Feeding protection device of glass kiln and glass kiln comprising same

Abstract

The invention discloses a feeding protection device of a glass kiln and the glass kiln comprising the feeding protection device, and the feeding protection device is used for the cooperation of the glass kiln, a feeding channel, an inner protection door and an outer protection door, and plays a blocking role between the interior of the kiln and the external environment. The interior of the kiln is always isolated from the external environment in the whole feeding process and is only transiently communicated with the feeding channel, so that the pressure and heat loss in the kiln during feeding can be effectively reduced, and the pressure fluctuation and temperature reduction in the kiln are reduced; besides, the feeding body is mounted on the glass kiln, and the pressure and the temperature in the feeding channel are far higher than those in the external environment due to heat transfer, so that when the feeding channel is communicated with the interior of the kiln, the situation that powder in the material spoon is raised outwards is reduced; therefore, the invention can effectively solve the problem that the pressure and temperature in the furnace are easy to change in the charging process of the glass furnace at present, and is beneficial to keeping the glass component stable, improving the glass quality, reducing the energy consumption and lowering the production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of glass production, and in particular relates to a feeding protection device for a glass furnace and a glass furnace containing the device. Background Art

[0002] Glass kilns are necessary equipment for making glass. They are mainly used to melt glass raw materials and obtain molten glass for production and processing. In the glass production process, in order to ensure that the glass kiln continues to supply molten glass, it is necessary to regularly replenish raw materials into the glass kiln. Figure 1 As shown, generally, a material spoon 1 is used to manually hold the material, the charging port door 3 on the side of the glass furnace 2 is opened, and then the spoon head of the material spoon is extended into the furnace through the charging port, and finally the material spoon is horizontally turned over to complete the charging. In order to reduce the labor intensity of manual labor and improve production safety, some mechanical structures are used to replace the manual operation of the material spoon to complete the charging, such as the substrate glass furnace charging machine positioning device disclosed in Chinese patent CN108285262B. This solution fixes the spoon handle of the material spoon on a trolley that can move toward the charging port. The trolley drives the material spoon and cooperates with the intermittent opening of the charging port to allow the material spoon to be extended into the furnace and turned over to complete the charging.

[0003] However, no matter whether the spoon is driven manually or mechanically, during the feeding process, the feeding port and the gap between the feeding port and the spoon will connect the inside of the kiln with the external environment. Since the inside of the kiln is under positive pressure, the connection with the external environment will not only cause pressure fluctuations and temperature drop in the furnace, but also cause the powder in the spoon to fly out, thereby causing loss of batch materials and affecting the composition of the glass liquid. Sudden changes in pressure and temperature in the furnace, as well as unstable glass composition will not only affect the kiln process production process and the quality of the produced glass, but also lead to increased production costs and energy waste. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a feeding protection device for a glass kiln and a glass kiln containing the device, so as to solve the technical problem that the pressure and temperature in the glass kiln are easily changed during the feeding process, thereby achieving the effect of improving the quality of glass and saving costs.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A feeding protection device for a glass kiln comprises a feeding body, the feeding body is provided with a feeding channel running through it, the two ends of the feeding channel are respectively an inner end for connecting to the inside of the kiln and an outer end for connecting to the external environment, the inner end and the outer end of the feeding channel are respectively provided with an inner protective door and an outer protective door, the feeding channel is connected when both the inner protective door and the outer protective door are opened, and is blocked when at least one of the protective doors is closed, the outer protective door is provided with a yield structure, after the spoon head of the feeding spoon enters the feeding channel, the outer protective door can be closed and opened by avoiding the spoon handle of the feeding spoon through the yield structure and can slide and seal with the spoon handle when closed.

