Feeding protection device for glass kiln and glass kiln comprising device

Abstract

Disclosed are a feeding protection device for a glass kiln, and a glass kiln comprising the feeding protection device. The feeding protection device comprises: a feeding body, wherein the feeding body is provided with a through feeding channel, two ends of the feeding channel are respectively an inner end adapted to be in communication with the interior of the kiln and an outer end adapted to be in communication with the external environment, the inner end and the outer end of the feeding channel are respectively provided with an inner protection door and an outer protection door, and the feeding channel is open when the inner protection door and the outer protection door are both opened and is blocked when at least one of the protection doors is closed; a first driving mechanism used for driving the outer protection door to open or close, and a second driving mechanism used for driving the inner protection door to open or close; and a control system comprising a controller electrically connected to the second driving mechanism and the first driving mechanism, separately, wherein the controller is used for controlling the operation of the second driving mechanism and the first driving mechanism and enabling the feeding protection device to form an interlock state in which at most one protection door is opened. A discharge port, a discharge tube, a valve, and a collection box are provided on one side wall of the feeding channel. The valve can be opened periodically to discharge powder falling inside the feeding channel and the powder is collected in the collection box. The glass kiln comprises the feeding protection device. The feeding body is fixedly connected to the glass kiln, and the inner end of the feeding channel directly faces and is in communication with a feeding port of the glass kiln.

Description

A feeding protection device for a glass furnace and a glass furnace containing the device.

[0001] This application claims priority to Chinese Patent Application No. 202411740317.9, filed on November 29, 2024, entitled "A Feeding Protection Device for a Glass Furnace and a Glass Furnace Including the Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention belongs to the technical field of glass production, specifically relating to a feeding protection device for a glass furnace and a glass furnace containing the device. Background Technology

[0003] Glass furnaces are essential equipment in glass manufacturing, primarily used to melt glass raw materials to obtain molten glass for processing. During glass production, to ensure a continuous supply of molten glass, raw materials need to be replenished periodically. Currently, as shown in Figure 1, this is typically done manually using a ladle 1 to scoop the material, opening the furnace door 3 on the side of the furnace 2, and then horizontally inserting the ladle head into the furnace through the feeding port. Finally, the ladle is horizontally flipped to complete the feeding. To reduce manual labor intensity and improve production safety, some systems utilize mechanical structures to replace manual ladle operation for feeding, such as the substrate glass furnace feeding machine positioning device disclosed in Chinese Patent CN108285262B. This design fixes the ladle handle to a trolley that moves towards the feeding port. The trolley drives the ladle, and in conjunction with the intermittent opening of the feeding port, the ladle extends into the furnace and flips to complete the feeding.

[0004] However, whether the feeding scoop is driven manually or mechanically, the feeding port and the gap between the feeding port and the scoop will connect the inside of the kiln with the external environment during the feeding process. Since the inside of the kiln is under positive pressure, the connection with the external environment will not only cause pressure fluctuations and temperature drops in the kiln, but also cause the powder in the scoop to be thrown out, resulting in loss of batch materials and affecting the composition of the molten glass. Sudden changes in pressure and temperature in the kiln, as well as instability in glass composition, will not only affect the kiln process and the quality of the produced glass, but also lead to increased production costs and energy waste. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a feeding protection device for a glass furnace and a glass furnace containing the device, so as to solve the technical problem that the feeding process of the glass furnace is prone to cause changes in the pressure and temperature inside the furnace, thereby achieving the effect of improving glass quality and saving costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A feeding protection device for a glass furnace includes a feeding body with a through feeding channel. The feeding channel has an inner end for connecting to the inside of the furnace and an outer end for connecting to the external environment. The inner and outer ends of the feeding channel are respectively provided with an inner protective door and an outer protective door. The feeding channel is open when both the inner and outer protective doors are open and blocked when at least one protective door is closed. The outer protective door has a clearance structure. After the scoop head of the scoop enters the feeding channel, the outer protective door can be closed and opened by avoiding the scoop handle through the clearance structure. When the outer protective door is closed, the clearance structure slides with the scoop handle to seal the feeding channel.

[0008] Furthermore, the outer protective door includes two outer doors distributed along one side of the feeding channel. The outer doors adopt a swing-open or push-pull opening and closing method, and the opposite ends of the two outer doors move away from each other and come closer together to abut, respectively corresponding to the opening and closing of the outer protective door. The clearance structure includes clearance notches located at the opposite ends of the two outer doors. When the opposite ends of the two outer doors come closer together to abut, the clearance notches on the two outer doors are spliced ​​together to form a clearance hole. The clearance hole is used to slide with the spoon handle to seal the feeding channel.

