Air return prevention device in toughening furnace

Abstract

The utility model discloses an anti-return air device in a toughening furnace, which comprises a mounting frame arranged at a feed port and a discharge port of the toughening furnace, a movable plate capable of moving up and down and a fixed plate are arranged on the side surface of the mounting frame outside the toughening furnace, the movable plate is arranged on the upper side of the fixed plate, an upper air cavity is arranged in the movable plate, and a lower air cavity is arranged in the upper air cavity. A hot air supply pipe set is arranged at the top of the fixing plate, a lower air cavity is formed in the fixing plate, and a lower air seal air outlet is formed in the bottom of the fixing plate and used for exhausting internal air upwards. According to the air return prevention device in the toughening furnace, the toughening furnace can be sealed through the movable plate, the movable plate can be continuously heated in a hot air introducing mode, heat loss of the inlet and outlet ends in the toughening furnace is reduced, air sealing can be conducted on the inlet and outlet of the toughening furnace through discharged hot air, air return can be effectively prevented, and therefore the temperature in the furnace is kept uniform, and the service life of the toughening furnace is prolonged. The processing quality of the glass is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of glass tempering furnace equipment, in particular to a backwind prevention device in a tempering furnace. Background Art

[0002] Physical glass tempering equipment heats the flat glass and then rapidly cools it, so that the surface of the cooled glass forms compressive stress and the inside of the glass forms tensile stress, thereby improving the strength of the glass and turning ordinary annealed glass into tempered glass. Since this tempering method does not change the chemical composition of the glass, it is called physical glass tempering equipment. The glass tempering unit mainly consists of four parts: the placing section, the convection heating section, the flat tempering section, and the taking section, as well as a high-pressure centrifugal fan, air supply duct, air collecting box, air circuit, electrical control cabinet, operating table, etc.

[0003] Tempering furnace backflow refers to the phenomenon that outside air enters the furnace, affecting the uniform temperature distribution in the furnace. Existing tempering furnaces prevent backflow by closing the furnace door after the glass enters the furnace body. However, after long-term use, the furnace door expands due to heat and creates gaps, which causes outside air to enter the furnace and generate backflow, affecting the uniform temperature in the furnace, and further affecting the glass processing quality, making it inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a device for preventing backflow in a tempering furnace. The tempering furnace can be sealed by a movable plate, and the movable plate can be continuously heated by passing hot air, thereby reducing the heat loss at the inlet and outlet ends of the tempering furnace. The exhausted hot air can seal the inlet and outlet of the tempering furnace, which can effectively prevent backflow, thereby maintaining a uniform temperature in the furnace and ensuring the processing quality of the glass. The utility model is easy to use and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for preventing backflow in a tempering furnace, comprising a mounting frame installed on the feed port and the discharge port of the tempering furnace, the mounting frame being located on the side of the outer side of the tempering furnace and being provided with a movable plate that can move up and down, and a fixed plate, the movable plate being located on the upper side of the fixed plate, an upper air cavity being opened inside the movable plate, a hot air supply duct group being provided on the top of the fixed plate, a lower air cavity being opened inside the fixed plate, and a lower air seal outlet being opened at the bottom of the fixed plate for discharging internal gas upward.

[0006] As a preferred technical solution of the utility model, a guide rail is provided on the side of the mounting frame, and the movable plate is slidably arranged on the guide rail.

[0007] As a preferred technical solution of the utility model, the mounting frame is provided with a hydraulic cylinder capable of driving the movable plate to move up and down.

[0008] As a preferred technical solution of the utility model, the hot air supply pipe group includes a hot air pipe connected to an external hot air device, and evenly distributed air outlet pipes are provided at the bottom of the hot air pipe, and the air outlet pipes are connected to the upper air cavity.

[0009] As a preferred technical solution of the utility model, an upper air-sealed air outlet for exhausting air downward is provided at the upper end of the side of the movable plate, the upper air-sealed air outlet is connected to the upper air cavity, and part of the gas discharged from the outlet pipe enters the upper air cavity, and the other part is discharged through the upper air-sealed air outlet.

[0010] As a preferred technical solution of the utility model, a plug plate capable of being inserted into the lower air cavity is provided at the bottom of the movable plate, and the plug plate is open at the top and bottom to connect the upper air cavity and the lower air cavity.

