Probe self-centering device for annular furnace dew point detection gas taking device and control method thereof

Abstract

This invention relates to the field of steel coil heat treatment technology, specifically to a self-aligning device for a gas sampling probe in a ring furnace dew point detection system and its control method. It includes: a first-layer mounting base plate with a Z-direction electric cylinder on its front side along the Z-direction; a second-layer mounting base plate slidably stacked on the first layer along the Z-direction, driving it to reciprocate along the Z-direction, and an X-direction electric cylinder on its front side along the X-direction; a third-layer mounting base plate slidably stacked on the second layer along the X-direction, driving it to reciprocate along the X-direction, and a cylinder mounting support on its front side. The cylinder is elastically connected to the support, with a piston rod at its front end having a first gas passage; a receiving mechanism is fixed to the end of the gas sampling pipe inside the ring furnace shroud, with a guide opening at its front end, a second gas passage at its center, one end sealed to the gas sampling pipe, and the other end connected to the piston rod. This invention eliminates the need for additional high-precision detection elements, automatically completing the gas sampling docking and disconnection actions, adapting to the intermittent start-stop production rhythm of the ring furnace.

Description

Technical Field

[0001] This invention relates to the field of steel coil heat treatment technology, specifically to a probe self-alignment device and control method for a gas sampling device for dew point detection in an annular furnace. Background Technology

[0002] Silicon steel is an indispensable soft magnetic functional material in modern industry, possessing excellent properties such as high magnetic induction and low iron loss. The high-temperature annealing process for grain-oriented silicon steel primarily employs an annular annealing furnace. The upper trolley of this furnace has 60 coiling positions evenly spaced along its circumference, with two heat-resistant alloy inner covers arranged radially along each position. The annular annealing furnace rotates intermittently around its central axis, stopping after each rotation cycle having passed one coiling position.

[0003] The steel coils to be annealed are placed in the inner shroud for annealing. Before entering the high-temperature annealing process, the steel coils are coated with an MgO annealing release agent coating. The Mg(OH)2 contained in the coating will decompose and release moisture at high temperatures, easily causing oxidation of the steel strip surface, affecting the magnetic properties of the product and the quality of the underlying layer. The moisture content of the furnace atmosphere is mainly monitored by extracting gas from the inner shroud for dew point detection. During the detection operation, when the annular furnace stops rotating, the dew point detector, fixedly arranged below the furnace body, automatically connects its inlet to the gas sampling pipe of the inner shroud, which rotates above it, through the gas sampling device, to extract gas from the shroud for detection. When the annular annealing furnace needs to rotate again, the gas sampling device automatically disconnects the dew point detector from the gas sampling pipe of the inner shroud, without affecting the normal operation of the furnace body.

[0004] However, in practical applications, after each shutdown of the annular annealing furnace, the stopping position of the gas sampling pipe interface above the detector exhibits random deviations, covering any direction within the 360° plane, with an amplitude of ±50mm. Therefore, to achieve automatic and precise sealing between the dew point detector's inlet and the inner cover's gas sampling pipe interface, the gas sampling device must be able to automatically adjust its position and angle according to the actual position of the gas sampling pipe interface. Currently, this process can only be completed manually, and there is no automatic gas sampling device that meets this functional requirement. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a self-aligning device for the probe of a gas sampling device for dew point detection in an annular furnace, comprising: a first-layer mounting base plate, with a Z-direction electric cylinder mounted on the front side along the Z-direction; The second mounting base plate is slidably stacked on top of the first mounting base plate in the Z direction. A first connecting plate is provided on the side of the second mounting base plate. The push rod of the Z-direction electric cylinder is connected to the first connecting plate, so that the Z-direction electric cylinder can drive the second mounting base plate to reciprocate along the Z direction. An X-direction electric cylinder is installed on the front of the second mounting base plate along the X direction. The third-layer mounting base plate is slidably stacked on top of the second-layer mounting base plate in the X direction. A second connecting plate is provided on the side of the third-layer mounting base plate. The push rod of the X-direction electric cylinder is connected to the second connecting plate, so that the X-direction electric cylinder can drive the third-layer mounting base plate to reciprocate along the X direction. A cylinder mounting bracket is installed on the front of the third-layer mounting base plate. A cylinder is elastically connected to a cylinder mounting bracket. A piston rod is installed at the front end of the cylinder, and the piston rod has a first air passage inside. The receiving mechanism is fixed to the end of the gas intake pipe of the inner shroud of the annular furnace. The front end of the receiving mechanism is a guide opening, and a second gas passage is opened in the center of the guide opening. One end of the second gas passage is sealed and connected to the gas intake pipe of the inner shroud of the annular furnace, and the other end of the second gas passage is used to dock with the front end of the piston rod.

[0006] Furthermore, it also includes: a first sliding guide rail and a second sliding guide rail arranged parallel to each other along the Z direction on the front side of the first mounting base plate; a first slider and a second slider are installed parallel to each other on the back side of the second mounting base plate, the first slider is installed on the first sliding guide rail and the second slider is installed on the second sliding guide rail, so that the second mounting base plate can slide linearly along the Z direction.