[0009] Furthermore, the outer doors adopt a push-pull opening and closing method, and the two outer doors are respectively connected to a first drive mechanism, which is used to drive the two outer doors to move away from each other and move closer together.

[0010] Furthermore, the feeding channel has an outwardly penetrating limiting opening on one side wall. The inner protective door is located inside the limiting opening and is slidably engaged. The inner protective door is opened and closed by sliding along the penetrating direction of the limiting opening. The outer end of the inner protective door is connected to a second driving mechanism, which is used to drive the inner protective door to slide.

[0011] Furthermore, the feeding protection device also includes a control system, which includes a controller electrically connected to the second drive mechanism and the first drive mechanism respectively. The controller is used to control the operation of the second drive mechanism and the first drive mechanism and to enable the feeding protection device to form an interlocked state in which at most one protection door is open.

[0012] Furthermore, the control system includes a pressure sensor installed on the side wall of the feeding channel. The detection end of the pressure sensor is opposite to the inner protective door and is used to detect whether the inner protective door is closed. The pressure sensor is electrically connected to the controller. The controller can control the first drive mechanism to drive the outer protective door to open only when the pressure sensor is triggered. The control system also includes two limit switches corresponding to the two outer doors. When the outer door is closed, the corresponding limit switch is triggered. The limit switch is electrically connected to the controller. The controller can control the second drive mechanism to drive the inner protective door to open only when both limit switches are triggered, so that the feeding protection device forms an interlocked state in which at most one protective door is open.

[0013] Furthermore, a discharge port is provided on one side wall of the feeding channel, and a valve is provided at the discharge port.

[0014] Furthermore, the discharge port is located on the bottom surface of the feeding channel, which has a tapered shape and is recessed towards the outside of the feeding channel. The discharge port is located at the lowest point of the recess on the bottom surface of the feeding channel.

[0015] Furthermore, the feed body is provided with a collection box, and the discharge port also includes a discharge pipe. The collection box is detachably connected to the discharge port through the discharge pipe.

[0016] Furthermore, the valve is installed on the discharge pipe, and an insertion port is radially opened on one side of the discharge pipe. The valve includes an insertion plate, which is located inside the insertion port and slidably engaged. A third driving mechanism is connected to the outer end of the insertion plate. The third driving mechanism is used to drive the insertion plate to slide, so as to open and close the valve.

[0017] The present invention also includes a glass furnace, wherein the glass furnace includes the feeding protection device of the glass furnace as described above, the feeding body is fixedly connected to the glass furnace, and the inner end of the feeding channel is directly connected to the feeding port of the glass furnace.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The feeding protection device described in this invention is used in glass kilns. The feeding channel, inner protective door, and outer protective door work together to isolate the inside of the kiln from the external environment. This ensures that the inside of the kiln remains isolated from the external environment throughout the feeding process, and is only briefly connected to the feeding channel. This not only effectively reduces the pressure and heat loss inside the kiln during feeding, thereby reducing pressure fluctuations and temperature drops inside the kiln, but also reduces the amount of powder thrown out of the scoop.

[0020] 2. The feeding protection device of the present invention is used in glass kilns. Through the cooperation of a controller, a pressure sensor and a limit switch, the second drive mechanism and the first drive mechanism are interlocked to prevent the kiln interior from communicating with the external environment through the feeding channel due to misoperation during the feeding process. This helps to improve the reliability of the operation of the feeding protection device.

[0021] 3. The feeding protection device described in this invention is used in glass kilns. By setting up a discharge port, discharge pipe, valve and collection box, the valve can be opened periodically to discharge the powder that has spilled into the feeding channel and collect it into the collection box. This not only avoids the accumulation of powder in the feeding channel from affecting the feeding, but also facilitates the recycling and reuse of the powder. Attached Figure Description

[0022] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0023] Figure 1 is a schematic diagram of the current feeding method for glass furnaces in the background technology;

[0024] Figure 2 is a perspective view of the feeding protection device of the glass furnace described in the embodiment;

[0025] Figure 3 is a front view of the feeding protection device of the glass furnace described in the embodiment;

