A zirconium oxide probe sheath tube assembly

Abstract

The utility model relates to zirconium oxide probe technical field, concretely relates to a kind of zirconium oxide probe sheath tube assembly, including zirconium oxide probe body, the outside of zirconium oxide probe body is sheathed with sheath tube, the front end of sheath tube is equipped with opening, the circumference of opening is the circumference of half sheath tube, the detection end of zirconium oxide probe body is stretched to the sheath tube inside in opening position, flange is welded and fixed on the end portion position of zirconium oxide probe body far from detection end, fixed ring plate is welded and fixed on the rear end of sheath tube towards flange. The utility model is set to the zirconium oxide probe body in the flue by sheath tube, probe detection end is above the opening of sheath tube, and flue gas is first impacted on the sheath tube below opening, then naturally diffuses into opening and contacts detection end, detection end is not directly impacted by flue gas, and the corrosive gas of contact also reduces, to reduce the corrosion speed of probe in flue, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of zirconia probe technology, and specifically to a zirconia probe sheath assembly. Background Technology

[0002] A zirconia probe is a sensor based on the electrochemical properties of zirconia materials, primarily used for measuring oxygen concentration in gases at high temperatures. In high-temperature environments (typically above 650°C), if different oxygen concentrations exist in the gas on either side of the zirconia ceramic, oxygen molecules on the higher concentration side will combine with electrons on the platinum electrode to form oxygen ions (O₂). 2- Oxygen ions migrate to the low-concentration side through oxygen ion vacancies in the zirconia ceramic, where they release electrons and revert to oxygen molecules. During this process, a certain electromotive force, the oxygen potential, is generated between the two platinum electrodes, thus enabling the measurement of oxygen concentration.

[0003] In solid waste and sludge incineration power generation, the emissions after combustion are different from those of general coal-fired power generation. The flue gas contains a large amount of corrosive gases. The combination of corrosive gases, high temperature and direct impact of flue gas causes the zirconium oxide probe in the tail flue to malfunction frequently due to severe corrosion. Utility Model Content

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution: A zirconia probe sheath assembly includes a zirconia probe body, a sheath sleeve covering the outer side of the zirconia probe body, an opening at the front end of the sheath sleeve with a circumference of half the circumference of the sheath sleeve, a detection end of the zirconia probe body extending into the sheath sleeve at the opening, a flange welded and fixed to the zirconia probe body near the end away from the detection end, and a fixing ring plate welded and fixed to the sheath sleeve towards the rear end of the flange.

[0005] Furthermore, a fixing sleeve is welded and fixed on the sheath tube on the front side of the fixing ring plate, and an annular limiting groove is preset in the middle of the outer side of the fixing sleeve, and a movable ring plate is rotatably sleeved in the limiting groove.

[0006] Furthermore, the movable ring plate is provided with multiple staggered fixing holes and threaded sleeves, the fixing ring plate is provided with holes at the corresponding threaded sleeve port positions, and multiple studs are welded and fixed on the side of the fixing ring plate facing the flange.

[0007] Furthermore, two semi-circular sealing sleeves forming a circle are installed between the inner side of the sheath tube on the rear side of the opening and the zirconia probe body. The sealing sleeves are fitted onto the zirconia probe body, and the outer side of the sealing sleeves abuts against the inner side of the sheath tube.

[0008] Furthermore, a groove is pre-set in the middle of the outer side of the sealing sleeve, and a semi-circular friction ring is sleeved in the groove. One end of each of the two friction rings is connected to a pin, and both friction rings are sleeved and connected to the pin.

[0009] Furthermore, the friction rings are all integrally formed with protruding teeth at the ends away from the pin shaft. The protruding teeth are inclined at 45°. A buckle plate is installed between the ends of the two friction rings. Buckle tongues are integrally formed and fixed on both ends of the buckle plate facing the bottom of the friction rings. The buckle tongues are engaged and fixed with the protruding teeth.

[0010] Furthermore, a fixing plate is welded and fixed on the sheath tubes on the front and rear sides of the top of the opening, and multiple strip plates with equal spacing are welded and fixed between the left and right sides of the front and rear fixing plates. An air intake channel is formed between adjacent strip plates, and an air inlet channel is formed between the fixing plate and the top strip plate.

[0011] Furthermore, the strip plate is inclined upwards at an angle of 75°-80°.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model provides direct protection for the non-detection end of the probe rod by setting a protective sleeve for the zirconia probe body in the flue, avoiding direct corrosion by flue gas. The detection end of the probe has an opening at the top of the protective sleeve, so that the flue gas first impacts the protective sleeve below the opening, and then naturally diffuses into the opening to contact the detection end. The detection end is not directly impacted by the flue gas, and the contact with corrosive gases is also reduced, thereby reducing the corrosion rate of the probe in the flue and extending its service life.

