A method of hot swapping a stir bar

Abstract

The present application relates to the field of TFT-LCD substrate glass production, and particularly relates to a method for replacing a stirring rod in a hot state; S1, marking the original position of a stirring mechanism and then stopping, removing connecting components and a heat preservation structure; S2, moving the stirring rod by a lifting device until the stirring rod is separated from a stirring tank, and in the moving process, a preheating follow-up device is installed on the stirring rod for heat preservation; S3, replacing the stirring rod by a swing arm device, installing the preheating follow-up device on the replaced stirring rod, and preheating the replaced stirring rod to a predetermined temperature by the preheating follow-up device; S4, lowering the replaced stirring rod to the stirring tank by the lifting device, centering the replaced stirring rod, and restoring the connecting components and the heat preservation structure. By cooperation of various devices, the safety and efficiency of the stirring tank in the replacement process are ensured, the contact time of the glass liquid with the external environment is further reduced, heat loss is avoided, and thus the stable operation of the production line and the product quality are maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of TFT-LCD substrate glass production, in particular to a method for replacing a stirring rod in a hot state. BACKGROUND

[0002] In the production and manufacturing process of TFT-LCD (Thin Film Transistor-Liquid Crystal Display) substrate glass, in order to ensure the high-quality homogenization of the glass liquid, the stirrer plays a key role in ensuring that the glass liquid is fully mixed during melting and homogenization, thereby meeting the standards, and the stirring rod, as a core operating component in the stirrer, directly relates to the efficiency and product quality of the entire production line.

[0003] However, in actual production, the stirrer may have various abnormal conditions, such as damage to the stirring rod. In order to ensure the continuity and stability of production, once the stirrer has an abnormality, the stirring rod needs to be replaced quickly. However, the overall temperature of the equipment is high in a hot state, and the production environment of the equipment has high humidity, which increases the risk of scalding for the operator during the hot replacement process. In addition, the high humidity environment also causes the operator's hands to be slippery, increasing the risk of operation errors. In addition, the self-weight of the stirring rod is relatively large, so that the operator not only takes a long time, but also has low replacement efficiency, further increasing the burden of the operator. Finally, the replaced stirring rod needs to be preheated for a long time, and the temperature of the glass liquid in the stirring tank will fluctuate, causing the local temperature to drop suddenly and resulting in defects in the quality of the glass liquid. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a method for replacing a stirring rod in a hot state, which is realized by a preheating follow-up device, a lifting device installed on the stirring mechanism, and an arm swinging device. The method solves the problems of long time consumption during replacement of the stirring rod, difficulty in replacement by the operator due to high temperature of the stirring rod itself and high temperature and humidity of the environment, and long preheating time of the replaced stirring rod.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The present application provides a method for replacing a stirring rod in a hot state, which is realized by a preheating follow-up device, a lifting device installed on the stirring mechanism, and an arm swinging device. The method comprises the following steps:

[0007] S1, mark the original position of the stirring mechanism and stop, remove the connecting parts and heat preservation structure;

[0008] S2, moving the stirring rod by the lifting device until the stirring rod is separated from the stirring tank, and the preheating follow-up device is installed on the stirring rod to keep the stirring rod warm during the moving process;

[0009] S3, replacing the stirring rod by the swing arm device, installing the preheating follow-up device on the replaced stirring rod, and preheating the replaced stirring rod to a predetermined temperature by the preheating follow-up device;

[0010] S4, lowering the replaced stirring rod to the stirring tank by the lifting device, centering the replaced stirring rod, and restoring the connecting part and the heat preservation structure, and completing the hot state replacement of the stirring rod.

[0011] As a further improvement of the present application, the connecting part in S1 comprises a chain arranged outside the stirring tank, a cooling air pipe arranged around the outer wall of the stirring tank, and a heater arranged on the top of the stirring tank.

[0012] The heat preservation structure comprises a heat preservation layer outside the stirring tank and a heating base brick on the top of the stirring tank.

[0013] As a further improvement of the present application, the preheating follow-up device comprises a heat preservation shell and a heating element, and at least one heating element is arranged in the heat preservation shell, wherein the heat preservation shell is a flexible structure and can be sleeved on the surface of the stirring rod.

[0014] As a further improvement of the present application, the flexible structure comprises a first cloth layer, a ceramic fiber blanket layer and a second cloth layer arranged in sequence from inside to outside.

