CN114459957B - High-temperature viscosity tester for continuous casting mold flux - Google Patents
High-temperature viscosity tester for continuous casting mold flux Download PDFInfo
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- CN114459957B CN114459957B CN202111647034.6A CN202111647034A CN114459957B CN 114459957 B CN114459957 B CN 114459957B CN 202111647034 A CN202111647034 A CN 202111647034A CN 114459957 B CN114459957 B CN 114459957B
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 56
- 230000004907 flux Effects 0.000 title claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 15
- 238000005259 measurement Methods 0.000 description 14
- 239000000523 sample Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 241001422033 Thestylus Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the technical field of continuous casting mold flux viscosity measuring instruments, and discloses a high-temperature viscosity measuring instrument for continuous casting mold flux, wherein the bottom of a lifting device is fixedly arranged at the upper end position of a bottom upright post; the left side of the rotary swinging device is arranged on the lifting device; the fixed plate is fixedly arranged at a position close to the upper part of the upper upright post, the stepping motor III is fixedly arranged at the center position of the motor mounting frame II, and the upper part of the rotating shaft is fixedly connected with a power output shaft of the stepping motor III; the torque sensor is fixedly arranged at the lower part of a power output shaft of the stepping motor III, the lower part of the rotating shaft is fixedly provided with a movable connecting device, the measuring rod is fixedly arranged at the lower part of the movable connecting device, and the lower part of the measuring rod is fixedly provided with a measuring head. The invention improves the accuracy of measuring the viscosity of the viscosity measuring instrument, improves the mobility of the connection of the torque sensor and the measuring rod, improves the verticality of the side rod and the measuring head, realizes the accurate control of the insertion depth of the measuring head of the measuring rod and reduces the viscosity measuring error.
Description
Technical Field
The invention belongs to the technical field of continuous casting mold flux viscosity measuring instruments, and particularly relates to a high-temperature viscosity measuring instrument for continuous casting mold flux.
Background
The viscosity tester is mainly applied to viscosity measurement of continuous casting mold flux. The continuous casting mold flux has the main functions of: firstly, the contact between air and molten steel is isolated, the secondary oxidation of the molten steel is blocked, the contact between a carbon-rich layer and the molten steel is blocked, the surface carburetion of a casting blank is avoided, the surface quality of the casting blank is improved, and the loss of steel is reduced. Secondly, the molten impurities (metallic impurities such as refractory materials of a system, deoxidized products and the like) are absorbed, the performance of the molten steel is protected from being changed, molten steel is purified, and the purity of the surface of a casting blank is improved. The low viscosity of the mold flux and the proper control of certain components of the mold flux are beneficial to the suction of the mold flux. Thirdly, the operation environment (heat radiation) of the factory is greatly improved, and the smooth continuous casting is facilitated.
The viscosity principle of the continuous casting mold flux measured by the viscosity measuring instrument is as follows: under the condition that the melting temperature of the casting powder is higher than that of the continuous casting powder, the graphite or metallic molybdenum measuring head is immersed in the casting powder contained in the graphite crucible to meltIn the body, the torque of the measuring head is measured by a torque sensor, and the slag viscosity is determined. When the geometric conditions of the measuring head and the graphite crucible, the measuring rod size and the rotating speed are fixed, the viscosity is only proportional to the torsion angle or torque of the measuring rod, namely the time difference Deltat of the pulse signal, and the other parameters are all merged into a constant K, and the viscosity calculation formula is as follows:k is an instrument constant, the time difference of a delta t measuring rod torsion angle or torque pulse signal is represented by S, and eta is a viscosity value of continuous casting mold flux and is represented by Pa.s. After the measuring system (measuring rod, measuring head and rotating speed) is fixed, the viscosity of the continuous casting powder can be calculated by measuring delta t through calibrating standard viscosity liquid with known viscosity.
In the prior art, the main factors influencing the accuracy of measuring the viscosity of a viscosity measuring instrument are the equipment constant of the instrument and the time difference of the torsion angle or torque pulse signal of a measuring rod. In the case of a viscometer geometry, an instrument calibration of the viscometer can be achieved by means of a standard viscosity sample, and the instrument constants of the device are determined. Another factor affecting the accuracy of the viscosity measurement by the viscometer (the angle of the spindle or the time difference in the torque pulse signal) can only be reduced by precise control of the viscometer. The problems of the conventional continuous casting mold flux viscosity measuring instrument are as follows: 1. the automatic control precision is low, and the accuracy of the viscosity measurement of the continuous casting mold flux is affected; 2. the flexibility activity of the measuring rod and the torque sensor is poor, so that the perpendicularity of a measuring head of the measuring rod is influenced, the rotation torque of the measuring head and a rotation section of the continuous casting mold flux solution is influenced, and the accuracy of viscosity measurement is reduced; 3. the insertion depth of the measuring rod and the measuring head cannot be controlled (the deeper the insertion depth is, the larger the rotation torque of the corresponding measuring head is), so that the accuracy of the viscosity measuring instrument is reduced; the inventors have developed a high temperature viscosimeter for continuous casting mold flux based on the above-mentioned defects in the prior art, which can well solve the above-mentioned problems existing in the prior art.
Disclosure of Invention
The invention aims to solve the technical problems and provides a high-temperature viscosity tester for continuous casting mold flux, which has scientific and reasonable design structure, convenient operation and high degree of automation; the invention can solve the problems that the automatic control precision of the existing viscosity measuring instrument is low, the accuracy of the viscosity measurement of the continuous casting mold flux is affected, and meanwhile, the problems that the flexibility activity of a measuring rod and a torque sensor is poor, and the perpendicularity of a measuring rod measuring head is affected are solved; the problem that the accuracy of the viscosity tester is reduced due to the fact that the insertion depth of the measuring rod and the measuring head cannot be controlled is also solved.
