Precuring furnace

Abstract

The invention relates to the technical field of pre-curing, and particularly discloses a pre-curing furnace which comprises a furnace body, a box body is arranged in the furnace body, and a feeding port is formed in the box body; the heating assembly is used for heating the workpiece in the box body; the shielding assembly is used for controlling opening and closing of the feeding opening; the heat storage assembly comprises a nitrogen tank, a heat absorption pipe, an exhaust pipe and a first valve, the nitrogen tank is connected with the heat absorption pipe, the heat absorption pipe and the exhaust pipe are arranged in the box body, the heat absorption pipe is connected with the exhaust pipe, the first valve is connected between the heat absorption pipe and the exhaust pipe, and an exhaust hole is formed in the exhaust pipe, so that after the first valve is opened, the heat absorption pipe is communicated with the exhaust pipe; and the heated nitrogen stored in the heat absorption pipe can be discharged into the box body through the exhaust hole in the exhaust pipe. In the process that the feeding port is opened for workpiece feeding and discharging, hot nitrogen stored in the heat absorption pipe can be discharged into the box body, so that heat stored in the nitrogen is reasonably utilized, and rapid loss of the heat in the box body caused by opening of the feeding port is avoided.

Description

Technical Field

[0001] This application relates to the technical field of pre-curing, and in particular to a pre-curing furnace. Background Art

[0002] A pre-curing furnace is a device used for preliminary curing of the surface coating or material of an object. It heats the air or directly heats the object, causing substances such as paints and glues on the object surface to undergo chemical reactions at a certain temperature, thereby achieving the effect of preliminary curing.

[0003] In the existing pre-curing furnace, due to the need for frequent opening and closing to put in or take out workpieces, a large amount of heat is lost. It takes a large amount of electrical energy to raise the temperature in the pre-curing furnace to the required temperature again, so the energy consumption is relatively high. Summary of the Invention

[0004] In order to reduce the impact of the loading and unloading process on the energy consumption of the pre-curing furnace, this application provides a pre-curing furnace.

[0005] The pre-curing furnace provided by this application adopts the following technical solutions: A pre-curing furnace, comprising: A furnace body, in which a plurality of support plates are provided. A plurality of boxes are provided on the support plates. An inlet for the workpiece to enter and exit is provided on one side of the box. A heating component, arranged on the support plate. The heating component is located inside the box and is used to heat the workpiece placed in the box. A shielding component, arranged on the box and used to control the opening and closing of the inlet. A heat storage component, including a nitrogen tank, a heat absorption pipe, an exhaust pipe and a first valve. The nitrogen tank is arranged on the furnace body. The nitrogen tank is connected to the heat absorption pipe. The heat absorption pipe and the exhaust pipe are both fixedly arranged in the box. The heat absorption pipe is connected to the exhaust pipe. The first valve is connected between the heat absorption pipe and the exhaust pipe. A plurality of exhaust holes are spaced along the length direction of the exhaust pipe, so that after the first valve is opened, the heated nitrogen stored in the heat absorption pipe can be discharged into the box through the exhaust holes on the exhaust pipe.

[0006] By adopting the above technical solution, during the pre-curing process, the shielding component closes the feeding port of the box body, and the inside of the box body is heated up. Therefore, the temperature in the box body is relatively high. Since the heat absorption tube is arranged in the box body, the nitrogen gas stored in the heat absorption tube can be heated up. When the shielding component cancels the shielding of the feeding port and the feeding port is opened, the first valve can be opened, and the heated nitrogen gas stored in the heat absorption tube can be discharged into the box body through the exhaust holes on the exhaust pipe, so as to reasonably utilize the heat stored in the nitrogen gas, avoid the rapid loss of heat in the box body caused by the opening of the feeding port, and thus help reduce energy consumption. Since nitrogen gas is an inert gas and does not participate in the reaction during the pre-curing process, it is not easy to affect the pre-curing process.

[0007] Optionally, the shielding component includes a door body and a power telescopic member. The door body is rotatably connected to the feeding port of the box body. The door body is used to block the feeding port. The power telescopic member is arranged between the box body and the door body. One end of the power telescopic member is rotatably connected to the outer wall of the box body, and the other end of the power telescopic member is rotatably connected to the door body.

[0008] By adopting the above technical solution, when the movable end of the power telescopic member extends or retracts, the door body can be rotated, so as to control the opening and closing of the feeding port.

