A muffle furnace heating rod replacement and removal device and method

Abstract

The present invention provides a replacement and removal device for a muffle furnace heating rod, which significantly improves the working efficiency and quality of replacing and removing the heating rod, enhances the safety of removal and installation, extends the service life of the equipment, and improves the product quality. The device includes a conveying device and a traction device arranged at the proximal end of the muffle furnace; the conveying device is embeddedly connected to some of the heating rods at the distal end or the proximal end of the muffle furnace; the traction device is sleeved on the exposed part of the heating rod at the proximal end of the muffle furnace, and the traction device is used to drive the heating rod to withdraw towards the proximal end of the muffle furnace. The device also includes a replacement and removal method, in which the traction device and the conveying device are respectively connected to the heating rods at the proximal and distal ends of the muffle furnace; the traction device provides traction to drive the heating rod to withdraw towards the proximal end of the muffle furnace, and at the same time, the conveying device moves towards the proximal end of the muffle furnace together with the heating rod from the distal end of the muffle furnace; when the conveying device moves a certain distance with the heating rod and then withdraws, the traction device continues to pull the heating rod until the heating rod completely withdraws from the proximal end of the muffle furnace, and the removal is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment maintenance engineering in the TFT glass production line, and specifically provides a muffle furnace heating rod replacement and removal device and method. Background Art

[0002] The overflow down-draw method for glass production plays a crucial role in the production of flat panel display substrate glass. During the production process of the overflow down-draw method, strict requirements are imposed on the size of the overflow trough and the precise control of the temperature field in the space around the overflow trough during production. The muffle furnace in the forming process undertakes all the functions of the overflow trough and its auxiliary equipment. The heating rod plays a role in precisely controlling the temperature field in the space around the overflow trough. However, during the use of the equipment, the service life of some heating devices is difficult to reach the full-life condition of the overall equipment. The manufacturing process of the overflow down-draw method determines the current situation where the temperature of the equipment is higher at the upper part than at the lower part during the forming process. During the production process, due to the natural upward movement of hot air, unwanted gas flow is generated at partially unsealed locations, eroding the corresponding heaters, thereby affecting the life of the heating rod and the uniformity of the temperature field. After the heating device is damaged, the temperature field during the production process is in a state where it is difficult to precisely control, seriously affecting the overflow quality, and ultimately resulting in equipment damage and high product manufacturing costs or inability to meet the requirements of the production process conditions. Therefore, it is necessary to promptly replace the new heating device to ensure the normal progress of glass product production and product quality.

[0003] However, due to the local temperature around the heating rod exceeding 1000°C, under high-temperature conditions, it is difficult for the operators to replace the heating device, and there are great risks for the operators during the replacement process, as well as adverse effects such as unfavorable disturbance of the temperature field. Currently, there is no set of special replacement and removal tooling, devices, and methods for heating rods. Generally, mainly rough methods such as manual pulling and hammer knocking are used, and the defects are as follows:

[0004] (1) When initially loosening, a hammer is used to strike the end face, causing the end face to be subjected to intense and uneven forces, which easily causes cracks and fractures in the heating rod, posing a hidden danger to the complete extraction of the final heating rod;

[0005] (2) After the heating rod is loosened, an artificial hand-holding method is adopted. The temperature of the heating rod is high, and it is difficult to exert force when wearing high-temperature gloves and working at heights, and there are personal safety problems. Moreover, it is impossible to ensure the levelness of the heating rod during the entire withdrawal process, easily causing fractures and low efficiency of the heating rod. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a muffle furnace heating rod replacement and removal device and method, which can significantly improve the working efficiency and quality of heating rod replacement and removal, while enhancing the safety of removal and installation, extending the service life of the equipment, and improving the product quality.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A muffle furnace heating rod replacement and removal device includes a conveying device and a traction device arranged at the proximal end of the muffle furnace;

[0009] The conveying device is embeddedly connected to a part of the heating rod at the distal end or the proximal end of the muffle furnace;

[0010] The traction device is sleeved on the exposed part of the heating rod at the proximal end of the muffle furnace, and the traction device is used to drive the heating rod to withdraw towards the proximal end of the muffle furnace.

