CN108693038B - Automatic load loading device and method for metallurgical or coked material performance measurement experiment - Google Patents
Automatic load loading device and method for metallurgical or coked material performance measurement experiment Download PDFInfo
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Abstract
The invention relates to a load automatic loading device and a load automatic loading method for metallurgy or coking material performance measurement experiments, wherein the load automatic loading device comprises a force loading and measuring mechanism, an upright column lifting mechanism and a rotating mechanism; the top of the upright post lifting mechanism is provided with a rotating mechanism and can drive the rotating mechanism to lift; the force loading and measuring mechanism consists of a fixed support, a pressure sensor, a loading head and a rotating shaft, wherein one end of the fixed support is fixedly connected with the rotating mechanism and can horizontally rotate within a set range under the driving of the rotating mechanism; the other end of the fixed support is provided with a rotating shaft, the middle part of the loading head is hinged with the rotating shaft, and the overhanging end is connected with the loading rod; the pressure sensor is arranged on the fixed support, one end of the bottom of the pressure sensor is fixedly connected with the fixed support through the sensor fixing seat, and the other end of the pressure sensor is fixedly connected with the loading head; the load value loaded by the invention can be adjusted according to the requirement, and the device has compact structure and small volume, and is suitable for being matched with various experimental instruments and equipment.
Description
Technical Field
The invention relates to the technical field of material performance detection, in particular to an automatic load loading device and method for a metallurgical or coking material performance measurement experiment.
Background
When the test of iron ore reduction soft melting dripping performance measurement, iron ore load reducibility measurement and coal carbonization process performance detection under load conditions is carried out, a certain load weight is required to be given to a sample in the measurement process, so that the purpose of carrying out process measurement on the sample under the action of a certain force is realized. At present, most of detection equipment for carrying out the experiments adopts a static load method to realize load loading. The dead load is that a physical weight (weight) is directly applied to the sample according to the required weight (pressure), and the method can complete the experiment, but the volume and the weight of the weight are large, for example, the load weight of an iron ore soft melting drop furnace reaches more than tens of kilograms, some equipment needs to reach 200kg or more, and the equipment structure is huge; meanwhile, the weight is generally placed at the highest position of the equipment, the stability requirement on the physical structure of the equipment is high, and the labor intensity of operators in the experimental process is high. When some experimental processes require load weight adjustment, the static loading method cannot meet the experimental requirements at all, so that the application of expensive experimental equipment is limited.
In addition, in some special experiments, such as coal carbonization experiments, the load values of different temperature conditions are required to be automatically adjusted under certain process conditions, and the static loading method cannot meet the requirements even under the condition that the load values are required to be dynamically adjusted under the experimental conditions.
Disclosure of Invention
The invention provides an automatic load loading device and method for metallurgical or coking material performance measurement experiments, wherein the load value of the load can be adjusted according to the needs, and the device has compact structure and small volume, and is suitable for being matched with various experimental instruments and equipment.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the automatic load loading device for the metallurgical or coking material performance measurement experiment is arranged at one side of an experiment furnace, the experiment furnace consists of a furnace body, a hearth pipe and a loading rod, the lower part of the hearth pipe is provided with a bearing disc for bearing a sample, and the bottom of the loading rod extends into the hearth pipe and is connected with a pressure disc for applying pressure to the sample; the automatic load loading device comprises a force loading and measuring mechanism, a stand column lifting mechanism and a rotating mechanism; the top of the upright post lifting mechanism is provided with a rotating mechanism and can drive the rotating mechanism to lift; the force loading and measuring mechanism consists of a fixed support, a pressure sensor, a loading head and a rotating shaft, wherein one end of the fixed support is fixedly connected with the rotating mechanism and can horizontally rotate within a set range under the driving of the rotating mechanism; the other end of the fixed support is provided with a horizontal rotating shaft, the middle part of the loading head is hinged with the rotating shaft and can rotate around the rotating shaft, one end of the loading head extends out of the fixed support, the extending end is connected with the loading rod, and the other end of the loading head extends above the fixed support; the pressure sensor is arranged on the fixed support, one end of the bottom of the pressure sensor is fixedly connected with the fixed support through the sensor fixing seat, and the other end of the bottom of the pressure sensor is fixedly connected with the corresponding end of the loading head; the distance L from the center of the loading rod to the center of the rotating shaft is larger than the distance L1 from the center of the rotating shaft to the fixed center of the pressure sensor and the loading head, L=nL1, and n is more than or equal to 2 and is a positive integer.
