A device for measuring the temperature of a solution in a reactor

Abstract

The present invention provides a device for measuring the temperature of a solution in a reactor, and relates to the technical field of temperature measurement. The device comprises a preheating mechanism, a supporting mechanism and a measuring component. A slot is provided on the side of the preheating mechanism, and the supporting mechanism is embedded in the slot. The supporting mechanism and the preheating mechanism are both annular structures as a whole, and a first convex plate and a second convex plate are respectively integrally formed at both ends of the supporting mechanism, and a first lower hanging rod is welded to the bottom of the first convex plate and the second convex plate. The present invention floats on the surface area of ​​the solution inside the reactor through the supporting mechanism and the preheating mechanism, and cooperates with the measuring component at the bottom to measure the current temperature of the solution at a fixed depth and position, so as to avoid the measurement point parameters being affected by the drop of the liquid level or the narrowing of the inner wall of the reactor, and at the same time, the temperature of the solution continuously injected subsequently can be preheated and measured in a targeted manner, so as to reduce the temperature interference to the main part of the internal reaction solution.

Description

Technical Field

[0001] The invention relates to the technical field of temperature measurement, in particular to a device for measuring the temperature of a solution in a reaction kettle. Background Art

[0002] Veratrone is stable at room temperature and pressure. It is a colorless liquid or white crystal. It is soluble in ethers, alcohols and organic solvents, but it is easily decomposed in sunlight. Veratrone is mainly used in the medical field and is an important intermediate for the antihypertensive drug methyldopa. Methyldopa is used to treat moderate, severe or malignant hypertension, especially gestational hypertension, renal hypertension and hypertensive emergencies. Veratrone is mainly obtained by condensation, reduction and hydrolysis of veratraldehyde (3,4-dimethoxybenzaldehyde). Reactor equipment is required in the entire preparation process, and the temperature is controlled within the required range to complete the above reaction process.

[0003] The temperature measuring device of the solution in the reactor used in the prior art can directly measure the internal solution temperature by embedding the temperature sensing probe on the inner wall of the reactor. However, since the heating structure inside the reactor is installed at the bottom or inner wall area, the current temperature of the solution at different depths and positions is also different. Conventional temperature measuring devices are difficult to provide continuous and effective measurement for points with a fixed depth and a fixed distance from the inner wall of the reactor. Therefore, the temperature measurement data cannot balance the actual temperature of the overall reaction solution. On the other hand, during the preparation process in the Veratrum ketone reactor, raw materials need to be frequently replenished, and the temperature of the raw materials or water injected subsequently is greatly different from the current temperature inside the reactor, which makes the temperature more prone to stratification problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device for measuring the temperature of a solution in a reactor to solve the problems raised in the above-mentioned background technology. The present invention floats on the surface area of ​​the solution inside the reactor through a supporting mechanism and a preheating mechanism, and cooperates with the measuring component at the bottom to measure the current temperature of the solution at a fixed depth and position, thereby avoiding the influence of the measurement point parameters due to the drop in liquid level or the narrowing of the inner wall of the reactor. At the same time, it can also preheat and measure the temperature of the solution that is continuously injected subsequently, reduce the temperature interference to the main part of the internal reaction solution, and also avoid the problem of a large amount of material adhering to the surface of the preheating mechanism.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a device for measuring the temperature of a solution in a reactor, comprising a temperature measuring device body, the temperature measuring device body comprising a preheating mechanism, a supporting mechanism and a measuring assembly, a slot is provided on the side of the preheating mechanism, the supporting mechanism is embedded in the interior of the slot, the supporting mechanism and the preheating mechanism are both annular structures as a whole, the two ends of the supporting mechanism are respectively integrally formed with a first convex plate and a second convex plate, and the bottoms of the first convex plate and the second convex plate are both welded with a first lower hanging rod, the surface of the first lower hanging rod is installed with a measuring assembly, the surfaces of the first convex plate and the second convex plate are provided with a docking hole, and the docking hole on the surface of the first convex plate is inserted with a driving assembly, the docking hole on the surface of the second convex plate is inserted with a feeding assembly, and the tops of the feeding assembly and the driving assembly both pass out from the top of the reactor to be measured, the bottom of the preheating mechanism is welded with a second lower hanging rod, and the side of the second lower hanging rod is welded with a stirring plate.

