Device for measuring moisture content of ore powder and control method thereof

Abstract

The present invention discloses a device for measuring the moisture content of ore powder and a control method thereof, which relates to the technical field of moisture meters. The invention aims to solve the problem that in the use of existing devices, when the hot gas generated by evaporation contacts the upper cold wall surface or cold air, it will re-condense and flow back into the device, resulting in prolonged heating time and affecting measurement efficiency. A top plate is arranged above the sealing ring, and the four corners of the top plate are fixedly connected to the bottom plate through pillars; an electric push rod is installed at the middle position of the upper end of the top plate, and the output end of the electric push rod passes through and extends to the lower end of the top plate; a moisture collection mechanism is installed on the output end of the electric push rod; a positioning groove is arranged at the connection between the transmission chamber and the main body of the measuring device, and the positioning groove and the main body of the measuring device are integrally formed, and the surface of the positioning groove is provided with a conductive sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of moisture meters, in particular to a device for measuring the moisture content of ore powder and a control method thereof. Background Art

[0002] When transporting refined ore powder on ships, it is usually necessary to measure the moisture content of the refined ore powder to ensure transportation safety. A moisture meter is a device that can measure the moisture content of ore powder.

[0003] For example, the application number CN110470567A is a moisture meter, which includes a heating isolation cylinder, a bottom upper shell and a bottom lower shell; the heating isolation cylinder is provided with a heating tube, and a tray is provided in the middle of the bottom, and the tray is located below the heating tube; the bottom upper shell is provided with a touch display screen; the bottom lower shell is provided with a heating control system, a core computing system, a weighing sensor, a filter power supply and a power supply filtering system in sequence and electrically connected to each other, the heating control system is connected to the heating tube of the heating isolation cylinder, and the weighing sensor is arranged adjacent to the tray; the core computing system is electrically connected to the touch display screen.

[0004] During the use of the above-mentioned device, the hot gas generated by evaporation will re-condense and flow back into the device when it contacts the upper cold wall surface or cold air, resulting in prolonged heating time and affecting measurement efficiency; therefore, we propose a device for measuring the moisture content of ore powder and its control method to solve the above-mentioned problems. Summary of the Invention

[0005] The object of the present invention is to provide a device for measuring the moisture content of ore powder and a control method thereof, so as to solve the problem that in the use of the existing device proposed in the above background technology, the hot gas generated by evaporation will re-condense and flow back into the device when it contacts the upper cold wall surface or cold air, resulting in prolonged heating time and affecting measurement efficiency.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for measuring the moisture content of ore powder, comprising a measuring device body, a bottom plate mounted on the lower surface of the measuring device body, shock-absorbing and anti-slip pads mounted on the four corners of the lower surface of the bottom plate, a display screen mounted on the front end surface of the measuring device body, a transmission chamber mounted above the measuring device body, a heating chamber disposed above the transmission chamber, an electric heating coil mounted inside the heating chamber, a heating cylinder disposed above the heating chamber, a sealing ring disposed on the upper end surface of the heating cylinder, and a heating cavity disposed inside the heating cylinder;

[0007] Also includes:

[0008] A top plate, which is arranged above the sealing ring, and the four corners of the top plate are fixedly connected to the bottom plate through pillars;

[0009] An electric push rod is installed at a middle position of the upper end of the top plate, and an output end of the electric push rod passes through and extends to the lower end of the top plate;

[0010] A moisture collection mechanism, which is installed on the output end of the electric push rod;

[0011] A positioning groove is provided at the connection between the transmission chamber and the measuring device body, and the positioning groove and the measuring device body are integrally formed, and a conductive sheet is provided on the surface of the positioning groove.

[0012] Preferably, the interior of the measuring device body is equipped with an embedded single-chip microcomputer, a power supply module, a weighing sensor, an alarm module, a timing module, a first motor drive module and an electric heating control module 1. The input end of the embedded single-chip microcomputer is electrically connected to the output end of the weighing sensor, the timing module and the power supply module. The output end of the embedded single-chip microcomputer is electrically connected to the output end of the alarm module, the display screen, the first motor drive module, the electric heating control module 1 and the conductive sheet. The output end of the first motor drive module is electrically connected to the input end of the electric push rod.