The upright post lifting mechanism comprises an upright post, a torque motor, a screw rod, a screw nut anti-rotation block and a lifting arm, wherein the torque motor, the screw nut anti-rotation block and the lifting arm are arranged in the upright post; the torque motor is fixed at the bottom of the upright post through a torque motor seat, an output shaft of the torque motor is connected with the bottom end of the screw rod through a coupler and a connecting piece, and the bottom of the screw rod is supported and fixed in the upright post through a screw rod bearing; the upper part of the screw rod is connected with a screw nut in a matched manner, the screw nut is connected with a lifting arm through a screw nut anti-rotation block, the torque motor drives the screw rod to rotate and drives the lifting arm through the screw nut to realize lifting action, and a sliding bearing is arranged between the lifting arm and the upright post; the rotating mechanism is arranged on the lifting arm.
The rotating mechanism comprises a displacement motor, a displacement motor seat, an outer rotating arm, a support bearing and a support bearing seat; the displacement motor is fixed at the top of the displacement motor seat, the axis of the displacement motor seat coincides with the axis of the upright post, the bottom plate of the displacement motor seat is fixedly connected with the top of the lifting arm, the bottom plate of the displacement motor seat is provided with a support bearing seat, and the output shaft of the displacement motor is supported by a support bearing in the support bearing seat; the outer rotating arm is sleeved on the outer side of the upper part of the lifting arm, the top of the outer rotating arm is connected with the output shaft of the displacement motor through a rotating connecting piece, and the outer rotating arm can rotate around the axis of the displacement motor under the driving of the displacement motor; the outer rotating arm and the lifting arm are supported by the upper rotating arm upper bearing and the lower rotating arm lower bearing to realize relative rotation; and a fixed support in the force loading and measuring mechanism is fixedly connected with the outer rotating arm.
The torque motor is one of a servo motor, a stepping motor or a direct current motor.
The displacement motor is a stepping motor.
The pressure sensor is an S-shaped pressure sensor or a cantilever beam type pressure sensor.
The fixed support consists of a horizontal seat plate and an inclined support, and the horizontal seat plate and the inclined support are respectively and fixedly connected with an outer rotating arm in the rotating mechanism to form a triangular supporting structure.
The automatic load device for the metallurgical or coking material performance measurement experiment further comprises a base, wherein the bottoms of the experiment furnace and the stand column are fixed on the base, and the stand column is fixed through a stand column fixing flange.
The top of the loading rod is provided with a bearing table, the corresponding position of the loading head is provided with an arc-shaped groove, the opening size of the arc-shaped groove is larger than the diameter of the loading rod, and the diameter of the arc-shaped groove is smaller than the diameter of the bearing table.
The automatic load method for the metallurgical or coking material performance measurement experiment adopts a load automatic load device for loading; the method specifically comprises the following steps:
1) When an experiment starts, adding a sample to a bearing disc of a hearth pipe, and installing a loading rod; then starting a torque motor, driving a rotating mechanism, a force loading and measuring mechanism to lift by a column lifting mechanism, and adjusting a loading head to the upper part of a loading rod; then starting a displacement motor to enable the loading head to rotate and then be connected with the loading rod in a matched manner;
2) Restarting the torque motor to enable the loading head to drive the loading rod to move downwards, and starting to apply pressure to the sample after the pressure disc contacts the sample; when the actual loading force is F, the reverse acting force F1 of the sample to the loading rod is F=F1, the reverse acting force F1 is transmitted to the loading head through the loading rod, one end of the loading head rotates around the rotating shaft after receiving the upward force F1, and the other end of the loading head applies the downward force F2 to the pressure sensor, wherein F2 = L/L1.F = nF;
3) The signal output end of the pressure sensor is connected with a control system, and the control system corrects and calculates the measured pressure value F2 to obtain the actual loading force F; a PID control algorithm is programmed in the control system, a target pressure value is set, and when the pressure value born by the sample is larger than the set target pressure value, the torque motor drives the loading head to move upwards, so that the loading force on the sample is reduced; when the sample contracts and the pressure value born by the sample is smaller than the set target pressure value, the torque motor drives the loading head to move downwards, so that the loading force on the sample is increased; the above process is circularly carried out, and in the circulation process, the actual loading force is ensured to reach the set target pressure value through PID real-time tracking control;
4) And correcting the set target pressure value in real time by a control system according to the temperature, time or other parameters in the experimental process.
