Air filtering structure for glass tempering furnace

Abstract

The utility model discloses an air filtration structure for glass tempering furnace, including shell, anti-backflow mechanism and limit adjustment mechanism, shell: its bottom end is fixedly connected with the support frame, shell upper end air inlet is equipped with the air inlet pipe, shell bottom end air outlet is equipped with the air outlet pipe, shell inner middle is fixedly connected with the filter material frame, and shell bottom end air outlet is equipped with the air outlet pipe. A filter element is arranged in the filter material frame, a sliding hole is formed in the middle of the interior of the filter material frame, the backflow preventing mechanism is arranged at the upper end of the interior of the shell, the middle of the backflow preventing mechanism is slidably connected with the inner wall of the sliding hole, the limiting adjusting mechanism is arranged at the lower end of the interior of the shell, and the upper end of the limiting adjusting mechanism and the lower end of the backflow preventing mechanism are installed in a matched mode. According to the air filtering structure for the glass tempering furnace, the air inlet amount can be accurately and automatically adjusted, and the backflow prevention device is arranged, so that the situation that the filtering mechanism is damaged due to backflow of air in the furnace when the induced draft fan is closed can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of toughened glass production, in particular to an air filtration structure for a glass tempering furnace. Background Technique

[0002] A glass tempering furnace is also known as a glass tempering unit, a tempering furnace, a tempering device, a tempering unit. The glass tempering furnace uses physical or chemical methods to form a compressive stress layer on the glass surface and a tensile stress layer inside. When the glass is subjected to external forces, the compressive stress layer can offset part of the tensile stress to prevent the glass from breaking, thereby achieving the purpose of improving the strength of the glass. Moreover, the microcracks on the glass surface become finer under this compressive stress, which also improves the strength of the glass to a certain extent. The commonly used physical tempering method is to heat the glass to around the softening point (about 650 °C). At this time, the glass can still maintain its original shape, but the particles in the glass already have a certain migration ability to adjust the structure so that the internal stress can be quickly eliminated. Then, the tempered glass in the glass tempering furnace is blown and rapidly cooled. When the temperature is balanced, compressive stress is generated on the glass surface and tensile stress is generated inside the layer, that is, the glass generates a uniform and regularly distributed internal stress, which improves the tensile strength of the glass as a brittle material, thereby improving the bending and impact resistance of the glass. Since the air contains dust particles, it will contaminate the glass surface. Therefore, the air needs to be filtered before the blowing and rapid cooling. The existing air filtration device for a glass tempering furnace usually uses an induced draft fan to suck external air into the filter tank, and then filters the external air into clean air that meets the standards through filter materials and sends it into the body to blow and rapidly cool the tempered glass. When the tempering furnace stops calcining and outputs the fired glass, the induced draft fan needs to be turned off to achieve the purpose of energy saving. The structure of the existing air filtration device for a glass tempering furnace is simple, and it can only adjust the air intake volume through an external induced draft fan, with low adjustment accuracy and no anti-backflow device. When the induced draft fan is turned off, the temperature inside the furnace is relatively high at this time, and the air pressure inside the furnace is higher than the air pressure outside the furnace. The high-temperature flue gas inside the furnace is likely to enter the filter tank through the air outlet of the air filtration device. After the purification filter element in the air filter is baked and corroded by the high-temperature flue gas for a long time, the filter element will be damaged and the air filtration will be insufficient, which greatly reduces the production quality and the service life of the filter. For this reason, we propose an air filtration structure for a glass tempering furnace. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an air filtration structure for a glass tempering furnace, which can accurately and automatically adjust the size of the air intake volume, is provided with an anti-backflow device, and can effectively prevent the air inside the furnace from flowing back and damaging the filtration mechanism when the induced draft fan is turned off, and can effectively solve the problems in the background technique.