The technical scheme adopted by the invention is as follows: a high-temperature viscosity tester for continuous casting mold flux comprises a bracket, a heating furnace and a base; the support is of a square structure, a base is fixedly arranged at the left side of the upper part of the support, a heating furnace is fixedly arranged at the right side of the base, the heating furnace is used for carrying out high-temperature melting on continuous casting mold flux, a bottom upright post is fixedly arranged at the upper part of the base, and an upper upright post is fixedly arranged at the upper part of the bottom upright post; the bottom of the lifting device is fixedly arranged at the upper end of the bottom upright post, and the upper part of the lifting device is fixedly arranged at the upper end of the upper upright post and is fixed through a fixing flange; the left side of the rotary swinging device is arranged on the lifting device, and the right side of the rotary swinging device is sleeved on the upper upright post; the fixed plate is fixedly arranged at a position close to the upper part of the upper upright post, the left end of the fixed plate is fixedly arranged at the middle position of the rotary swinging device, the upper part of the right end of the fixed plate is fixedly provided with a motor mounting frame II, a stepping motor III is fixedly arranged at the central position of the motor mounting frame II, a power output shaft of the stepping motor III penetrates through the right end of the fixed plate to extend to the lower part, the rotating shaft is a central shaft of the torque sensor, the upper part of the rotating shaft is fixedly connected with the power output shaft of the stepping motor III, and the lower part of the rotating shaft is provided with a mounting groove; the torque sensor is fixedly arranged at the lower part of a power output shaft of the stepping motor III, the lower part of the rotating shaft is fixedly provided with a movable connecting device, the measuring rod is fixedly arranged at the lower part of the movable connecting device, and the lower part of the measuring rod is fixedly provided with a measuring head.
The lifting device comprises a first motor mounting plate which is fixedly arranged at the upper end position of the bottom upright post, and the first motor mounting plate is fixed on the bottom upright post through a flange; the first motor mounting frame is fixedly arranged at the bottom of the left side of the first motor mounting plate, the first stepping motor is fixedly arranged at the middle of the first motor mounting frame, and the power output shaft of the first stepping motor extends to the upper position of the first motor mounting plate; the support rod is vertically and fixedly arranged at the upper part of the left end of the first motor mounting plate, the upper part of the support rod is fixedly provided with a top plate, and the left end of the top plate is fixedly connected with the upper part of the support rod; the lower end of the lifting screw rod is fixedly connected with a power output shaft of the first stepping motor, the upper part of the lifting screw rod passes through the top plate and is fixedly arranged in the fixed seat, the fixed seat is fixedly arranged at the position, close to the left, of the upper part of the top plate, and the screw rod nut is sleeved on the lifting screw rod; the upper photoelectric sensor is fixedly arranged at the position, close to the right side of the upper part, of the supporting rod, the lower photoelectric sensor is fixedly arranged at the position, close to the right side of the lower part, of the supporting rod, and the photoelectric sensing piece is fixedly arranged at the left lower part of the rear side of the screw nut.
The motor mounting plate at the bottom of the lifting device is fixedly arranged at the upper end of the bottom upright post, and the right end of the top plate at the upper part of the lifting device is fixedly arranged at the upper end of the upper upright post and is fixed through the fixing flange.
The first stepping motor is connected with the PLC control program through a connecting wire, and the upper photoelectric sensor and the lower photoelectric sensor are connected with the PLC control program through connecting wires.
The upper photoelectric sensor and the lower photoelectric sensor are fixedly arranged on the side surface of the rear part of the supporting rod through a fixing plate; the upper photoelectric sensor, the lower photoelectric sensor and the photoelectric sensing piece are reserved with sensing intervals.
The rotary swinging device comprises a hollow rotary platform, the left end of the hollow rotary platform is arranged on the outer wall of the lower part of the screw nut, the right end of the hollow rotary platform is sleeved on the upper upright post, the square shell is fixedly arranged at the position, close to the left side, of the hollow rotary platform, and the square shell is a square empty shell with an opening on the right side; the second power output shaft of the stepping motor extends to the middle position of the square shell, the conical driving gear is fixedly arranged at the upper end part of the second power output shaft of the stepping motor, the conical driven gear is fixedly arranged at the upper position of the hollow rotary platform, the conical driven gear is fixedly arranged on the upper upright post, and the conical driving gear is meshed and connected with the conical driven gear; the flange linear bearing is fixedly arranged at the upper part of the conical driven gear; the proximity switch seat is of a semicircular structure and fixedly connected with the right bottom of the hollow rotary platform around the upper upright post; the first proximity switch is fixedly arranged at the front end position of the proximity switch seat, and the second proximity switch is fixedly arranged at the rear side position of the proximity switch seat; the proximity switch sensing piece is fixedly arranged at the middle position of the lower part of the fixing plate, and the proximity switch sensing piece corresponds to the first proximity switch and the second proximity switch on the proximity switch seat up and down.
The step motor II is fixedly connected with the PLC control program through a connecting wire, and the PLC control program controls the swing angle of the fixed plate through preset swing angle parameters.
The left end of the fixing plate is fixedly arranged at the middle position of the conical driven gear and the flange linear bearing, the left end of the fixing plate is sleeved on the upper upright post, and the right end of the fixing plate extends to the right side of the upper upright post.
The three-way connecting lead of the stepping motor is fixedly connected with the PLC control program, and the PLC control program is used for controlling the starting and stopping of the stepping motor.
