Stirring and cooling device for crucible furnace, stirring system and cooling control method

Abstract

The invention discloses a stirring and cooling device for a crucible furnace, a stirring system and a cooling control method, the stirring and cooling device adopts a water cooling bag with a water cooling cavity inside to surround a motor through an accommodating cavity, and flowing cooling water is provided for the water cooling cavity through a water inlet pipe and a water outlet pipe to take away heat of the water cooling bag and maintain a relatively low temperature; therefore, the motor is cooled and protected, and the problem that the temperature of the motor is too high due to the fact that the motor is easily affected by the crucible furnace can be effectively solved. As for the water supply structure, a first thermometer and a second thermometer are arranged on the water return pipe and the water supply pipe respectively, an adjusting valve is arranged on the water supply pipe, the difference value between the water supply temperature and the water return temperature can be obtained through the first thermometer and the second thermometer during use, and when the difference value is large, the water supply flow can be increased through the adjusting valve; and the retention time of the low-temperature cooling water in the water cooling cavity is shortened, and the difference value is maintained in a relatively low range, so that the cooling protection effect of the water cooling bag on the motor is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of glass manufacturing special-purpose kiln, and particularly relates to a stirring and cooling device for a crucible furnace, a stirring system and a cooling control method. BACKGROUND

[0002] In the field of glass manufacturing, in addition to continuously supplying the molten glass liquid formed by the glass kiln to the production of conventional glass, a crucible furnace equipped with a stirring structure is also needed to supply the glass liquid with high temperature and uniformity to the production of part of special glass in batches. The stirring structure of the crucible furnace mainly includes a motor and a stirring shaft. The motor is generally fixed above the mouth of the crucible furnace through a support, the upper end of the stirring shaft is synchronously rotationally connected with the motor shaft, the lower end extends into the crucible furnace and is fixedly connected with stirring blades, and the motor drives the stirring blades to rotate through the stirring shaft, so as to stir the glass liquid in the crucible furnace. For example, a melting furnace for preparing optical glass is disclosed in Chinese Patent CN209957640U, and a melting furnace for beer bottle production is disclosed in Chinese Patent CN213739140U. In order to ensure the stability of the transmission stirring, the length of the stirring shaft is generally set to be relatively short under the premise of meeting the use, which makes the motor close to the crucible furnace. Since the temperature in the crucible furnace is relatively high, although a cover plate is arranged on the mouth of the crucible furnace to reduce the heat transfer to the outside, in order to avoid the internal pressure of the crucible furnace being too high and to ensure the smooth rotation of the stirring shaft, a relatively large gap is generally left between the shaft hole of the cover plate through which the stirring shaft passes and the stirring shaft. The high-temperature flue gas in the crucible furnace will gush out through the gap, which still easily leads to the temperature of the motor being too high, and further causes the liquefaction leakage of the internal lubricating grease of the motor, the accelerated aging of the electrical elements and the coil burnout and the like.

[0003] In order to reduce the occurrence of such situations, the motor is currently completely wrapped with fireproof cloth or thermal blanket. However, this passive heat insulation means can only avoid the overheating of the motor in a relatively short time, and the use effect is poor. After a long time of use, the motor is still difficult to avoid the situation of the temperature being too high due to the continuous heat radiation of the crucible furnace to the outside, the increase of the environmental temperature and the heat conduction of the stirring shaft itself. Therefore, it is necessary to design a stirring and cooling device for a crucible furnace to avoid the failure of the stirring structure caused by the temperature of the motor being too high, so that the stirring structure can be stably operated for a long time, and the uniformity of the stirred glass liquid is ensured and the glass production quality is improved. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a stirring and cooling device for a crucible furnace, a stirring system and a cooling control method, to solve the technical problem that the motor is easily affected by the crucible furnace and the temperature is too high, and to achieve the effects of improving the stability of the operation of the stirring structure and ensuring the uniformity of the stirred glass liquid.

[0005] To solve the above technical problems, the present application adopts the following technical solutions: The application discloses a stirring cooling device for a crucible furnace, which is used for cooling a stirring structure and comprises a motor and a stirring shaft, and the stirring cooling device comprises a cooling structure, wherein the cooling structure comprises a water cooling bag which is a hollow structure with a water cooling cavity, the water cooling bag is provided with a water inlet pipe and a water outlet pipe which are communicated with the water cooling cavity, and an accommodating cavity for accommodating the motor is formed in the upper surface of the water cooling bag, and a shaft hole is formed in the bottom of the accommodating cavity for the stirring shaft to pass through.

[0006] Further, the stirring cooling device further comprises a water supply structure, the water supply structure comprises a circulating water source, the water inlet pipe is communicated with a water supply end of the circulating water source through a water supply pipe, the water outlet pipe is communicated with a water return end of the circulating water source through a water return pipe, and the water supply pipe is provided with a flow meter for monitoring the water supply flow and an adjusting valve for adjusting the water supply flow.

[0007] Further, the water return pipe is provided with a first temperature meter for measuring the water return temperature.

[0008] Further, the water supply pipe is provided with a second temperature meter for measuring the water supply temperature.

[0009] Further, the water supply structure further comprises a bypass pipe, the bypass pipe is communicated with the water supply pipe at two ends, the adjusting valve and the flow meter are located between the two ends of the bypass pipe on the water supply pipe, the water supply pipe is provided with a first auxiliary valve which is always open between the two ends of the bypass pipe, and the bypass pipe is provided with a second auxiliary valve which is always closed.