[0004] To achieve the above object, the present utility model provides the following technical solutions: An air filtration structure for a glass tempering furnace, comprising a housing, a backflow prevention mechanism and a limit adjustment mechanism;

[0005] Housing: A support frame is fixedly connected to its bottom end. An air inlet pipe is provided at the upper air inlet of the housing, and an air outlet pipe is provided at the bottom air outlet of the housing. A filter media rack is fixedly connected to the middle inside the housing. A filter element is provided inside the filter media rack, and a sliding hole is opened in the middle inside the filter media rack;

[0006] Backflow prevention mechanism: It is arranged at the upper end inside the housing, and the middle part of the backflow prevention mechanism is slidably connected to the inner wall of the sliding hole;

[0007] Limit adjustment mechanism: It is arranged at the lower end inside the housing. The lower end of the limit adjustment mechanism is fixedly connected to the bottom wall of the housing, and the upper end of the limit adjustment mechanism is cooperatively installed with the lower end of the backflow prevention mechanism, which can accurately and automatically adjust the size of the air intake volume. A backflow prevention device is provided, which can effectively prevent the air in the furnace from flowing back when the air blower is turned off and damaging the filtration mechanism.

[0008] Further, the backflow prevention mechanism includes a sliding column, a baffle and a spring. The sliding column is slidably connected inside the sliding hole. A baffle is provided at the upper end of the sliding column. Uniformly distributed diversion holes are opened at the upper end of the baffle. A spring is provided between the lower end of the baffle and the upper end of the filter media rack. The spring is sleeved on the outer surface of the sliding column, which can make the air quickly enter the furnace body.

[0009] Further, the backflow prevention mechanism further includes a valve plate. The valve plate is fixedly connected to the lower end of the sliding column, and the outer surface of the valve plate is cooperatively installed with the inner wall of the housing to prevent the air in the furnace from flowing back.

[0010] Further, the backflow prevention mechanism further includes an inner cavity. The inner cavity is opened in the middle of the bottom end of the valve plate to press the valve plate and further prevent the air in the furnace from flowing back.

[0011] Further, the limit adjustment mechanism includes a sliding groove, a limit frame and a lead screw. The sliding grooves are uniformly opened at the lower end of the inner wall of the housing. A limit frame is slidably connected between the four sliding grooves. The upper end of the limit frame is cooperatively installed with the bottom end of the valve plate. The lead screw is rotatably connected to the lower end inside the housing, and the outer surface of the lead screw is threadedly connected to the middle part of the limit frame, which can quickly and accurately adjust the size of the air intake volume.

[0012] Further, the limit adjustment mechanism further includes a motor. The motor is fixedly connected to the middle of the bottom end of the housing. The input end of the motor is electrically connected to the output end of the single-chip microcomputer. The upper end of the output shaft of the motor is fixedly connected to the lower end of the lead screw to provide stable drive for the adjustment work.

[0013] Further, it further includes a single-chip microcomputer which is fixedly connected to the right side of the outer surface of the housing. The input end of the single-chip microcomputer is electrically connected to an external power supply to provide stable drive for the adjustment work.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The air filtering structure for this glass tempering furnace has the following advantages:

[0015] 1. Air is pressurized by an external induced draft fan and enters the interior of the housing through the air inlet pipe. When the pressurized air passes through the baffle, a part of the air passes through the diversion holes and enters the filtering area, and a part of the air is blocked by the solid plate body of the baffle. As the air accumulates more and more, the air at the upper end of the baffle will continuously exert pressure on the baffle, and the air passing through the filter element will also exert pressure on the upper end of the valve plate. Then, the blocked air will continuously squeeze the baffle and the valve plate downward. At this time, the baffle drives the sliding column to slide downward, the spring is compressed under force, and the valve plate also moves downward accordingly until the spring reaches the compression limit, and the outer surface of the valve plate is completely separated from the inner wall of the housing. At this time, the air intake volume is the largest, and the filtered air will pass through the gap between the outer surface of the valve plate and the inner wall of the housing, and then enter the furnace body through the air outlet pipe to blow and quench the glass suddenly. When it is necessary to reduce the air intake volume, the single-chip microcomputer controls the motor to operate. The output shaft of the motor drives the lead screw to rotate, and the limit frame moves upward as the lead screw rotates. The upper end of the limit frame contacts the bottom end of the valve plate. As the limit frame continues to move upward, the limit frame continuously pushes up the valve plate, and the valve plate will slowly move upward as the limit frame pushes up. As the valve plate slowly moves upward, the gap between the outer surface of the valve plate and the inner wall of the housing will become smaller and smaller. During the air filtering process of the glass tempering furnace, the amount of air entering per unit time will also decrease, so as to realize precise adjustment of the air intake volume.