The movable connecting device comprises a movable connecting handle, wherein the upper end and the lower end of the movable connecting handle are flat cylindrical, two inclined grooves are formed, one inclined groove is fixedly arranged at the right side of the upper end of the movable connecting handle, the other inclined groove is fixedly arranged at the right side of the lower end of the movable connecting handle, and the upper inclined groove and the lower inclined groove are in mirror symmetry; each inclined groove is provided with a fixed pin, the middle position of the upper part of the connecting handle is provided with a connecting groove, and the upper part of the connecting handle passes through the inclined groove at the lower end of the movable connecting handle and the connecting groove at the upper part of the connecting handle through the fixed pin to be riveted and fixed; the upper end of the movable connecting handle is inserted into the mounting groove at the bottom of the rotating shaft and is riveted and fixed through the inclined groove and the mounting groove at the upper part of the connecting handle by the fixing pin.
The viscosity measuring process of the high-temperature viscosity measuring instrument of the continuous casting mold flux comprises the following steps: 1. lifting process of measuring rod and measuring head: firstly, a first stepping motor is started through a man-machine interaction interface of a PLC control program, the first stepping motor rotates to drive a lifting screw rod to rotate, a hollow rotating platform of a rotary swinging device and a fixed plate are driven to lift upwards by utilizing the engagement of external threads of the lifting screw rod and internal threads of a screw rod nut, so that a third stepping motor, a torque sensor, a measuring rod and a measuring head are driven to lift upwards through the lifting of the fixed plate, when a photoelectric sensing piece is lifted to a position of the photoelectric sensing piece, the photoelectric sensing piece converts an analog signal of the sensed photoelectric sensing piece into an electric signal and transmits the electric signal to the PLC control program, the PLC control program transmits a stop control instruction to the first stepping motor, the first stepping motor stops, and the measuring rod and the measuring head are lifted to the maximum position; the descending action process of the measuring rod and the measuring head is opposite to the lifting action of the measuring rod and the measuring head. 2. Swing process of measuring rod and measuring head: after the viscosity of the continuous casting mold flux is measured, firstly, lifting the measuring rod and the measuring head by using lifting actions of the measuring rod and the measuring head, after the measuring rod and the measuring head leave a measured continuous casting mold flux sample, sending a control instruction for controlling starting to a stepping motor II of a rotary swinging device through a man-machine interaction interface of a PLC control program, starting to rotate the stepping motor II, driving a conical driving gear to rotate by the rotation of a power output shaft of the stepping motor II, driving the conical driven gear to rotate by using meshing transmission of the conical driving gear and the conical driven gear, driving a flange linear bearing to rotate under the rotation of the conical driven gear, finally driving a fixed plate to swing by taking an upper upright post as a center, and when the fixed plate swings to a position close to a first switch, converting a received analog induction signal into an induction electric signal, transmitting the induction signal to the PLC control program, and stopping the rotation of the stepping motor II by the PLC control program, so that the fixed plate stops swinging; when the proximity switch sensing piece is in sensing contact with the proximity switch II, the control action is repeated, so that the control swing action of the fixed plate can be realized; the PLC control program can also control the rotation angle of the stepping motor II through preset measuring rod and measuring head swing parameters, so that the automatic control of the measuring rod and measuring head swing angles is realized. 3. And (3) measuring the viscosity of a continuous casting mold flux sample: when the heating furnace heats a continuous casting mold flux sample to the temperature required by a measuring process, the continuous casting mold flux sample is in a molten state, at the moment, a measuring rod and a measuring head are utilized to automatically and accurately descend, the measuring rod and the measuring head are inserted into a graphite crucible in a hearth of the heating furnace, at the moment, a control command of automatic starting is sent to a stepping motor III by a PLC control program, the stepping motor III rotates, a rotating shaft of a torque sensor is driven to rotate by a power output shaft of the stepping motor III under the rotation of the stepping motor III, a side rod and the measuring head are driven to rotate by a movable connecting device under the driving of the rotating shaft, the measuring rod and the measuring head are matched with the movable connecting device to form a vertical state under the gravity action of the weight of the measuring head, the rotating torque sensor detects the rotating torque force of the measuring head, the rotating torque value is transmitted to a PLC control program, the PLC control program continuously receives the torque pulse signals of the measuring rod and the measuring head, the time difference of the torque pulse signals of the measuring rod and the measuring head is counted, the PLC control program calculates the time difference of the torque pulse signals of the measuring rod and the viscosity pulse signals according to the torque pulse signal time difference, and the value of the torque pulse signals of the measuring rod and the viscosity pulse signals, and the value of the continuous casting mold flux is calculated, and the value of a protection formula is calculated; after the viscosity measurement of the continuous casting mold flux sample is finished, the measuring rod and the measuring head are lifted up through automatic and accurate lifting actions of the measuring rod and the measuring head, and after a certain distance is left on the upper portion of the heating furnace, the measuring rod and the measuring head are controlled to leave the position right above the heating furnace through swinging of the measuring rod and the measuring head, and finally the viscosity measurement of the continuous casting mold flux is finished.