[0007] Furthermore, it also includes: a third sliding guide rail and a fourth sliding guide rail arranged parallel to each other along the X direction on the front side of the second mounting base plate; a third slider and a fourth slider are installed parallel to each other on the back side of the third mounting base plate, the third slider is installed on the third sliding guide rail and the fourth slider is installed on the fourth sliding guide rail, so that the third mounting base plate can slide linearly along the X direction.

[0008] Furthermore, it also includes: an inclinometer mounted on the cylinder block, with the Y-axis of the inclinometer parallel to the piston rod axis.

[0009] Furthermore, it also includes: a first magnetic switch, a second magnetic switch, and a third magnetic switch arranged sequentially along the piston rod axis of the cylinder.

[0010] A control method for the self-alignment device of the probe of a gas sampling device for dew point detection in an annular furnace, comprising: After the ring furnace rotates to the position and stops, the position of the cylinder is adjusted by driving the Z-direction electric cylinder and the X-direction electric cylinder. Each time the position of the cylinder is adjusted, the piston rod is extended. Then, the triggering state of the first magnetic switch, the second magnetic switch and the third magnetic switch is used to determine whether the end of the piston rod is in contact with the guide opening of the receiving mechanism. Until the end of the piston rod contacts the guide opening of the receiving mechanism, the position of the cylinder is corrected by driving the Z-direction electric cylinder and the X-direction electric cylinder according to the tilt angle of the cylinder in real time collected by the inclinometer. Until the absolute values ​​of the tilt angles of the X and Z axes are both less than or equal to the angle threshold θ, the control piston rod and the second gas passage of the receiving mechanism are connected to perform dew point detection. When the ring furnace receives the rotation start signal, the control piston rod retracts until the third magnetic switch is triggered.

[0011] Furthermore, the specific method for adjusting the position of the cylinder by driving the Z-direction electric cylinder and the X-direction electric cylinder is as follows: Set the maximum allowable displacement value Xmax in the X direction and the maximum allowable displacement value Zmax in the Z direction, with ΔL as the coarse adjustment step: The piston rod retracts until the third magnetic switch is triggered. The electric cylinder in the X direction extends by a coarse adjustment step value △L and records the current displacement value X. When X≤Xmax, the electric cylinder in the Z direction extends by a coarse adjustment step value △L and records the current displacement value Z. When Z≤Zmax, a positive Z-axis scan of the current displacement value X is performed. Specifically, the piston rod is extended. After the second magnetic switch is triggered, if the first magnetic switch is not triggered, it is determined that the cylinder end is in contact with the receiving mechanism. If the first magnetic switch is triggered, the piston rod is retracted until the third magnetic switch is triggered. The electric cylinder in the Z direction extends by another coarse adjustment step value △L and records the current displacement value Z. The positive Z-axis scan of the current displacement value X continues. Until Z > Zmax and the cylinder end has not yet contacted the receiving mechanism, the forward Z-axis scan of the current displacement value X ends and the reverse Z-axis scan is switched.

[0012] If the receiving mechanism is not contacted when X > Xmax, the driving of the Z-direction electric cylinder and the X-direction electric cylinder to adjust the position of the cylinder is stopped.

[0013] Furthermore, the specific method for the Z-axis reverse scanning is as follows: The X-direction electric cylinder extends by a coarse adjustment step value △L and records the current displacement value X; when X≤Xmax, the Z-direction electric cylinder retracts by a coarse adjustment step value △L and records the current displacement value Z; when Z>0, a reverse Z-direction scan of the current displacement value X is performed, specifically: the piston rod is extended, and after the second magnetic switch is triggered, if the first magnetic switch is not triggered, it is determined that the cylinder end has contacted the receiving mechanism; if the first magnetic switch is triggered, the piston rod is retracted until the third magnetic switch is triggered, the Z-direction electric cylinder retracts by a coarse adjustment step value △L and records the current displacement value Z, and the reverse Z-direction scan of the current displacement value X continues; Until Z≤0 and the cylinder end has not yet contacted the receiving mechanism, the reverse Z-axis scan of the current displacement value X ends, and the process switches to the next displacement value X to perform the forward Z-axis scan of the next displacement value X.

[0014] Furthermore, the specific method for gradually correcting the position of the Z-direction electric cylinder and the X-direction electric cylinder according to the tilt angle until the absolute value of the tilt angle of the Z-axis is less than or equal to the angle threshold θ is as follows: Use △S as the fine-tuning step size; The Z-direction electric cylinder is controlled to perform stepping motions according to the Z-direction displacement increment m×△S; If the absolute value of the Z-axis tilt angle is greater than the angle threshold θ and is positive, then the Z-axis fine-tuning direction marker m is assigned a value of 1; if the absolute value of the Z-axis tilt angle is greater than the angle threshold θ and is negative, then the Z-axis fine-tuning direction marker m is assigned a value of -1; until the absolute value of the Z-axis tilt angle is less than or equal to the angle threshold θ.

