A kind of exhaust device for agricultural machinery v-belt oven

Abstract

The utility model relates to the technical field of exhaust device, and disclose a kind of exhaust device for agricultural machinery triangular belt oven. Including oven, the oven top surface is equipped with exhaust port, the exhaust port below is provided with air door, the oven is detachably installed with first air pipe by first bolt, the other end of the first air pipe is detachably installed with filter screen by second bolt, the other side of the filter screen is detachably installed with second air pipe, the side of the second air pipe away from filter screen is fixedly connected with centrifugal fan, the end of the centrifugal fan is provided with air outlet, by setting first bolt and second bolt, so that air pipe can be disassembled at any time to clean and maintain, by setting filter screen with a plurality of filter holes, the mixed dust and particulate matter in exhaust gas are prevented from entering fan, causing fan wear, prolonging the service life of the equipment, ensuring production efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the field of ventilation device technology, specifically to a ventilation device for a V-belt drying oven for agricultural machinery. Background Technology

[0002] The exhaust system of a V-belt drying oven for agricultural machinery is a key piece of equipment for ensuring a safe production environment and stable processes. Its core function is to forcefully exhaust high-temperature moisture and volatile substances from the oven in a timely manner, preventing water vapor condensation from affecting the vulcanization quality of the V-belts, while maintaining temperature uniformity within the oven. Traditional exhaust systems often use a straight-through duct design, which, while meeting basic ventilation requirements, reveals problems such as dust accumulation and oil adhesion during long-term operation. Especially when handling rubber products containing fillers such as carbon black, particulate matter mixed in the exhaust gas easily forms caking in the duct, not only reducing exhaust efficiency but also potentially causing backflow pollution. To address the cleaning and maintenance challenges of the exhaust system for agricultural machinery V-belt drying ovens, developing an easily disassembled exhaust system with a high-efficiency filter is crucial. This not only effectively intercepts dust and particulate matter, preventing them from entering the fan and causing wear, thus extending equipment lifespan, but also significantly reduces maintenance costs, minimizes downtime, and ensures stable production efficiency and product quality. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an exhaust device for a V-belt drying oven in agricultural machinery, which has the advantages of easy disassembly and cleaning, effective interception of dust and particulate matter, and reduced heat energy loss, thus solving the aforementioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an exhaust device for a triangular belt drying oven for agricultural machinery, comprising an oven, an exhaust port on the top surface of the oven, a damper below the exhaust port, a first air duct detachably mounted on the oven via a first bolt, a filter screen detachably mounted on the other end of the first air duct via a second bolt, a second air duct detachably mounted on the other side of the filter screen, a centrifugal fan fixedly connected to the side of the second air duct away from the filter screen, and an air outlet at the end of the centrifugal fan.

[0005] As a preferred embodiment of this utility model, racks are fixedly connected to one side of each of the two sets of dampers, and the two sets of racks are connected by a gear located in the middle. A rotating shaft is fixedly connected to the inner wall of the gear, and a servo motor is rotatably connected to the rotating shaft.

[0006] As a preferred embodiment of this utility model, a temperature sensor is fixedly installed on the top surface of the inner wall of the oven, and a PLC controller is fixedly installed on the outer surface of the oven, wherein the PLC controller is electrically connected to the temperature sensor.

[0007] As a preferred embodiment of this utility model, the first bolt vertically penetrates the first air duct and connects to the oven, and the second bolt sequentially penetrates the first air duct, the filter screen, and connects to the second air duct.

[0008] As a preferred embodiment of this utility model, the filter screen has a plurality of filter holes.

[0009] As a preferred technical solution of this utility model, the air outlet has a U-shaped structure.

[0010] Compared with the prior art, this utility model provides an exhaust device for a V-belt drying oven in agricultural machinery, which has the following beneficial effects:

[0011] 1. This utility model allows the air duct to be disassembled for cleaning and maintenance at any time by setting the first bolt and the second bolt. By setting a filter screen with several filter holes, it prevents dust and particulate matter mixed in the exhaust gas from entering the fan and causing fan wear, thereby extending the service life of the equipment and ensuring production efficiency and stability.