[0013] Preferably, a power circuit board is installed on the bottom surface of the transmission chamber, and the output end of the conductive sheet is electrically connected to the input end of the power circuit board, and the second motor drive module and the electric heating control module 2 are installed on the power circuit board.

[0014] Preferably, electromagnets are provided on both sides of the conductive sheet, and the electromagnets are embedded in the positioning grooves, and the input end of the embedded single-chip microcomputer is electrically connected to the input end of the electromagnets.

[0015] Preferably, the moisture collection mechanism includes a through-hole active silicone disk, a metal ring and an electric heating ring, the metal ring is arranged on the outer wall of the through-hole active silicone disk, a flexible rubber layer is provided on the outer wall of the metal ring, and the flexible rubber layer is bonded to the metal ring, the electric heating ring is installed below the through-hole active silicone disk, and the input end of the electric heating ring is electrically connected to the output end of the electric heating control module.

[0016] Preferably, guide columns are installed on both sides above the moisture collection mechanism, and one end of the guide column passes through and extends to the upper end of the top plate. A linear bearing is installed at the connection between the top plate and the guide column, and a limit block is installed at one end of the guide column.

[0017] Preferably, a laser ranging sensor is installed at a middle position inside the through-hole active silicone disk, and the output end of the laser ranging sensor is electrically connected to the input end of the embedded single-chip microcomputer.

[0018] Preferably, an asynchronous motor is installed at the upper end of one side of the transmission chamber, the output end of the asynchronous motor passes through and extends to the interior of the transmission chamber, and is installed with a first pulley, a rotating shaft is installed inside the first pulley, the lower end of the rotating shaft is rotatably connected to the inner wall of the transmission chamber through a bearing, a second pulley is provided inside the transmission chamber, the second pulley is connected to the first pulley through a belt, a stirring shaft is installed at the upper end of the second pulley, and one end of the stirring shaft passes through the heating chamber and extends to the interior of the heating cylinder, and heat-conducting stirring blades are installed on both sides of the stirring shaft.

[0019] Preferably, an electric heating wire is installed inside the stirring shaft, and the heating cylinder includes an insulating outer cylinder and an insulating inner cylinder. The insulating outer cylinder is arranged outside the insulating inner cylinder, and a partition is provided between the insulating outer cylinder and the insulating inner cylinder. There are four partitions, and electric heating nets are installed inside the four partitions. Partitions are installed between adjacent partitions. The output end of the electric heating control module 2 is electrically connected to the input end of the electric heating wire, the electric heating net and the electric heating coil.

[0020] Preferably, the control method of the device for measuring the moisture content of ore powder comprises the following steps:

[0021] Step 1: Remove the heating tube from the measuring device body, pour in the ore powder to be tested, and then re-place the heating tube into the positioning groove of the measuring device body. After it is placed in, the conductive sheet in the positioning groove is connected to the power circuit board under the transmission chamber at the bottom of the heating tube to realize the power supply of the entire device;

[0022] Step 2: During the detection, the weighing sensor first weighs the weight of the material in the current container, and then feeds the data back to the embedded single-chip microcomputer. After receiving the data, the embedded single-chip microcomputer sends signals to the electromagnet and the laser distance sensor respectively. The electromagnet adsorbs and fixes the transmission chamber at the bottom of the heating cylinder, while the laser distance sensor in the center of the through-hole active silicone disc can detect the distance between the through-hole active silicone disc and the material, and feeds the information back to the embedded single-chip microcomputer;

[0023] Step 3: After the embedded single-chip microcomputer receives the signal sent by the laser ranging sensor, it transmits data with the power circuit board to drive the first motor drive module, the second motor drive module, the electric heating control module 1 and the electric heating control module 2 to operate. Among them, the first motor drive module drives the electric push rod to operate according to the ranging information just received, so that the moisture collection mechanism moves down to the position above the material, while the electric heating control module 1 and the electric heating control module 2 drive the electric heating ring, the electric heating coil, the electric heating wire and the electric heating network to operate. The electric heating network is evenly spaced in the insulation layer of the heating cylinder. The number of open groups is determined according to the material height determined by the ranging information to reduce energy consumption. While the electric heating ring, the electric heating coil and the electric heating network are heating the material in a covering manner, the second motor drive module drives the asynchronous motor to operate, and the belt drive mechanism is used to drive the stirring shaft to rotate. The heat-conducting stirring blades make the material float up and down, making the heating process more thorough. The moisture inside the heated gas is quickly absorbed by the through-hole active silica gel disk in the moisture collection mechanism on the upper layer of the material to avoid condensation in contact with cold air, and the dry gas continues to be discharged upward along the through-hole;

