CN-121978364-A - Muffle furnace automatic sample inlet and outlet device and method for bituminous coal caking index determination

CN121978364ACN 121978364 ACN121978364 ACN 121978364ACN-121978364-A

Abstract

The invention discloses a muffle furnace automatic sample inlet and outlet device and method for bituminous coal caking index determination, which relate to the technical field of muffle furnaces and specifically comprise a bearing substrate, a control module, a muffle furnace, a transfer unit, a temporary storage unit, a sample inlet and outlet execution unit and a cooling unit, wherein the muffle furnace can be switched to a constant power mode to stabilize temperature when a furnace door is opened, the operation is required to be initialized to be heated to 850 ℃ plus or minus 5 ℃ and kept at the temperature, the transfer unit sends samples to the execution unit, the execution unit accurately sends samples into the furnace for carbonization, automatic sampling is carried out after carbonization, natural air cooling is carried out, forced cooling and cyclic operation are carried out, and the like.

Inventors

XIANG ENGUANG

Assignees

鞍山星源达科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (8)

1. The muffle furnace automatic sample inlet and outlet device for the bituminous coal caking index measurement comprises a bearing substrate, a control module, a muffle furnace, a transfer unit, a temporary storage unit, a crucible sample group, a sample inlet and outlet execution unit and a cooling unit, wherein the muffle furnace is provided with a muffle furnace door, the temporary storage unit is used for storing the crucible sample group, the sample inlet and outlet execution unit is used for driving the crucible sample group to enter and exit the muffle furnace, the transfer unit is used for transferring the crucible sample group among the temporary storage unit, the sample inlet and outlet execution unit and the cooling unit, the control module is electrically connected with the above units, and the control module controls the muffle furnace to switch to a constant power output mode when a furnace body opening is opened.
2. The automatic sample feeding and discharging device for the muffle furnace for determining the caking index of the bituminous coal according to claim 1, wherein the bearing substrate is a workbench, the transfer unit is a robot unit, the robot unit is fixed on the bearing substrate, the output end of the robot unit is provided with an operating member for grabbing the crucible group samples, and the temporary storage unit is a buffer zone and is used for feeding back the temporary storage state of the crucible group samples.
3. The automatic sample feeding and discharging device for the muffle furnace for determining the caking index of the bituminous coal according to claim 2, wherein the sample feeding and discharging execution unit is a sample loading unit and comprises a lifting mechanism, a horizontal movement mechanism and a sample loading unit workbench, a three-dimensional transfer motion is formed between the lifting mechanism and the horizontal movement mechanism, and a positioning structure matched with a crucible group sample is arranged on the sample loading unit workbench.
4. The automatic sample feeding and discharging device of the muffle furnace for determining the caking index of the bituminous coal according to claim 3, wherein the lifting mechanism comprises a lifting servo motor, a fixing piece, a bearing seat, a coupler, a speed reducer, a ball screw, an aluminum alloy frame and a supporting frame, the lifting servo motor drives the ball screw to rotate through the speed reducer, the ball screw is fixedly connected with the supporting frame, the top of the supporting frame is connected with a sample carrying frame seat and drives the sample carrying frame seat to vertically lift, the horizontal movement mechanism comprises a linear servo motor and a linear module, the sample carrying frame seat is fixed on a sliding block of the linear module and forms horizontal reciprocating movement, the sample carrying unit workbench comprises a bearing rod fixedly connected to the sample carrying frame seat, a high Wen Gan connected to the front end of the bearing rod and a positioning clamp arranged at the tail end of the high Wen Gan, and the positioning clamp is used for fixing a crucible set sample.
5. The automatic sample feeding and discharging device for the muffle furnace for determining the caking index of the bituminous coal according to claim 4, wherein the cooling unit comprises a cooling base, a heat radiation member, a positioner and a detection switch, the positioner is used for being matched with the positioning action of the crucible set sample, and the detection switch and the heat radiation member form a linkage relation and start the heat radiation member after detecting that the sample is in place.
6. The automatic sample feeding and discharging device for the muffle furnace for determining the caking index of the bituminous coal according to claim 5, wherein an upper limit sensor and a lower limit sensor are arranged in the lifting mechanism, and the upper limit sensor and the lower limit sensor are respectively arranged at an upper limit position and a lower limit position of a lifting stroke and are used for triggering a stop signal of lifting movement.
7. The automatic sample inlet and outlet device for the muffle furnace for determining the caking index of the bituminous coal according to claim 6, wherein an elastic buffer layer is arranged on the inner side of the positioning card, the control module comprises a PLC (programmable logic controller), a man-machine interaction module and an alarm module, a timing module and a motion control module are arranged in the PLC, the alarm module gives out audible and visual alarm when overtemperature, overtravel or sample lack, a pneumatic or electric driving mechanism is arranged in a muffle furnace door and is electrically connected with the control module, and a cooling part of the cooling unit is a cooling fan.
8. A muffle furnace automatic sample inlet and outlet method for determining the caking index of bituminous coal, which is applied to the muffle furnace automatic sample inlet and outlet device for determining the caking index of bituminous coal according to claim 7, and is characterized by comprising the following actions: The initialization preparation stage comprises the steps of starting a control module, resetting a sample inlet and outlet execution unit, heating a muffle furnace to 850 ℃ plus or minus 5 ℃ and preserving heat for more than or equal to 30 minutes, transferring a crucible group sample to a temporary storage unit and feeding back a signal; The automatic sample feeding stage comprises the steps that a transfer unit grabs a crucible set sample of a temporary storage unit, the crucible set sample is placed in a positioning structure of a sample feeding and discharging execution unit, a control module sends a sample feeding instruction, and the sample feeding and discharging execution unit drives a sample to rise to the level with an opening of a furnace body through the sample feeding instruction; The muffle furnace is switched to a constant power mode, the furnace body opening is opened, the sample inlet and outlet execution unit drives the sample to be horizontally fed into the dry distillation position of the muffle furnace and then to be lowered and placed, and then the sample is unloaded and withdrawn; The horizontal movement mechanism drives the sample carrying frame seat to exit the muffle furnace in an idle load mode, the furnace door is automatically closed, the muffle furnace is restored to a temperature control mode, and the carbonization timing module starts timing; The automatic sampling stage comprises the steps of finishing carbonization timing, switching the muffle furnace to a constant power mode, opening a furnace body, feeding the sample in and out execution unit into the muffle furnace in an idle load manner, and lifting and picking up the sample after the positioning structure is aligned to the sample; The lifting mechanism drives the sample carrying frame seat to lift, the positioning clamp feeds back a clamping signal after fixing the crucible set sample, the horizontal movement mechanism drives the sample carrying frame seat to carry the crucible set sample to withdraw from the muffle furnace, the furnace door is automatically closed, and the muffle furnace is restored to a temperature control mode; a cooling transfer stage, in which the sample inlet and outlet execution unit drives the sample to descend to a waiting position, natural air cooling is carried out for 3-5min, the transfer unit transfers the sample to a positioner of the cooling unit, the detection switch triggers the starting of the heat dissipation piece, and forced air cooling is carried out for 10-15min; And in the cyclic operation stage, after cooling is finished, the transfer unit sends the sample to the next process, and the control module judges whether the temporary storage unit has unprocessed samples, if so, the automatic sample sending stage is returned, and otherwise, the automatic sample sending stage is standby.

