Pilot plant for heat treatment of steel plate

Abstract

The utility model belongs to the technical field of steel plate heat treatment and relates to a steel plate heat treatment pilot plant. The device takes a roller quenching machine as a center, and mechanisms on the two sides of the device have consistent functions and are symmetrically arranged; the mechanisms on the two sides respectively comprise a cantilever crane, a conveying roller way group, a centering mechanism, a C-shaped hook, a vehicle bottom type heating furnace and an input / output roller way group, and the functions of sample feeding centering, transferring, normalizing heating, quenching, tempering heating, slow cooling and the like can be continuously and automatically realized. According to the device, the steel plate heat treatment industrial production line is reduced in equal proportion, the industrial steel plate heat treatment process is fully reduced, unmanned automatic operation can be realized, a simple, feasible, safe and reliable test means is provided for research and development of new steel types, new steel grades and new heat treatment processes of quenched and tempered steel plates, and favorable conditions are created for shortening the research and development period and reducing the research and development cost.

Description

Technical Field

[0001] This utility model relates to the field of steel plate heat treatment technology, and in particular to a pilot-scale device for steel plate heat treatment. Background Technology

[0002] High-strength steel plates are key raw materials in equipment manufacturing, transportation, petrochemicals, and military industries, and are crucial for the large-scale, safe, and stable operation of equipment. After being rolled into shape, these steel plates require heat treatment. Different heating and cooling regimes are used to control the steel plate's microstructure and shape, resulting in superior performance.

[0003] Heat treatment of quenched and tempered steel plates typically includes processes such as normalizing, quenching, and tempering. Its characteristics are as follows: ① A wide variety of steel grades and complex heat treatment processes. Conventional quenched and tempered steel plates include low-alloy high-strength steel, marine engineering and shipbuilding steel, energy and chemical steel, pressure vessel steel, power steel, transportation steel, wear-resistant and corrosion-resistant steel, bridge and high-strength steel, and military steel, among others. The required strength, toughness, service performance, and processing performance of each type of steel plate differ significantly. The heat treatment processes employed vary considerably in terms of heating rate, heating temperature, holding time, quenching cooling rate, final cooling temperature, tempering temperature, and tempering time. Precise control of heat treatment process parameters and scientific continuous control of the heat treatment process are extremely challenging. ② A large range of steel plate specifications. Currently, quenched and tempered heat-treated steel plates can be produced with thicknesses ranging from 2 to 400 mm, widths from 900 to 5350 mm, and lengths from 3 to 25 m. Balancing the shape, surface quality, performance, and uniformity of large-span steel plates during heat treatment presents significant challenges in formulating and implementing heat treatment processes. ③ The heat treatment production line is equipped with a lot of equipment, including individual equipment such as shot blasting machine, normalizing / quenching furnace, quenching machine, tempering furnace, marking machine, straightening machine, and cooling bed, as well as supporting and auxiliary facilities such as connecting roller conveyor, hydraulic and lubrication system, three-electric system, water treatment system, and air compressor station. The heat treatment production of steel plates has high energy consumption, high equipment maintenance cost, and great difficulty in production organization.

[0004] As users' requirements for the strength, toughness, service performance, and processing performance of quenched and tempered steel plates gradually increase, steel companies are paying more and more attention to upgrading steel plate heat treatment technology and developing new steel grades. New steel grades and types with superior performance, surface quality, and plate shape are constantly emerging. However, due to constraints such as the technical level of production line equipment, energy consumption indicators, and production plans, the research and development of new steel grades, types, and processes often consumes a lot of manpower and resources, occupies a lot of normal production time, and testing pushes equipment to its limits, causing equipment damage. These unfavorable factors exacerbate the contradiction between production and research and development, and the test results often fail to meet expectations.

[0005] This invention aims to develop a pilot-scale heat treatment device for steel plates, which fully replicates actual production conditions and scales down the production line by a certain proportion. Researchers can freely design heat treatment processes without being constrained by equipment levels or production plans. It features low energy consumption and a short testing cycle, providing an effective research and development method for upgrading the performance of quenched and tempered steel plates.

[0006] Among existing patents, Chinese patent application (publication number CN221254639U) proposes a heat treatment equipment for steel plates, including a heating furnace, a quenching device, a tempering furnace and a conveying device. This patent is used for steel plate heat treatment production rather than pilot production, and its equipment configuration and functions are very different from this utility model.