[0024] Step 4: After heating for three minutes, the timing module sends a signal to the embedded single-chip microcomputer to drive the weighing sensor to weigh again. If there is no obvious change in the weighing information this time, it means that there is a fault in the device heating system. At this time, the embedded single-chip microcomputer will send a signal to the alarm module to remind personnel to inspect. If the weighing sensor changes, the weight is recorded and the weighing measurement is maintained. After the weight no longer changes, the electric push rod contracts and drives the moisture collection mechanism to withdraw from the heating cylinder. After withdrawal, the electromagnet stops adsorption. The weighing sensor measures again and transmits the data to the embedded single-chip microcomputer. The embedded single-chip microcomputer calculates the change in material weight and finally displays the calculated moisture content on the display.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention provides a moisture collection mechanism driven by an electric push rod at the top of the device, and a laser distance sensor is installed in the moisture collection mechanism. Before heating, the laser distance sensor can measure the distance between the through-hole active silica gel disk and the material, thereby controlling the downward movement distance of the electric push rod, so that the moisture collection mechanism can be located just above the material, reducing the heating space inside the heating cylinder and improving the subsequent heating efficiency. During heating, the through-hole active silica gel disk inside the moisture collection mechanism can efficiently absorb moisture in the gas, preventing it from re-condensing into dew when it is cooled and flowing back into the device, affecting the measurement efficiency. The dry gas can be discharged along the through-hole without causing the internal pressure of the device to increase. The outermost flexible rubber layer makes the connection between the moisture collection mechanism and the inner wall of the heating cylinder tighter, preventing water vapor from escaping from the edge, and at the same time improving the heating efficiency of the electric heating ring below the through-hole active silica gel disk. This solves the problem that in the existing device, the hot gas generated by evaporation will re-condense and flow back into the device when it contacts the upper cold wall surface or cold air during use, resulting in prolonged heating time and affecting measurement efficiency.

[0027] 2. By setting four compartments equidistantly from bottom to top in the heating cylinder, each compartment is equipped with an independently openable electric heating network. Depending on the measurement height of the laser sensor, the appropriate number of electric heating networks can be selected to start, ensuring heating efficiency while reducing energy consumption. Combined with the electric heating coil at the bottom of the device, the electric heating ring under the top moisture collection mechanism, and the electric heating wire in the stirring shaft, the device can be fully heated from the inside to the outside, significantly improving the efficiency of water evaporation. At the same time, while the moisture collection mechanism is absorbing moisture, the electric heating ring can simultaneously heat it, so that the water vapor absorbed inside it continues to evaporate and discharge upward to avoid saturation, allowing the moisture meter to be used continuously and uninterruptedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the heating tube of the present invention;

[0030] Figure 3 This is a schematic diagram of the main structure of the measuring device of the present invention;

[0031] Figure 4 Schematic diagram of the structure of the moisture collection mechanism of the present invention;

[0032] Figure 5 It is a schematic diagram of the local structure of the electric heating network of the present invention;

[0033] Figure 6 It is the system principle diagram of the present invention;