[0011] Preferably, the traction device includes a proximal insulating sleeve, a clamping sleeve, a set screw, a connecting ring, a traction rope and a driving unit;

[0012] Among them, the proximal insulating sleeve wraps the exposed part of the heating rod at the proximal end of the muffle furnace, the clamping sleeve is clamped to the exposed part of the heating rod through the set screw, a connecting ring is fixedly connected to the traction side of the clamping sleeve, the connecting ring is connected to the driving unit through the traction rope, and the driving unit is used to provide power for pulling the heating rod.

[0013] Preferably, the connecting ring is arranged at the corresponding position of the center of the heating rod;

[0014] During removal, the traction rope is parallel to the axial direction of the heating rod.

[0015] Preferably, the conveying device adopts a support rod, and the heating rod is of a hollow structure;

[0016] During removal, the support rod is embeddedly connected to the heating rod from the distal end of the muffle furnace;

[0017] During replacement, the support rod is embeddedly connected to the heating rod from the proximal end of the muffle furnace.

[0018] Preferably, the support rod adopts a stainless steel pipe, and the diameter of the support rod is smaller than the inner diameter of the heating rod.

[0019] Preferably, it further includes a loosening device arranged at the distal end of the muffle furnace before removal, and the loosening device includes a distal insulating sleeve, a tightening sleeve, a fixing frame, a nut, a lead screw and a bearing;

[0020] The distal insulating sleeve wraps the exposed part of the heating rod at the distal end of the muffle furnace, one end of the tightening sleeve is embedded inside the heating rod, a concave hole is provided at the other end of the tightening sleeve, the lead screw passes through the bearing and is fixed through the fixing frame, one end of the lead screw is placed in the concave hole of the tightening sleeve, and the other end is sleeved with the nut.

[0021] Preferably, the outer diameter of the tightening sleeve is smaller than the inner diameter of the heating rod, and the outer diameter of the lead screw is smaller than the aperture of the concave hole of the tightening sleeve.

[0022] Preferably, the lead screw is a ball screw, and the bearing is a ball bearing.

[0023] A method for replacing and removing a heating rod of a muffle furnace includes the following steps:

[0024] Set the traction device on the exposed part of the heating rod at the proximal end of the muffle furnace, and insert the conveying device into the heating rod from the distal end of the muffle furnace;

[0025] The traction device provides a traction force to drive the heating rod to withdraw from the proximal end of the muffle furnace. At the same time, the conveying device moves from the distal end of the muffle furnace to the proximal end of the muffle furnace along with the heating rod, and the conveying device keeps the heating rod horizontal during the movement;

[0026] When the conveying device moves a certain distance along with the heating rod, withdraw the conveying device, and the traction device continues to pull the heating rod until the heating rod completely withdraws from the proximal end of the muffle furnace, and the removal is completed.

[0027] Preferably, after the removal is completed, it further includes replacing a new heating rod, which specifically includes the following steps:

[0028] After inserting the new heating rod from the proximal end of the muffle furnace for a certain distance, insert the conveying device into the new heating rod from the proximal end of the muffle furnace, and continue to insert the new heating rod by pushing the conveying device until the new heating rod completely passes through from the distal end of the muffle furnace, and the replacement is completed.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] A replacement and removal device for a muffle furnace heating rod provided by the present invention can achieve the rapid and safe replacement and removal of the muffle furnace heating rod in the forming process of the TFT glass production line. Compared with the previous rough methods of manually pulling or knocking with a hammer to replace and remove the heating rod, it is easy to cause severe and uneven force on the end face of the heating rod, resulting in cracks and fractures of the heating rod, posing a hidden danger to the complete extraction of the final heating rod. Since the temperature of the heating rod is high, it is difficult to exert force and there are personal safety problems when wearing high-temperature gloves and working at heights. The replacement and removal device designed in the present invention forms a complete set of special removal devices for heating rods, making the replacement and removal operations more standardized and regularized. Among them, by designing a traction device to clamp the heating rod near the muffle furnace and providing power to evenly pull the heating rod horizontally, the heating rod has a higher levelness, safer operation and higher efficiency during the entire withdrawal process, avoiding damage to the personal safety of operators caused by the high temperature of the heating rod. At the same time, a feeding device is designed to adopt the method of feeding from the far end, embed into the heating rod at the far end of the muffle furnace and connect with it as a whole, and feed the heating rod, which can ensure that the heating rod always moves in a horizontal straight line during the withdrawal movement, the withdrawal is more stable, reduce the friction between the local part of the heating rod and the steel structure of the muffle furnace during the withdrawal process, and reduce the risk of fracture. The replacement and removal device described in the present invention can greatly improve the working efficiency and quality of replacement and removal, reduce the risk of cold shock damage to the equipment caused by long replacement time, improve the operation safety, ensure the production safety of the muffle furnace equipment in the forming process of the TFT glass production line, provide a strong guarantee for the process conditions, and further extend the service life of the equipment and improve the product quality.

