A zirconia analyzer

Abstract

The present application relates to the technical field of oxygen content measuring instruments, and provides a zirconia analyzer, which includes an instrument main body, a gas flow path system, an oxygen content detector, and a signal conversion system; the oxygen content detector includes a heating furnace and two zirconia tubes, and movable ports are respectively arranged at both ends of the heating furnace; a sliding base is slidably installed inside the instrument main body, and the two zirconia tubes are jointly fixed to the sliding base and are respectively located on two opposite sides of the heating furnace; the sliding base is further connected with a driving mechanism, and the driving mechanism is used to move the sliding base and make the two zirconia tubes alternately enter the adjacent movable ports. Based on this, the time consumed during the maintenance operation of the analyzer can be reduced, and the production efficiency of the production line can be improved.

Description

Technical Field

[0001] This application relates to the technical field of oxygen content measuring instruments, and particularly to a zirconia analyzer. Background Art

[0002] A zirconia analyzer is a commonly used oxygen concentration analysis sensor, which can be used for continuous automatic analysis of oxygen content in air separation nitrogen production, chemical processes, glass, and building materials. It can also be used for measuring the oxygen content in the protective atmosphere of high-temperature sintering furnaces such as protective gases and magnetic materials in the electronics industry to detect the stability of oxygen content in real time.

[0003] The principle of the zirconia analyzer for measuring oxygen concentration is to use the zirconia concentration difference potential to measure the oxygen content in the gas. The core of the instrument is an oxygen content detector. The oxygen content detector usually includes a zirconia tube and a heating furnace. The inner and outer surfaces of the zirconia tube are coated with porous platinum electrodes, and the zirconia tube is inserted into the sealed heating furnace. By introducing the test gas into the inner part of the zirconia tube, when the oxygen content of the test gas is different from that of the air outside the zirconia tube, an electromotive force E is generated on both sides of the zirconia tube, forming a concentration difference cell. The magnitude of the electromotive force of the oxygen concentration difference cell has a logarithmic relationship with the working temperature of the cell and the oxygen concentration difference on both sides of the cell. The oxygen content inside the zirconia tube, that is, the oxygen content of the flue gas introduced into the inner part of the zirconia tube, can be calculated through the Nernst equation.

[0004] However, the flue gas introduced into the inner part of the zirconia tube will inevitably carry dust particles, and the internal gas of the heating furnace also carries dust particles. After the analyzer is used for a period of time, ash accumulation is likely to occur on both sides of the zirconia tube, which will affect the measurement accuracy of the oxygen content in the flue gas. It is necessary to stop the analyzer, disassemble the zirconia tube, and blow-wash the zirconia tube to perform the maintenance operation of the analyzer. After the zirconia tube is disassembled, it is necessary to wait for its temperature to drop, and after the blow-washing is completed, the heating furnace needs to be reheated to increase the temperature of the zirconia tube, which takes a long time. As a result, it is difficult for the analyzer to monitor the flue gas concentration of the monitoring equipment for a long time. At this time, in order to ensure the production quality, the production equipment is often stopped, which will affect the production efficiency of the production line and needs to be improved. Summary of the Invention

[0005] In order to reduce the time consumed during the maintenance operation of the analyzer, this application provides a zirconia analyzer.

[0006] A zirconia analyzer provided by this application adopts the following technical solutions:

[0007] An oxygen zirconia analyzer, comprising an instrument main body, a gas flow path system for inputting flue gas, an oxygen content detector for measuring the oxygen content of the flue gas, and a signal conversion system for displaying the oxygen content value; wherein, the oxygen content detector includes a heating furnace and two zirconia tubes, the heating furnace is fixed inside the instrument main body, and movable openings are respectively provided at both ends of the heating furnace;

[0008] A sliding base is slidably installed inside the instrument main body, the sliding direction of the sliding base is the same as the axial direction of the heating furnace, the two zirconia tubes are jointly fixed on the sliding base, and the two zirconia tubes are respectively located on two opposite sides of the heating furnace, and each zirconia tube is directly opposite to the adjacent movable opening;

[0009] The sliding base is connected with a driving mechanism for driving the sliding base to move, so as to force the two zirconia tubes to alternately enter the adjacent movable openings; a sealing mechanism is arranged between the two zirconia tubes, so as to keep the heating furnace always in a sealed state when the zirconia tube leaves the heating furnace.

[0010] By adopting the above technical solution, the oxygen zirconia analyzer of the present application is provided with two zirconia tubes inside, and the two zirconia tubes can slide inside the instrument main body under the drive of the driving mechanism and can alternately enter the heating furnace; when the analyzer is in use, the flue gas is sent into the zirconia tube located inside the heating furnace through the gas flow path system, and the electromotive force on both sides inside and outside the zirconia tube is converted into an oxygen content value by the signal conversion system for display.

