Cooling structure in conveyor oven

Abstract

The utility model relates to a cooling structure in a conveyor oven, which comprises an oven, a layered heat insulation plate is arranged at the middle upper part in the oven, and the layered heat insulation plate divides the space in the oven into a low-temperature chamber positioned at the upper layer and a high-temperature chamber positioned at the lower layer; the surface of the layered heat insulation plate is at least provided with a narrow long groove penetrating through the high-temperature cavity and the low-temperature cavity. The conveying device is arranged in the low-temperature cavity and comprises a connecting buckle which is located over the narrow and long groove and can move in the length direction of the narrow and long groove; the fan is arranged outside the oven; the air supply pipe communicates with an air outlet of the fan and communicates into the low-temperature cavity, and an exhaust channel with the air outlet direction facing the conveying device is arranged on the surface of the air supply pipe; the conveying device is protected while the process temperature is met, and faults caused by high temperature are avoided; precise temperature control of the conveying mechanism is achieved on the premise that the process temperature is kept stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oven device, concretely relates to a conveyor oven inner cooling structure. BACKGROUND

[0002] When the internal temperature of the paint curing process oven exceeds 250 DEG C, the metal parts of the conveyor in the oven will expand and contract with heat, resulting in a decrease in fitting precision, increased wear and tear, accelerated component aging, and possibly softened and deformed conveyor belts, reduced strength and service life, and further mechanical failure. The prior art attempts to reduce the internal temperature of the oven by overall strengthening of the cooling system, but this results in excessive temperature fluctuations in the curing zone, causing defects such as orange peel and sagging in the coating, and an increase in the defect rate. How to achieve precise temperature control of the conveying mechanism while maintaining stable process temperature has become a technical bottleneck restricting industry development. SUMMARY

[0003] I. Technical problems to be solved

[0004] The utility model discloses a conveyor oven inner cooling structure, which achieves precise temperature control of the conveying mechanism while maintaining stable process temperature.

[0005] II. Technical scheme

[0006] The utility model discloses a conveyor oven inner cooling structure, which achieves precise temperature control of the conveying mechanism while maintaining stable process temperature.

[0007] The utility model discloses a conveyor oven inner cooling structure, which achieves precise temperature control of the conveying mechanism while maintaining stable process temperature.

[0008] The oven is provided with a layered heat insulation plate in the upper part, which divides the space in the oven into a low-temperature chamber in the upper layer and a high-temperature chamber below; the surface of the layered heat insulation plate is provided with at least one narrow and long slot that communicates the high-temperature chamber and the low-temperature chamber;

[0009] The conveying device arranged in the low-temperature chamber comprises a connecting buckle located directly above the narrow and long slot and capable of moving along the length direction of the narrow and long slot, and the connecting buckle is used to connect a lifting chain that can extend into the high-temperature chamber through the narrow and long slot to lift and convey materials;

[0010] The fan arranged outside the oven;

[0011] The air supply pipe connected to the air outlet of the fan is connected to the low-temperature chamber and provided with an air outlet channel on the surface with the air outlet direction facing the conveying device.

[0012] Further, the opposite sides of the narrow and long slot are fixed with symmetrically arranged heat-resistant lining strips.

[0013] Furthermore, the lower ends of the two heat-resistant strips are located inside the high-temperature chamber, and their outer walls are inclined in a shape that is smaller at the bottom and larger at the top; the upper ends of the two heat-resistant strips are located inside the low-temperature chamber, and their inner walls are inclined in a shape that is smaller at the bottom and larger at the top.

[0014] Furthermore, the heat-resistant lining strip has an internal air guide channel, with the inlet and outlet sides of the air guide channel located on the outer and inner walls of the heat-resistant lining strip, respectively; the air supply pipe is connected to the air guide pipe, and an air hood is fixed to the end of the air guide pipe, with the opening of the air hood covering the outside of the inlet side of the air guide channel located on the outer wall of the heat-resistant lining strip.

[0015] Furthermore, the air guide channel is inclined with the inlet side higher and the outlet side lower, in order to form a downward, slightly turbulent airflow between the two heat-resistant lining strips.

[0016] Furthermore, the exhaust volume of the exhaust duct is much greater than that of the duct, and the exhaust duct is located above the duct.