[0009] Optionally, the heating component includes a heating plate and a heat conducting plate located inside the box body. The heating plate is fixedly connected to the support plate, the heat conducting plate is fixedly connected to the top wall of the heating plate, and the top wall of the heat conducting plate is used to place the workpiece.

[0010] By adopting the above technical solution, the heating plate can play a heating role, and the heat conducting plate can play a heat conducting role, so that the heat on the heating plate can be more evenly transferred to the workpiece, thus ensuring the effect of pre-curing treatment.

[0011] Optionally, the box body is vertically slidably arranged on the support plate. A lifting component is arranged on the support plate. The lifting component includes a linear driving member, a pushing block, a roller and a top rod. The linear driving member is fixedly connected to the support plate. The sliding direction of the movable end of the linear driving member is horizontally arranged. The pushing block is fixedly connected to the movable end of the linear driving member. An inclined surface is arranged on the pushing block. The roller is rotatably connected to the box body. The inclined surface is used to abut against the roller, so that when the pushing block slides horizontally, the roller can be pushed to slide vertically. The top rod is located in the box body and is fixedly connected to the bottom wall of the box body. The top end of the top rod passes through the heating plate and the heat conducting plate, and the top end of the top rod is used to abut against the bottom wall of the workpiece.

[0012] By adopting the above technical solution, when the box body slides vertically, it can drive the ejector rod to slide vertically. The top of the ejector rod is used to support the workpiece, which helps the smooth progress of the workpiece loading and unloading process. Under the combined action of the inclined surface on the push block and the roller, the horizontal sliding of the linear drive member can be converted into the vertical sliding of the box body, which helps to reduce the occupied space of the structure and is more convenient.

[0013] Optionally, the heat absorption tube is arranged in a bent shape.

[0014] By adopting the above technical solution, more nitrogen can be stored in the heat absorption tube, so as to store more heat energy.

[0015] Optionally, a preheating tube is fixedly connected to one side of the heat absorption tube in the box body. One end of the preheating tube is connected to the nitrogen tank, the other end of the preheating tube is connected to the exhaust pipe, and a second valve is arranged between the preheating tube and the nitrogen tank.

[0016] By adopting the above technical solution, when the feed port is closed, the workpiece inside the box body is in a pre-curing treatment state, and the second valve is opened. Therefore, the nitrogen in the nitrogen tank can flow into the preheating tube, flow into the exhaust pipe after being heated by the box body, and then be discharged into the box body through the exhaust holes. Therefore, when the pre-curing furnace is just started, the temperature inside the box body is relatively low, and the discharged nitrogen can accelerate the gas flow in the box body, making the heat distribution more uniform. Therefore, the inside of the box body can reach the required state more quickly, which helps to reduce energy consumption.

[0017] Optionally, a first one-way valve is arranged at one end of the heat absorption tube close to the nitrogen tank, and a second one-way valve is arranged at one end of the preheating tube close to the exhaust pipe.

[0018] By adopting the above technical solution, when the feed port is in a closed state, the inside of the box body is in a pre-curing treatment state. At this time, the first valve is closed, and nitrogen is stored in the heat absorption tube. The first one-way valve can limit the reverse flow of nitrogen in the heat absorption tube, avoiding the continuous outflow of nitrogen in the heat absorption tube, resulting in a reduction in the heat absorbed by the nitrogen in the heat absorption tube. When the feed port is in an open state, it is in the state of workpiece loading and unloading. At this time, the first valve is opened and the second valve is closed. The heated nitrogen in the heat absorption tube can be discharged through the exhaust pipe. At this time, the second one-way valve can limit the reverse flow of nitrogen in the heat absorption tube, avoiding nitrogen flowing into the preheating tube, so that all the heated nitrogen can flow into the box body, thus ensuring the reasonable utilization of the heat in the nitrogen.

[0019] Optionally, a heat conduction block is arranged between the heat absorption tube and the preheating tube. There are multiple heat conduction blocks, which are arranged at intervals along the extension direction of the heat absorption tube. Both sides of the heat conduction block are in contact with the heat absorption tube and the preheating tube respectively.

[0020] By adopting the above technical solution, the nitrogen in the preheating pipe can not only be preheated and heated up in the internal environment of the box body, but also exchange heat with the high-temperature nitrogen in the heat absorption pipe, thereby enhancing the preheating effect on the nitrogen in the preheating pipe; thus, the temperature difference between the nitrogen in the preheating pipe and the inside of the box body can be reduced, thereby avoiding excessive temperature difference leading to additional energy consumption.