[0007] Chinese patent application (publication number CN117340034A) proposes a heat treatment equipment for steel plates, which includes an uncoiler, a straightener, a cross shearer, a heating furnace and a quenching machine arranged in sequence along the running direction of the strip. This patent is used for continuous or single-piece heat treatment production of steel plates (strips), and the equipment configuration and functions are very different from this utility model.

[0008] Chinese patent application (publication number CN213232403U) proposes a heat treatment equipment for steel plates, including a heating furnace, a quenching device, and a tempering furnace. This patent is used for continuous heat treatment production of steel plates and differs greatly from the pilot heat treatment device for steel plates of this utility model in terms of equipment layout and structure, production line function and working method. Utility Model Content

[0009] To address the challenges in developing new steel grades, types, and processes for quenched and tempered steel plates, such as difficulties in production organization and coordination, a wide variety of steel grades and specifications, limited experimental processes, and high experimental costs and energy consumption, this utility model aims to provide a pilot-scale device for heat treatment of steel plates. This device proportionally reduces the scale of the production line, replicates the actual conditions of large-scale industrial production, lowers R&D costs, shortens the R&D cycle, fully leverages the technical expertise of R&D personnel, and promotes the continuous upgrading of quenched and tempered steel plates.

[0010] This invention is suitable for trial heat treatment of steel plate samples with a thickness of 3-350mm, a width of 100-550mm, and a length of 600-800mm.

[0011] The technical solution of this utility model is as follows: A pilot-scale heat treatment device for steel plates, with a roller quenching machine 9 as the center, and the mechanisms on both sides having the same function and symmetrical arrangement; the mechanisms on both sides respectively include a cantilever crane, a transport roller conveyor group, a centering mechanism, a C-hook, a car bottom heating furnace, and an input / output roller conveyor group; the roller quenching machine 9, the input / output roller conveyor group, the car bottom heating furnace, and the transport roller conveyor group are arranged in sequence; the centering mechanism is arranged on the transport roller conveyor group; the cantilever crane is used to lift the sample 2, and the C-hook is used to transport the sample 2.

[0012] The transport roller conveyor groups are symmetrically arranged at the outermost ends of both sides of the steel plate heat treatment pilot device 1. They mainly consist of multiple roller conveyors and supports 16, and adopt a centralized chain drive method with a roller speed range of 1 to 10 m / min.

[0013] The centering mechanism employs cylinder clamping mechanisms on both sides for centering the sample 2 on the transport roller assembly.

[0014] The undercarriage heating furnace is arranged on one side of the steel plate heat treatment pilot device 1. The undercarriage 18 is retractable and is used to receive the sample 2 for heating or to lift out the sample 2 after heating. The undercarriage heating furnace is a dual-purpose furnace for normalizing and tempering, with a maximum working furnace temperature of 1200℃. The heating rate and holding time can be automatically adjusted. The retraction of the undercarriage 18 and the opening and closing of the furnace door are interlocked with the lifting or moving action of the C-shaped hook, which is used to automatically load and unload the sample 2.

[0015] The lifting mechanism of the C-hook uses an electric cylinder for lifting, and the lifting is controlled by a servo control system; the lateral movement mechanism of the C-hook is driven by a servo control system.

[0016] The input / output roller conveyor group is used to connect the undercarriage heating furnace and the roller quenching machine 9, to receive and transfer the heated or quenched sample 2, and the roller speed range is 1 to 40 m / min.

[0017] The roller quenching machine 9 mainly consists of a forward high-pressure section 19, a reverse high-pressure section 20, and a low-pressure section 21. The water supply pressure of both the forward high-pressure section 19 and the reverse high-pressure section 20 is 10 bar, and the maximum water supply flow rate is 1000 m³ / s. 3 / h, low-pressure section 21 water supply pressure 3-6 bar, maximum water supply 800m³ / h. 3 / h; The flow rate of each nozzle is controlled by the control valve group 23 on each branch water supply pipeline 22; The upper roller 25 of the roller quenching machine 9 is connected to the movable frame 24, and the movable frame 24 is controlled to lift and lower to drive the upper roller 25, and to control the roller gap of the roller quenching machine 9, with the roller gap adjustment range of 0 to 400 mm; The transmission system 26 is connected to the upper roller 25 and the lower roller 27 respectively to drive them to rotate and transfer the sample 2 to the designated position; The linear speed range of the roller track of the upper roller 25 and the lower roller 27 is 1 to 40 m / min.

[0018] The steel plate heat treatment pilot plant is capable of performing both forward and reverse heat treatment. The forward heat treatment process is as follows: forward sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading. The reverse heat treatment process is as follows: reverse sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading.