The lifting device comprises a first motor mounting plate which is fixedly arranged at the upper end position of the bottom upright post, and the first motor mounting plate is fixed on the bottom upright post through a fixed flange; the first motor mounting frame is fixedly arranged at the bottom of the left side of the first motor mounting plate, the first stepping motor is fixedly arranged at the middle of the first motor mounting frame, and the power output shaft of the first stepping motor extends to the upper position of the first motor mounting plate; the support rod is vertically and fixedly arranged at the upper part of the left end of the first motor mounting plate, the upper part of the support rod is fixedly provided with a top plate, and the left end of the top plate is fixedly connected with the upper part of the support rod; the lower end of the lifting screw rod is fixedly connected with a power output shaft of the first stepping motor, the upper part of the lifting screw rod passes through the top plate and is fixedly arranged in the fixed seat, the fixed seat is fixedly arranged at the position, close to the left, of the upper part of the top plate, and the screw rod nut is sleeved on the lifting screw rod; the upper photoelectric sensor is fixedly arranged at the position, close to the right side of the upper part, of the supporting rod, the lower photoelectric sensor is fixedly arranged at the position, close to the right side of the lower part, of the supporting rod, and the photoelectric sensing piece is fixedly arranged at the left lower part of the rear side of the screw nut. The main purpose of this arrangement is: on one hand, the lifting device is arranged to realize the lifting or descending of the upper and lower positions of the fixed plate, the measuring rod and the measuring head; on the other hand, through the cooperation of hoisting device and last photoelectric sensor, lower photoelectric sensor, photoelectric sensing piece and PLC control program, realized the accurate control to measuring staff and gauge head lift position, realized simultaneously that measuring staff and gauge head are located automatic lift to finally realized measuring staff and gauge head insert the accurate control of heating furnace stone mill crucible degree of depth, reduced the viscosity measurement error.
The rotary swinging device comprises a hollow rotary platform, the left end of the hollow rotary platform is arranged on the outer wall of the lower part of the screw nut, the right end of the hollow rotary platform is sleeved on the upper upright post, the square shell is fixedly arranged at the position, close to the left side, of the hollow rotary platform, and the square shell is a square empty shell with an opening on the right side; the second power output shaft of the stepping motor extends to the middle position of the square shell, the conical driving gear is fixedly arranged at the upper end part of the second power output shaft of the stepping motor, the conical driven gear is fixedly arranged at the upper position of the hollow rotary platform, the conical driven gear is fixedly arranged on the upper upright post, and the conical driving gear is meshed and connected with the conical driven gear; the flange linear bearing is fixedly arranged at the upper part of the conical driven gear; the proximity switch seat is of a semicircular structure and fixedly connected with the right bottom of the hollow rotary platform around the upper upright post; the first proximity switch is fixedly arranged at the front end position of the proximity switch seat, and the second proximity switch is fixedly arranged at the rear side position of the proximity switch seat; the proximity switch sensing piece is fixedly arranged at the middle position of the lower part of the fixing plate, and the proximity switch sensing piece corresponds to the first proximity switch and the second proximity switch on the proximity switch seat up and down. The main purpose of this arrangement is: on one hand, the swing of the front and back positions of the measuring rod and the measuring head is realized through the arrangement of the rotary swinging device, and on the other hand, the automatic control of the swing of the measuring rod and the measuring head can be realized through the control of the swing angle of the measuring rod and the measuring head through the cooperation of the rotary swinging device, the first proximity switch, the second proximity switch, the proximity switch sensing piece and the PLC control program and the preset swing angle parameters of the measuring rod and the measuring head through the PLC control program.
The upper part of the right end of the fixed plate is fixedly provided with a motor mounting frame II, a stepping motor III is fixedly arranged at the central position of the motor mounting frame II, a power output shaft of the stepping motor III penetrates through the right end of the fixed plate to extend to the lower part, a rotating shaft is a central shaft of a torque sensor, the upper part of the rotating shaft is fixedly connected with the power output shaft of the stepping motor III, and the lower part of the rotating shaft is provided with a mounting groove; the torque sensor is fixedly arranged at the lower part of a power output shaft of the stepping motor III, the lower part of the rotating shaft is fixedly provided with a movable connecting device, the measuring rod is fixedly arranged at the lower part of the movable connecting device, and the lower part of the measuring rod is fixedly provided with a measuring head. The main purpose of the step motor III is that: the stepping motor III is utilized to provide rotation power for the measuring rod and the measuring head, and an important rotation condition is provided for measuring the high-temperature viscosity of the continuous casting covering slag. The main purpose of the arrangement of the rotation shaft and the torque sensor is: on the one hand, through the arrangement of the torque sensor, the rotary cutting resistance of the measuring head at the bottom of the measuring rod in the molten continuous casting mold flux can be detected, and necessary conditions are provided for measuring the high-temperature viscosity of the continuous casting mold flux; on the other hand, through the cooperation of torque sensor and PLC control program, can constantly receive the measuring staff that torque sensor detected and gauge head torque pulse signal time difference in certain viscosity measurement time to the viscosity value of continuous casting mold flux is calculated through PLC control program automation. The main purpose of the movable connecting device is that: through the arrangement of the movable connecting device, a flexible movable connecting structure is formed between the measuring rod and the rotating shaft of the torque sensor; on one hand, radial vibration of the measuring rod caused by radial vibration of the stepping motor III can be reduced, and the vertical stability of the measuring rod and the measuring head is improved; on the other hand, under the traction of the self gravity of the measuring head, a flexible movable connection structure is formed by matching with a movable connection device between the measuring rod and the rotating shaft, so that the perpendicularity of the measuring rod and the measuring head is improved, and the equipment constant error of viscosity measurement is reduced.
The three-way connecting lead of the stepping motor is fixedly connected with the PLC control program, and the PLC control program is used for controlling the starting and stopping of the stepping motor. The main purpose of this arrangement is: on one hand, the automatic control of the stepping motor III is realized through a PLC control program, so that the accurate control of the rotation of the measuring rod and the measuring head is improved; on the other hand, under the cooperation of a PLC control program and a torque sensor, the rotary cutting resistance detection of the measuring head in the molten continuous casting mold flux is realized; in still another aspect, under the cooperation of the PLC control program and the torque sensor, the time difference of the probe torque pulse signal can be continuously received and counted in the time period of the continuous casting mold flux viscosity measurement.