[0011] When the zirconia tube in use is fouled or damaged, resulting in a deviation in the measured value, by controlling the operation of the driving mechanism to drive the sliding base to move, the zirconia tube can be made to leave the heating furnace, and the other zirconia tube can be inserted into the heating furnace, and the heating furnace is always kept in a sealed state through the sealing mechanism, which is beneficial to maintaining the stability of the temperature inside the heating furnace, so as to facilitate the rapid increase of the temperature of the newly used zirconia tube to a range suitable for the temperature inside the furnace; and by switching the flow direction of the flue gas through the gas flow path system, the flue gas can enter the newly used zirconia tube, and the oxygen content in the flue gas can continue to be measured.

[0012] At this time, after the temperature of the zirconia tube to be removed from the heating furnace drops, the maintenance personnel can conveniently disassemble the zirconia tube and blow it. Since the other zirconia tube still continues to measure the oxygen content of the flue gas during the cooling waiting process of the zirconia tube, the analyzer can still monitor the oxygen content of the flue gas on the production equipment in real time, which can greatly reduce the time consumed for the maintenance operation of the analyzer and improve the production efficiency of the production line.

[0013] Optionally, a connection support is fixed to one end of the zirconia tube. The connection support and the sliding base are detachably fixed through fasteners. An air inlet channel and an air outlet channel are provided on the side surface of the connection support. The gas flow path system is respectively connected to the air inlet channel and the air outlet channel. A gas flow channel is provided inside the zirconia tube. Both ends of the gas flow channel are respectively communicated with the air inlet channel and the air outlet channel, and a part of the gas flow channel extends to the end of the zirconia tube away from the connection support.

[0014] By adopting the above technical solution, by connecting the gas flow path system to the air inlet channel and the air outlet channel of the zirconia tube, the flue gas input by the gas flow path system can enter the gas flow channel through the air inlet channel and leave the gas flow channel through the air outlet channel. By extending a part of the gas flow channel to the end of the zirconia tube away from the connection support, the flue gas can quickly enter the interior of the zirconia tube along the gas flow channel, so as to quickly form an electromotive force on both the inner and outer sides of the zirconia tube and improve the measurement accuracy.

[0015] Optionally, the sealing mechanism includes a support baffle and two groups of movable units respectively arranged on both side surfaces of the support baffle. First sealing gaskets are fixed on both side surfaces of the support baffle. Each zirconia tube is connected to the end of the movable unit away from the support baffle. When the support baffle abuts against the inner end wall of the heating furnace, the zirconia tube drives the movable unit to unfold, so that the zirconia tube completely leaves the heating furnace.

[0016] Among them, the movable unit includes a plurality of movable components arranged around the central axis of the support baffle. The movable component includes an elastic member and two hinged plates hinged to each other. One of the hinged plates is hinged to the support baffle, and the other hinged plate is hinged to the zirconia tube. The elastic member is connected between the two hinged plates and is used to force the two hinged plates to rotate towards each other under normal conditions.

[0017] By adopting the above technical solution, by arranging a support baffle between the two zirconia tubes, when the driving mechanism drives one of the zirconia tubes into the interior of the heating furnace, the support baffle can abut against the inner end wall of the heating furnace, and the sealing effect between the support baffle and the adjacent movable opening can be improved through the first sealing gasket. After the support baffle abuts against the inner end wall of the heating furnace, the zirconia tube partially exposed outside the heating furnace continues to move outwards, which can force the two hinged plates to rotate in the reverse direction, and then gradually bring each movable component into an unfolded state, so as to increase the distance between the zirconia tube and the heating furnace and improve the convenience for subsequent maintenance personnel to disassemble the zirconia tube.

[0018] Optionally, the outer diameter of the support baffle matches the inner diameter of the heating furnace. A plurality of through structure grooves are provided on the side surface of the support baffle, and the projection area of each structure groove to the side end surface of the heating furnace is misaligned with the movable opening.

[0019] By adopting the above technical solution, by setting the outer diameter of the support baffle to match the inner diameter of the heating furnace, when the driving mechanism drives the two zirconia tubes to move, the support baffle can abut against the inner wall of the heating furnace and move, playing a guiding role, reducing the possibility of axis deviation during the movement of the zirconia tube, and further reducing the possibility of the platinum electrode on the surface of the zirconia tube being scratched by the inner wall of the movable port. The structure groove is provided to allow the air in the furnace on both sides of the support baffle to flow mutually when the support baffle moves, so as to facilitate the normal switching of the two zirconia tubes.

[0020] Optionally, the number of movable components in a set of movable units is set to two, and the hinge axes of the two hinge plates in each movable component are both vertically arranged; two limiting mechanisms are also provided inside the instrument main body, and the two limiting mechanisms are respectively located on two opposite sides of the heating furnace; when the zirconia tube moves to the outside of the heating furnace, the movable component close to the zirconia tube is located outside the limiting mechanism, and the unfolding state of the movable component is fixed by controlling the action of the limiting mechanism.

[0021] By adopting the above technical solution, when the zirconia tube moves to the outside of the heating furnace, by controlling the action of the limiting mechanism to fix the unfolding state of the movable component, the acting force of the limiting mechanism on the movable component can offset the elastic force generated by the elastic member, thereby reducing the pulling force of the hinge plate on the zirconia tube under the action of the elastic force, reducing the possibility of local cracking of the zirconia tube due to force, and maintaining a good service life.