Compared with the prior art, the invention has the beneficial effects that:
1) The torque motor is used as a power source of load loading force, so that the adjustment precision is high, and the adjustment process is simple and convenient;
2) The screw rod mechanism is adopted to convert the rotary motion of the torque motor into linear motion, so that the structure is compact, the volume is small, and the weight is light;
3) The pressure sensor is used for detecting the loading force, and the loading head adopts the lever principle, so that the structure is simple and exquisite;
4) The control system adopts PID closed-loop control to realize real-time control of the load loading force;
5) The magnitude of the load loading force can be accurately adjusted by combining temperature, time or other experimental conditions.
Drawings
FIG. 1 is a schematic perspective view of an automatic load-applying device for testing metallurgical or coking material properties according to the present invention.
Fig. 2 is a schematic view of the force loading and measuring mechanism of the present invention.
Fig. 3 is a schematic structural view of the column lifting mechanism and the rotating mechanism according to the present invention.
In the figure: 1. the force loading and measuring mechanism comprises a force loading mechanism 1-1, a shield 1-2, a rotating shaft 1-3, a loading head 1-4, bolts 1-5, a fixed support 1-6, a sensor fixing seat 1-7, a pressure sensor 2, a loading rod 3, a furnace tube 4, a furnace body 5, a pressure disk 6, a bearing disk 8, a base 9, a column fixing flange 10, a column lifting mechanism 10-1, a moment motor 10-2, a moment motor base 10-3, a coupler 10-4, a connecting piece 10-5, a screw rod bearing 10-6, a screw nut anti-rotation block 10-7, a screw nut 10-8, a screw rod 10-9, a column 10-10, a sliding bearing 10-11, a lifting arm 11, a rotating mechanism 11-1, a displacement motor 11-2, a displacement motor base 11-3, a support bearing 11-4, a support bearing seat 11-5, a connecting piece 11-6, an outer rotating arm 11-7, an upper rotating arm bearing 11-8, a rotating arm lower bearing
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1-3, the automatic load device for metallurgical or coking material performance measurement experiment is arranged at one side of an experiment furnace, the experiment furnace consists of a furnace body 4, a hearth pipe 3 and a load rod 2, a load bearing disc 7 is arranged at the lower part of the hearth pipe 3 and used for bearing a sample 6, and the bottom of the load rod 2 extends into the hearth pipe 3 and is connected with a pressure disc 5 and used for applying pressure to the sample 6; the automatic load loading device comprises a force loading mechanism 1, a measuring mechanism, a stand column lifting mechanism 10 and a rotating mechanism 11; the top of the upright post lifting mechanism 10 is provided with a rotating mechanism 11 and can drive the rotating mechanism 11 to lift; the force loading and measuring mechanism 1 consists of a fixed support 1-5, a pressure sensor 1-7, a loading head 1-3 and a rotating shaft 1-2, wherein one end of the fixed support 1-5 is fixedly connected with a rotating mechanism 11 and can horizontally rotate within a set range under the driving of the rotating mechanism 11; the other end of the fixed support 1-5 is provided with a horizontal rotating shaft 1-2, the middle part of the loading head 1-3 is hinged with the rotating shaft 1-2 and can rotate around the rotating shaft 1-2, one end of the loading head 1-3 extends out of the fixed support 1-5, the extending end is connected with the loading rod 1-2, and the other end of the loading head 1-3 extends above the fixed support 1-5; the pressure sensor 1-7 is arranged on the fixed support 1-5, one end of the bottom of the pressure sensor is fixedly connected with the fixed support 1-5 through the sensor fixing seat 1-6, and the other end of the pressure sensor is fixedly connected with the corresponding end of the loading head 1-3; the distance L from the center of the loading rod 2 to the center of the rotating shaft 1-2 is larger than the distance L1 from the center of the rotating shaft 1-2 to the fixed center of the pressure sensor 1-7 and the loading head 1-3, L=nL1, and n is more than or equal to 2 and is a positive integer.