[0006] Furthermore, the outer protection door includes two outer doors distributed laterally along one side of the feeding channel, the outer doors are opened and closed by flat opening or pushing and pulling, and the opposite ends of the two outer doors move away from and approach each other to correspond to the opening and closing of the outer protection door respectively, and the yield structure includes yield notches located at the opposite ends of the two outer doors. When the opposite ends of the two outer doors approach and abut, the yield notches on the two outer doors are spliced ​​to form a yield hole, and the yield hole is used to cooperate with the sliding seal of the spoon handle.

[0007] Furthermore, the outer door is opened and closed by pushing and pulling, and the two outer doors are respectively connected to a first driving mechanism, which is used to drive the two outer doors to move away from and towards each other.

[0008] Furthermore, a side wall of the feeding channel has a limiting opening extending outward, and the inner protective door is located in the limiting opening and slides together. The inner protective door is opened and closed by sliding along the direction of penetration of the limiting opening. The outer end of the inner protective door is connected to a second driving mechanism, and the second driving mechanism is used to drive the inner protective door to slide.

[0009] 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, and 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 interlocking state in which at most one protection door is open.

[0010] Furthermore, the control system includes a pressure sensor arranged on the side wall of the feeding channel, and the detection end of the pressure sensor is opposite to the inner protection door, and is used to detect whether the inner protection door is closed. The pressure sensor is electrically connected to the controller, and the controller can control the first drive mechanism to drive the outer protection door to open only when the pressure sensor is triggered; the control system also includes two travel switches corresponding to the two outer doors one by one, and the corresponding travel switch is triggered when the outer door is closed. The travel switch is electrically connected to the controller, and the controller can control the second drive mechanism to drive the inner protection door to open only when both travel switches are triggered, so that the feeding protection device forms an interlocking state in which at most one protection door is open.

[0011] Furthermore, a discharge port is provided on one side wall of the feeding channel, and a valve is provided at the discharge port.

[0012] Furthermore, the side wall of the feeding channel where the discharge port is located is tapered and recessed toward the outside of the feeding channel, and the discharge port is located at the lowest point of the side wall of the feeding channel.

[0013] Furthermore, a material collecting box is provided outside the feeding body, and the material collecting box is connected with the discharge port through a discharge pipe.

[0014] Furthermore, the valve is arranged on a 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 in the insertion port and slides together. A third driving mechanism is connected to the outer end of the insertion plate, and the third driving mechanism is used to drive the insertion plate to slide to open and close the valve.

[0015] The present invention also includes a glass furnace, which includes the feeding protection device of the glass furnace as described above, 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The feeding protection device of the present invention is used for a glass kiln. The feeding channel, the inner protection door and the outer protection door cooperate to play a barrier role between the inside of the kiln and the external environment, so that the inside of the kiln is always isolated from the external environment during the entire feeding process and is only briefly connected to the feeding channel. It can not only effectively reduce the pressure and heat loss inside the kiln during feeding, thereby reducing the pressure fluctuation and temperature drop in the furnace, but also reduce the situation of powder in the feeding spoon flying out.

[0017] 2. The feeding protection device of the present invention is used for a glass kiln. Through the cooperation of a controller, a pressure sensor and a travel switch, the second drive mechanism and the first drive mechanism are interlocked to avoid the situation in which the inside of the kiln is connected to the external environment through the feeding channel due to misoperation during the feeding process, which is beneficial to improving the reliability of the operation of the feeding protection device.