[0011] As a preferred technical solution of the utility model, a guide plate is provided at the upper end of the side surface of the fixing plate, and arc grooves are provided at the top and bottom of the guide plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The anti-backwind device in the tempering furnace of the utility model example can seal the tempering furnace by means of a movable plate, and can also continuously heat the movable plate by passing hot air, thereby reducing the heat loss at the inlet and outlet ends inside the tempering furnace, and the exhausted hot air can seal the inlet and outlet of the tempering furnace, which can effectively prevent backwind, thereby maintaining a uniform temperature in the furnace, ensuring the processing quality of the glass, and being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the hot air flow trajectory when the utility model is used.

[0017] In the figure: 1 mounting frame, 2 guide rails, 3 movable plate, 31 plug plate, 32 upper air cavity, 33 upper air-sealed air outlet, 4 hot air duct, 41 air outlet pipe, 5 hydraulic cylinder, 6 fixed plate, 61 lower air cavity, 62 lower air-sealed air outlet, 7 guide plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a device for preventing backflow in a tempering furnace, comprising a mounting frame 1 mounted at the feeding port and the discharging port of the tempering furnace, the mounting frame 1 is located on the side of the outer side of the tempering furnace and is provided with a movable plate 3 and a fixed plate 6 that can move up and down, the movable plate 3 is located on the upper side of the fixed plate 6, an upper air cavity 32 is opened inside the movable plate 3, a hot air supply duct group is provided on the top of the fixed plate 6, a lower air cavity 61 is opened inside the fixed plate 6, and a lower air-sealed air outlet 62 is opened at the bottom of the fixed plate 6 for discharging internal gas upward, and hot air enters the upper air cavity 32 and the lower air cavity 61 through the hot air duct 4 and the air outlet pipe 41, thereby heating the movable plate 3 and the fixed plate 6, and reducing the heat loss at the inlet and outlet ends inside the tempering furnace.

[0020] Furthermore, a guide rail 2 is provided on the side of the mounting frame 1 , and the movable plate 3 is slidably arranged on the guide rail 2 , which can guide the movable plate 3 .

[0021] Furthermore, a plug plate 31 capable of being inserted into the lower air cavity 61 is provided at the bottom of the movable plate 3, and the plug plate 31 is open at the top and bottom for connecting the upper air cavity 32 and the lower air cavity 61. A hydraulic cylinder 5 capable of driving the movable plate 3 to move up and down is provided on the mounting frame 1. After the glass enters the tempering furnace, the movable plate 3 is controlled by the hydraulic cylinder 5 to move downward along the guide rail 2, and the movable plate 3 drives the plug plate 31 to move downward, and the plug plate 31 is inserted into the lower air cavity 61 of the fixed plate 6.

[0022] Furthermore, the hot air supply pipe group includes a hot air pipe 4 connected to an external hot air device, and an evenly distributed air outlet pipe 41 is provided at the bottom of the hot air pipe 4, and the air outlet pipe 41 is connected to the upper air cavity 32. The hot air enters the upper air cavity 32 and the lower air cavity 61 through the hot air pipe 4 and the air outlet pipe 41, thereby heating the movable plate 3 and the fixed plate 6, thereby reducing the heat loss at the inlet and outlet ends inside the tempering furnace.

[0023] Furthermore, an upper air-sealed air outlet 33 for exhausting air downward is provided at the upper end of the side surface of the movable plate 3, the upper air-sealed air outlet 33 is connected to the upper air cavity 32, and a part of the gas discharged from the air outlet pipe 41 enters the upper air cavity 32, and the other part is discharged through the upper air-sealed air outlet 33. A guide plate 7 is provided at the upper end of the side surface of the fixed plate 6, and an arc groove is provided at the top and bottom of the guide plate 7; the hot air discharged from the air outlet pipe 41 is discharged downward through the upper air-sealed air outlet 33, guided by the guide plate 7 and then moves upward; the hot air in the upper air cavity 32 and the lower air cavity 61 is discharged upward through the lower air-sealed air outlet 62, guided and diverted by the guide plate 7 and then moves downward, thereby realizing air sealing, which can effectively prevent backflow; the exhausted hot air flows a second time on the outside of the mounting frame 1, which can improve the insulation effect of the movable plate 3 and the fixed plate 6.