The movable connecting device comprises a movable connecting handle, wherein the upper end and the lower end of the movable connecting handle are flat cylindrical, two inclined grooves are formed, one inclined groove is fixedly arranged at the right side of the upper end of the movable connecting handle, the other inclined groove is fixedly arranged at the right side of the lower end of the movable connecting handle, and the upper inclined groove and the lower inclined groove are in mirror symmetry; each inclined groove is provided with a fixed pin, the middle position of the upper part of the connecting handle is provided with a connecting groove, and the upper part of the connecting handle passes through the inclined groove at the lower end of the movable connecting handle and the connecting groove at the upper part of the connecting handle through the fixed pin to be riveted and fixed; the upper end of the movable connecting handle is inserted into the mounting groove at the bottom of the rotating shaft and is riveted and fixed through the inclined groove and the mounting groove at the upper part of the connecting handle by the fixing pin. The main purpose of the arrangement is that on one hand, radial swing of the measuring rod caused by radial vibration of the stepping motor III can be reduced, and the vertical stability of the measuring rod and the measuring head is improved; on the other hand, under the traction of the gravity of the measuring head, a flexible movable connection structure is formed by matching with a movable connection device between the measuring rod and the rotating shaft, so that the perpendicularity of the measuring rod and the measuring head is improved, and the equipment constant error of viscosity measurement is reduced; in still another aspect, only in the case where the measuring rod and the measuring head are kept vertical, when the measuring rod and the measuring head are inserted into the graphite crucible of the heating furnace, the alignment degree of the measuring head and the stone mill crucible mouth is improved, but the measuring rod and the measuring head are inserted more accurately, and the control accuracy of the action of inserting the measuring rod and the measuring head into the stone mill crucible is improved.
The invention has the beneficial effects that: the invention provides a high-temperature viscosity tester for continuous casting mold flux, which has scientific and reasonable design structure, convenient operation and high degree of automation; the automatic accurate control of the viscosity measuring instrument is realized, the accuracy of measuring the viscosity of the viscosity measuring instrument is improved, the mobility of the connection of the torque sensor and the measuring rod is improved, the verticality of the side rod and the measuring head is improved, the accurate control of the insertion depth of the measuring head of the measuring rod is realized, and the viscosity measuring error is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the lifting device and the rotary swing device of the present invention;
FIG. 3 is an enlarged view of a portion of the lift and swivel arrangement of the present invention;
FIG. 4 is an internal structural view between a bevel drive gear and a bevel driven gear according to the present invention
FIG. 5 is a schematic view of the structure of the articulating mechanism of the present invention;
the marks in the figure: 1. the device comprises a bracket, 2, a heating furnace, 3, a base, 4, a bottom upright, 5, an upper upright, 6, a fixed flange, 7, a lifting device, 71, a motor mounting plate I, 72, a flange, 73, a motor mounting bracket I, 74, a stepping motor I, 75, a supporting rod, 76, a lifting screw, 77, a top plate, 78, a fixed seat, 79, a screw nut, 710, an upper photoelectric sensor, 711, a lower photoelectric sensor, 712, a photoelectric sensing piece, 8, a rotary swinging device, 81, a hollow rotating platform, 82, a stepping motor II, 83, a square shell, 84, a conical driving gear, 85, a conical driven gear, 86, a flange linear bearing, 87, a proximity switch seat, 88, a proximity switch I, 89, a proximity switch II, 810, a proximity switch sensing piece, 9, a fixed plate, 10, a stepping motor III, 11, a motor mounting bracket II, 12, a rotating shaft, 13, a mounting groove, 14, a torque sensor, 15, a movable connecting device, 151, a movable connecting handle, 152, a tilting groove, 153, a fixed pin, 154, a connecting handle, 155, a connecting groove, 16, a measuring head 17, and measuring rod.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
As shown in the figure, the invention provides a high-temperature viscosity tester for continuous casting mold flux, which comprises a bracket 1, a heating furnace 2 and a base 3; the support 1 is of a square structure, a base 3 is fixedly arranged at the left side of the upper part of the support 1, a heating furnace 2 is fixedly arranged at the right side of the base 3, the heating furnace 2 is used for carrying out high-temperature melting on continuous casting mold flux, a bottom upright post 4 is fixedly arranged at the upper part of the base 3, and an upper upright post 5 is fixedly arranged at the upper part of the bottom upright post 4; the bottom of the lifting device 7 is fixedly arranged at the upper end position of the bottom upright post 4, and the upper part of the lifting device 7 is fixedly arranged at the upper end of the upper upright post 5 and is fixed through the fixing flange 6; the left side of the rotary swinging device 8 is arranged on the lifting device 7, and the right side of the rotary swinging device 8 is sleeved on the upper upright post 5; the fixed plate 9 is fixedly arranged at a position close to the upper part of the upper upright post 5, the left end of the fixed plate 9 is fixedly arranged at the middle position of the rotary swinging device 8, the upper part of the right end of the fixed plate 9 is fixedly provided with a second motor mounting frame 11, a third stepping motor 10 is fixedly arranged at the center position of the second motor mounting frame 11, a power output shaft of the third stepping motor 10 penetrates through the right end of the fixed plate 9 to extend to the lower part, a rotary shaft 12 is a central shaft of the torque sensor 14, the upper part of the rotary shaft 12 is fixedly connected with the power output shaft of the third stepping motor 10, and a mounting groove 13 is formed in the lower part of the rotary shaft 12; the torque sensor 14 is fixedly arranged at the lower part of a power output shaft of the stepping motor III 8, the movable connecting device 15 is fixedly arranged at the lower part of the rotating shaft 12, the measuring rod 16 is fixedly arranged at the lower part of the movable connecting device 15, and the measuring head 17 is fixedly arranged at the lower part of the measuring rod 16.