[0015] The first cloth layer, the ceramic fiber blanket layer and the second cloth layer are stitched by glass fiber.

[0016] As a further improvement of the present application, the heating element is a silicon-carbon rod, and the silicon-carbon rod is arranged between the ceramic fiber blanket layer and the first cloth layer.

[0017] As a further improvement of the present application, after S2, the top of the stirring tank is sequentially provided with a transition brick, a heat preservation blanket and a heat preservation plate from bottom to top.

[0018] As a further improvement of the present application, the swing arm device is used to replace the stirring rod, and the specific process is as follows:

[0019] The swing arm device is connected with the stirring rod, and the fixing bolts at the bottom of the stirring rod are removed, the swing arm device is rotated to drive the stirring rod to move to a suitable position, and the stirring rod is removed.

[0020] The swing arm device is connected with the stirring rod to be replaced, the swing arm device is rotated to move the stirring rod to be replaced to an installation position, and the stirring rod to be replaced is installed on the stirring mechanism.

[0021] As a further improvement of the present application, before S4, the heat preservation plate, the heat preservation blanket and the transition brick are removed in sequence.

[0022] As a further improvement of the present application, in S4, the preheating follow-up device is stacked to the top of the stirring tank when the replaced stirring rod is lowered by the lifting device.

[0023] As a further improvement of the present application, after S4, the replaced stirring rod is gradually restored to the preset rotating speed.

[0024] The present application has the following technical effects relative to the prior art:

[0025] The present application realizes the safe replacement of the stirring rod in the high-temperature and high-humidity environment of TFT-LCD substrate glass production through the coordinated operation of the preheating follow-up device, the lifting device, and the swing arm device, thereby improving the production continuity and product quality; the preheating follow-up device of the present application ensures that the stirring rod is always in the appropriate temperature range during the replacement process through heat preservation and heating, thereby reducing the problems of cracking and deformation of the stirring rod caused by temperature differences; the lifting device of the present application controls the vertical displacement of the stirring rod, so that the stirring rod can quickly separate or reset to the stirring tank, greatly shortening the manual operation time and reducing the risk of exposure of the operator in the high-risk environment; the swing arm device of the present application replaces the traditional manual handling through mechanization, not only solving the problem of low replacement efficiency caused by the large weight of the stirring rod, but also ensuring the safety and efficiency of the stirring rod replacement process through the cooperation of the devices, reducing the contact time of the glass liquid with the external environment, avoiding heat loss, and thereby maintaining the stable operation of the production line.

[0026] The preheating follow-up device of the present application adopts a multi-layer composite structure combined with the embedded heating of silicon-carbon rods, realizes the all-around uniform heating of the stirring rod, and at the same time adopts a flexible design that can closely fit the surface of the stirring rod, enhancing the sealing performance and heat preservation efficiency; the preheating follow-up device of the present application not only solves the problem of high temperature and large heat radiation of the equipment, making it difficult for personnel to operate at close range, thereby ensuring the safety of personnel operation, but also preheats the new stirring rod before it enters the glass liquid, thereby avoiding temperature difference problems of the new stirring rod. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Fig. 1 is a structural schematic diagram of the preheating follow-up device of the present application;

[0028] Figure 2 Fig. 2 is a structural schematic diagram of the lifting device of the present application;

[0029] Figure 3 Fig. 3 is a structural schematic diagram of the swing arm device of the present application;

[0030] Figure 4 Fig. 4 is a flowchart of the hot-state replacement of the stirring rod of the present application.

[0031] Mark No. : 1, clamp; 2, heat preservation shell; 3, heating piece; 4, temperature measuring port; 5, middle slide plate; 6, motor mounting bracket; 7, upper slide plate; 8, hand crank; 9, motor; 10, coupling; 11, reversing speed reducer input shaft; 12, reversing speed reducer; 13, reversing speed reducer output shaft; 14, reversing speed reducer bracket; 15, rotating piece; 16, fixed plate; 17, swing arm; 18, connecting plate; 19, fastener. DETAILED DESCRIPTION

[0032] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0033] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0038] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] like Figure 4 As shown, the present invention provides a method for hot replacement of stirring rods, which is achieved by a preheating follower device and a lifting device and a swing arm device installed on the stirring mechanism. The method includes the following steps:

[0043] S1. Mark the original position of the stirring mechanism and stop the machine, then remove the connecting parts and insulation structure;

[0044] S2, moving the stirring rod by the lifting device until the stirring rod is separated from the stirring tank, and the preheating follow-up device is installed on the stirring rod during the moving process to keep the stirring rod warm;

[0045] S3, replacing the stirring rod by the swing arm device, installing the preheating follow-up device on the replaced stirring rod, and preheating the replaced stirring rod to a predetermined temperature by the preheating follow-up device;

[0046] S4, lowering the replaced stirring rod to the stirring tank by the lifting device, centering the replaced stirring rod, and restoring the connecting component and the heat preservation structure, thereby completing the hot state replacement of the stirring rod.