[0021] Optionally, a baffle is fixedly connected to the inner wall of the preheating pipe. A plurality of the baffles are provided and arranged at intervals along the extending direction of the preheating pipe, and adjacent two baffles are arranged in a staggered manner.

[0022] By adopting the above technical solution, the baffle can block the nitrogen flowing in the preheating pipe, thereby extending the flow path of the nitrogen, enabling the nitrogen in the preheating pipe to be heated more fully, and thus enhancing the preheating effect on the nitrogen.

[0023] Optionally, a heat conducting sheet is fixedly connected to the baffle. Both the baffle and the heat conducting sheet are copper sheets, and the heat conducting sheet penetrates out of the preheating pipe.

[0024] By adopting the above technical solution, the heat conducting sheet can transfer heat to the baffle, thereby further enhancing the preheating effect on the nitrogen in the preheating pipe.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the process of preheating and curing inside the box body, the nitrogen stored in the heat absorption pipe can absorb the heat in the box body and thus increase in temperature. Subsequently, during the process of opening the feed port for loading and unloading workpieces, the hot nitrogen stored in the heat absorption pipe can be discharged into the box body, thereby reasonably utilizing the heat stored in the nitrogen, avoiding the rapid loss of heat in the box body caused by the opening of the feed port, reducing the consumption during the subsequent heating process of the heating component, and helping to reduce energy consumption.

[0026] 2. The lifting component can drive the box body and the ejector rod to slide in the vertical direction, and the sliding ejector rod can jack up the workpiece, thus facilitating the smooth progress of the workpiece loading and unloading process.

[0027] 3. The preheating pipe is arranged in the box body, and the nitrogen in the nitrogen tank can be discharged through the preheating pipe and the exhaust pipe, thereby accelerating the gas flow inside the box body, enabling the heat distribution inside the box body to be more uniform, and thus enabling the temperature distribution inside the box body to quickly reach the required state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application; Figure 2 is the sectional view of Embodiment 1 of the present application; Figure 3 is Figure 2 the enlarged schematic view of part A in Figure 4 It is a schematic structural diagram of another perspective of Embodiment 1 of the present application; Figure 5 is Figure 4 an enlarged schematic diagram of part B in Figure 6 a schematic structural diagram of Embodiment 1 of the present application for showing the installation position of the heat absorption tube; Figure 7 is Figure 6 an enlarged schematic diagram of part C in Figure 8 a schematic structural diagram of Embodiment 1 of the present application for showing the exhaust holes; Figure 9 a schematic structural diagram of Embodiment 2 of the present application for showing the preheating tube; Figure 10 is a schematic structural diagram of another perspective of Embodiment 2 of the present application.

[0029] Reference numerals: 1, furnace body; 11, avoidance opening; 2, support plate; 21, first slide rail; 22, second slide rail; 3, box body; 31, feed inlet; 32, first slider; 4, heating assembly; 41, heating plate; 42, heat conducting plate; 5, shielding assembly; 51, power telescopic member; 52, door body; 6, heat storage assembly; 61, heat absorption tube; 62, exhaust pipe; 621, exhaust hole; 63, first valve; 7, lifting assembly; 71, linear driving member; 711, motor; 712, screw rod; 713, mounting plate; 7131, second slider; 714, mounting block; 72, push block; 721, inclined surface; 73, roller; 74, ejector rod; 8, preheating tube; 9, second valve; 10, first one-way valve; 12, second one-way valve; 13, heat conducting block; 14, heat conducting sheet; 15, avoidance hole; 16, workpiece. Detailed Description of the Embodiment

[0030] The following is a further detailed description of the present application in conjunction with Figures 1 - 10 to further illustrate the present application in detail.

[0031] Embodiment 1 Embodiment 1 of the present application discloses a pre-curing furnace. Refer to Figure 1 and Figure 2, the pre-curing furnace includes a furnace body 1 and a heating component 4, a shielding component 5, a lifting component 7, and a heat storage component 6 disposed in the furnace body 1. The height direction of the furnace body 1 is vertically arranged, and a horizontally arranged support plate 2 is fixedly connected in the furnace body 1; there are four support plates 2 and they are evenly spaced in the vertical direction. At the top of each support plate 2, two boxes 3 are provided, and a feeding port 31 for the workpiece 16 to enter and exit is provided on one side of the box 3. Correspondingly, eight avoidance ports 11 are opened on one side of the furnace body 1, and each avoidance port 11 corresponds to a feeding port 31, allowing the workpiece 16 to enter and exit the furnace body 1. The numbers of the heating component 4, the shielding component 5, the lifting component 7, and the heat storage component 6 are the same as the number of the boxes 3.

