Strip steel fine pearlite quenching device

Abstract

This invention discloses a quenching device for fine pearlite in strip steel, comprising a device body, a feed roller, a discharge roller, a heating chamber, a front heat preservation chamber, a cooling chamber, and a rear heat preservation chamber. The feed roller and discharge roller are respectively disposed at the feed and discharge ends of the device body. The heating chamber, front heat preservation chamber, cooling chamber, and rear heat preservation chamber are sequentially installed in the device body from the feed end to the discharge end. An upper quenching mechanism and a lower quenching mechanism are installed in the cooling chamber. The upper quenching mechanism is installed above the strip steel through which the strip steel passes, and the lower quenching mechanism is installed below the strip steel through which the strip steel passes. A liquid storage chamber for storing coolant is provided below the cooling chamber. The upper and lower quenching mechanisms transport the coolant in the liquid storage chamber to the upper and lower surfaces of the strip steel for cooling. By setting up the upper and lower quenching mechanisms, this invention can adjust the amount of coolant according to the width and thickness of the strip steel to be quenched, thereby enabling the quenched strip steel to reach a preset temperature and ensuring the formation of fine pearlite in the strip steel.

Description

Technical Field

[0001] This invention relates to the field of automotive engine parts technology, and in particular to a strip steel fine pearlitic quenching device. Background Technology

[0002] Strip steel is a narrow and long steel plate produced by various steel rolling enterprises to meet the needs of industrialized production of various metal or mechanical products in different industrial sectors. Strip steel, also known as steel strip, has different production processes depending on its application. For example, strip steel with a fine pearlite (granular pearlite) structure can improve its toughness and plasticity. Fine pearlite is generally formed using two processing techniques: spheroidizing annealing or quenching and tempering. The quenching and tempering process includes quenching and high-temperature tempering. During quenching, the strip steel cannot be directly quenched from its austenitic state to room temperature because it is easy to quench through during the quenching process, causing the pearlite inside the strip to become lamellar, thus failing to meet mechanical requirements. Instead, it should be quenched to over 100 degrees Celsius and then slowly cooled to better preserve the integrity of the internal fine pearlite structure. Existing quenching equipment makes it difficult to control the temperature of the workpiece after quenching to over 100 degrees Celsius. To address these problems, this invention provides a solution. Summary of the Invention

[0003] The purpose of this invention is to provide a device for quenching fine pearlitic steel strips.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0005] A strip steel fine pearlite quenching device includes a device body, a feed roller, a discharge roller, a heating chamber, a front heat preservation chamber, a cooling chamber, and a rear heat preservation chamber. The feed roller and discharge roller are respectively disposed at the feed and discharge ends of the device body. The heating chamber, the front heat preservation chamber, the cooling chamber, and the rear heat preservation chamber are sequentially installed in the device body from the feed end to the discharge end. An electric heating wire is installed in the heating chamber, an electric heating wire is installed in the front heat preservation chamber, and an electric heating wire is installed in the rear heat preservation chamber. An upper quenching mechanism and a lower quenching mechanism are installed in the cooling chamber. The upper quenching mechanism is installed above the strip steel through which the strip steel passes, and the lower quenching mechanism is installed below the strip steel through which the strip steel passes. A liquid storage chamber for storing coolant is provided below the cooling chamber. The upper quenching mechanism and the lower quenching mechanism transport the coolant in the liquid storage chamber to the upper and lower surfaces of the strip steel for cooling.

[0006] Furthermore, the upper quenching mechanism includes an outer cylinder, an inner cylinder, a stop block, a guide shaft, a sealing spring, a connecting hole, and a liquid outlet hole. The inner cylinder is coaxially installed inside the outer cylinder. The side wall of the outer cylinder is provided with several evenly distributed, tapered liquid outlet holes. The tapered stop block is inserted into the liquid outlet hole, with its head extending out of the liquid storage hole. The guide shaft is fixed to the tail of the stop block as a whole, and one end of the guide shaft is inserted into the telescopic hole of the inner cylinder. The sealing spring is fitted on the guide shaft between the inner and outer cylinders. The sealing spring pushes the stop block to fit and seal against the liquid outlet hole. When the strip steel passes by, it contacts the stop block, squeezing the stop block to retract, forming a gap between the stop block and the liquid outlet hole for coolant to flow out. One end of the outer cylinder is provided with a connecting shaft end connected to the motor drive, and the other end of the outer cylinder is provided with a liquid inlet connector. The liquid inlet connector is connected to the liquid pump and the liquid outlet chamber through a pipeline.

