Feeding and discharging device of roller kiln

Abstract

The feeding and discharging device comprises a kiln body, a sintering chamber and a cooling chamber are arranged on the front side of the kiln body, the adjacent sides of the sintering chamber and the cooling chamber are communicated through a through opening, and the inner walls of the front sides and the rear sides of the sintering chamber and the cooling chamber are jointly and fixedly connected with a second installation plate. The adjacent sides of the two second mounting plates are jointly and rotationally connected with a plurality of second conveying rollers, the front side of the second mounting plate located on the front side is fixedly connected with a plurality of first mounting plates, and the adjacent sides of every two matched first mounting plates are jointly and rotationally connected with a plurality of first conveying rollers. According to the device, the sintering chamber and the cooling chamber are arranged, so that the silicon nitride substrate can be quickly cooled after being sintered and discharged from the kiln every time, and when the silicon nitride substrate is cooled, heat can be transmitted into the fixing frame to be preheated in the sintering furnace, so that the subsequent sintering time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of stretch filter membrane processing technology, and in particular to a roller kiln feeding and discharging device. Background Technology

[0002] In the industrial production of silicon nitride substrates, the roller kiln, as the core sintering equipment, plays a decisive role in production quality and efficiency due to the performance of its feeding and discharging devices. Traditional roller kiln feeding and discharging devices have significant drawbacks: First, after sintering, the silicon nitride substrates are rapidly exposed to the outside air. Due to the low temperature of the outside air, the substrates are prone to cracking, deformation, and other quality problems caused by sudden cooling. Second, a large amount of waste heat generated during the substrate sintering process is directly discharged without effective recovery and utilization, resulting in energy waste. Furthermore, the lack of a preheating process before the substrates enter the kiln increases the energy consumption and time costs required for subsequent sintering.

[0003] Therefore, it is necessary to design a roller kiln feeding and discharging device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a roller kiln feeding and discharging device. This device, through the arrangement of a sintering chamber and a cooling chamber, enables rapid cooling after each silicon nitride substrate is sintered and exits the kiln. Furthermore, during the cooling of the silicon nitride substrate, heat can be transferred to the fixed frame for preheating before it enters the sintering furnace, thereby reducing the subsequent sintering time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A roller kiln feeding and discharging device includes a kiln body. A sintering chamber and a cooling chamber are provided on the front side of the kiln body. The adjacent sides of the sintering chamber and the cooling chamber are connected through a passage. The inner walls of the front and rear sides of the sintering chamber and the cooling chamber are fixedly connected to a second mounting plate. The adjacent sides of two second mounting plates are rotatably connected to a plurality of second conveying rollers. The front side of the second mounting plate located on the front side is fixedly connected to a plurality of first mounting plates. The adjacent sides of every two cooperating first mounting plates are rotatably connected to a plurality of first conveying rollers.

[0007] Preferably, the upper ends of the sintering chamber and the cooling chamber are each provided with a first sliding groove, the front side of the sintering chamber is provided with a first closed door, and the front side of the cooling chamber is provided with a second closed door. The first closed door and the second closed door are both slidably connected to the first sliding groove. The upper ends of the first closed door and the second closed door are both fixedly connected with a first vertical plate. The upper end of the first vertical plate extends to the outside. The adjacent sides of the two first vertical plates are fixedly connected with a connecting rod.

[0008] Preferably, the upper end of the passage is provided with a second sliding groove, the passage is provided with a third sealing door, the third sealing door is slidably connected to the second sliding groove, the upper end of the third sealing door is fixedly connected with a second vertical plate, the second vertical plate and the first vertical plate located on the right are jointly fixedly connected with an L-shaped block, the upper end of the kiln body is fixedly connected with a first pneumatic rod, and the telescopic end of the first pneumatic rod is fixedly connected to the lower end of the L-shaped block.

[0009] Preferably, the second mounting plate located on the front side has two openings, and a second pneumatic rod is fixedly connected to the rear inner wall of the cooling chamber, with a push plate fixedly connected to the telescopic end of the second pneumatic rod.

