Constant-speed cooling device for resistance furnace at different cooling rates

Abstract

The utility model discloses a constant-speed cooling device for a resistance furnace at different cooling rates, which relates to the technical field of resistance furnace cooling devices and comprises a resistance furnace top, a heat dissipation mechanism, a cylinder mechanism, a sliding mechanism and a PLC (programmable logic controller) control system. The cooling rate can be accurately controlled through the synergistic effect of the PLC control system, the air cylinder mechanism, the sliding mechanism and the heat dissipation mechanism; the problem that the cooling rate of a traditional resistance furnace is difficult to control is effectively solved, it is ensured that the temperature change of a workpiece is stable in the cooling process, and it is avoided that the performance and quality are affected due to too fast or too slow temperature change; the cooling rate can be flexibly adjusted according to different requirements of different products and processes on the cooling rate; a group of constant-speed cooling devices can be additionally arranged in each independent working area of the same resistance furnace and are controlled separately, so that the constant-speed cooling requirement of each area of the resistance furnace is met, and the cooling requirements of different products are met; and therefore, the overall quality of products is improved, the defective rate is reduced, and higher economic benefits are brought to enterprises.

Description

Technical Field

[0001] This utility model relates to the technical field of resistance furnace cooling devices, specifically a uniform cooling device for resistance furnaces at different cooling rates. Background Technology

[0002] Resistance furnaces, as common heating equipment, are widely used in industrial production for heat treatment of various materials, metal smelting, and other processes. In these processes, after the workpiece is heated to a high temperature in the resistance furnace, it needs to be cooled at a certain rate to ensure its performance and quality. However, traditional resistance furnaces have some problems in the cooling process:

[0003] 1. Difficulty in controlling the cooling rate: Traditional resistance furnaces usually use natural cooling or simple ventilation cooling methods, which cannot precisely control the cooling rate. This may cause the temperature of the workpiece to change too quickly or too slowly during the cooling process, affecting its performance and quality. For example, for some high-precision metal parts, an excessively fast cooling rate may cause stress concentration inside the parts, thereby reducing their mechanical strength and service life.

[0004] 2. Inability to meet the cooling requirements of different products: Different products and processes have different requirements for cooling rate. Some products need to be cooled slowly to avoid thermal stress, while others need to be cooled quickly to obtain specific microstructures. Traditional resistance furnaces cannot flexibly adjust the cooling rate and are difficult to meet these diverse needs.

[0005] 3. Lack of automated control: The traditional resistance furnace cooling process mostly relies on manual operation and lacks automated control methods. This not only increases the labor intensity of operators, but also makes the cooling process unstable due to human factors, which in turn affects the consistency of product quality.

[0006] 4. Low heat dissipation efficiency: In the traditional resistance furnace cooling process, the heat dissipation efficiency is low, resulting in a long cooling time and high energy consumption. This not only increases production costs but also reduces production efficiency. Utility Model Content

[0007] The purpose of this invention is to provide a uniform cooling device for resistance furnaces at different cooling rates, in order to solve the problems mentioned in the background art, such as difficulty in controlling the cooling rate, inability to meet the cooling requirements of different products, lack of automated control, and low heat dissipation efficiency of traditional resistance furnaces during the cooling process.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a uniform cooling device for a resistance furnace at different cooling rates, comprising a furnace top, a heat dissipation mechanism and a cylinder mechanism disposed on the top surface of the furnace top, the heat dissipation mechanism and the cylinder mechanism being connected as one unit by a sliding mechanism, and the cylinder mechanism being connected to a PLC control system; a cylindrical cooling channel with internal and external communication is disposed on the furnace top, a heat dissipation mechanism mounting seat is disposed around the cooling channel on the top surface of the furnace top and a heat dissipation mechanism is mounted thereon, and a cylinder bracket is disposed on the side of the heat dissipation mechanism mounting seat and a cylinder mechanism is mounted thereon; the heat dissipation mechanism includes a heat dissipation baffle bracket and a cylindrical heat dissipation baffle disposed on its inner side, and a disc-shaped zirconium-containing heat insulation film is disposed at the bottom end of the heat dissipation baffle; the cylinder mechanism includes a cylinder and a two-position two-way solenoid valve connected thereto; the sliding mechanism includes a first fixed pulley, a second fixed pulley and a third fixed pulley disposed on the heat dissipation baffle bracket, and a steel wire rope is disposed on the three fixed pulleys.