[0006] Furthermore, the preheating mechanism includes a preheating box and a gear ring, the slot is opened in the middle area of ​​the outer side of the preheating box, the gear ring is integrally formed on the inner wall of the slot, and balls are embedded in the top and bottom of the slot, and a second guide pipe is opened at the bottom of the preheating box.

[0007] Furthermore, a heating cavity is provided inside the preheating box, an electric heating ring is embedded on the inner wall of the heating cavity, a feeding port is provided on the top of the heating cavity, and the interior of the heating cavity is connected to the top of the second guide pipe.

[0008] Furthermore, the feed port and the second guide pipe are both annular structures as a whole, and the feed port is opened in the area near the inner circle at the top of the preheating box, the second guide pipe is connected to the area near the outer circle at the bottom of the preheating box, and the second lower hanging rod and the stirring plate are evenly distributed around the central axis of the preheating box.

[0009] Furthermore, the supporting mechanism includes a first convex plate, a second convex plate and a retaining ring, a driving interlayer is opened inside the first convex plate, the measuring assembly includes a first temperature measuring probe and a second temperature measuring probe, a telescopic sleeve is welded on the surface of the first lower hanging rod, a telescopic rod is inserted into the interior of the telescopic sleeve, and a spring is sleeved on the surface of the telescopic rod.

[0010] Furthermore, an end plate is integrally formed at one end of the telescopic rod, a universal ball is embedded on the outer side of the end plate, the first temperature measuring probe and the second temperature measuring probe are both installed at the other end of the corresponding telescopic rod, and the second temperature measuring probe is arranged in the area below the first temperature measuring probe.

[0011] Furthermore, the surface of the first temperature measuring probe is aligned with the end opening area of ​​the second flow guide pipe, the stirring plate is located above the second temperature measuring probe, the telescopic rod is pressed against the inner wall of the reactor to be tested through a universal ball, and the two ends of the spring are respectively pressed against the surfaces of the telescopic sleeve and the end plate.

[0012] Furthermore, the driving assembly includes a motor, a driving sleeve and a driving shaft, the driving shaft is inserted into the interior from the bottom of the driving sleeve, the top of the driving sleeve is fixedly connected to the output end of the motor, and the end of the driving shaft is integrally formed with a gear.

[0013] Furthermore, a notch is provided on one side of the driving interlayer close to the retaining ring, and the edge of the gear passes through the inside of the notch toward the inside of the retaining ring, and the gear is meshed with the gear ring portion.

[0014] Furthermore, the feeding assembly includes a fixed sleeve and a lifting pipe, the lifting pipe penetrates upward from the bottom of the fixed sleeve into the interior, and a feeding port is provided at the top of the fixed sleeve, the surfaces of the lifting pipe and the driving shaft are integrally formed with convex strips, the inner walls of the driving sleeve and the fixed sleeve are provided with groove structures for embedding the convex strips, the top of the fixed sleeve is welded to the top of the inner wall of the reactor to be tested, and a first guide pipe is provided on one side of the bottom of the lifting pipe.

[0015] Beneficial effects of the present invention:

[0016] 1. The device for measuring the temperature of the solution in the reactor floats on the surface area of ​​the solution inside the reactor through a supporting mechanism and a preheating mechanism. It can measure the current temperature of the solution at a fixed depth and position in conjunction with the measuring component at the bottom, thereby preventing the measurement point parameters from being affected by the drop in liquid level or the narrowing of the inner wall of the reactor. At the same time, the preheating mechanism can be controlled to rotate continuously in conjunction with the driving component, so that the solution measured in the second temperature measuring probe area can remain in a flowing state, making the temperature measurement result of the internal solution more reliable and effective.

[0017] 2. The device for measuring the temperature of the solution in the reactor directly introduces the newly injected water or raw materials into the interior of the preheating mechanism through the feeding component, thereby preheating the temperature of the subsequently continuously injected solution and performing targeted temperature measurement processing, and flexibly adjusting the internal temperature of the reactor and the preheating temperature inside the preheating mechanism according to the preheated solution temperature, thereby reducing the temperature interference on the main part of the internal reaction solution.