[0034] In the figure: 1. bottom plate; 2. measuring device body; 3. display screen; 4. transmission chamber; 5. asynchronous motor; 6. heating chamber; 7. heating cylinder; 701. heat-insulating outer cylinder; 702. heat-insulating inner cylinder; 8. sealing ring; 9. heating chamber; 10. support; 11. top plate; 12. moisture collection mechanism; 121. flexible rubber layer; 122. metal ring; 123. through-hole active silicone disc; 124. electric heating ring; 13. guide column; 14. linear bearing; 15. limit block; 16. electric push rod; 17. partition; 18. electric heating grid; 19. partition; 20. first pulley; 21 , rotating shaft; 22. bearing; 23. second pulley; 24. belt; 25. power circuit board; 26. stirring shaft; 27. heat-conducting stirring blade; 28. electric heating coil; 29. ​​positioning groove; 30. conductive sheet; 31. electromagnet; 32. weighing sensor; 33. alarm module; 34. timing module; 35. first motor drive module; 36. electric heating control module one; 37. second motor drive module; 38. electric heating control module two; 39. electric heating wire; 40. laser ranging sensor; 41. shock-absorbing and anti-slip pad; 42. power module; 43. embedded single-chip microcomputer. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figure 1-6 The present invention provides an embodiment of a device for measuring the moisture content of ore powder, comprising a measuring device body 2, a bottom plate 1 being mounted on the lower surface of the measuring device body 2, shock-absorbing and anti-slip pads 41 being mounted at the four corners of the lower surface of the bottom plate 1, a display screen 3 being mounted on the front surface of the measuring device body 2, a transmission chamber 4 being mounted above the measuring device body 2, a heating chamber 6 being disposed above the transmission chamber 4, an electric heating coil 28 being mounted inside the heating chamber 6, a heating tube 7 being disposed above the heating chamber 6, a sealing ring 8 being disposed on the upper end surface of the heating tube 7, and a heating cavity 9 being disposed inside the heating tube 7;

[0037] Also includes:

[0038] A top plate 11 is provided above the sealing ring 8, and the four corners of the top plate 11 are fixedly connected to the bottom plate 1 via pillars 10;

[0039] An electric push rod 16 is installed at a middle position of the upper end of the top plate 11, and an output end of the electric push rod 16 passes through and extends to the lower end of the top plate 11;

[0040] A moisture collecting mechanism 12 is mounted on the output end of the electric push rod 16;

[0041] The positioning groove 29 is provided at the connection between the transmission chamber 4 and the measuring device body 2 , and the positioning groove 29 and the measuring device body 2 are integrally formed. A conductive sheet 30 is provided on the surface of the positioning groove 29 .

[0042] See also Figure 6 The measuring device body 2 is internally installed with an embedded single-chip microcomputer 43, a power module 42, a weighing sensor 32, an alarm module 33, a timing module 34, a first motor drive module 35 and an electric heating control module 36. The input end of the embedded single-chip microcomputer 43 is electrically connected to the output end of the weighing sensor 32, the timing module 34 and the power module 42. The output end of the embedded single-chip microcomputer 43 is electrically connected to the output end of the alarm module 33, the display screen 3, the first motor drive module 35, the electric heating control module 36 and the conductive sheet 30. The output end of the first motor drive module 35 is electrically connected to the input end of the electric push rod 16. Through the timing function of the timing module 34, the weighing sensor 32 can be controlled to measure the material weight at a fixed time. If there is no obvious change in the weight, it indicates that there is a fault in the heating system. At this time, after receiving the data feedback, the embedded single-chip microcomputer 43 will drive the alarm module 33 to run, reminding personnel to repair. The display screen 3 is used to display the calculated moisture content result.

[0043] See also Figure 6 A power circuit board 25 is installed on the bottom surface of the transmission chamber 4, and the output end of the conductive sheet 30 is electrically connected to the input end of the power circuit board 25. A second motor drive module 37 and a second electric heating control module 38 are installed on the power circuit board 25. The power circuit board 25 can cooperate with the embedded single-chip microcomputer 43 to send signals to the second motor drive module 37 and the second electric heating control module 38 to drive the stirring and heating system to operate.

[0044] See also Figure 3 and Figure 6 Electromagnets 31 are provided on both sides of the conductive sheet 30, and the electromagnets 31 are embedded in the positioning groove 29. The input end of the embedded single-chip microcomputer 43 is electrically connected to the input end of the electromagnet 31. The setting of the electromagnet 31 ensures the stability of the device during operation.