[0013] 2. In this utility model, a fixed ring plate and a movable ring plate are used to install the protective sleeve. The protective sleeve can be rotated when needed to orient the opening so that the flue gas impact blows out the flue gas particles that have settled in the opening, thereby achieving a cleaning effect.

[0014] 3. In this utility model, a sealing sleeve is set inside the protective sleeve on the rear side of the opening to prevent flue gas from entering the probe rod position, thereby controlling the corrosive surface of the flue gas.

[0015] 4. In this utility model, a fixing plate and a strip plate are set at the top of the opening. The speed of the flue gas when it is discharged is used to draw the flue gas in the opening out under negative pressure. Then, air is introduced into the opening through the air inlet channel above, so that a stable flue gas flow is formed in the opening. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the sealing sleeve arrangement in this utility model; Figure 4 This is an enlarged view of point A in this utility model; Figure 5 This is a perspective view of the sealing sleeve in this utility model; Figure 6 This is a schematic diagram of the buckle plate arrangement in this utility model; Figure 7 This is a schematic diagram of the strip plate arrangement in this utility model.

[0017] Reference numerals in the attached diagram: 1. Sheath tube; 2. Opening; 3. Fixed ring plate; 4. Fixed sleeve; 5. Movable ring plate; 6. Limiting groove; 7. Threaded sleeve; 8. Fixing hole; 9. Stud; 10. Zirconia probe body; 11. Detection end; 12. Flange; 13. Sealing sleeve; 14. Friction ring; 15. Pin; 16. Buckle plate; 17. Raised tooth; 18. Buckle tongue; 19. Groove; 20. Fixed plate; 21. Strip plate; 22. Air intake channel; 23. Air inlet channel. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] This application provides a zirconia probe sheath assembly and offers the following technical solution, which will be discussed in conjunction with... Figures 1-7 Please provide a detailed explanation: A zirconia probe sheath assembly, such as Figures 1-4 As shown, the device includes a sheath tube 1 that is fitted over the outside of the zirconia probe body 10. The front end of the sheath tube 1 has an opening 2. The circumference of the opening 2 is half the circumference of the sheath tube 1. The detection end 11 of the zirconia probe body 10 extends into the sheath tube 1 at the position of the opening 2. A flange 12 is welded and fixed on the zirconia probe body 10 at the end position away from the detection end 11. A fixing ring plate 3 is welded and fixed on the sheath tube 1 facing the rear end of the flange 12. A fixing sleeve 4 is welded and fixed on the sheath tube 1 in front of the fixing ring plate 3. An annular limiting groove 6 is preset in the middle of the outer side of the fixing sleeve 4. A movable ring plate 5 is rotatably sleeved in the limiting groove 6.

[0020] When in use, insert the zirconia probe body 10 into the sheath tube 1, and then insert the sheath tube 1 containing the zirconia probe body 10 into the reserved detection port. When inserting, ensure that the opening 2 of the sheath tube 1 faces directly upward. After insertion, use bolts to fix the movable ring plate 5 to the reserved bolt hole of the detection port. Then use bolts to install and fix the fixed ring plate 3 to the movable ring plate 5. Finally, use bolts to install and fix the flange 12 of the zirconia probe body 10 to the fixed ring plate 3. At this point, the zirconia probe body 10 can be used. During operation, the flue gas from the combustion furnace enters the flue and is then discharged upwards along the emission path. The flue gas first acts on the protective sleeve 1 below the detection end 11. Blocked by the protective sleeve 1, the flue gas cannot directly impact the detection end 11. As the flue gas diffuses within the flue, it naturally enters the detection end 11 through the opening 2. At this point, the detection end 11 can normally detect the oxygen concentration in the flue gas. The protective sleeve 1 provides some protection to the detection end 11, allowing the flue gas to diffuse naturally within the flue before contacting the detection end 11 through the opening 2. This reduces the flue gas velocity, thus avoiding direct contact with rapidly discharged, high-temperature flue gas. With less impact from the flow rate on the zirconia probe body 10, the zirconia probe body 10 is only subjected to high temperature and corrosion from some corrosive gases in the flue gas within the flue. This reduces the types of corrosion damage to the zirconia probe body 10, slows down the corrosion rate of the zirconia probe body 10 within the flue, and extends its service life. At the same time, the flue gas needs to contact the detection end 11 through the opening 2 above. The corrosive gases that the detection end 11 comes into contact with are significantly reduced compared to direct contact with the flue gas, thereby slowing down the corrosion rate of the corrosive gases on the zirconia probe body 10 and further extending the service life of the zirconia probe body 10. Since opening 2 is located at the top, some particles in the flue gas will fall into the sheath tube 1 through opening 2 and then adhere to the detection end 11. Over time, this will adversely affect the data detected by the detection end 11. After a certain period of use or when the detection end 11 malfunctions, first loosen the bolts between the fixed ring plate 3 and the movable ring plate 5. At this time, the fixed relationship between the fixed ring plate 3 and the movable ring plate 5 is released, while the movable ring plate 5 is fixed to the flue. The sheath tube 1 can be rotated. Rotate the sheath tube 1 90° so that the originally upward-facing opening 2 faces downward. At this time, the flue gas in the flue can directly enter the sheath tube 1 through the downward-facing opening 2. The flue gas flow rate is relatively fast at this time. The flue gas with a certain flow rate can impact the sheath tube 1 and the detection end 11 in the opening 2, blowing out the particles in the flue gas that have settled inside, so as to achieve a cleaning effect. After cleaning, rotate the sheath tube 1 back to its original position and then fix the fixed ring plate 3 and the movable ring plate 5.