[0031] Further, in the present invention, a proximal insulating sleeve is wrapped outside the heating rod near the muffle furnace, which can protect the heating rod body and play a role of heat insulation at the same time. A clamping sleeve is sleeved on the heating rod wrapped with the proximal insulating sleeve and is tightly clamped and connected with the heating rod as a whole. The connecting ring and the traction rope arranged on the traction side of the clamping sleeve are connected to the driving unit. Starting the driving unit provides the traction power for the whole traction device, and then the clamping sleeve is pulled by the traction rope and drives the heating rod connected with the clamping sleeve as a whole to be tractioned. Under the action of the traction force, the heating rod starts to move out until the heating rod is completely withdrawn, then the driving unit is turned off and the traction is stopped, realizing the safe and stable removal of the heating rod.

[0032] Furthermore, in addition to the traction device designed at the proximal end of the muffle furnace driving the heating rod to move out, a pushing device is also designed at the distal end of the muffle furnace. In a specific embodiment, it is a support rod. By embedding the support rod into the heating rod to form an integral body, while pulling at the other end, the support rod at the distal end can support and lift the heating rod to always maintain horizontal axial movement without contacting and rubbing against the internal steel structure of the muffle furnace, damaging the heating rod and the muffle furnace equipment. The addition of this pushing device can significantly reduce the risk of local fracture of the heating rod, extend the service life of the equipment, and improve the product quality at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a cross-sectional structural schematic diagram of the replacement and removal device of the present invention;

[0034] Figure 2 is a schematic diagram of the support and pushing of the pushing device of the present invention;

[0035] Figure 3 is a schematic diagram of the proximal end of the muffle furnace in the embodiment of the present invention.

[0036] In the figure, there are muffle furnace 0, left first heating rod 1, left second heating rod 2, left third heating rod 3, left first heating rod mounting hole 4, left second heating rod mounting hole 5, left third heating rod mounting hole 6, right first heating rod 1', right second heating rod 2', right third heating rod 3', right first heating rod mounting hole 4', right second heating rod mounting hole 5', right third heating rod mounting hole 6', proximal insulating sleeve 7, distal insulating sleeve 7', bushing 8, setscrew 9, connecting ring 10, towing rope 11, traction device 12, tightening sleeve 13, fixing frame 14, nut 15, lead screw 16, bearing 17, support rod 18. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0039] The present invention will be further described in detail below with reference to the drawings:

[0040] As Figure 1 and 2 shown, a muffle furnace heating rod replacement and removal device of the present invention includes a conveying device and a traction device 12 arranged at the proximal end of the muffle furnace;

[0041] The conveying device is embeddedly connected to a part of the heating rod at the distal end or the proximal end of the muffle furnace;

[0042] The traction device 12 is sleeved on the exposed part of the heating rod at the proximal end of the muffle furnace, and the traction device 12 is used to drive the heating rod to withdraw towards the proximal end of the muffle furnace.

[0043] The present invention provides a replacement and removal device for a muffle furnace heating rod, which can realize the rapid and safe replacement and removal of the muffle furnace heating rod in the forming process of the TFT glass production line. Compared with the previous rough methods of manually pulling or knocking with a hammer to replace and remove the heating rod, it is easy to cause severe and uneven force on the end face of the heating rod, resulting in cracks and fractures of the heating rod, posing a hidden danger to the complete extraction of the final heating rod. The temperature of the heating rod is high, and it is difficult to exert force and there are personal safety problems when wearing high-temperature gloves and working at heights. The replacement and removal device designed in the present invention forms a complete set of special removal devices for heating rods, making the replacement and removal operations more standardized and regulated. Among them, by designing a traction device 12 to clamp the heating rod near the muffle furnace and providing power to traction the heating rod to be evenly pulled out horizontally, the heating rod has a higher levelness, safer operation and higher efficiency during the whole withdrawal process, avoiding the personal safety of operators damaged by the high temperature of the heating rod; at the same time, a feeding device is designed to adopt the method of feeding from the far end, embed into the heating rod at the far end of the muffle furnace and be connected as a whole to feed the heating rod, which can ensure that the heating rod always moves in a horizontal straight line during the withdrawal movement, the withdrawal is more stable, reduce the friction between the local part of the heating rod and the steel structure of the muffle furnace during the withdrawal process, and reduce the fracture risk. The replacement and removal device described in the present invention can greatly improve the working efficiency and quality of replacement and removal, reduce the risk of cold shock damage to the equipment caused by the long replacement time, improve the operation safety, ensure the production safety of the muffle furnace equipment in the forming process of the TFT glass production line and provide a strong guarantee for the process conditions, and further extend the service life of the equipment and improve the product quality.