[0010] Further, the cavity of the accommodating cavity is in a cylindrical shape, the water cooling cavity comprises an upper annular cavity surrounding the accommodating cavity and a lower annular cavity surrounding the shaft hole, and the upper annular cavity is vertically connected with and communicated with the lower annular cavity.

[0011] Further, the water inlet pipe is communicated with the lower annular cavity, the water outlet pipe is communicated with the top of the upper annular cavity, and the communication positions of the water inlet pipe and the water outlet pipe with the lower annular cavity and the upper annular cavity are distributed on both sides of the accommodating cavity along the radial direction of the accommodating cavity.

[0012] Further, the connecting position of the upper annular cavity and the lower annular cavity is provided with an annular partition plate, the annular partition plate is provided with a communication hole which is vertically formed at the position opposite to the communication position of the water outlet pipe and the upper annular cavity, and the upper annular cavity and the lower annular cavity are communicated through the communication hole.

[0013] Further, in the radial direction, a plurality of vertical partitions are distributed in the lower annular cavity between the communication hole and the communication between the water inlet pipe and the lower annular cavity; the thickness direction of the vertical partition corresponds to the radial direction, the upper end of the vertical partition abuts against the top surface of the lower annular cavity or / and the annular partition, and the lower end of the vertical partition abuts against the bottom surface of the lower annular cavity; the vertical partition includes a first vertical partition and a second vertical partition, the two ends of the first vertical partition in the transverse direction are spaced apart from the adjacent side wall of the lower annular cavity, the two ends of the second vertical partition in the transverse direction abut against the adjacent side wall of the lower annular cavity, the second vertical partition is provided with a notch, and the first vertical partition and the second vertical partition are alternately distributed in the radial direction.

[0014] Further, the vertical partition close to the communication hole or / and the communication between the water inlet pipe and the lower annular cavity is a first vertical partition.

[0015] Further, a plurality of transverse partitions are vertically distributed in the upper annular cavity, the transverse partition is annular and the inner and outer sides thereof abut against the two side walls of the upper annular cavity; the transverse partition includes a first transverse partition and a second transverse partition, the first transverse partition is provided with a first backflow hole opposite to the communication hole, the second transverse partition is provided with a second backflow hole, the first backflow hole and the second backflow hole are distributed along the radial direction and located on the two sides of the accommodating cavity, and the first transverse partition and the second transverse partition are alternately distributed in the vertical direction.

[0016] Further, the transverse partition close to the top of the upper annular cavity or / and the annular partition is a second transverse partition.

[0017] The application also includes a stirring system for a crucible furnace, which comprises the stirring and cooling device for a crucible furnace, the water-cooled package and the motor are vertically hoisted above the crucible furnace through the support, the stirring shaft is vertically arranged, the upper end thereof is synchronously rotationally connected with the shaft of the motor, the lower end thereof extends into the crucible furnace and is fixedly connected with the stirring blade, the motor is located in the accommodating cavity, and the stirring shaft penetrates through the shaft hole and is rotationally and sealingly matched.

[0018] The application also includes a cooling control method for a crucible furnace, which uses the stirring and cooling device for a crucible furnace, and the cooling control method comprises: supplying water by the circulating water source, measuring the return water temperature and the supply water temperature by the first temperature table and the second temperature table respectively, adjusting the supply water flow by the adjusting valve, and making the difference between the return water temperature and the supply water temperature less than or equal to 10℃.

[0019] Compared with the prior art, the application has the following beneficial effects: 1. The stirring cooling device for the crucible furnace, wherein the water cooling package is a hollow structure with a water cooling cavity, and the flowing cooling water can take away the heat acting on the water cooling package after the water cooling cavity is supplied with the flowing cooling water through the water inlet pipe and the water outlet pipe, so that the water cooling package maintains a lower temperature and plays a role in temperature reduction protection for the motor, and the problem that the motor is easily affected by the crucible furnace and has a temperature that is too high can be effectively solved, so that the situations such as liquefaction leakage of internal lubricating grease of the motor, accelerated aging of electrical elements and coil burning are avoided, and the stability of the stirring structure in operation and the service life of the stirring structure are improved.

[0020] 2. The stirring cooling device for the crucible furnace, wherein the first temperature table and the second temperature table are arranged on the water return pipe and the water supply pipe respectively, and the adjusting valve is arranged on the water supply pipe, and in use, the water supply temperature can be checked through the second temperature table, so as to ensure that the water supply temperature meets the use requirement; the difference between the water supply temperature and the water return temperature can be obtained through the first temperature table and the second temperature table, and if the difference is large, it indicates that the cooling water stays in the water cooling cavity for a long time and absorbs more heat, and the advantage of the low water supply temperature cannot be fully utilized, at this time, the water supply flow can be increased through the adjusting valve, the staying time of the low-temperature cooling water in the water cooling cavity is shortened, and the difference between the water supply temperature and the water return temperature is maintained within a lower range, so as to ensure the temperature reduction protection effect of the water cooling package on the motor.