[0019] During positive heat treatment, a conveyor roller assembly on one side is used for loading, transporting, and positioning sample 2. The conveyor roller assembly transports sample 2 to the location of a C-hook on one side. Simultaneously, the bottom of the undercarriage of the undercarriage-type heating furnace on one side extends, and the C-hook lifts sample 2 upwards and laterally above the bottom of the furnace 18, placing sample 2 on the furnace bottom. The furnace bottom 18 then retracts, and normalizing heating is performed. After normalizing heating, the furnace bottom 18 extends, and sample 2 is transferred from the C-hook to the input / output roller assembly on one side. Two actions are performed simultaneously: ① The bottom of the undercarriage-type heating furnace on one side retracts, and the furnace stops heating; ② The positive high-pressure section 19 and low-pressure section 21 of the roller quenching machine 9 are supplied with water by the water supply pipeline 22, and the water volume and pressure are controlled by the control valve assembly 23; the input / output roller assembly on one side... Sample 2 is transported to roller quencher 9 at the same process speed as roller quencher 9 for quenching and cooling; sample 2 passes through forward high pressure section 19, low pressure section 21 and reverse high pressure section 20 in sequence, and is transported out of roller quencher 9 by input / output roller conveyor group on the other side. At this time, reverse high pressure section 20 is not used; after cooling, sample 2 is transported to input / output roller conveyor group on the other side at the same process speed as roller quencher 9; while sample 2 is moving on input / output roller conveyor group on the other side, two actions are performed: ① the bottom of the bottom-type heating furnace 18 on the other side extends out, and the C-shaped hook on the other side waits at the end of input / output roller conveyor group on the other side; ② the water supply pipeline 22 of forward high pressure section 19 and low pressure section 21 of roller quencher 9 is closed by control valve group 23, and the upper row roller 25 and lower row roller 27 stop rotating.

[0020] When sample 2 moves above the C-hook on the other side, the input / output roller conveyor on the other side stops rotating; the sample 2 is lifted up and moved laterally to the top of the extended position of the car bottom 18, the C-hook on the other side places the sample 2 on the car bottom 18, the car bottom 18 is retracted, and the sample 2 is tempered and heated in the car bottom heating furnace on the other side; the sample 2 is transferred from the car bottom 18 of the car bottom heating furnace on the other side to the transport roller conveyor on the other side; the transport roller conveyor on the other side is used to realize the feeding of sample 2 and the swing cooling of sample 2 after tempering.

[0021] During the reverse heat treatment, the other side of the transport roller conveyor is used for loading, transporting, and positioning the sample 2. The other side transport roller conveyor transports the sample 2 to the position of the other side C-hook. At the same time, the bottom of the other side car bottom heating furnace 18 extends, and the other side C-hook lifts the sample 2 upward and laterally to the top of the extended bottom of the car bottom 18. The other side C-hook places the sample 2 on the bottom of the other side car bottom heating furnace 18, and the bottom of the car bottom 18 retracts. The sample 2 is then normalized in the other side car bottom heating furnace. After normalization in the other side car bottom heating furnace, the sample 2 is transferred by the other side C-hook to the other side input / output roller conveyor. After assembly, two actions are performed simultaneously: ① The bottom of the other side of the undercarriage heating furnace 18 is retracted, and the heating of the other side of the undercarriage heating furnace is stopped; ② The reverse high-pressure section 20 and low-pressure section 21 of the roller quenching machine 9 are supplied with water by the water supply pipeline 22, and the water volume and water pressure are controlled by the control valve group 23; The input / output roller conveyor group on the other side transports the sample 2 to the roller quenching machine 9 at the same process speed as the roller quenching machine 9 for quenching and cooling; The sample 2 passes through the reverse high-pressure section 20, low-pressure section 21 and forward high-pressure section 19 in sequence, and is transported out of the roller quenching machine 9 by the input / output roller conveyor group on one side. At this time, the forward high-pressure section 19 is not put into use;

[0022] After cooling, the sample 2 is transported to the input / output roller conveyor group on one side at the same process speed as the roller quenching machine 9. While the sample 2 is moving on the input / output roller conveyor group on one side, two actions are performed simultaneously: ① The bottom of the bottom-type heating furnace 18 on one side extends out, and the C-shaped hook on one side waits at the end of the input / output roller conveyor group on one side; ② The water supply pipeline 22 of the reverse high-pressure section 20 and low-pressure section 21 of the roller quenching machine 9 is closed by the control valve group 23, and the upper roller 25 and lower roller 27 stop rotating.