The lifting device 7 comprises a first motor mounting plate 71, the first motor mounting plate 71 is fixedly arranged at the upper end position of the bottom upright post 4, and the first motor mounting plate 71 is fixed on the bottom upright post 4 through a flange 72; the first motor mounting frame 73 is fixedly arranged at the left bottom of the first motor mounting plate 71, the first stepping motor 74 is fixedly arranged at the middle of the first motor mounting frame 73, and the power output shaft of the first stepping motor 74 extends to the upper position of the first motor mounting plate 71; the supporting rod 75 is vertically and fixedly arranged at the upper part of the left end of the first motor mounting plate 71, a top plate 77 is fixedly arranged at the upper part of the supporting rod 75, and the left end of the top plate 77 is fixedly connected with the upper part of the supporting rod 75; the lower end of the lifting screw rod 76 is fixedly connected with a power output shaft of the first stepping motor 74, the upper part of the lifting screw rod 76 passes through the top plate 77 and is fixedly arranged in the fixed seat 78, the fixed seat 78 is fixedly arranged at the position, close to the left, of the upper part of the top plate 77, and the screw rod nut 79 is sleeved on the lifting screw rod 75; the upper photoelectric sensor 710 is fixedly disposed at a position of the support bar 75 near the upper right side, the lower photoelectric sensor 711 is fixedly disposed at a position of the support bar 75 near the lower right side, and the photoelectric sensing piece 712 is fixedly disposed at a position of the rear left lower side of the screw nut 79.
The first motor mounting plate 71 at the bottom of the lifting device 7 is fixedly arranged at the upper end position of the bottom upright post 4, and the right end of the upper top plate 77 of the lifting device 7 is fixedly arranged at the upper end of the upper upright post 5 and is fixed through the fixing flange 6.
The first stepper motor 74 is connected with the PLC control program through a connecting wire, and the upper photoelectric sensor 710 and the lower photoelectric sensor 711 are connected with the PLC control program through connecting wires.
The upper and lower photosensors 710 and 711 are fixedly provided on the rear side of the support lever 75 by a fixing plate 9; the upper and lower photosensors 710 and 711 and the photo sensing sheet 712 are reserved with sensing pitches.
The rotary swinging device 8 comprises a hollow rotary platform 81, the left end of the hollow rotary platform 81 is arranged on the outer wall of the lower part of the screw nut 79, the right end of the hollow rotary platform 71 is sleeved on the upper upright post 5, a square shell 83 is fixedly arranged at the position, close to the left side, of the hollow rotary platform 81, and the square shell 83 is a square empty shell with an opening on the right side; the second stepping motor 82 is fixedly arranged at the middle position of the bottom of the square shell 83, the power output shaft of the second stepping motor 82 extends to the middle position of the square shell 83, the conical driving gear 84 is fixedly arranged at the upper end part of the power output shaft of the second stepping motor 82, the conical driven gear 85 is fixedly arranged at the upper position of the hollow rotating platform 81, the conical driven gear 85 is fixedly arranged on the upper upright post 5, and the conical driving gear 84 is in meshed connection with the conical driven gear 85; the flange linear bearing 86 is fixedly arranged at the upper part of the conical driven gear 85; the proximity switch seat 87 is of a semicircular structure, and the proximity switch seat 87 surrounds the upper upright post 5 and is fixedly connected with the right bottom of the hollow rotary platform 81; the first proximity switch 88 is fixedly arranged at the front end position of the proximity switch seat 87, and the second proximity switch 89 is fixedly arranged at the rear side position of the proximity switch seat 87; the proximity switch sensing piece 810 is fixedly arranged at the middle position of the lower part of the fixed plate 9, and the positions of the proximity switch sensing piece 810 and the first proximity switch 88 and the second proximity switch 89 on the proximity switch seat 87 are vertically corresponding.
The second stepper motor 82 is fixedly connected with a PLC control program through a connecting wire, and the PLC control program controls the swing angle of the fixed plate 9 through preset swing angle parameters.
The left end of the fixed plate 9 is fixedly arranged at the middle position of the conical driven gear 85 and the flange linear bearing 86, the left end of the fixed plate 9 is sleeved on the upper upright 5, and the right end of the fixed plate 9 extends to the right side of the upper upright 5.
The third stepper motor 10 is fixedly connected with a PLC control program through a connecting wire, and the PLC control program is used for controlling the starting and stopping of the third stepper motor 10.
The movable connecting device 15 comprises a movable connecting handle 151, wherein the upper end and the lower end of the movable connecting handle 151 are flat cylindrical, two inclined grooves 152 are arranged, one inclined groove is fixedly arranged at the right side position of the upper end of the movable connecting handle 151, the other inclined groove is fixedly arranged at the right side position of the lower end of the movable connecting handle 151, and the upper inclined groove 152 and the lower inclined groove 153 are in mirror symmetry; a fixing pin 153 is arranged in each inclined groove 152, a connecting groove 155 is arranged at the middle position of the upper part of the connecting handle 154, and the upper part of the connecting handle 154 is riveted and fixed through the inclined groove 152 at the lower end of the movable connecting handle 151 and the connecting groove 155 at the upper part of the connecting handle 154 by the fixing pin 153; the upper end of the movable connection handle 151 is inserted into the installation groove 13 at the bottom of the rotation shaft 12, and is riveted and fixed by a fixing pin 153 through the inclined groove 152 at the upper portion of the connection handle 154 and the installation groove 13.