[0021] 3. The stirring cooling device for the crucible furnace, wherein the shape of the water cooling cavity corresponds to that of the accommodating cavity and comprises an upper annular cavity and a lower annular cavity, so that the cooling water flowing into the water cooling package forms a liquid separation layer surrounding the accommodating cavity, the accommodating cavity is not only separated from the external heat through the structure of the water cooling package itself, but also separated from the external heat through the liquid separation layer, so as to improve the temperature reduction protection effect of the water cooling package on the motor; in addition, the annular partition plate is arranged at the joint of the upper annular cavity and the lower annular cavity, and the horizontal partition plate and the vertical partition plate are arranged in the upper annular cavity and the lower annular cavity respectively, so that the cooling water first passes through the lower annular cavity in the water cooling package, the temperature difference advantage is fully utilized to quickly absorb the heat at the bottom of the water cooling package, and the cooling water in the upper annular cavity and the lower annular cavity is timely and effectively replaced, so as to avoid local overheating and ensure the temperature reduction protection effect of the water cooling package on the motor, and the reliability and practicability of the stirring cooling device for the crucible furnace are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall schematic view of the stirring system for the crucible furnace; Figure 2 It is the side view of the structure of the stirring system for the crucible furnace except the water supply structure; Figure 1 Figure 3 It is the sectional view of the water cooling package along A-A in the basic state; Figure 2 ​​Figure 4 Fig. 2 is a schematic view of the crucible furnace with the addition of a vertical partition plate on the basis of Fig. 1; Figure 3 Fig. 3 is a schematic view of the crucible furnace with the addition of a horizontal partition plate on the basis of Fig. 1; Figure 5 Fig. 4 is a schematic view of the crucible furnace with the addition of a vertical partition plate on the basis of Fig. 2; Figure 4 Fig. 5 is a schematic view of the crucible furnace with the addition of a horizontal partition plate on the basis of Fig. 2; Figure 6 Fig. 6 is a schematic view of the crucible furnace along the section B-B in Fig. 1; Figure 5 Fig. 7 is a schematic view of the crucible furnace along the section B-B in Fig. 2; Figure 7 Fig. 8 is a schematic view of the crucible furnace with the addition of a horizontal partition plate on the basis of Fig. 1; Figure 5 Fig. 9 is a schematic view of the crucible furnace with the addition of a horizontal partition plate on the basis of Fig. 2; Wherein, the crucible furnace 1, the cover plate 2, the motor 3, the stirring shaft 4, the support 5, the stirring blade 6, the water-cooled package 7, the water-cooled cavity 8, the water inlet pipe 9, the water outlet pipe 10, the containing cavity 11, the shaft hole 12, the coupling 13, the vertical rod 14, the horizontal rod 15, the screw rod 16, the nut 17, the circulating water source 18, the water supply pipe 19, the water return pipe 20, the main valve 21, the adjusting valve 22, the first temperature table 23, the second temperature table 24, the bypass pipe 25, the first auxiliary valve 26, the second auxiliary valve 27, the upper annular cavity 28, the lower annular cavity 29, the annular partition plate 30, the communication hole 31, the first vertical partition plate 32, the second vertical partition plate 33, the gap 34, the notch 35, the lower annular cavity flow channel 36, the first horizontal partition plate 37, the second horizontal partition plate 38, the first backflow hole 39, the second backflow hole 40, the upper annular cavity flow channel 41, the flowmeter 42. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0024] Embodiment: Please refer to Figure 2 and Figure 3, a stirring cooling device for a crucible furnace, used for cooling a stirring structure, the stirring structure includes a motor 3 and a stirring shaft 4, the stirring cooling device includes a cooling structure, the cooling structure includes a water-cooling bag 7, the water-cooling bag 7 is a hollow structure with a water-cooling cavity 8, the water-cooling bag 7 is provided with a water inlet pipe 9 and a water outlet pipe 10 connected to the water-cooling cavity 8, the upper surface of the water-cooling bag 7 is recessed to form a receiving cavity 11 for accommodating the motor 3, the bottom of the receiving cavity 11 is penetrated by a shaft hole 12 for the stirring shaft 4 to pass through; the shaft hole 12 on the water-cooling bag 7 is different from the shaft hole on the cover plate described in the background technology, the shaft hole 1 on the water-cooling bag 7 2. There is no need to relieve the pressure of the crucible furnace 1, and high-temperature flue gas does not need to pass between the stirring shaft 4 and the inner wall of the shaft hole 12. There is no risk of glass liquid splashing into the space and solidifying therein, thereby affecting the rotation of the stirring shaft. Therefore, during implementation, in order to prevent high-temperature flue gas from flowing upward between the stirring shaft 4 and the inner wall of the shaft hole 12, thereby causing the temperature of the motor 3 to rise, a sealed bearing can be provided in the shaft hole 12 to cooperate with the rotation seal of the stirring shaft 4, or the diameter of the shaft hole 12 can be adapted to the diameter of the stirring shaft 4, and a high-temperature resistant and wear-resistant coating (such as a ceramic coating or a graphene coating) can be provided on the inner wall of the shaft hole 12 to cooperate with the rotation of the stirring shaft 4.

[0025] The stirring and cooling device for the crucible furnace of the present invention is as follows: Figure 2 As shown, when in use, the water-cooling bag 7 accommodates and surrounds the motor 3 through the accommodating portion, so that the water-cooling bag 7 blocks the hot air gushing out of the crucible furnace 1 below for the motor 3, preventing the heat from directly acting on the motor 3; the water-cooling bag 7 is a hollow structure with a water-cooling cavity 8 inside. After flowing cooling water is provided to the water-cooling cavity 8 through the water inlet pipe 9 and the water outlet pipe 10, the flowing cooling water can take away the heat acting on the water-cooling bag 7, so that the water-cooling bag 7 maintains a low temperature, which plays a role in cooling and protecting the motor 3, and can effectively solve the problem that the motor 3 is easily affected by the crucible furnace 1 and the temperature is too high, thereby avoiding the liquefaction and leakage of grease inside the motor 3, accelerated aging of electrical components and burning of coils, etc., which is beneficial to improving the stability of the stirring structure operation and extending the service life of the stirring structure.