[0044] Further, the traction device 12 includes a proximal insulating sleeve 7, a clamping sleeve 8, a setscrew 9, a connecting ring 10, a traction rope 11 and a driving unit;

[0045] Among them, the proximal insulating sleeve 7 wraps the exposed part of the heating rod near the muffle furnace, the clamping sleeve 8 is clamped to the exposed part of the heating rod through the setscrew 9, a connecting ring 10 is fixedly connected to the traction side of the clamping sleeve 8, the connecting ring 10 is connected to the driving unit through the traction rope 11, and the driving unit is used to provide power for pulling the heating rod.

[0046] In the present invention, by wrapping the proximal insulating sleeve 7 outside the heating rod near the muffle furnace, it can protect the heating rod body and play a role of heat insulation at the same time. The clamping sleeve 8 is sleeved on the heating rod wrapped with the proximal insulating sleeve 7 and is clamped and connected as a whole with the heating rod. Through the connecting ring 10 and the traction rope 11 arranged on the traction side of the clamping sleeve 8, it is connected to the driving unit. Starting the driving unit provides the traction power for the whole traction device 12, and then the traction rope 11 is used to pull the clamping sleeve 8 and drive the heating rod connected as a whole with the clamping sleeve 8 to be tractioned. Under the action of the traction force, the heating rod starts to make a withdrawal movement until the heating rod is completely withdrawn, then the driving unit is turned off and the traction is stopped, realizing the safe and stable removal of the heating rod.

[0047] Furthermore, the connecting ring 10 is arranged at the corresponding position in the center of the heating rod, which can make the traction force received by the heating rod more uniform and balanced, ensure that the heating rod will not deviate during the movement process, and always perform a horizontal withdrawal movement along the axial direction.

[0048] Furthermore, during removal, the traction rope 11 is parallel to the axial direction of the heating rod to ensure that the heating rod always performs a horizontal withdrawal movement along the axial direction.

[0049] Furthermore, the feeding device adopts a support rod 18, and the heating rod is of a hollow structure;

[0050] During removal, the support rod 18 is embedded and connected to the heating rod from the distal end of the muffle furnace;

[0051] During replacement, the support rod 18 is embedded and connected to the heating rod from the proximal end of the muffle furnace.

[0052] In addition to designing a traction device 12 at the proximal end of the muffle furnace to drive the heating rod to perform a withdrawal movement, the present invention also designs a feeding device at the distal end of the muffle furnace. In a specific embodiment, it is a support rod 18. By embedding the support rod 18 into the heating rod to form an integral body, while pulling at the other end, the support rod 18 at the distal end can support and lift the heating rod to always maintain a horizontal axial movement direction, and does not contact and rub with the internal steel structure of the muffle furnace, damaging the heating rod and the muffle furnace equipment. The addition of this feeding device can significantly reduce the risk of local fracture of the heating rod, extend the service life of the equipment, and improve the product quality while doing so.

[0053] Preferably, the support rod 18 is made of a stainless steel pipe, and the diameter of the support rod 18 is smaller than the inner diameter of the heating rod, which is convenient for the embedded connection between the support rod 18 and the heating rod.