[0032] Referring to Figure 3 , the heating component 4 includes a heating plate 41 and a heat conducting plate 42. Both the heating plate 41 and the heat conducting plate 42 are located in the box 3, and both the heating plate 41 and the heat conducting plate 42 are horizontally arranged. The heating plate 41 is fixedly connected to the support plate 2, and the heating plate 41 and the support plate 2 are spaced apart; heating wires are embedded in the heating plate 41, so that the heating wires can quickly heat up after being energized to play a heating role. The heat conducting plate 42 is fixedly connected to the top wall of the heating plate 41, the bottom wall of the heat conducting plate 42 is in contact with the top wall of the heating plate 41, and the top wall of the heat conducting plate 42 is used to place the workpiece 16. The heat conducting plate 42 has strong heat conductivity, so that the heat distribution can be made more uniform, which helps to ensure the heating effect on the workpiece 16, thereby enhancing the pre-curing treatment effect.

[0033] Referring to Figure 4 and Figure 5 , the shielding component 5 includes a door body 52 and a power telescopic member 51. The door body 52 is hinged to the side wall at the feeding port 31 of the box 3, and the hinge axis of the door body 52 is horizontally arranged. The power telescopic member 51 is a cylinder. In other embodiments, the power telescopic member 51 can also be an oil cylinder or an electric push rod. The cylinder body of the power telescopic member 51 is hinged to the outer wall of the box 3, the end of the piston rod of the power telescopic member 51 is hinged to the door body 52, and the hinge axis between the power telescopic member 51 and the door body 52 is spaced and parallel to the hinge axis between the door body 52 and the box 3. Therefore, when the piston rod of the power telescopic member 51 extends, the door body 52 can be rotated outward, and the feeding port 31 of the box 3 is opened, facilitating the loading and unloading of the workpiece 16; when the piston rod of the power telescopic member 51 retracts, the door body 52 can be rotated inward, and the door body 52 blocks the feeding port 31 of the box 3, and the feeding port 31 of the box 3 is closed, making the inside of the box 3 in a sealed state, which can reduce the heat dissipated from the box 3 and helps to ensure the pre-curing treatment effect.

[0034] Referring to Figure 5, in order to facilitate the loading and unloading of the workpiece 16, a first slider 32 is fixedly connected to the bottom wall of the box body 3, and a vertical first slide rail 21 is fixedly connected to the top wall of the support plate 2. The first slider 32 is vertically slidably connected to the first slide rail 21, so that the box body 3 is slidably arranged on the support plate 2 in the vertical direction. A lifting assembly 7 is arranged on the support plate 2 and is used to drive the box body 3 to slide in the vertical direction.

[0035] Referring to Figure 3 and Figure 5 , the lifting assembly 7 includes a linear drive member 71, a push block 72, a roller 73 and a push rod 74. The linear drive member 71 includes a motor 711, a screw rod 712, a mounting plate 713 and a mounting block 714. The motor 711 is fixedly connected to the top wall of the support plate 2, and the axis of the output shaft of the motor 711 is horizontally arranged; the screw rod 712 is coaxially fixedly connected to the end of the output shaft of the motor 711. A horizontal second slide rail 22 is fixedly connected to the top wall of the support plate 2, and the second slide rail 22 is arranged in parallel with the screw rod 712; a second slider 7131 is fixedly connected to the bottom wall of the mounting plate 713, and the second slider 7131 is slidably arranged on the second slide rail 22, so that the mounting plate 713 is horizontally slidably arranged. The mounting block 714 is fixedly connected to the bottom wall of the mounting plate 713, and a threaded hole is formed in the mounting block 714, and the threaded hole is threadedly connected to the screw rod 712. Therefore, after the motor 711 is started, the screw rod 712 can be driven to rotate, so that the mounting block 714 and the mounting plate 713 slide horizontally. In other embodiments, the linear drive member 71 can also be arranged as a cylinder or an electric push rod.

[0036] The push block 72 is fixedly connected to the top wall of the mounting plate 713, and there are two push blocks 72 which are respectively located at both ends of the mounting plate 713. An inclined surface 721 is arranged on the top of the push block 72. The roller 73 is rotatably connected to the bottom wall of the box body 3; there are two rollers 73 which are respectively located on both sides of the box body 3. The two rollers 73 respectively correspond to the inclined surfaces 721 on the two push blocks 72. Therefore, after the motor 711 is started, the mounting plate 713 can be driven to slide horizontally, the mounting plate 713 drives the push block 72 to slide, so that the inclined surface 721 on the push block 72 abuts against the roller 73. As the push block 72 slides, the roller 73 can slide upward while rotating, so that the box body 3 slides upward. Therefore, the horizontal slide can be converted into a vertical slide, which saves more space.

