Temperature and pressure control mechanism in float glass annealing lehr

Abstract

The application provides a temperature and pressure control mechanism in a float glass annealing furnace, belonging to the technical field of float glass production. The mechanism comprises two temperature control units respectively located on the upper and lower sides of a glass conveying roller, each temperature control unit comprises a wind box away from the surface of a glass plate and two side plates arranged on the side of the wind box close to the surface of the glass plate, the two side plates are respectively located on the two sides of the glass conveying roller, the wind box is respectively provided with an air inlet pipe and an air outlet pipe on the side close to the glass plate exit direction and the side close to the glass plate entry direction, a plurality of partition plates are longitudinally arranged in the wind box, air vents are reserved between the partition plates and the wind box, the air vents of adjacent partition plates are respectively located on the upper and lower sides of the wind box, air inlet pipes and air outlet pipes are respectively arranged on the two side plates, and the air inlet pipes are connected with the air inlet end of a wind pipe machine. The mechanism has the advantages of more reliable temperature and air pressure control.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of float glass production and relates to a temperature and pressure control mechanism in a float glass annealing furnace. BACKGROUND

[0002] Generally, after being formed in a tin bath, float glass enters an annealing furnace for temperature reduction and stress distribution regulation to meet the requirements of on-line cutting and customer use. The float glass production line annealing furnace can be divided into five zones from front to back, namely, an A zone (heating and soaking zone), a B zone (important annealing zone), a C zone (post-annealing zone), a D zone (hot air circulation forced convection cooling zone) and an F zone (room temperature air forced cooling convection zone). The stress existing in the A zone and the B zone after the glass temperature is reduced to room temperature is permanent stress, and the stress eliminated in the C zone, the D zone and the F zone after the glass temperature is reduced to room temperature is temporary stress. The A zone, the B zone, the C zone and the D zone are an integral whole in the length direction of the annealing furnace, and each zone is provided with a baffle at the upper part and the lower part of the glass to divide the zones, but the glass needs to pass through each zone, and the separation is not complete. The A zone, the B zone and the C zone radiate and cool the glass through internal cooling air pipes, and the cooling air does not enter the interior of the annealing furnace. The D zone cools and reduces the temperature of the glass through hot air convection, and the cooling air enters the interior of the annealing furnace.

[0003] Technical problems existing in the prior art:

[0004] Because the zones cannot be completely separated, the hot air flow of the D zone enters the A zone, the B zone and the C zone, which has irreversible influence on the stress of the glass in the A zone, the B zone and the C zone, and causes the consequences of product cutting damage and glass explosion. Therefore, the cooling air flow of the D zone is difficult to control, and inevitably enters the A zone, the B zone and the C zone, which affects the temperature control of the A zone, the B zone and the C zone, and thus the cooling mode of the D zone needs to be improved. SUMMARY

[0005] The application aims at the above problems existing in the prior art and provides a temperature and pressure control mechanism in a float glass annealing furnace.

[0006] The object of the present application can be achieved by the following technical scheme: a temperature and pressure control mechanism in a float glass annealing furnace, characterized in that it comprises two temperature control units located on the upper and lower sides of a glass conveying roller, each temperature control unit comprises a wind box away from the glass surface and two side plates arranged on the side of the wind box close to the glass surface, the two side plates are located on the two sides of the glass conveying roller, the wind box is provided with an air inlet pipe and an air outlet pipe on the side close to the glass exit direction and the side close to the glass entry direction respectively, a plurality of partition plates are longitudinally arranged in the wind box, and the air vents between the partition plates are located on the upper and lower sides of the wind box respectively, and the two side plates are respectively provided with an air inlet pipe and an air outlet pipe, and the air inlet pipe is connected to the air inlet end of the air pipe machine.

[0007] Further, a plurality of partition plates are arranged between the two side plates, and the adjacent partition plates are spaced apart by 80-200 cm.

[0008] Further, a water-cooled water tank is arranged in the wind box at the partition plate, the water-cooled water tank comprises a horizontally arranged cylindrical water tank and a water wheel rotatably connected in the water tank, and the water inlet end and the water outlet end of the water-cooled water tank are respectively connected to a cold water source and a hot water return pipe.

[0009] Further, a plurality of heat-conducting fins are arranged between the water tanks.

[0010] The present scheme changes the traditional D-zone hot air circulation forced convection cooling method to a relatively static cooling method, uses the closed risk internal flow cooling air flow method to reduce and adjust the ambient temperature of the upper and lower glass surfaces, and then sets a horizontal cooling air flow on the side plate, which is relatively difficult to flow into the area outside the D-zone, and the existence of the partition plate makes the cooling air flow, temperature and air pressure of the D-zone relatively independent.

[0011] In order to strengthen the temperature control effect of the D-zone, a plurality of water tanks are arranged on the glass conveying path of the D-zone, which are located on the flow path of the air flow in the wind box, and can control the temperature of the air flow in the wind box, and the rotating speed of the water wheel can be increased or decreased according to the need to adjust the temperature of each area of the wind box, or the temperature of each area in the wind box can be gradually reduced. Therefore, in terms of controlling temperature and controlling air flow movement and air pressure balance, the present scheme is superior to the existing forced air cooling method, the temperature control means is diversified, and there are positive effects in terms of control accuracy and control difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the temperature and pressure control mechanism in the annealing furnace.