[0015] Furthermore, the specific method for gradually correcting the position of the Z-direction electric cylinder and the X-direction electric cylinder according to the tilt angle until the absolute value of the tilt angle of the X-axis is less than or equal to the angle threshold θ is as follows: The electric cylinder in the X direction is controlled to perform a stepping action according to the X-direction displacement increment n×△S; If the absolute value of the X-axis tilt angle is greater than the angle threshold θ and is positive, then the X-axis fine-tuning direction marker n is assigned a value of -1; if the absolute value of the X-axis tilt angle is greater than the angle threshold θ and is negative, then the X-axis fine-tuning direction marker n is assigned a value of 1; until the absolute value of the X-axis tilt angle is less than or equal to the angle threshold θ.

[0016] The beneficial effects of this invention are as follows: 1. The extension mechanism is set on a two-degree-of-freedom platform in the X and Z directions and is driven by electric cylinders in the X and Z directions respectively. It can align the piston rod of the cylinder with the axis of the receiving mechanism in the initial state by adjusting the position of the piston rod of the cylinder, thus having a larger adjustment range.

[0017] 2. The lower part of the cylinder and the cylinder support are flexibly supported by springs. When the axes of the extension mechanism and the receiving mechanism are not aligned, the cylinder will tilt because the contact surface between the receiving mechanism and the extension mechanism is inclined. A high-precision inclinometer detects the tilt angle of the cylinder and adjusts the extension length of the electric cylinder push rod in the X and Z directions according to the tilt angle, so that the axes of the extension mechanism and the receiving mechanism are aligned, resulting in better sealing and preventing air leakage.

[0018] 3. The system adopts a two-stage control logic of coarse positioning and fine alignment. The contact state between the piston rod and the receiving mechanism is determined by the magnetic switch arranged axially on the cylinder, which completes the coarse search of the receiving mechanism's position. Then, the position is corrected by the electric cylinders in the X and Z directions driven by the tilt angle collected in real time by the inclinometer, so as to achieve precise alignment of the axis. It can automatically complete the gas intake docking and disconnection actions without the need for additional high-precision detection elements, which is suitable for the intermittent start-stop production rhythm of the ring furnace. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the probe self-alignment device of the annular furnace dew point detection gas sampling device of the present invention; Figure 2 This is a schematic diagram of the cylinder assembly structure of the present invention; Figure 3 This is a schematic diagram of the front structure of the third layer mounting base plate of the present invention; Figure 4 This is a schematic diagram of the back structure of the third layer mounting base plate of the present invention; Figure 5 This is a schematic diagram of the front structure of the second layer mounting base plate of the present invention; Figure 6 This is a schematic diagram of the back structure of the second layer mounting base plate of the present invention; Figure 7 This is a schematic diagram of the front structure of the first layer mounting base plate of the present invention; Figure 8 This is a schematic diagram of the overall flow of the self-centering control method of the present invention; Figure 9 This is a schematic diagram of the control flow for the coarse alignment stage of the present invention; Figure 10 This is a schematic diagram of the control flow for the fine-tuning and centering stage of this invention.

[0020] Explanation of reference numerals in the attached drawings: 1-First mounting base plate; 2-Second mounting base plate; 3-Third sliding guide rail; 4-Third slider; 5-Third mounting base plate; 6-Z-direction electric cylinder; 7-First connecting plate; 8-Second connecting plate; 9-Cylinder mounting support; 10-First support spring; 11-Second support spring; 12-Cylinder; 13-Inclinometer; 14-X-direction electric cylinder; 15-First sliding guide rail; 16-First slider; 17-Receiving mechanism; 18-First nut; 19-Second nut; 20-Third nut; 21-Fourth nut; 22-Fourth slider; 23-Fourth sliding guide rail; 24-Second slider; 25-Second sliding guide rail; 26-First mounting hole; 27-Second mounting hole; 28-Third mounting hole; 29-Fourth mounting hole; 30-First magnetic switch; 31-Second magnetic switch; 32-Third magnetic switch; 33-Piston rod; 34-Guide opening. Detailed Implementation

[0021] Example 1 A self-aligning device for a dew point detection gas sampling device in an annular furnace employs a three-layer stacked two-dimensional adjustment platform. With the docking axis of the piston rod 33 of cylinder 12 as the Y-axis and the receiving mechanism as the positive axis, the X and Z directions are two orthogonal motion directions within the docking plane perpendicular to the Y-axis, jointly achieving the position adjustment of the cylinder within the plane. Specifically, it includes: like Figure 7 As shown, the first-layer mounting base plate 1 serves as the fixing base for the equipment. The four corners of the plate are provided with a first mounting hole 26, a second mounting hole 27, a third mounting hole 28, and a fourth mounting hole 29 for the overall installation and fixing of the equipment. A Z-direction electric cylinder 6 is fixedly installed on the front of the first-layer mounting base plate 1 near its lower edge in the Z-direction. At the middle position along the Z-direction on the front of the first-layer mounting base plate 1, a first sliding guide rail 15 and a second sliding guide rail 25 are arranged in parallel, forming a first guide pair arranged in the Z-direction.