[0023] When sample 2 moves to above the C-hook on one side, the input / output roller conveyor on one side stops rotating. The C-hook on one side lifts sample 2 up and moves it laterally to above the bottom of the car bottom heating furnace 18 on one side. The C-hook on one side places sample 2 on the bottom of the car bottom heating furnace 18 on one side. The bottom of the car bottom 18 is retracted, and sample 2 is tempered and heated in the car bottom heating furnace on one side. Sample 2 is transferred from the bottom of the car bottom heating furnace 18 on one side to the transport roller conveyor on one side. The transport roller conveyor on one side is used to realize the feeding of sample 2 and the swing cooling of sample 2 after tempering.

[0024] The advantages and beneficial effects of this utility model are:

[0025] 1. This utility model adopts the production mode of industrialized large-scale heat treatment line for steel plates, omitting auxiliary structures unrelated to the heat treatment performance and surface quality of steel plates. It focuses solely on the impact of heat treatment process on the performance of steel plates, configuring each component proportionally to reduce and restore the industrial production process. This enables the originally complex and costly research and development process of new steel grades, new steel types, and new processes to be realized on a simple pilot-scale device, accelerating the research and development cycle, reducing research and development costs, and providing an effective experimental means for steel enterprises to develop heat-treated steel grades and upgrade processes.

[0026] 2. This utility model equipment is simple to operate and has complete functions. It can realize both forward and reverse heat treatment, organically combining the heat treatment furnace and the quenching machine. It facilitates the switching of multiple specifications, multiple steel grades, and complex heat treatment processes at any time, and can implement process flows that cannot be completed by conventional industrial large-scale production heat treatment lines, thus creating favorable conditions for the research and development of new heat treatment technologies.

[0027] 3. This utility model equipment has a high degree of automation and can achieve unmanned operation. On the one hand, it effectively reduces test energy consumption and waste discharge indicators, and on the other hand, it effectively reduces the risk of human operation. Researchers can complete the test process in a closed, safe environment with low noise and dust pollution and no high temperature, which is safe and reliable. Attached Figure Description

[0028] Figure 1 This is a plan view of the pilot-scale heat treatment device for steel plates in this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the roller quenching machine in this utility model.

[0030] In the diagram, 1 is the pilot heat treatment device for steel plates; 2 is the sample; 3 is the cantilever crane I; 4 is the conveyor roller group I; 5 is the centering mechanism I; 6 is the C-type hook I; 7 is the undercarriage heating furnace I; 8 is the input / output roller group I; 9 is the roller quenching machine; 10 is the input / output roller group II; 11 is the undercarriage heating furnace II; 12 is the C-type hook II; 13 is the centering mechanism II; 14 is the conveyor roller group II; 15 is the cantilever crane II; 16 is the roller conveyor and its support; 17 is the cylinder clamping mechanism; 18 is the undercarriage; 19 is the forward high-pressure section; 20 is the reverse high-pressure section; 21 is the low-pressure section; 22 is the water supply pipeline; 23 is the control valve group; 24 is the moving frame; 25 is the upper roller; 26 is the transmission system; and 27 is the lower roller. Detailed Implementation

[0031] like Figure 1The present invention proposes a pilot-scale heat treatment device for steel plates, comprising a cantilever crane I3, a transport roller conveyor group I4, a centering mechanism I5, a C-hook I6, a car-bottom heating furnace I7, an input / output roller conveyor group I8, a roller quenching machine 9, an input / output roller conveyor group II10, a car-bottom heating furnace II11, a C-hook II12, a centering mechanism II13, a transport roller conveyor group II14, and a cantilever crane II15. Centered on the roller quenching machine 9, the mechanisms on both sides are functionally identical and symmetrically arranged to achieve the following functions: forward sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading; and reverse sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading. It can continuously and automatically perform sample loading, centering, transfer, normalizing heating, quenching, tempering heating, and slow cooling. Specifically:

[0032] The cantilever cranes I3 and II15 are respectively installed at both ends of the steel plate heat treatment pilot device 1, and are used for hoisting the sample 2 for loading or unloading, as well as for the maintenance of the mechanical parts of the device.

[0033] The transport roller assembly I4 and transport roller assembly II14 are symmetrically arranged at the outermost ends of both sides of the steel plate heat treatment pilot device 1. Each assembly consists of multiple rollers and supports 16, employing a centralized chain drive system with a roller speed range of 1–10 m / min. During forward heat treatment, transport roller assembly I4 is used for loading, transporting, and positioning the sample 2, while transport roller assembly II14 is used for unloading the sample 2 and for oscillating cooling of the sample 2 after tempering. During reverse quenching, transport roller assembly II14 is used for loading, transporting, and positioning the sample 2, while transport roller assembly I4 is used for unloading the sample 2 and for oscillating cooling of the sample 2 after tempering.