[0026] The components include: 1. Material spoon; 2. Glass furnace; 3. Feeding port / furnace door; 4. Feeding body; 5. Feeding channel; 6. Inner protective door; 7. Outer protective door; 8. Outer door; 9. Clearance notch; 10. Limiting port; 11. Traction rope; 12. Second drive mechanism; 13. First drive mechanism; 14. Pressure sensor; 15. Limit switch; 16. Discharge port; 17. Valve; 18. Discharge pipe; 19. Collection box; 20. Insertion plate; and 21. Third drive mechanism. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] Example:

[0029] Please refer to Figures 2 and 3. A feeding protection device for a glass kiln includes a feeding body 4 with a through feeding channel 5. The feeding channel 5 has an inner end for connecting to the inside of the kiln and an outer end for connecting to the external environment. The inner and outer ends of the feeding channel 5 are respectively provided with an inner protective door 6 and an outer protective door 7. The feeding channel 5 is open when both the inner protective door 6 and the outer protective door 7 are open and blocked when at least one protective door is closed. The outer protective door 7 has a clearance structure so that after the spoon head of the scoop enters the feeding channel 5, the outer protective door 7 can close and open by avoiding the handle of the scoop through the clearance structure. When the outer protective door 7 is closed, it slides with the handle to seal the clearance structure.

[0030] The feeding protection device of the present invention is installed on the glass furnace during use, with the inner end of the feeding channel 5 directly connected to the feeding port of the glass furnace. The original feeding port furnace door is removed or kept open. The clearance structure allows the outer protection door 7 to close and open without the handle of the scoop after the scoop head enters the feeding channel 5, and the outer protection door 7 slides and seals with the scoop handle when closed. When no material is being fed, the inner protection door 6 is kept closed to isolate the inside of the furnace from the external environment. The feeding process is as follows: Open the outer protective door 7, and horizontally insert the scoop into the feeding channel 5. After the scoop head enters the feeding channel 5, close the outer protective door 7 to allow the sliding seal between the scoop handle and the outer protective door 7, which blocks the feeding channel 5 from the external environment. Then, open the inner protective door 6 to connect the feeding channel 5 with the kiln interior through the feeding port. Further insert the scoop and allow the scoop head to enter the kiln interior. Flip the scoop to add powder into the kiln interior. Withdraw the scoop outward and return the scoop head to the feeding channel 5. Then, close the inner protective door 6 to isolate the kiln interior from the feeding channel 5. Finally, open the outer protective door 7 to connect the feeding channel 5 with the external environment and completely withdraw the scoop from the feeding channel 5.

[0031] The feeding protection device described in this invention is used in glass furnaces. The feeding channel 5, inner protective door 6, and outer protective door 7 work together to isolate the inside of the furnace from the external environment, ensuring that the inside of the furnace remains isolated from the external environment throughout the entire feeding process, only briefly connected to the feeding channel 5. This effectively reduces pressure and heat loss inside the furnace during feeding, thereby reducing pressure fluctuations and temperature drops. Furthermore, the feeding body 4 is installed on the glass furnace, and the temperature inside the feeding channel increases due to heat transfer, increasing the pressure inside the channel and making it closer to the furnace pressure than the external environment. When the feeding channel 5 is connected to the inside of the furnace, the airflow generated by the release of furnace pressure is relatively weak, thus reducing the amount of powder thrown out of the scoop. Therefore, this invention effectively solves the problem of pressure and temperature fluctuations during the feeding process in glass furnaces, which is beneficial for maintaining stable glass composition, improving glass quality, reducing energy consumption, and lowering production costs.

[0032] In this embodiment, the two ends of the feeding channel 5 are the two ends in the length direction. The thickness direction of the inner protective door 6 and the outer protective door 7 corresponds to the length direction of the feeding channel 5. The length and width dimensions of the inner protective door 6 and the outer protective door 7 are adapted to the cross-sectional dimensions of the feeding channel 5. In implementation, the inner protective door 6 and the outer protective door 7 can be set on the feeding body 4 or installed outside the feeding body 4, as long as they can close and block the feeding channel 5. The specific structural form is not limited. The feeding channel 5 should be minimized as much as possible while allowing the scoop head to stop, so as to further reduce the impact on the pressure and temperature inside the furnace during feeding. In order to improve the effect of the inner protective door 6 in blocking the feeding channel 5 and isolating the inside of the kiln from the feeding channel 5 when closed, a sealing strip can be installed on the inner protective door 6 at the position that matches the feeding channel 5. In order to improve the effect of the outer protective door 7 in blocking the feeding channel 5 and isolating the feeding channel 5 from the external environment when closed, a sealing strip can be installed on the outer protective door 7 at the position that matches the feeding channel 5 and a sealing strip can be installed in the clearance notch 9 of the outer door 8.

