Energy-saving air supply system for cooling section of glass tempering furnace

Abstract

The utility model provides an energy-saving air supply system for a cooling section of a glass tempering furnace, and belongs to the field of physical tempering cooling of glass. Comprising a fan and a plurality of air grid bags which are arranged in parallel front and back, each air grid bag is composed of a pair of air grids which are oppositely arranged up and down, glass passes through the middle of the upper air grid and the lower air grid, the fan supplies air to the air grids, the fan is provided with a fan air outlet, and the air grids are provided with air grid air inlets. An air door mechanism capable of communicating or blocking the fan air outlet and the air grid air inlet is arranged between the fan air outlet and the air grid air inlet; when the fan is started, the air door mechanism is in a closed state. Compared with the prior art, the air supply system provided by the utility model has the advantages that the overall energy consumption is smaller, the air door mechanism is arranged at the air outlet end of the fan, compared with the air door mechanism arranged at the air inlet end, the power consumption is saved by 1 / 3 when the fan is started, and more electric energy can be saved under the requirements of thin glass production or high air pressure or multi-frequency startup and shutdown.

Description

Technical Field

[0001] This utility model relates to the field of glass physical tempering cooling, specifically to an energy-saving air supply system for the cooling section of a glass tempering furnace. Background Technology

[0002] Currently, tempered glass production lines on the market typically include an loading platform, a heating furnace, a cooling section, and an unloading platform. Glass sheets are carried by conveyor rollers, passing sequentially through these stages. The glass to be processed undergoes high-temperature heating in the heating furnace and tempering and cooling in the cooling section. The cooling section is equipped with multiple sets of opposing air grates, supplied with air by fans. The glass passes between these grates and is cooled. The cooling section is further divided into a tempering section and a cooling section. The heated glass sheets are rapidly cooled in the tempering section before entering the cooling section for further cooling. Due to the need for rapid cooling and tempering of the heated glass, the air supply fans in the tempering section are generally centrifugal fans, providing high air pressure.

[0003] During startup, the current of a centrifugal fan reaches its maximum, resulting in the highest energy consumption. To reduce load during startup, a damper is installed at the fan's inlet. This damper closes during startup and gradually opens as the airflow increases until normal operation. However, for thin-layer glass, the actual tempering time is only a few seconds to a dozen seconds (≤20 seconds). For example, for 3mm thick glass, the heating time is 90-100 seconds, the quenching pressure is 16000pa, and the quenching time is 5-10 seconds. The subsequent cooling pressure is 2000pa, and the cooling time is 10-15 seconds. Because the cooling time is much shorter than the heating time, to save energy, the fan is intermittently started and stopped during actual use, resulting in a certain standby frequency. Especially for thinner glass, the required tempering pressure is higher, demanding greater fan power and resulting in higher energy consumption during startup. In actual use, it has been found that the energy consumption of existing fans during startup is still relatively high, especially in high-pressure, high-frequency operating environments, where actual power consumption is substantial. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides an energy-saving air supply system for the cooling section of a glass tempering furnace, as follows.

[0005] An energy-saving air supply system for the cooling section of a glass tempering furnace includes a fan and multiple air gratings arranged in parallel front and rear. Each air grating consists of a pair of air grates arranged vertically opposite each other. The glass passes through the middle of the upper and lower air grates, and the fan supplies air to the air grates. The fan has a fan outlet, and the air grates have air grating inlets. A damper mechanism is provided between the fan outlet and the air grating inlets to connect or block the two. When the fan is turned on, the damper mechanism is in the closed state.

[0006] Preferably, as the glass is conveyed forward, the damper mechanism opens gradually, and the damper mechanism corresponding to the air grille after the glass passes closes gradually.

[0007] Preferably, there are several fans, with each fan supplying air to a specific section of the ventilation grid.

[0008] Furthermore, the damper mechanism includes a duct, a damper, and a drive unit. The duct is fitted outside the damper, and the drive unit is connected to the damper, which can drive the damper to rotate inside the duct, thereby separating or connecting the front and rear sections of the duct. The inside of the duct is a cavity with openings at the front and rear, and the two ends of the duct are respectively connected to the air outlet of the fan and the air inlet of the air grid.

[0009] Furthermore, rotating rods are fixedly connected to both sides of the damper along the centerline. The two rotating rods pass through both sides of the duct wall, allowing the damper to rotate around the rotating rods on both sides as an axis.