[0009] Preferably, the heat dissipation baffle bracket is welded from channel steel and mounted on the heat dissipation mechanism mounting base. Positioning guide rods are vertically mounted on the front and rear sides of the cooling channel via the heat dissipation baffle bracket. A sliding sleeve is fitted on each of the two positioning guide rods, and the two sliding sleeves are mounted together on the cylindrical heat dissipation baffle. A cross-shaped round steel bracket is supported inside the heat dissipation baffle above the zirconium-containing heat insulation film. A hoisting cylinder coaxial with the heat dissipation baffle is mounted above the round steel bracket. Three hoisting nuts are evenly distributed in a ring at the top of the hoisting cylinder, and the three hoisting nuts are connected to a sliding mechanism.

[0010] Preferably, the first fixed pulley is located at the top center of the heat dissipation baffle bracket, the second fixed pulley is located on the top of the heat dissipation baffle bracket near the cylinder bracket, and the third fixed pulley is located below the second fixed pulley. A wire rope is provided through the first fixed pulley, the second fixed pulley, and the third fixed pulley. The wire rope is divided into three strands above the hoisting cylinder and connected to three hoisting nuts by rope buckles.

[0011] Preferably, the cylinder mechanism includes a cylinder horizontally mounted on the cylinder bracket, the cylinder being connected to a pneumatic source via a two-position two-way solenoid valve; the front end of the piston rod of the cylinder being connected to the wire rope; and the two-position two-way solenoid valve being electrically connected to the PLC control system.

[0012] Preferably, the PLC control system includes an electrically connected PID controller and a temperature sensor, the temperature sensor detecting the temperature of the resistance furnace in real time.

[0013] Preferably, multiple sets of the uniform cooling device are provided, and one set can be installed in each independent working area of ​​the same resistance furnace.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the coordinated action of a PLC control system, cylinder mechanism, sliding mechanism, and heat dissipation mechanism, can accurately monitor and adjust the cooling rate in real time according to the set cooling rate requirements. It effectively solves the problem of difficult-to-control cooling rate in traditional resistance furnaces, ensuring stable temperature changes in the workpiece during cooling and avoiding impacts on its performance and quality due to excessively rapid or slow temperature changes.

[0016] 2. The uniform cooling device of this utility model can flexibly adjust the cooling rate according to the different requirements of cooling rate for different products and processes. A set of uniform cooling devices can be installed in each independent working area of ​​the same resistance furnace, and controlled separately to achieve uniform cooling in each zone of the furnace, thereby meeting the cooling needs of different products. This greatly improves the applicability of the resistance furnace, enabling it to meet the production needs of a wider variety of products.

[0017] 3. Precise cooling rate effectively prevents product performance from being affected by excessively rapid temperature changes, thereby improving overall product quality. The uniform cooling device of this invention ensures stable temperature changes in the workpiece during cooling, avoiding problems such as stress concentration and uneven microstructure caused by excessively rapid temperature changes. This improves the product's mechanical strength, hardness, wear resistance, and other performance indicators, enhancing overall product quality, reducing defect rates, and bringing greater economic benefits to the enterprise.

[0018] 4. The uniform cooling device of this invention achieves automated control, reducing manual operation and lowering the labor intensity of operators. The PLC control system can automatically monitor and adjust the cooling rate without frequent manual intervention, improving the stability and consistency of the cooling process. This not only improves production efficiency but also reduces quality fluctuations caused by human factors, ensuring product quality stability.

[0019] 5. The heat dissipation mechanism of this utility model is reasonably designed. The heat dissipation baffle is stably raised and lowered by the positioning guide rod, and the heat is dispersed through the cooling channel, resulting in high heat dissipation efficiency. The efficient heat dissipation design not only shortens the cooling time but also reduces energy consumption, improves production efficiency, and reduces production costs.

[0020] 6. The uniform cooling device of this utility model has a simple structure, with compact connections between components, making it easy to install and maintain. The heat dissipation baffle bracket is welded from channel steel, ensuring sturdiness and reliability. The design of the cylinder mechanism and sliding mechanism is also relatively simple, facilitating operation and maintenance. This makes the uniform cooling device of this utility model highly reliable and stable in practical applications, reducing equipment failure rates and maintenance costs, and extending the service life of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure;

[0023] Figure 3 for Figure 1 Top view;

[0024] Figure 4 This is a schematic diagram of the heat dissipation baffle and its associated structures.