[0026] See Figure 1 The stirring cooling device further includes a water supply structure, which includes a circulating water source 18. The water inlet pipe 9 is connected to the water supply end of the circulating water source 18 through a water supply pipe 19, and the water outlet pipe 10 is connected to the return end of the circulating water source 18 through a return pipe 20. The water supply pipe 19 is provided with a flow meter 42 for monitoring the water supply flow and a regulating valve 22 for adjusting the water supply flow; Thus, the circulating water source 18 supplies cooling water to the water cooling cavity 8 through the water supply pipe 19 and the water inlet pipe 9, and the cooling water in the water cooling cavity 8 flows back to the circulating water source 18 through the water outlet pipe 10 and the water return pipe 20, so as to realize the recycling of the cooling water, which is conducive to saving water resources and reducing the use cost; in order to ensure that the cooling water supplied to the water cooling cavity 8 always maintains a low temperature, so as to ensure the cooling protection effect of the water cooling pack 7 on the motor 3, a refrigeration device can be installed at the circulating water source 18 to maintain the constant water temperature, or a circulating water source 18 with a large volume can be selected to maintain the constant water temperature by virtue of the large specific heat capacity and high heat transfer performance of the water; in the embodiment, the water supply pipe 19 is further provided with a main valve 21 for controlling the on-off of the water supply pipe 19, and in use, the main valve 21 is opened to make the water supply pipe 19 conductive, and then the water supply flow can be adjusted through the regulating valve 22, so that the water cooling pack 7 can exert different degrees of cooling protection effect.

[0027] Please refer to Figure 1 , the water return pipe 20 is provided with a first temperature table 23 for measuring the return water temperature; thus, in use, the main valve 21 is opened to make the water supply pipe 19 conductive, and then the return water temperature is observed through the first temperature table 23. In order to ensure that the return water temperature is close to the average water temperature in the water cooling cavity 8 and the water cooling pack 7 has a better effect, the return water temperature should not be too high, and at this time, the water supply flow can be adjusted through the regulating valve 22, so as to adjust the return water temperature by changing the residence time of the low-temperature cooling water in the water cooling cavity 8.

[0028] Please refer to Figure 1 , the water supply pipe 19 is provided with a second temperature table 24 for measuring the water supply temperature; thus, in use, the water supply temperature can be observed through the second temperature table 24, so as to ensure that the water supply temperature meets the use requirement; in addition, the difference between the water supply temperature and the return water temperature can be obtained through the first temperature table 23 and the second temperature table 24, and if the difference is large, it indicates that the low-temperature cooling water stays in the water cooling cavity 8 for a long time and absorbs a large amount of heat, which fails to fully exert the advantage of the low water supply temperature, and at this time, the water supply flow can be increased through the regulating valve 22 to shorten the residence time of the low-temperature cooling water in the water cooling cavity 8, so as to maintain the difference between the water supply temperature and the return water temperature within a low range, which is conducive to ensuring the cooling protection effect of the water cooling pack 7 on the motor 3.

[0029] Please refer to Figure 1The water supply structure also includes a bypass pipe 25, both ends of the bypass pipe 25 are respectively connected to the water supply pipe 19, the regulating valve 22 and the flow meter 42 are located between the two ends of the bypass pipe 25 on the water supply pipe 19, and a normally open first auxiliary valve 26 is provided on the water supply pipe 19 between the two ends of the bypass pipe 25, and a normally closed second auxiliary valve 27 is provided on the bypass pipe 25; in this embodiment, the main valve 21 is arranged on the water supply pipe 19 near the circulating water source 18, and the first auxiliary valve 26 is arranged on the water supply pipe 19 between the two ends of the bypass pipe 25 near the circulating water source 18; in this way, when the flow meter 42 fails and needs maintenance, the regulating valve 22 and the first auxiliary valve 26 can be closed, and the second auxiliary valve 27 can be opened to make the bypass pipe 25 conductive, and the cooling water bypasses the flow meter 42 and enters the water cooling chamber 8, thereby ensuring the normal operation of the water cooling bag 7, which is conducive to improving the practicality of the stirring and cooling device of the crucible furnace 1.

[0030] See Figure 3 The body of the accommodating chamber 11 is cylindrical, and the water-cooling chamber 8 includes an upper annular chamber 28 surrounding the accommodating chamber 11 and a lower annular chamber 29 surrounding the axial hole 12, and the upper annular chamber 28 is vertically connected to and communicated with the lower annular chamber 29; in this way, the water-cooling chamber 8 is composed of the upper annular chamber 28 surrounding the accommodating portion and the lower annular chamber 29 located below the accommodating portion. The water-cooling chamber 8 makes the cooling water more evenly distributed in the water-cooling pack 7, which can avoid local overheating of the water-cooling pack 7. The water-cooling chamber 8 is adapted to the shape of the accommodating portion and completely surrounds the accommodating portion, so that the cooling water entering the water-cooling pack 7 forms a liquid barrier surrounding the accommodating portion, so that the accommodating portion not only isolates the motor 3 from the external heat through the structure of the water-cooling pack 7 itself, but also isolates the motor 3 from the external heat through the liquid barrier, which is beneficial to improving the temperature reduction protection effect of the water-cooling pack 7 on the motor 3.