The upright post lifting mechanism 10 comprises an upright post 10-9, a torque motor 10-1, a screw rod 10-8, a screw 10-7, a screw anti-rotation block 10-6 and a lifting arm 10-11 which are arranged in the upright post 10-9; the torque motor 10-1 is fixed at the bottom of the upright post 10-9 through a torque motor seat 10-2, an output shaft of the torque motor 10-1 is connected with the bottom end of the screw rod 10-8 through a coupler 10-3 and a connecting piece 10-4, and the bottom of the screw rod 10-8 is supported and fixed in the upright post 10-9 through a screw rod bearing 10-5; the upper part of the screw rod 10-8 is connected with the screw nut 10-7 in a matched manner, the screw nut 10-7 is connected with the lifting arm 10-11 through the screw nut anti-rotation block 10-6, the torque motor 10-1 drives the screw rod 10-8 to rotate and drives the lifting arm 10-11 through the screw nut 10-7 to realize lifting action, and a sliding bearing 10-10 is arranged between the lifting arm 10-11 and the upright post 10-9; the rotation mechanism 11 is mounted on the lifting arm 10-11.
The rotating mechanism 11 comprises a displacement motor 11-1, a displacement motor seat 11-2, an outer rotating arm 11-6, a support bearing 11-3 and a support bearing seat 11-4; the displacement motor 11-1 is fixed at the top of the displacement motor seat 11-2, the axis of the displacement motor seat is coincident with the axis of the upright post 10-9, the bottom plate of the displacement motor seat 11-2 is fixedly connected with the top of the lifting arm 10-11, the bottom plate of the displacement motor seat 11-2 is provided with a support bearing seat 11-4, and the output shaft of the displacement motor 11-1 is supported by a support bearing 11-3 in the support bearing seat 11-4; the outer rotating arm 11-6 is sleeved on the outer side of the upper part of the lifting arm 10-11, the top of the outer rotating arm 11-6 is connected with the output shaft of the displacement motor 11-1 through a rotating connecting piece 11-5, and the outer rotating arm 11-6 can rotate around the axis of the displacement motor 11-1 under the driving of the displacement motor 11-1; the outer radial arm 11-6 and the lifting arm 10-11 are supported by an upper radial arm upper bearing 11-7 and a lower radial arm lower bearing 11-8 to realize relative rotation; the fixed support 1-5 in the force loading and measuring mechanism 1 is fixedly connected with the outer rotating arm 11-6.
The torque motor 10-1 is one of a servo motor, a stepping motor or a direct current motor.
The displacement motor 11-1 is a stepping motor.
The pressure sensors 1-7 are S-shaped pressure sensors or cantilever-beam-type pressure sensors.
The fixed support 1-5 is composed of a horizontal seat plate and an inclined support, and the horizontal seat plate and the inclined support are respectively and fixedly connected with an outer rotating arm 11-6 in the rotating mechanism 11 to form a triangular support structure.
The automatic load loading device for the metallurgical or coking material performance measurement experiment further comprises a base 8, wherein the bottoms of the experiment furnace and the stand column 10-9 are fixed on the base 8, and the stand column 10-9 is fixed through a stand column fixing flange 9.
The top of the loading rod 2 is provided with a bearing table, the corresponding position of the loading head 1-3 is provided with an arc groove, the opening size of the arc groove is larger than the diameter of the loading rod 2, and the diameter of the arc groove is smaller than the diameter of the bearing table.
