Protective device for protecting pushed slab kiln in nitrogen atmosphere

Abstract

The utility model discloses a protective device of a nitrogen atmosphere protection pushed slab kiln, which comprises a kiln body, the kiln body comprises a cooling section, a protective cover, a flow guide cover body and a hydraulic cylinder are arranged on the kiln body, and the protective cover is arranged in the kiln body of the cooling section and is matched with the flow guide cover body to form a low-temperature cooling layer. The protective cover is made of metal materials which are resistant to high temperature and good in heat conduction performance and comprises a cooling space, the flow guide cover body is installed on the protective cover, the hydraulic cylinder is installed on the furnace body of the cooling section, the output end of the hydraulic cylinder is fixedly connected with the flow guide cover body, and a flow guide cavity is formed in the flow guide cover body. A plurality of flow guide cavities are formed in the flow guide cover body, a plurality of nozzles communicated with the flow guide cavities are mounted on the flow guide cover body, and the flow guide cavities are communicated and matched with a cooling medium supply system on the kiln body. Product surface damage, scratches or roughness increase are prevented, and the finished product quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of push plate kilns, and more specifically, to a protective device for protecting a push plate kiln in a nitrogen atmosphere. Background Art

[0002] The nitrogen atmosphere protection pusher kiln mainly includes a feeder responsible for continuously and evenly feeding the materials or products to be processed into the kiln, a kiln body which is the main part of the pusher kiln and is divided into a drying section, a calcining section and a cooling section, a heating system used to provide necessary heat to complete the sintering of the materials or products, a pusher located at the discharge port of the kiln and responsible for pushing the sintered products or materials out of the kiln, a material preparation cooler behind the pusher for cooling the sintered materials or products, a nitrogen supply system used to provide stable and pure nitrogen to the inside of the kiln to create an oxygen-free or low-oxygen sintering environment, and a control system responsible for the automatic operation and monitoring of the entire pusher kiln;

[0003] Currently, products enter the cooling section of the kiln body through a conveying system, and cooling media such as water, air, and inert gas are usually used to cool the products in the cooling section. The cooling medium supply system evenly distributes the liquid cooling medium or the air cooling medium to the cooling section of the kiln body through specific pipes or nozzles. The liquid cooling medium or the air cooling medium directly contacts the surface of the product, absorbs and takes away the heat released by the product, thereby achieving rapid cooling of the product; but when the flow rate of the liquid cooling medium or the air cooling medium is too high, direct contact with the product may cause impact or erosion on the surface of the product, causing damage, scratches or increased roughness on the surface of the product, thereby reducing the quality of the finished product. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a protective device for a push-plate kiln with nitrogen atmosphere, which can prevent the liquid cooling medium or the air cooling medium from being in direct contact with the product due to excessive flow and causing impact or erosion on the product surface, prevent damage, scratches or increased roughness on the product surface, and improve the quality of the finished product.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A protective device for a nitrogen atmosphere protection pusher kiln, including a kiln body, the kiln body includes a cooling section, and a protective cover for preventing the cooling medium from directly contacting the product, a diversion cover body cooperating with the protective cover, and a hydraulic cylinder for moving the protective cover are provided on the kiln body. The protective cover is placed in the furnace body of the cooling section and is made of a metal material with high temperature resistance and good thermal conductivity. The protective cover includes a cooling space surrounding the product in the furnace body of the cooling section. The diversion cover body is installed on the protective cover and covers the protective cover, and the protective cover and the diversion cover body cooperate to form a low-temperature cooling layer. The hydraulic cylinder is installed on the furnace body of the cooling section, and the output end of the hydraulic cylinder is fixedly connected to the diversion cover body. A diversion chamber surrounding the protective cover is opened on the diversion cover body, and a plurality of nozzles communicated with the diversion chamber are installed on the diversion cover body. The diversion chamber on the diversion cover body is communicated and cooperated with the cooling medium supply system on the kiln body.

[0007] Further, a plurality of drainage grooves corresponding to the low-temperature cooling layer are opened on the protective cover.

[0008] Further, heat insulation cotton is fixed on the inner wall of the diversion chamber of the diversion cover body.

[0009] Further, a drainage pipe communicated with the diversion chamber is installed on the diversion cover body, and the drainage pipe is communicated and cooperated with the cooling medium supply system on the kiln body.

[0010] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows: By being communicated and cooperated with the cooling medium supply system on the kiln body through the drainage pipe, it is avoided that the excessive flow rate of the liquid cooling medium or the gas cooling medium directly contacting the product will cause impact or erosion on the product surface, preventing surface damage, scratches or increased roughness of the product, and improving the finished product quality of the product. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0012] Figure 2 It is a schematic structural diagram of the cooperation between the protective cover and the diversion cover body.

[0013] Figure 3 It is a schematic structural diagram of the cooperation between the protective cover and the drainage groove.

[0014] Figure 4 It is a schematic structural diagram of the cooperation between the diversion cover body and the drainage pipe.

[0015] In the figure: product 001, kiln body 1, cooling section 2, protective cover 3, diversion cover body 4, hydraulic cylinder 5, cooling space 6, low-temperature cooling layer 7, diversion chamber 8, nozzle 9, drainage groove 10, heat insulation cotton 11, drainage pipe 12. Detailed Embodiment

[0016] Refer toFigures 1 to 4 Further description is made on the embodiments of the present utility model.