[0022] Optionally, the limiting mechanism includes a first telescopic member fixed inside the instrument main body and a limiting insertion post connected to the movable end of the first telescopic member. The movable end of the first telescopic member is normally in a retracted state. When the first telescopic member acts, the limiting insertion post is inserted into the inner sides of the hinge plates of the adjacent movable units in a matching manner.

[0023] By adopting the above technical solution, by controlling the action of the first telescopic member, the movable end of the first telescopic member drives the limiting insertion post to be inserted into the inner sides of the hinge plates, which can limit the rotation of the hinge plates, and further keep the unfolding states of the movable components fixed, so as to realize the unloading and force sharing effects on the elastic member and keep the zirconia tube in good service life.

[0024] Optionally, two heat insulation covers are provided inside the instrument main body, and the two heat insulation covers are respectively arranged on two opposite sides of the heating furnace, and each heat insulation cover covers the adjacent zirconia tube; a heat dissipation tube is integrally formed at the top of the heat insulation cover, and a heat dissipation port communicating with the heat dissipation tube is provided at the top of the instrument main body.

[0025] By adopting the above technical solution, by providing a heat shield, when the zirconia tube leaves the heating furnace driven by the driving mechanism, it can enter the interior of the heat shield. At this time, the heat on the surface of the zirconia tube can be directly dissipated to the outside of the instrument main body through the heat dissipation tube and the heat dissipation port, reducing the situation of heat spreading into the interior of the instrument main body, reducing the possibility of the internal temperature of the instrument main body being too high and causing the analyzer to automatically shut down, and ensuring the normal operation of the analyzer.

[0026] Optionally, the heat shield includes two symmetrically arranged heat shield sub-units, and the bottom end of each heat shield sub-unit is hinged to the instrument main body; the two adjacent heat shield sub-units are fixedly connected through a locking member.

[0027] By adopting the above technical solution, by connecting the two heat shield sub-units to each other under normal conditions through the locking member, the zirconia tube can be stably covered, reducing the situation of heat of the zirconia tube dissipating into the interior of the instrument main body; and when the temperature of the internal zirconia tube drops to the normal range, by disassembling the locking member and rotating the heat shield sub-units to separate the two heat shield sub-units from each other, the zirconia tube can be conveniently disassembled and purged.

[0028] Optionally, a clamping mechanism is provided on the side end face of the heating furnace. The clamping mechanism includes a rotating ring, a movable block and a second telescopic member. The rotating ring is rotatably connected to the heating furnace and is coaxially arranged around the periphery of the movable opening; the second telescopic member is rotatably connected to the heating furnace, and the movable end of the second telescopic member is hinged to the outer side wall of the rotating ring.

[0029] A plurality of inner convex portions are provided on the inner peripheral wall of the rotating ring, and all the inner convex portions are equidistantly arranged around the central axis of the rotating ring; the number of movable blocks is provided with a plurality, and all the movable blocks are jointly arranged inside the rotating ring, and each movable block is slidably connected to the heating furnace, and the sliding direction of the movable block coincides with the radial direction of the rotating ring.

[0030] A second sealing gasket is provided on the side of the movable block away from the rotating ring. When the second telescopic member drives the rotating ring to rotate, the inner convex portion abuts against the movable block and forces the movable block to move inward, so as to force the second sealing gasket to abut against the outer peripheral side of the zirconia tube.

[0031] By adopting the above technical solution, by controlling the action of the second telescopic member, the movable end of the second telescopic member extends outward to drive the rotating ring to rotate, so that each inner convex portion inside the rotating ring can gradually abut against each movable block, and during the rotation process, each inner convex portion can respectively push each movable block to approach each other, and further the second sealing gasket on the inner side surface of the movable block abuts tightly against the outer peripheral wall of the zirconia tube, so as to further improve the sealing effect between the zirconia tube and the movable opening and improve the accuracy of oxygen content measurement.

[0032] Optionally, the driving mechanism includes a threaded rod and a rotating motor. The threaded rod passes through the sliding base and is threadedly connected to the sliding base. Both ends of the threaded rod are rotatably mounted inside the instrument main body; the rotating motor is fixedly arranged, and the output end of the rotating motor is connected to the threaded rod for driving the threaded rod to rotate.

[0033] By adopting the above technical solution, by controlling the operation of the rotating motor to drive the threaded rod to rotate, the sliding base can be made to move along the axial direction of the threaded rod, and the threaded connection between the threaded rod and the sliding base has a self-locking effect, which can keep the zirconia tube in a stable position when the zirconia tube enters the heating furnace, so as to maintain a good seal between the zirconia tube and the heating furnace.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. By providing two zirconia tubes, and the two zirconia tubes alternately enter the heating furnace under the drive of the driving mechanism. When one zirconia tube is under maintenance, the other zirconia tube still continues to detect the oxygen content in the flue gas, thereby reducing the time consumed for the maintenance operation of the analyzer and improving the production efficiency of the production line;