[0033] Please refer to Figures 2 and 3. The outer protective door 7 includes two outer doors 8 distributed along one side of the feeding channel 5. The outer doors 8 adopt a swing-open or push-pull opening and closing method. The opposite ends of the two outer doors 8 are far apart and close together, respectively, corresponding to the opening and closing of the outer protective door 7. The clearance structure includes clearance notches 9 located at the opposite ends of the two outer doors 8. When the opposite ends of the two outer doors 8 are close together, the clearance notches 9 on the two outer doors 8 are spliced ​​to form a clearance hole. The clearance hole is used for sliding sealing cooperation with the spoon handle.

[0034] In another embodiment, the outer protective door 7 can also be a single door panel. A notch is provided on one side of the outer protective door 7, extending to the middle of the outer protective door 7. A baffle that can be squeezed inward by the spoon handle is provided on one or both sides of the notch. The baffle extends from the side where the notch is located close to the middle of the outer protective door 7. When the baffle is in the pop-out state, the outer protective door 7 is only open in the middle to allow the spoon handle to pass through and maintain a sliding seal. In this embodiment, the outer protective door 7 adopts two outer doors 8. When the two outer doors 8 are closed and opened, they avoid the spoon handle through the clearance notch 9. When closed, they slide and seal with the spoon handle through the clearance hole formed by the two clearance notches 9. Compared with the above-mentioned form of a single door panel with a notch and a baffle, the structure is not only simpler and more reliable, but also the outer protective door 7 does not exert any force on the spoon handle when the outer protective door 7 is opened and closed, which can avoid affecting the operation of the spoon.

[0035] Please refer to Figures 2 and 3. The outer door 8 adopts a push-pull opening and closing method. The two outer doors 8 are respectively connected to the first drive mechanism 13. The first drive mechanism 13 is used to drive the two outer doors 8 to move away from each other and move closer together. In this embodiment, the ends of the two outer doors 8 that move away from each other are respectively connected to cylinders as the first drive mechanism 13. The two outer doors 8 are located outside the feeding body 4 and are opened and closed by means of a door frame with a sliding groove (not shown in the figure). The side of the outer door 8 facing the feeding body 4 is flush with the side where the outer end of the feeding channel 5 is located. In this way, after the two outer doors 8 move closer together, the side of the outer door 8 facing the feeding body 4 and the side where the outer end of the feeding channel 5 is located are sealed together to block the feeding channel 5.

[0036] Please refer to Figure 2. The feeding channel 5 has an outwardly penetrating limiting opening 10 on one side wall. The inner protective door 6 is located inside the limiting opening 10 and is slidably engaged. The inner protective door 6 is opened and closed by sliding along the penetrating direction of the limiting opening 10. The outer end of the inner protective door 6 is connected to a second driving mechanism 12, which is used to drive the inner protective door 6 to slide. In this embodiment, when in use, the limiting opening 10 faces upward, and the outer end of the inner protective door 6 is connected to a traction device (not shown in the figure) through a traction rope 11. The traction device is fixedly set and serves as the second driving mechanism 12, so that the inner protective door 6 remains closed under the action of gravity.

[0037] In this embodiment, the feeding protection device further includes a control system. The control system includes a controller electrically connected to the second drive mechanism 12 and the first drive mechanism 13 respectively. The controller is used to control the operation of the second drive mechanism 12 and the first drive mechanism 13, and to make the feeding protection device form an interlocked state in which at most one protection door is open. In this way, the second drive mechanism 12 and the first drive mechanism 13 are interlocked through the control system, which avoids the situation where the inside of the kiln is connected to the external environment through the feeding channel 5 due to misoperation during the feeding process, which helps to improve the reliability of the operation of the feeding protection device.