The viscosity measuring process of the high-temperature viscosity measuring instrument of the continuous casting mold flux comprises the following steps: 1. lifting process of measuring rod and measuring head: firstly, a first stepping motor 74 is started through a man-machine interaction interface of a PLC control program, the rotation of the first stepping motor 74 drives a lifting screw rod 76 to rotate, the hollow rotating platform 81 of the rotary swinging device 8 and the fixed plate 9 are driven to lift upwards by utilizing the engagement of the external thread of the lifting screw rod 76 and the internal thread of a screw rod nut 79, so that a third stepping motor 10, a torque sensor 14, a measuring rod 16 and a measuring head 17 are driven to lift upwards by lifting of the fixed plate 9, when a photoelectric sensing piece 712 is lifted to a position of a photoelectric sensor 710, the photoelectric sensor 710 converts an analog signal of the sensed photoelectric sensing piece 712 into an electric signal and transmits the electric signal to the PLC control program, the PLC control program transmits a stop control instruction to the first stepping motor 74, and the first stepping motor 74 stops, and the measuring rod 16 and the measuring head 17 are lifted to the maximum position; the lowering operation of the spindle 16 and the stylus 17 may be opposite to the lifting operation of the spindle 16 and the stylus 17. 2. Swing process of measuring rod and measuring head: after the viscosity of the continuous casting mold flux is measured, firstly, the measuring rod 16 and the measuring head 17 are lifted by utilizing the lifting action of the measuring rod 16 and the measuring head 17, when the measuring rod 16 and the measuring head 17 leave a measured continuous casting mold flux sample, a control instruction for controlling starting is sent to a stepping motor 82 of a rotary swinging device 8 through a man-machine interaction interface of a PLC control program, the stepping motor 82 starts to rotate, a power output shaft of the stepping motor 82 rotates to drive a conical driving gear 84 to rotate, the conical driven gear 85 is driven to rotate by utilizing the meshing transmission of the conical driving gear 84 and a conical driven gear 85, the conical driven gear 85 is driven to rotate, a flange linear bearing 86 is driven to rotate under the rotation of the conical driven gear 85, so that finally, the upper upright post 5 of the fixed plate 9 is driven to swing by taking the upright post 5 as the center, when the fixed plate 9 swings to the position of the proximity switch 88, the proximity switch sensing piece 810 positioned at the bottom of the fixed plate 9 is in a sensing contact with the proximity switch 88, the received analog sensing signal is converted into a sensing electric signal by the proximity switch 88, the sensing electric signal is transmitted to the PLC control program, and the PLC control program sends a stop control instruction to the stepping motor 82, so that the stepping motor 82 stops rotating, and the stepping motor 82 stops swinging; when the proximity switch sensing piece 810 is in sensing contact with the proximity switch II 89, the control action is repeated, so that the control swinging action of the fixed plate 9 can be realized; the PLC control program can also control the rotation angle of the stepping motor II 82 through preset swing parameters of the measuring rod 16 and the measuring head 17, so as to realize automatic control of the swing angles of the measuring rod 16 and the measuring head 17. 3. And (3) measuring the viscosity of a continuous casting mold flux sample: when the heating furnace 2 heats a continuous casting mold flux sample to the temperature required by a measuring process, the continuous casting mold flux sample is in a molten state, at the moment, the measuring rod 16 and the measuring head 17 are automatically and accurately lowered, the measuring rod 16 and the measuring head 17 are inserted into a graphite crucible in a hearth of the heating furnace 2, at the moment, a control command for automatic starting is sent to the stepping motor III 10 by a PLC control program, the stepping motor III 10 rotates, a power output shaft of the stepping motor III 10 drives a rotating shaft 12 of a torque sensor 14 to rotate under the rotation of the stepping motor III 10, a side rod 16 and the measuring head 17 are driven to rotate by a movable connecting device 15 under the driving of the rotating shaft 12, the measuring rod 16 and the measuring head 17 are matched with the movable connecting device 15 to form a vertical state under the gravity action of the self weight of the measuring head 17, the measuring head 17 and the molten continuous casting mold flux sample generate rotary cutting force under the action of rotation, the rotating torque force of the measuring head 17 is detected by the torque sensor 14, the rotary torque value is transmitted to the PLC control program, the PLC control program receives torque pulse signals of the measuring rod 16 and the measuring head 17 continuously, the measuring head 17 is calculated, the viscosity pulse signals of the measuring rod 16 and the measuring head 17 are calculated, and the viscosity pulse time difference value of the measuring rod 16 and the measuring head 17 is calculated according to the torque pulse signal is calculated, and the time difference value of the measuring torque pulse signal is calculated according to the equation; after the viscosity measurement of the continuous casting mold flux sample is completed, the measuring rod 16 and the measuring head 17 are lifted up through the automatic and accurate lifting action of the measuring rod 16 and the measuring head 17, and after a certain distance from the upper part of the heating furnace 2, the measuring rod 16 and the measuring head 17 are separated from the position right above the heating furnace 2 through the swinging control action of the measuring rod 16 and the measuring head 17, and finally the viscosity measurement of the continuous casting mold flux is completed.