[0022] like Figure 5 and Figure 6 As shown, the second mounting base plate 2 is a Z-axis moving layer, stacked on top of the first mounting base plate 1. A first slider 16 and a second slider 24 are fixedly mounted on its back side along the Z-axis on the upper and lower sides, respectively, forming a first guide rail pair arranged in the Z-axis. The first slider 16 is fitted onto the first sliding guide rail 15, and the second slider 24 is fitted onto the second sliding guide rail 25, allowing the second mounting base plate 2 to slide linearly along the Z-axis. A first connecting plate 7 is welded to the side edge of the second mounting base plate 2, and the first connecting plate 7 is arranged perpendicular to the lower edge of the plate. The front end of the push rod of the Z-axis electric cylinder 6 passes through the round hole of the first connecting plate 7 and is locked in place by the first nut 18 and the second nut 19. The Z-axis electric cylinder 6 drives the second mounting base plate 2 to reciprocate along the Z-axis. An X-direction electric cylinder 14 is fixedly installed on the front of the second-layer mounting base plate 2 in the X direction near the right edge; a third sliding guide rail 3 and a fourth sliding guide rail 23 are arranged parallel to each other in the Z direction on the front of the second-layer mounting base plate 2, and the two guide rails extend in the X direction to form a second guide pair arranged in the X direction.

[0023] like Figure 3 and Figure 4 As shown, the third mounting base plate 5 is an X-axis movable layer, stacked on top of the second mounting base plate 2. A third slider 4 and a fourth slider 22 are fixedly mounted parallel to each other on its back, forming a second guide rail pair arranged in the X-axis. The third slider 4 is fitted onto the third sliding guide rail 3, and the fourth slider 22 is fitted onto the fourth sliding guide rail 23, allowing the third mounting base plate 5 to slide linearly along the X-axis. A second connecting plate 8 is welded to the side edge of the third mounting base plate 5, and the second connecting plate 8 is arranged perpendicular to the right edge of the plate. The front end of the push rod of the X-axis electric cylinder 14 passes through the round hole of the second connecting plate 8 and is locked in place by the third nut 20 and the fourth nut 21. The X-axis electric cylinder 14 drives the third mounting base plate 5 to reciprocate along the X-axis. A cylinder mounting bracket 9 is fixedly mounted at the center of the front of the third mounting base plate 5.

[0024] like Figure 2As shown, the lower ends of the first support spring 10 and the second support spring 11 are welded and fixed to the upper part of the cylinder mounting bracket 9, and the upper ends of the two springs are welded and fixed to the lower part of the cylinder body of the cylinder 12, so that the cylinder 12 can be flexibly mounted in a small-angle deflection state. The front end of the cylinder 12 has a piston rod 33, and the end of the piston rod 33 is provided with a semi-circular ball head. An axial air hole is opened in the center of the ball head. The air hole is connected to the first air passage inside the piston rod 33, forming a transmission path for the detection gas. A high-precision inclinometer 13 is installed on the upper surface of the cylinder body of the cylinder 12. Its Y-axis is parallel to the axis of the piston rod 33, and the direction pointing to the receiving mechanism 17 is the positive direction, which is used to detect the deflection angle of the cylinder in real time. The upper front end of the cylinder 12 is arranged sequentially along the axial direction of the piston rod 33 with a first magnetic switch 30, a second magnetic switch 31, and a third magnetic switch 32, which are used to detect the extension and retraction positions of the piston rod 33.

[0025] like Figure 1 As shown, the receiving mechanism 17 is fixed to the end of the gas intake pipe of the inner shroud of the annular furnace. Its front end is a trumpet-shaped guide opening 34, and a second gas passage is opened in the center of the guide opening 34. The second gas passage is connected to a threaded hole radially arranged at the rear end of the receiving mechanism 17. The threaded hole is used for a sealed connection with the gas intake pipe of the inner shroud. In the docking state, the semi-circular ball head of the piston rod 33 is embedded in the guide opening 34 of the receiving mechanism 17. Under the action of flexible support and centering adjustment, the conical surface of the ball head is tightly fitted with the inner wall of the trumpet opening to form a sealed gas passage.