[0054] Furthermore, it also includes a loosening device arranged at the distal end of the muffle furnace before removal. The loosening device includes a distal insulating sleeve 7', a tightening sleeve 13, a fixing frame 14, a nut 15, a lead screw 16, and a bearing 17;

[0055] The distal insulating sleeve 7' wraps the exposed part of the heating rod at the distal end of the muffle furnace. One end of the tightening sleeve 13 is embedded inside the heating rod, and a concave hole is provided at the other end of the tightening sleeve 13. The lead screw 16 passes through the bearing 17 and is fixed by the fixing frame 14. One end of the lead screw 16 is placed in the concave hole of the tightening sleeve 13, and the other end is sleeved with the nut 15.

[0056] In the present invention, a loosening device is also designed and added. Before demolition, instead of using a manual hammer to loosen the heating rod, the screw rod 16 is used to push it out. One end of the tightening sleeve 13 is embedded inside the heating rod, and the fixed frame 14, nut 15, screw rod 16, bearing 17, which are pre-assembled together, are fixed to the tightening sleeve 13. By rotating the nut 15 to tighten the tightening sleeve 13, the heating rod is pushed to make it loose. The heating rod loosening device provided by the present invention makes the end face of the heating rod receive uniform force and loosen quickly, greatly reducing the fracture risk of the heating rod.

[0057] Wherein, the outer diameter of the tightening sleeve 13 is smaller than the inner diameter of the heating rod, and the outer diameter of the screw rod 16 is smaller than the aperture of the concave hole of the tightening sleeve 13, which is convenient for the assembly of each component between the devices and the embedded connection between the device and the heating rod.

[0058] Preferably, the screw rod 16 is a ball screw, and the bearing 17 is a ball bearing.

[0059] The present invention also provides a method for replacing and removing the heating rod of a muffle furnace, including the following steps:

[0060] The traction device 12 is sleeved on the exposed part of the heating rod at the proximal end of the muffle furnace, and the feeding device is embedded into the heating rod from the distal end of the muffle furnace;

[0061] The traction device 12 provides traction force to drive the heating rod to withdraw from the proximal end of the muffle furnace. At the same time, the feeding device moves from the distal end of the muffle furnace to the proximal end of the muffle furnace along with the heating rod. The feeding device keeps the heating rod horizontal during the movement;

[0062] When the feeding device moves along with the heating rod for a certain distance, the feeding device is withdrawn, and the traction device 12 continues to pull the heating rod until the heating rod completely withdraws from the proximal end of the muffle furnace, and the demolition is completed.

[0063] Furthermore, after the demolition is completed, it also includes replacing a new heating rod, specifically including the following steps:

[0064] After inserting the new heating rod from the proximal end of the muffle furnace for a certain distance, the feeding device is embedded into the new heating rod from the proximal end of the muffle furnace, and the new heating rod is continuously inserted by pushing the feeding device until the new heating rod completely passes through from the distal end of the muffle furnace, and the replacement is completed.

[0065] Embodiment

[0066] In this embodiment, taking the flowing direction of the glass liquid as from right to left and from top to bottom, the right side of the flowing direction of the glass liquid is the proximal end of the muffle furnace, and the left side is the distal end of the muffle furnace.

[0067] As Figure 3As shown in the figure, in this embodiment, the muffle furnace is provided with a left first heating rod 1, a left second heating rod 2, a left third heating rod 3, a left first heating rod mounting hole 4, a left second heating rod mounting hole 5, a left third heating rod mounting hole 6, a right first heating rod 1', a right second heating rod 2', a right third heating rod 3', a right first heating rod mounting hole 4', a right second heating rod mounting hole 5', and a right third heating rod mounting hole 6'. Among them, each muffle furnace is provided with 6 horizontal heating rods, 3 on each of the left and right sides, which are arranged vertically respectively. The left first heating rod 1, the left second heating rod 2, the left third heating rod 3, the right first heating rod 1', the right second heating rod 2', and the right third heating rod 3' are all of hollow structure, and the length is between 2m and 6m.

[0068] In this embodiment, a device for replacing and removing the heating rod of the muffle furnace includes a proximal insulating sleeve 7, a distal insulating sleeve 7', a ferrule 8, a setscrew 9, a connecting ring 10, a traction rope 11, a traction device 12, a tightening sleeve 13, a fixing frame 14, a nut 15, a lead screw 16, a bearing 17, and a support rod 18.

[0069] Among them, as Figure 1 shown, the left first heating rod 1 is sequentially connected with a proximal insulating sleeve 7, a ferrule 8, a setscrew 9, a connecting ring 10, a traction rope 11, and a traction device 12.