[0017] A protection device for a nitrogen atmosphere protection pusher kiln, comprising a kiln furnace body 1. The kiln furnace body 1 includes a cooling section 2. A protective cover 3 for preventing the cooling medium from directly contacting the product 001, a diversion hood body 4 cooperating with the protective cover 3, and a hydraulic cylinder 5 for moving the protective cover 3 are provided on the kiln furnace body 1. The protective cover 3 is placed in the furnace body of the cooling section 2, and the protective cover 3 is made of a metal material with high temperature resistance and good heat conduction performance. The protective cover 3 includes a cooling space 6 surrounding the product 001 in the furnace body of the cooling section 2. The diversion hood body 4 is installed on the protective cover 3 and covers the protective cover 3, and the protective cover 3 and the diversion hood body 4 cooperate to form a low-temperature cooling layer 7. A plurality of drainage grooves 10 corresponding to the low-temperature cooling layer 7 are formed on the protective cover 3. The hydraulic cylinder 5 is installed on the furnace body of the cooling section 2, and the output end of the hydraulic cylinder 5 is fixedly connected to the diversion hood body 4 so as to drive the diversion hood body 4 to move when the hydraulic cylinder 5 works. A diversion chamber 8 surrounding the protective cover 3 is formed on the diversion hood body 4. A plurality of nozzles 9 communicating with the diversion chamber 8 are installed on the diversion hood body 4. A drainage pipe 12 communicating with the diversion chamber 8 is installed on the diversion hood body 4, and the drainage pipe 12 is communicated and cooperated with the cooling medium supply system on the kiln furnace body 1.

[0018] Working principle: When product 001 enters the furnace body of the cooling section 2, the flow guide cover body 4 of the hydraulic cylinder 5 working belt and the protective cover 3 connected to the flow guide cover body 4 approach product 001 and surround product 001, placing product 001 in the cooling space 6 of the protective cover 3. The cooling medium enters the flow guide chamber 8 of the flow guide cover body 4 through the lead pipe via the cooling medium supply system on the kiln furnace body 1 and is sprayed into the low-temperature cooling layer 7 through the nozzle 9 communicating with the flow guide chamber 8 to cool the protective cover 3. The protective cover 3 is made of a metal material with high temperature resistance and good heat conduction performance, which facilitates transferring the low-temperature energy of the low-temperature cooling layer 7 into the cooling space 6 to cool product 001. Moreover, the cooling medium of the low-temperature cooling layer 7 evenly and quickly covers the entire protective cover 3 along several drainage grooves 10 on the surface of the protective cover 3, thus facilitating the cooling medium of the low-temperature cooling layer 7 to evenly and quickly flow through each position of the protective cover 3, enabling the low-temperature energy to be evenly and quickly transferred into the cooling space 6 to cool product 001 evenly, improving the finished product quality of product 001. The setting of the drainage grooves 10 on the protective cover 3 shortens the low-temperature energy transfer path, facilitating the cooling medium to more quickly reduce the temperature of product 001 in the cooling space 6. At the same time, after the cooling medium of the low-temperature cooling layer 7 cools the protective cover 3, it flows into the space around product 001 in the furnace body of the cooling section 2 to cool it, thereby accelerating the cooling speed of product 001 without directly contacting product 001, further improving the finished product quality of product 001, and avoiding the impact or erosion on the surface of product 001 caused by the excessive flow rate of the liquid cooling medium or the air flow cooling medium directly contacting product 001, preventing surface damage, scratches or increased roughness of product 001, and improving the finished product quality of product 001.

[0019] The heat insulation cotton 11 is fixed on the inner wall of the flow guide chamber 8 of the flow guide cover body 4. The setting of the heat insulation cotton 11 keeps the cooling medium in the flow guide chamber 8 in a better low-temperature state, achieving the effect of cold insulation for the cooling medium in the flow guide chamber 8, facilitating the cooling medium sprayed onto the protective cover 3 through the nozzle 9 without reducing the cooling effect on the protective cover 3, and thus ensuring the cooling effect on product 001 in the cooling space 6.

[0020] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for a push-plate kiln protected by a nitrogen atmosphere, comprising a kiln body (1), the kiln body (1) comprising a cooling section (2), characterized in that: The kiln body (1) is provided with a protective cover (3) for preventing the cooling medium from directly contacting the product (001), a flow guide cover body (4) matched with the protective cover (3), and a hydraulic cylinder (5) for moving the protective cover (3); the protective cover (3) is placed in the furnace body of the cooling section (2), and the protective cover (3) is made of a metal material that is resistant to high temperatures and has good thermal conductivity; the protective cover (3) includes a cooling space (6) surrounding the product (001) in the furnace body of the cooling section (2); the flow guide cover body (4) is installed on the protective cover (3) and covers the protective cover (3). A protective cover (3) is provided, and the protective cover (3) cooperates with a flow guide cover body (4) to form a low-temperature cooling layer (7). A hydraulic cylinder (5) is installed on the furnace body of the cooling section (2), and the output end of the hydraulic cylinder (5) is fixedly connected to the flow guide cover body (4). A flow guide chamber (8) surrounding the protective cover (3) is opened on the flow guide cover body (4). A plurality of nozzles (9) connected to the flow guide chamber (8) are installed on the flow guide cover body (4). The flow guide chamber (8) on the flow guide cover body (4) is connected to and cooperates with a cooling medium supply system on the kiln furnace body (1).

2. The protective device for a nitrogen atmosphere-protected pusher kiln according to claim 1, characterized in that: The protective cover (3) is provided with a plurality of drainage grooves (10) corresponding to the low-temperature cooling layer (7).

3. The protective device for a nitrogen atmosphere-protected pusher kiln according to claim 2, characterized in that: Heat insulation cotton (11) is fixed on the inner wall of the flow guide chamber (8) of the flow guide cover body (4).

4. The protective device for a nitrogen atmosphere-protected pusher kiln according to claim 3, characterized in that: A drainage pipe (12) in communication with the drainage chamber (8) is installed on the drainage cover (4), and the drainage pipe (12) is in communication with a cooling medium supply system on the kiln body (1).

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