[0018] 3. The feeding protection device of the present invention is used for a glass kiln. By arranging a discharge port, a discharge pipe, a valve and a collection box, the valve can be opened regularly to discharge the powder spilled in the feeding channel and collect it in the collection box. This can not only avoid the accumulation of powder in the feeding channel to affect the feeding, but also facilitate the recycling and reuse of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the feeding method in front of a glass furnace in the current background technology; Figure 2 A three-dimensional diagram of a feeding protection device for a glass furnace according to an embodiment; Figure 3It is a front view of the feeding protection device of the glass furnace described in the embodiment; Among them, there are a material spoon 1, a glass kiln 2, a feeding port furnace door 3, a feeding body 4, a feeding channel 5, an inner protective door 6, an outer protective door 7, an outer door 8, a clearance gap 9, a limit opening 10, a traction rope 11, a second driving mechanism 12, a first driving mechanism 13, a pressure sensor 14, a travel switch 15, a discharge port 16, a valve 17, a discharge pipe 18, a collecting box 19, an insertion plate 20, and a third driving mechanism 21. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Example: See also Figure 2 and Figure 3 A feeding protection device for a glass kiln comprises a feeding body 4, the feeding body 4 is provided with a feeding channel 5 which penetrates therethrough, the two ends of the feeding channel 5 are respectively an inner end for communicating with the inside of the kiln and an outer end for communicating with the external environment, the inner end and the outer end of the feeding channel 5 are respectively provided with an inner protection door 6 and an outer protection door 7, the feeding channel 5 is penetrated when both the inner protection door 6 and the outer protection door 7 are opened, and is blocked when at least one of the protection doors is closed, the outer protection door 7 is provided with a yield structure, so that after the spoon head of the material spoon enters the feeding channel 5, the outer protection door 7 can be closed and opened by avoiding the spoon handle of the material spoon through the yield structure, and when the outer protection door 7 is closed, it slides with the spoon handle to seal the yield structure.

[0022] The feeding protection device of the present invention is installed on a glass kiln when in use, and the inner end of the feeding channel 5 is connected to the feeding port of the glass kiln directly, the original feeding port furnace door is removed or kept open, and the yield structure allows the outer protection door 7 to avoid the handle of the material spoon and close and open after the spoon head of the material spoon enters the feeding channel 5, and the outer protection door 7 is slidably sealed with the spoon handle when closed; when no material is added, the inner protection door 6 is kept closed to separate the interior of the kiln from the external environment. The feeding process is as follows: open the outer protective door 7, extend the material spoon horizontally into the feeding channel 5, after the spoon head of the material spoon enters the feeding channel 5, close the outer protective door 7, and make way for the structure to slide and seal with the spoon handle of the material spoon. The outer protective door 7 blocks the feeding channel 5 from the external environment. At this time, open the inner protective door 6 to connect the feeding channel 5 with the inside of the kiln through the feeding port, further extend the material spoon and allow the spoon head to enter the inside of the kiln, flip the material spoon to add powder into the inside of the kiln, withdraw the material spoon outward and return the spoon head to the feeding channel 5, and then close the inner protective door 6 to separate the inside of the kiln 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 material spoon from the feeding channel 5.

[0023] The feeding protection device described in the present invention is used for a glass kiln. The feeding channel 5, the inner protection door 6 and the outer protection door 7 cooperate to play a barrier role between the inside of the kiln and the external environment, so that the inside of the kiln is always isolated from the external environment during the entire feeding process, and is only briefly connected to the feeding channel 5, which can effectively reduce the pressure and heat loss inside the kiln during feeding, thereby reducing the pressure fluctuation and temperature drop in the furnace; in addition, the feeding body 4 is installed on the glass kiln, and the temperature in the material channel increases due to heat transfer, so that the pressure in the material channel increases and is closer to the pressure in the furnace than the pressure of the external environment. When the feeding channel 5 is connected to the inside of the kiln, the airflow generated by the release of the pressure in the furnace is relatively weak, thereby reducing the situation of powder in the material spoon flying out; therefore, the present invention can effectively solve the problem that the pressure and temperature in the glass kiln are easily caused to change during the current feeding process, which is beneficial to maintaining the stability of glass components, improving glass quality, reducing energy consumption and reducing production costs.

[0024] 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, and the length and width of the inner protective door 6 and the outer protective door 7 are adapted to the cross-sectional size of the feeding channel 5; during implementation, the inner protective door 6 and the outer protective door 7 can be arranged on the feeding body 4, or installed outside the feeding body 4, and can close and block the feeding channel 5, and the specific structural form is not limited; the feeding channel 5 should minimize the space under the premise that the head of the feeding spoon can stay, so as to further reduce the influence on the pressure and temperature in 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 in the closed state, a sealing strip can be installed at the position of the inner protective door 6 cooperating with the feeding channel 5, and 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 in the closed state, a sealing strip can be installed at the position of the outer protective door 7 cooperating with the feeding channel 5 and in the clearance gap 9 of the outer door 8.