[0021] like Figure 4 As shown, the movable ring plate 5 has multiple staggered fixing holes 8 and threaded sleeves 7. The fixing ring plate 3 has holes at the corresponding positions of the threaded sleeves 7. Multiple studs 9 are welded and fixed on the side of the fixing ring plate 3 facing the flange 12.

[0022] When fixing the movable ring plate 5, first use bolts to pass through the fixing hole 8 and connect them to the bolt holes outside the reserved inspection port of the flue to fix the movable ring plate 5. Then use bolts to pass through the opening on the fixed ring plate 3 and screw them into the threaded sleeve 7. At this time, the fixed ring plate 3 and the movable ring plate 5 can be fixed. At this time, the protective sleeve 1 is restricted from rotating. When installing the flange 12, align the hole with the stud 9, then fit the flange 12 with the fixed ring plate 3, and then screw the nut on the stud 9 and tighten it against the flange 12 to fix it.

[0023] like Figure 3 and Figure 5 As shown, two semi-circular sealing sleeves 13, which form a circle, are installed between the inner side of the sheath tube 1 behind the opening 2 and the zirconia probe body 10. The sealing sleeves 13 are fitted onto the zirconia probe body 10, and the outer side of the sealing sleeves 13 abuts against the inner side of the sheath tube 1.

[0024] The front side of opening 2 belongs to the space of detection end 11 and needs to be connected to the external space, while the rear side is the rod area of ​​zirconia probe body 10, which does not need to be connected to the environment. Moreover, if it is connected to the flue, corrosive gases in the flue gas will enter the interior and corrode the sheath tube 1 and the rod of zirconia probe body 10. Therefore, a sealing sleeve 13 is set. When in use, after the zirconia probe body 10 is inserted into the sheath tube 1, the two sealing sleeves 13 are put on the zirconia probe body 10 on the rear side of detection end 11, and then the sealing sleeves 13 are pushed into the sheath tube 1 on the rear side of opening 2, thereby blocking the gap between the sheath tube 1 on the rear side of opening 2 and the zirconia probe body 10 and preventing flue gas from entering.

[0025] like Figure 5 and Figure 6 As shown, a groove 19 is pre-set in the middle of the outer side of the sealing sleeve 13. A semi-circular friction ring 14 is fitted inside the groove 19. A pin 15 passes through one end of each of the two friction rings 14, and both friction rings 14 are sleeved and connected to the pin 15.

[0026] Before installing the sealing sleeve 13, first put the friction ring 14 into the groove 19 of the sealing sleeve 13, then put the friction ring 14 and the sealing sleeve 13 together onto the zirconium oxide probe body 10 on the back side of the opening 2, and finally insert it into the sheath tube 1 on the back side of the opening 2. The friction ring 14 increases the frictional resistance with the inner wall of the sheath tube 1, thereby improving the installation stability of the sealing sleeve 13 in the sheath tube 1 and preventing it from being pushed and moved in the flue due to the flue gas pressure.

[0027] like Figure 6As shown, the friction ring 14 has a protruding tooth 17 integrally formed and fixed at the end away from the pin 15. The protruding tooth 17 is inclined at 45°. A buckle plate 16 is installed between the ends of the two friction rings 14. Buckle tongues 18 are integrally formed and fixed at both ends of the buckle plate 16 facing the bottom of the friction ring 14. The buckle tongues 18 are engaged and fixed with the protruding tooth 17.

[0028] When the sealing sleeve 13 is placed on the zirconium oxide probe body 10 behind the opening 2, the buckle plate 16 is fastened on the two friction rings 14. After the buckle plate 16 is fastened, it pushes the friction rings 14 to both ends, causing them to open outward inside the sheath tube 1. This allows the friction rings 14 to obtain additional pressure against the inner wall of the sheath tube 1, further increasing the friction resistance and ensuring the stability of the sealing sleeve 13 inside the sheath tube 1.