[0031] Taking into account the connection position of the water outlet pipe 10 and the water-cooling chamber 8, at the bottom or lower than the connection point of the water inlet pipe 9 and the water-cooling chamber 8, the water-cooling chamber 8 may not be able to store water or the effect of the water-cooling bag 7 may be greatly reduced. Therefore, the present invention further defines that the water inlet pipe 9 is connected to the lower annular chamber 29, the water outlet pipe 10 is connected to the top of the upper annular chamber 28, and the connection point between the water inlet pipe 9 and the lower annular chamber 29 and the connection point between the water outlet pipe 10 and the upper annular chamber 28 are distributed on both sides of the accommodating chamber 11 along the radial direction of the accommodating chamber 11; in this way, since the lower annular chamber 29 is larger than the lower annular chamber 29, the water outlet pipe 10 is connected to the top of the upper annular chamber 28. The upper annular cavity 28 is closest to the crucible furnace 1 and is heated more strongly, so that the lower end of the water inlet pipe 9 is located in the lower annular cavity 29, so that the cooling water with lower temperature can avoid the upper annular cavity 28 and enter the lower annular cavity 29 first, and use the temperature difference advantage to quickly absorb the heat at the bottom of the water-cooling package 7, which is beneficial to lowering the temperature of the water-cooling package 7 and improving the cooling protection effect of the water-cooling package 7 on the motor 3; the water outlet pipe 10 is connected to the top of the upper annular cavity 28, and the cooling water enters the water-cooling cavity 8 at a low level and exits at a high level. By filling the water-cooling cavity 8 with cooling water, it is ensured that the water-cooling package 7 can fully play its role.

[0032] See Figure 3 andFigure 4 On the basis that the upper annular cavity 28 and the lower annular cavity 29 are vertically connected and communicated, the embodiment is provided with an annular partition plate 30 at the joint of the upper annular cavity 28 and the lower annular cavity 29, a communication hole 31 is vertically arranged on the annular partition plate 30 opposite to the communication position of the water outlet pipe 10 and the upper annular cavity 28, and the upper annular cavity 28 and the lower annular cavity 29 are communicated through the communication hole 31. In this way, the annular partition plate 30 separates the upper annular cavity 28 and the lower annular cavity 29 and only communicates them through the communication hole 31. After the cooling water enters the lower annular cavity 29 through the water inlet pipe 9, the cooling water is blocked by the annular partition plate 30 and cannot immediately enter the upper annular cavity 28 upward, but flows horizontally in the lower annular cavity 29 first, and then enters the upper annular cavity 28 upward at the communication hole 31. This ensures that the cooling water with lower temperature flows through the lower annular cavity 29 first, so as to achieve the effect of "rapidly absorbing the heat at the bottom of the water cooled package 7 by utilizing the temperature difference advantage". In addition, in the implementation, the water supply pipe 19 can be directly communicated with the lower annular cavity 29 horizontally, but the water supply pipe 19 is close to the bottom of the water cooled package 7 and protrudes horizontally, which may interfere with the surrounding structure and is not convenient for connecting the water supply pipe 19. In the embodiment, in order to facilitate the connection of the water supply pipe 19 and the water return pipe 20, the water inlet pipe 9 and the water return pipe 20 are vertically connected on the upper surface of the water cooled package 7. The lower end of the water inlet pipe 9 extends into the lower annular cavity 29 through the annular partition plate 30 in sequence, so as to be directly communicated with the lower annular cavity 29.

[0033] Please refer to Figure 5 and Figure 6 , further limited, in the radial direction, the lower annular cavity 29 is spaced apart between the communication hole 31 and the communication hole 31 between the water inlet pipe 9 and the lower annular cavity 29 and is spaced apart; the thickness direction of the vertical partition plate corresponds to the radial direction, the upper end of the vertical partition plate abuts with the top surface of the lower annular cavity 29 or / and the annular partition plate 30, and the lower end of the vertical partition plate abuts with the bottom surface of the lower annular cavity 29; the vertical partition plate comprises a first vertical partition plate 32 and a second vertical partition plate 33, the transverse ends of the first vertical partition plate 32 are spaced apart from the adjacent side wall of the lower annular cavity 29, the transverse ends of the second vertical partition plate 33 abut with the adjacent side wall of the lower annular cavity 29, the second vertical partition plate 33 is provided with a notch 35, and the first vertical partition plate 32 and the second vertical partition plate 33 are alternately distributed in the radial direction; Thus, as the diameter of the shaft hole 12 is smaller than the diameter of the accommodating portion, the lower annular cavity 29 can be considered as a cylinder almost, and when the cooling water enters the lower annular cavity 29 through the water inlet pipe 9 without the vertical partition, the cooling water can directly flow to the communication hole 31 through the shortest path of the radial symmetry distribution of the water inlet pipe 9 and the water outlet pipe 10, which can cause the cooling water in the lower annular cavity 29 to be replaced slowly and have a high temperature in the areas on both sides of the radial direction, thereby affecting the heat insulation effect of the lower annular cavity 29. As described above, when the first vertical partition 32 and the second vertical partition 33 are alternately arranged in the lower annular cavity 29, the lower annular cavity flow channel 36 is formed between the adjacent first vertical partition 32 and the second vertical partition 33, and when the cooling water enters the lower annular cavity 29 through the water inlet pipe 9, the cooling water can sequentially pass through each lower annular cavity flow channel 36 through the gap 34 and the notch 35, so that the cooling water can pass through each part of the lower annular cavity 29 as much as possible, and the cooling water in each part of the lower annular cavity 29 can be replaced timely and effectively. Although there is a difference in the order of the cooling water flowing through each part of the lower annular cavity 29, as long as the cooling water has a high flow rate, the temperature of each part of the lower annular cavity 29 can be balanced, the heat insulation effect of the lower annular cavity 29 can be avoided due to the high temperature in the local area, and the reliability and practicability of the stirring and cooling device of the crucible furnace 1 can be improved.