[0036] 2. By providing the movable assembly, when the support baffle abuts against the inner end wall of the heating furnace, the zirconia tube exposed outside the heating furnace continues to move outward, which can force the two hinged plates to rotate in the opposite direction, and then make each movable assembly gradually in an unfolded state, so as to increase the distance between the zirconia tube and the heating furnace and improve the convenience for subsequent maintenance personnel to disassemble the zirconia tube;

[0037] 3. By providing the heat insulation cover, when the zirconia tube leaves the heating furnace, it enters the heat insulation cover. The heat on the surface of the zirconia tube can be directly dissipated to the outside of the instrument main body through the heat dissipation pipe and the heat dissipation port, reducing the possibility that the internal temperature of the instrument main body is too high and causing the analyzer to automatically shut down, and ensuring the normal operation of the analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the overall structural schematic diagram of this embodiment;

[0039] Figure 2 is the internal structural schematic diagram of the instrument main body after the heat insulation cover is disassembled in this embodiment;

[0040] Figure 3 is the partial cross-sectional view of the heating furnace in this embodiment;

[0041] Figure 4 is Figure 2 the enlarged view of part A in

[0042] Figure 5It is a half-sectional view of the zirconia tube and the connecting support in this embodiment;

[0043] Figure 6 It is a partial sectional view of the oxygen content detector in this embodiment, mainly showing the structures of the sealing mechanism and the limiting mechanism;

[0044] Figure 7 It is Figure 6 The enlarged view of part B in;

[0045] Figure 8 It is Figure 3 The enlarged view of part C in;

[0046] Figure 9 It is a schematic diagram of the internal structure of the instrument mainframe in this embodiment;

[0047] Figure 10 It is Figure 9 The enlarged view of part D in.

[0048] Explanation of reference numerals: 1. Instrument mainframe; 11. Heat dissipation port; 2. Gas flow path system; 21. Branch pipeline; 22. Reversing valve; 3. Oxygen content detector; 31. Heating furnace; 311. Movable port; 312. Third sealing gasket; 313. Annular clamping groove; 314. Movable groove; 32. Zirconia tube; 321. Gas flow channel; 33. Connecting support; 331. Intake channel; 332. Exhaust channel; 34. Sliding base; 341. Installation part; 35. Slide rail; 4. Signal conversion system; 5. Driving mechanism; 51. Threaded rod; 52. Rotating motor; 53. Support frame;

[0049] 6. Sealing mechanism; 61. Support baffle; 611. Structural groove; 62. Movable component; 621. Hinged plate; 622. Elastic member; 7. Limiting mechanism; 71. First telescopic component; 72. Limiting plug; 8. Clamping mechanism; 81. Rotating ring; 811. Inner convex part; 812. Annular convex block; 82. Movable block; 821. Second sealing gasket; 83. Second telescopic component; 9. Heat insulation cover; 91. Heat insulation sub-cover; 92. Heat dissipation pipe; 93. Locking component; 94. First avoidance hole; 95. Second avoidance hole. Detailed implementation manners

[0050] The following further elaborates on this application in conjunction with the attached Figure 1-10 drawings.

[0051] The embodiment of this application discloses a zirconia analyzer.

[0052] Refer to Figure 1, a zirconia analyzer, comprising an instrument main body 1, a gas flow path system 2 for conveying flue gas, an oxygen content detector 3 for measuring the oxygen content of the flue gas, and a signal conversion system 4 for displaying the oxygen content value; the gas flow path system 2, the oxygen content detector 3, and the signal conversion system 4 are all arranged inside the instrument main body 1. Refer to Figure 2 , wherein, the oxygen content detector 3 includes a heating furnace 31 and two zirconia tubes 32. The heating furnace 31 is fixed on the inner bottom surface of the instrument main body 1. A thermocouple is arranged inside the heating furnace 31, which is used to detect the temperature inside the furnace and convert the temperature signal into a thermal electromotive force signal, and is displayed through the signal conversion system 4. Also refer to Figure 3 , movable openings 311 communicating with the inside of the heating furnace 31 are respectively arranged at both ends of the heating furnace 31, and third sealing gaskets 312 are bonded to the inner walls of the movable openings 311.

[0053] Back to Figure 2 , a slide rail 35 is fixed on the inner bottom surface of the instrument main body 1. The slide rail 35 is located outside the heating furnace 31, and the extension direction of the slide rail 35 is the same as the axial direction of the heating furnace 31; a sliding base 34 is slidably mounted on the slide rail 35, so that the sliding base 34 can slide along the extension direction of the slide rail 35. A driving mechanism 5 for driving the sliding base 34 to move is further arranged on the inner bottom surface of the instrument main body 1. The driving mechanism 5 includes a threaded rod 51, a rotating motor 52, and a support frame 53; wherein, the number of the support frames 53 is two, and the two support frames 53 are respectively erected on the inner bottom surface of the instrument main body 1, and the two support frames 53 are respectively located on both sides of the sliding base 34 in the length direction; the threaded rod 51 is rotatably connected between the two support frames 53, and the threaded rod 51 passes through the sliding support and is threadedly connected to the sliding support. The rotating motor 52 is fixed on the inner bottom surface of the instrument main body 1, and the output end of the rotating motor 52 is fixedly connected to one end of the threaded rod 51. By controlling the operation of the rotating motor 52, the threaded rod 51 can be forced to rotate, thereby driving the sliding base 34 to move along the slide rail 35.