[0025] See also Figure 2 and Figure 3 The outer protection door 7 includes two outer doors 8 distributed along the side of the feeding channel 5. The outer door 8 is opened and closed by flat opening or pushing and pulling, and the opposite ends of the two outer doors 8 move away from each other and abut against each other, respectively corresponding to the opening and closing of the outer protection door 7. The yielding structure includes a yielding notch 9 located at the opposite ends of the two outer doors 8. When the opposite ends of the two outer doors 8 abut against each other, the yielding notches 9 on the two outer doors 8 are spliced ​​to form a yielding hole, which is used to slide and seal with the spoon handle.

[0026] In another embodiment, the outer protection door 7 may also be formed of a single door panel, a notch is provided on one side of the outer protection door 7 and the notch extends to the middle of the outer protection door 7, a baffle which can be squeezed inward by the spoon handle is provided on one side wall or both side walls of the notch, the baffle extends from the side where the notch is located close to the middle of the outer protection door 7, and when the baffle is in a pop-up state, only the middle part of the outer protection door 7 is penetrated to allow the spoon handle to pass through and maintain a sliding seal; in this embodiment, the outer protection door 7 adopts two outer doors 8, and the two outer doors 8 avoid the spoon handle through the clearance notch 9 when closing and opening, and slide and seal with the spoon handle through the clearance holes formed by the two clearance notches 9 when closing. Compared with the above-mentioned single door panel with a notch and a baffle, not only is the structure simpler and more reliable, but also when the outer protection door 7 is opened and closed, the outer protection door 7 has no force on the spoon handle, thereby avoiding affecting the operation of the material spoon.

[0027] See also Figure 2 and Figure 3 The outer door 8 is opened and closed by pushing and pulling, and the two outer doors 8 are respectively connected to the first driving mechanism 13, which is used to drive the two outer doors 8 to move away from and towards each other; in this embodiment, the ends of the two outer doors 8 that are away from each other are respectively connected to the cylinder as the first driving mechanism 13, and the two outer doors 8 are located outside the feeding body 4 and are opened and closed with the help of a door frame with a slide groove (not shown in the figure), and 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 are brought close to each other, the side of the outer door 8 facing the feeding body 4 is sealed with the side where the outer end of the feeding channel 5 is located to block the feeding channel 5.

[0028] See also Figure 2 A limiting opening 10 extending outward is provided on one side wall of the feeding channel 5, and the inner protection door 6 is located in the limiting opening 10 and slides together. The inner protection door 6 is opened and closed by sliding along the penetration direction of the limiting opening 10. The outer end of the inner protection door 6 is connected to a second driving mechanism 12, and the second driving mechanism 12 is used to drive the inner protection door 6 to slide. In this embodiment, when in use, the limiting opening 10 faces upward, and the outer end of the inner protection door 6 is connected to a traction device (not shown in the figure) through a traction rope 11. The traction device is fixedly arranged and serves as the second driving mechanism 12, so that the inner protection door 6 remains closed under the action of gravity.

[0029] In this embodiment, the feeding protection device also includes a control system, which includes a controller electrically connected to the second drive mechanism 12 and the first drive mechanism 13 respectively, and the controller is used to control the operation of the second drive mechanism 12 and the first drive mechanism 13, and make the feeding protection device form an interlocking state in which at most one protection door is open; in this way, the interlocking of the operation of the second drive mechanism 12 and the first drive mechanism 13 is achieved through the control system, thereby avoiding the situation in which the inside of the kiln is connected to the external environment through the feeding channel 5 due to misoperation during the feeding process, which is beneficial to improving the reliability of the operation of the feeding protection device.