[0018] 3. In the process of introducing the newly injected water or raw materials directly into the interior of the preheating mechanism through the feeding component, the device for measuring the temperature of the solution in the reactor allows the water or solution to flow along the surface area of ​​the preheating mechanism in the form of flushing, which can avoid the problem of a large amount of material adhering to the surface of the preheating mechanism, and is also convenient for the targeted flushing and cleaning process of the surface area of ​​the measuring device directly from the outside after the measurement is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a device for measuring the temperature of a solution in a reaction kettle according to the present invention;

[0020] Figure 2 A side cross-sectional view of a device for measuring the temperature of a solution in a reaction kettle according to the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of the middle right region;

[0022] Figure 4 It is a schematic diagram of the structure of the measuring component part of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the supporting mechanism part of the present invention;

[0024] Figure 6 It is a side sectional view of the preheating mechanism part of the present invention;

[0025] Figure 7 for Figure 1 A magnified image of area A;

[0026] In the figure: 1. preheating mechanism; 2. supporting mechanism; 3. driving assembly; 4. feeding assembly; 5. measuring assembly; 6. first convex plate; 7. driving interlayer; 8. gear; 9. first lower hanging rod; 10. telescopic sleeve; 11. telescopic rod; 12. end plate; 13. universal ball; 14. first temperature measuring probe; 15. second temperature measuring probe; 16. preheating box; 17. second lower hanging rod; 18. stirring plate; 19. docking hole; 20. motor; 21. driving sleeve; 22. driving shaft; 23. spring; 24. notch; 25. second convex plate; 26. feeding port; 27. fixed sleeve; 28. lifting pipe; 29. ​​convex strip; 30. first guide pipe; 31. snap ring; 32. slot; 33. gear ring; 34. ball; 35. heating cavity; 36. annular mouth; 37. electric heating ring; 38. second guide pipe. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7 The present invention provides the following technical solutions: a device for measuring the temperature of a solution in a reactor, comprising a temperature measuring device body, the temperature measuring device body comprising a preheating mechanism 1, a supporting mechanism 2 and a measuring assembly 5, a slot 32 is provided on the side of the preheating mechanism 1, the supporting mechanism 2 is embedded in the slot 32, the supporting mechanism 2 and the preheating mechanism 1 are both annular in structure, the two ends of the supporting mechanism 2 are respectively integrally formed with a first convex plate 6 and a second convex plate 25, and the bottoms of the first convex plate 6 and the second convex plate 25 are welded with The first lower hanging rod 9, the surface of the first lower hanging rod 9 is installed with a measuring component 5, the surface of the first convex plate 6 and the second convex plate 25 are provided with a docking hole 19, and the docking hole 19 on the surface of the first convex plate 6 is inserted with a driving component 3, and the docking hole 19 on the surface of the second convex plate 25 is inserted with a feeding component 4, and the tops of the feeding component 4 and the driving component 3 are both inserted outward from the top of the reactor to be tested, and the bottom of the preheating mechanism 1 is welded with a second lower hanging rod 17, and the side of the second lower hanging rod 17 is welded with a stirring plate 18. The temperature measuring device for the solution in the reactor is used to continuously detect the temperature of the point at a fixed depth of the solution in the reactor and a fixed distance from the inner wall of the reactor.

[0029] When the present invention is used, the entire device is placed inside the reactor and floats on the surface of the solution through the support mechanism 2 and the preheating mechanism 1. The temperature of the solution in the fixed depth area below the liquid surface is measured by the measuring component 5 at the bottom. At the same time, the measuring component 5 is pressed against the inner wall of the reactor, so that after the liquid level rises or falls, the temperature of the solution part in the fixed interval area of ​​the inner wall of the reactor can always be measured. In the whole reaction process, the driving effect of the preheating mechanism 1 is realized through the driving component 3 at the top, so that when the measuring component 5 measures the temperature of the solution that has been injected into the interior, the solution at the measuring point is in a stirring state to expand the temperature measurement range. At the same time, in the subsequent reaction process, the newly injected solution part is injected into the reactor along the feeding component 4, and the newly injected water or raw material is preheated by the preheating mechanism 1. After heating, it is discharged toward the bottom of the solution part, and the solution area after discharge is subjected to targeted additional temperature measurement, and the temperature heating intensity inside the preheating mechanism 1 is regulated according to the measured temperature to ensure that the temperature of the newly injected raw material is close to that of the solution already accumulated in the reactor.