[0054] Refer to Figure 4, two mounting parts 341 are integrally formed on the side of the sliding base 34 close to the heating furnace 31, and the two mounting parts 341 are respectively located at both ends of the sliding base 34 in the length direction. A connecting support 33 is fixed to one end of each zirconia tube 32, and the two connecting supports 33 are respectively detachably fixed to the two mounting parts 341 through fasteners; the two zirconia tubes 32 are respectively located on two opposite sides of the heating furnace 31, and each zirconia tube 32 is disposed opposite to the adjacent movable port 311; the outer diameter of the zirconia tube 32 is set to be equal to the inner diameter of the movable port 311. When the rotation motor 52 is controlled to operate to drive the sliding base 34 to move along the slide rail 35, after one of the zirconia tubes 32 completely enters the heating furnace 31, the other zirconia tube 32 can move to the outside of the heating furnace 31 to realize the alternate entry of the two zirconia tubes 32 into the heating furnace 31.

[0055] Refer to Figure 5 , an air inlet channel 331 and an air outlet channel 332 are provided on the side surface of the connecting support 33, and the gas flow path system 2 is respectively connected to the air inlet channel 331 and the air outlet channel 332; a gas flow channel 321 is provided inside the zirconia tube 32, and both ends of the gas flow channel 321 are respectively connected to the air inlet channel 331 and the air outlet channel 332, and a part of the gas flow channel 321 extends to the end of the zirconia tube 32 away from the connecting support 33. Porous platinum electrodes are coated on the outer side surface of the zirconia tube 32 and the inner wall of the gas flow channel 321 to form an electromotive force on both sides inside and outside the zirconia tube 32. The gas flow path system 2 includes two groups of branch pipelines 21, and the two groups of branch pipelines 21 are respectively connected to the air inlet channels 331 of the two connecting supports 33, and the two groups of branch pipelines 21 are switched through a reversing valve 22, so that the flue gas entering the gas flow path system 2 can enter the corresponding zirconia tube 32 to realize the measurement of the oxygen content of the flue gas through the corresponding zirconia tube 32 located inside the heating furnace 31.

[0056] Refer to Figure 6 , a sealing mechanism 6 is further provided between the two zirconia tubes 32 to keep the heating furnace 31 always sealed when the zirconia tube 32 leaves the heating furnace 31. The sealing mechanism 6 includes a support baffle 61 and two groups of movable units respectively arranged on both side surfaces of the support baffle 61. One end of each movable unit away from the support baffle 61 is connected to the adjacent zirconia tube 32, so that the sealing mechanism 6 can move together with the two zirconia tubes 32.

[0057] Among them, the outer diameter of the support baffle 61 is set to be equal to the inner diameter of the heating furnace 31, which can play a guiding role during movement and is beneficial to improving the stability of the zirconia tube 32 during movement; multiple through structure grooves 611 are provided on the side surface of the support baffle 61, and all the structure grooves 611 are arranged equidistantly around the central axis of the support baffle 61, and the projection area of each structure groove 611 on the side end face of the heating furnace 31 is arranged offset from the movable opening 311. When the support baffle 61 moves along with the zirconia tube 32, the furnace air on both sides of the support baffle 61 flows through the structure grooves 611, which is beneficial to the normal switching of the two zirconia tubes 32; when the support baffle 61 moves to abut against the inner end wall of the heating furnace 31, the offset arrangement of the structure grooves 611 and the movable opening 311 can keep the inside of the heating furnace 31 in a good sealing effect; in addition, first sealing gaskets (not shown in the figure) are adhesively fixed on both side surfaces of the support baffle 61, which are used to further improve the sealing effect between the support baffle 61 and the movable opening 311 and improve the accuracy of oxygen content measurement.

[0058] Referring to Figure 7 , each movable unit includes multiple groups of movable components 62, all the movable components 62 are arranged around the central axis of the support baffle 61, and each movable component 62 is directly opposite to the movable opening 311; the number of the movable components 62 can be 2 groups, 3 groups, or 4 groups, which is selectively set according to actual needs; in this embodiment, the number of the movable components 62 is set to 2 groups.

[0059] The movable component 62 includes an elastic member 622 and two hinge plates 621. The edge positions of the two hinge plates 621 are hinged by a hinge shaft, and the axis direction of the hinge shaft is vertically arranged; one of the hinge plates 621 is hinged to the support baffle 61 on the side away from the hinge shaft, and the other hinge plate 621 is hinged to the zirconia tube 32 on the side away from the hinge shaft. The elastic member 622 is arranged between the two hinge plates 621. In this embodiment, the elastic member 622 is set as a torsion spring, the torsion spring is sleeved on the outer peripheral side of the hinge shaft, and the two ends of the torsion spring are respectively connected to the two hinge plates 621; the setting of the torsion spring can always generate a torsion force acting on the two hinge plates 621, so that the two hinge plates 621 rotate towards each other under normal conditions. When the support baffle 61 moves to abut against the inner end wall of the heating furnace 31, the adjacent zirconia tube 32 continues to move outwards, which can drive the two hinge plates 621 to rotate away from each other and gradually unfold, so that the zirconia tube 32 can completely leave the heating furnace 31, which is convenient for subsequent disassembly and flushing of the zirconia tube 32.