[0030] See also Figure 3 The control system includes a pressure sensor 14 arranged on the side wall of the feeding channel 5, the detection end of the pressure sensor 14 is opposite to the inner protection door 6, and is used to detect whether the inner protection door 6 is closed. The pressure sensor 14 is electrically connected to the controller, and the controller can control the first drive mechanism 13 to drive the outer protection door 7 to open only when the pressure sensor 14 is triggered; the control system also includes two travel switches 15 corresponding to the two outer doors 8 one by one, and the corresponding travel switch 15 is triggered when the outer door 8 is closed. The travel switch 15 is electrically connected to the controller, and the controller can control the second drive mechanism 12 to drive the inner protection door 6 to open only when both travel switches 15 are triggered, so that the feeding protection device forms an interlocking state in which at most one protection door is opened; in this way, by arranging the pressure sensor 14 and the travel switch 15, not only the control system realizes the second drive mechanism 12 and the first drive mechanism The action of the structure 13 is interlocked. At the same time, the pressure sensor 14 and the travel switch 15 can also be used to feedback whether the inner protection door 6 and the outer protection door 7 are completely closed, so as to ensure that the inside of the kiln is always isolated from the external environment during the feeding process, which is beneficial to improving the reliability of the operation of the feeding protection device; when implemented, the pressure sensor 14 can be arranged near the limit opening 10, and a trigger portion with a transverse protrusion is arranged near the lower end of the inner protection door 6, so that when the inner protection door 6 rises and opens, the pressure sensor 14 is triggered by the trigger portion, so that the pressure sensor 14 can detect the state of the protection door 6 without affecting the opening and closing of the inner protection door 6; in this embodiment, the pressure sensor 14 is embedded in the side wall of the feeding channel 5 and is opposite to the inner end of the inner protection door 6. The inner protection door 6 is triggered when it is closed, and a sealing gasket can be arranged at the inner end of the inner protection door 6 or on the opposite side wall of the feeding channel 5 to ensure sealing.

[0031] See also Figure 3A 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; thus, due to the certain difference in pressure and temperature between the feeding channel 5 and the inside of the kiln, during the feeding process, after the inner protection door 6 is opened, powder will inevitably be scattered in the feeding channel 5; when the feeding protection device is in use, the discharge port 16 faces downward and the valve 17 can be opened regularly to discharge the powder accumulated in the feeding channel 5, which can not only avoid the accumulation of powder in the feeding channel 5 affecting the feeding, but also facilitate the recycling of the powder; The side wall of the feeding channel 5 where the discharge port 16 is located is tapered and recessed toward the outside of the feeding channel 5, and 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 automatically gathers toward the discharge port 16 under the action of gravity, so that all the powder in the feeding channel 5 can be quickly discharged after the valve 17 is opened.

[0032] See also Figure 2 and Figure 3 A collecting box 19 is provided outside the feeding body 4, and the collecting box 19 is connected to the discharge port 16 through a discharge pipe 18; in this embodiment, the discharge pipe 18 is fixedly connected to the feeding body 4 and detachably connected to the collecting box 19; in this way, the powder discharged through the discharge port 16 is collected into the collecting box 19 through the discharge pipe 18, and the collecting box 19 is detachably connected to the discharge pipe 18, so that the collecting box 19 can be regularly disassembled for powder recovery and reuse.

[0033] See also Figure 2 and Figure 3 The valve 17 is arranged on the discharge pipe 18, and 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 in the insertion port and slides together. The outer end of the insertion plate 20 is connected to a third driving mechanism 21, and the third driving mechanism 21 is used to drive the insertion plate 20 to slide so as to open and close the valve 17; in this embodiment, the outer end of the insertion plate 20 is connected to a cylinder as the third driving mechanism 21; during implementation, the third driving mechanism 21 can be electrically connected to the controller, and the controller can be simply programmed so that each time the pressure sensor 14 is triggered, the valve 17 is opened for a period of time through the third driving mechanism 21, so as to timely transfer the powder spilled in the feeding channel 5 during this feeding process to the collecting box 19, so as to avoid the powder spilled in the feeding channel 5 from being blown out during the next feeding process, thereby improving the recovery rate of the spilled powder.