[0047] As shown in Figure 1 The preheating follow-up device of the embodiment includes a heat preservation shell 2, a plurality of heating elements 3 are arranged in the heat preservation shell 2, and the heat preservation shell 2 is in a flexible structure as a whole, so that the heat preservation shell 2 can be attached to the stirring rod and wrap the stirring rod.

[0048] Figure 1 As shown in the figure, the side and bottom of the heat preservation shell 2 in the embodiment are provided with opening and closing seams, and the opening and closing seams are connected by glass fibers; the top of the heat preservation shell 2 is provided with a fixing element, which is used to fix the heat preservation shell 2 at the flange on the top of the stirring rod, so as to realize the connection with the stirring rod; the fixing element is preferably a clamp 1, which is fixed by cooperating with a nut through a screw, but is not limited thereto, and different fixing elements can be selected according to different use scenarios.

[0049] The heat preservation shell 2 in the embodiment includes a first cloth layer, a ceramic fiber blanket layer and a second cloth layer arranged in sequence from inside to outside, wherein the first cloth layer and the second cloth layer are preferably high-silicon cloth, and the ceramic fiber blanket layer is preferably a 1600 type ceramic fiber blanket, wherein the high-silicon cloth and the 1600 type ceramic fiber blanket are both high-temperature refractory materials, which can improve the heat protection effect when wrapping the stirring rod and prevent the stirring rod from causing harm to the operator; the heat preservation shell 2 is further provided with a plurality of temperature measuring openings 4, each of which is used to insert a thermocouple, and the diameter of the temperature measuring opening 4 is preferably 5mm, so that the heating temperature of the heating element 3 can be measured by the thermocouple to control the preheating temperature, so as to ensure that the stirring rod is always in a suitable temperature range; the heating element 3 in the embodiment is preferably a silicon-carbon rod.

[0050] As shown in Figure 2As shown, the lifting device in the embodiment comprises a coupling 10, a motor mounting bracket 6, a motor 9 and a hand crank 8; one end of the coupling 10 is connected with a reversing speed reducer input shaft 11 of the stirring mechanism, and the other end is connected with an output shaft of the motor 9; the motor mounting bracket 6 is connected with an intermediate slide plate 5 of the stirring mechanism through a screw, and is also connected with an upper slide plate 7 of the stirring mechanism through a screw; the hand crank 8 of the embodiment replaces a cooling fan at an input end of an original motor of the stirring mechanism, and is installed on a shaft of the cooling fan at the input end of the motor, so that two modes of manual hand-cranking and automatic lifting of the stirring mechanism can be used.

[0051] The motor 9 is fixed on the motor mounting bracket 6, and the model of the motor 9 is preferably Y290L-4; the motor 9 is connected with an electrical control cabinet panel, and a forward / reverse rotation selection switch of the motor 9 is installed on the electrical control cabinet panel; a switch signal of the motor 9 is connected with a frequency converter input of the mixer, and the motor 9 is driven to rotate forward and reversely by using the frequency converter, so as to realize automatic lifting of the mixer; and the hand crank 8 can be used to manually lift the stirring mechanism when manual lifting is needed.

[0052] The working principle is that the motor 9 is rotated by hand-cranking through the hand crank 8 or by direct power supply, the rotating motor 9 drives the reversing speed reducer input shaft 11 of the stirring mechanism to rotate through the coupling 10, the rotating reversing speed reducer input shaft 11 drives the reversing speed reducer 12 installed on a reversing speed reducer bracket 14 to rotate, the reversing speed reducer 12 drives the reversing speed reducer output shaft 13 to rotate, the reversing speed reducer output shaft 13 drives the lifting screw rod to rotate, and the rotating lifting screw rod drives the stirring mechanism to lift.