[0045] See also Figure 4The moisture collection mechanism 12 includes a through-hole active silicone disk 123, a metal ring 122 and an electric heating ring 124. The metal ring 122 is arranged on the outer wall of the through-hole active silicone disk 123. A flexible rubber layer 121 is arranged on the outer wall of the metal ring 122, and the flexible rubber layer 121 is bonded to the metal ring 122. The electric heating ring 124 is installed below the through-hole active silicone disk 123, and the input end of the electric heating ring 124 is electrically connected to the output end of the electric heating control module 36. The moisture collection mechanism 12 The internal through-hole active silica gel disk 123 can efficiently absorb moisture in the gas, preventing it from condensing into dew when it is cooled and flowing back into the device, affecting the measurement efficiency. The external metal ring 122 can ensure the strength of the through-hole active silica gel disk 123 and prevent it from deformation. The flexible rubber layer 121 outside the metal ring 122 makes the connection between the moisture collection mechanism 12 and the inner wall of the heating tube 7 tighter, preventing water vapor from escaping from the edge, and at the same time improving the heating efficiency of the electric heating ring 124 below the through-hole active silica gel disk 123.

[0046] See also Figure 1 Guide columns 13 are installed on both sides above the moisture collection mechanism 12, and one end of the guide column 13 passes through and extends to the upper end of the top plate 11. A linear bearing 14 is installed at the connection between the top plate 11 and the guide column 13, and a limit block 15 is installed at one end of the guide column 13. The guide column 13 can guide the moisture collection mechanism 12 to rise and fall, thereby improving stability.

[0047] See also Figure 4 and Figure 6 A laser ranging sensor 40 is installed in the middle position inside the through-hole active silicone disk 123. The output end of the laser ranging sensor 40 is electrically connected to the input end of the embedded single-chip microcomputer 43. On the one hand, the laser ranging sensor 40 can measure the distance between the through-hole active silicone disk 123 and the material, thereby controlling the downward movement distance of the electric push rod 16, so that the moisture collection mechanism 12 can be located just above the material, reducing the heating space inside the heating tube 7 and improving the heating efficiency. On the other hand, the distance measured by the laser ranging sensor 40 can further determine the height of the material in the heating tube 7, and four compartments 17 are equidistantly arranged from bottom to top in the heating tube 7. The electric heating network 18 in each compartment 17 can be opened independently, so that the appropriate number of electric heating networks 18 can be selected according to the height of the material to start, ensuring heating efficiency while reducing energy consumption.

[0048] See also Figure 2An asynchronous motor 5 is installed at the upper end of one side of the transmission chamber 4. The output end of the asynchronous motor 5 passes through and extends to the interior of the transmission chamber 4, and is installed with a first pulley 20. A rotating shaft 21 is installed inside the first pulley 20. The lower end of the rotating shaft 21 is rotatably connected to the inner wall of the transmission chamber 4 through a bearing 22. A second pulley 23 is provided inside the transmission chamber 4. The second pulley 23 is transmission-connected to the first pulley 20 through a belt 24. A stirring shaft 26 is installed on the upper end of the second pulley 23, and one end of the stirring shaft 26 passes through the heating chamber 6 and extends to the interior of the heating cylinder 7. Heat-conducting stirring blades 27 are installed on both sides of the stirring shaft 26. The output end of the asynchronous motor 5 can drive the stirring shaft 26 to rotate through the belt 24 transmission mechanism. The heat-conducting stirring blades 27 on both sides of the stirring shaft 26 make the material float up and down, thereby improving the heating effect and avoiding material agglomeration.

[0049] See also Figure 2 and Figure 6 An electric heating wire 39 is installed inside the stirring shaft 26, and the heating cylinder 7 includes an insulating outer cylinder 701 and an insulating inner cylinder 702. The insulating outer cylinder 701 is arranged on the outside of the insulating inner cylinder 702, and a partition 17 is provided between the insulating outer cylinder 701 and the insulating inner cylinder 702. There are four partitions 17, and electric heating nets 18 are installed inside the four partitions 17. Partitions 19 are installed between adjacent partitions 17. The output end of the electric heating control module 2 38 is electrically connected to the input end of the electric heating wire 39, the electric heating net 18 and the electric heating coil 28. The electric heating wire 39 and the electric heating net 18 heat the material from the inside and the outside respectively, which significantly improves the heating efficiency.