[0034] Please refer to Figure 6 In the embodiment, the vertical partitions near the communication between the water inlet pipe 9 and the lower annular cavity 29 and the communication hole 31 are all the first vertical partitions 32. Thus, when the cooling water enters the lower annular cavity 29 through the water inlet pipe 9, the cooling water can flow to the lower annular cavity flow channel 36 formed by the first vertical partition 32 and the adjacent second vertical partition 33 through the gap 34 after flowing to the areas on both sides of the radial direction, and then flow to the lower annular cavity flow channel 36 formed by the second vertical partition 33 and the next first vertical partition 32 through the notch 35 in the transverse middle part of the second vertical partition 33, so that the cooling water can flow back and forth along the radial direction during the process of flowing along the radial direction, thereby making the cooling water pass through each part of the lower annular cavity 29 as much as possible, and the cooling water in each part of the lower annular cavity 29 can be replaced timely and effectively. The heat insulation effect of the lower annular cavity 29 can be avoided due to the high temperature in the local area, and the reliability and practicability of the stirring and cooling device of the crucible furnace 1 can be improved. In addition, in the embodiment, there is only one first vertical partition 32 in the lower annular cavity 29 at the shaft hole 12 in the radial direction, the first vertical partition 32 is divided into two segments and abuts on both sides of the cylindrical inner wall formed by the shaft hole 12, and the notch 35 is located in the transverse middle part of the second vertical partition 33, so that the cooling water can be gathered in the center of the lower annular cavity flow channel 36 through the notch 35, which is beneficial to improve the uniformity of the flow of the cooling water in each part of the lower annular cavity 29, thereby improving the cooling protection effect of the water-cooled package 7.

[0035] Please refer to Figure 7 , further limited, a plurality of transverse partitions are vertically spaced in the upper annular cavity 28, and the transverse partitions are annular and abut the two side walls of the upper annular cavity 28 on the inner and outer sides; the transverse partitions include a first transverse partition 37 and a second transverse partition 38, a first backflow hole 39 opposite the communication hole 31 is provided through the first transverse partition 37, and a second backflow hole 40 is provided through the second transverse partition 38, the first backflow hole 39 and the second backflow hole 40 are distributed along the radial direction and located on both sides of the accommodation cavity 11, the first transverse partition 37 and the second transverse partition 38 are vertically alternately distributed, and the transverse partitions close to the top of the upper annular cavity 28 and the annular partition 30 are all second transverse partitions 38; in this way, without the transverse partitions, after the cooling water enters the upper annular cavity 28 through the communication hole 31 from the lower annular cavity 29, it may flow to the lower end of the water outlet pipe 10 along the shortest vertical path opposite the communication hole 31, which may cause the cooling water in other areas of the upper annular cavity 28 to be replaced slowly and have a higher temperature, thereby affecting the heat insulation effect of the upper annular cavity 28; as described above, after the first transverse partition 37 and the second transverse partition 38 are alternately arranged in the upper annular cavity 28, an upper annular cavity flow channel 41 is formed between adjacent first transverse partitions 37 and second transverse partitions 38, after the cooling water enters the upper annular cavity 28 through the communication hole 31, it is blocked by the adjacent second transverse partition 38, and then flows to the two second backflow holes 40 on the second transverse partition 38 from the communication hole 31 in the circumferential direction, and then enters the upper annular cavity flow channel 41 formed by the second transverse partition 38 and the adjacent first transverse partition 37 through the two second backflow holes 40, and then flows to the first backflow hole 39 of the first transverse partition in the circumferential direction, and then enters the upper annular cavity flow channel 41 formed by the next second transverse partition 38 through the first backflow hole 39, and then flows to the lower end of the water outlet pipe 10, so that the cooling water flows back and forth in the circumferential direction during the upward flow, so that the cooling water passes through as many places in the upper annular cavity 28 as possible, and the cooling water in each place in the upper annular cavity 28 is replaced in time and effectively, although there is a difference in the order of the cooling water flowing through each place in the upper annular cavity 28, as long as the cooling water has a relatively high flow rate, the temperature of each place in the upper annular cavity 28 can be basically balanced, and the heat insulation effect of the upper annular cavity 28 is not affected by the excessively high temperature in the local area, which is beneficial to improve the reliability and practicality of the stirring and cooling device of the crucible furnace 1; in addition, in this embodiment, the lower end of the water inlet pipe 9 extends into the lower annular cavity 29 through each transverse partition and the annular partition 30 in sequence; on this basis, the second backflow hole 40 on the second transverse partition 38 is designed to have two and be located on the circumferential sides of the water inlet pipe 9, so that after the cooling water enters the upper annular cavity flow channel 41 through the first backflow hole 39, it can be divided into two streams and enter the next upper annular cavity flow channel 41 through the two second backflow holes 40, thereby avoiding the vertically penetrating second transverse partition 38 water inlet pipe 9, and ensuring that the cooling water also passes through each place in the upper annular cavity 28.

[0036] Please see Figure 1 and Figure 2 To better understand the stirring cooling device for the crucible furnace, the stirring system for the crucible furnace formed by using the stirring cooling device is introduced as follows, in which the water cooling package 7 and the motor 3 are vertically hung above the crucible furnace 1 through the support 5, the stirring shaft 4 is vertically arranged and the upper end thereof is synchronously rotationally connected with the motor 3, the lower end thereof extends into the crucible furnace 1 and is fixedly connected with the stirring blade 6, and the motor 3 is located in the accommodating cavity 11 and the stirring shaft 4 penetrates through the shaft hole 12 and is rotationally and sealingly matched; in this way, the stirring system for the crucible furnace, in which the motor 3 is hung below the support 5, the motor 3 drives the stirring blade 6 to stir the glass liquid in the crucible furnace 1 through the stirring shaft 4, and the water cooling package 7 is also fixed below the support 5 and accommodates the motor 3 through the accommodating cavity 11, so that the water cooling package 7 plays a cooling protection role on the motor 3.