Various modifications to the embodiments described above will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A high-temperature viscosity tester for continuous casting mold flux comprises a bracket, a heating furnace and a base; the support is of a square structure, a base is fixedly arranged at the left side of the upper part of the support, a heating furnace is fixedly arranged at the right side of the base, the heating furnace is used for carrying out high-temperature melting on continuous casting mold flux, a bottom upright post is fixedly arranged at the upper part of the base, and an upper upright post is fixedly arranged at the upper part of the bottom upright post; the method is characterized in that: the bottom of the lifting device is fixedly arranged at the upper end of the bottom upright post, and the upper part of the lifting device is fixedly arranged at the upper end of the upper upright post and is fixed through a fixing flange; the lifting device comprises a first motor mounting plate which is fixedly arranged at the upper end position of the bottom upright post, and the first motor mounting plate is fixed on the bottom upright post through a flange; the first motor mounting frame is fixedly arranged at the bottom of the left side of the first motor mounting plate, the first stepping motor is fixedly arranged at the middle of the first motor mounting frame, and the power output shaft of the first stepping motor extends to the upper position of the first motor mounting plate; the support rod is vertically and fixedly arranged at the upper part of the left end of the first motor mounting plate, the upper part of the support rod is fixedly provided with a top plate, and the left end of the top plate is fixedly connected with the upper part of the support rod; the lower end of the lifting screw rod is fixedly connected with a power output shaft of the first stepping motor, the upper part of the lifting screw rod passes through the top plate and is fixedly arranged in the fixed seat, the fixed seat is fixedly arranged at the position, close to the left, of the upper part of the top plate, and the screw rod nut is sleeved on the lifting screw rod; the upper photoelectric sensor is fixedly arranged at the right side position of the support rod close to the upper part, the lower photoelectric sensor is fixedly arranged at the right side position of the support rod close to the lower part, and the photoelectric sensing piece is fixedly arranged at the left lower part of the rear side of the screw nut; the left side of the rotary swinging device is arranged on the lifting device, and the right side of the rotary swinging device is sleeved on the upper upright post; the rotary swinging device comprises a hollow rotary platform, the left end of the hollow rotary platform is arranged on the outer wall of the lower part of the screw nut, the right end of the hollow rotary platform is sleeved on the upper upright post, the square shell is fixedly arranged at the position, close to the left side, of the hollow rotary platform, and the square shell is a square empty shell with an opening on the right side; the second power output shaft of the stepping motor extends to the middle position of the square shell, the conical driving gear is fixedly arranged at the upper end part of the second power output shaft of the stepping motor, the conical driven gear is fixedly arranged at the upper position of the hollow rotary platform, the conical driven gear is fixedly arranged on the upper upright post, and the conical driving gear is meshed and connected with the conical driven gear; the flange linear bearing is fixedly arranged at the upper part of the conical driven gear; the proximity switch seat is of a semicircular structure and fixedly connected with the right bottom of the hollow rotary platform around the upper upright post; the first proximity switch is fixedly arranged at the front end position of the proximity switch seat, and the second proximity switch is fixedly arranged at the rear side position of the proximity switch seat; the proximity switch sensing piece is fixedly arranged at the middle position of the lower part of the fixed plate, and the proximity switch sensing piece corresponds to the first proximity switch and the second proximity switch on the proximity switch seat up and down; the fixed plate is fixedly arranged at a position close to the upper part of the upper upright post, the left end of the fixed plate is fixedly arranged at the middle position of the rotary swinging device, the upper part of the right end of the fixed plate is fixedly provided with a motor mounting frame II, a stepping motor III is fixedly arranged at the central position of the motor mounting frame II, a power output shaft of the stepping motor III penetrates through the right end of the fixed plate to extend to the lower part, the rotating shaft is a central shaft of the torque sensor, the upper part of the rotating shaft is fixedly connected with the power output shaft of the stepping motor III, and the lower part of the rotating shaft is provided with a mounting groove; the torque sensor is fixedly arranged at the lower part of a power output shaft of the stepping motor III, the lower part of the rotating shaft is fixedly provided with a movable connecting device, the measuring rod is fixedly arranged at the lower part of the movable connecting device, the movable connecting device comprises a movable connecting handle, the upper end and the lower end of the movable connecting handle are flat cylindrical, two inclined grooves are arranged, one inclined groove is fixedly arranged at the right side position of the upper end of the movable connecting handle, the other inclined groove is fixedly arranged at the right side position of the lower end of the movable connecting handle, and the upper inclined groove and the lower inclined groove are in mirror symmetry up and down; each inclined groove is provided with a fixed pin, the middle position of the upper part of the connecting handle is provided with a connecting groove, and the upper part of the connecting handle passes through the inclined groove at the lower end of the movable connecting handle and the connecting groove at the upper part of the connecting handle through the fixed pin to be riveted and fixed; the upper end of the movable connecting handle is inserted into the mounting groove at the bottom of the rotating shaft, and is riveted and fixed through the inclined groove and the mounting groove at the upper part of the connecting handle by a fixing pin; the lower part of the measuring rod is fixedly provided with a measuring head.
2. The high temperature viscosimeter of continuous casting mold flux according to claim 1, wherein: the motor mounting plate at the bottom of the lifting device is fixedly arranged at the upper end of the bottom upright post, and the right end of the top plate at the upper part of the lifting device is fixedly arranged at the upper end of the upper upright post and is fixed through the fixing flange.
3. The high temperature viscosimeter of continuous casting mold flux according to claim 2, wherein: the first stepping motor is connected with the PLC control program through a connecting wire, and the upper photoelectric sensor and the lower photoelectric sensor are connected with the PLC control program through connecting wires.
4. A high temperature viscosimeter for continuous casting mold flux according to claim 3, wherein: the upper photoelectric sensor and the lower photoelectric sensor are fixedly arranged on the side surface of the rear part of the supporting rod through a fixing plate; the upper photoelectric sensor, the lower photoelectric sensor and the photoelectric sensing piece are reserved with sensing intervals.
5. The high temperature viscosimeter of continuous casting mold flux according to claim 1, wherein: the step motor II is fixedly connected with the PLC control program through a connecting wire, and the PLC control program controls the swing angle of the fixed plate through preset swing angle parameters.
6. The high temperature viscosimeter of continuous casting mold flux according to claim 1, wherein: the left end of the fixing plate is fixedly arranged at the middle position of the conical driven gear and the flange linear bearing, the left end of the fixing plate is sleeved on the upper upright post, and the right end of the fixing plate extends to the right side of the upper upright post.
7. The high temperature viscosimeter of continuous casting mold flux according to claim 1, wherein: the three-way connecting lead of the stepping motor is fixedly connected with the PLC control program, and the PLC control program is used for controlling the starting and stopping of the stepping motor.
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