Air exhaust system of carbon fiber hard felt oven

Abstract

The utility model discloses a carbon fiber hard felt oven exhaust system which comprises an oven body and a combustion chamber, the combustion chamber is installed on the side wall of the oven body, an air supply fan is installed on the combustion chamber, a main air supply pipe is installed on the inner wall of the oven body, and side air supply pipes are installed on the two sides of the oven body. Two bottom air supply pipes are further installed at the bottom of the oven body, the side air supply pipes and the bottom air supply pipes are connected with the main air supply pipe, the air supply fan is connected with the main air supply pipe through a pipeline, a containing assembly used for containing the carbon fiber hard felt is arranged in the oven body, and a gas collecting hood is installed at the top of the oven body. A gas collecting hood is installed on the top wall of the oven body, a gas exhaust hole is formed in the top wall in the oven body and communicates with the gas collecting hood, an exhaust fan used for exhausting gas is installed on the side wall of the gas collecting hood, and an exhaust pipe is installed on a gas outlet of the exhaust fan. And combustible gas can be immediately discharged in the drying process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oven exhaust, especially relates to a carbon fiber hard felt oven exhaust system. BACKGROUND

[0002] High-temperature oven and curing furnace are widely used in aerospace, automobile lightweight, curing of composite material products, bonding and other industries. The carbon fiber curing oven is a device for curing and drying the carbon fiber felt after gluing. The purpose of drying is mainly to remove excess moisture and organic solvents by heating, so that the soft felt after gluing is cured and shaped.

[0003] Its working principle is: electric heating + hot air circulation, after setting the parameters and temperature section, the hot air circulation system starts, the electric heating starts, the circulating air working mode is that the oven two sides send air through the internal circulating air duct, and the working area top returns air. The oven two sides send air uniformly through the air duct, and the fan sends hot air into the room through the two sides air duct, and forms hot air flow around the workpiece, the return air duct is arranged at the top of the oven, the hot air reenters the air supply fan group through the return air system, and the hot air is circulated and heated. Each cycle heats once until the required temperature is reached.

[0004] Problems and defects of the existing oven:

[0005] ① During the curing process of carbon fiber insulation felt, the glue curing is a process of small molecules undergoing coagulation reaction to produce macromolecules, and a large amount of heat energy is released. The heat storage effect of the insulation material is good, and a large amount of heat is absorbed by the insulation material during long time high temperature drying process and cannot be discharged, resulting in high temperature of the insulation material, which is easy to cause process stop due to overtemperature, and even natural phenomenon of the insulation material.

[0006] ② The traditional oven hot circulating air is side air inlet and top air suction, and the dehumidification effect is not good. Because the heat is from bottom to top, the bottom temperature is not enough, resulting in poor bottom curing effect.

[0007] ③ The waste gas generated by drying is generally flammable and explosive gas, which can easily cause safety accidents if not timely removed.

[0008] The equipment drying and curing process involved in the patent ensures the uniformity of the curing and drying temperature. The insulation material is uniformly heated and completely cured. Utility model content

[0009] The utility model aims at providing a carbon fiber hard felt oven exhaust system, which solves the problems raised in the above background technology.

[0010] The above technical purpose of the utility model is realized by the following technical scheme:

[0011] The carbon fiber hard felt oven exhaust system comprises an oven body and a combustion chamber, the combustion chamber is installed on the side wall of the oven body, a supply fan is installed on the combustion chamber, a main supply air duct is installed on the inner wall of the oven body, side supply air ducts are installed on both sides of the oven body, two bottom supply air ducts are also installed on the bottom of the oven body, the side supply air ducts and the bottom supply air ducts are connected with the main supply air duct, the supply fan is connected with the main supply air duct through a pipeline, a placing assembly for placing carbon fiber hard felt is arranged in the oven body, a gas collecting hood is installed on the top of the oven body, an exhaust hole is formed in the inner top wall of the oven body, the exhaust hole is communicated with the gas collecting hood, an exhaust fan is installed on the side wall of the gas collecting hood, the exhaust fan is connected with the inside of the gas collecting hood through a pipeline, and an exhaust pipe is installed on the air outlet of the exhaust fan.