[0037] In this embodiment, the mouth portion of the crucible furnace 1 is provided with the cover plate 2 to reduce the heat transfer to the outside and maintain the temperature in the furnace, the shaft hole 12 is provided through the cover plate 2 to allow the stirring shaft 4 to penetrate therethrough, the upper end of the stirring shaft 4 is synchronously rotationally connected with the motor 3 through the coupling 13, to avoid the fasteners for connection on the coupling 13 from thermal expansion in the high-temperature environment and cause difficulty in subsequent maintenance and disassembly, the coupling 13 is also arranged in the accommodating portion; the support 5 includes the vertical rod 14 and the horizontal rod 15, the vertical rod 14 is arranged upright on the ground close to the crucible furnace 1, one end of the horizontal rod 15 is connected with the vertical rod 14 and the other end thereof extends above the crucible furnace 1, the motor 3 is vertically hung on the horizontal rod 15 to facilitate the water cooling sleeve to surround the motor 3 from bottom to top; the upper surface of the water cooling package 7 is vertically connected with at least two screw rods 16, the screw rods 16 are threadedly connected with two nuts 17, the screw rods 16 vertically penetrate through the horizontal rod 15, and the two nuts 17 abut against the upper and lower sides of the horizontal rod 15 to allow the horizontal rod 15 to fix the water cooling package 7 through the screw rods 16; based on the principle of blocking and heat insulation, it can be conceived that the water cooling package 7 is designed into a plate shape instead of a recessed shape to wrap the motor 3, but in this way, not only the water cooling package 7 needs to have a larger transverse dimension, but also it is easy to interfere with the heating element installed on the cover plate 2; in addition, to improve the cooling and heat insulation effect of the water cooling package 7 on the motor 3, the horizontal rod 15 can also be designed into a plate shape to abut against the upper surface of the water cooling package 7.

[0038] In order to make the stirring cooling device for the crucible furnace of the application better play the cooling protection effect, the cooling control method for the crucible furnace based on the stirring cooling device is introduced as follows: the circulating water source 18 supplies water, the return water temperature and the supply water temperature are measured by the first temperature table 23 and the second temperature table 24 respectively, the supply water flow is adjusted by the adjusting valve 22, and the difference between the return water temperature and the supply water temperature is less than or equal to 10℃; in this way, during use, the supply water temperature is generally 20℃-25℃, the temperature rise of the cooling water after passing through the water cooling pack 7 is obtained by the first temperature table 23 and the second temperature table 24, the supply water flow is controlled by the adjusting valve 22, the temperature rise of the cooling water is controlled within 10℃, the water cooling pack 7 is kept at a lower temperature, and thus the water cooling pack 7 can play a better cooling protection effect on the motor 3, the failure of the motor 3 due to excessively high temperature can be effectively avoided, and the stability of the operation of the stirring structure is improved, and the uniformity of the glass liquid is not affected by the failure of the stirring structure.

[0039] In summary, the water cooling pack 7 with the water cooling cavity 8 in the application surrounds the motor 3 from bottom to top through the accommodating cavity 11, the flowing cooling water provided by the water inlet pipe 9 and the water outlet pipe 10 takes away the heat acting on the water cooling pack 7, the water cooling pack 7 is kept at a lower temperature, and thus the water cooling pack 7 plays a cooling protection effect on the motor 3, the problem that the motor 3 is easily affected by the crucible furnace 1 and has excessively high temperature can be effectively solved, the stability of the operation of the stirring structure is improved, and the service life of the stirring structure is prolonged; and the water cooling cavity 8 is further designed to be composed of the upper annular cavity 28 and the lower annular cavity 29, the flowing cooling water forms a liquid separation layer surrounding the accommodating cavity 11, and thus the cooling protection effect of the water cooling pack 7 on the motor 3 is improved; the annular partition plate 30 is arranged at the joint of the upper annular cavity 28 and the lower annular cavity 29, and the horizontal partition plate and the vertical partition plate are arranged in the upper annular cavity 28 and the lower annular cavity 29 respectively, the cooling water in the water cooling pack 7 first passes through the lower annular cavity 29, the temperature difference advantage is fully utilized to quickly absorb the heat at the bottom of the water cooling pack 7, the cooling water in the upper annular cavity 28 and the lower annular cavity 29 is timely and effectively replaced, the local overheating condition is avoided, and the cooling protection effect of the water cooling pack 7 on the motor 3 is ensured; in addition, for the water supply structure, the first temperature table 23 and the second temperature table 24 are arranged on the return water pipe 20 and the water supply pipe 19 respectively, and the adjusting valve 22 is arranged on the water supply pipe 19; during use, the supply water temperature can be checked by the second temperature table 24, so that the supply water temperature can meet the use requirement, the difference between the supply water temperature and the return water temperature can be obtained by the first temperature table 23 and the second temperature table 24, when the difference is large, the supply water flow can be increased by the adjusting valve 22, the residence time of the low-temperature cooling water in the water cooling cavity 8 is shortened, the difference is maintained within a lower range, and thus the cooling protection effect of the water cooling pack 7 on the motor 3 is ensured.

[0040] Finally, it needs to be explained that the above examples are only used to illustrate the technical solutions of the present application but not to limit the technical solutions, and those of ordinary skill in the art should understand that the technical solutions of the present application are modified or equivalently replaced without departing from the purpose and scope of the technical solutions, which should be covered in the scope of claims of the present application.