[0037] Referring to Figure 3, the ejector rod 74 is located in the box body 3. The ejector rod 74 is fixedly connected to the bottom wall of the box body 3 and is arranged vertically. There are four ejector rods 74 and they are arranged in a circumferential array. Avoidance holes 15 for the ejector rod 74 to pass through are provided on both the heating plate 41 and the heat conducting plate 42. Therefore, when the box body 3 slides upward, it can drive the ejector rod 74 to slide upward, so that the top end of the ejector rod 74 passes through the avoidance hole 15. Subsequently, the bottom wall of the workpiece 16 can be supported by the top end of the ejector rod 74. Then the box body 3 slides downward, so that the ejector rod 74 moves downward, driving the workpiece 16 to move downward, and the workpiece 16 is placed on the top wall of the heat conducting plate 42, completing the feeding process of the workpiece 16.

[0038] During feeding, a feeding device can be used to complete the feeding process. The feeding device includes a robotic arm and a support rod arranged at the movable end of the robotic arm. There are two support rods and they are arranged in parallel at intervals. The top surface of the support rod is used to support the workpiece 16. The top surface of the workpiece 16 is sprayed with paint. Therefore, supporting the bottom wall of the workpiece 16 by the support rod is not likely to damage the paint on the top of the workpiece 16. The robotic arm includes a horizontal linear motor and a vertical linear motor, so that the support rod can slide in the horizontal and vertical directions. During the feeding process, the workpiece 16 can be first placed on the top surfaces of the two support rods, and then the door body 52 is opened. The robotic arm drives the support rod to slide horizontally, so that the workpiece 16 on the top surface of the support rod slides into the interior of the box body 3 through the avoidance opening 11 and the feeding port 31, and the workpiece 16 is located directly above the ejector rod 74. Then the robotic arm drives the workpiece 16 to move downward a short distance, so that the bottom wall of the workpiece 16 abuts against the top wall of the ejector rod 74, and the workpiece 16 is supported by the ejector rod 74. Then the robotic arm drives the support rod to slide out, and the ejector rod 74 moves downward until the bottom wall of the workpiece 16 fits against the top wall of the heat conducting plate 42, and the feeding process of the workpiece 16 can be completed.

[0039] Since both the heat conducting plate 42 and the heating plate 41 are fixedly arranged on the support plate 2, and the box body 3 and the ejector rod 74 can slide in the vertical direction, after the box body 3 and the ejector rod 74 slide upward and the top end of the ejector rod 74 passes through the heat conducting plate 42, the gap between the top end of the ejector rod 74 and the top wall of the heat conducting plate 42 can provide space for the sliding-in of the support rod, which helps the smooth progress of the loading and unloading process.

[0040] Refer to Figure 6 、 Figure 7 and Figure 8, the heat storage component 6 includes a nitrogen tank, a heat absorption pipe 61, an exhaust pipe 62 and a first valve 63. The nitrogen tank is fixedly connected to the furnace body 1 and is used to provide nitrogen. The heat absorption pipe 61 is made of copper, so it has strong heat conduction ability; the heat absorption pipe 61 is located inside the box body 3 and is fixedly connected to the bottom wall of the box body 3, and one end of the heat absorption pipe 61 is communicated with the nitrogen tank. The other end of the heat absorption pipe 61 is communicated with the exhaust pipe 62, and the exhaust pipe 62 is located inside the box body 3 and is fixedly connected to the inner wall of the box body 3. An exhaust hole 621 is formed in the exhaust pipe 62, and a plurality of exhaust holes 621 are provided and are evenly spaced along the length direction of the exhaust pipe 62. Therefore, the nitrogen in the heat absorption pipe 61 can be discharged into the box body 3 through the exhaust holes 621 on the exhaust pipe 62. The first valve 63 is fixedly connected between the heat absorption pipe 61 and the exhaust pipe 62, and the first valve 63 is an electromagnetic valve and can control the on-off of the pipeline.

