Furnace mouth air pressure control mechanism of enameled wire oven

Abstract

The utility model discloses an enameled wire oven mouth air pressure control mechanism, which belongs to the technical field of oven mouth air pressure control, and is characterized in that the surface of an oven body is provided with an exhaust port, the side surface of the exhaust port is fixedly provided with an induced draft fan, one end of the exhaust port is fixedly provided with a waste gas purification box, and the side surface of the oven body is provided with an air door body; an air inlet is formed in one end of the air door body, an adjusting mechanism and a preheating box are fixedly installed in the air inlet, and an air guiding pipe fixedly communicates with the interior of the preheating box. According to the furnace mouth air pressure control device, the air pressure is further controlled, the use stability of the furnace mouth air pressure control device is improved, cold air entering the oven body from the outside can be heated through the arranged air guide pipe and the arranged preheating box, then the heat loss of the cold air entering the oven from the outside is reduced, and the cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of furnace mouth air pressure control technology, and more specifically, to a furnace mouth air pressure control mechanism for enameled wire drying furnaces. Background Technology

[0002] The air pressure control at the furnace inlet plays a very important role in the process control of enameled wire production. The air pressure control at the furnace inlet and outlet is mainly achieved through two means: the furnace fan speed and the damper adjustment.

[0003] Currently, the damper adjustment components of commonly used furnace mouth air pressure control devices have insufficient control stability during actual control, and cannot heat the cold air entering the valve from the outside, resulting in large heat loss inside the furnace. For example, a furnace mouth air pressure control device for enameled wire drying furnace disclosed in CN118999133A includes a base, furnace body, curing reaction tube, damper, micro differential pressure sensor, ash discharge component and control console component. The two ends of the curing reaction tube are coaxially fixed and connected to the feed pipe and the discharge pipe, respectively; a screw is provided on one side of the damper.

[0004] As can be seen from the above-disclosed scheme, the damper is controlled by a screw. However, because external impurities can easily enter, the damper sliding gap may become stuck, affecting the movement of the damper and thus reducing the stability of the air pressure control device. Furthermore, the direct entry of external cold air into the oven through the damper will increase the heat loss inside the oven, thereby increasing the energy consumption of electric heating and raising the operating cost. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a furnace mouth air pressure control mechanism for enameled wire drying ovens. This furnace mouth air pressure control mechanism, through the setting of an adjusting motor, a fixed plate, and a rotating plate, can adjust the air intake volume by adjusting the area of ​​the fixed hole, thereby controlling the air pressure, increasing the stability of the furnace mouth air pressure control device. Furthermore, through the setting of an air duct and a preheating box, the cold air entering the oven body can be heated, thereby reducing the heat loss of the external cold air entering the oven and effectively reducing costs.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A furnace mouth air pressure control mechanism for enameled wire drying oven includes a drying oven body. An exhaust port is provided on the surface of the drying oven body. An induced draft fan is fixedly installed on the side of the exhaust port. A waste gas purification box is fixedly installed at one end of the exhaust port. An air damper body is provided on the side of the drying oven body. An air inlet is provided at one end of the air damper body. An adjustment mechanism and a preheating box are fixedly installed inside the air inlet. An induced draft pipe is fixedly connected inside the preheating box. The other end of the induced draft pipe is connected to the inside of the waste gas purification box. This furnace mouth air pressure control mechanism, through the provided adjustment motor, fixed plate, and rotating plate, allows adjustment of the air intake volume by adjusting the area of ​​the fixed hole, thereby controlling the air pressure. This increases the stability of the furnace mouth air pressure control device. Furthermore, the induced draft pipe and preheating box can heat the cold air entering the drying oven body from the outside, thereby reducing heat loss from the cold air entering the drying oven and effectively reducing costs.

[0008] Furthermore, the adjustment mechanism includes a fixed plate, the outer side of which is fixedly connected to the inner wall of the air inlet. The surface of the fixed plate has annularly distributed fixing holes. An adjustment motor, which is a stepper motor, is fixedly installed in the middle of the fixed plate and can control the rotating plate to rotate step by step.

[0009] Furthermore, the exhaust gas purification box is equipped with an activated carbon filter element, which divides the interior of the exhaust gas purification box into a filtration chamber and an exhaust chamber. A drain pipe is provided on one side of the filtration chamber, and the exhaust chamber is fixedly connected to a first exhaust pipe and a second exhaust pipe. The exhaust gas purification box can purify the discharged exhaust gas and avoid air pollution.

[0010] Furthermore, the output end of the regulating motor is fixedly connected to a rotating shaft, and a rotating plate is fixedly sleeved on the surface of the rotating shaft. The surface of the rotating plate has annularly distributed movable holes, and a limit ring is fixedly connected to the outer side of the rotating plate. The surface of the rotating plate is movably connected to the surface of the fixed plate. When the rotating plate rotates, the movable holes and the fixed holes are misaligned, thereby controlling the air intake of the fixed holes.

