the derivative, determining a cement fluid viscosity based on the derivative value of the mixing torque with respect to time and the torque value; and determining a cement solidification homogenization result based on the mixing torque discrete coefficient and the cement fluid viscosity.

[0101] The above sequence of the embodiments of the present invention is for description only and does not represent the superiority or inferiority of the embodiments.

[0102] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0104] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0105] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0106] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a non-volatile storage medium, including a number of instructions to enable a computer device to perform all or part of the steps of the various embodiments of the present invention, such as a personal computer, a server or a network device. The aforementioned non-volatile storage medium includes: U disk, read-only memory ROM, Read-OnlyMemory, random access memory RAM, Random Access Memory, mobile hard disk, magnetic disk or optical disk, etc., which can store program codes.

[0107] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for monitoring cement mixing and solidification homogenization based on torque sensing, characterized in that: include: Real-time acquisition of torque values ​​during cement mixing, wherein the torque values ​​are used to indicate the moment generated by cement on the rotating mixing shaft; Determining a stirring torque dispersion coefficient based on the torque value obtained during the first time period; When the dispersion coefficient of the stirring torque is less than a preset coefficient, determining a derivative value of the stirring torque with respect to time based on a torque value in a second time period, wherein the second time period is after the first time period; When the derivative value of the stirring torque with respect to time is less than a preset derivative value, determining the viscosity of the cement fluid based on the derivative value of the stirring torque with respect to time and the torque value; A cement solidification homogenization result is determined based on the stirring torque dispersion coefficient and the cement fluid viscosity.

2. The method for monitoring cement mixing and solidification homogenization based on torque sensing according to claim 1, characterized in that: include: The step of determining the stirring torque dispersion coefficient based on the torque value obtained in the first time period includes: Based on the torque values ​​and the time points of the first time period, construct a data set of torque values ​​in time sequence; Based on the data set, a dispersion coefficient of the torque value within the first time period is determined, wherein the dispersion coefficient is used to indicate a dispersion degree of the torque value based on time.

3. The method for monitoring cement mixing and solidification homogenization based on torque sensing according to claim 1, characterized in that: Before determining the derivative value of the stirring torque with respect to time based on the torque value in the second time period when the stirring torque dispersion coefficient is less than the preset coefficient, the method further includes: The solidification homogenization process of the cement mixing is divided into a non-stable stage and a metastable stage, wherein the non-stable stage is used to indicate that the cement mixing has not reached a uniform state, and the metastable stage is used to indicate that the cement mixing is in an initial stage of reaching a uniform state; In the case where there are multiple first time periods in time sequence, the stirring torque discrete coefficients corresponding to the multiple first time periods are traversed and obtained, wherein the solidification homogenization process of the cement stirring in the first time period is in the non-steady-state stage; In time sequence, when the discrete coefficients of the stirring torque respectively corresponding to a plurality of the first time periods are less than a preset coefficient, the traversal is stopped and the metastable state stage is entered.

4. The method for monitoring cement mixing and solidification homogenization based on torque sensing according to claim 3 is characterized in that: When the dispersion coefficient of the stirring torque is less than a preset coefficient, determining the derivative value of the stirring torque with respect to time based on the torque value in the second time period includes: In the case of the metastable stage, within the second time period, in chronological order, a time-continuous torque value variation curve is constructed based on the torque values ​​and the time points of the second time period corresponding to the torque values; Based on the torque value variation curve, the torque value variation curve is derivatized based on the time of the second time period to determine the derivative value of the stirring torque with respect to time.

5. The method for monitoring cement mixing and solidification homogenization based on torque sensing according to claim 1, characterized in that: When the derivative value of the stirring torque with respect to time is less than a preset derivative value, determining the viscosity of the cement fluid based on the derivative value of the stirring torque with respect to time and the torque value includes: In the second time period, constructing a time-continuous torque value variation curve based on the torque values ​​and the time points of the second time period corresponding to the torque values ​​in chronological order; Determining a linear regression coefficient of the second time period based on the torque value variation curve and the derivative value of the stirring torque with respect to time; Based on the linear regression coefficient, determining the intercept of the torque value change curve; Based on the intercept, the cement fluid viscosity is determined.

6. A torque sensing device for cement mixing, solidification and homogenization monitoring, characterized in that: The method for monitoring cement mixing, solidification and homogenization according to claim 1 to claim 5 is used to obtain the torque value in the cement mixing process in real time, comprising: A torque sensor (4) is used to obtain the torque value during cement mixing; A coupling, comprising an upper coupling (1) and a lower coupling (6), wherein one end of the upper coupling (1) is connected to the torque sensor (4), and the other end of the upper coupling (1) is connected to the gear shaft of the rotating motor; one end of the lower coupling (6) is connected to the torque sensor (4), and the other end of the lower coupling (6) is connected to the stirring shaft; the coupling is used to transmit the stirring force of the stirring shaft to the torque sensor (4); A bearing seat, arranged at the connection between the torque sensor (4) and the coupling, and used for supporting the coupling; A bearing sleeve (7) is arranged on the outside of the torque sensor (4) and is used to limit the rotation space of the torque sensor (4).

7. The torque sensing device according to claim 6, characterized in that: Also includes: An elastic retaining ring (3) is arranged at the connection between the coupling and the torque sensor (4) and is installed in the bearing seat, and can limit the axial displacement of the torque sensor (4).

8. The torque sensing device according to claim 6, characterized in that: Also includes: A dust cover is installed on the outside of the bearing sleeve (7), and a plurality of heat dissipation holes for dissipating heat from the torque sensor (4) are provided on the dust cover.

9. A torque sensing system for cement mixing, solidification and homogenization monitoring, characterized in that: The method for monitoring cement mixing, solidification and homogenization according to claim 1 to claim 5 is used to obtain the torque value in the cement mixing process in real time, comprising: Metal resistance strain gauge, used to obtain torque signal during cement mixing; A bridge circuit is connected to the metal resistance strain gauge, and based on the torque signal, causes the bridge resistance to change and generates a voltage signal; an amplifier circuit, connected to the bridge circuit, to amplify the voltage signal; An analog-to-digital conversion module, connected to the amplifying circuit, converts the voltage signal into a digital signal; The single chip microcomputer is connected to the analog-to-digital conversion module and obtains a torque value based on the digital signal.

10. The torque sensing system according to claim 9, characterized in that: Also includes: An LCD display screen, connected to the single chip computer, and used to display the torque value; Serial communication is connected to the single chip microcomputer and is used to transmit the torque value to the curing homogenization monitoring module.

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