[0041] Therefore, after the main valve on the nitrogen tank is opened, the nitrogen in the nitrogen tank can flow into the heat absorption pipe 61 after being decompressed by the pressure reducing valve. Since the first valve 63 is closed, the nitrogen stays in the heat absorption pipe 61. When the heating component 4 in the box body 3 heats the workpiece 16, the temperature in the box body 3 rises. Therefore, the nitrogen in the heat absorption pipe 61 can absorb heat and the temperature rises. When the pre-curing treatment is completed and the door body 52 is opened and the workpiece 16 is taken out, the first valve 63 is opened. At this time, the heated nitrogen in the heat absorption pipe 61 can be discharged into the box body 3, so as to supplement heat to the box body 3 and weaken the influence caused by the rapid heat loss inside the box body 3 due to the opening of the door body 52.

[0042] Among them, two heat absorption pipes 61 are provided, which are respectively fixedly connected to both ends of the exhaust pipe 62; a first valve 63 is provided at each end of the exhaust pipe 62. Therefore, nitrogen can be stored in each heat absorption pipe 61, so as to store more heat and further reduce energy consumption. The heat absorption pipe 61 is arranged in a bent shape, so that the storage capacity of nitrogen can be further increased.

[0043] The implementation principle of Embodiment 1 is as follows: The piston rod of the power telescopic member 51 extends, causing the door body 52 to rotate outward, thereby opening the feed port 31. Then the motor 711 is started, driving the screw rod 712 to rotate, driving the mounting plate 713 to slide, the mounting plate 713 drives the push block 72 to slide, and the inclined surface 721 of the push block 72 abuts against the roller 73. Therefore, the horizontal sliding of the push block 72 can be converted into the vertical sliding of the roller 73. When the roller 73 slides vertically, it drives the box body 3 to move upward. The box body 3 drives the ejector rod 74 to move upward, so that the top end of the ejector rod 74 passes through the avoidance hole 15 in the heating plate 41 and the heat conducting plate 42. Then the feeding device horizontally moves the workpiece 16, so that the workpiece 16 enters the inside of the box body 3 through the avoidance port 11 and the feed port 31; the feeding device then drives the workpiece 16 to move downward, so that the bottom wall of the workpiece 16 abuts against the top wall of the ejector rod 74, thereby supporting the workpiece 16 through the ejector rod 74; the feeding device then moves outwards. Then the output shaft of the motor 711 rotates in the reverse direction, causing the box body 3 to drive the ejector rod 74 to move downward, so that the workpiece 16 moves downward until the workpiece 16 lands on the top wall of the heat conducting plate 42, completing the feeding process.

[0044] The power telescopic member 51 then drives the door body 52 to rotate inward to close the feed port 31. The heating plate 41 heats up, and the heat is more evenly transferred to the workpiece 16 through the heat conducting plate 42, thereby pre-curing the coating on the top surface of the workpiece 16. In the initial state, the main valve of the nitrogen tank is open and the first valve 63 is closed, so nitrogen is stored in the heat absorption tube 61; during the pre-curing process, the temperature inside the box body 3 rises, so the nitrogen in the heat absorption tube 61 located inside the box body 3 can absorb heat and thus heat up, storing a part of the heat. When the pre-curing process is completed and the workpiece 16 needs to be taken out, the door body 52 is opened at this time, and the first valve 63 is opened. While taking out the workpiece 16, the heated nitrogen in the heat absorption tube 61 can flow into the exhaust pipe 62, and then is discharged into the box body 3 through the exhaust holes 621 on the exhaust pipe 62, so as to make full use of the heat stored in the nitrogen and supplement heat to the box body 3, avoiding the rapid loss of heat in the box body 3 caused by opening the door body 52 during the material taking process, thereby reducing energy consumption.

[0045] Embodiment 2 Refer to Figure 9 and Figure 10, the difference between this embodiment and Embodiment 1 is that in this embodiment, a preheating pipe 8 is fixedly connected to one side of the heat absorption pipe 61 in the box body 3. The preheating pipe 8 is a copper pipe, so it has strong heat conduction ability. There are two preheating pipes 8, which correspond to the two heat absorption pipes 61 respectively. The preheating pipe 8 is arranged along the extension direction of the heat absorption pipe 61. One end of the preheating pipe 8 is connected to the nitrogen tank, and the other end of the preheating pipe 8 is connected to the exhaust pipe 62. A second valve 9 is connected between the preheating pipe 8 and the nitrogen tank. The second valve 9 is an electromagnetic valve, which is used to control the opening and closing of the pipeline. Therefore, when the door body 52 closes the feeding port 31, the inside of the box body 3 is in a pre-curing treatment state. At this time, the first valve 63 is closed, and nitrogen is stored in the heat absorption pipe 61. The second valve 9 is opened, and the nitrogen in the nitrogen tank can flow into the exhaust pipe 62 through the preheating pipe 8, so as to accelerate the gas flow inside the box body 3, make the inside of the box body 3 heat up more quickly, and the temperature distribution is more uniform. When the door body 52 rotates to the side away from the feeding port 31, so that the feeding port 31 is opened, the first valve 63 is opened, the second valve 9 is closed, and the heated nitrogen in the heat absorption pipe 61 can be discharged through the exhaust pipe 62.