[0017] Furthermore, the air supply pipe includes a main pipe and a branch pipe connected below the main pipe. The branch pipe is close to the conveying device and its axial direction is parallel to the length direction of the narrow trough.

[0018] Furthermore, an air filter is installed at the air inlet of the fan, and an air valve is installed on the air supply pipe.

[0019] Furthermore, symmetrical support members for installing heat-resistant lining strips are arranged on both sides of the narrow and long groove below the layered heat insulation board; the support members include a curved plate fixed below the layered heat insulation board and a support plate connected to the curved plate by bolts and nuts. The inner sidewalls of the curved plate and the support plate are tightly fitted with the outer sidewall of the heat-resistant lining strip, and the lower part of the support plate has a limiting edge formed by bending upwards. The limiting edge is tightly fitted with the inner wall of the heat-resistant lining strip to limit and fix the heat-resistant lining strip.

[0020] III. Beneficial Effects

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] 1. This utility model separates the upper and lower spaces inside the oven by using layered heat insulation plates. It maintains a coating curing temperature of over 300°C in the high-temperature chamber and a stable operating temperature of the conveying device of below 250°C in the low-temperature chamber. While meeting the process temperature, it protects the conveying device and avoids failure caused by high temperature. It achieves precise temperature control of the conveying mechanism while maintaining a stable process temperature.

[0023] 2. The heat-resistant lining strip improves the heat resistance of the narrow and long groove. When the heat-resistant lining strip fails, the failed heat-resistant lining strip is pulled out from above and a new heat-resistant lining strip is inserted so that its inner and outer walls are adhered and fixed by the bending plate and the support plate.

[0024] 3. The exhaust duct directly sprays air into the conveying device to cool it down. The air guide pipe guides the airflow into the air guide duct and then prevents the high-temperature gas from flowing upward, thereby reducing the impact on the conveying device. Through the efficient heat dissipation of the exhaust duct and the precise airflow control of the air guide pipe, the conveying device is doubly guaranteed to be at a stable operating temperature. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0027] 1. Oven; 11. Low-temperature chamber; 12. High-temperature chamber; 2. Layered heat insulation board; 21. Narrow long slot; 3. Conveying device; 31. Connecting buckle; 4. Fan; 5. Air supply duct; 51. Main pipe; 52. Branch pipe; 53. Exhaust duct; 54. Air guide duct; 55. Air cover; 6. Heat-resistant lining strip; 61. Air guide duct; 7. Air filter; 8. Air valve; 9. Support piece; 91. Bend plate; 92. Support plate; 921. Limiting edge. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Example 1:

[0030] A cooling structure inside a conveyor oven 1, please refer to [link / reference]. Figures 1-2 The oven includes an oven 1, and a layered heat insulation plate 2 is provided in the upper middle part of the oven 1. The layered heat insulation plate 2 divides the space inside the oven 1 into a low-temperature chamber 11 located in the upper layer and a high-temperature chamber 12 located in the lower layer. The high-temperature chamber 12 maintains a coating curing temperature of above 300°C, and the low-temperature chamber 11 maintains a temperature of below 250°C. At least one narrow and long groove 21 is formed on the surface of the layered heat insulation plate 2, which runs through and connects the high-temperature chamber 12 and the low-temperature chamber 11.

[0031] A conveying device 3 is installed inside the low-temperature chamber 11. The conveying device 3 includes a connecting buckle 31 located directly above the narrow and long groove 21. The conveying device 3 uses a chain and sprocket drive mechanism, a suspended drag chain drive mechanism, or a pneumatic push rod and synchronous belt drive mechanism to drive the connecting buckle 31 to move along the length of the narrow and long groove 21. The connecting buckle 31 is connected to a hanging chain, which passes through the narrow and long groove 21 and extends to the high-temperature chamber 12. The conveyed object (cage or directly hoisted workpiece to be coated and cured) is hoisted below the hanging chain.

[0032] A fan 4 is installed outside the oven 1. The air outlet of the fan 4 is connected to an air supply pipe 5, which leads to the low-temperature chamber 11 and has an exhaust channel 53 on its surface with the air outlet direction facing the conveying device 3. The fan 4 delivers room temperature air from the workshop into the low-temperature chamber 11 located at the top of the oven 1, keeping the temperature of the upper part of the oven 1 below 250°C. This prevents the metal parts of the conveying device 3 from thermally expanding and contracting, which would lead to decreased fitting precision and accelerated wear.