[0050] See also Figure 1-6 A method for controlling a device for measuring the moisture content of ore powder comprises the following steps:

[0051] Step 1: Remove the heating tube 7 from the measuring device body 2, pour the ore powder to be tested, and then re-place the heating tube 7 in the positioning groove 29 of the measuring device body 2. After placement, the conductive sheet 30 in the positioning groove 29 is connected to the power supply circuit board 25 below the transmission chamber 4 at the bottom of the heating tube 7, realizing power supply for the entire device;

[0052] Step 2: During the detection, the weighing sensor 32 first weighs the weight of the material in the current container. After completion, the data is fed back to the embedded single-chip microcomputer 43. After receiving the data, the embedded single-chip microcomputer 43 sends signals to the electromagnet 31 and the laser distance sensor 40 respectively. The electromagnet 31 adsorbs and fixes the transmission chamber 4 at the bottom of the heating cylinder 7, while the laser distance sensor 40 at the center of the through-hole active silicone disk 123 can detect the distance between the through-hole active silicone disk 123 and the material, and feeds the information back to the embedded single-chip microcomputer 43;

[0053] Step 3: After the embedded single chip microcomputer 43 receives the signal sent by the laser ranging sensor 40, it transmits data with the power circuit board 25 to drive the first motor driving module 35, the second motor driving module 37, the electric heating control module 1 36 and the electric heating control module 2 38 to operate. Among them, the first motor driving module 35 drives the electric push rod 16 to operate according to the ranging information just received, so that the moisture collection mechanism 12 moves down to the position above the material, and the electric heating control module 1 36 and the electric heating control module 2 38 drive the electric heating ring 124, the electric heating coil 28, the electric heating wire 39 and the electric heating network 18 to operate. Four groups of nets 18 are equidistantly arranged in the interlayer of the heating cylinder 7. The number of nets 18 opened is determined according to the material height determined by the distance measurement information to reduce energy consumption. While the electric heating ring 124, the electric heating coil 28 and the electric heating net 18 are heating the material in a covering manner, the second motor drive module 37 drives the asynchronous motor 5 to operate, and the belt 24 transmission mechanism is used to drive the stirring shaft 26 to rotate. The heat-conducting stirring blades 27 make the material float up and down, making the heating process more thorough. The moisture inside the heated gas is quickly absorbed by the through-hole active silica gel disk 123 in the moisture collection mechanism 12 on the upper layer of the material to avoid condensation in contact with cold air, while the dry gas continues to be discharged upward along the through-hole;

[0054] Step 4: After heating for three minutes, the timing module 34 sends a signal to the embedded single-chip microcomputer 43 to drive the weighing sensor 32 to weigh again. If there is no obvious change in the weighing information this time, it means that there is a fault in the heating system of the device. At this time, the embedded single-chip microcomputer 43 will send a signal to the alarm module 33 to remind personnel to inspect. If the weighing sensor 32 changes, the weight is recorded and the weighing measurement is maintained. After the weight no longer changes, the electric push rod 16 contracts and drives the moisture collection mechanism 12 to withdraw from the heating tube 7. After withdrawal, the electromagnet 31 stops adsorption, and the weighing sensor 32 measures again and transmits the data to the embedded single-chip microcomputer 43. The embedded single-chip microcomputer 43 calculates the change in material weight and finally displays the calculated moisture content result on the display screen 3.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A device for measuring the moisture content of ore powder, comprising a measuring device body (2), a bottom plate (1) being installed on the lower surface of the measuring device body (2), shock-absorbing and anti-slip pads (41) being installed at the four corners of the lower surface of the bottom plate (1), a display screen (3) being installed on the front end surface of the measuring device body (2), a transmission chamber (4) being installed above the measuring device body (2), a heating chamber (6) being provided above the transmission chamber (4), an electric heating coil (28) being installed inside the heating chamber (6), a heating tube (7) being provided above the heating chamber (6), a sealing ring (8) being provided on the upper end surface of the heating tube (7), and a heating cavity (9) being provided inside the heating tube (7); Its characteristics are: Also includes: A top plate (11) is arranged above the sealing ring (8), and the four corners of the top plate (11) are fixedly connected to the bottom plate (1) via pillars (10); An electric push rod (16) is installed at a middle position of the upper end of the top plate (11), and an output end of the electric push rod (16) passes through and extends to the lower end of the top plate (11); A moisture collection mechanism (12) mounted on the output end of the electric push rod (16); a positioning groove (29) provided at the connection between the transmission chamber (4) and the measuring device body (2), wherein the positioning groove (29) and the measuring device body (2) are integrally formed, and a conductive sheet (30) is provided on the surface of the positioning groove (29); The moisture collecting mechanism (12) comprises a through-hole active silica gel disc (123), a metal ring (122) and an electric heating ring (124); the metal ring (122) is arranged on the outer wall of the through-hole active silica gel disc (123); a flexible rubber layer (121) is arranged on the outer wall of the metal ring (122), and the flexible rubber layer (121) is bonded to the metal ring (122); the electric heating ring (124) is installed below the through-hole active silica gel disc (123), and the input end of the electric heating ring (124) is electrically connected to the output end of the electric heating control module (36); The moisture inside the heated gas is quickly absorbed by the through-hole active silica gel disc (123) in the moisture collecting mechanism (12) on the upper layer of the material, thereby avoiding condensation due to contact with cold air, while the dry gas continues to be discharged upward along the through-hole.