[0007] Furthermore, the lower quenching mechanism consists of multiple sets of spraying mechanisms arranged side by side. Each spraying mechanism includes a cooling nozzle, a pressure holding chamber, a valve stem, a linkage rod, a linkage chamber, a linkage plate, a pin, and a retaining spring. The cooling nozzle is positioned aligned with the bottom of the strip steel. The inner cavity of the cooling nozzle is connected to the flow hole, and the flow hole is connected to one side of the pressure holding chamber. One end of the valve stem is inserted into the flow hole. When the valve stem is inserted to the top of the flow hole, it separates the inner cavity of the cooling nozzle from the pressure holding chamber. The other end of the valve stem is fixedly connected to one side of the linkage plate in the linkage chamber. The linkage rod... The linkage rod is fixedly connected to the other side of the linkage plate. The upper end of the linkage rod passes through the device body above the linkage cavity and abuts against the bottom of the strip steel. The pin is set at the bottom of the linkage plate, and the lower end of the pin is inserted into the insertion hole at the bottom of the linkage cavity. A retaining spring is fitted in the middle section of the pin. The pressure holding cavity is connected to the outlet of the liquid pump through a pipeline. The inlet of the liquid pump is connected to one end of the inlet pipe, and the other end of the inlet pipe extends into the bottom of the outlet cavity. An overflow valve is provided on the pipeline between the liquid pump and the pressure holding cavity. The overflow port of the overflow valve is connected to the storage cavity through a return pipe.

[0008] Furthermore, the bottom side wall of the liquid storage chamber is provided with a liquid exchange port, through which coolant is added or released.

[0009] Furthermore, the valve stem has a "convex" shaped cross-section, which is inserted into a flow hole of the same structure, and a sealing strip is provided on the outside of the valve stem to seal the flow hole.

[0010] Furthermore, a roller is provided at the end of the linkage rod that contacts the steel belt.

[0011] Furthermore, the device body located on the front side of the linkage rod and below the steel strip is provided with an inclined oil guide slope.

[0012] Furthermore, a filter cover is installed at the bottom end of the liquid inlet pipe, and the filter cover is provided with evenly distributed filter holes.

[0013] Furthermore, temperature sensors are provided in the heating chamber, the front insulation chamber, the cooling chamber, and the rear insulation chamber.

[0014] In summary, the present invention has the following beneficial effects: by setting up an upper quenching mechanism and a lower quenching mechanism, the present invention can adjust the amount of coolant according to the width and thickness of the strip steel to be quenched, so that the quenched strip steel reaches the preset temperature and ensures the formation of fine pearlite in the strip steel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the upper quenching mechanism;

[0017] Figure 3 This is a schematic diagram of the upper quenching mechanism;

[0018] Figure 4 This is a schematic diagram of the lower quenching mechanism.

[0019] Figure 5 This is a partial sectional view of the lower quenching mechanism.

[0020] In the diagram, 1. Device body; 2. Feed roller; 3. Discharge roller; 4. Heating chamber; 5. Front insulation chamber; 6. Rear insulation chamber; 7. Electric heating wire one; 8. Electric heating wire two; 9. Electric heating wire three; 10. Upper quenching mechanism; 11. Lower quenching mechanism; 12. Liquid storage chamber; 13. Liquid pump; 14. Overflow valve; 15. Liquid inlet pipe; 16. Filter cover; 17. Liquid changing port; 18. Strip steel; 19. Outer cylinder; 2 0. Inner cylinder; 21. Abutment block; 22. Guide shaft; 23. Sealing spring; 24. Connecting hole; 25. Liquid outlet hole; 26. Connecting shaft end; 27. Liquid inlet connector; 28. Cooling nozzle; 29. ​​Pressure holding chamber; 30. Valve stem; 31. Linkage rod; 32. Linkage chamber; 33. Linkage plate; 34. Pin rod; 35. Clamping spring; 36. Sealing strip; 37. Roller; 38. Oil guide slope; 39. Return pipe. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1-5As shown, a quenching device for fine pearlitic steel strip includes a device body 1, a feed roller 2, a discharge roller 3, a heating chamber 4, a front heat preservation chamber 5, a cooling chamber, and a rear heat preservation chamber 6. The feed roller 2 and the discharge roller 3 are respectively disposed at the feed and discharge ends of the device body 1. The heating chamber 4, the front heat preservation chamber 5, the cooling chamber, and the rear heat preservation chamber 6 are sequentially installed in the device body 1 from the feed end to the discharge end. An electric heating wire 7 is installed in the heating chamber 4, and an electric heating element is installed in the front heat preservation chamber 5. Wire 2 8, an electric heating wire 3 9 is installed in the rear heat preservation cavity 6, an upper quenching mechanism 10 and a lower quenching mechanism 11 are installed in the cooling cavity, the upper quenching mechanism 10 is installed above the passing strip 18, and the lower quenching mechanism 11 is installed below the passing strip 18, and a liquid storage cavity 12 for storing coolant is provided below the cooling cavity, the upper quenching mechanism 10 and the lower quenching mechanism 11 transport the coolant in the liquid storage cavity 12 to the upper and lower surfaces of the strip 18 for cooling.