[0010] Furthermore, the driving component includes a driving source, a synchronous connecting rod, and a tilting connecting rod. One end of the synchronous connecting rod is hinged to the piston rod of the driving source, and the top of the driving source is hinged to a connecting block. The connecting block is fixedly connected to the frame. One end of the tilting connecting rod is hinged to the synchronous connecting rod, and the other end of the tilting connecting rod is fixedly connected to the rotating rod of the damper. By extending and retracting the piston rod in the driving source, the synchronous connecting rod is driven to rock up and down. At the same time, the tilting connecting rod moves up and down, converting linear motion into circular motion, causing the rotating rod to rotate, and thus the damper is tilted.

[0011] Furthermore, the damper mechanism includes two air ducts arranged vertically and horizontally, each with a damper installed inside. One side of the upper and lower air ducts is connected to the upper and lower air grids of the same air grid package, respectively, and the other side of the upper and lower air ducts is connected to a fan. Two flip-up connecting rods are connected to the synchronous connecting rod, which are connected to the upper and lower dampers respectively. When the drive source drives the synchronous connecting rod to swing up and down, the dampers in the upper and lower air ducts flip and switch synchronously.

[0012] Preferably, when multiple air grates are supplied with air by a single fan through an air collection box, the damper mechanism is located between the air outlet of the air collection box and the air inlet of the air grates.

[0013] Preferably, when multiple air grates are supplied with air by one fan, the damper mechanism is located at the fan outlet of the fan.

[0014] Compared with existing technologies, the air supply system provided by this utility model consumes less energy overall. By placing the damper mechanism at the air outlet of the fan, compared with placing it at the air inlet, the power consumption during fan startup is reduced by 1 / 3. For thin glass production, or high air pressure, or frequent start-up and shutdown requirements, even more energy can be saved. In this utility model, the damper mechanism is opened to supply air to the air grid after the fan is fully turned on, so the air supply torque is smaller and the air supply system can respond to air supply more quickly. At the same time, the damper mechanism opens and closes gradually as the glass is transported, so that the fan can supply air gradually with the glass, further saving energy. The damper mechanism of this utility model can synchronously control the airflow of the upper and lower air grids of the same air grid package, ensuring that the airflow and air pressure of the upper and lower air grids are consistent, so that the airflow is uniform on the top and bottom of the glass and the glass quality is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cooperation between the fan and damper mechanism of the air supply system in an embodiment of this utility model.

[0016] Figure 2 This is a schematic diagram of the damper mechanism in an embodiment of this utility model.

[0017] Figure 3 This is a partial structural schematic diagram of the damper mechanism in an embodiment of this utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] like Figure 1-3 As shown, this embodiment provides an energy-saving air supply system for the cooling section of a glass tempering furnace, including a fan 1 and multiple air gratings arranged in parallel (not shown in the figure, as this is a publicly available technology). Each air grating consists of a pair of air grates arranged vertically opposite each other. The glass passes through the middle of the upper and lower air grates. The fan 1 supplies air to the air grates, and the air intake of the upper and lower air grates blows air onto the upper and lower surfaces of the heated glass, thereby cooling the glass. The fan 1 has a fan outlet 13, and the air grates have air inlets. A damper mechanism 2 is provided between the fan outlet 13 and the air inlet to connect or block the two. When the fan 1 is turned on, the damper mechanism 2 is in a closed state. As the glass is conveyed forward, the damper mechanism 2 gradually opens, and the damper mechanism 2 corresponding to the air grates after the glass passes gradually closes.

[0020] In existing technology, the cooling section of a glass tempering furnace includes a tempering section and a cooling section, both of which are composed of several air grates and air supply fans. The cooling section is usually longer than the tempering section, and different power fans are used to supply air to the air grates for the tempering and cooling sections respectively. Therefore, the air supply configurations for the tempering and cooling sections may have different combinations, such as direct-connection air supply or air collection box air supply. No specific air supply section is limited here. In this embodiment, as... Figure 1 As shown, there are several fans 1, with each air grating corresponding to one fan 1 for air supply. This configuration is applicable to, but not limited to, the one-to-one air supply mode in the tempered section. Alternatively, multiple air grates can be supplied by one fan through an air collection box. One or more air collection boxes can be installed in the entire cooling section. In this case, the damper mechanism 2 is located between the air outlet of the air collection box and the air inlet of the air grates. The air collection box can be a three-way or multi-way structure, capable of diverting the air coming out of the fan. Another scenario exists where multiple air grates are supplied by one fan. The damper mechanism can be located at the fan, and it synchronously controls the opening and closing of multiple air grates. This configuration is applicable to, but not limited to, the one-to-many air supply mode in the cooling section.