[0030] In this embodiment, the preheating mechanism 1 includes a preheating box 16 and a gear ring 33. The slot 32 is opened in the middle area of ​​the outer side of the preheating box 16. The gear ring 33 is integrally formed on the inner wall of the slot 32, and the top and bottom of the slot 32 are embedded with balls 34. The bottom of the preheating box 16 is provided with a second guide pipe 38. A heating cavity 35 is opened inside the preheating box 16, and an electric heating ring 37 is embedded on the inner wall of the heating cavity 35. A feeding port 26 is opened at the top of the heating cavity 35, and the interior of the heating cavity 35 is connected to the top of the second guide pipe 38. The feeding port 26 and the second guide pipe 38 are both annular structures as a whole, and the feeding port 26 is opened in the area near the inner ring of the top of the preheating box 16. The second guide pipe 38 is connected to the area near the outer ring of the bottom of the preheating box 16. The second lower hanging rod 17 and the stirring plate 18 are evenly distributed around the central axis of the preheating box 16. The newly injected water or raw material is directly introduced into the preheating mechanism 1 through the feeding component 4, so as to preheat the temperature of the solution continuously injected subsequently and perform targeted temperature measurement processing, and flexibly adjust the internal temperature of the reactor and the preheating temperature inside the preheating mechanism 1 according to the preheated solution temperature, thereby reducing the temperature interference caused to the main part of the internal reaction solution.

[0031] Specifically, the subsequent raw material portion is directly transported to the interior of the preheating mechanism 1 through the feeding component 4. In this process, after the supplementary raw material flows out from the end of the first guide pipe 30, it can flow toward the inside of the annular opening 36 at the top of the preheating box 16, and then flow into the interior of the heating cavity 35 from the annular opening 36. The part of the supplementary raw material is preheated in the heating cavity 35 with the help of the electric heating ring 37, and finally flows out from the second guide pipe 38 at the bottom to the bottom area of ​​the reactor. In the above process, the entire preheating mechanism 1 will be controlled to be in a rotating state by the driving component 3. The rotation process can directly rinse the top of the preheating box 16 with the help of the injected water or raw material to avoid the material from adhering to the top of the preheating box 16 for a long time. The preheated solution portion flowing out from the second guide pipe 38 is close to the first temperature measuring probe 14 area of ​​the detection component, and the temperature of this part of the area is measured according to the first temperature measuring probe 14, and the preheating temperature of the supplementary raw material portion is controlled by changing the power of the electric heating ring 37.

[0032] In this embodiment, the support mechanism 2 includes a first convex plate 6, a second convex plate 25 and a clamping ring 31. The first convex plate 6 is provided with a driving interlayer 7. The measuring assembly 5 includes a first temperature measuring probe 14 and a second temperature measuring probe 15. A telescopic sleeve 10 is welded on the surface of the first lower hanging rod 9. A telescopic rod 11 is inserted into the interior of the telescopic sleeve 10. A spring 23 is sleeved on the surface of the telescopic rod 11. An end plate 12 is integrally formed at one end of the telescopic rod 11. A universal ball 13 is embedded on the outer side of the end plate 12. The first temperature measuring probe 14 and the second temperature measuring probe 15 are both installed at the other end of the corresponding telescopic rod 11, and the second temperature measuring probe 15 is arranged in the lower area of ​​the first temperature measuring probe 14. The surface of the first temperature probe 14 is aligned with the end opening area of ​​the second flow guide pipe 38, the stirring plate 18 is above the second temperature probe 15, the telescopic rod 11 is pressed against the inner wall of the reactor to be tested through the universal ball 13, and the two ends of the spring 23 are respectively pressed against the surface of the telescopic sleeve 10 and the end plate 12. The support mechanism 2 and the preheating mechanism 1 float on the surface area of ​​the solution inside the reactor, and the current temperature of the solution at a fixed depth and position can be measured in conjunction with the measuring component 5 at the bottom to avoid the influence of the measurement point parameters caused by the drop of the liquid level or the narrowing of the inner wall of the reactor. At the same time, the preheating mechanism 1 can be controlled to rotate continuously in conjunction with the driving component 3, so that the solution measured in the area of ​​the second temperature probe 15 can remain in a flowing state, making the temperature measurement result of the internal solution more reliable and effective.