[0034] The centering mechanism I5 and centering mechanism II13 are respectively installed on the transport roller group I4 and the transport roller group II14, and a cylinder clamping mechanism is used to realize the centering of the sample 2 on the transport roller group I4 or the transport roller group II14.

[0035] The C-type hook I6 is used to lift sample 2. During forward heat treatment, sample 2 is transferred from transport roller group I4 to the undercarriage of the undercarriage-type heating furnace I7 (undercarriage bottom 18), and then from the undercarriage of ... For hoisting sample 2, during reverse heat treatment, sample 2 is transferred from transport roller group II14 to the bottom of the undercarriage furnace II11, and then from the bottom of the undercarriage furnace II11, to the input / output roller group II10. During forward heat treatment, sample 2 is transferred from the input / output roller group II10 to the bottom of the undercarriage furnace II11, and then from the bottom of the undercarriage furnace II11, to the transport roller group II14. The lifting mechanisms of C-hooks I6 and II12 are electric cylinder lifting methods, controlled by a servo control system. The lateral movement mechanisms of C-hooks I6 and II12 are driven by a servo control system, enabling accurate and rapid lateral movement of sample 2.

[0036] The undercarriage heating furnaces I7 and II11 are arranged on one side of the pilot plant 1. The undercarriage 18 is retractable and is used to receive the sample 2 for heating or to lift out the heated sample 2. Both undercarriage heating furnaces I7 and II11 are dual-purpose furnaces for normalizing and tempering, with a maximum operating furnace temperature of 1200℃. The heating rate and holding time are automatically adjustable. The retraction of the undercarriage 18 and the opening and closing of the furnace door are interlocked with the lifting or moving of C-hook I6 and C-hook II12 to achieve automatic loading and unloading of sample 2. During positive heat treatment, undercarriage heating furnace I7 performs the normalizing heating function, and undercarriage heating furnace II11 performs the tempering heating function. During reverse heat treatment, undercarriage heating furnace II11 performs the normalizing heating function, and undercarriage heating furnace I7 performs the tempering heating function.

[0037] The input / output roller conveyor group I8 and input / output roller conveyor group II10 are used to connect the undercarriage heating furnace I7 or the undercarriage heating furnace II11 to the roller quenching machine 9, receiving and transferring the heated or quenched sample 2. The roller speed range is 1 to 40 m / min. During normal heat treatment, the sample 2 after normalizing in the undercarriage heating furnace I7 is transferred to the input / output roller conveyor group I8 by the C-hook I6. The input / output roller conveyor group I8 transports the sample 2 to the roller quenching machine 9 at the same process speed as the roller quenching machine 9 for quenching and cooling. After cooling, the sample 2 is transported to the input / output roller conveyor group II10 at the same process speed as the roller quenching machine 9, and transferred to the undercarriage heating furnace II11 for tempering and heating by the C-hook II12. During reverse heat treatment, after the sample 2 is normalized by the undercarriage furnace II11, it is transferred by the C-hook II12 to the input / output roller conveyor group II10. The input / output roller conveyor group II10 transports the sample 2 to the roller quencher 9 at the same process speed as the roller quencher 9 for quenching and cooling. After cooling, the sample 2 is transported to the input / output roller conveyor group I8 at the same process speed as the roller quencher 9, and then transferred by the C-hook I6 to the undercarriage furnace I7 for tempering and heating.

[0038] like Figure 2 As shown, the roller quenching machine 9 consists of a forward high-pressure section 19, a reverse high-pressure section 20, and a low-pressure section 21. The water supply pressure of both the forward high-pressure section 19 and the reverse high-pressure section 20 is 10 bar, and the maximum water supply flow rate is 1000 m³ / s. 3 / h, low-pressure section 21 water supply pressure 3-6 bar, maximum water supply 800m³ / h. 3 / h. The flow rate of each nozzle is controlled by the control valve group 23 on each branch water supply pipeline 22; the roller gap of the roller quenching machine 9 is controlled by the lifting and lowering of the moving frame 24 and the upper roller 25, with the roller gap adjustment range of 0-400mm; the upper roller 25 and lower roller 27 of the roller quenching machine 9 are driven to rotate by the transmission system 26 to transfer the sample 2 to the designated position, with the roller table linear speed range of 1-40m / min for the upper roller 25 and lower roller 27. During positive heat treatment, after the sample 2 is transferred to the input / output roller table group I8, the input / output roller table group I8 transports the sample 2 into the roller quenching machine 9, passing through the positive high pressure section 19, the low pressure section 21 and the reverse high pressure section 20 in sequence, and is then transported out of the roller quenching machine 9 by the input / output roller table group II10. At this time, the reverse high pressure section 20 is not in use. During reverse heat treatment, after sample 2 is transferred to the input / output roller conveyor group II10, the input / output roller conveyor group II10 transports sample 2 into the roller quenching machine 9, and sequentially passes through the reverse high pressure section 20, the low pressure section 21 and the forward high pressure section 19, and is then transported out of the roller quenching machine 9 by the input / output roller conveyor group I8. At this time, the forward high pressure section 19 is not put into use.

