Low-temperature tunnel furnace production line device

Abstract

The utility model discloses a low-temperature tunnel furnace production line device which is characterized in that a product inlet, a pre-cooling section, a low-temperature constant-temperature section, a rewarming section and a product outlet are sequentially communicated with one another to form a low-temperature tunnel furnace production line, a conveying belt is arranged in the low-temperature tunnel furnace production line in a penetrating manner, and a tunnel furnace working chamber is formed above the conveying belt; the pre-cooling section is used for pre-cooling the products conveyed to the current area by the conveying belt; the low-temperature constant-temperature section cools the products conveyed to the current area by the conveying belt to a preset temperature; the rewarming section restores the products conveyed to the current area by the conveying belt to the room temperature environment; circulating air ducts are arranged in the pre-cooling section, the low-temperature constant-temperature section and the rewarming section, so that all areas of the working cavity of the tunnel furnace keep uniform temperature. According to the technical scheme, the uniformity of the temperature in the working chamber of the tunnel furnace is improved, meanwhile, condensation of products is prevented, continuous production of the products can be achieved, the production efficiency is high, and the total energy consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of heat preservation devices, in particular to a low-temperature tunnel furnace production line device. Background Art

[0002] At present, industrial products that require low-temperature insulation processes are generally produced in low-temperature boxes or walk-in boxes, which have low production efficiency, occupy a large area, and are costly. In addition, the box has a limited volume and can only hold a certain number of products at a time, which makes it cumbersome to take out, inefficient, and requires a large area and high energy consumption. Utility Model Content

[0003] In view of the above problems, the utility model provides a low-temperature tunnel furnace production line device, which can pre-cool the product, cool it to a preset temperature and restore it to room temperature through the components of the device, thereby preventing the product from directly entering a low-temperature state or being directly exposed from a low-temperature state and causing product damage. The circulating air duct is used to improve the uniformity of the temperature in the working chamber of the tunnel furnace and prevent condensation of the product. The construction of the low-temperature tunnel furnace production line can realize continuous production of products with high production efficiency and low total energy consumption.

[0004] To achieve the above purpose, the utility model provides a low-temperature tunnel furnace production line device, including: a product inlet, a pre-cooling section, a low-temperature constant temperature section, a re-temperature section, a product outlet and a conveyor belt;

[0005] The product inlet, the pre-cooling section, the low-temperature constant temperature section, the re-temperature section and the product outlet are sequentially connected to each other to form a low-temperature tunnel furnace production line, and the conveyor belt is arranged through the low-temperature tunnel furnace production line, and a tunnel furnace working chamber is formed above the conveyor belt;

[0006] The pre-cooling section pre-cools the products transported by the conveyor belt to the current area;

[0007] The low temperature constant temperature section cools down the products transported to the current area by the conveyor belt to a preset temperature;

[0008] The rewarming section restores the products transported to the current area by the conveyor belt to room temperature;

[0009] Circulating air ducts are arranged in the pre-cooling section, the low-temperature constant temperature section and the re-temperature section, so that each area of ​​the working chamber of the tunnel furnace maintains a uniform temperature.

[0010] In the above technical solution, preferably, the low-temperature constant temperature section is provided with an evaporator, and the evaporator is used to refrigerate the low-temperature constant temperature section, and cool the entire chamber above the conveyor belt in the low-temperature constant temperature section under the action of the circulating air duct.

[0011] In the above technical solution, preferably, each surface of the product inlet, the pre-cooling section, the low-temperature constant temperature section, the retemperature section and the product outlet adopts an insulating shell, and a double sealing structure is adopted at the connecting joints.

[0012] In the above technical solution, preferably, the connection positions between the product inlet, the pre-cooling section, the low-temperature constant temperature section, the retemperature section and the product outlet are all treated with cold bridge breaking, and the outer edge sealing strip at the connecting joint is provided with a heating component.

[0013] In the above technical solution, preferably, each box of the low-temperature tunnel furnace production line is provided with a dry air introduction component for introducing dry air into the interior of the low-temperature tunnel furnace production line.