[0070] Among them, the support rod 18 is a stainless steel pipe, the ferrule 8 and the connecting ring 10 are made of stainless steel, and the setscrew 9 is made of carbon steel.

[0071] Among them, the traction rope 11 is a steel wire rope; the traction device 12 is a standard device.

[0072] Among them, the lead screw 16 is a ball screw, and the bearing 17 is a ball bearing.

[0073] Among them, as Figure 2 shown, when the left first heating rod 1 withdraws towards the proximal end of the muffle furnace, the left first heating rod 1 is connected to the support rod 18 and is embedded in the inner hole of the left first heating rod 1.

[0074] Among them, the traction rope 11 is connected to the connecting ring 10 and can rotate freely relative to the connecting ring 10.

[0075] Among them, the traction rope 11 is horizontally concentric with the connecting ring 10 and the right first heating rod.

[0076] Among them, a proximal insulating sleeve 7 is provided at the proximal end of the heating rod, and a distal insulating sleeve 7' is provided at the distal end of the heating rod. Both the proximal insulating sleeve 7 and the distal insulating sleeve 7' are made of insulating and high-temperature resistant materials.

[0077] Among them, the tightening sleeve 13 is inserted into the left first heating rod 1 from the distal end, and the outer diameter of the tightening sleeve 13 is smaller than the inner diameter of the left first heating rod 1 (about 8 - 10mm).

[0078] Among them, the outer diameter of the lead screw 16 is smaller than the aperture diameter of the concave hole of the tightening sleeve 13.

[0079] In this embodiment, the settings of the second left heating rod 2, the third left heating rod 3, the first right heating rod 1', the second right heating rod 2', and the third right heating rod 3' are the same as those of the first left heating rod 1.

[0080] In this embodiment, the specific removal and replacement process is as follows:

[0081] Step 1: Assemble the nut 15 with the lead screw 16, the bearing 17, and the fixing bracket 14 in advance, then install the fixing bracket 14, and embed the tightening sleeve 13 into the first left heating rod 1.

[0082] Step 2: While performing Step 1, install the traction device 12, assemble the ferrule 8 with the connecting ring 10 and the setscrew 9, sleeve the ferrule 8 from the proximal end onto the first left heating rod 1, and tighten the ferrule 8 against the first left heating rod 1 with the setscrew 9, and connect the traction rope 11 with the connecting ring 10.

[0083] Step 3: Use a wrench to rotate the nut 15 to tighten the tightening sleeve 13 and push the first left heating rod 1 until the first left heating rod 1 reaches the loose state position and stops.

[0084] Step 4: Quickly remove the tightening sleeve 13 and the fixing bracket 14.

[0085] Step 5: Immediately insert the support rod 18 into the first left heating rod 1 from the distal end.

[0086] Step 6: Start the traction device 12, and uniformly pull the connecting ring 10 through the traction rope 11 to drive the first left heating rod 1 to withdraw towards the proximal end together.

[0087] Step 7: While the first left heating rod 1 withdraws towards the proximal end together, use the support rod 18 to hold the first left heating rod 1 from the distal end, so that the support rod 18 moves towards the proximal end following the traction device 12 together with the first left heating rod 1.

[0088] Step 8: When the distance that the support rod 18 moves towards the proximal end following the traction device 12 together with the first left heating rod 1 is greater than one-third of the length of the first left heating rod 1, withdraw the support rod 18.

[0089] Step 9: Continue to start the traction device 12 until the first left heating rod 1 completely withdraws from the proximal steel structure of the muffle furnace.

[0090] Step 10: Remove the ferrule 8, the traction rope 11, and the traction device 12.

[0091] Step 11: Hold the new heating rod horizontally and insert it into the installation hole 4 of the first left heating rod from the proximal end. Stop inserting until the insertion depth of the new heating rod is one-third of the length of the heating rod.

[0092] Step Twelve: Quickly insert the support rod 18 into the new heating rod, and start continuing the insertion work of the new heating rod until the new heating rod completely passes through from the distal end;

[0093] Step Thirteen: Quickly pull out the support rod 18, that is, the removal and replacement of the left first heating rod 1 are completed.