[0016] 2. When the tempering furnace stops calcining and outputs the fired glass and the external induced draft fan is turned off, air no longer enters the furnace body. The pressure at the upper end of the baffle disappears, the spring rebounds without force, drives the sliding column to slide upward, and the baffle and the valve plate also move upward accordingly until the upper end of the limit outer edge on the valve plate contacts the inner wall of the housing. At the same time, the air pressure inside the furnace is higher than the air pressure outside the furnace, and the air inside the furnace flows back and fills the lower end of the interior of the housing through the air outlet pipe. Since the horizontal height of the inner cavity is higher than the horizontal height of the limit outer edge, the air inside the furnace will form a certain upward pressure on the valve plate, making the limit outer edge further close to the inner wall of the housing. During the air filtering process of the glass tempering furnace, it can effectively prevent the air inside the furnace from flowing back and damaging the filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic sectional structural diagram of the anti-backflow mechanism and the limit adjustment mechanism of the present utility model;

[0019] Figure 3 This is an exploded structural view of the anti-backflow mechanism and the limit adjustment mechanism of the present utility model.

[0020] In the figure: 1 housing, 2 support frame, 3 intake pipe, 4 outlet pipe, 5 filter material rack, 6 filter element, 7 anti-backflow mechanism, 71 sliding column, 72 baffle, 73 spring, 74 valve plate, 75 inner cavity, 8 limit adjustment mechanism, 81 chute, 82 limit frame, 83 motor, 84 lead screw, 9 single-chip microcomputer. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3 , this embodiment provides a technical solution: an air filtration structure for a glass tempering furnace, including a housing 1, an anti-backflow mechanism 7 and a limit adjustment mechanism 8;

[0023] Housing 1: Its bottom end is fixedly connected to a support frame 2 to provide stable support for the machine body. An intake pipe 3 is provided at the upper intake port of the housing 1, and an outlet pipe 4 is provided at the bottom outlet port of the housing 1. A filter material rack 5 is fixedly connected in the middle of the interior of the housing 1, and a filter element 6 is provided inside the filter material rack 5. A sliding hole is opened in the middle of the interior of the filter material rack 5. It also includes a single-chip microcomputer 9, which is fixedly connected to the right side of the outer surface of the housing 1. The input end of the single-chip microcomputer 9 is electrically connected to an external power supply to provide stable drive for the adjustment work;

[0024] Anti-backflow mechanism 7: It is arranged at the upper end inside the housing 1. The middle part of the anti-backflow mechanism 7 is slidably connected to the inner wall of the sliding hole. The anti-backflow mechanism 7 includes a sliding column 71, a baffle 72 and a spring 73. The sliding column 71 is slidably connected inside the sliding hole. A baffle 72 is provided at the upper end of the sliding column 71. Uniformly distributed diversion holes are opened at the upper end of the baffle 72. A spring 73 is provided between the lower end of the baffle 72 and the upper end of the filter material rack 5. The spring 73 is sleeved on the outer surface of the sliding column 71, which can make air quickly enter the furnace body. The anti-backflow mechanism 7 also includes a valve plate 74, which is fixedly connected to the lower end of the sliding column 71. The valve plate 74 is a frustum with a thinner upper part and a thicker lower part. A limiting outer edge is provided at the lower end of the outer surface of the valve plate 74. The outer surface of the valve plate 74 is fitted with the inner wall of the housing 1 to prevent the air in the furnace from flowing back. The anti-backflow mechanism 7 also includes an inner cavity 75, which is opened in the middle of the bottom end of the valve plate 74 to press the valve plate 74 and further prevent the air in the furnace from flowing back;