[0012] 2. This utility model uses a temperature sensor to detect the air temperature inside the oven in real time and transmits the data to a PLC controller. The PLC compares and analyzes the received temperature signal with a preset threshold. If the temperature is too high, it controls the servo motor to drive the exhaust vent damper to increase the opening and closing angle to accelerate heat dissipation. Conversely, when the temperature is too low, it reduces the opening and closing angle of the damper to reduce heat loss. Through a closed-loop control system, the oven temperature is dynamically balanced, thereby achieving the dual goals of energy saving and precise temperature control. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the exhaust device for a triangular belt drying oven in agricultural machinery according to the present invention.

[0014] Figure 2 This is a schematic diagram of the overall structure of an exhaust device for a triangular belt drying oven for agricultural machinery according to the present invention;

[0015] Figure 3 Exploded view of an exhaust device for a triangular belt drying oven in agricultural machinery according to the present invention;

[0016] Figure 4 This is a schematic diagram of the exhaust damper structure for an agricultural machinery V-belt drying oven.

[0017] The components include: 1. Oven; 2. Exhaust vent; 3. Damper; 301. Rack; 302. Gear; 303. Shaft; 304. Servo motor; 4. First bolt; 5. First duct; 6. Second bolt; 7. Filter screen; 8. Second duct; 9. Centrifugal fan; 10. Air outlet; 11. Temperature sensor; 12. PLC controller; 13. Filter holes. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figure 1-4A ventilation device for an agricultural machinery V-belt drying oven includes an oven 1. The agricultural machinery V-belt continuously circulates heat inside the oven 1, generating high-temperature humid air and releasing volatile particulate matter such as dust. An exhaust vent 2 is provided on the top surface of the oven 1. The high-temperature humid air and volatile particulate matter enter the ventilation device through the exhaust vent 2. A damper 3 is provided below the exhaust vent 2. A first air duct 5 is detachably installed on the oven 1 via a first bolt 4. The first bolt 4 vertically penetrates the first air duct 5 and connects it to the oven 1. By unscrewing the first bolt 4, the first air duct 5 can be separated from the oven 1 for easy cleaning and maintenance. A filter screen 7 is detachably installed at the other end of the first air duct 5 via a second bolt 6. The filter screen 7 has several filter holes 13 on its surface. The filter holes 13 prevent dust and particulate matter mixed in the exhaust gas from entering the centrifugal fan 9, preventing fan wear, extending the service life of the equipment, and ensuring production efficiency and stability. The other side of the filter screen 7 is detachably equipped with a second air duct 8. The second bolt 6 passes through the first air duct 5, the filter screen 7 and the second air duct 8 in sequence. By unscrewing the second bolt 6, the first air duct 5, the filter screen 7 and the second air duct 8 can be separated so that the filter screen 7 can be cleaned and maintained at any time. A centrifugal fan 9 is fixedly connected to the side of the second air duct 8 away from the filter screen 7. The centrifugal fan 9 is driven by an external power source. An air outlet 10 is set at the end of the centrifugal fan 9. After the high temperature and humidity and volatile particulate matter enter the first exhaust duct 5 from the oven 1 cavity, they first flow along the duct. When they reach the centrifugal fan 9, they are "drawn in" by the negative pressure generated by the rotation of the fan impeller. Then they are pressurized and discharged to the external environment through the air outlet 10.

[0022] Specifically, racks 301 are fixedly connected to one side of each of the two sets of dampers 3, and the two sets of racks 301 are meshed together by a gear 302 located in the middle. A rotating shaft 303 is fixedly connected to the inner wall of the gear 302, and a servo motor 304 is rotatably connected to the rotating shaft 303. When the servo motor 304 operates, the rotating shaft 303 drives the gear 302 to rotate, and the two sets of racks meshing with the gear 302 move in opposite directions, realizing the opening and closing of the dampers 3. A temperature sensor 1 is fixedly installed on the top surface of the inner wall of the oven 1. 1. A PT100 temperature sensor is selected. A PLC controller 12, a Siemens S7-1200, is fixedly mounted on the outer surface of the oven 1. The PLC controller 12 is electrically connected to the temperature sensor 11. The PT100 temperature sensor 11 detects the temperature inside the oven 1 in real time and transmits the resistance signal to the temperature transmitter via a 3-wire connection. The transmitter converts the signal into a 4-20mA standard current signal, which is then transmitted to the Siemens S7-1200 via shielded twisted-pair cable. The PLC controller 12 has an analog input module. The PLC controller 12 converts the current signal into a digital quantity and compares it with a preset threshold. After PID calculation, it sends control commands to the servo driver via the high-speed pulse output PROFINET bus. This drives the servo motor 304 to adjust the damper opening. At the same time, the encoder feeds back the actual position to the driver to form a closed-loop control. If the temperature is detected to be too high, the servo motor 304 is controlled to drive the damper 3 to increase the opening and closing degree to accelerate heat dissipation. Conversely, when the temperature is too low, the opening and closing angle of the damper 3 is reduced to reduce heat loss. The closed-loop control system achieves dynamic balance of the oven 1 temperature, thereby achieving the dual purpose of energy saving and precise temperature control.