[0026] A stacked transmission structure, consisting of a Z-direction electric cylinder 6 driving the second-layer mounting base 2 and an X-direction electric cylinder 14 driving the third-layer mounting base 5, enables independent displacement adjustment of cylinder 12 in the X and Z orthogonal directions within the docking plane. This replaces manual alignment operations and automates the air intake docking process. Cylinder 12 is installed on cylinder mounting support 9 using a flexible connection. In conjunction with the guide opening 34 at the front end of receiving mechanism 17, the piston rod 33 can undergo adaptive small-angle deflection during docking using a beveled guide, reducing initial alignment accuracy requirements and preventing damage to components from hard collisions. Simultaneously, the ball head of piston rod 33 and the inner wall of guide opening 34 form a conical sealing seal, reducing air leakage and ensuring the accuracy of dew point detection data. The Y-axis of inclinometer 13 is parallel to the axis of piston rod 33, allowing for precise acquisition of the tilt angle of cylinder 12 in the X and Z directions. This accurately reflects the direction and magnitude of the axial deviation between piston rod 33 and receiving mechanism 17, providing quantitative feedback for electric cylinder position correction during fine-tuning and achieving closed-loop precise alignment of the axis. The third magnetic switch 32, the second magnetic switch 31, and the first magnetic switch 30 can correspond to the three states of the piston rod 33: fully retracted, extended to the reference position, and fully extended, respectively. They provide reliable signals for contact determination during coarse adjustment scanning. If the second magnetic switch 31 is triggered and the first magnetic switch 30 is not triggered, it can be determined that the end of the piston rod 33 is in contact with the receiving mechanism 17, without the need for an additional displacement sensor.

[0027] Example 2 The present invention also provides a control method for the self-alignment device of the probe of the dew point detection gas sampling device of the annular furnace, which is executed by the self-alignment device of the probe of the annular furnace dew point detection gas sampling device in Example 1.

[0028] In the control flow described below, Z=0 corresponds to the mechanical zero position of the fully retracted electric cylinder 6 in the Z direction, which is the physical lower limit of the Z-direction stroke. An increase in the Z value corresponds to the extension of the electric cylinder push rod, and Zmax is the maximum extension position of the electric cylinder, which is the physical upper limit of the Z-direction stroke. X=0 corresponds to the retraction mechanical zero position of the electric cylinder 14 in the X direction, and Xmax is the maximum extension position. The X and Z directions are orthogonal, and together they form a rectangular adjustable area of ​​0≤X≤Xmax and 0≤Z≤Zmax.

[0029] The specific control process is as follows: I. Overall control process, such as Figure 8 As shown.

[0030] S1, System startup, process begins; S2, Execute parameter initialization: Set coarse adjustment step value △L=5mm, fine adjustment step value △S=1mm; Set initial displacement value X=-5mm for X-axis electric cylinder 14, maximum allowable displacement value Xmax=100mm; Set initial displacement value Z=-5mm for Z-axis electric cylinder 6, maximum allowable displacement value Zmax=100mm; Set Z-axis fine adjustment direction mark m=0, X-axis fine adjustment direction mark n=0; Clear the X-axis tilt angle and Z-axis tilt angle of inclinometer 13 to zero; Set axis alignment angle threshold θ=0.1°; S3, the system enters standby mode; S4, Real-time determination of whether the ring furnace has rotated to the correct position and stopped; if the determination result is negative, return to step S3 and continue waiting; if the determination result is positive, proceed to the next step; S5, execute the coarse adjustment stage alignment process to make the end of the piston rod 33 initially dock with the guide opening 34 of the receiving mechanism 17; S6, execute the fine-tuning stage alignment process to precisely align cylinder 12 with the axis of the receiving mechanism, form a sealed air path, and begin dew point detection; S7, enter detection waiting state; S8, determine in real time whether the ring furnace has received a rotation start signal; if the result is no, return to step S7 to continue detection; if the result is yes, proceed to the next step; S9 controls the piston rod to retract. S10, determine whether the third magnetic switch 32 has been triggered; if the result is no, return to step S9 and continue to retract; if the result is yes, proceed to the next step. S11, determine whether to terminate all gas sampling and detection tasks; if the result is no, return to step S3 and enter the next round of alignment detection loop; if the result is yes, proceed to the next step; S12, control flow ends.

[0031] After the annular furnace stops rotating in place, the alignment process is automatically started. Upon receiving the rotation start signal, the piston rod 33 of the cylinder 12 is automatically controlled to retract. The retraction is determined by the triggering of the third magnetic switch 32, ensuring accurate reset position and avoiding interference with the rotating inner cover gas intake pipe. This matches the intermittent rotation and stop rhythm of the annular furnace, replacing manual docking operation.