[0023] Furthermore, such as Figure 2 and Figure 3 As shown, the upper quenching mechanism 10 includes an outer cylinder 19, an inner cylinder 20, a stop block 21, a guide shaft 22, a sealing spring 23, a connecting hole 24, and a liquid outlet hole 25. The inner cylinder 20 is coaxially installed inside the outer cylinder 19. The side wall of the outer cylinder 19 is provided with several evenly distributed conical liquid outlet holes 25. The conical stop block 21 is inserted into the liquid outlet hole 25, with its head extending out of the liquid storage hole 25. The guide shaft 22 is fixed to the tail of the stop block 21 as a whole, and one end of the guide shaft 22 is inserted into the inner cylinder 20. Inside the telescopic hole, the sealing spring 23 is fitted on the guide shaft 22 between the inner cylinder 20 and the outer cylinder 19. The sealing spring 23 pushes the abutment 21 to fit and seal with the liquid outlet 25. When the strip steel 18 passes by, it abuts against the abutment 21, squeezing the abutment 21 to retract, forming a gap between it and the liquid outlet 25 for coolant to flow out. One end of the outer cylinder 19 is provided with a connecting shaft end 26 connected to the motor drive, and the other end of the outer cylinder 19 is provided with a liquid inlet connector 27. The liquid inlet connector 27 is connected to the liquid pump and the liquid outlet chamber 12 through a pipeline.

[0024] Furthermore, such as Figure 4 and Figure 5As shown, the lower quenching mechanism 11 consists of multiple sets of spraying mechanisms arranged side by side. Each set of spraying mechanisms includes a cooling nozzle 28, a pressure holding chamber 29, a valve stem 30, a linkage rod 31, a linkage chamber 32, a linkage plate 33, a pin 34, and a retaining spring 35. The cooling nozzle 28 is positioned aligned with the bottom of the strip 18. The inner cavity of the cooling nozzle 28 is connected to the flow hole, and the flow hole is connected to one side of the pressure holding chamber 29. One end of the valve stem 30 is inserted into the flow hole. When the valve stem 30 is inserted to the top of the flow hole, it separates the inner cavity of the cooling nozzle 28 from the pressure holding chamber 29. The other end of the valve stem 30 is fixedly connected to one side of the linkage plate 33 in the linkage chamber 32. The linkage rod 31 is connected to the linkage plate 33 in the linkage chamber 32. The other side of the moving plate 33 is fixedly connected. The upper end of the linkage rod 31 passes through the device body 1 above the linkage cavity 32 and abuts against the bottom of the strip steel 18. The pin 34 is set at the bottom of the linkage plate 33. The lower end of the pin 34 is inserted into the insertion hole at the bottom of the linkage cavity 32. The middle section of the pin 34 is fitted with a retaining spring 35. The pressure holding cavity 29 is connected to the outlet of the liquid pump 13 through a pipeline. The inlet of the liquid pump 13 is connected to one end of the inlet pipe 15. The other end of the inlet pipe 15 extends into the bottom of the outlet cavity 12. An overflow valve 14 is provided on the pipeline between the liquid pump 13 and the pressure holding cavity 29. The overflow port of the overflow valve 14 is connected to the storage cavity 12 through the return pipe 39.

[0025] Furthermore, the bottom side wall of the liquid storage chamber 12 is provided with a liquid exchange port 17, through which coolant is added or released.

[0026] Furthermore, the valve stem 30 has a "convex" shaped cross-section and is inserted into a flow hole of the same structure. The valve stem 30 is provided with a sealing strip 36 for sealing the flow hole. Similarly, the valve stem 30 can be a cylindrical structure with a diameter larger than the inner diameter of the cooling nozzle 28. The inner hole of the cooling nozzle 28 is tangent to the flow hole.

[0027] Furthermore, a roller 37 is provided at the end of the linkage rod 31 that contacts the steel strip 18. The roller 37 can reduce the friction between the linkage rod 31 and the steel strip 18.

[0028] Furthermore, an inclined oil guide slope 38 is provided on the device body 1 on the front side of the linkage rod 31 and below the steel strip 18. The setting of the oil guide slope 38 reduces the amount of coolant entering the heating chamber 4.

[0029] Furthermore, a filter cover 16 is installed at the bottom end of the liquid inlet pipe 15. The filter cover 16 has evenly distributed filter holes and filters impurities in the coolant.