2. The device for measuring the moisture content of ore powder according to claim 1, characterized in that: The measuring device body (2) is internally installed with an embedded single-chip microcomputer (43), a power module (42), a weighing sensor (32), an alarm module (33), a timing module (34), a first motor drive module (35) and an electric heating control module (36); the input end of the embedded single-chip microcomputer (43) is electrically connected to the output end of the weighing sensor (32), the timing module (34) and the power module (42); the output end of the embedded single-chip microcomputer (43) is electrically connected to the output end of the alarm module (33), the display screen (3), the first motor drive module (35), the electric heating control module (36) and the conductive sheet (30); and the output end of the first motor drive module (35) is electrically connected to the input end of the electric push rod (16).

3. The device for measuring the moisture content of ore powder according to claim 2, characterized in that: A power circuit board (25) is installed on the bottom surface of the transmission chamber (4), and the output end of the conductive sheet (30) is electrically connected to the input end of the power circuit board (25). A second motor drive module (37) and a second electric heating control module (38) are installed on the power circuit board (25).

4. The device for measuring the moisture content of ore powder according to claim 3, characterized in that: Electromagnets (31) are provided on both sides of the conductive sheet (30), and the electromagnets (31) are embedded in the positioning groove (29), and the input end of the embedded single-chip microcomputer (43) is electrically connected to the input end of the electromagnet (31).

5. The device for measuring the moisture content of ore powder according to claim 4, characterized in that: Guide columns (13) are installed on both sides above the moisture collection mechanism (12), and one end of the guide column (13) passes through and extends to the upper end of the top plate (11), a linear bearing (14) is installed at the connection between the top plate (11) and the guide column (13), and a limit block (15) is installed at one end of the guide column (13).

6. The device for measuring the moisture content of ore powder according to claim 5, characterized in that: A laser distance sensor (40) is installed at a middle position inside the through-hole active silica gel disk (123), and an output end of the laser distance sensor (40) is electrically connected to an input end of an embedded single chip microcomputer (43).

7. The device for measuring the moisture content of ore powder according to claim 6, characterized in that: An asynchronous motor (5) is installed at the upper end of one side of the transmission chamber (4), the output end of the asynchronous motor (5) passes through and extends to the interior of the transmission chamber (4), and is installed with a first pulley (20), the interior of the first pulley (20) is installed with a rotating shaft (21), the lower end of the rotating shaft (21) is rotatably connected to the inner wall of the transmission chamber (4) through a bearing (22), a second pulley (23) is provided inside the transmission chamber (4), the second pulley (23) is connected to the first pulley (20) through a belt (24), the upper end of the second pulley (23) is installed with a stirring shaft (26), and one end of the stirring shaft (26) passes through the heating chamber (6) and extends to the interior of the heating cylinder (7), and both sides of the stirring shaft (26) are installed with heat-conducting stirring blades (27).