[0046] Further, a first one-way valve 10 is fixedly connected to one end of the heat absorption pipe 61 close to the nitrogen tank, so that nitrogen can only flow from the nitrogen tank into the heat absorption pipe 61 and cannot flow reversely, thus avoiding the nitrogen in the heat absorption pipe 61 flowing into the preheating pipe 8 when the first valve 63 is closed, which affects the storage amount of nitrogen and the storage effect of heat energy. A second one-way valve 12 is fixedly connected to one end of the preheating pipe 8 close to the exhaust pipe 62, so that nitrogen can only flow from the preheating pipe 8 into the exhaust pipe 62 and cannot flow reversely, thus avoiding the nitrogen in the heat absorption pipe 61 flowing into the preheating pipe 8 when the first valve 63 is opened, which affects the process of supplementing heat to the box body 3 by nitrogen discharge.

[0047] Since the preheating pipe 8 is arranged in the box body 3 and the temperature in the box body 3 is relatively high, the nitrogen in the preheating pipe 8 is preheated and heated before being discharged from the exhaust pipe 62. Therefore, the temperature difference between the discharged nitrogen and the inside of the box body 3 can be avoided from being too large, which affects the heating effect.

[0048] Further, a heat conduction block 13 is arranged between the heat absorption pipe 61 and the preheating pipe 8. There are multiple heat conduction blocks 13, which are evenly spaced along the extension direction of the heat absorption pipe 61. The heat conduction block 13 is fixedly connected to the bottom wall of the box body 3, and both sides of the heat conduction block 13 are in contact with the outer walls of the heat absorption pipe 61 and the preheating pipe 8 respectively. The heat conduction block 13 is a copper block with good heat conduction effect, so it can better transfer the heat in the nitrogen in the heat absorption pipe 61 to the nitrogen in the preheating pipe 8, thereby further improving the preheating effect of the nitrogen in the preheating pipe 8.

[0049] In addition, a baffle is fixedly connected to the inner wall of the preheating pipe 8. A plurality of baffles are provided and are evenly spaced along the extending direction of the preheating pipe 8; adjacent two baffles are arranged staggeredly. Therefore, the arrangement of the baffles can extend the flow path of nitrogen in the preheating pipe 8, enabling the nitrogen to be heated more fully.

[0050] A heat conducting sheet 14 is fixedly connected to the baffle. The heat conducting sheet 14 penetrates out of the side wall of the preheating pipe 8 and is fixedly connected to the outer wall of the preheating pipe 8. Both the baffle and the heat conducting sheet 14 are copper sheets, and they have good heat conduction effect. Therefore, they can further enhance the preheating effect on the nitrogen in the preheating pipe 8.

[0051] The implementation principle of Embodiment 2 is as follows: When the feed inlet 31 is closed, the inside of the box body 3 is in a state of pre-curing treatment. At this time, the first valve 63 is closed, and the nitrogen in the nitrogen tank flows into the heat absorption pipe 61 and is stored therein. The nitrogen in the heat absorption pipe 61 can absorb heat and thus increase in temperature; the second valve 9 is opened, and the nitrogen in the nitrogen tank can be preheated through the preheating pipe 8 and then discharged from the exhaust holes 621 on the exhaust pipe 62, thereby accelerating the gas flow inside the box body 3, making the temperature distribution more uniform, and enabling the box body 3 to reach the required state more quickly.

[0052] When the feed inlet 31 is opened, the workpiece 16 is loaded and unloaded. At this time, the first valve 63 is opened and the second valve 9 is closed. The heated nitrogen stored in the heat absorption pipe 61 is discharged into the box body 3 through the exhaust holes 621 of the exhaust pipe 62, thereby supplementing heat to the box body 3 and reasonably utilizing the stored heat energy.