[0053] As shown in the figure, Figure 3 As shown in the figure, the swing arm device in the embodiment comprises a rotating part 15, a fixed plate 16, a swing arm 17, a connecting plate 18 and a fastener 19; the fixed plate 16 is connected with one end of the swing arm 17 through the rotating part 15, the other end of the swing arm 17 is provided with the connecting plate 18, and the fastener 19 can clamp or release the stirring rod to be replaced along the circumference of the stirring rod to be replaced; the rotating part 15 in the embodiment is preferably a rotating shaft; the fastener 19 comprises a fastening sleeve ring and a locking part matched with each other; after the connecting plate 18 is buckled with the stirring rod to be replaced, the fastening sleeve ring is sleeved, and the locking part is locked, so that the swing arm 17 clamps the stirring rod to be replaced, and the replacement operation is performed.

[0054] The working principle is that the fixed plate 16 is installed on a tripod of the stirring mechanism, the stirring rod to be replaced is clamped through the connecting plate 18 and the fastener 19, and the swing arm 17 can be rotated under the action of the rotating part 15; after the stirring rod to be replaced is moved to a suitable position, the stirring rod is installed on the stirring mechanism.

[0055] As shown in the figure, Figure 4 As shown in the figure, the method for replacing the stirring rod in a hot state is provided, and the method comprises the following steps:

[0056] Step one, mark the original position of the stirring mechanism and stop, specifically before the stirring mechanism stops, record the real-time running parameters of the stirring mechanism through the control system, including the height of the stirring rod, the tilt angle and the vertical alignment accuracy with the stirring tank, confirm that the parameters are correct, and then turn off the power switch of the stirring mechanism; this step can provide data for the subsequent resetting of the replaced stirring rod, ensuring that the position of the replaced stirring rod is consistent with the original position.

[0057] Remove the connecting parts: remove the chain by loosening the chain fixing bolts at the top of the stirring mechanism with a special wrench, and remove the chain in sections; remove the cooling air pipe by removing the cooling air pipe flange bolts connected to the stirring tank and removing the cooling air pipe with lifting equipment; remove the top heater by disconnecting the heater power cord and removing the heater from the top of the stirring tank.

[0058] Remove the heat preservation structure: remove the heat preservation layer outside the stirring tank and the heating base bricks at the top of the stirring tank. Removing the connecting parts exposes the opening at the top of the stirring tank, and the preheating follower device is stacked on the opening.

[0059] Step two, use the lifting device to drive the stirring rod to separate from the stirring tank. First, the motor 9 of the lifting device is used to automatically lift the stirring rod. When the top of the stirring rod is separated from the stirring tank, the top of the heat preservation shell 2 is fixed to the flange at the top of the stirring rod through the clamp 1. When the stirring rod is completely separated from the stirring tank, the heat preservation shell 2 is lowered from the top of the stirring rod to wrap the stirring rod, and the opening of the heat preservation shell 2 is closed by glass fiber jointing. The surface of the stirring rod needs to be cleaned before jointing. The heat preservation shell 2 can not only isolate external heat loss, but also uniformly heat through silicon-carbon rods to achieve heat preservation.

[0060] When the stirring rod rises to a certain height, switch the working mode of the lifting device, and use the hand crank 8 to drive the stirring rod to the designated position.

[0061] After the stirring rod is separated from the stirring tank, temporary heat preservation measures need to be installed. Specifically, transition bricks made of zirconia ceramic are laid on the opening at the top of the stirring tank, a heat preservation blanket, preferably a multi-layer ceramic fiber blanket, is laid on the surface of the transition bricks, and a composite heat preservation plate is installed outside the heat preservation blanket. The outer layer of the composite heat preservation plate is stainless steel plate, and the inner layer is ceramic fiber plate. The composite heat preservation plate is connected to the top of the stirring tank by bolts. The heat preservation measures can reduce the heat loss of the stirring tank and maintain the stability of the glass liquid temperature.

[0062] Step three, after the stirring rod is lowered to the appropriate position by the lifting device, the swing arm device is connected with the stirring rod, specifically, the fixed plate 16 is installed on the tripod of the stirring mechanism, the connecting plate 18 is clamped along the circumference of the stirring rod and is fixed by using the fastener 19, the swing arm 17 is slowly rotated, and the stirring rod is moved under the action of the rotating part 15; the fixed bolt at the bottom of the stirring rod is removed, and the removed stirring rod is placed on the special pedestal.

[0063] The stirring rod to be replaced is connected and fixed with the swing arm device, the swing arm device is rotated to move the stirring rod to be replaced to the installation position, and the stirring rod to be replaced is installed on the stirring mechanism.

