A type of sealed heating furnace observation window

Abstract

This utility model belongs to the technical field of furnace observation windows, specifically a sealed furnace observation window, including a furnace wall. A rectangular tube is inserted through one side of the furnace wall. The inner wall of the rectangular tube has a first sealing groove and a second sealing groove penetrating the bottom of the rectangular tube. A first window plate is inserted into the inner side of the first sealing groove, and a second window plate is inserted into the inner side of the second sealing groove. In actual use, the second window plate is used as the regular window plate, and the first window plate is used as an emergency window plate. When the second window plate is dirty, the operator can move the first window plate up and insert it into the inner side of the rectangular tube to isolate the furnace from the second window plate. The operator can then disassemble and clean the second window plate, insert it back into the inner side of the rectangular tube, and then reset the second window plate. The double-layer detachable window plate structure allows the observation window to be cleaned without stopping the equipment, without affecting the operator's normal use.

Description

Technical Field

[0001] This utility model belongs to the technical field of observation windows for heating furnaces, and specifically relates to a sealed observation window for heating furnaces. Background Technology

[0002] A closed heating furnace is an industrial device that achieves efficient heat transfer and precise control through a closed system. The heating furnace is equipped with an observation window for observing the heating process. The window is usually made of high-temperature resistant quartz or ceramic material. Traditional heating furnaces typically use a single-layer fixed transparent observation window that is directly embedded in the furnace wall opening.

[0003] Under high-temperature conditions, contaminants such as soot and slag easily accumulate on the inside of the observation window, leading to blurred vision. Currently, cleaning the observation window requires shutting down the furnace and cooling it down, which disrupts production continuity and is inconvenient due to frequent disassembly and reassembly. Furthermore, the lack of a spare window makes it difficult to quickly switch to a backup window in case of emergencies, posing a safety hazard. Some existing technologies use high-temperature resistant glass and air-blowing cleaning devices for surface cleaning, but these are complex and the cleaning effect is unsatisfactory. Therefore, a sealed observation window for the heating furnace is needed to solve these problems. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a sealed heating furnace observation window, which features convenient assembly and disassembly, does not affect processing, and is highly practical.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealed observation window for a heating furnace, comprising a heating furnace wall, wherein a rectangular tube is provided through one side of the heating furnace wall, and the inner wall of the rectangular tube is provided with a first sealing groove and a second sealing groove penetrating the bottom of the rectangular tube, wherein a first window plate is inserted into the inner side of the first sealing groove, and a second window plate is inserted into the inner side of the second sealing groove; the bottom of the inner wall of the first sealing groove is symmetrically provided with threaded arc grooves, and the bottom of the first window plate is rotatably connected to an external threaded cylinder, the external threaded cylinder being threadedly connected to the threaded arc grooves on both sides; the second sealing groove and the first sealing groove have the same structure, the first window plate and the second window plate have the same structure, and both the first window plate and the second window plate are made of transparent high-temperature resistant glass.

[0006] As a preferred technical solution for a sealed heating furnace viewing window of this utility model, high-temperature resistant rubber rings are symmetrically fixed to the inner walls of the wide sides of the first sealing groove, and the high-temperature resistant rubber rings are attached to the side walls of the first window plate; a first retaining ring is provided on one side of the inner ring of the high-temperature resistant rubber ring, and a second retaining ring is provided on one side of the outer ring of the high-temperature resistant rubber ring, and both the first retaining ring and the second retaining ring are fixedly connected to the inner wall of the first sealing groove.

[0007] As a preferred technical solution for a closed heating furnace observation window of this utility model, a T-shaped rotating groove is provided in the middle of the bottom surface of the first window plate, a connecting rod is fixed to the inner wall of the external threaded cylinder, and a rotating block is fixed to one end of the connecting rod. The rotating block is located inside the T-shaped rotating groove.

[0008] As a preferred technical solution for a closed heating furnace observation window of this utility model, the size of the first window plate is adapted to the inner size of the first sealing groove, and the size of the second window plate is adapted to the inner size of the second sealing groove.

[0009] As a preferred technical solution for the observation window of a sealed heating furnace according to this utility model, a buffer pad is fixed on the narrow inner wall of the first sealing groove, and the buffer pad is made of high temperature resistant elastic material.

[0010] As a preferred technical solution for a closed heating furnace viewing window of this utility model, the bottom edge of the rectangular tube is symmetrically provided with fixing plates, and multiple guide plates are fixed to the side wall of the fixing plates. The guide plates are located on the bottom side of the first window plate.