[0053] The above are the optional embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pre-curing furnace, characterized in that: include: A furnace body (1), wherein a plurality of support plates (2) are arranged in the furnace body (1), a plurality of boxes (3) are arranged on the support plates (2), and a feed port (31) for the workpiece (16) to enter and exit is arranged on one side of the box (3); A heating component (4) is arranged on the support plate (2), the heating component (4) is located inside the box (3), and is used to heat a workpiece (16) placed in the box (3); A shielding component (5) is arranged on the box body (3) and is used to control the opening and closing of the feed port (31); A heat storage component (6) comprises a nitrogen tank, a heat absorption tube (61), an exhaust pipe (62) and a first valve (63), wherein the nitrogen tank is arranged on the furnace body (1), the nitrogen tank is connected to the heat absorption tube (61), the heat absorption tube (61) and the exhaust pipe (62) are both fixedly arranged in the box body (3), the heat absorption tube (61) is connected to the exhaust pipe (62), the first valve (63) is connected between the heat absorption tube (61) and the exhaust pipe (62), and the exhaust pipe (62) is provided with a plurality of exhaust holes (621) spaced apart along its length direction, so that after the first valve (63) is opened, the heated nitrogen stored in the heat absorption tube (61) can be discharged into the box body (3) through the exhaust holes (621) on the exhaust pipe (62).

2. A pre-curing furnace according to claim 1, characterized in that: The shielding assembly (5) comprises a door body (52) and a power telescopic member (51); the door body (52) is rotatably connected to the feed inlet (31) of the box body (3); the door body (52) is used to block the feed inlet (31); the power telescopic member (51) is arranged between the box body (3) and the door body (52); one end of the power telescopic member (51) is rotatably connected to the outer wall of the box body (3); and the other end of the power telescopic member (51) is rotatably connected to the door body (52).

3. A pre-curing furnace according to claim 1, characterized in that: The heating assembly (4) comprises a heating plate (41) and a heat conducting plate (42) located inside the box body (3); the heating plate (41) is fixedly connected to the support plate (2); the heat conducting plate (42) is fixedly connected to the top wall of the heating plate (41); and the top wall of the heat conducting plate (42) is used to place a workpiece (16).

4. A pre-curing furnace according to claim 3, characterized in that: The box body (3) is vertically slidably arranged on the support plate (2); a lifting assembly (7) is arranged on the support plate (2); the lifting assembly (7) comprises a linear drive member (71), a push block (72), a roller (73) and a push rod (74); the linear drive member (71) is fixedly connected to the support plate (2); the sliding direction of the movable end of the linear drive member (71) is horizontally arranged; the push block (72) is fixedly connected to the movable end of the linear drive member (71); the push block (72) is An inclined surface (721) is provided, the roller (73) is rotatably connected to the box body (3), the inclined surface (721) is used to abut against the roller (73), so that when the push block (72) slides horizontally, it can push the roller (73) to slide vertically, the push rod (74) is located in the box body (3) and fixedly connected to the bottom wall of the box body (3), the top end of the push rod (74) passes through the heating plate (41) and the heat conducting plate (42), and the top end of the push rod (74) is used to abut against the bottom wall of the workpiece (16).

5. A pre-curing oven according to claim 1, characterized in that: The heat absorbing tube (61) is arranged in a curved shape.

6. A pre-curing oven according to claim 1, characterized in that: A preheating tube (8) is fixedly connected to one side of the heat absorption tube (61) in the box body (3); one end of the preheating tube (8) is connected to a nitrogen tank, and the other end of the preheating tube (8) is connected to an exhaust pipe (62); a second valve (9) is provided between the preheating tube (8) and the nitrogen tank.

7. A pre-curing oven according to claim 6, characterized in that: A first one-way valve (10) is provided at one end of the heat absorption tube (61) close to the nitrogen tank, and a second one-way valve (12) is provided at one end of the preheating tube (8) close to the exhaust pipe (62).

8. A pre-curing oven according to claim 6, characterized in that: A heat conducting block (13) is provided between the heat absorbing tube (61) and the preheating tube (8); a plurality of the heat conducting blocks (13) are provided and are arranged at intervals along the extension direction of the heat absorbing tube (61); two sides of the heat conducting block (13) are respectively against the heat absorbing tube (61) and the preheating tube (8).

9. A pre-curing furnace according to claim 6, characterized in that: A baffle is fixedly connected to the inner wall of the preheating tube (8), a plurality of baffles are provided and arranged at intervals along the extension direction of the preheating tube (8), and two adjacent baffles are arranged in a staggered manner.

10. A pre-curing oven according to claim 9, characterized in that: A heat conducting sheet (14) is fixedly connected to the baffle, the baffle and the heat conducting sheet (14) are both copper sheets, and the heat conducting sheet (14) passes through the preheating tube (8).

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