Description

Muffle furnace automatic sample inlet and outlet device and method for bituminous coal caking index determination Technical Field The invention relates to the technical field of muffle furnaces, in particular to an automatic sample feeding and discharging device and method for a muffle furnace for measuring a bituminous coal caking index. Background The bituminous coal caking index (G value) is a core index for evaluating the caking capacity of bituminous coal, the measurement needs to strictly follow the national standard (such as GB/T5447), the prepared coal sample and the special anthracite coal are mixed and then are put into a crucible, and the crucible is placed in a muffle furnace to finish the carbonization reaction in a high-temperature environment at 850 ℃. The muffle furnace sample inlet and outlet links of the traditional bituminous coal G value measurement rely on manual operation, operators need to complete transferring, throwing and taking out of crucible group samples at a high-temperature furnace mouth, labor intensity is high, potential safety hazards of high-temperature scalding exist, meanwhile, manual operation is difficult to accurately control sample feeding and sampling time nodes, accuracy and repeatability of G value measurement data can be directly influenced by small deviation of carbonization time length, in addition, the efficiency of an operation mode of a manual single batch is low, large-scale and batch coal quality detection requirements of a laboratory cannot be adapted, and intelligent upgrading process of a coal quality analysis laboratory is restricted. At present, although partial automation equipment (such as a publication number CN218723044U, CN 210832995U) exists, a mature scheme which can be in seamless joint with a high-temperature muffle furnace to realize continuous, accurate and full-automatic sample feeding and discharging of a bituminous coal G value sample is lacking, and key technical problems such as sample transfer, stable maintenance of the temperature in the furnace and the like in a high-temperature environment are difficult to solve, so that the invention provides a solution. Disclosure of Invention The invention aims to provide a muffle furnace automatic sample inlet and outlet device and method for bituminous coal caking index determination, which realize the whole-course automation of a high-temperature sample inlet and outlet link of G value determination, ensure the accuracy of detection data, and improve the operation safety and detection efficiency. The automatic muffle furnace sample inlet and outlet device for the bituminous coal caking index determination comprises a bearing substrate, a control module, an adaptive muffle furnace, a transfer unit, a temporary storage unit, a crucible sample inlet and outlet execution unit and a cooling unit, wherein the muffle furnace is provided with a muffle furnace door, the temporary storage unit is used for storing the crucible sample, the sample inlet and outlet execution unit is used for driving the crucible sample to enter and exit the muffle furnace, the transfer unit is used for transferring the crucible sample between the temporary storage unit, the sample inlet and outlet execution unit and the cooling unit, the control module is electrically connected with the above units, and the control module controls the muffle furnace to be switched to a constant power output mode when an opening of a furnace body is opened. The automatic muffle furnace sample inlet and outlet device for the bituminous coal caking index measurement comprises a bearing substrate, a control module, an adaptive muffle furnace, a transfer unit, a temporary storage unit, a crucible sample group, a sample inlet and outlet execution unit and a cooling unit, wherein the muffle furnace is provided with a muffle furnace door, the temporary storage unit is used for storing the crucible sample group, the sample inlet and outlet execution unit is used for driving the crucible sample group to enter and exit the muffle furnace, the transfer unit is used for transferring the crucible sample group among the temporary storage unit, the sample inlet and outlet execution unit and the cooling unit, the control module is electrically connected with the above units, and the control module controls the muffle furnace to switch to a constant power output mode when an opening of a furnace body is opened. The sample feeding and discharging execution unit is a sample loading device unit and comprises a lifting mechanism, a horizontal movement mechanism and a sample loading unit workbench, wherein a three-dimensional transfer motion is formed between the lifting mechanism and the horizontal movement mechanism, and a positioning structure matched with a crucible set sample is arranged on the sample loading unit workbench. The lifting mechanism comprises a lifting servo motor, a fixing piece, a bearing seat, a coupler, a speed reducer, a ball screw, an a