[0025] Limit adjustment mechanism 8: It is arranged at the lower end inside the housing 1. The lower end of the limit adjustment mechanism 8 is fixedly connected to the bottom wall of the housing 1, and the upper end of the limit adjustment mechanism 8 is cooperatively installed with the lower end of the anti-backflow mechanism 7. The limit adjustment mechanism 8 includes a chute 81, a limit frame 82 and a lead screw 84. The chute 81 is evenly opened at the lower end of the inner wall of the housing 1. A limit frame 82 is slidably connected between the four chutes 81. The upper end of the limit frame 82 is cooperatively installed with the bottom end of the valve plate 74. The lead screw 84 is rotatably connected to the lower end inside the housing 1, and the outer surface of the lead screw 84 is threadedly connected to the middle of the limit frame 82, which can quickly and accurately adjust the size of the air intake. The limit adjustment mechanism 8 further includes a motor 83. The motor 83 is fixedly connected to the middle of the bottom end of the housing 1. The input end of the motor 83 is electrically connected to the output end of the single-chip microcomputer 9. The upper end of the output shaft of the motor 83 is fixedly connected to the lower end of the lead screw 84, providing stable drive for the adjustment work and being able to accurately and automatically adjust the size of the air intake. An anti-backflow device is provided, which can effectively prevent the air in the furnace from flowing back when the induced draft fan is closed and damaging the filtering mechanism.

[0026] The working principle of an air filtration structure for a glass tempering furnace provided by the utility model is as follows: When performing air filtration work for a glass tempering furnace, the air for the glass tempering furnace is pressurized by an external induced draft fan and enters the interior of the housing 1 through the air inlet pipe 3. When the pressurized air for the glass tempering furnace passes through the baffle 72, a part of the air for the glass tempering furnace passes through the diversion holes and enters the filtration area, and a part of the air for the glass tempering furnace is blocked by the solid plate body of the baffle 72. As the air for the glass tempering furnace accumulates more and more, the air above the baffle 72 will continuously exert pressure on the baffle 72, and the air passing through the filter element 6 will also exert pressure on the upper end of the valve plate 74. Then, the blocked air will continuously squeeze the baffle 72 and the valve plate 74 downward. At this time, the baffle 72 drives the sliding column 71 to slide downward, the spring 73 is compressed under force, and the valve plate 74 also moves downward accordingly until the spring 73 reaches the compression limit, and the outer surface of the valve plate 74 is completely separated from the inner wall of the housing 1. At this time, the air intake volume is the largest, and the filtered air will pass through the gap between the outer surface of the valve plate 74 and the inner wall of the housing 1, and then enter the furnace body through the air outlet pipe 4 to blow and quench the glass suddenly. When it is necessary to reduce the air intake volume, the single-chip microcomputer 9 controls the operation of the motor 83. The output shaft of the motor 83 drives the lead screw 84 to rotate. Because the outer surface of the lead screw 84 is threadedly connected to the middle part of the limit frame 82, the limit frame 82 will move upward as the lead screw 84 rotates. The upper end of the limit frame 82 contacts the bottom end of the valve plate 74. As the limit frame 82 continuously moves upward, the limit frame 82 continuously pushes up the valve plate 74. Since the downward force of the anti-backflow mechanism 7 under the extrusion of the air flow is less than the upward force when the limit adjustment mechanism 8 operates, the valve plate 74 will slowly move upward as the limit frame 82 pushes up. Because the valve plate 74 is a frustum with a thinner upper part and a thicker lower part as a whole, and the inner diameter of the housing 1 is fixed, as the valve plate 74 slowly moves upward, the gap between the outer surface of the valve plate 74 and the inner wall of the housing 1 will become smaller and smaller, and the air volume entering per unit time will also decrease, so as to achieve precise adjustment of the air intake volume. When the tempering furnace stops calcining and outputs the fired glass and the external induced draft fan is turned off, the air no longer enters the furnace body. The pressure above the baffle 72 disappears, the spring 73 rebounds without force, drives the sliding column 71 to slide upward, and the baffle 72 and the valve plate 74 also move upward accordingly until the upper end of the limit outer edge of the valve plate 74 contacts the inner wall of the housing 1. At the same time, the air pressure in the glass tempering furnace is higher than the air pressure outside the furnace, and the air in the furnace flows back and fills the lower end of the interior of the housing 1 through the air outlet pipe 4. Since the horizontal height of the inner cavity 75 is higher than the horizontal height of the limit outer edge, the air in the glass tempering furnace will form a certain upward pressure on the valve plate 74, so that the limit outer edge is further closely attached to the inner wall of the housing 1, which can effectively prevent the air in the glass tempering furnace from flowing back and damaging the filter material.