[0010] Preferably, a heat exchanger is embedded in the left inner wall of the cooling chamber.

[0011] Preferably, a circulation pump is installed on the right side of the heat exchanger, and a fixing frame is fixedly connected to the upper ends of the two first mounting plates on the right side. Thermally conductive hollow plates are installed on the inner walls of both sides of the fixing frame. The liquid inlet of the circulation pump is connected to the liquid outlet of the heat exchanger. The liquid outlet of the circulation pump is connected to the rear space of the two thermally conductive hollow plates through a liquid inlet pipe. The rear space of the two thermally conductive hollow plates is connected to the liquid inlet of the heat exchanger through a return pipe. Both the liquid inlet pipe and the return pipe are tee pipes.

[0012] Compared with existing technologies, the advantages of this device are:

[0013] 1. Compared with the existing technology, this device, by setting up a sintering chamber and a cooling chamber, can achieve rapid and uniform cooling in a closed environment after the silicon nitride substrate is sintered and exits the kiln. This effectively avoids quality problems such as cracks and deformation caused by the substrate being directly exposed to the outside low-temperature air and thus significantly improves the product yield.

[0014] 2. Compared with existing technologies, this device innovatively designs a waste heat recovery and utilization system. During the cooling process of silicon nitride substrate, heat is transferred to the fixed frame through components such as heat exchangers, circulating pumps, and heat-conducting hollow plates to preheat the substrate waiting to enter the sintering furnace. This significantly reduces the time and energy consumption required for subsequent sintering, lowers production costs, and achieves the goal of energy conservation and emission reduction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a roller kiln feeding and discharging device proposed in this utility model;

[0016] Figure 2 for Figure 1 Top sectional view;

[0017] Figure 3 for Figure 1 A structural diagram from another perspective.

[0018] In the diagram: 1 Kiln body, 2 First closed door, 3 Second closed door, 4 First vertical plate, 5 Connecting rod, 6 Second vertical plate, 7 L-shaped block, 8 First pneumatic rod, 9 First mounting plate, 10 First conveying roller, 11 Fixing frame, 12 Return pipe, 13 Liquid inlet pipe, 14 Second mounting plate, 15 Second conveying roller, 16 Third closed door, 17 Second pneumatic rod, 18 Push plate, 19 Heat exchanger, 20 Circulating pump. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-3 A roller kiln feeding and discharging device includes a kiln body 1. A sintering chamber and a cooling chamber are provided on the front side of the kiln body 1. The adjacent sides of the sintering chamber and the cooling chamber are connected through a passage. The inner walls of the front and rear sides of the sintering chamber and the cooling chamber are fixedly connected to a second mounting plate 14. The adjacent sides of the two second mounting plates 14 are rotatably connected to a plurality of second conveying rollers 15. The front side of the second mounting plate 14 located on the front side is fixedly connected to a plurality of first mounting plates 9. The adjacent sides of every two cooperating first mounting plates 9 are rotatably connected to a plurality of first conveying rollers 10. The first conveying rollers 10 and the second conveying rollers 15 constitute a material conveying channel. The first conveying roller 10 on the right side is mainly responsible for sending the material to be sintered into the sintering chamber. The first conveying roller 10 on the left side is mainly used for discharging material. The second conveying rollers 15 are used to convey the sintered material from the sintering chamber to the cooling chamber and to send the cooled material out of the device. The continuous transmission of material is achieved by the rotation of the rollers (the drive for the rotation of the rollers is the drive of the roller kiln in the prior art), thereby improving production efficiency.