[0060] At the same time referring to Figure 6, a limiting mechanism 7 for keeping the movable component 62 in an unfolded state is further provided inside the instrument main body 1. There are two sets of the limiting mechanisms 7, and the two sets of limiting mechanisms 7 are respectively located on two opposite sides of the heating furnace 31; wherein, the limiting mechanism 7 includes a first telescopic component 71 fixed to the inner bottom surface of the instrument main body 1 and a limiting insertion post 72 connected to the movable end of the first telescopic component 71. The first telescopic component 71 is selected as an electric cylinder, and the first telescopic component 71 is in a normally retracted state. When the zirconia tube 32 moves to the outside of the heating furnace 31, the limiting insertion post 72 is located outside the movable unit close to the zirconia tube 32; the shape of the limiting insertion post 72 is set as a rhombus. By controlling the action of the first telescopic component 71 to move the limiting insertion post 72 outwards, the limiting insertion post 72 can be smoothly inserted into the inner sides of the hinge plates 621 of adjacent movable units, playing a limiting role to weaken the pulling force received by the zirconia tube 32 and enabling it to maintain a good service life.

[0061] Referring to Figure 8 , clamping mechanisms 8 are provided on both end faces of the heating furnace 31 for further improving the sealing effect between the zirconia tube 32 and the movable port 311; wherein, the clamping mechanism 8 includes a rotating ring 81, a movable block 82 and a second telescopic component 83. An integrally formed annular convex block 812 is provided on one side surface of the rotating ring 81, and an annular clamping groove 313 is provided on the outer end face of the heating furnace 31. The rotating ring 81 is rotationally connected to the heating furnace 31 through the cooperation of the annular convex block 812 and the annular clamping groove 313, and the rotating ring 81 is coaxially arranged around the periphery of the movable port 311. The second telescopic component 83 is also selected as an electric cylinder. The second telescopic component 83 is arranged outside the rotating ring 81. The cylinder body of the second telescopic component 83 is rotationally connected to the heating furnace 31, and the movable end of the second telescopic component 83 is hinged to the outer side wall of the rotating ring 81; the second telescopic component 83 is in a normally retracted state, and by controlling the action of the second telescopic component 83, the rotating ring 81 can be driven to rotate by a specific angle.

[0062] A plurality of sliding grooves are formed on the outer end face of the heating furnace 31, and all the sliding grooves are equidistantly arranged around the central axis of the rotating ring 81; each sliding groove is located between the rotating ring 81 and the movable port 311, and the extending direction of the sliding groove coincides with the radial direction of the rotating ring 81. The number of the movable blocks 82 is set to be equal to the number of the sliding grooves, and each movable block 82 is respectively slidably installed in each sliding groove; one side of each movable block 82 away from the rotating ring 81 is arc-shaped and connected with a second sealing rubber pad 821. In this embodiment, the movable block 82 is normally located outside the movable port 311, and part of the second sealing rubber pad 821 is normally located outside the movable port 311 under the action of gravity, and the other part of the second sealing rubber pad 821 is partially opposite to the movable port 311 under the action of gravity.

[0063] The inner peripheral wall of the rotating ring 81 is provided with a plurality of integrally formed inner convex portions 811, and all the inner convex portions 811 are equidistantly arranged around the central axis of the rotating ring 81; when the second telescopic member 83 is in the retracted state, the respective inner convex portions 811 are respectively arranged in a staggered manner with the respective movable blocks 82, and when the movable end of the second telescopic member 83 extends outward to drive the rotating ring 81 to rotate, the respective inner convex portions 811 can respectively abut against the adjacent movable blocks 82 and force the respective movable blocks 82 to approach each other. At this time, the second sealing rubber pads 821 on the inner sides of the respective movable blocks 82 jointly cover the outer peripheral wall of the zirconia tube 32 and cover the movable port 311, so as to further enhance the sealing effect between the zirconia tube 32 and the movable port 311.

[0064] Referring to Figure 9 , two heat shields 9 are further provided inside the instrument main body 1, and the two heat shields 9 are respectively located on two opposite sides of the heating furnace 31, and each heat shield 9 covers the adjacent zirconia tube 32; the heat shield 9 is located on the side of the adjacent limiting mechanism 7 away from the heating furnace 31, and a first avoidance hole 94 for the zirconia tube 32 to pass through, a second avoidance hole for the sliding base 34 to pass through, and a third avoidance hole for the slide rail 35 to pass through are provided on the side of the heat shield 9 close to the heating furnace 31. In addition, a heat dissipation tube 92 integrally formed is provided at the top of the heat shield 9. At the same time, referring to Figure 1 , a heat dissipation port 11 communicated with the heat dissipation tube 92 is provided inside the instrument main body. When the zirconia tube 32 leaves the heating furnace 31 and enters the inside of the heat shield 9, the heat on the surface of the zirconia tube 32 can be directly dissipated to the outer wall of the instrument main body 1 through the heat dissipation tube 92 and the heat dissipation port 11, reducing the occurrence of automatic shutdown caused by the increase in the temperature inside the instrument main body 1.