[0029] like Figure 2 and Figure 7 As shown, a fixing plate 20 is welded and fixed on the sheath tube 1 on the front and rear sides of the top of the opening 2. Multiple strip plates 21 with equal spacing are welded and fixed between the left and right sides of the front and rear fixing plates 20. An air intake channel 22 is formed between adjacent strip plates 21, and an air inlet channel 23 is formed between the fixing plate 20 and the top strip plate 21.

[0030] The flue gas in the flue has a certain velocity when it is discharged. When the flue gas flows through the protective sleeve 1 around the opening 2, the air pressure in the direct flow path of the flue gas is lower than the air pressure in the non-direct flow path of the flue gas. At this time, the air pressure in the opening 2 is higher than the external air pressure. Based on the air pressure balance, the flue gas in the opening 2 is drawn out by the low pressure on the outside through the air intake channel 22, while the flue gas above the fixed plate 20 is naturally replenished into the opening 2 through the air intake channel 23, forming a stable flue gas replacement, ensuring that the flue gas in the opening 2 is always in a flowing state, thereby ensuring the accuracy of the detection results of the detection end 11.

[0031] like Figure 7 As shown, the strip plate 21 is inclined upwards at an angle of 75°-80°.

[0032] The flue gas flows upward, and the strip plate 21 is tilted upward, which means that the outer channel opening of the induced draft channel 22 is facing upward, which is basically consistent with the direction of flue gas flow. This reduces the amount of flue gas entering the opening 2 through the induced draft channel 22, ensuring that the induced draft channel 22 is in a stable state of air outlet, while the air inlet channel 23 is in the state of air inlet.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A zirconia probe sheath assembly, comprising a zirconia probe body (10), characterized in that, The outer side of the zirconia probe body (10) is covered with a sheath tube (1). The front end of the sheath tube (1) has an opening (2). The circumference of the opening (2) is half the circumference of the sheath tube (1). The detection end (11) of the zirconia probe body (10) extends into the sheath tube (1) at the opening (2). A flange (12) is welded and fixed on the zirconia probe body (10) at a position close to the end away from the detection end (11). A fixing ring plate (3) is welded and fixed on the sheath tube (1) towards the rear end of the flange (12).

2. The zirconia probe sheath assembly according to claim 1, characterized in that, A fixed sleeve (4) is welded and fixed on the sheath tube (1) on the front side of the fixed ring plate (3). An annular limiting groove (6) is preset in the middle of the outer side of the fixed sleeve (4). A movable ring plate (5) is rotatably sleeved in the limiting groove (6).

3. The zirconia probe sheath assembly according to claim 2, characterized in that, The movable ring plate (5) has multiple staggered fixing holes (8) and threaded sleeves (7). The fixing ring plate (3) has holes at the corresponding positions of the threaded sleeves (7). Multiple studs (9) are welded and fixed on the side of the fixing ring plate (3) facing the flange (12).

4. The zirconia probe sheath assembly according to claim 1, characterized in that, Two semi-circular sealing sleeves (13) are installed between the inner side of the sheath tube (1) behind the opening (2) and the zirconia probe body (10). The sealing sleeves (13) are fitted on the zirconia probe body (10), and the outer side of the sealing sleeves (13) abuts against the inner side of the sheath tube (1).

5. A zirconia probe sheath assembly according to claim 4, characterized in that, The outer side of the sealing sleeve (13) has a groove (19) in the middle. A semi-circular friction ring (14) is fitted inside the groove (19). One end of the two friction rings (14) is connected to a pin (15). Both friction rings (14) are sleeved and connected to the pin (15).

6. A zirconia probe sheath assembly according to claim 5, characterized in that, The friction ring (14) has a protruding tooth (17) integrally formed and fixed at the end away from the pin (15). The protruding tooth (17) is set at a 45° angle. A buckle plate (16) is installed between the ends of the two friction rings (14). Buckle tongues (18) are integrally formed and fixed at both ends of the buckle plate (16) facing the bottom of the friction ring (14). The buckle tongues (18) are engaged and fixed with the protruding tooth (17).

7. A zirconia probe sheath assembly according to claim 1, characterized in that, Fixing plates (20) are welded and fixed on the sheaths (1) on the front and rear sides of the top of the opening (2). Multiple strip plates (21) with equal spacing are welded and fixed between the left and right sides of the front and rear fixing plates (20). An air intake channel (22) is formed between adjacent strip plates (21), and an air inlet channel (23) is formed between the fixing plate (20) and the top strip plate (21).

8. A zirconia probe sheath assembly according to claim 7, characterized in that, The strip plate (21) is inclined upward at an angle of 75°-80°.

Images