The automatic load method for the metallurgical or coking material performance measurement experiment adopts a load automatic load device for loading; the method specifically comprises the following steps:
1) When an experiment starts, adding a sample 6 to a bearing disc 7 of a hearth pipe 3, and installing a loading rod 2; then, starting a torque motor 10-1, driving a rotating mechanism 11 and a force loading and measuring mechanism 1 to lift by a column lifting mechanism 10, and adjusting a loading head 1-3 to be above a loading rod 2; then, the position-changing motor 11-1 is started to enable the loading head 1-3 to rotate and then to be connected with the loading rod 2 in a matching way;
2) Restarting the torque motor 10-1 to drive the loading rod 2 to move downwards by the loading head 1-3, and starting to apply pressure to the sample 6 after the pressure disc 5 contacts the sample 6; when the actual loading force is F, the reverse acting force F1 of the sample 6 to the loading rod 2 is f=f1, the reverse acting force F1 is transmitted to the loading head 1-3 through the loading rod 2, one end of the loading head 1-3 rotates around the rotating shaft 1-2 after receiving the upward force F1, the other end of the loading head 1-3 applies the downward force F2 to the pressure sensor 1-7, f2=l/l1·f=nf;
3) The signal output end 1-7 of the pressure sensor is connected with a control system, and the control system corrects and calculates the measured pressure value F2 to obtain the actual loading force F; a PID control algorithm is programmed in the control system, a target pressure value is set, and when the pressure value born by the sample 6 is larger than the set target pressure value, the torque motor 10-1 drives the loading head 1-3 to move upwards, so that the loading force on the sample 6 is reduced; when the sample 6 contracts and the pressure value of the sample is smaller than the set target pressure value, the torque motor 10-1 drives the loading head 1-3 to move downwards, so that the loading force on the sample 6 is increased; the above process is circularly carried out, and in the circulation process, the actual loading force is ensured to reach the set target pressure value through PID real-time tracking control;
4) And correcting the set target pressure value in real time by a control system according to the temperature, time or other parameters in the experimental process.
The upper part of the upright post lifting mechanism 10 is provided with a lifting arm 10-11, the lifting arm 10-11 can lift along the upright post 10-9, the top of the lifting arm 10-11 is provided with a rotating mechanism 11, and the rotating mechanism 11 can horizontally rotate in a certain angle range with a power loading and measuring mechanism 1. When the lifting arm 10-11 moves downwards under the drive of the torque motor 10-1 in the upright lifting mechanism 10, the loading load force applied by the force loading and measuring mechanism 1 acts on the sample 6 through the pressure disc 5 at the bottom of the loading rod 2, and the sample 6 bears the loading load on the bearing disc 7.
The pressure sensor 1-7 is arranged on the fixed support 1-5, a shield 1-1 is arranged outside the pressure sensor, one end of the bottom is fixedly connected with the fixed support 1-5 through a sensor fixing seat 1-6, and the other end is fixedly connected with the loading head 1-3 through a bolt 1-4; when the force loading and measuring mechanism 1 continues to move downwards, the reaction force F1 generated by the sample 6 on the loading rod 2 rotates relative to the rotating shaft 1-2 through the loading head 1-3 and then is applied to the installation center F2 of the pressure sensor 1-7, the force arm length L from the rotating shaft 1-2 to the center of the loading rod 2 is an integral multiple of the distance L1 from the rotating shaft 1-2 to the installation center of the pressure sensor 1-7, namely L=nL1, so that F1=nF2 exists, the force sensed by the pressure sensor 29 is n times of the actual loading force (the n value is generally taken as 2), and the data measured by the pressure sensor 1-7 are corrected by the control system, so that the actual loading force is obtained through conversion. The other end of the pressure sensor 1-7 is fixed on the fixed support 1-5 through the sensor fixing seat 1-6, and the whole force loading and measuring mechanism is fixed on the outer rotating arm 11-6 of the rotating mechanism 11 through the fixed support 1-5.
The torque motor 10-1 is fixed through the torque motor seat 10-2, an output shaft of the torque motor 10-1 is connected with the screw rod 10-8 through the coupler 10-3 and the connecting piece 10-4, the torque motor 10-1 drives the screw rod 10-8 to rotate, the screw rod 10-8 and the screw nut 10-7 are in matched transmission, the rotary motion is converted into linear motion under the action of the screw nut anti-rotation block 10-6, the lifting arm 10-11 is driven to lift along the vertical direction, and the lifting arm 10-11 is in sliding support with the upright post 10-9 through the sliding bearing.