[0032] II. Coarse Adjustment Stage Control Flow The coarse adjustment stage employs a line-by-line scanning alignment method to quickly locate the receiving mechanism's position using large step increments. Figure 9 As shown, the specific steps are as follows: S501, coarse adjustment process initiated; S502, controls the piston rod 33 to perform a retraction action; S503, determine whether the third magnetic switch 32 has been triggered; if the result is no, return to step S502 and continue to retract; if the result is yes, proceed to the next step; S504, control the X-direction electric cylinder 14 push rod to extend by a coarse adjustment step value △L, and record the current displacement value X; S505, determine whether the current displacement value X is less than or equal to the maximum allowable displacement value Xmax; if the result is no, determine that the device is out of the adjustable range, and jump to step S12 to end the overall process; if the result is yes, proceed to the next step; S506, control the Z-direction electric cylinder 6 push rod to extend by a coarse adjustment step value △L, and record the current displacement value Z; S507, determine whether the current displacement value Z is less than or equal to the maximum allowable displacement value Zmax; if the result is no, jump to step S513 to perform a reverse scan of the branch in the Z direction; if the result is yes, proceed to the next step; S508 controls the piston rod 33 to extend; S509, determine whether the second magnetic switch 31 has been triggered; if the result is no, return to step S508 and continue to extend; if the result is yes, proceed to the next step. S510, determine whether the first magnetic switch 30 has been triggered; if the result is no, determine that the end of the piston rod 33 has contacted the guide opening 34 of the receiving mechanism 17, the coarse adjustment stage ends, and jump to step S601 to enter the fine adjustment stage; if the result is yes, determine that there is no receiving mechanism 17 at the current position, and proceed to the next step. S511 controls the piston rod to retract; S512, determine whether the third magnetic switch 32 has been triggered; if the result is no, return to step S511 and continue to retract; if the result is yes, return to step S505 and continue the Z-axis forward scan of the current X row. S513, control the X-direction electric cylinder 14 push rod to extend by a coarse adjustment step value △L, and record the current displacement value X; S514, determine whether the current displacement value X is less than or equal to the maximum allowable displacement value Xmax; if the result is no, determine that the equipment is out of the adjustable range, and jump to step S12 to end the overall process; if the result is yes, proceed to the next step. S515, control the Z-direction electric cylinder 6 push rod to move back one coarse adjustment step value △L, and record the current push rod displacement value Z; S516, determine whether the current displacement value Z is less than or equal to 0; if the result is yes, jump to step S504, switch to the next row X position to perform forward scan; if the result is no, proceed to the next step. S517 controls the piston rod 33 to extend; S518, determine whether the second magnetic switch 31 has been triggered; if the result is no, return to step S517 and continue to extend; if the result is yes, proceed to the next step. S519, determine whether the first magnetic switch 30 has been triggered; if the result is no, determine that the end of the piston rod 33 has contacted the guide opening 34 of the receiving mechanism 17, the coarse adjustment stage ends, and jump to step S601 to enter the fine adjustment stage; if the result is yes, determine that there is no receiving mechanism at the current position, and proceed to the next step. S520 controls the piston rod 33 to perform a retraction action; S521, determine whether the third magnetic switch 32 has been triggered; if the result is no, return to step S520 and continue to retract; if the result is yes, return to step S515 and continue the Z-direction reverse scan of the current X row.

[0033] The coarse adjustment phase employs an S-shaped reciprocating grid scanning strategy, traversing the entire adjustable area line by line to quickly locate the position of the receiving mechanism 17. Forward scanning in the Z direction involves fixing the current displacement value X, with the Z-direction electric cylinder 6 using ΔL as the coarse adjustment step value, progressing point by point from 0 to Zmax along the increasing Z-value direction. At each step, the piston rod 33 extends, and the status of three magnetic switches determines whether contact with the receiving mechanism has occurred; if no contact is found, the piston rod 33 retracts, and the Z-direction stepping continues. If Z > Zmax and contact is still not found, the forward scanning of the current X lines ends. Reverse scanning in the Z direction occurs after the current X lines of forward scanning have finished. After advancing one ΔL step in the X direction to the next line, the Z-direction electric cylinder 6 changes to using ΔL as the step size, progressing point by point along the decreasing Z-value direction from Zmax to 0, similarly extending the piston rod 33 point by point to detect contact status. If Z ≤ 0 and contact is still not found, the reverse scanning of the current X lines ends. The alternating scanning method avoids cylinder backlash during idle strokes, improving traversal efficiency while ensuring complete coverage of all adjustable areas.

[0034] III. Fine-tuning Stage Control Flow: The fine-tuning stage utilizes closed-loop fine-tuning based on the angle feedback from the inclinometer to achieve precise axis alignment. Figure 10 As shown, the specific steps are as follows: S601, fine-tuning subprocess initiated; S602 controls the Z-direction electric cylinder 6 to move, with the Z-direction displacement increment being m×△S; S603, read the Z-axis tilt angle of the inclinometer 13. If the absolute value of the reading is greater than the angle threshold θ and the reading is positive, then assign the Z-axis fine-tuning direction mark m to 1 and return to step S602. S604, If the absolute value of the Z-axis tilt angle is greater than the angle threshold θ and the reading is negative, then assign the Z-axis fine-tuning direction mark m to -1 and return to step S602. S605, If the absolute value of the Z-axis tilt angle is less than or equal to the angle threshold θ, the Z-axis direction alignment is determined to be complete, and proceed to the next step; S606 controls the X-direction electric cylinder 14 to move, with the X-direction displacement increment being n×△S; S607, read the X-axis tilt angle of the inclinometer 13. If the absolute value of the reading is greater than the angle threshold θ and the reading is positive, then assign the X-axis fine-tuning direction mark n to -1 and return to step S606. S608, If the absolute value of the X-axis tilt angle is greater than the angle threshold θ and the reading is negative, then assign the X-axis fine-tuning direction mark n to 1 and return to step S606. S609, If the absolute value of the X-axis tilt angle is less than or equal to the angle threshold θ, the X-axis direction alignment is determined to be complete, and proceed to the next step; S610, the fine-tuning stage ends, the coaxiality of cylinder 12 and receiving mechanism 17 meets the sealing requirements, the detection gas is formally introduced, and the process returns to the main process step S7.