[0012] Preferably, the placing assembly comprises a plurality of support rods and a plurality of fixing plates, each fixing plate is fixed on both sides of each support rod, the support rods are fixed on the side wall of the oven body through the fixing plates, the support rods are arranged in pairs of symmetry in the oven body, a support frame is slidably arranged between two opposite support rods, the support frame is of a hollow structure, and the carbon fiber hard felt is arranged on the support frame.

[0013] Preferably, air outlets are formed on the opposite surfaces of the carbon fiber hard felt, exhaust louvers are installed on the air outlets, and air diffusers are also installed on the bottom supply air ducts and are uniformly provided with air holes.

[0014] Preferably, a temperature sensor is also installed on the oven body, and the sensing end of the temperature sensor is arranged in the oven body.

[0015] Preferably, a combustible gas alarm is installed on the gas collecting hood, and the sensing end of the combustible gas alarm is arranged in the gas collecting hood.

[0016] Preferably, a control box is also arranged on the side wall of the oven body, and the control box is electrically connected with the temperature sensor and the combustible gas alarm.

[0017] Advantages: the temperature uniformity in the oven can be effectively ensured by the bottom and side simultaneous air supply mode; the internal temperature of the oven can be adjusted by the heating power of the combustion chamber, the power of the supply fan and the power of the exhaust fan; combustible gas can be immediately discharged during the drying process, the discharged gas is detected by the combustible gas alarm, when the combustible gas concentration is too high, the system will alarm and stop to prevent safety impact; the drying does not produce circulating air, the product temperature will not be higher than the ambient temperature, and the product can be immediately discharged, and the product self-ignition phenomenon will not occur. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Structure diagram for an embodiment;

[0019] Fig. 2 Structure diagram for an embodiment for showing the removal of the side panel of the combustion chamber;

[0020] Fig. 3 Structure diagram for an embodiment for showing the internal structure of the oven body;

[0021] Fig. 4 Structure diagram for an embodiment for showing the internal structure of the oven body from the remaining perspective;

[0022] Fig. 5 Assembly diagram for an embodiment for showing the assembly of the main air supply duct, the side air supply duct, and the bottom air supply duct.

[0023] Reference signs: 1, oven body; 2, combustion chamber; 3, air supply fan; 4, main air supply duct; 5, side air supply duct; 6, bottom air supply duct; 7, placement assembly; 8, gas collection cover; 9, exhaust hole; 10, exhaust fan; 11, support rod; 12, fixed plate; 13, support frame; 14, air outlet; 15, exhaust louver; 16, air diffuser plate; 17, temperature sensor; 18, combustible gas alarm; 19, control box. DETAILED DESCRIPTION

[0024] See Figs. 1 to 5 As shown in the drawings, a carbon fiber hard felt oven exhaust system includes an oven body 1 and a combustion chamber 2. The oven body 1 is provided with a placement assembly 7 for placing carbon fiber hard felt. The placement assembly 7 includes a plurality of support rods 11 and a plurality of fixed plates 12. Each fixed plate 12 is fixed on both sides of each support rod 11. The support rods 11 are fixed on the side walls of the oven body 1 through the fixed plates 12. The fixed plates 12 are fixed on the inner walls of the oven body 1 through bolts. The support rods 11 are arranged symmetrically in pairs inside the oven body 1. A support frame 13 is slidably arranged between two opposite support rods 11. The support frame 13 is of a hollow structure. The support frame 13 is provided with carbon fiber hard felt. When it is necessary to dry the carbon fiber hard felt, each carbon fiber hard felt to be dried can be placed on the support frame 13. The support frame 13 is pushed into the oven through a lifting device. The support frame 13 is supported by the support rods 11 on both sides. The lifting device can be a forklift. Two limiting plates are installed at the bottom of the support frame 13 to facilitate lifting of the support frame 13. The support frame 13 and the support rods 11 are provided with three groups. Therefore, there are three groups of carbon fiber hard felt in the oven body 1 for drying.