[0011] Furthermore, the top of the preheating box has an installation hole, one end of which is fixedly connected to a heating chamber. One side of the inner wall of the heating chamber has a through hole, and the other side of the inner wall of the heating chamber has a guide hole. The heating chamber is made of thermally conductive metal, which can mix external cold air with the introduced hot exhaust gas, thereby heating the external cold air.

[0012] Furthermore, one end of the first exhaust pipe is connected to a waste gas heat recovery pipe, and one end of the second exhaust pipe is fixedly connected to one end of the intake pipe, so that the waste gas heat can be recovered and utilized.

[0013] Furthermore, the inner wall of the air inlet has a limiting groove, and the inner wall of the limiting groove is slidably connected to the surface of the limiting ring. The limiting ring is made of high-temperature resistant elastic material, which can automatically fix the rotation position and ensure the rotational stability of the rotating plate.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution, through the setting of the regulating motor, the fixing plate and the rotating plate, can adjust the air intake by adjusting the area of ​​the fixing hole, thereby controlling the air pressure and increasing the stability of the furnace mouth air pressure control device.

[0016] (2) This solution can heat the cold air entering the oven body from the outside by setting the air intake pipe and preheating box, thereby reducing the heat loss of the cold air entering the oven and effectively reducing the cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation structure of the damper and air duct of this utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the adjustment mechanism;

[0020] Figure 4 This is a schematic diagram of the preheating box structure of this utility model;

[0021] Figure 5 for Figure 2 A cross-sectional view of the damper structure.

[0022] Explanation of the labels in the diagram:

[0023] 1. Oven body; 2. Exhaust port; 21. Waste gas purification box; 22. Exhaust fan; 23. First exhaust pipe; 24. Second exhaust pipe; 25. Exhaust pipe; 3. Damper body; 31. Air inlet; 32. Limiting groove; 4. Adjustment mechanism; 41. Fixing plate; 42. Fixing hole; 43. Adjustment motor; 44. Rotating plate; 45. Movable hole; 46. Limiting ring; 5. Preheating box; 51. Heating chamber; 52. Through hole; 53. Guide hole; 54. Mounting hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figure 1-5 A furnace mouth air pressure control mechanism for enameled wire drying oven includes a drying oven body 1. The drying oven body 1 is also equipped with components such as a speed-regulating fan, a micro-differential pressure sensor, and a PLC controller. The air pressure can be adjusted by regulating the motor speed, which is existing technology. The PLC controller is connected to the regulating motor 43, and the PLC controller can control the regulating motor 43 to work. An exhaust port 2 is provided on the surface of the drying oven body 1. An induced draft fan 22 is fixedly installed on the side of the exhaust port 2. The blades of the induced draft fan 22 are located inside the exhaust port 2 to facilitate the exhaust gas to be drawn out and then introduced into the exhaust gas purification box 21. The exhaust gas purification box 21 is fixedly installed at one end of the exhaust port 2. An air damper body 3 is provided on the side of the drying oven body 1. An air inlet 31 is provided at one end of the air damper body 3. The inner wall of the inlet 31 has a limiting groove 32, and the inner wall of the limiting groove 32 is slidably connected to the surface of the limiting ring 46. The limiting ring 46 is made of high temperature resistant elastic material and can automatically fix the rotation position, ensuring the rotational stability of the rotating plate 44. The inside of the air inlet 31 is fixedly installed with an adjustment mechanism 4 and a preheating box 5. The adjustment mechanism 4 includes a fixing plate 41, the outer side of the fixing plate 41 is fixedly connected to the inner wall of the air inlet 31, and the surface of the fixing plate 41 has annularly distributed fixing holes 42. The middle position of the fixing plate 41 is fixedly installed with an adjustment motor 43, which is a stepper motor and can control the rotating plate 44 to rotate step by step. The inside of the preheating box 5 is fixedly connected with an air intake pipe 25, and the other end of the air intake pipe 25 is connected to the inside of the exhaust gas purification box 21.

[0027] An activated carbon filter element is installed inside the exhaust gas purification box 21, which divides the interior of the exhaust gas purification box 21 into a filtration chamber and an exhaust chamber. A drain pipe is provided on one side of the filtration chamber, and the exhaust chamber is fixedly connected to a first exhaust pipe 23 and a second exhaust pipe 24. The exhaust gas purification box 21 can purify the exhaust gas and avoid air pollution. A rotating shaft is fixedly connected to the output end of the regulating motor 43, and a rotating plate 44 is fixedly sleeved on the surface of the rotating shaft. The surface of the rotating plate 44 has annularly distributed movable holes 45. A limit ring 46 is fixedly connected to the outer side of the rotating plate 44. The surface of the rotating plate 44 is movably connected to the surface of the fixed plate 41. When the rotating plate 44 rotates, the movable holes 45 are misaligned with the fixed holes 42, thereby controlling the air intake of the fixed holes 42.