[0035] During the fine-tuning stage, the real-time angle data from the inclinometer 13 serves as feedback. First, the Z-axis angle is corrected via the Z-direction electric cylinder 6, and then the X-axis angle is corrected via the X-direction electric cylinder 14. This is done by adjusting the angle step size ΔS until the tilt angles of both axes are less than the angle threshold θ (e.g., 0.1°). This ensures that the angle between the axes of the cylinder 12 and the receiving mechanism 17 is controlled within 0.1°, allowing the ball end of the piston rod 33 to fit uniformly against the inner wall of the guide opening 34, improving the air path sealing performance and reducing sampling gas leakage.

[0036] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A probe self-alignment device for a gas sampling device for dew point detection in an annular furnace, characterized in that, include: The first layer is the mounting base plate (1), and a Z-direction electric cylinder (6) is mounted on the front along the Z direction. The second-layer mounting base plate (2) is slidably stacked on top of the first-layer mounting base plate (1) in the Z direction. The second-layer mounting base plate (2) has a first connecting plate (7) on its side. The push rod of the Z-direction electric cylinder (6) is connected to the first connecting plate (7), so that the Z-direction electric cylinder (6) can drive the second-layer mounting base plate (2) to reciprocate along the Z direction. The front of the second-layer mounting base plate (2) is equipped with an X-direction electric cylinder (14) along the X direction. The third-layer mounting base plate (5) is slidably stacked on top of the second-layer mounting base plate (2) in the X direction. A second connecting plate (8) is provided on the side of the third-layer mounting base plate (5). The push rod of the X-direction electric cylinder (14) is connected to the second connecting plate (8), so that the X-direction electric cylinder (14) can drive the third-layer mounting base plate (5) to reciprocate along the X direction. A cylinder mounting bracket (9) is installed on the front of the third-layer mounting base plate (5). The cylinder (12) is elastically connected to the cylinder mounting bracket (9). A piston rod (33) is installed at the front end of the cylinder (12). The piston rod (33) has a first air passage inside. The receiving mechanism (17) is fixed to the end of the gas intake pipe of the inner cover of the annular furnace. The front end of the receiving mechanism (17) is a guide opening (34). A second gas passage is opened in the center of the guide opening (34). One end of the second gas passage is sealed and connected to the gas intake pipe of the inner cover of the annular furnace. The other end of the second gas passage is used to dock with the front end of the piston rod (33).

2. The self-aligning device for the probe of the annular furnace dew point detection gas sampling device according to claim 1, characterized in that, Also includes: The first layer mounting base plate (1) has a first sliding guide rail (15) and a second sliding guide rail (25) arranged parallel to each other along the Z direction on the front side. The second mounting base plate (2) has a first slider (16) and a second slider (24) installed parallel to each other on its back. The first slider (16) is installed on the first sliding guide rail (15), and the second slider (24) is installed on the second sliding guide rail (25), so that the second mounting base plate (2) can slide linearly along the Z direction.

3. The self-aligning device for the probe of the annular furnace dew point detection gas sampling device according to claim 1, characterized in that, Also includes: The second-layer mounting base plate (2) has a third sliding guide rail (3) and a fourth sliding guide rail (23) arranged parallel to each other along the X direction on the front. The third mounting base plate (5) has a third slider (4) and a fourth slider (22) installed parallel to each other on the back. The third slider (4) is installed on the third sliding guide rail (3), and the fourth slider (22) is installed on the fourth sliding guide rail (23), so that the third mounting base plate (5) can slide in a straight line along the X direction.

4. The self-aligning device for the probe of the annular furnace dew point detection gas sampling device according to claim 1, characterized in that, Also includes: An inclinometer (13) is mounted on the cylinder body of cylinder (12), and the Y-axis of the inclinometer (13) is parallel to the axis of piston rod (33).

5. The self-aligning device for the probe of the annular furnace dew point detection gas sampling device according to claim 1, characterized in that, Also includes: The cylinder (12) has a first magnetic switch (30), a second magnetic switch (31), and a third magnetic switch (32) arranged sequentially along the piston rod (33).

6. A control method for the self-alignment device of the probe of a gas sampling device for dew point detection in an annular furnace, characterized in that, include: After the ring furnace rotates to the position and stops, the position of the cylinder (12) is adjusted by driving the Z-direction electric cylinder (6) and the X-direction electric cylinder (14). Each time the position of the cylinder (12) is adjusted, the piston rod (33) is extended. Then, the triggering state of the first magnetic switch (30), the second magnetic switch (31), and the third magnetic switch (32) is used to determine whether the end of the piston rod (33) is in contact with the guide opening (34) of the receiving mechanism (17). Until the end of the piston rod (33) contacts the guide opening (34) of the receiving mechanism (17), the position of the cylinder (12) is corrected by driving the Z-direction electric cylinder (6) and the X-direction electric cylinder (14) according to the tilt angle of the cylinder (12) in real time collected by the inclinometer (13) in the X-axis and Z-axis. Until the absolute values ​​of the tilt angles of the X-axis and Z-axis are both less than or equal to the angle threshold θ, the control piston rod (33) and the second gas passage of the receiving mechanism (17) are connected to perform dew point detection. When the ring furnace receives the rotation start signal, the control piston rod (33) retracts until the third magnetic switch (32) is triggered.