[0021] The fan can be started in advance. When air needs to enter the air grating, simply open the damper mechanism, and air can be introduced into the air grating by the fan in normal operation. The fan can also be turned on and off sequentially. The damper mechanism can be opened after the fan is fully turned on and ready for use.

[0022] like Figure 2 , 3As shown, the damper mechanism 2 includes a duct 21, a damper 22, and a drive component 23. The duct 21 is fitted onto the outside of the damper 22. The drive component 23 is connected to the damper 22 and can drive the damper 22 to rotate inside the duct 21, thereby separating or connecting the front and rear sections of the duct 21. The interior of the duct 21 is a cavity with openings at the front and rear. Both ends of the duct 21 are connected to the fan outlet 13 and the air grid inlet, respectively. Rotating rods 221 are fixedly connected to both sides of the damper 22 along the centerline. The two rotating rods 221 pass through both sides of the circumferential wall of the duct 21, allowing the damper 22 to rotate around the rotating rods 221 on both sides. The drive component 23 includes a drive source 24, a synchronous connecting rod 25, and a rotating connecting rod 26. The drive source 24 can be a cylinder or other mechanical components that can provide linear motion. One end of the synchronous connecting rod 25 is hinged to the piston rod of the drive source 24. The top of the drive source 24 is hinged to a connecting block 27, which is fixedly connected to the frame (not shown in the figure). One end of the flip connecting rod 26 is hinged to the synchronous connecting rod 25, and the other end of the flip connecting rod 26 is fixedly connected to the rotating rod 221 of the damper 22. Through the extension and retraction of the piston rod in the drive source 24, the drive source 24 and the synchronous connecting rod 25 move adaptively. The synchronous connecting rod 25 will rock up and down, which will cause one end of the flip connecting rod 26 to move up and down, converting the linear motion into circular motion, so that the rotating rod 221 rotates, and thus the damper 22 flips.

[0023] In this embodiment, the size of the damper 22 corresponds to the size of the vertical cross-section of the inner cavity of the air duct 21. The middle part of the air duct 21 is a cavity with openings at the front and back. The damper 22 can be rotated inside the air duct 21 with the center line of the damper 22 as the axis. When the damper 22 is in the vertical state, it can separate the front and back sections of the air duct 21 and thus block the flow of air. When the damper 22 is not in the vertical state, the air duct 22 can be continuously supplied with air.

[0024] Of course, the partitioning method of the air duct 21 can also be modified. For example, a limiting ring with staggered front-to-back and vertical positioning can be set inside the air duct. The limiting ring can be connected to the damper to partition the air duct. The damper and the air duct do not need to be completely vertical; it is enough to achieve the wind-blocking effect. In this embodiment, the air duct 21 is cylindrical and the damper 22 is disc-shaped, but it can also be square or other shapes. The damper 22 just needs to be able to flip and partition the airflow.

[0025] In this embodiment, the damper mechanism is located at the air outlet of the fan. Compared to the air inlet, this reduces the power consumption during fan startup by one-third. For thin glass production, high air pressure, or frequent start-up / shutdown operations, this translates to even greater energy savings. Specific test data is shown in the table below:

[0026] For different input frequencies, the higher the frequency, the faster the impeller speed, and the higher the output air volume and air pressure. The table shows that for low-speed, low-power fans, the power consumption during startup is not significantly different from that during normal use (especially when a damper is installed at the fan outlet). For medium- and high-power fans, regardless of whether a damper is installed at the fan inlet or outlet, the power consumption during startup is effectively reduced. However, compared to placing the damper at the inlet, placing it at the outlet saves 1 / 3 of the power consumption during startup (power consumption is directly proportional to current).