The deflection motor 11-1 is fixed on the deflection motor seat 11-2, an output shaft of the deflection motor 11-1 is supported by the support bearing 11-3, the rotation operation is transmitted to the outer rotating arm 11-6 by the rotating connecting piece 11-5, the outer rotating arm 11-6 is fixedly supported with the lifting arm 10-11 through the rotating arm upper bearing 11-7 and the rotating arm lower bearing 11-8, and the outer rotating arm 11-6 is driven by the deflection motor 11-1 to horizontally rotate within a certain angle range, so that the force loading and measuring mechanism 1 can horizontally rotate and lift; when load loading is needed, the loading heads 1-3 are matched with the bearing table on the loading rod 2, the force loading and measuring mechanism 1 is rotated to the loading rod 2, and loading and unloading are performed in real time through lifting motion.
The control system can be a PLC or a singlechip, and can be used for further combining experimental parameters such as temperature, time and the like to further fix the loading pressure value.
In the invention, the torque motor is a power source of load loading force, and the best choice of the torque motor is a servo motor, because the servo motor does not have pulse vibration in the rotating process and is smoothly rotated. The stepper motor can achieve good use effect by controlling the resolution, otherwise, the stepper motor can generate step-like shaking of the adjusting force; in addition, a common direct current motor can be adopted to be additionally provided with a speed reducer, and the torque is improved through speed regulation so as to effectively drive a load.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The automatic load loading device for the metallurgical or coking material performance measurement experiment is arranged at one side of an experiment furnace, the experiment furnace consists of a furnace body, a hearth pipe and a loading rod, the lower part of the hearth pipe is provided with a bearing disc for bearing a sample, and the bottom of the loading rod extends into the hearth pipe and is connected with a pressure disc for applying pressure to the sample; the automatic load loading device is characterized by comprising a force loading and measuring mechanism, a stand column lifting mechanism and a rotating mechanism; the top of the upright post lifting mechanism is provided with a rotating mechanism and can drive the rotating mechanism to lift; the force loading and measuring mechanism consists of a fixed support, a pressure sensor, a loading head and a rotating shaft, wherein one end of the fixed support is fixedly connected with the rotating mechanism and can horizontally rotate within a set range under the driving of the rotating mechanism; the other end of the fixed support is provided with a horizontal rotating shaft, the middle part of the loading head is hinged with the rotating shaft and can rotate around the rotating shaft, one end of the loading head extends out of the fixed support, the extending end is connected with the loading rod, and the other end of the loading head extends above the fixed support; the pressure sensor is arranged on the fixed support, one end of the bottom of the pressure sensor is fixedly connected with the fixed support through the sensor fixing seat, and the other end of the bottom of the pressure sensor is fixedly connected with the corresponding end of the loading head; the distance L from the center of the loading rod to the center of the rotating shaft is larger than the distance L1 from the center of the rotating shaft to the fixed center of the pressure sensor and the loading head, L=nL1, and n is more than or equal to 2 and is a positive integer.
2. The automatic load loading device for metallurgy or coking material performance measurement experiments according to claim 1, wherein the upright lifting mechanism comprises an upright and a torque motor, a screw rod, a screw nut anti-rotation block and a lifting arm which are arranged in the upright; the torque motor is fixed at the bottom of the upright post through a torque motor seat, an output shaft of the torque motor is connected with the bottom end of the screw rod through a coupler and a connecting piece, and the bottom of the screw rod is supported and fixed in the upright post through a screw rod bearing; the upper part of the screw rod is connected with a screw nut in a matched manner, the screw nut is connected with a lifting arm through a screw nut anti-rotation block, the torque motor drives the screw rod to rotate and drives the lifting arm through the screw nut to realize lifting action, and a sliding bearing is arranged between the lifting arm and the upright post; the rotating mechanism is arranged on the lifting arm.
3. The automatic load loading device for metallurgy or coking material performance measurement experiments according to claim 2, wherein the rotating mechanism comprises a displacement motor, a displacement motor seat, an outer rotating arm, a support bearing and a support bearing seat; the displacement motor is fixed at the top of the displacement motor seat, the axis of the displacement motor seat coincides with the axis of the upright post, the bottom plate of the displacement motor seat is fixedly connected with the top of the lifting arm, the bottom plate of the displacement motor seat is provided with a support bearing seat, and the output shaft of the displacement motor is supported by a support bearing in the support bearing seat; the outer rotating arm is sleeved on the outer side of the upper part of the lifting arm, the top of the outer rotating arm is connected with the output shaft of the displacement motor through a rotating connecting piece, and the outer rotating arm can rotate around the axis of the displacement motor under the driving of the displacement motor; the outer rotating arm and the lifting arm are supported by the upper rotating arm upper bearing and the lower rotating arm lower bearing to realize relative rotation; and a fixed support in the force loading and measuring mechanism is fixedly connected with the outer rotating arm.