8. The device for measuring the moisture content of ore powder according to claim 7, characterized in that: An electric heating wire (39) is installed inside the stirring shaft (26), and the heating cylinder (7) includes an insulating outer cylinder (701) and a heat-insulating inner cylinder (702). The insulating outer cylinder (701) is arranged outside the heat-insulating inner cylinder (702), and a partition (17) is arranged between the insulating outer cylinder (701) and the heat-insulating inner cylinder (702). There are four partitions (17), and electric heating nets (18) are installed inside the four partitions (17). A partition (19) is installed between adjacent partitions (17). The output end of the electric heating control module 2 (38) is electrically connected to the input end of the electric heating wire (39), the electric heating net (18) and the electric heating coil (28).

9. The control method of the device for measuring the moisture content of ore powder according to claim 8, characterized in that: The following steps are involved: Step 1: Remove the heating tube (7) from the measuring device body (2), pour the ore powder to be tested, and then re-place the heating tube (7) in the positioning groove (29) of the measuring device body (2). After placement, the conductive sheet (30) in the positioning groove (29) is connected to the power circuit board (25) below the transmission chamber (4) at the bottom of the heating tube (7), thereby realizing power supply to the entire device; Step 2: During the detection, the weight of the material in the current container is first weighed by the weighing sensor (32), and the data is fed back to the embedded single-chip microcomputer (43). After receiving the data, the embedded single-chip microcomputer (43) sends signals to the electromagnet (31) and the laser distance sensor (40), respectively. The electromagnet (31) adsorbs and fixes the transmission chamber (4) at the bottom of the heating cylinder (7), and the laser distance sensor (40) at the center of the through-hole active silica gel disk (123) can detect the distance between the through-hole active silica gel disk (123) and the material, and feeds the information back to the embedded single-chip microcomputer (43); Step 3: After the embedded single chip microcomputer (43) receives the signal sent by the laser ranging sensor (40), it transmits data with the power circuit board (25) to drive the first motor driving module (35), the second motor driving module (37), the electric heating control module 1 (36) and the electric heating control module 2 (38) to operate, wherein the first motor driving module (35) drives the electric push rod (16) to operate according to the ranging information just received, so that the moisture collection mechanism (12) moves down to the position above the material, while the electric heating control module 1 (36) and the electric heating control module 2 (38) drive the electric heating ring (124), the electric heating coil (28), the electric heating wire (39) and the electric heating network (18) to operate , four groups of electric heating nets (18) are equidistantly arranged in the interlayer of the heating cylinder (7), and the number of openings is determined according to the material height determined by the distance measurement information to reduce energy consumption. While the electric heating ring (124), the electric heating coil (28) and the electric heating net (18) are heating the material in a covering manner, the second motor drive module (37) drives the asynchronous motor (5) to operate, and the belt (24) transmission mechanism is used to drive the stirring shaft (26) to rotate, and the heat-conducting stirring blades (27) make the material float up and down, making the heating process more thorough, and the moisture inside the heated gas is quickly adsorbed by the through-hole active silica gel disk (123) in the upper moisture collection mechanism (12) of the material to avoid condensation in contact with cold air, while the dry gas continues to be discharged upward along the through-hole; Step 4: After heating for three minutes, the timing module (34) sends a signal to the embedded single-chip microcomputer (43) to drive the weighing sensor (32) to weigh again. If there is no obvious change in the weighing information this time, it means that there is a fault in the device heating system. At this time, the embedded single-chip microcomputer (43) will send a signal to the alarm module (33) to remind personnel to inspect. If the weighing sensor (32) changes, the weight is recorded and the weighing measurement is maintained. After the weight no longer changes, the electric push rod (16) contracts and drives the moisture collection mechanism (12) to withdraw from the heating cylinder (7). After withdrawal, the electromagnet (31) stops adsorption. The weighing sensor (32) measures again and transmits the data to the embedded single-chip microcomputer (43). The embedded single-chip microcomputer (43) calculates the change in the weight of the material and finally displays the calculated moisture content result on the display screen (3).

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