[0025] The combustion chamber 2 is installed on the side wall of the oven body 1, when the carbon fiber hard felt is placed into the oven body 1, the oven body 1 can be closed, the combustion chamber 2 is started, the combustion chamber 2 can heat the air, the combustion chamber 2 is installed with the air supply fan 3, the inner wall of the oven body 1 is installed with the main air supply pipe 4, the both sides of the oven body 1 are installed with the side air supply pipe 5, the bottom of the oven body 1 is also installed with two bottom air supply pipes 6, the side air supply pipe 5 and the bottom air supply pipe 6 are connected with the main air supply pipe 4, the air supply fan 3 is connected with the main air supply pipe 4 through the pipeline, when the combustion chamber 2 is started, the air supply fan 3 can be started, the air supply fan 3 adopts the frequency conversion speed regulation fan, so that the power can be adjusted according to the actual demand, the air supply fan 3 can discharge the air heated by the combustion chamber 2 into the main air supply pipe 4, the main air supply pipe 4 can discharge the gas into each side air supply pipe and the bottom air supply pipe 6.

[0026] The both side air supply pipes 5 and the bottom air supply pipes 6 are provided with air outlets 14 on the opposite sides of the carbon fiber hard felt, the air outlets 14 are installed with the exhaust louvers 15, the side air supply pipe 5 and the bottom air supply pipe 6 are connected through the air outlet 14, so that the heated air can be discharged into the oven body 1 to heat the carbon fiber hard felt, the exhaust louvers 15 are installed, so that the air outlet angle can be adjusted according to the need, the side air supply pipe 5 is provided with two pieces on one side, the two side air supply pipes 5 are respectively corresponding to the bottom carbon fiber hard felt and the middle carbon fiber hard felt, because the heat is from bottom to top, the heat discharged from the side air supply pipe 5 can move upward, therefore, the corresponding carbon fiber hard felt at the upper end is not provided with the side air supply pipe 5, so as to prevent the carbon fiber hard felt at the upper end from absorbing a large amount of heat and discharging during the long time high temperature drying process, so that the temperature of the heat preservation material is high, the bottom air supply pipe 6 is also installed with the air diffuser plate 16, the air diffuser plate 16 is uniformly provided with air holes, the air diffuser plate 16 is installed on the bottom air supply pipe 6, so that the gas discharged from the bottom air supply pipe 6 can be more uniformly discharged, so as to facilitate the drying treatment of the carbon fiber hard felt, the setting of the bottom air supply pipe 6 also ensures that the carbon fiber hard felt can be better dried, the bottom and side air supply mode can effectively ensure the uniformity of the temperature in the oven.

[0027] The oven body 1 is installed with the gas collecting hood 8 on the top, the oven body 1 is provided with the exhaust hole 9 on the top wall, the exhaust hole 9 is communicated with the gas collecting hood 8, the exhaust fan 10 is installed on the side wall of the gas collecting hood 8, the exhaust fan 10 is connected with the inside of the gas collecting hood 8 through the pipeline, the exhaust pipe is installed on the air outlet of the exhaust fan 10, when the oven body 1 is working, the exhaust fan 10 also starts, the start of the exhaust fan 10 can pass through the exhaust hole 9, so that the waste gas generated during the drying of the carbon fiber hard felt can be sucked into the gas collecting hood 8 through the exhaust hole 9, and then the waste gas is discharged through the exhaust pipe.