[0094] Step Fourteen: The methods for removing and replacing the left second heating rod 2, the left third heating rod 3, the right first heating rod 1', the right second heating rod 2', and the right third heating rod 3' are the same as the steps for removing and replacing the left first heating rod 1, that is, repeat the above Steps One to Thirteen.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A replacement and removal device for a muffle furnace heating rod, characterized in that, it includes a conveying device and a traction device (12) arranged at the proximal end of the muffle furnace; the conveying device is embedded and connected to a part of the heating rod at the distal end or the proximal end of the muffle furnace; the traction device (12) is sleeved on the exposed part of the heating rod at the proximal end of the muffle furnace, and the traction device (12) is used to drive the heating rod to withdraw towards the proximal end of the muffle furnace; it further includes a loosening device arranged at the distal end of the muffle furnace before removal, and the loosening device includes a distal insulating sleeve (7'), a tightening sleeve (13), a fixing frame (14), a nut (15), a lead screw (16) and a bearing (17); the distal insulating sleeve (7') wraps the exposed part of the heating rod at the distal end of the muffle furnace, one end of the tightening sleeve (13) is embedded inside the heating rod, a concave hole is opened at the other end of the tightening sleeve (13), the lead screw (16) passes through the bearing (17) and is fixed by the fixing frame (14), one end of the lead screw (16) is placed in the concave hole of the tightening sleeve (13), and the other end is sleeved with the nut (15); the outer diameter of the tightening sleeve (13) is smaller than the inner diameter of the heating rod, and the outer diameter of the lead screw (16) is smaller than the aperture of the concave hole of the tightening sleeve (13); the lead screw (16) adopts a ball screw, and the bearing (17) adopts a ball bearing.

2. A replacement and removal device for a muffle furnace heating rod according to claim 1, characterized in that, the traction device (12) includes a proximal insulating sleeve (7), a clamping sleeve (8), a set screw (9), a connecting ring (10), a traction rope (11) and a driving unit; wherein, the proximal insulating sleeve (7) wraps the exposed part of the heating rod at the proximal end of the muffle furnace, the clamping sleeve (8) is clamped to the exposed part of the heating rod through the set screw (9), a connecting ring (10) is fixedly connected to the traction side of the clamping sleeve (8), the connecting ring (10) is connected to the driving unit through the traction rope (11), and the driving unit is used to provide power for pulling the heating rod.

3. A replacement and removal device for a muffle furnace heating rod according to claim 2, characterized in that, the connecting ring (10) is arranged at the corresponding position at the center of the heating rod; during removal, the traction rope (11) is parallel to the axis of the heating rod.

4. A replacement and removal device for a muffle furnace heating rod according to claim 1, characterized in that, the conveying device adopts a support rod (18), and the heating rod is of a hollow structure; during removal, the support rod (18) is embedded and connected to the heating rod from the distal end of the muffle furnace; during replacement, the support rod (18) is embedded and connected to the heating rod from the proximal end of the muffle furnace.

5. A replacement and removal device for a muffle furnace heating rod according to claim 4, characterized in that, the support rod (18) adopts a stainless steel pipe, and the diameter of the support rod (18) is smaller than the inner diameter of the heating rod.

6. A method for replacing and removing a muffle furnace heating rod, characterized in that, based on the replacement and removal device according to any one of claims 1-5, it includes the following steps: sleeve the traction device (12) on the exposed part of the heating rod at the proximal end of the muffle furnace, and embed the conveying device into the heating rod from the distal end of the muffle furnace; The traction device (12) provides traction force to drive the heating rod to withdraw from the proximal end of the muffle furnace. At the same time, the feeding device moves from the distal end of the muffle furnace to the proximal end of the muffle furnace together with the heating rod, and the feeding device keeps the heating rod horizontal during the movement. After the feeding device moves a certain distance together with the heating rod, the feeding device is withdrawn, and the traction device (12) continues to traction the heating rod until the heating rod completely withdraws from the proximal end of the muffle furnace, and the removal is completed.

7. A method for replacing and removing a heating rod of a muffle furnace according to claim 6, characterized in that, after the removal is completed, it further includes replacing a new heating rod, which specifically includes the following steps: After inserting the new heating rod from the proximal end of the muffle furnace for a certain distance, the feeding device is inserted into the new heating rod from the proximal end of the muffle furnace, and the new heating rod is continuously inserted by pushing the feeding device until the new heating rod completely passes through the distal end of the muffle furnace, and the replacement is completed.

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