[0033] Specifically, after the clamp ring 31 is embedded in the slot 32 on the outside of the preheating mechanism 1 and the driving component 3 on the top is started, the entire preheating mechanism 1 can be driven to rotate under the support effect of the supporting mechanism 2, and during the rotation, the first temperature sensing probe and the second temperature sensing probe at the bottom of the measuring component 5 are used to respectively detect the temperature of the supplementary raw material area derived from the preheating mechanism 1 and the temperature of the solution in the reaction process at the bottom of the reactor. Since the supporting mechanism 2 and the preheating mechanism 1 both float on the surface of the solution, the first temperature sensing probe and the second temperature sensing probe are both at a fixed liquid level and are pressed against the inner wall of the reactor through the universal ball 13. The first temperature sensing probe and the second temperature sensing probe at the end can be pressed against by the telescopic rod 11, ensuring that the temperature sensing probe can always be at a fixed distance from the inner wall of the reactor for temperature detection.

[0034] In this embodiment, the driving assembly 3 includes a motor 20, a driving sleeve 21 and a driving shaft 22. The driving shaft 22 is inserted into the driving sleeve 21 from the bottom, the top of the driving sleeve 21 is fixedly connected to the output end of the motor 20, and the end of the driving shaft 22 is integrally formed with a gear 8. A notch 24 is provided on one side of the driving interlayer 7 close to the snap ring 31, and the edge of the gear 8 passes through the notch 24 toward the inside of the snap ring 31, and the gear 8 is partially meshed with the gear ring 33. The feeding assembly 4 includes a fixed sleeve 27 and a lifting pipe 28, the lifting pipe 28 penetrates upward from the bottom of the fixed sleeve 27 to the inside, and a feeding port 26 is provided at the top of the fixed sleeve 27, the lifting pipe 28 and the surface of the driving shaft 22 are integrally formed with convex strips 29, the inner walls of the driving sleeve 21 and the fixed sleeve 27 are provided with groove structures for embedding the convex strips 29, the top of the fixed sleeve 27 is welded to the top of the inner wall of the reactor to be tested, and a first guide pipe 30 is provided at one side of the bottom of the lifting pipe 28. In the process of introducing the newly injected water or raw materials directly into the interior of the preheating mechanism 1 through the feeding assembly 4, the water or solution flows along the surface area of ​​the preheating mechanism 1 in the form of flushing, which can avoid the problem of a large amount of material adhering to the surface of the preheating mechanism 1, and also facilitate the targeted flushing and cleaning process of the surface area of ​​the measuring device directly from the outside after the measurement is completed later.

[0035] Specifically, by starting the motor 20 at the top, the rotatable driving sleeve 21 at the bottom can be driven to rotate, and the convex strip 29 can be used to drive the driving shaft 22 at the bottom to rotate. The driving shaft 22 is meshed with the gear ring 33 by means of the gear 8 at the end, so that the entire preheating mechanism 1 can be rotated, and then the second lower hanging rod 17 and the stirring plate 18 at the bottom of the preheating mechanism 1 are stirred in the top area of ​​the second temperature sensing probe, so as to achieve the homogenization of the solution in the measurement area of ​​the second temperature sensing probe, and the subsequent supplementary raw material part is injected into the interior of the fixed sleeve 27 through the feeding port 26, and the fixed sleeve then transports this part of the raw material to the interior of the lifting sleeve that can only perform telescopic movement, and finally flows out from the first guide pipe 30 at the bottom toward the top of the preheating mechanism 1, so as to achieve the rapid diffusion and preheating processing of the supplementary raw material part.