[0013] Figure 2 is a structural schematic view of the water-cooled water tank.

[0014] In the diagram, 1 is the bellows; 2 is the side plate; 3 is the air inlet pipe; 4 is the air outlet pipe; 5 is the air inlet duct; 6 is the partition plate; 7 is the water-cooled tank; 8 is the water wheel; 9 is the heat conduction plate; and 10 is the partition plate. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1 and Figure 2 The temperature and pressure control mechanism inside the float glass annealing furnace shown includes two temperature control units located on the upper and lower sides of the glass conveyor rollers, respectively. Each temperature control unit includes a wind box 1 located away from the glass plate surface and two side plates 2 located on the side of the wind box 1 closest to the glass plate surface. The two side plates 2 are located on both sides of the glass conveyor rollers. The wind box 1 is provided with an air inlet pipe 3 and an air outlet pipe 4 on the side closer to the glass plate outlet direction and the side closer to the glass plate inlet direction, respectively. Several alternating partitions 10 are arranged longitudinally inside the wind box 1. Ventilation openings are reserved between the partitions 10 and the wind box 1. The ventilation openings of adjacent partitions 10 are located on the upper and lower sides of the wind box 1, respectively. An air inlet pipe 5 and an air outlet pipe are respectively provided on the two side plates 2. The air inlet pipe 5 is connected to the air inlet end of the air duct machine.

[0017] Several partition plates 6 are arranged between the two side plates 2, with an interval of 80-200cm between adjacent partition plates 6. A water-cooled water tank 7 is installed in the air box 1 at the partition plate 6. The water-cooled water tank 7 includes a horizontally arranged cylindrical water tank and a water wheel 8 rotatably connected inside the water tank. The inlet and outlet of the water-cooled water tank 7 are respectively connected to a cold water source and a hot water return pipe. Several heat-conducting fins 9 are arranged alternately on the outside of the water-cooled water tank.

[0018] This solution changes the traditional forced convection cooling method of hot air circulation in zone D to a relatively static cooling method. It uses a closed, risk-prone internal flow cooling airflow to reduce and adjust the ambient temperature of the area where the upper and lower glass panels are located. Then, a transverse cooling airflow is set on the side panel 2 to assist the cooling airflow. The transverse cooling airflow is relatively less likely to enter the area outside zone D. In addition, the presence of the partition 10 makes the cooling airflow, temperature and air pressure in zone D relatively independent.

[0019] To enhance temperature control in zone D, multiple water tanks are installed along the airflow path within zone D. These water tanks are positioned along the airflow path inside the airbox 1, allowing for temperature control of the airflow within the airbox 1. The rotational speed of the water turbine 8 can be increased or decreased as needed to regulate the temperature in different zones of the airbox 1, or the temperature in each zone can be gradually decreased. Therefore, this solution is superior to existing forced air cooling methods in terms of temperature control, airflow regulation, and pressure balance. It offers more diverse temperature control methods and demonstrates positive effects in terms of control precision and complexity.

[0020] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in the specific embodiments described herein can occur to those skilled in the art to which the application pertains without departing from the spirit of the application, and it is understood that such modifications or changes are to be considered as within the scope of the application as defined by the appended claims.

Claims

1. A temperature and pressure control mechanism in a float glass annealing lehr, characterized by, The application relates to a temperature control unit for glass conveying roller, which comprises two temperature control units arranged on the upper and lower sides of a glass conveying roller respectively, a wind box (1) away from the surface of a glass plate and two side plates (2) arranged on the side of the wind box (1) close to the surface of the glass plate, the two side plates (2) are arranged on the two sides of the glass conveying roller respectively, the wind box (1) is provided with an air inlet pipe (3) and an air outlet pipe (4) on the side close to the glass plate-out direction and the side close to the glass plate-in direction respectively, a plurality of partition plates (10) are arranged longitudinally in the wind box (1), the partition plates (10) and the wind box (1) are provided with air vents, the air vents of adjacent partition plates (10) are arranged on the upper and lower sides of the wind box (1) respectively, air inlet pipes (5) and air outlet pipes are arranged on the two side plates (2) respectively, and the air inlet pipes (5) are connected with the air inlet ends of the air pipe machines.

2. A mechanism for controlling temperature and pressure in a float glass annealing lehr according to claim 1, wherein A plurality of partition plates (6) are arranged between the two side plates (2), and the adjacent partition plates (6) are spaced by 80-200 cm.

3. A mechanism for controlling temperature and pressure in a float glass annealing lehr according to claim 2, wherein A water-cooled water tank (7) is arranged in the wind box (1) at the partition plate (6), the water-cooled water tank (7) comprises a horizontally-arranged cylindrical water tank and a water wheel (8) rotatably connected in the water tank, and the water inlet end and the water outlet end of the water-cooled water tank (7) are connected with a cold water source and a hot water return pipeline respectively.

4. A mechanism for controlling temperature and pressure in a float glass annealing lehr according to claim 3, wherein A plurality of heat-conducting sheets (9) are arranged outside the water-cooled water tank (7).

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