[0027] It should be noted that in the above embodiments, the single-chip microcomputer 9 disclosed is an S7-200 single-chip microcomputer, and the motor 83 is a YVF-112M-4 motor. The single-chip microcomputer 9 controls the operation of the motor 83 using a method commonly used in the prior art.

[0028] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. An air filtration structure for a glass tempering furnace, characterized in that: It includes a housing (1), a backflow prevention mechanism (7) and a limit adjustment mechanism (8); Housing (1): A support frame (2) is fixedly connected to its bottom end. An intake pipe (3) is provided at the upper intake port of the housing (1), and an outlet pipe (4) is provided at the bottom outlet port of the housing (1). A filter media rack (5) is fixedly connected in the middle of the interior of the housing (1). A filter element (6) is provided inside the filter media rack (5). A sliding hole is opened in the middle of the interior of the filter media rack (5); Backflow prevention mechanism (7): It is arranged at the upper end inside the housing (1), and the middle part of the backflow prevention mechanism (7) is slidably connected to the inner wall of the sliding hole; Limit adjustment mechanism (8): It is arranged at the lower end inside the housing (1), and the upper end of the limit adjustment mechanism (8) is cooperatively installed with the lower end of the backflow prevention mechanism (7).

2. The air filtration structure for a glass tempering furnace according to claim 1, characterized in that: It further includes a single-chip microcomputer (9), and the single-chip microcomputer (9) is fixedly connected to the right side of the outer surface of the housing (1). The input end of the single-chip microcomputer (9) is electrically connected to an external power supply.

3. The air filtration structure for a glass tempering furnace according to claim 2, wherein: The backflow prevention mechanism (7) includes a sliding column (71), a baffle plate (72) and a spring (73). The sliding column (71) is slidably connected inside the sliding hole. A baffle plate (72) is provided at the upper end of the sliding column (71). Uniformly distributed diversion holes are opened at the upper end of the baffle plate (72). A spring (73) is provided between the lower end of the baffle plate (72) and the upper end of the filter media rack (5). The spring (73) is sleeved on the outer surface of the sliding column (71).

4. An air filtration structure for a glass tempering furnace according to claim 3, characterized in that: The backflow prevention mechanism (7) further includes a valve plate (74), and the valve plate (74) is fixedly connected to the lower end of the sliding column (71). The outer surface of the valve plate (74) is cooperatively installed with the inner wall of the housing (1).

5. The air filtration structure for a glass tempering furnace according to claim 4, wherein: The backflow prevention mechanism (7) further includes an inner cavity (75), and the inner cavity (75) is opened in the middle of the bottom end of the valve plate (74).

6. The air filtration structure for a glass tempering furnace according to claim 5, characterized in that: The limit adjustment mechanism (8) includes a chute (81), a limit frame (82) and a lead screw (84). The chutes (81) are uniformly opened at the lower end of the inner wall of the housing (1). A limit frame (82) is slidably connected between the four chutes (81). The upper end of the limit frame (82) is cooperatively installed with the bottom end of the valve plate (74). The lead screw (84) is rotatably connected to the lower end inside the housing (1). The outer surface of the lead screw (84) is threadedly connected to the middle part of the limit frame (82).

7. An air filtration structure for a glass tempering furnace according to claim 6, characterized in that: The limit adjustment mechanism (8) further includes a motor (83), and the motor (83) is fixedly connected to the middle of the bottom end of the housing (1). The input end of the motor (83) is electrically connected to the output end of the single-chip microcomputer (9). The upper end of the output shaft of the motor (83) is fixedly connected to the lower end of the lead screw (84).

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