[0011] As a preferred technical solution for the observation window of a sealed heating furnace according to this utility model, the thickness of the high-temperature resistant rubber ring is greater than the thickness of the first retaining ring and the second retaining ring.

[0012] As a preferred technical solution for the observation window of a sealed heating furnace according to this utility model, the first window plate and the second window plate are arranged in parallel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This solution extends a rectangular tube on the furnace wall of the heating furnace by setting a rectangular tube and a window plate. A sealing groove is set on the inner wall of the tube, which runs through the bottom. The window plate is inserted into the inner side of the sealing groove to seal the rectangular tube. At the same time, the operator can observe the situation inside the heating furnace through the transparent high-temperature resistant glass window plate. The bottom of the window plate is fixed to the bottom of the rectangular tube by a threaded connection. When disassembling and replacing it, only the external thread ring needs to be turned, which is convenient for disassembly and assembly.

[0015] (2) This solution uses a first window plate and a second window plate. The second window plate, like the first, is threaded and fixedly inserted into the inner side of the second sealing groove. In actual use, the second window plate serves as the primary window plate, while the first window plate serves as an emergency window plate. During normal use, the first window plate moves downwards, leaving only its end inside the sealing groove (positioned by friction using rubber rings and buffer pads on the inner wall, preventing it from falling off), thus sealing the bottom of the sealing groove. The second window plate completely seals one end of the rectangular cylinder, allowing operators to observe the interior of the heating furnace through it. Furthermore, when the second window panel is dirty, the operator can move the first window panel up and insert it into the inside of the rectangular cylinder to isolate the heating furnace from the second window panel. The operator can then disassemble and clean the second window panel. During this process, the furnace interior can be observed normally through the first window panel. After cleaning, the second window panel can be inserted back into the rectangular cylinder, and then the first window panel can be reset. The first window panel is used infrequently and cleaned infrequently, so it can be cleaned after the heating operation is completed. The double-layer detachable window panel structure allows the observation window to be cleaned without stopping the equipment, without affecting the operator's normal use. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional sectional view of the rectangular frame, the first window panel, and the second window panel of this utility model.

[0019] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a three-dimensional sectional view of the rectangular frame of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Heating furnace wall; 2. Rectangular cylinder; 21. First sealing groove; 211. Threaded arc groove; 212. High-temperature resistant rubber ring; 213. First retaining ring; 214. Second retaining ring; 215. Buffer pad; 22. Second sealing groove; 3. First window plate; 31. T-shaped rotating groove; 32. Rotating block; 33. Connecting rod; 34. External threaded cylinder; 4. Second window plate; 5. Fixing plate; 51. Guide plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Reference Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides the following technical solution: a sealed heating furnace observation window, including a heating furnace wall 1. The heating furnace wall 1 is the furnace wall structure of common heating furnace equipment. The specific structure and operating principle of the heating furnace can refer to the existing sealed heating furnace equipment, which is a common existing technology, so it is not described in detail here. A rectangular tube 2 is provided through one side of the heating furnace wall 1. One end of the rectangular tube 2 extends outward. The inner wall of the rectangular tube 2 is provided with a first sealing groove 21 and a second sealing groove 22 that penetrate the bottom of the rectangular tube 2. A first window plate 3 is inserted into the inner side of the first sealing groove 21, and a second window plate 4 is inserted into the inner side of the second sealing groove 22. The extended rectangular tube 2 increases the distance between the window plate and the heat source of the heating furnace, which reduces the impact of high temperature to a certain extent.

[0026] The first window panel 3 and the second window panel 4 are both made of transparent high-temperature resistant glass, such as quartz or ceramic glass; the bottom of the inner wall of the first sealing groove 21 is symmetrically provided with threaded arc grooves 211, which is a simple circular threaded groove with the middle part cut off, retaining the arc groove structure on both sides, without affecting its threaded connection function.

[0027] The bottom of the first window plate 3 is rotatably connected to the external threaded cylinder 34. Multiple grooves can be provided on the bottom outer wall of the external threaded cylinder 34, which makes it convenient for operators to directly rotate the external threaded cylinder 34 manually. The external threaded cylinder 34 is threadedly connected to the threaded arc grooves 211 on both sides, which is stable and easy to disassemble and assemble.