[0021] The sintering chamber and cooling chamber are each equipped with a first sliding groove at their upper ends. A first sealing door 2 is located on the front side of the sintering chamber, and a second sealing door 3 is located on the front side of the cooling chamber. Both the first sealing door 2 and the second sealing door 3 are slidably connected to the first sliding groove. A first vertical plate 4 is fixedly connected to the upper end of both the first sealing door 2 and the second sealing door 3. The upper end of the first vertical plate 4 extends to the outside. A connecting rod 5 is fixedly connected to the adjacent sides of the two first vertical plates 4. A second sliding groove is located at the upper end of the opening, and a third sealing door 16 is located inside the opening. The third sealing door 16 is slidably connected to the second sliding groove. A second vertical plate 6 is fixedly connected to the upper end of the third sealing door 16. The second vertical plate 6 is connected to the first vertical plate located on the right side. An L-shaped block 7 is fixedly connected between the four parts. A first pneumatic rod 8 is fixedly connected to the upper end of the kiln body 1. The telescopic end of the first pneumatic rod 8 is fixedly connected to the lower end of the L-shaped block 7. The first closed door 2 and the second closed door 3 slide synchronously through the first vertical plate 4 and the connecting rod 5, which facilitates quick opening and closing and effectively isolates the sintering chamber, cooling chamber and external environment, reducing heat loss and interference from external factors. The third closed door 16 is raised and lowered by the L-shaped block 7 and the second vertical plate 6 under the drive of the first pneumatic rod 8. It is used to control the opening and closing of the passage between the sintering chamber and the cooling chamber, ensuring that the material enters the cooling chamber from the sintering chamber at the appropriate time, while maintaining the temperature independence between the two chambers.

[0022] The second mounting plate 14 located on the front side has two openings, and a second pneumatic rod 17 is fixedly connected to the rear inner wall of the cooling chamber. The telescopic end of the second pneumatic rod 17 is fixedly connected to a push plate 18.

[0023] A heat exchanger 19 is embedded in the left inner wall of the cooling chamber, and a circulating pump 20 is installed on the right side of the heat exchanger 19. A fixing bracket 11 is fixedly connected to the upper ends of two first mounting plates 9 on the right side. Heat-conducting hollow plates are installed on the inner walls of both sides of the fixing bracket 11. The liquid inlet of the circulating pump 20 is connected to the liquid outlet of the heat exchanger 19. The liquid outlet of the circulating pump 20 is connected to the rear space of the two heat-conducting hollow plates through an inlet pipe 13. The rear space of the two heat-conducting hollow plates is connected to the liquid inlet of the heat exchanger 19 through a return pipe 12. Both the liquid pipe 13 and the return pipe 12 are tee pipes. The heat exchanger 19 is responsible for absorbing the heat emitted by the material in the cooling chamber and transferring it to the circulating liquid. The circulating pump 20 drives the circulating liquid to flow in the loop composed of the liquid inlet pipe 13, the heat-conducting hollow plate, the return pipe 12 and the heat exchanger 19. The heat-conducting hollow plate transfers the heat carried by the circulating liquid to the material to be sintered in the fixed frame 11 to achieve preheating. The tee pipe design of the liquid inlet pipe 13 and the return pipe 12 ensures the diversion and merging of the liquid, so that the entire waste heat recovery and utilization system can operate efficiently and stably.

[0024] The functional principle of this invention can be explained through the following operation: First, the silicon nitride substrate to be sintered is placed on the first conveying roller 10 on the right side. The rotation of the first conveying roller 10 feeds the substrate into the sintering chamber. At this time, the first sealing door 2, the second sealing door 3, and the third sealing door 16 are closed to ensure the airtightness and stable sintering temperature inside the sintering chamber. After the substrate completes the sintering process in the sintering chamber, the substrate entering the sintering chamber will move to the second conveying roller 15. After sintering is completed, the rotation of multiple second conveying rollers 15 moves the silicon carbide substrate to the cooling chamber. At this time, some of the heat in the sintering chamber will be transferred to the cooling chamber, thereby preventing the silicon carbide substrate from directly contacting the outside cold air and causing cracking.