[0038] Please refer to Figure 3. The control system includes a pressure sensor 14 installed on the side wall of the feeding channel 5. The detection end of the pressure sensor 14 is opposite to the inner protective door 6 and is used to detect whether the inner protective door 6 is closed. The pressure sensor 14 is electrically connected to the controller. The controller can control the first drive mechanism 13 to drive the outer protective door 7 to open only when the pressure sensor 14 is triggered. The control system also includes two limit switches 15 corresponding to the two outer doors 8. When the outer door 8 is closed, the corresponding limit switch 15 is triggered. The limit switch 15 is electrically connected to the controller. The controller can control the second drive mechanism 12 to drive the inner protective door 6 to open only when both limit switches 15 are triggered, so that the feeding protection device forms an interlocked state where at most one protective door is open. In this way, by setting the pressure sensor 14 and the limit switch 15, the control system not only enables the second drive mechanism 12 and the first drive mechanism 13 to open, but also enables the second drive mechanism 12 and the first drive mechanism 13 to open. The actuator 13 is interlocked. Simultaneously, the pressure sensor 14 and limit switch 15 can be used to provide feedback on whether the inner protective door 6 and outer protective door 7 are completely closed, ensuring that the kiln interior remains isolated from the external environment during feeding, thus improving the reliability of the feeding protection device. In implementation, the pressure sensor 14 can be positioned near the limit port 10, and a horizontally protruding trigger part is provided near the lower end of the inner protective door 6. When the inner protective door 6 rises and opens, the trigger part activates the pressure sensor 14, allowing the pressure sensor 14 to detect the state of the inner protective door 6 without affecting its opening or closing. In this embodiment, the pressure sensor 14 is embedded in the side wall of the feeding channel 5 and faces the inner end of the inner protective door 6. It is triggered when the inner protective door 6 is closed. A sealing gasket can be provided at the inner end of the inner protective door 6 or on the opposite side wall of the feeding channel 5 to ensure sealing.

[0039] Please refer to Figure 3. A discharge port 16 is provided on one side wall of the feeding channel 5, and a valve 17 is provided at the discharge port 16. In this way, due to the certain pressure and temperature difference between the feeding channel 5 and the inside of the kiln, powder will inevitably be scattered into the feeding channel 5 after the inner protective door 6 is opened during the feeding process. When the feeding protection device is in use, the discharge port 16 faces downward and the valve 17 can be opened periodically to discharge the powder accumulated in the feeding channel 5. This not only avoids the accumulation of powder in the feeding channel 5 from affecting the feeding, but also facilitates the recycling and reuse of the powder.

[0040] The side wall of the feeding channel 5 where the discharge port 16 is located is tapered and recessed towards the outside of the feeding channel 5. The discharge port 16 is located at the lowest point of the side wall of the feeding channel 5. In this way, the powder spilled in the feeding channel 5 will automatically gather towards the discharge port 16 under the action of gravity, so that all the powder in the feeding channel 5 can be discharged quickly after the valve 17 is opened.

[0041] Please refer to Figures 2 and 3. The feeding body 4 is provided with a collection box 19. The collection box 19 is connected to the discharge port 16 through the discharge pipe 18. In this embodiment, the discharge pipe 18 is fixedly connected to the feeding body 4 and detachably connected to the collection box 19. In this way, the powder discharged through the discharge port 16 is collected into the collection box 19 through the discharge pipe 18. The collection box 19 is detachably connected to the discharge pipe 18 so that the collection box 19 can be disassembled periodically for powder recycling and reuse.

[0042] Please refer to Figures 2 and 3. The valve 17 is installed on the discharge pipe 18. An insertion port is radially opened on one side of the discharge pipe 18. The valve 17 includes an insertion plate 20, which is located inside the insertion port and slidably engaged. A third driving mechanism 21 is connected to the outer end of the insertion plate 20. The third driving mechanism 21 is used to drive the insertion plate 20 to slide, thereby opening and closing the valve 17. In this embodiment, a cylinder is connected to the outer end of the insertion plate 20 as the third driving mechanism 21. In practice, the third driving mechanism 21 can be electrically connected to the controller, and a simple program can be designed for the controller so that after each triggering of the pressure sensor 14, the valve 17 is opened for a period of time through the third driving mechanism 21, so as to transfer the powder spilled in the feeding channel 5 during the current feeding process to the collection box 19 in a timely manner, thereby preventing the powder spilled in the feeding channel 5 from being scattered in the next feeding process, thereby improving the recovery rate of the spilled powder.