[0065] Returning to Figure 9 , the heat shield 9 of this embodiment includes two heat shield sub - covers 91, and the two heat shield sub - covers 91 jointly enclose a closed structure. It can be understood that the heat dissipation tube 92 and the first avoidance hole 94 are respectively arranged on the two heat shield sub - covers 91; at the same time, referring to Figure 10 , the bottom end of each heat shield sub - cover 91 is hinged to the inner bottom surface of the instrument main body 1, and the two heat shield sub - covers 91 are fixedly connected through a locking member 93. The locking member 93 of this embodiment includes a buckle ring and a buckle seat respectively fixed on the two heat shield sub - covers 91, and the buckle ring is matched and buckled to the buckle seat. When the zirconia tube 32 that has left the heating furnace 31 has completed heat dissipation, the two heat shield sub - covers 91 can be quickly separated through the locking member 93, and by rotating the heat shield sub - cover 91, the inner zirconia tube 32 can be conveniently disassembled and flushed. In addition, a temperature detector can be installed at the position of the heat dissipation port 11 of the instrument main body 1 to monitor the air temperature diffused to the outside of the instrument main body and display it through the signal conversion system 4, so as to determine whether the zirconia tube 32 has completed cooling.

[0066] In addition, for the smooth rotation of the heat insulation sub-cover 91, heat insulation rubber pads can also be adhesively fixed to the inner walls of the first avoidance hole 94, the second avoidance hole 95, and the third avoidance hole to play a role in avoidance.

[0067] The implementation principle of an oxygen zirconium analyzer according to an embodiment of the present application is as follows:

[0068] When the oxygen zirconium analyzer is in use, when the oxygen zirconium tube 32 in use is fouled or damaged, resulting in a deviation in the measured value, the control rotation motor 52 is operated to drive the sliding base to move, so that the oxygen zirconium tube 32 can be separated from the heating furnace 31, and another oxygen zirconium tube 32 can be inserted into the heating furnace 31; then, the flow direction of the flue gas is switched through the reversing valve 22 of the gas flow path system 2 to make the flue gas enter the newly used oxygen zirconium tube 32, and the oxygen content in the flue gas can continue to be measured.

[0069] After the temperature of the oxygen zirconium tube 32 that has left the heating furnace 31 drops, the maintenance personnel can separate the two heat insulation sub-covers 91 by removing the locking fastener 93, and the oxygen zirconium tube 32 inside can be conveniently disassembled and purged; during the cooling waiting process of the oxygen zirconium tube 32, another oxygen zirconium tube 32 still continues to measure the oxygen content of the flue gas, so that the analyzer can still monitor the oxygen content of the flue gas on the production equipment in real time, which can greatly reduce the time consumed for maintenance operations of the analyzer and improve the production efficiency of the production line.

[0070] The above is the preferred embodiment of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A zirconia analyzer, characterized in that: It includes a main instrument body (1), a gas flow path system (2) for inputting flue gas, an oxygen content detector (3) for measuring the oxygen content of the flue gas, and a signal conversion system (4) for displaying the oxygen content value; wherein, the oxygen content detector (3) includes a heating furnace (31) and two zirconia tubes (32), the heating furnace (31) is fixed inside the main instrument body (1), and movable openings (311) are respectively provided at both ends of the heating furnace (31). A sliding base (34) is slidably installed inside the main instrument body (1), the sliding direction of the sliding base (34) is set in the same direction as the axial direction of the heating furnace (31), the two zirconia tubes (32) are jointly fixed to the sliding base (34), and the two zirconia tubes (32) are respectively located on two opposite sides of the heating furnace (31), and each zirconia tube (32) is directly opposite to the adjacent movable opening (311). The sliding base (34) is connected with a driving mechanism (5) for driving the sliding base (34) to move, so as to force the two zirconia tubes (32) to alternately enter the adjacent movable openings (311); a sealing mechanism (6) is provided between the two zirconia tubes (32) for keeping the heating furnace (31) always in a sealed state when the zirconia tubes (32) leave the heating furnace (31). The driving mechanism (5) includes a threaded rod (51) and a rotating motor (52), the threaded rod (51) passes through the sliding base (34) and is threadedly connected with the sliding base (34), and both ends of the threaded rod (51) are respectively rotatably mounted inside the main instrument body (1); the rotating motor (52) is fixedly arranged, and the output end of the rotating motor (52) is connected to the threaded rod (51) for driving the threaded rod (51) to rotate. The sealing mechanism (6) includes a support baffle (61) and two groups of movable units respectively arranged on both side surfaces of the support baffle (61), and first sealing gaskets are fixed on both side surfaces of the support baffle (61); each zirconia tube (32) is connected to the end of the movable unit far away from the support baffle (61), and when the support baffle (61) abuts against the inner end wall of the heating furnace (31), the zirconia tube (32) drives the movable unit to unfold, so that the zirconia tube (32) completely leaves the heating furnace (31).