Claims

1. A stirring and cooling device for a crucible furnace, used to cool a stirring structure, the stirring structure including a motor and a stirring shaft, characterized in that: The stirring and cooling device includes a cooling structure, which includes a water-cooling bag. The water-cooling bag is a hollow structure with a water-cooling cavity inside. The water-cooling bag is provided with a water inlet pipe and a water outlet pipe connected to the water-cooling cavity. The upper surface of the water-cooling bag is recessed to form a accommodating cavity for accommodating the motor, and the bottom of the accommodating cavity is penetrated by an axial hole for allowing the stirring shaft to pass through.

2. The stirring and cooling device for a crucible furnace according to claim 1, characterized in that: The stirring cooling device also includes a water supply structure, which includes a circulating water source. The water inlet pipe is connected to the water supply end of the circulating water source through the water supply pipe, and the water outlet pipe is connected to the return end of the circulating water source through the return pipe. The water supply pipe is provided with a flow meter for monitoring the water supply flow and a regulating valve for adjusting the water supply flow.

3. The stirring and cooling device for a crucible furnace according to claim 2, characterized in that: The return water pipe is provided with a first thermometer for measuring the return water temperature.

4. The stirring and cooling device for a crucible furnace according to claim 3, characterized in that: A second thermometer for measuring the water supply temperature is provided on the water supply pipe.

5. The stirring and cooling device for a crucible furnace according to claim 2, characterized in that: The water supply structure also includes a bypass pipe, the two ends of which are respectively connected to the water supply pipe. The regulating valve and the flow meter are located between the two ends of the bypass pipe on the water supply pipe. A normally open first auxiliary valve is provided on the water supply pipe between the two ends of the bypass pipe, and a normally closed second auxiliary valve is provided on the bypass pipe.

6. The stirring and cooling device for a crucible furnace according to claim 1, characterized in that: The body of the accommodating chamber is cylindrical, and the water-cooling chamber comprises an upper annular chamber surrounding the accommodating chamber and a lower annular chamber surrounding the shaft hole. The upper annular chamber is vertically connected to and communicated with the lower annular chamber.

7. The stirring and cooling device for a crucible furnace according to claim 6, characterized in that: The water inlet pipe is connected to the lower annular cavity, the water outlet pipe is connected to the top of the upper annular cavity, and the connecting points of the water inlet pipe and the lower annular cavity and the connecting points of the water outlet pipe and the upper annular cavity are distributed on both sides of the accommodating cavity along the radial direction of the accommodating cavity.

8. The stirring and cooling device for a crucible furnace according to claim 7, characterized in that: An annular partition is provided at the junction of the upper annular cavity and the lower annular cavity. A communicating hole is penetrated on the annular partition facing the connection between the water outlet pipe and the upper annular cavity. The upper annular cavity and the lower annular cavity are connected through the communicating hole.

9. The stirring and cooling device for a crucible furnace according to claim 8, characterized in that: In the radial direction, a plurality of vertical partitions are spaced apart in the lower annular cavity between the connection point between the water inlet pipe and the lower annular cavity and the connecting hole; the thickness direction of the vertical partition corresponds to the radial direction, the upper end of the vertical partition abuts the top surface of the lower annular cavity or / and the annular partition, and the lower end of the vertical partition abuts the bottom surface of the lower annular cavity; the vertical partition includes a first vertical partition and a second vertical partition, the lateral ends of the first vertical partition have gaps with the adjacent side walls of the lower annular cavity, the lateral ends of the second vertical partition abut with the adjacent side walls of the lower annular cavity, and a notch is provided on the second vertical partition, and the first vertical partition and the second vertical partition are alternately distributed in the radial direction.

10. The stirring and cooling device for a crucible furnace according to claim 9, characterized in that: The vertical partitions close to the connection point between the water inlet pipe and the lower annular cavity and / or the communication hole are all first vertical partitions.

11. The stirring and cooling device for a crucible furnace according to claim 8, characterized in that: There are multiple transverse partitions distributed vertically at intervals in the upper annular cavity. The transverse partitions are annular and the inner and outer sides are respectively in contact with the two side walls of the upper annular cavity; the transverse partitions include a first transverse partition and a second transverse partition. The first transverse partition is penetrated by a first reflow hole that is opposite to the connecting hole, and the second transverse partition is penetrated by a second reflow hole. The first reflow hole and the second reflow hole are distributed along the radial direction and are located on both sides of the accommodating cavity. The first transverse partition and the second transverse partition are alternately distributed in the vertical direction.

12. The stirring and cooling device for a crucible furnace according to claim 11, characterized in that: The transverse partitions close to the top of the upper annular chamber and / or the annular partition are all second transverse partitions.

13. A stirring system for a crucible furnace, characterized in that: It comprises a stirring and cooling device for a crucible furnace as described in any one of claims 1 to 12, wherein the water cooling pack and the motor are vertically suspended above the crucible furnace through a bracket, the stirring shaft is vertically arranged and the upper end is synchronously rotated and connected with the motor shaft, the lower end extends into the crucible furnace and is fixedly connected to the stirring blade, the motor is located in the accommodating cavity, and the stirring shaft passes through the shaft hole and rotates and seals.

14. A cooling control method for a crucible furnace, characterized in that: Using a stirring cooling device for a crucible furnace as described in claim 4, the cooling control method includes: supplying water from a circulating water source, measuring the return water temperature and the supply water temperature respectively by a first thermometer and a second thermometer, adjusting the water supply flow by a regulating valve so that the difference between the return water temperature and the supply water temperature is less than or equal to 10°C.

Images