[0039] Taking a 50mm thick, 500mm wide, and 700mm long high-strength structural steel plate (Q960) as an example, combined with the attached... Figure 1-2 This describes a specific implementation method of a pilot-scale heat treatment device for steel plates, specifically for forward heat treatment. In the initial state, C-hook I6 is positioned at the loading position of the transport roller assembly I4 and is in a descending state. The temperature of the undercarriage heating furnace I7 rises to 920°C, the undercarriage 18 retracts, and the moving frame 24 of the roller quenching machine 9 moves to adjust the position of the upper roller 25, making the roller gap between the upper roller 25 and the lower roller 27 55mm. C-hook II12 is positioned at the receiving position of the input / output roller assembly II10 and is in a descending state. The temperature of the undercarriage heating furnace II11 rises to 600°C, and the undercarriage 18 retracts.

[0040] When the heat treatment test begins, sample 2 is hoisted by cantilever crane I3 and placed on transport roller assembly I4. The cylinder clamping mechanism 17 drives the centering mechanism I5 to center sample 2 on transport roller assembly I4. Then, transport roller assembly I4 transports sample 2 to the position of C-hook I6 at a roller speed of 3m / min. At the same time, the bottom of the undercarriage furnace I7 extends out, and C-hook I6 lifts sample 2 up by 200mm and then moves laterally to the position above the bottom of the undercarriage furnace I7. C-hook I6 then descends by 200mm and places sample 2 on the bottom of the undercarriage furnace I7. The bottom of the undercarriage furnace I7 is then retracted, and sample 2 is normalized and heated inside the undercarriage furnace I7.

[0041] After sample 2 is heated in the undercarriage heating furnace I7 for 105 minutes, the undercarriage 18 extends, and the C-hook I6 lifts sample 2 up 200 mm and then moves it laterally above the input / output roller conveyor group I8. The C-hook I6 then descends 200 mm and places sample 2 on the input / output roller conveyor group I8. At the same time, the steel plate heat treatment pilot plant 1 performs two actions: ① The undercarriage 18 of the undercarriage heating furnace I7 retracts, and the undercarriage heating furnace I7 stops heating; ② The positive high-pressure section 19 of the roller quenching machine 9 is supplied with water by the water supply pipeline 22, and the water volume is controlled by the control valve group 23 to be 900 m³. 3 The water pressure is 10 bar / h. The low-pressure section 21 of the roller quenching machine 9 is supplied with water by the branch water supply pipeline 22, and the water flow is controlled by the control valve group 23 to be 700 m³ / h. 3 / h. Afterwards, sample 2, carried by input / output roller conveyor group I8, enters the roller quenching machine 9 at a speed of 3 m / min. It is carried by the lower roller 27 of the roller quenching machine 9, passing sequentially through the forward high-pressure section 19, the low-pressure section 21, and the closed reverse high-pressure section 20, before being transported to the corresponding position of the C-hook II12 on the input / output roller conveyor group II10. While sample 2 moves on the input / output roller conveyor group II10, the steel plate heat treatment pilot plant 1 simultaneously performs two actions: ① the bottom of the undercarriage furnace II11 extends out, and the C-hook II12 waits below the end of the input / output roller conveyor group II10; ② the water supply lines 22 of the forward high-pressure section 19 and low-pressure section 21 of the roller quenching machine 9 are closed by the control valve group 23, and the upper roller 25 and lower roller 27 of the roller quenching machine stop rotating.

[0042] When sample 2 moves above C-hook II12, input / output roller group II10 stops rotating. C-hook II12 lifts sample 2 up 200mm and then moves laterally to the bottom of the undercarriage of undercarriage furnace II11 at the extended position. C-hook II12 then descends 200mm and places sample 2 on the bottom of undercarriage furnace II11. The bottom of undercarriage furnace II11 is then retracted, and sample 2 is tempered and heated inside undercarriage furnace II11.