[0027] In this embodiment, the damper mechanism 2 includes two air ducts 21 arranged vertically at intervals. Each air duct 21 is equipped with a damper 22. One side of the upper and lower air ducts 21 is connected to the upper and lower air grilles of the same air grille package, respectively, and the other side of each air duct 21 is connected to a fan. Two flip-up connecting rods 26 are connected to the synchronous connecting rod 25, respectively connected to the upper and lower dampers 22. When the drive source 24 drives the synchronous connecting rod 25 to move up and down, the dampers in the upper and lower air ducts flip-up synchronously. Specifically, this can be achieved by... Figure 1 As can be seen, this embodiment sets up the same number of fans 1 as the number of air grates. Each fan 1 is connected to an air grate, meaning that each air grate package is accompanied by two fans arranged vertically, namely an upper fan 11 and a lower fan 12. Both the upper fan 11 and the lower fan 12 have air outlets 13. A damper mechanism 2 is set between the air outlets 13 and the air inlets of the air grates. In this embodiment, the damper mechanism 2 can simultaneously unblock the air outlets 13 of the upper fan 11 and the lower fan 12, that is, the air outlets of the upper fan 11 and the lower fan 12 can be opened or closed simultaneously. This ensures that the air volume and air pressure of the upper and lower air grates are consistent, so that the airflow is even on both the upper and lower surfaces of the glass, improving the glass quality. Of course, each fan can also be equipped with a damper mechanism for independent operation between itself and its corresponding air grate.

[0028] The damper mechanism can also be used to adjust the airflow. By controlling the extension length of the piston rod of the drive source, the angle of the damper rotation can be adjusted, thereby affecting the actual airflow.

[0029] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solutions described in this invention, or by designing similar technical solutions by those skilled in the art under the inspiration of the technical solutions described in this invention, falls within the protection scope of this invention.

Claims

1. An energy-saving air supply system for the cooling section of a glass tempering furnace, comprising a fan (1) and multiple air gratings arranged in parallel front to back, each air grating consisting of a pair of air grates arranged opposite each other, the glass passing through the middle of the upper and lower air grates, and the fan (1) supplying air to the air grates, characterized in that, The fan (1) has a fan outlet (13) and the air grid has an air grid inlet. A damper mechanism (2) is provided between the fan outlet (13) and the air grid inlet to connect or block the two. When the fan (1) is turned on, the damper mechanism (2) is in the closed state.

2. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 1, characterized in that, As the glass is conveyed forward, the damper mechanism (2) gradually opens, and the damper mechanism (2) corresponding to the wind gate after the glass passes gradually closes.

3. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 1 or 2, characterized in that, The fan (1) has several units, and each fan grid corresponds to one fan (1) for air supply.

4. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 3, characterized in that, The damper mechanism (2) includes a duct (21), a damper (22), and a drive component (23). The duct (21) is fitted on the outside of the damper (22). The drive component (23) is connected to the damper (22) and can drive the damper (22) to rotate inside the duct (21) to separate or connect the front and rear sections of the duct (21). The inside of the duct (21) is a cavity with openings at the front and rear. The two ends of the duct (21) are connected to the fan outlet (13) and the air grid inlet, respectively.

5. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 4, characterized in that, The damper (22) is fixedly connected to the two rotating rods (221) on both sides of the center line. The two rotating rods (221) pass through the two sides of the circumferential wall of the air duct (21) respectively, so that the damper (22) can be rotated around the rotating rods (221) on both sides.

6. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 5, characterized in that, The driving component (23) includes a driving source (24), a synchronous connecting rod (25), and a flip connecting rod (26). One end of the synchronous connecting rod (25) is hinged to the piston rod of the driving source (24). The top of the driving source (24) is hinged to a connecting block (27). The connecting block (27) is fixedly connected to the frame. One end of the flip connecting rod (26) is hinged to the synchronous connecting rod (25). The other end of the flip connecting rod (26) is fixedly connected to the rotating rod (221) of the damper (22). By extending and retracting the piston rod in the driving source (24), the synchronous connecting rod (25) is driven to rock up and down. At the same time, the linear motion is converted into circular motion, causing the rotating rod (221) to rotate, and thus the damper (22) is flipped.

7. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 6, characterized in that, The damper mechanism (2) includes two air ducts (21) arranged at intervals. Each air duct (21) is equipped with a damper (22). One side of the upper and lower air ducts (21) is connected to the upper and lower air grids of the same air grid package, respectively. The other side of the upper and lower air ducts (21) is connected to a fan. Two flip-up connecting rods (26) are connected to the synchronous connecting rod (25), which are connected to the upper and lower dampers (22) respectively. When the drive source (24) drives the synchronous connecting rod (25) to swing up and down, the dampers in the upper and lower air ducts flip-up synchronously.

8. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 1, characterized in that, When multiple air grates are supplied with air by a single fan through an air collection box, the damper mechanism (2) is set between the air outlet of the air collection box and the air inlet of the air grates.

9. The energy-saving air supply system for the cooling section of the glass tempering furnace as described in claim 1, characterized in that, When multiple air grates are supplied with air by one fan, the damper mechanism (2) is set at the fan outlet (13) of the fan.

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