[0025] Figure 5 for Figure 4 Top view;

[0026] Figure 6 A schematic diagram of three fixed pulleys;

[0027] In the diagram: resistance furnace top-1, cooling channel-11, heat dissipation mechanism mounting base-12, cylinder bracket-13, heat dissipation mechanism-2, heat dissipation baffle bracket-21, positioning guide rod-22, sliding sleeve-23, heat dissipation baffle-24, zirconium-containing heat insulation film-25, round steel bracket-26, hoisting cylinder-27, hoisting nut-28, cylinder mechanism-3, cylinder-31, two-position two-way solenoid valve-32, sliding mechanism-4, first fixed pulley-41, second fixed pulley-42, third fixed pulley-43, wire rope-44. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0029] Please refer to Figure 1-6 , Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure; Figure 3 for Figure 1 Top view; Figure 4 This is a schematic diagram of the heat dissipation baffle and its associated structures. Figure 5 for Figure 4 Top view; Figure 6This is a schematic diagram of three fixed pulleys.

[0030] This utility model provides a uniform cooling device for a resistance furnace under different cooling rates, including a furnace top 1. A heat dissipation mechanism 2 and a cylinder mechanism 3 are provided on the top surface of the furnace top 1. The heat dissipation mechanism 2 and the cylinder mechanism 3 are connected as one unit by a sliding mechanism 4. The cylinder mechanism 3 is connected to a PLC control system.

[0031] The top of the resistance furnace 1 is provided with a cylindrical cooling channel 11 that is connected to the inside and outside. A heat dissipation mechanism mounting base 12 is provided around the cooling channel 11 on the top surface of the resistance furnace 1 and a heat dissipation mechanism 2 is installed thereon. At the same time, a cylinder bracket 13 is provided on the side of the heat dissipation mechanism mounting base 12 and a cylinder mechanism 3 is installed thereon.

[0032] The heat dissipation mechanism 2 includes a rectangular heat dissipation baffle bracket 21 mounted on the heat dissipation mechanism mounting base 12. The heat dissipation baffle bracket 21 is welded from channel steel. Positioning guide rods 22 are vertically mounted on the front and rear sides of the cooling channel 11 via the heat dissipation baffle bracket 21. A sliding sleeve 23 is fitted on each of the two positioning guide rods 22. A cylindrical heat dissipation baffle 24 is mounted between the two sliding sleeves 23 and fixed thereto. A disc-shaped zirconium-containing heat insulation film 25 is mounted at the bottom end of the heat dissipation baffle 24. A cross-shaped round steel bracket 26 is mounted above the zirconium-containing heat insulation film 25 and supports and fixes it inside the heat dissipation baffle 24. A lifting cylinder 27 coaxial with the heat dissipation baffle 24 is mounted above the round steel bracket 26. Three lifting nuts 28 are evenly distributed in a ring at the top end of the lifting cylinder 27. The three lifting nuts 28 are connected to a sliding mechanism 4.

[0033] The sliding mechanism 4 includes a first fixed pulley 41 located at the top center of the heat dissipation baffle bracket 21, a second fixed pulley 42 located at the top edge of the heat dissipation baffle bracket 21 near the cylinder bracket 13 and at the same horizontal height as the first fixed pulley 41, and a third fixed pulley 43 located below the second fixed pulley 42. A wire rope 44 is provided together by the first fixed pulley 41, the second fixed pulley 42, and the third fixed pulley 43. The wire rope 44 is divided into three strands above the hoisting cylinder 27 and connected to three hoisting nuts 28 by rope buckles.

[0034] The cylinder mechanism 3 includes a cylinder 31 horizontally arranged on the cylinder bracket 13. The cylinder 31 is connected to the air source through a two-position two-way solenoid valve 32. The front end of the piston rod of the cylinder 21 is connected to the wire rope 44. The two-position two-way solenoid valve 32 is electrically connected to the PLC control system.

[0035] The PLC control system includes an electrically connected PID controller and a temperature sensor. The temperature sensor detects the temperature of the resistance furnace in real time. The PID controller accurately receives the temperature signal from the temperature sensor and feeds it back to the PLC program. The PLC program accurately monitors and adjusts the cooling rate in real time by controlling the two-position two-way solenoid valve 32 according to the preset cooling rate requirements.

[0036] When the cooling rate is low, the PLC control system sends a command to the two-position two-way solenoid valve 32 based on the actual cooling rate monitored in real time. The two-position two-way solenoid valve 32 is activated, and the cylinder 31 retracts at a constant speed, driving the wire rope 44 to lift the heat dissipation baffle 24 through three fixed pulleys. The heat dissipation baffle 24 is stably lifted by the positioning guide rod 22, and the heat is dispersed through the cooling channel, thereby accelerating the cooling speed.

[0037] When the cooling rate is fast, the PLC control system sends a command to the two-position two-way solenoid valve 32 based on the actual cooling rate monitored in real time. The two-position two-way solenoid valve 32 is activated, and the cylinder 31 extends at a constant speed. Under the action of the weight of the heat dissipation baffle 24, the wire rope 44 descends at a constant speed through three fixed pulleys. The heat dissipation baffle 24 descends stably through the positioning guide rod 22 and blocks the cooling channel 11, preventing heat from being dissipated. At the same time, the PLC control system can also send a command to the heating element to heat it based on the actual cooling rate monitored, thereby meeting the set cooling rate requirements.