[0043] After sample 2 is heated for 160 minutes in the undercarriage-type heating furnace II11, the undercarriage 18 extends, and the C-hook II12 lifts sample 2 up 200 mm, then moves it laterally above the transport roller assembly II14. The C-hook II12 then lowers 200 mm, placing sample 2 on the transport roller assembly II14. The transport roller assembly II14 rotates in both directions at a speed of 3 m / min, carrying sample 2 in a swinging motion. Simultaneously, the undercarriage 18 of the undercarriage-type heating furnace II11 retracts, and the furnace stops heating. Sample 2 swings on the transport roller assembly II14 until the temperature drops below 100℃, at which point it is lifted by the cantilever crane II15 and placed in the designated position. Thus, the forward heat treatment of the 500 mm wide and 700 mm long high-strength structural steel plate Q960 is completed.

[0044] Similarly, taking Q960 high-strength structural steel plate with a thickness of 50mm, a width of 500mm, and a length of 700mm as an example, combined with the attached... Figure 1-2 This describes a specific implementation of a reverse heat treatment method for a pilot-scale heat treatment device for steel plates. Initially, C-hook II12 is positioned at the loading position of transport roller assembly II14 and is in a descending state. The temperature of the undercarriage heating furnace II11 rises to 920°C, the undercarriage 18 retracts, and the moving frame 24 of the roller quenching machine 9 moves to adjust the position of the upper rollers 25, making the gap between the upper rollers 25 and the lower rollers 27 55mm. C-hook I6 is positioned at the receiving position of input / output roller assembly I8 and is in a descending state. The temperature of the undercarriage heating furnace I7 rises to 600°C, and the undercarriage 18 retracts.

[0045] When the heat treatment test begins, sample 2 is hoisted by cantilever crane II15 and placed on transport roller assembly II14. The cylinder clamping mechanism 17 drives the centering mechanism II13 to center sample 2 on transport roller assembly II14. Then, transport roller assembly II14 transports sample 2 to the position of C-hook II12 at a roller speed of 3m / min. At the same time, the bottom of the undercarriage furnace II11 extends outward. C-hook II12 lifts sample 2 up by 200mm and then moves laterally to the position above the bottom of the undercarriage furnace II11 in the extended position. C-hook II12 then descends by 200mm and places sample 2 on the bottom of the undercarriage furnace II11. The bottom of the undercarriage furnace II11 is then retracted, and sample 2 is normalized and heated inside the undercarriage furnace II11.

[0046] After sample 2 is heated in the undercarriage heating furnace II11 for 105 minutes, the undercarriage 18 extends, and the C-hook II12 lifts sample 2 up 200 mm and then moves it horizontally above the input / output roller conveyor group II10. The C-hook II12 then descends 200 mm and places sample 2 on the input / output roller conveyor group II10. At the same time, the steel plate heat treatment pilot plant 1 performs two actions: ① The undercarriage 18 of the undercarriage heating furnace II11 retracts, and the undercarriage heating furnace II11 stops heating; ② The reverse high-pressure section 20 of the roller quenching machine 9 is supplied with water by the water supply pipeline 22, and the water volume is controlled by the control valve group 23 to be 900 m³. 3 The water pressure is 10 bar / h. The low-pressure section 21 of the roller quenching machine 9 is supplied with water by the branch water supply pipeline 22, and the water flow is controlled by the control valve group 23 to be 700 m³ / h. 3 / h. Afterwards, sample 2, carried by the input / output roller conveyor group II10, enters the roller quenching machine 9 at a speed of 3 m / min. It is carried by the lower roller 27 of the roller quenching machine 9 and passes sequentially through the reverse high-pressure section 20, the low-pressure section 21, and the closed forward high-pressure section 19, before being transported to the corresponding position of the C-hook I6 on the input / output roller conveyor group I8. While sample 2 moves on the input / output roller conveyor group I8, the steel plate heat treatment pilot plant 1 simultaneously performs two actions: ① the bottom of the undercarriage furnace I7 extends out, and the C-hook I6 waits at the end of the input / output roller conveyor group I8; ② the water supply lines 22 of the reverse high-pressure section 20 and low-pressure section 21 of the roller quenching machine 9 are closed by the control valve group 23, and the upper roller 25 and lower roller 27 of the roller quenching machine stop rotating.