[0025] In the cooling chamber, the heat exchanger 19 and the circulating pump 20 start to work. The heat exchanger 19 absorbs the heat emitted by the substrate and transfers the heat to the circulating liquid. The circulating pump 20 pushes the liquid through the inlet pipe 13 into the heat-conducting hollow plate on the fixed frame 11 to preheat the substrate waiting to enter the sintering furnace in the fixed frame 11. Then the liquid returns to the heat exchanger 19 through the return pipe 12 to complete the heat exchange cycle.

[0026] After cooling is complete, control the second pneumatic rod 17 to extend, and use the push plate 18 to push the silicon nitride substrate onto the first conveying roller 10 on the left. The substrate can then be conveyed to the outside by the rotation of the first conveying roller 10.

[0027] It is worth mentioning that the first sealing door 2, the second sealing door 3, and the third sealing door 16 open and close simultaneously, thereby enabling the feeding, lateral movement of the substrate, and discharge to operate synchronously, ensuring the production line operation.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A roller kiln feeding and discharging device, comprising a kiln body (1), characterized in that: The front side of the kiln body (1) is provided with a sintering chamber and a cooling chamber. The adjacent sides of the sintering chamber and the cooling chamber are connected through a passage. The inner walls of the front and rear sides of the sintering chamber and the cooling chamber are fixedly connected with a second mounting plate (14). The adjacent sides of the two second mounting plates (14) are rotatably connected with a plurality of second conveying rollers (15). The front side of the second mounting plate (14) located on the front side is fixedly connected with a plurality of first mounting plates (9). The adjacent sides of every two cooperating first mounting plates (9) are rotatably connected with a plurality of first conveying rollers (10).

2. The roller kiln feeding and discharging device according to claim 1, characterized in that: The upper ends of the sintering chamber and the cooling chamber are provided with a first sliding groove. The front side of the sintering chamber is provided with a first closed door (2) and the front side of the cooling chamber is provided with a second closed door (3). The first closed door (2) and the second closed door (3) are slidably connected to the first sliding groove. The upper ends of the first closed door (2) and the second closed door (3) are fixedly connected with a first vertical plate (4). The upper end of the first vertical plate (4) extends to the outside. The adjacent sides of the two first vertical plates (4) are fixedly connected with a connecting rod (5).

3. The roller kiln feeding and discharging device according to claim 2, characterized in that: The upper end of the passage is provided with a second sliding groove, and the passage is provided with a third sealing door (16). The third sealing door (16) is slidably connected to the second sliding groove. The upper end of the third sealing door (16) is fixedly connected with a second vertical plate (6). The second vertical plate (6) and the first vertical plate (4) located on the right side are jointly fixedly connected with an L-shaped block (7). The upper end of the kiln body (1) is fixedly connected with a first pneumatic rod (8). The telescopic end of the first pneumatic rod (8) is fixedly connected to the lower end of the L-shaped block (7).

4. The roller kiln feeding and discharging device according to claim 1, characterized in that: The second mounting plate (14) located on the front side has two openings. The rear inner wall of the cooling chamber is fixedly connected to a second pneumatic rod (17), and the telescopic end of the second pneumatic rod (17) is fixedly connected to a push plate (18).

5. The roller kiln feeding and discharging device according to claim 1, characterized in that: A heat exchanger (19) is embedded in the left inner wall of the cooling chamber.

6. The roller kiln feeding and discharging device according to claim 5, characterized in that: A circulating pump (20) is installed on the right side of the heat exchanger (19). The upper ends of the two first mounting plates (9) on the right side are fixedly connected to a fixing frame (11). The inner walls of the left and right sides of the fixing frame (11) are equipped with heat-conducting hollow plates. The liquid inlet of the circulating pump (20) is connected to the liquid outlet of the heat exchanger (19). The liquid outlet of the circulating pump (20) is connected to the rear space of the two heat-conducting hollow plates through a liquid inlet pipe (13). The rear space of the two heat-conducting hollow plates is connected to the liquid inlet of the heat exchanger (19) through a return pipe (12). The liquid inlet pipe (13) and the return pipe (12) are both three-way pipes.

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