[0028] The bottom center of the first window panel 3 is provided with a T-shaped rotating groove 31. A connecting rod 33 is fixed to the inner wall of the external threaded cylinder 34. A rotating block 32 is fixed to one end of the connecting rod 33. The rotating block 32 is located inside the T-shaped rotating groove 31. By limiting the T-shaped rotating groove 31, the rotation of the external threaded cylinder 34 does not affect the stable axial movement of the window panel.

[0029] Specifically, through the above technical solution, the operator extends a rectangular tube 2 through the existing furnace wall and connects it to the inside of the furnace. Two transparent window panels are inserted and fixed inside the extended rectangular tube 2. Both window panels are installed by threaded connection. When the window panels are dirty and affect observation, the operator can easily rotate the external threaded tube 34 to remove the window panels for cleaning. Compared with window panels fixed by welding or other methods, the cleaning operation is more convenient. At the same time, by extending the rectangular tube 2, the distance between the window panels and the center of the heat source of the furnace is increased, thereby improving the service life of the window panels.

[0030] Example 2

[0031] In another embodiment of this solution, refer to Figure 2 , Figure 4 and Figure 5 As shown, specifically, the second sealing groove 22 and the first sealing groove 21 have the same structure, the first window panel 3 and the second window panel 4 have the same structure, the first window panel 3 and the second window panel 4 are arranged in parallel, the inner walls of the wide sides of the first sealing groove 21 are symmetrically fixed with high temperature resistant rubber rings 212, after the window panel is inserted, the inner walls of the window panel are squeezed and adhered to the rubber rings to achieve a tight seal on the rectangular tube 2, the high temperature resistant rubber rings 212 adhere to the side walls of the first window panel 3; the size of the first window panel 3 is adapted to the inner size of the first sealing groove 21, so that the window panel and the rubber ring are squeezed stably and have sufficient friction, the size of the second window panel 4 is adapted to the inner size of the second sealing groove 22, the inner wall of the narrow side of the first sealing groove 21 is fixed with a buffer pad 215, the buffer pad 215 is made of high temperature resistant elastic material, the buffer pad 215 increases the friction of the window panel insertion, and at the same time can buffer the deformation and squeezing of the window panel caused by high temperature;

[0032] Specifically, through the above technical solution, by setting two easily detachable window plates, in daily use, the second window plate 4 is used as the commonly used window plate to seal the inside of the rectangular cylinder 2. The operator can see through the furnace through the second window plate 4. At this time, only the upper end of the first window plate 3 is left inside the first sealing groove 21. While not affecting the observation through the second window plate 4, it is positioned by the friction of the rubber ring and the buffer pad 215 so that it can seal the lower end of the first sealing groove 21 and be used as a spare window plate.

[0033] When the inner sidewall of the second window plate 4 becomes dirty, the operator can move the first window plate 3, which serves as a spare window plate, upwards and fully insert it into the inner side of the first sealing groove 21, and fix it with a threaded connection. Then, the second window plate 4 can be disassembled and cleaned. During the cleaning process, the operator can observe the condition inside the furnace through the first window plate 3. After cleaning, it is reinstalled inside the second sealing groove 22, and the first window plate 3 is reset. With the commonly used window plate and the spare window plate, the viewing window can be cleaned without stopping the machine, avoiding equipment shutdown from affecting production and reducing thermal cycle stress damage. In addition, the first window plate 3, as a spare window plate, can be inspected and cleaned when heating is finished and the equipment is stopped. The commonly used window plate and the spare window plate are cleaned in an orderly manner, improving the practicality of the heating furnace.

[0034] Reference Figure 1 As shown, specifically, the bottom edge of the rectangular tube 2 has symmetrical fixing plates 5, and multiple guide plates 51 are fixed to the side wall of the fixing plates 5. The guide plates 51 are located on the bottom side of the first window panel 3. There are four guide plates 51. The spacing between two adjacent guide plates 51 is adapted to the thickness of the window panel. When the window panel is disassembled later, it can be pulled out stably along the guide plates 51 to avoid the glass window panel being damaged by the force applied in the middle.