[0047] When sample 2 moves above C-hook I6, input / output roller conveyor I8 stops rotating. C-hook I6 lifts sample 2 up by 200mm and then moves laterally to the bottom of the undercarriage of the undercarriage furnace I7 above the extended position. C-hook I6 then descends by 200mm and places sample 2 on the bottom of the undercarriage furnace I7. The bottom of the undercarriage furnace I7 is then retracted, and sample 2 is tempered and heated inside the undercarriage furnace I7.

[0048] After sample 2 is heated in the undercarriage-type heating furnace I7 for 160 minutes, the undercarriage 18 extends, and the C-hook I6 lifts sample 2 up 200 mm, then moves it laterally above the transport roller assembly I4. The C-hook I6 then lowers 200 mm, placing sample 2 on the transport roller assembly I4. The transport roller assembly I4 rotates in both directions at a speed of 3 m / min, carrying sample 2 in a swinging motion. Simultaneously, the undercarriage 18 of the undercarriage-type heating furnace I7 retracts, and the furnace stops heating. Sample 2 swings on the transport roller assembly I4 until its temperature drops below 100℃, at which point it is lifted by the cantilever crane I3 and placed in the designated position. This completes the reverse heat treatment of the 500 mm wide and 700 mm long high-strength structural steel plate Q960.

Claims

1. A pilot-scale apparatus for heat treatment of steel plates, characterized in that, The pilot heat treatment device (1) for steel plates is centered on a roller quenching machine (9), with the mechanisms on both sides having the same function and arranged symmetrically. The mechanisms on both sides include a cantilever crane, a transport roller conveyor group, a centering mechanism, a C-hook, a car bottom heating furnace, and an input / output roller conveyor group. The roller quenching machine (9), the input / output roller conveyor group, the car bottom heating furnace, and the transport roller conveyor group are arranged in sequence. The centering mechanism is arranged on the transport roller conveyor group. The cantilever crane is used to lift the sample (2). The C-hook is used to transport the sample (2).

2. The pilot-scale apparatus for heat treatment of steel plates according to claim 1, characterized in that, The transport roller sets are symmetrically arranged on both sides of the outermost end of the steel plate heat treatment pilot device (1). They are mainly composed of multiple rollers and supports (16), and adopt a centralized chain drive method with a roller speed range of 1 to 10 m / min.

3. The pilot-scale apparatus for heat treatment of steel plates according to claim 1, characterized in that, The centering mechanism employs cylinder clamping mechanisms (17) on both sides for centering the sample (2) on the transport roller assembly.

4. The pilot-scale apparatus for heat treatment of steel plates according to claim 1, characterized in that, The undercarriage heating furnace is arranged on one side of the steel plate heat treatment pilot device (1). The undercarriage (18) is retractable and is used to support the heated sample (2) or to lift out the heated sample (2). The undercarriage heating furnace is a normalizing / tempering furnace with a maximum working furnace temperature of 1200℃. The heating rate and holding time can be automatically adjusted. The retraction of the undercarriage (18), the opening and closing of the furnace door and the lifting or moving of the C-shaped hook are interlocked to automatically load and unload the sample (2).

5. A pilot-scale apparatus for heat treatment of steel plates according to claim 1, characterized in that, The lifting mechanism of the C-hook uses an electric cylinder for lifting, and the lifting is controlled by a servo control system; the lateral movement mechanism of the C-hook is driven by a servo control system.

6. A pilot-scale apparatus for heat treatment of steel plates according to claim 1, characterized in that, The input / output roller conveyor group is used to connect the undercarriage heating furnace and the roller quenching machine (9), to receive and transfer the heated or quenched sample (2), and the roller speed range is 1 to 40 m / min.

7. A pilot-scale apparatus for heat treatment of steel plates according to any one of claims 1-6, characterized in that, The roller quenching machine (9) mainly consists of a forward high-pressure section (19), a reverse high-pressure section (20), and a low-pressure section (21). The water supply pressure of both the forward high-pressure section (19) and the reverse high-pressure section (20) is 10 bar, and the maximum water supply flow rate is 1000 m³ / s. 3 / h, low-pressure section (21) water supply pressure 3~6 bar, maximum water supply 800m 3 / h; The flow rate of each nozzle is controlled by the control valve group (23) on each branch water supply pipeline (22); The upper roller (25) of the roller quenching machine (9) is connected to the moving frame (24), and the moving frame (24) is controlled to lift and drive the upper roller (25), and the roller gap of the roller quenching machine (9) is controlled, with the roller gap adjustment range of 0 to 400 mm; The transmission system (26) is connected to the upper roller (25) and the lower roller (27) respectively to drive them to rotate and transfer the sample (2) to the designated position; The linear speed range of the upper roller (25) and the lower roller (27) is 1 to 40 m / min.

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