[0014] In the above technical solution, preferably, the conveyor belt is connected to a variable frequency motor, and the conveying speed of the conveyor belt is adjusted by the variable frequency motor.

[0015] In the above technical solution, preferably, the low-temperature tunnel furnace production line device includes a preset number of groups of low-temperature constant temperature sections, which are arranged between the pre-cooling section and the retemperature section, and a group of evaporators is arranged in each group of low-temperature constant temperature sections. The preset number of groups of evaporators are connected to a preset number of groups of refrigeration equipment for cooling.

[0016] In the above technical solution, preferably, a damper is provided on the circulating air duct, and the circulating air volume can be adjusted by adjusting the damper.

[0017] In the above technical solution, preferably, each box of the low-temperature tunnel furnace production line is provided with a preset number of groups of circulation fans.

[0018] In the above technical solution, preferably, a wiper and a drying mechanism are provided on the conveyor belt, the wiper is used to wipe the conveyor belt, and the drying mechanism is used to dry the conveyor belt.

[0019] Compared with the prior art, the utility model has the following beneficial effects: by pre-cooling the product through the various components of the device, cooling it to the preset temperature and restoring it to room temperature, it is possible to prevent the product from directly entering a low-temperature state or being directly exposed from a low-temperature state to cause product damage; the circulating air duct improves the uniformity of the temperature in the working chamber of the tunnel furnace, while preventing condensation of the product; the construction of a low-temperature tunnel furnace production line can realize continuous production of products with high production efficiency and low total energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a low-temperature tunnel furnace production line device disclosed in one embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional schematic diagram of a low-temperature tunnel furnace production line device disclosed in one embodiment of the utility model;

[0022] Figure 3 The present invention is a schematic structural diagram of a low-temperature constant temperature section disclosed in an embodiment of the present invention.

[0023] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0024] 1. Product inlet, 2. Pre-cooling section, 3. Low temperature constant temperature section, 4. Retemperature section, 5. Product outlet, 6. Conveyor belt, 7. Tunnel furnace working chamber, 8. Circulating air duct, 9. Insulation shell, 10. Sealing strip, 11. Frequency conversion motor, 12. Air door, 13. Centrifugal fan, 14. Air outlet, 15. Evaporator, 16. Dry air inlet assembly. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0027] like Figure 1 and Figure 2 As shown, a low-temperature tunnel furnace production line device provided by the utility model includes: a product inlet 1, a pre-cooling section 2, a low-temperature constant temperature section 3, a re-temperature section 4, a product outlet 5 and a conveyor belt 6;

[0028] The product inlet 1, the pre-cooling section 2, the low temperature constant temperature section 3, the re-temperature section 4 and the product outlet 5 are sequentially connected to each other to form a low temperature tunnel furnace production line, and a conveyor belt 6 is arranged through the low temperature tunnel furnace production line, and a tunnel furnace working chamber 7 is formed above the conveyor belt 6;

[0029] The pre-cooling section 2 conveys the conveyor belt 6 to the products in the current area for pre-cooling;

[0030] The low temperature constant temperature section 3 cools the products transported to the current area by the conveyor belt 6 to a preset temperature;

[0031] The re-warming section 4 restores the products transported to the current area by the conveyor belt 6 to room temperature;

[0032] A circulating air duct 8 is arranged in the pre-cooling section 2, the low-temperature constant temperature section 3 and the re-temperature section 4, so that each area of ​​the tunnel furnace working chamber 7 maintains a uniform temperature.

[0033] In this embodiment, the various components of the device are used to pre-cool the product, cool it to a preset temperature, and restore it to room temperature, so as to prevent the product from directly entering a low-temperature state or being directly exposed from a low-temperature state to cause product damage. The circulating air duct 8 improves the uniformity of the temperature in the tunnel furnace working chamber 7 and prevents condensation of the product. The construction of the low-temperature tunnel furnace production line can realize continuous production of products with high production efficiency and low total energy consumption.