[0036] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for measuring the temperature of a solution in a reactor, comprising a temperature measuring device body, characterized in that: The temperature measuring device body comprises a preheating mechanism (1), a supporting mechanism (2) and a measuring assembly (5); a slot (32) is provided on the side of the preheating mechanism (1); the supporting mechanism (2) is embedded in the slot (32); the supporting mechanism (2) and the preheating mechanism (1) are both annular structures as a whole; a first convex plate (6) and a second convex plate (25) are integrally formed at both ends of the supporting mechanism (2); a first lower hanging rod (9) is welded to the bottom of the first convex plate (6) and the second convex plate (25); the measuring assembly (5) is installed on the surface of the first lower hanging rod (9); a docking hole (19) is provided on the surface of the first convex plate (6) and the second convex plate (25); and the surface of the first convex plate (6) is provided with a A driving component (3) is inserted into the docking hole (19), a feeding component (4) is inserted into the docking hole (19) on the surface of the second convex plate (25), and the tops of the feeding component (4) and the driving component (3) are both inserted outward from the top of the reactor to be tested, a second lower hanging rod (17) is welded to the bottom of the preheating mechanism (1), and a stirring plate (18) is welded to the side of the second lower hanging rod (17), the preheating mechanism (1) comprises a preheating box (16) and a gear ring (33), the slot (32) is opened in the middle area of ​​the outer side of the preheating box (16), the inner wall of the slot (32) is integrally formed with a gear ring (33), and the top and bottom of the slot (32) are both embedded with balls (34), the preheating box ( A second flow guide duct (38) is provided at the bottom of the support mechanism (2), the support mechanism (2) comprises a first convex plate (6), a second convex plate (25) and a clamping ring (31), a driving interlayer (7) is provided inside the first convex plate (6), the measuring assembly (5) comprises a first temperature measuring probe (14) and a second temperature measuring probe (15), a telescopic sleeve (10) is welded on the surface of the first lower hanging rod (9), a telescopic rod (11) is inserted into the interior of the telescopic sleeve (10), a spring (23) is sleeved on the surface of the telescopic rod (11), an end plate (12) is integrally formed at one end of the telescopic rod (11), a universal ball (13) is embedded on the outer side of the end plate (12), the first temperature measuring probe (14) and the second temperature measuring probe (15) are connected to the first lower hanging rod (9), and a telescopic sleeve (10) is welded on the surface of the first lower hanging rod (9), a telescopic rod (11) is inserted into the interior of the telescopic sleeve (10), a spring (23) is sleeved on the surface of the telescopic rod (11), an end plate (12) is integrally formed at one end of the telescopic rod (11), a universal ball (13) is embedded on the outer side of the end plate (12), and the first temperature measuring probe (14) and the second temperature measuring probe (15) are connected to the first lower hanging rod (9). The temperature measuring probes (15) are all mounted on the other end of the corresponding telescopic rod (11), and the second temperature measuring probe (15) is arranged in the lower area of ​​the first temperature measuring probe (14), the surface of the first temperature measuring probe (14) is aligned with the end opening area of ​​the second flow guide pipe (38), the stirring plate (18) is located above the second temperature measuring probe (15), the telescopic rod (11) is pressed against the inner wall of the reactor to be tested through the universal ball (13), the two ends of the spring (23) are pressed against the surfaces of the telescopic sleeve (10) and the end plate (12), respectively, the driving assembly (3) comprises a motor (20), a driving sleeve (21) and a driving shaft (22), the driving shaft (22) is inserted into the interior from the bottom of the driving sleeve (21),The top of the driving sleeve (21) is fixedly connected to the output end of the motor (20), the end of the driving shaft (22) is integrally formed with a gear (8), a notch (24) is provided on the side of the driving interlayer (7) close to the retaining ring (31), the edge of the gear (8) passes through the inside of the notch (24) toward the inside of the retaining ring (31), and the gear (8) is partially meshed with the gear ring (33).

2. A device for measuring the temperature of a solution in a reactor according to claim 1, characterized in that: A heating cavity (35) is provided inside the preheating box (16), an electric heating ring (37) is embedded on the inner wall of the heating cavity (35), a feeding port (26) is provided at the top of the heating cavity (35), and the interior of the heating cavity (35) is connected to the top of the second guide pipe (38).

3. A device for measuring the temperature of a solution in a reactor according to claim 2, characterized in that: The feeding port (26) and the second flow guide pipe (38) are both annular in structure as a whole, and the feeding port (26) is opened in an area near the inner circle of the top of the preheating box (16), the second flow guide pipe (38) is connected to an area near the outer circle of the bottom of the preheating box (16), and the second lower hanging rod (17) and the stirring plate (18) are evenly distributed around the central axis of the preheating box (16).

4. The device for measuring the temperature of a solution in a reactor according to claim 1, characterized in that: The feeding assembly (4) comprises a fixed sleeve (27) and a lifting pipe (28), wherein the lifting pipe (28) penetrates upward from the bottom of the fixed sleeve (27) into the interior, and a feeding port (26) is provided at the top of the fixed sleeve (27), a convex strip (29) is integrally formed on the surface of the lifting pipe (28) and the driving shaft (22), a groove structure for embedding the convex strip (29) is provided on the inner walls of the driving sleeve (21) and the fixed sleeve (27), the top of the fixed sleeve (27) is welded to the top of the inner wall of the reactor to be tested, and a first flow guide pipe (30) is provided on one side of the bottom of the lifting pipe (28).

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