[0064] The preheating follow-up device is installed on the replaced stirring rod, the replaced stirring rod is wrapped and connected by the heat preservation shell 2, and the replaced stirring rod is preheated to the set temperature by using the heating part 3,

[0065] Then the replaced stirring rod is lowered to the top of the stirring tank by the lifting device, and it is ensured that the replaced stirring rod is coincided with the center of the opening at the top of the stirring tank.

[0066] Step four, the heat preservation plate and the heat preservation blanket are removed in turn, the transition bricks are removed, the lifting device is started, the replaced stirring rod is lowered into the stirring tank by the motor 9, the opening and closing joint at the bottom of the heat preservation shell 2 is opened, and the heat preservation shell 2 is stacked on the opening at the top of the stirring tank during the lowering process.

[0067] After the replaced stirring rod is lowered to the stirring tank for a period of time, the hand crank 8 is switched, the replaced stirring rod is lowered to the original position by hand cranking, the heat preservation structure and the connecting part outside the stirring tank are reinstalled, the replaced stirring rod gradually recovers to the preset rotating speed, and the whole stirring rod replacement operation is completed.

[0068] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0069] Furthermore, it should be understood that although the specification is described in terms of embodiments, each of which contains only one independent technical solution, the specification is described in this way only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that the skilled person can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A method for replacing a stirring rod in a hot state, characterized in that: The method is achieved by preheating a follower device and a lifting device and a swing arm device installed on the stirring mechanism, and includes the following steps: S1. Mark the original position of the stirring mechanism and stop the machine, then remove the connecting parts and insulation structure; S2. The stirring rod is driven to move by the lifting device until it leaves the stirring tank, and a preheating follower is installed on the stirring rod to keep it warm during the movement; the preheating follower includes a heat-insulating shell and a heating element, and at least one heating element is provided in the heat-insulating shell, wherein the heat-insulating shell is a flexible structure and can be sleeved on the surface of the stirring rod; S3, replacing the stirring rod by the swing arm device, installing a preheating follower device on the replaced stirring rod, and preheating the replaced stirring rod to a predetermined temperature by the preheating follower device; S4. Use the lifting device to drive the replaced stirring rod down to the stirring tank, align it, and restore the connecting parts and insulation structure to complete the hot replacement of the stirring rod.

2. The method for hot-changing agitating rod according to claim 1, characterized in that: The connecting components in S1 include a chain provided outside the mixing tank, a cooling air duct provided around the outer wall of the mixing tank, and a heater installed on the top of the mixing tank; The heat-insulating structure comprises a heat-insulating layer outside the stirring tank and a heating base brick on the top of the stirring tank.

3. The method for hot replacement of a stirring rod according to claim 1, characterized in that: The flexible structure comprises a first cloth layer, a ceramic fiber blanket layer and a second cloth layer arranged in sequence from the inside to the outside; The first cloth layer, the ceramic fiber blanket layer and the second cloth layer are sewn together by glass fibers.

4. The method for hot-changing agitating rod according to claim 1, characterized in that: The heating element is a silicon carbon rod, and the silicon carbon rod is arranged between the ceramic fiber blanket layer and the first cloth layer.

5. The method for hot-changing agitating rod according to claim 1, characterized in that: After S2 is performed, transition bricks, insulation blankets and insulation boards are installed on the top of the mixing tank in sequence from bottom to top.

6. The method for hot-changing agitating rod according to claim 1, characterized in that: The stirring rod is replaced by the swing arm device. The specific process is as follows: Connect the swing arm device to the stirring rod and remove the fixing bolts at the bottom of the stirring rod. Turn the swing arm device to move the stirring rod to the appropriate position and remove the stirring rod. Connect the swing arm device to the stirring rod to be replaced, rotate the swing arm device to move the stirring rod to be replaced to the installation position, and install the stirring rod to be replaced in the stirring mechanism.

7. The method for hot-changing agitating rods according to claim 5, characterized in that: Before proceeding to S4, the insulation board, insulation blanket and transition bricks are removed in sequence.

8. The method for hot-changing agitating rods according to claim 1, characterized in that: When the replaced stirring rod is driven down by the lifting device in S4, the preheating follower device is stacked to the top of the stirring tank.

9. The method for hot-changing agitating rods according to claim 1, characterized in that: After S4, the replaced stirring rod is gradually restored to the preset rotation speed.

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