[0043] When the feeding protection device of the glass furnace described in this invention is used in a glass furnace, the feeding body 4 is fixedly connected to the glass furnace, and the inner end of the feeding channel 5 is directly connected to the feeding port of the glass furnace. The glass furnace equipped with the feeding device can also be linked with the mechanical structure for driving the feeding spoon. The power source of the mechanical structure is electrically connected to the controller. The controller can preset the time interval between two feedings, the time required for the spoon head to enter the feeding channel 5, and the total time for the spoon head to enter the furnace, turn over to pour material, and return to the feeding channel 5. This allows the mechanical structure for driving the feeding spoon to cooperate with the feeding device to automatically complete the periodic feeding action, which is beneficial to improve the automation level of production and reduce the intensity of manual labor.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A feeding protection device for a glass furnace, characterized in that: The device includes a feeding body with a through feeding channel. The feeding channel has an inner end for connecting to the inside of the kiln and an outer end for connecting to the external environment. The inner and outer ends of the feeding channel are respectively provided with an inner protective door and an outer protective door. The feeding channel is open when both the inner and outer protective doors are open and blocked when at least one protective door is closed. The outer protective door has a clearance structure. After the scoop head of the scoop enters the feeding channel, the outer protective door can be closed and opened by the clearance structure avoiding the scoop handle. When the outer protective door is closed, the clearance structure slides with the scoop handle to seal the feeding channel.

2. The feeding protection device for a glass furnace according to claim 1, characterized in that: The outer protective door includes two outer doors distributed along one side of the feeding channel. The outer doors open and close in a swing or push-pull manner, and the opposite ends of the two outer doors move away from each other and come closer together, respectively corresponding to the opening and closing of the outer protective door. The clearance structure includes clearance notches located at the opposite ends of the two outer doors. When the opposite ends of the two outer doors come closer together, the clearance notches on the two outer doors are joined together to form a clearance hole. The clearance hole is used to slide with the spoon handle to seal the feeding channel.

3. The feeding protection device for a glass furnace according to claim 2, characterized in that: The outer doors are opened and closed by pushing and pulling. Each of the two outer doors is connected to a first drive mechanism, which is used to drive the two outer doors to move away from each other and move closer together.

4. The feeding protection device for a glass furnace according to claim 3, characterized in that: The feeding channel has an outwardly penetrating limiting opening on one side wall. The inner protective door is located inside the limiting opening and is slidably engaged. The inner protective door is opened and closed by sliding along the penetrating direction of the limiting opening. The outer end of the inner protective door is connected to a second driving mechanism, which is used to drive the inner protective door to slide.

5. The feeding protection device for a glass furnace according to claim 4, characterized in that: The feeding protection device also includes a control system, which includes a controller electrically connected to the second drive mechanism and the first drive mechanism respectively. The controller is used to control the operation of the second drive mechanism and the first drive mechanism and to make the feeding protection device form an interlocked state in which at most one protection door is open.

6. The feeding protection device for a glass furnace according to claim 5, characterized in that: The control system includes a pressure sensor mounted on the side wall of the feeding channel. The detection end of the pressure sensor is opposite to the inner protective door and is used to detect whether the inner protective door is closed. The pressure sensor is electrically connected to the controller. The controller can control the first drive mechanism to drive the outer protective door to open only when the pressure sensor is triggered. The control system also includes two limit switches corresponding to the two outer doors. When the outer door is closed, the corresponding limit switch is triggered. The limit switch is electrically connected to the controller. The controller can control the second drive mechanism to drive the inner protective door to open only when both limit switches are triggered, so that the feeding protection device forms an interlocked state in which at most one protective door is open.

7. The feeding protection device for a glass furnace according to claim 1, characterized in that: A discharge port is provided on one side wall of the feeding channel, and a valve is provided at the discharge port.

8. The feeding protection device for a glass furnace according to claim 7, characterized in that: The side wall of the feeding channel where the discharge port is located is tapered and recessed towards the outside of the feeding channel, and the discharge port is located at the lowest point of the side wall of the feeding channel.

9. The feeding protection device for a glass furnace according to claim 7, characterized in that: The feed body is provided with a collection box, and the discharge port also includes a discharge pipe. The collection box is detachably connected to the discharge port through the discharge pipe.

10. The feeding protection device for a glass furnace according to claim 9, characterized in that: The valve is mounted on the discharge pipe, and an insertion port is radially opened on one side of the discharge pipe. The valve includes an insertion plate, which is located inside the insertion port and slidably engaged. A third driving mechanism is connected to the outer end of the insertion plate, which is used to drive the insertion plate to slide, so as to open and close the valve.

11. A glass furnace, characterized in that: The device includes a feeding protection device for a glass furnace as described in any one of claims 1-10, wherein the feeding body is fixedly connected to the glass furnace, and the inner end of the feeding channel is directly connected to the feeding port of the glass furnace.

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