4. The automatic load loading device for metallurgy or coking material performance measurement experiments according to claim 2, wherein the torque motor is one of a servo motor, a stepping motor or a direct current motor.
5. The automatic load device for metallurgy or coking material performance measurement experiment according to claim 3, wherein the displacement motor is a stepper motor.
6. The automatic load device for metallurgy or coking material performance measurement experiment according to claim 1, wherein the pressure sensor is an S-type pressure sensor or a cantilever type pressure sensor.
7. The automatic load loading device for metallurgy or coking material performance measurement experiments according to claim 1, wherein the fixed support is composed of a horizontal seat plate and an inclined support, and the horizontal seat plate and the inclined support are respectively fixedly connected with an outer rotating arm in the rotating mechanism to form a triangular support structure.
8. The automatic load loading device for metallurgy or coking material property measurement experiments according to claim 2, further comprising a base, wherein the bottoms of the experiment furnace and the stand column are both fixed on the base, and wherein the stand column is fixed by a stand column fixing flange.
9. The automatic load device for metallurgical or coking material performance measurement experiment according to claim 1, wherein the top of the loading rod is provided with a bearing table, the corresponding position of the loading head is provided with an arc-shaped groove, the opening size of the arc-shaped groove is larger than the diameter of the loading rod, and the diameter of the arc-shaped groove is smaller than the diameter of the bearing table.
10. An automatic load loading method for metallurgy or coking material performance measurement experiments by adopting the device as claimed in claim 3, which is characterized in that the device is used for loading; the method specifically comprises the following steps:
1) When an experiment starts, adding a sample to a bearing disc of a hearth pipe, and installing a loading rod; then starting a torque motor, driving a rotating mechanism, a force loading and measuring mechanism to lift by a column lifting mechanism, and adjusting a loading head to the upper part of a loading rod; then starting a displacement motor to enable the loading head to rotate and then be connected with the loading rod in a matched manner;
2) Restarting the torque motor to enable the loading head to drive the loading rod to move downwards, and starting to apply pressure to the sample after the pressure disc contacts the sample; when the actual loading force is F, the reverse acting force F1 of the sample to the loading rod is F=F1, the reverse acting force F1 is transmitted to the loading head through the loading rod, one end of the loading head rotates around the rotating shaft after receiving the upward force F1, and the other end of the loading head applies the downward force F2 to the pressure sensor, wherein F2 = L/L1.F = nF;
3) The signal output end of the pressure sensor is connected with a control system, and the control system corrects and calculates the measured pressure value F2 to obtain the actual loading force F; a PID control algorithm is programmed in the control system, a target pressure value is set, and when the pressure value born by the sample is larger than the set target pressure value, the torque motor drives the loading head to move upwards, so that the loading force on the sample is reduced; when the sample contracts and the pressure value born by the sample is smaller than the set target pressure value, the torque motor drives the loading head to move downwards, so that the loading force on the sample is increased; the above process is circularly carried out, and in the circulation process, the actual loading force is ensured to reach the set target pressure value through PID real-time tracking control;
4) And correcting the set target pressure value in real time by a control system according to the temperature, time or other parameters in the experimental process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810817487.0A CN108693038B (en) | 2018-07-24 | 2018-07-24 | Automatic load loading device and method for metallurgical or coked material performance measurement experiment |
Applications Claiming Priority (1)
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| CN109991125B (en) * | 2019-05-16 | 2022-09-23 | 重庆大学 | Method and equipment for testing variable-pressure type reflow dripping performance |
| CN115372150B (en) * | 2022-10-24 | 2023-01-31 | 中国中医科学院望京医院(中国中医科学院骨伤科研究所) | Bidirectional loading device, method and loading system for spine |
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