[0033] An air filter 7 is installed at the air inlet of the blower 4, and an air valve 8 is installed on the air supply duct 5. The air filter 7 prevents external impurities from entering the oven 1 and affecting the coating curing. The air valve 8 is used to control the air volume, and it can be a solenoid valve to achieve frequency-adjustable air volume.

[0034] In addition, the air supply duct 5 includes a main duct 51 and a branch duct 52 connected to the bottom of the main duct 51. The branch duct 52 is close to the conveying device 3 and its axial direction is parallel to the length direction of the narrow and long trough 21. The exhaust channel 53 is set on the branch duct 52 to ensure that the exhaust channel 53 can deliver air to the conveying device 3 to reduce the temperature throughout the entire conveying process of the conveying device 3.

[0035] This invention uses a layered heat insulation plate 2 to separate the upper and lower spaces inside the oven 1. The coating curing temperature is maintained above 300°C in the high-temperature chamber 12, and the conveying device 3 is kept at a stable operating temperature below 250°C in the low-temperature chamber 11. This design protects the conveying device 3 and prevents malfunctions caused by high temperatures while meeting the process temperature requirements.

[0036] Example 2:

[0037] The difference from Embodiment 1 is that symmetrically arranged heat-resistant lining strips 6 are fixed on opposite sides within the narrow and elongated groove 21, and the lifting chain passes between the heat-resistant lining strips; the heat-resistant lining strips 6 are made of refractory bricks or densely pressed aluminum silicate fibers, and have good fire resistance. Due to the rising characteristics of high-temperature gas, a high-temperature zone is easily formed in the narrow and elongated groove 21, causing the narrow and elongated groove 21 to deform or crack due to thermal expansion; the heat-resistant lining strips 6 improve the heat resistance of the narrow and elongated groove 21.

[0038] The heat-resistant lining strip 6 is replaceable. Specifically, symmetrical support members 9 for installing the heat-resistant lining strip 6 are arranged on both sides of the narrow and long groove 21 below the layered heat insulation plate 2. The support member 9 includes a bent plate 91 fixed below the layered heat insulation plate 2 and a support plate 92 connected to the bent plate 91 by bolts and nuts. The inner sidewalls of the bent plate 91 and the support plate 92 are tightly fitted with the outer sidewall of the heat-resistant lining strip 6, and the support plate 92 has an upwardly bent limiting edge 921 at the bottom. The limiting edge 921 is tightly fitted with the inner wall of the heat-resistant lining strip 6 to limit and fix the heat-resistant lining strip 6. When the heat-resistant lining strip 6 fails, the failed heat-resistant lining strip 6 is pulled out from above, and a new heat-resistant lining strip 6 is inserted so that its inner and outer walls are fitted and fixed by the bent plate 91 and the support plate 92.

[0039] Furthermore, the lower ends of the two heat-resistant lining strips 6 are located inside the high-temperature chamber 12, and their outer walls are inclined with a smaller bottom and a larger top; the upper ends of the two heat-resistant lining strips 6 are located inside the low-temperature chamber 11, and their inner walls are inclined with a smaller bottom and a larger top. When the high-temperature gas encounters the inclined outer walls of the lower ends of the heat-resistant lining strips 6, the airflow is guided to both sides of the refractory lining strips, reducing the amount of high-temperature gas entering between the two refractory lining strips; when the high-temperature gas reaches the upper opening of the two refractory lining strips, due to the setting of the inclined inner walls of the upper ends of the heat-resistant lining strips 6, the outlet is widened, the airflow dissipates, and the impact of the high-temperature airflow on the conveying device 3 directly above is reduced.

[0040] Example 3:

[0041] Based on Embodiment 2, the difference in this embodiment is that an air guide channel 61 is provided inside the heat-resistant lining strip 6, with the inlet and outlet sides of the air guide channel 61 located on the outer and inner wall surfaces of the heat-resistant lining strip 6, respectively; an air guide pipe 54 is connected to the air supply pipe 5, and an air hood 55 is fixed to the end of the air guide pipe 54, with the opening of the air hood 55 covering the outside of the inlet side of the air guide channel 61 located on the outer wall surface of the heat-resistant lining strip 6. The air guide channel 61 is inclined with the inlet side higher and the outlet side lower, in order to form a downward, slightly turbulent airflow between the two heat-resistant lining strips 6.