[0023] Specifically, the air outlet 10 has a U-shaped structure. When the exhaust system is suddenly started or stopped, the U-shaped structure can alleviate the airflow impact, reduce the "backflow" phenomenon, avoid the backflow of outside air or pollutants, and reduce blockage and maintenance needs.

[0024] During use, the agricultural machinery V-belt continuously circulates heat inside the oven 1, generating high-temperature humid air and releasing volatile particulate matter such as dust. The high-temperature humid air and volatile particulate matter enter the exhaust device through the exhaust port 2. After entering the first exhaust pipe 5 from the exhaust port 2, the high-temperature humid air and volatile particulate matter flow along the pipe and are filtered by the filter screen 7. The filter holes 13 prevent the dust and particulate matter mixed in the exhaust gas from entering the centrifugal fan 9, preventing fan wear, extending the service life of the equipment, and ensuring production efficiency and stability. When it reaches the centrifugal fan 9, it is "drawn in" by the negative pressure generated by the rotation of the fan impeller, and then discharged into the external environment through the exhaust port 10 under pressure. By unscrewing the first bolt 4, the first air pipe 5 can be separated from the oven 1 for easy cleaning and maintenance of the first air pipe 5. By unscrewing the second bolt 6, the first air pipe 5, the filter screen 7, and the second air pipe 8 can be separated for easy cleaning and maintenance of the filter screen 7.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a V-belt drying oven in agricultural machinery, comprising a drying oven (1), characterized in that: The oven (1) has an exhaust vent (2) on its top surface and a damper (3) below the exhaust vent (2). The oven (1) is detachably mounted with a first air duct (5) by a first bolt (4). A filter screen (7) is detachably mounted on the other end of the first air duct (5) by a second bolt (6). A second air duct (8) is detachably mounted on the other side of the filter screen (7). A centrifugal fan (9) is fixedly connected to the side of the second air duct (8) away from the filter screen (7). An air outlet (10) is provided at the end of the centrifugal fan (9).

2. The exhaust device for an agricultural machinery V-belt drying oven according to claim 1, characterized in that: A rack (301) is fixedly connected to one side of each of the two sets of dampers (3), and the two sets of racks (301) are connected by meshing through a gear (302) located in the middle. A rotating shaft (303) is fixedly connected to the inner wall of the gear (302), and a servo motor (304) is rotatably connected to the rotating shaft (303).

3. The exhaust device for an agricultural machinery V-belt drying oven according to claim 1, characterized in that: A temperature sensor (11) is fixedly installed on the top surface of the inner wall of the oven (1), and a PLC controller (12) is fixedly installed on the outer surface of the oven (1). The PLC controller (12) is electrically connected to the temperature sensor (11).

4. The exhaust device for an agricultural machinery V-belt drying oven according to claim 1, characterized in that: The first bolt (4) vertically passes through the first air duct (5) and connects to the oven (1), and the second bolt (6) passes through the first air duct (5) and the filter screen (7) in sequence and connects to the second air duct (8).

5. The exhaust device for an agricultural machinery V-belt drying oven according to claim 1, characterized in that: The filter screen (7) has several filter holes (13) on its surface.

6. The exhaust device for an agricultural machinery V-belt drying oven according to claim 1, characterized in that: The air outlet (10) has a U-shaped structure.

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