[0034] Specifically, the low-temperature tunnel furnace is constructed as a production line, which can produce continuously, with higher production efficiency and lower total energy consumption. The low-temperature tunnel furnace can be combined with the high-temperature tunnel furnace to form a ring production line, which can cycle a large number of high and low temperature experiments, with low energy consumption, small footprint and high efficiency.

[0035] The function of the pre-cooling section 2 is to slowly cool down the products on the tunnel line; the function of the low-temperature constant temperature section 3 is to constantly set the low-temperature environment, so that the products can have enough time in the low-temperature environment to achieve an effect similar to low-temperature preservation; the function of the rewarming section 4 is to slowly return the products to room temperature to prevent condensation from coming out of the low-temperature products directly, causing product damage.

[0036] The structure of the circulating air duct 8 in the tunnel furnace can make the temperature of each point on the tunnel line conveyor belt 6 be in a similar state, thereby controlling the temperature uniformity in the tunnel furnace.

[0037] like Figure 3 As shown, during the implementation process, the circulating air duct 8 can be connected to the centrifugal fan 13 through a variable frequency motor, and the circulating wind speed can be controlled by controlling the speed of the centrifugal fan 13 through the variable frequency motor. By arranging an air outlet 14 on the centrifugal fan 13, the air in the circulating air duct 8 can be drawn out of the circulating air duct 8.

[0038] In the above embodiment, preferably, the low-temperature constant temperature section 3 is provided with an evaporator 15, which is used to cool the low-temperature constant temperature section 3, and transfer the cold energy to the entire chamber above the conveyor belt 6 in the low-temperature constant temperature section 3 under the action of the circulating air duct 8, so as to achieve the purpose of cooling.

[0039] In the above embodiment, preferably, each surface of the product inlet 1, the pre-cooling section 2, the low temperature constant temperature section 3, the re-temperature section 4 and the product outlet 5 adopts an insulating shell 9, and the connection joints adopt a double sealing structure, and the double sealing structure is preferably a double-layer sealing strip 10. Through the above insulation measures, the cold in the low temperature tunnel furnace will not be transmitted to the outside, preventing the product from generating condensed water.

[0040] In the above embodiment, preferably, the connection positions between the product inlet 1, the pre-cooling section 2, the low-temperature constant temperature section 3, the retemperature section 4 and the product outlet 5 are all treated with cold bridge breaking, and the outer edge sealing strip 10 at the connecting joint is provided with a heating component to isolate the cold and prevent internal condensation.

[0041] In the above embodiment, preferably, each box of the low-temperature tunnel furnace production line is provided with a dry air introduction component 16, which is used to introduce dry air into the tunnel furnace working chamber 7 inside the low-temperature tunnel furnace production line to form a slight positive pressure to prevent internal condensation. Specifically, condensed water will be produced on the metal surface at low temperatures, and water will have an impact on both electrical equipment and products. Therefore, dry air is introduced to prevent condensation, and the introduction of dry air will affect the temperature control performance. The dry air introduction position is determined through multiple experimental optimizations. First, add heated air circulation at the inlet to ensure that the cold air does not overflow, and then ensure the pre-cooling function of the product. The product at the outlet needs to be reheated, and it is also necessary to ensure that the cold air does not overflow.

[0042] In the above embodiment, preferably, the conveyor belt 6 is connected to the variable frequency motor 11 , and the conveying speed of the conveyor belt 6 is adjusted by the variable frequency motor 11 , thereby adjusting the time the product is in the low temperature constant temperature section 3 .

[0043] In the above embodiment, preferably, the low-temperature tunnel furnace production line device includes a preset number of groups of low-temperature constant temperature sections 3, which are arranged between the pre-cooling section 2 and the re-temperature section 4, forming a low-temperature constant temperature area of ​​the entire low-temperature tunnel furnace production line, and each group of low-temperature constant temperature sections 3 is provided with a group of evaporators 15, and the preset number of groups of evaporators 15 are connected to refrigerate using one or more groups of refrigeration equipment. In the implementation process, the number of low-temperature constant temperature sections 3 is set according to the required length of the low-temperature constant temperature area.