[0042] When the fan 4 is running, some gas flows into the air guide channel 61 through the air guide pipe 54 and the air cover 55. Since the air guide channel 61 is set to be inclined downward, the airflow is sprayed downward between the two heat-resistant lining strips 6, which hinders the upward flow of high-temperature gas and reduces the impact on the upper conveying device 3.

[0043] Both the exhaust duct 53 and the air guide pipe 54 are installed on the branch pipe 52. The exhaust volume of the exhaust duct 53 is much greater than that of the air guide pipe 54. The exhaust duct 53 is located above the air guide pipe 54. The exhaust duct 53 directly sprays air to cool the conveying device 3. The air guide pipe 54 guides the airflow into the air guide duct 61 and then prevents the high-temperature gas from flowing upward, thereby reducing the impact on the conveying device 3. Through the efficient heat dissipation of the exhaust duct 53 and the precise airflow control of the air guide pipe 54, the conveying device 3 is kept at a stable operating temperature.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A cooling structure for a conveyor oven, characterized in that, include: An oven, wherein a layered heat insulation plate is provided in the upper middle part of the oven, the layered heat insulation plate dividing the space inside the oven into a low-temperature chamber in the upper layer and a high-temperature chamber in the lower layer; at least one narrow and long groove is formed on the surface of the layered heat insulation plate, which runs through and connects the high-temperature chamber and the low-temperature chamber; A conveying device installed in a low-temperature chamber includes a connecting buckle located directly above a narrow, elongated trough and movable along the length of the trough. The connecting buckle is used to connect a lifting chain that can pass through the narrow, elongated trough and extend into the high-temperature chamber to hoist and transport objects. Fans installed outside the oven; An air supply pipe is connected to the air outlet of the fan, the air supply pipe is connected to the low temperature chamber, and the surface is provided with an exhaust channel with the air outlet direction facing the conveying device.

2. The cooling structure inside a conveyor oven according to claim 1, characterized in that, Symmetrically arranged heat-resistant strips are fixed on opposite sides of the narrow, elongated groove.

3. The cooling structure inside a conveyor oven according to claim 2, characterized in that, The lower ends of the two heat-resistant strips are located inside the high-temperature chamber, and their outer walls are inclined with a smaller lower end and a larger upper end; the upper ends of the two heat-resistant strips are located inside the low-temperature chamber, and their inner walls are inclined with a smaller lower end and a larger upper end.

4. The cooling structure inside a conveyor oven according to claim 2, characterized in that, The heat-resistant lining strip has an internal air guide channel, with the inlet and outlet sides of the air guide channel located on the outer and inner walls of the heat-resistant lining strip, respectively. The air supply pipe is connected to the air guide pipe, and a wind hood is fixed to the end of the air guide pipe. The opening of the wind hood covers the outside of the inlet side of the air guide channel located on the outer wall of the heat-resistant lining strip.

5. The cooling structure inside a conveyor oven according to claim 4, characterized in that, The air guide channel is inclined with the inlet side higher and the outlet side lower, in order to form a downward, slightly turbulent airflow between the two heat-resistant lining strips.

6. A cooling structure inside a conveyor oven according to claim 4 or 5, characterized in that, The exhaust volume of the exhaust duct is much greater than that of the duct, and the exhaust duct is located above the duct.

7. The cooling structure inside a conveyor oven according to claim 1, characterized in that, The air supply pipe includes a main pipe and a branch pipe connected below the main pipe. The branch pipe is close to the conveying device and its axial direction is parallel to the length direction of the narrow trough.

8. A cooling structure inside a conveyor oven according to claim 1 or 7, characterized in that, An air filter is installed at the air inlet of the fan, and an air valve is installed on the air supply pipe.

9. The cooling structure inside a conveyor oven according to claim 2, characterized in that, The layered heat insulation board is provided with symmetrical support members on both sides of the narrow and long groove below it for installing heat-resistant lining strips. The support members include a curved plate fixed below the layered heat insulation board and a support plate connected to the curved plate by bolts and nuts. The inner sidewalls of the curved plate and the support plate are tightly fitted with the outer sidewall of the heat-resistant lining strip, and the support plate has an upwardly bent limiting edge at its bottom. The limiting edge is tightly fitted with the inner wall of the heat-resistant lining strip to limit and fix the heat-resistant lining strip.

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