[0024] When using:

[0025] After the glass enters the tempering furnace, the movable plate 3 is controlled by the hydraulic cylinder 5 to move downward along the guide rail 2, and the movable plate 3 drives the plug plate 31 to move downward, and the plug plate 31 is inserted into the lower air cavity 61 of the fixed plate 6. At this time, the upper air cavity 32 is connected with the lower air cavity 61, and the movable plate 3 and the fixed plate 6 seal the tempering furnace to prevent external air from entering the tempering furnace, thereby preventing backflow;

[0026] The hot air enters the upper air cavity 32 and the lower air cavity 61 through the hot air pipe 4 and the air outlet pipe 41, thereby heating the movable plate 3 and the fixed plate 6, and reducing the heat loss at the inlet and outlet ends of the tempering furnace;

[0027] like Figure 3 As shown, the hot air discharged from the outlet pipe 41 is discharged downward through the upper air seal outlet 33, and then moves upward after being guided by the guide plate 7;

[0028] The hot air in the upper air cavity 32 and the lower air cavity 61 is discharged upward through the lower air seal outlet 62, and then moves downward after being diverted by the guide plate 7, thereby achieving air sealing and effectively preventing backflow.

[0029] The exhausted hot air flows for a second time outside the mounting frame 1 , which can improve the heat preservation effect on the movable plate 3 and the fixed plate 6 .

[0030] The utility model can seal the tempering furnace by the movable plate 3, and can also continuously heat the movable plate 3 by passing hot air, thereby reducing the heat loss at the inlet and outlet ends of the tempering furnace. The exhausted hot air can seal the inlet and outlet of the tempering furnace, which can effectively prevent backflow, thereby maintaining a uniform temperature in the furnace, ensuring the processing quality of the glass, and being easy to use.

[0031] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A device for preventing backflow in a tempering furnace, comprising a mounting frame (1) mounted at a feed inlet and a discharge outlet of the tempering furnace, characterized in that: The mounting frame (1) is provided with a movable plate (3) capable of moving up and down, and a fixed plate (6) on the side of the mounting frame (1) located outside the tempering furnace, the movable plate (3) being located above the fixed plate (6), an upper air cavity (32) being provided inside the movable plate (3), a hot air supply pipe group being provided on the top of the fixed plate (6), a lower air cavity (61) being provided inside the fixed plate (6), and a lower air seal outlet (62) being provided at the bottom of the fixed plate (6) for discharging internal gas upward.

2. The device for preventing backflow in a tempering furnace according to claim 1, characterized in that: A guide rail (2) is provided on the side of the mounting frame (1), and the movable plate (3) is slidably arranged on the guide rail (2).

3. The device for preventing backflow in a tempering furnace according to claim 2, characterized in that: The mounting frame (1) is provided with a hydraulic cylinder (5) capable of driving the movable plate (3) to move up and down.

4. The device for preventing backflow in a tempering furnace according to claim 1, characterized in that: The hot air supply pipe group comprises a hot air pipe (4) connected to an external hot air device, and the bottom of the hot air pipe (4) is provided with evenly distributed air outlet pipes (41), and the air outlet pipes (41) are in communication with the upper air cavity (32).

5. The device for preventing backflow in a tempering furnace according to claim 4, characterized in that: An upper gas-sealed air outlet (33) for exhausting gas downward is provided at the upper end of the side surface of the movable plate (3), the upper gas-sealed air outlet (33) is in communication with the upper air cavity (32), and part of the gas exhausted from the air outlet pipe (41) enters the upper air cavity (32), while the other part is exhausted through the upper gas-sealed air outlet (33).

6. The device for preventing backflow in a tempering furnace according to claim 1, characterized in that: The bottom of the movable plate (3) is provided with an inserting plate (31) that can be inserted into the lower air cavity (61), and the inserting plate (31) is open at the top and bottom to connect the upper air cavity (32) and the lower air cavity (61).

7. The device for preventing backflow in a tempering furnace according to claim 1, characterized in that: A guide plate (7) is provided at the upper end of the side surface of the fixing plate (6), and arc-shaped grooves are provided at the top and bottom of the guide plate (7).

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