[0044] In the above embodiment, preferably, a damper 12 is provided on the circulating air duct 8, and the circulating air volume can be adjusted by adjusting the damper 12, so that the air volume on both sides can be more accurately controlled, thereby ensuring the temperature uniformity in the tunnel furnace.

[0045] In the above embodiment, preferably, each box of the low-temperature tunnel furnace production line is provided with one or more groups of circulation fans to ensure uniform temperature inside the low-temperature tunnel furnace production line.

[0046] In the above embodiment, preferably, a wiper and a drying mechanism are provided on the conveyor belt 6 , the wiper is used to wipe the conveyor belt 6 , and the drying mechanism is used to dry the conveyor belt 6 .

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low temperature tunnel furnace production line device, characterized in that: include: Product entrance, pre-cooling section, low temperature constant temperature section, re-temperature section, product exit and conveyor belt; The product inlet, the pre-cooling section, the low-temperature constant temperature section, the re-temperature section and the product outlet are sequentially connected to each other to form a low-temperature tunnel furnace production line, and the conveyor belt is arranged through the low-temperature tunnel furnace production line, and a tunnel furnace working chamber is formed above the conveyor belt; The pre-cooling section pre-cools the products transported by the conveyor belt to the current area; The low temperature constant temperature section cools down the products transported to the current area by the conveyor belt to a preset temperature; The re-warming section restores the products transported to the current area by the conveyor belt to room temperature; Circulating air ducts are arranged in the pre-cooling section, the low-temperature constant temperature section and the re-temperature section, so that each area of ​​the working chamber of the tunnel furnace maintains a uniform temperature.

2. The low-temperature tunnel furnace production line device according to claim 1 is characterized in that: The low-temperature constant temperature section is provided with an evaporator, and the evaporator is used to refrigerate the low-temperature constant temperature section, and the entire chamber above the conveyor belt in the low-temperature constant temperature section is cooled under the action of the circulating air duct.

3. The low-temperature tunnel furnace production line device according to claim 2 is characterized in that: Each surface of the product inlet, the pre-cooling section, the low-temperature constant temperature section, the re-temperature section and the product outlet adopts a heat-insulating shell, and the connecting joints adopt a double sealing structure.

4. The low-temperature tunnel furnace production line device according to claim 3 is characterized in that: The connection positions among the product inlet, the pre-cooling section, the low-temperature constant temperature section, the re-temperature section and the product outlet are all treated with cold bridge breaking, and the outer edge sealing strip at the connection joint is provided with a heating component.

5. The low-temperature tunnel furnace production line device according to claim 4, characterized in that: Each box of the low-temperature tunnel furnace production line is provided with a dry air introduction component for introducing dry air into the interior of the low-temperature tunnel furnace production line.

6. The low-temperature tunnel furnace production line device according to claim 1, characterized in that: The conveyor belt is connected to a variable frequency motor, and the conveying speed of the conveyor belt is adjusted by the variable frequency motor.

7. The low-temperature tunnel furnace production line device according to claim 2, characterized in that: It includes a preset number of groups of low-temperature constant temperature sections, which are arranged between the pre-cooling section and the re-temperature section. Each group of low-temperature constant temperature sections is provided with a group of evaporators, and the preset number of groups of evaporators are connected to a preset number of groups of refrigeration equipment for cooling.

8. The low-temperature tunnel furnace production line device according to claim 1, characterized in that: The circulating air duct is provided with an air door, and the circulating air volume can be adjusted by adjusting the air door.

9. The low-temperature tunnel furnace production line device according to claim 1, characterized in that: Each box of the low-temperature tunnel furnace production line is provided with a preset number of groups of circulation fans.

10. The low-temperature tunnel furnace production line device according to claim 1, characterized in that: The conveyor belt is provided with a wiper and a drying mechanism, wherein the wiper is used for wiping water from the conveyor belt, and the drying mechanism is used for drying the conveyor belt.

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