[0028] The combustible gas alarm 18 is installed on the gas collecting hood 8, the sensing end of the combustible gas alarm 18 is arranged in the gas collecting hood 8, the side wall of the oven body 1 is further provided with a control box 19, the control box 19 is electrically connected with the combustible gas alarm 18, but the exhaust gas is discharged through the gas collecting hood 8, passes through the combustible gas alarm 18 to detect the discharged gas, when the combustible gas alarm 18 detects that the combustible gas concentration is too high, data is transmitted to the control box 19, the controller is internally provided with a processor, the processor can process the received data, the system will alarm and stop after processing.

[0029] The oven body 1 is further provided with a temperature sensor 17, the sensing end of the temperature sensor 17 is arranged in the oven body 1, the temperature sensor 17 is arranged on the oven body 1 to detect the temperature in the oven body 1, the temperature sensor 17 is electrically connected with the control box 19, the data of the temperature sensor 17 is processed through the control box 19, the exhaust fan 10 and the air supply fan 3 are driven by variable frequency motors, the exhaust fan 10 and the air supply fan 3 are electrically connected with the control box 19, the control box 19 sets the running program when starting, the control box 19 controls the exhaust fan 10 and the air supply fan 3, the control box 19 adjusts the motor power according to the set program temperature to adjust the power of the exhaust fan 10 and the air supply fan 3 to control the temperature in the oven body 1.

Claims

1. A carbon fiber rigid felt oven exhaust system, comprising an oven body (1) and a combustion chamber (2), characterized in that, The combustion chamber (2) is installed on the side wall of the oven body (1). A blower (3) is installed on the combustion chamber (2). A main air supply duct (4) is installed on the inner wall of the oven body (1). Side air supply ducts (5) are installed on both sides of the oven body (1). Two bottom air supply ducts (6) are also installed at the bottom of the oven body (1). The side air supply ducts (5) and the bottom air supply ducts (6) are both connected to the main air supply duct (4). The blower (3) is connected to the main air supply duct through a pipe. The oven body (1) is connected by a duct (4). The oven body (1) is equipped with a placement component (7) for placing carbon fiber felt. The top of the oven body (1) is equipped with a gas collection hood (8). The top wall of the oven body (1) is provided with an exhaust hole (9). The exhaust hole (9) is connected to the gas collection hood (8). An exhaust fan (10) is installed on the side wall of the gas collection hood (8). The exhaust fan (10) is connected to the inside of the gas collection hood (8) through a pipe. An exhaust pipe is installed on the outlet of the exhaust fan (10).

2. The exhaust system for a carbon fiber rigid felt drying oven according to claim 1, characterized in that, The placement assembly (7) includes several support rods (11) and several fixing plates (12). Each fixing plate (12) is fixed on both sides of each support rod (11). The support rods (11) are fixed to the side wall of the oven body (1) through the fixing plates (12). The support rods (11) are arranged symmetrically in pairs inside the oven body (1). A support frame (13) is slidably arranged between two opposite support rods (11). The support frame (13) has a hollow structure and is provided with carbon fiber hard felt.

3. The exhaust system for a carbon fiber rigid felt oven according to claim 2, characterized in that, Both side air supply ducts (5) and bottom air supply ducts (6) have air outlets (14) on their opposite surfaces to the carbon fiber felt. The air outlets (14) are equipped with exhaust louvers (15). The bottom air supply ducts (6) are also equipped with diffusers (16), and the diffusers (16) are evenly distributed with air holes.

4. The exhaust system for a carbon fiber rigid felt drying oven according to claim 1, characterized in that, A temperature sensor (17) is also installed on the oven body (1), and the sensing end of the temperature sensor (17) is located inside the oven body (1).

5. The exhaust system for a carbon fiber rigid felt drying oven according to claim 4, characterized in that, A combustible gas alarm (18) is installed on the gas collection hood (8), and the sensing end of the combustible gas alarm (18) is located inside the gas collection hood (8).

6. The exhaust system for a carbon fiber rigid felt drying oven according to claim 5, characterized in that, The side wall of the oven body (1) is also provided with a control box (19), which is electrically connected to the temperature sensor (17) and the combustible gas alarm (18).

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