2. The zirconia analyzer according to claim 1, characterized in that: One end of the zirconia tube (32) is fixed with a connecting support (33), and the connecting support (33) and the sliding base (34) are detachably fixed by fasteners; an air inlet channel (331) and an air outlet channel (332) are arranged on the side surface of the connecting support (33), and the gas flow path system (2) is respectively connected with the air inlet channel (331) and the air outlet channel (332); a gas flow channel (321) is arranged inside the zirconia tube (32), and two ends of the gas flow channel (321) are respectively communicated with the air inlet channel (331) and the air outlet channel (332), and a part of the gas flow channel (321) extends to one end of the zirconia tube (32) far from the connecting support (33).

3. The zirconia analyzer according to claim 2, characterized in that: The movable unit includes a plurality of movable components (62) arranged around the central axis of the support baffle (61); each movable component (62) includes an elastic member (622) and two hinged plates (621) hinged to each other, one of the hinged plates (621) is hinged to the support baffle (61), and the other hinged plate (621) is hinged to the zirconia tube (32); the elastic member (622) is connected between the two hinged plates (621) and is used for forcing the two hinged plates (621) to rotate towards each other under normal conditions.

4. The zirconia analyzer according to claim 3, characterized in that: The outer diameter of the support baffle (61) matches the inner diameter of the heating furnace (31); a plurality of through structure grooves (611) are arranged on the side surface of the support baffle (61), and the projection area of each structure groove (611) to the side end surface of the heating furnace (31) is arranged in a staggered manner with the movable opening (311).

5. The zirconia analyzer according to claim 3, wherein: The number of the movable components (62) in one group of the movable units is set to two, and the hinge shafts of the two hinged plates (621) in each movable component (62) are arranged vertically; two groups of limiting mechanisms (7) are further arranged inside the instrument main body (1), and the two groups of limiting mechanisms (7) are respectively located on two opposite sides of the heating furnace (31); when the zirconia tube (32) moves to the outside of the heating furnace (31), the movable component (62) close to the zirconia tube (32) is located outside the limiting mechanism (7), and the unfolding state of the movable component (62) is fixed by controlling the action of the limiting mechanism (7).

6. The zirconia analyzer according to claim 5, wherein: The limiting mechanism (7) includes a first telescopic component (71) fixed inside the instrument main body (1) and a limiting insertion post (72) connected to the movable end of the first telescopic component (71), and the movable end of the first telescopic component (71) is in a retracted state under normal conditions. When the first telescopic component (71) acts, the limiting insertion post (72) is inserted into the inner sides of the hinged plates (621) of the adjacent movable units in a matching manner.

7. The zirconia analyzer according to claim 1, characterized in that: Inside the main instrument body (1), there are two heat insulation covers (9). The two heat insulation covers (9) are respectively arranged on two opposite sides of the heating furnace (31), and each heat insulation cover (9) covers the adjacent zirconia tube (32). At the top of the heat insulation cover (9), a heat dissipation tube (92) is integrally formed. At the top of the main instrument body (1), there is a heat dissipation port (11) connected to the heat dissipation tube (92).

8. The zirconia analyzer according to claim 7, characterized in that: The heat insulation cover (9) includes two symmetrically arranged heat insulation sub - covers (91). The bottom end of each heat insulation sub - cover (91) is hinged to the main instrument body (1). The two adjacent heat insulation sub - covers (91) are fixedly connected by a locking member (93).

9. The zirconia analyzer according to claim 1, characterized in that: On the side end face of the heating furnace (31), there is a clamping mechanism (8). The clamping mechanism (8) includes a rotating ring (81), a movable block (82), and a second telescopic member (83). The rotating ring (81) is rotatably connected to the heating furnace (31), and the rotating ring (81) is coaxially arranged around the periphery of the movable port (311). The second telescopic member (83) is rotatably connected to the heating furnace (31), and the movable end of the second telescopic member (83) is hinged to the outer side wall of the rotating ring (81). On the inner peripheral wall of the rotating ring (81), there are a plurality of inner convex parts (811). All the inner convex parts (811) are equidistantly arranged around the central axis of the rotating ring (81). The number of movable blocks (82) is plural. All the movable blocks (82) are jointly arranged inside the rotating ring (81), and each movable block (82) is slidably connected to the heating furnace (31). The sliding direction of the movable block (82) coincides with the radial direction of the rotating ring (81). On the side of the movable block (82) away from the rotating ring (81), there is a second sealing rubber pad (821). When the second telescopic member (83) drives the rotating ring (81) to rotate, the inner convex part (811) abuts against the movable block (82) and forces the movable block (82) to move inward, so as to force the second sealing rubber pad (821) to abut against the outer peripheral side of the zirconia tube (32).

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