[0028] The top of the preheating box 5 has a mounting hole 54, one end of which is fixedly connected to the heating chamber 51. One side of the inner wall of the heating chamber 51 has a through hole 52, which has the function of interception and filtration to prevent larger impurities from entering the air inlet 31. The other side of the inner wall of the heating chamber 51 has a guide hole 53. The heating chamber 51 is made of thermally conductive metal, which can mix the external cold air with the introduced hot waste gas, thereby heating the external cold air. One end of the first exhaust pipe 23 is connected to the waste gas heat recovery pipe, and one end of the second exhaust pipe 24 is fixedly connected to one end of the exhaust pipe 25, which can recover and utilize the heat of the waste gas.

[0029] When in use, the furnace mouth air pressure control mechanism of this enameled wire drying oven can control the operation of the regulating motor 43. The operation of the regulating motor 43 drives the rotating plate 44 to rotate. The rotation of the rotating plate 44 causes the movable hole 45 to be misaligned with the fixed hole 42, thereby adjusting the area of ​​the fixed hole 42 and controlling the air intake to achieve the purpose of controlling the air pressure. When the external cold air enters the heating chamber 51 through the through hole 52, the purified hot exhaust gas discharged from the air intake pipe 25 collides and mixes with the external cold air, thereby heating the external cold air. The heated external cold air enters the air inlet 31 through the guide hole 53, and then enters the oven body 1 through the fixed hole 42. With the setting of the regulating motor 43, the fixed plate 41, and the rotating plate 44, the air intake can be adjusted by adjusting the area of ​​the fixed hole 42, thereby controlling the air pressure, increasing the stability of the furnace mouth air pressure control device. In addition, with the setting of the air intake pipe 25 and the preheating box 5, the external cold air entering the oven body 1 can be heated, thereby reducing the heat loss of the external cold air entering the oven and effectively reducing costs.

[0030] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A mechanism for controlling the air pressure of the furnace mouth of an enamelled wire baking furnace, comprising a baking furnace body (1), characterized in that: The surface of the oven body (1) is provided with an exhaust port (2), and an induced draft fan (22) is fixedly installed on the side of the exhaust port (2). A waste gas purification box (21) is fixedly installed at one end of the exhaust port (2). A damper body (3) is provided on the side of the oven body (1). An air inlet (31) is provided at one end of the damper body (3). An adjustment mechanism (4) and a preheating box (5) are fixedly installed inside the air inlet (31). An air induced pipe (25) is fixedly connected inside the preheating box (5). The other end of the air induced pipe (25) is connected to the inside of the waste gas purification box (21).

2. The mechanism for controlling the air pressure of the furnace mouth of the enameled wire baking furnace according to claim 1, characterized in that: The adjustment mechanism (4) includes a fixing plate (41), the outer side of which is fixedly connected to the inner wall of the air inlet (31), and the surface of the fixing plate (41) is provided with annularly distributed fixing holes (42), and an adjustment motor (43) is fixedly installed in the middle position of the fixing plate (41).

3. The mechanism for controlling the air pressure of the furnace mouth of the enameled wire baking furnace according to claim 1, characterized in that: The exhaust gas purification box (21) is equipped with an activated carbon filter element, which divides the interior of the exhaust gas purification box (21) into a filtration chamber and an exhaust chamber. A drain pipe is provided on one side of the filtration chamber, and the exhaust chamber is fixedly connected to a first exhaust pipe (23) and a second exhaust pipe (24).

4. The furnace mouth air pressure control mechanism for enameled wire drying oven according to claim 2, characterized in that: The output end of the regulating motor (43) is fixedly connected to a rotating shaft, and a rotating plate (44) is fixedly sleeved on the surface of the rotating shaft. The rotating plate (44) has annularly distributed movable holes (45) on its surface, and a limit ring (46) is fixedly connected to the outer side of the rotating plate (44).

5. The mechanism for controlling the air pressure of the furnace mouth of the enameled wire baking furnace according to claim 1, characterized in that: The preheating box (5) has a mounting hole (54) on its top. One end of the mounting hole (54) is fixedly connected to the heating chamber (51). A through hole (52) is opened on one side of the inner wall of the heating chamber (51), and a guide hole (53) is opened on the other side of the inner wall of the heating chamber (51).

6. The mechanism for controlling the air pressure of the furnace mouth of the enameled wire baking furnace according to claim 3, characterized in that: One end of the first exhaust pipe (23) is connected to a waste gas heat recovery pipe, and one end of the second exhaust pipe (24) is fixedly connected to one end of the exhaust pipe (25).

7. The mechanism for controlling the air pressure of the furnace mouth of the enameled wire baking furnace according to claim 4, characterized in that: The inner wall of the air inlet (31) has a limiting groove (32), and the inner wall of the limiting groove (32) is slidably connected to the surface of the limiting ring (46).

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