[0034] When the feeding protection device of the glass kiln described in the present invention is used in the glass kiln, the feeding body 4 is fixedly connected to the glass kiln, and the inner end of the feeding channel 5 is directly connected to the feeding port of the glass kiln; the glass kiln equipped with the feeding device can also be linked with the mechanical structure for driving the material spoon, and the power source of the mechanical structure is electrically connected to the controller. The time interval between each two feedings, the time required for the spoon head to extend into the feeding channel 5, and the total time for the spoon head to extend into the kiln to flip and pour the material and return to the feeding channel 5 are preset in the controller. The mechanical structure for driving the material spoon can cooperate with the feeding device to automatically complete the periodic feeding action, which is beneficial to improving the degree of automation in production and reducing the intensity of manual labor.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A feeding protection device for a glass furnace, characterized in that: The utility model comprises a feeding body, which is provided with a feeding channel running through the feeding body, wherein two ends of the feeding channel are respectively an inner end for connecting with the inside of the kiln and an outer end for connecting with the external environment, an inner protective door and an outer protective door are respectively provided at the inner end and the outer end of the feeding channel, the feeding channel is connected when both the inner protective door and the outer protective door are opened, and is blocked when at least one of the protective doors is closed, and a yield structure is provided on the outer protective door, after the spoon head of the feeding spoon enters the feeding channel, the outer protective door can be closed and opened by avoiding the spoon handle of the feeding spoon through the yield structure and can slide and seal with the spoon handle when closed.

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 laterally along one side of the feeding channel. The outer doors are opened and closed by flat opening or pushing and pulling, and the opposite ends of the two outer doors move away from each other and abut against each other, respectively corresponding to the opening and closing of the outer protective door. The yield structure includes yield notches located at the opposite ends of the two outer doors. When the opposite ends of the two outer doors abut against each other, the yield notches on the two outer doors are spliced ​​to form a yield hole, and the yield hole is used to cooperate with the sliding seal of the spoon handle.

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

4. The feeding protection device for a glass furnace according to claim 3, characterized in that: A limiting opening extending outward is provided on one side wall of the feeding channel, and the inner protection door is located in the limiting opening and slides in cooperation therewith. The inner protection door is opened and closed by sliding along the direction through which the limiting opening penetrates. A second driving mechanism is connected to the outer end of the inner protection door, and the second driving mechanism is used to drive the inner protection 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, and the controller is used to control the actions of the second drive mechanism and the first drive mechanism, and to make the feeding protection device form an interlocking 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 arranged on the side wall of the feeding channel, and the detection end of the pressure sensor is opposite to the inner protection door, and is used to detect whether the inner protection door is closed. The pressure sensor is electrically connected to the controller, and the controller can control the first drive mechanism to drive the outer protection door to open only when the pressure sensor is triggered; the control system also includes two travel switches corresponding to the two outer doors one by one, and the corresponding travel switch is triggered when the outer door is closed. The travel switch is electrically connected to the controller, and the controller can control the second drive mechanism to drive the inner protection door to open only when both travel switches are triggered, so that the feeding protection device forms an interlocking state in which at most one protection 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 toward 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: A material collecting box is arranged outside the feeding body, and the material collecting box is connected with the material discharging port through a material discharging pipe.

10. The feeding protection device for a glass furnace according to claim 9, characterized in that: The valve is arranged on a 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 in the insertion port and slides together. A third driving mechanism is connected to the outer end of the insertion plate, and the third driving mechanism is used to drive the insertion plate to slide to open and close the valve.

11. A glass furnace, characterized in that: It comprises a feeding protection device for a glass furnace as described in any one of claims 1 to 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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