[0035] Reference Figure 5 As shown, specifically, a first retaining ring 213 is provided on one side of the inner ring of the high-temperature resistant rubber ring 212, and a second retaining ring 214 is provided on one side of the outer ring of the high-temperature resistant rubber ring 212. The two retaining rings are located on the inner and outer sides of the rubber ring. The first retaining ring 213 and the second retaining ring 214 are both fixedly connected to the inner wall of the first sealing groove 21. The thickness of the high-temperature resistant rubber ring 212 is greater than the thickness of the first retaining ring 213 and the second retaining ring 214. The rigid retaining rings are located on the inner and outer sides of the rubber ring. Because their thickness is less than that of the rubber ring, they do not affect the rubber ring's adhesion to the window panel for sealing and friction. At the same time, the rigid retaining rings prevent the rubber ring from being pulled and pulled by the window panel, thus avoiding it from falling off and improving the sealing stability.

[0036] The working principle and usage process of this utility model are as follows: When using the heating furnace, through the rectangular tube 2 set on the furnace wall, the operator inserts the spare first window plate 3 and the commonly used second window plate 4 into the first sealing groove 21 and the second sealing groove 22 inside the rectangular tube 2, respectively. The second window plate 4 is completely inserted into the second sealing groove 22 to seal the rectangular tube 2, and the end of the first window plate 3 is inserted into the first sealing groove 21 to seal the bottom of the groove. The operator can observe the condition inside the heating furnace through the second window plate 4. When the second window plate 4 is dirty, the operator can open the first... The window plate 3 is fully inserted into the first sealing groove 21 to seal the rectangular cylinder 2. Then, the second window plate 4 can be disassembled and cleaned by turning the threaded structure. During this process, the operator can observe the situation inside the furnace through the first window plate 3. After cleaning, the second window plate 4 is reinstalled, and the first window plate 3 is lowered and reset so that its end still seals the bottom of the first sealing groove 21. When the equipment stops running, the operator can check the condition of the first window plate 3 to decide whether to clean it. With the double window plate structure, the fire window can be cleaned without affecting the operation of the equipment, which is convenient.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A firedoor window for a closed heating furnace comprising a furnace wall, characterised in that: A rectangular tube is provided through one side of the heating furnace wall. The inner wall of the rectangular tube is provided with a first sealing groove and a second sealing groove that penetrate the bottom of the rectangular tube. A first window plate is inserted into the inner side of the first sealing groove, and a second window plate is inserted into the inner side of the second sealing groove. The bottom of the inner wall of the first sealing groove is symmetrically provided with threaded arc grooves, and the bottom of the first window plate is rotatably connected to an external threaded cylinder, which is threadedly connected to the threaded arc grooves on both sides. The second sealing groove has the same structure as the first sealing groove, and the first window panel and the second window panel have the same structure. Both the first window panel and the second window panel are made of transparent high-temperature resistant glass.

2. The fire observation window of a sealed heating furnace according to claim 1, characterized in that: High-temperature resistant rubber rings are symmetrically fixed to the inner walls of the wide sides of the first sealing groove, and the high-temperature resistant rubber rings are attached to the side walls of the first window plate. The high-temperature resistant rubber ring has a first retaining ring on one side of its inner ring and a second retaining ring on one side of its outer ring. Both the first retaining ring and the second retaining ring are fixedly connected to the inner wall of the first sealing groove.

3. The fire observation window of a sealed heating furnace according to claim 2, characterized in that: The bottom surface of the first window panel is provided with a T-shaped rotating groove in the middle. A connecting rod is fixed to the inner wall of the external threaded cylinder. A rotating block is fixed to one end of the connecting rod. The rotating block is located inside the T-shaped rotating groove.

4. The fire observation window of a sealed heating furnace according to claim 3, characterized in that: The dimensions of the first window panel are adapted to the inner dimensions of the first sealing groove, and the dimensions of the second window panel are adapted to the inner dimensions of the second sealing groove.

5. The fire observation window of a sealed heating furnace according to claim 4, characterized in that: A buffer pad is fixed to the narrow inner wall of the first sealing groove. The buffer pad is made of high-temperature resistant elastic material.

6. The fire observation window of a sealed heating furnace according to claim 5, characterized in that: The bottom edge of the rectangular tube has symmetrical fixing plates, and multiple guide plates are fixed to the side walls of the fixing plates. The guide plates are located on the bottom side of the first window plate.

7. The fire observation window of a sealed heating furnace according to claim 6, characterized in that: The thickness of the high-temperature resistant rubber ring is greater than the thickness of the first retaining ring and the second retaining ring.

8. The fire observation window of a sealed heating furnace according to claim 7, characterized in that: The first window panel and the second window panel are arranged in parallel.

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