[0038] By installing a uniform cooling device in each independent working area of ​​the same resistance furnace and controlling them separately, the uniform cooling requirements of each zone of the resistance furnace can be achieved, thereby meeting the overall cooling rate requirements of the resistance furnace.

[0039] This invention enables the resistance furnace to achieve uniform cooling at different rates, meeting the varying cooling rate requirements of products. A precise cooling rate effectively prevents product performance from being affected by excessively rapid temperature changes, thereby improving overall product quality. In particular, a uniform cooling device is crucial for manufacturing high-quality products.

[0040] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates, comprising an electric resistance furnace roof (1), characterized in that: The top surface of the resistance furnace roof (1) is provided with a heat dissipation mechanism (2) and a cylinder mechanism (3), the heat dissipation mechanism (2) and the cylinder mechanism (3) are connected into an integral whole through a sliding mechanism (4), the cylinder mechanism (3) is connected with a PLC control system; the resistance furnace roof (1) is provided with a cylindrical cooling channel (11) in communication with the inside and outside, the top surface of the resistance furnace roof (1) is provided with a heat dissipation mechanism mounting seat (12) around the cooling channel (11) and is mounted with the heat dissipation mechanism (2), meanwhile, the side position of the heat dissipation mechanism mounting seat (12) is provided with a cylinder support (13) and is mounted with the cylinder mechanism (3); the heat dissipation mechanism comprises a heat dissipation baffle support (21) and a cylindrical heat dissipation baffle (24) arranged on the inner side of the heat dissipation baffle support (21), the bottom end of the heat dissipation baffle (24) is provided with a disc-shaped zirconium-containing heat insulation film (25); the cylinder mechanism (3) comprises a cylinder (31) and a two-position two-way electromagnetic valve (32) connected thereto; the sliding mechanism (4) comprises a first fixed pulley (41), a second fixed pulley (42) and a third fixed pulley (43) arranged on the heat dissipation baffle support (21), and the three fixed pulleys are jointly provided with a steel wire rope (44).

2. The device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates according to claim 1, characterized in that: The heat dissipation baffle support (21) is welded by channel steel and is arranged on the heat dissipation mechanism mounting seat (12), the heat dissipation baffle support (21) is vertically provided with a positioning guide rod (22) on the front and rear sides of the cooling channel (11), respectively, one sliding sleeve (23) is arranged on each of the two positioning guide rods (22), and the two sliding sleeves (23) are jointly arranged on the cylindrical heat dissipation baffle (24); a cross-shaped round steel support (26) is arranged and supported inside the heat dissipation baffle (24) above the zirconium-containing heat insulation film (25), a hoisting cylinder (27) coaxial with the heat dissipation baffle (24) is arranged above the round steel support (26), three hoisting nuts (28) are uniformly distributed on the top end of the hoisting cylinder (27), and the three hoisting nuts (28) are jointly connected with the sliding mechanism (4).

3. The device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates according to claim 2, characterized in that: The first fixed pulley (41) is arranged at the top center of the heat dissipation baffle support (21), the second fixed pulley (42) is arranged at the top of the heat dissipation baffle support (21) near one side of the cylinder support (13), and the third fixed pulley (43) is arranged below the second fixed pulley (42), the first fixed pulley (41), the second fixed pulley (42) and the third fixed pulley (43) are jointly provided with the steel wire rope (44), and the steel wire rope (44) is divided into three strands above the hoisting cylinder (27) and is connected with the three hoisting nuts (28) by means of a rope buckle.

4. The device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates according to claim 3, characterized in that: The cylinder mechanism (3) comprises a cylinder (31) arranged horizontally on the cylinder support (13), the cylinder (31) is connected with a gas source through a two-position two-way electromagnetic valve (32); the piston shaft rod front end of the cylinder (31) is connected with the steel wire rope (44); the two-position two-way electromagnetic valve (32) is electrically connected with the PLC control system.

5. The device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates according to claim 4, characterized in that: The PLC control system comprises a PID controller and a temperature sensor which are electrically connected, and the temperature sensor detects the temperature of the electric resistance furnace in real time.

6. The device for uniform temperature reduction of an electric resistance furnace at different temperature reduction rates according to claim 5, characterized in that: The uniform cooling device is provided with multiple groups, and each independent working area of the same electric resistance furnace can be additionally provided with a group.

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