7. The control method for the probe self-alignment device of the annular furnace dew point detection gas sampling device according to claim 6, characterized in that, The specific method for adjusting the position of the cylinder (12) by driving the Z-direction electric cylinder (6) and the X-direction electric cylinder (14) is as follows: Set the maximum allowable displacement value Xmax in the X direction and the maximum allowable displacement value Zmax in the Z direction, with ΔL as the coarse adjustment step: The piston rod (33) is retracted until the third magnetic switch (32) is triggered. The electric cylinder (14) in the X direction extends by a coarse adjustment step value △L and records the current displacement value X. When X≤Xmax, the electric cylinder (6) in the Z direction extends by a coarse adjustment step value △L and records the current displacement value Z. When Z≤Zmax, a positive Z-direction scan of the current displacement value X is performed. Specifically, the piston rod (33) is extended. After the second magnetic switch (31) is triggered, if the first magnetic switch (30) is not triggered, it is determined that the end of the cylinder (12) is in contact with the receiving mechanism (17). If the first magnetic switch (30) is triggered, the piston rod (33) is retracted until the third magnetic switch (32) is triggered. The electric cylinder (6) in the Z direction extends by another coarse adjustment step value △L and records the current displacement value Z. The positive Z-direction scan of the current displacement value X continues. Until Z > Zmax, and the end of the cylinder (12) has not yet contacted the receiving mechanism (17), the forward scanning of the current displacement value X in the Z direction ends and the scanning of the reverse Z direction is switched. If the receiving mechanism (17) is not contacted when X > Xmax, the driving of the Z-direction electric cylinder (6) and the X-direction electric cylinder (14) is stopped to adjust the position of the cylinder (12).

8. The control method for the probe self-alignment device of the annular furnace dew point detection gas sampling device according to claim 7, characterized in that, The specific method for the Z-axis reverse scanning is as follows: The X-direction electric cylinder (14) extends by a coarse adjustment step value △L and records the current displacement value X; when X≤Xmax, the Z-direction electric cylinder (6) retracts by a coarse adjustment step value △L and records the current displacement value Z; when Z>0, the Z-direction reverse scan of the current displacement value X is performed, specifically: the piston rod (33) is extended, and after the second magnetic switch (31) is triggered, if the first magnetic switch (30) is not triggered, it is determined that the end of the cylinder (12) has contacted the receiving mechanism (17); if the first magnetic switch (30) is triggered, the piston rod (33) is retracted until the third magnetic switch (32) is triggered, the Z-direction electric cylinder (6) retracts by a coarse adjustment step value △L and records the current displacement value Z, and continues the Z-direction reverse scan of the current displacement value X; Until Z≤0 and the end of cylinder (12) has not yet contacted the receiving mechanism (17), the reverse scanning of the current displacement value X in the Z direction ends, and the next displacement value X is switched to perform the forward scanning of the next displacement value X in the Z direction.

9. The control method for the probe self-alignment device of the annular furnace dew point detection gas sampling device according to claim 6, characterized in that, The specific method for gradually correcting the position of the Z-direction electric cylinder (6) and the X-direction electric cylinder (14) according to the tilt angle until the absolute value of the tilt angle of the Z-axis is less than or equal to the angle threshold θ is as follows: Use △S as the fine-tuning step size; Control the Z-direction electric cylinder (6) to perform stepping motion according to the Z-direction displacement increment m×△S; If the absolute value of the Z-axis tilt angle is greater than the angle threshold θ and is positive, then the Z-axis fine-tuning direction marker m is assigned a value of 1; if the absolute value of the Z-axis tilt angle is greater than the angle threshold θ and is negative, then the Z-axis fine-tuning direction marker m is assigned a value of -1; until the absolute value of the Z-axis tilt angle is less than or equal to the angle threshold θ.

10. The control method for the probe self-alignment device of the annular furnace dew point detection gas sampling device according to claim 9, characterized in that, The specific method for gradually correcting the position of the Z-direction electric cylinder (6) and the X-direction electric cylinder (14) according to the tilt angle until the absolute value of the tilt angle of the X-axis is less than or equal to the angle threshold θ is as follows: The electric cylinder (14) in the X direction is controlled to perform a stepping action according to the X direction displacement increment n×△S; If the absolute value of the X-axis tilt angle is greater than the angle threshold θ and is positive, then the X-axis fine-tuning direction marker n is assigned a value of -1; if the absolute value of the X-axis tilt angle is greater than the angle threshold θ and is negative, then the X-axis fine-tuning direction marker n is assigned a value of 1; until the absolute value of the X-axis tilt angle is less than or equal to the angle threshold θ.

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