[0030] Furthermore, temperature sensors are provided in the heating chamber 4, the front insulation chamber 5, the cooling chamber and the rear insulation chamber 6. The temperature sensors can monitor the temperature of the strip 18 to ensure the process temperature of the strip.

[0031] Working principle: The strip steel 18 is fed through the feed roller 2 and enters the heating chamber 4 for heating. Then it enters the front heat preservation chamber 5 for heat preservation, so that it reaches the preset process temperature. When the strip steel 18 enters the cooling chamber, the width and thickness of the quenched strip steel will cause the opening degree and area of ​​the block 21 of the upper quenching mechanism 10 and the linkage rod 31 of the lower quenching mechanism 11 to be different, so that the corresponding amount of coolant is sprayed on the upper and lower surfaces of the strip steel 18 (different thicknesses require different amounts of cooling liquid), so that the quenched strip steel 18 reaches the predetermined temperature. After quenching and cooling, the strip steel 18 enters the rear heat preservation chamber 6 for slow cooling, ensuring the formation of fine pearlite in the strip steel. This invention can perform quantitative cooling according to the width and thickness of the steel strip to reach the process temperature.

[0032] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A ferrite quenching device for a strip steel, characterized by: The device includes a main body (1), a feed roller (2), a discharge roller (3), a heating chamber (4), a front insulation chamber (5), a cooling chamber, and a rear insulation chamber (6). The feed roller (2) and the discharge roller (3) are respectively located at the feed and discharge ends of the main body (1). The heating chamber (4), the front insulation chamber (5), the cooling chamber, and the rear insulation chamber (6) are installed sequentially in the main body (1) from the feed end to the discharge end. An electric heating wire 1 (7) is installed in the heating chamber (4), an electric heating wire 2 (8) is installed in the front insulation chamber (5), and an electric heating wire 3 (8) is installed in the rear insulation chamber (6). The electric heating wire is three (9). The cooling chamber is equipped with an upper quenching mechanism (10) and a lower quenching mechanism (11). The upper quenching mechanism (10) is installed above the strip (18) through which the strip passes, and the lower quenching mechanism (11) is installed below the strip (18) through which the strip passes. A liquid storage chamber (12) for storing coolant is provided below the cooling chamber. The upper quenching mechanism (10) and the lower quenching mechanism (11) transport the coolant in the liquid storage chamber (12) to the upper and lower surfaces of the strip (18) for cooling. The upper quenching mechanism (10) includes an outer cylinder (19) and an inner cylinder (20). The inner cylinder (20) is coaxially installed inside the outer cylinder (19). The outer cylinder (19) has several evenly distributed, cone-shaped liquid outlet holes (25) on its sidewall. A conical block (21) is inserted into the liquid outlet hole (25), with the head of the block (21) extending out of the hole. The guide shaft (22) is fixed to the tail of the block (21). One end of the guide shaft (22) is inserted into the telescopic hole of the inner cylinder (20). The sealing spring (23)... 23) The guide shaft (22) is fitted between the inner cylinder (20) and the outer cylinder (19). The sealing spring (23) pushes the block (21) to fit and seal with the liquid outlet (25). When the strip steel (18) passes by, it abuts against the block (21), squeezing the block (21) to retract, forming a gap between it and the liquid outlet (25) for coolant to flow out. One end of the outer cylinder (19) is provided with a connecting shaft end (26) connected to the motor drive, and the other end of the outer cylinder (19) is provided with a liquid inlet connector (27). The liquid inlet connector (27) is connected to the liquid pump and the liquid storage chamber (12) through a pipeline.

2. The strip steel fine pearlite quenching apparatus according to claim 1, characterized by: The lower quenching mechanism (11) consists of multiple sets of spraying mechanisms arranged side by side. Each set of spraying mechanisms includes a cooling nozzle (28), a pressure holding chamber (29), a valve stem (30), a linkage rod (31), a linkage chamber (32), a linkage plate (33), a pin (34), and a clamping spring (35). The cooling nozzle (28) is positioned aligned with the bottom of the strip (18). The inner cavity of the cooling nozzle (28) is connected to the flow hole, and the flow hole is connected to one side of the pressure holding chamber (29). One end of the valve stem (30) is inserted into the flow hole. When the valve stem (30) is inserted to the top of the flow hole, it separates the inner cavity of the cooling nozzle (28) from the pressure holding chamber (29). The other end of the valve stem (30) is fixedly connected to one side of the linkage plate (33) in the linkage chamber (32). The linkage rod (31) and the linkage plate (35) are connected to each other. 3) The other side is fixedly connected, the upper end of the linkage rod (31) passes through the device body (1) above the linkage cavity (32) and abuts against the bottom of the strip steel (18), the pin (34) is set at the bottom of the linkage plate (33), the lower end of the pin (34) is inserted into the insertion hole at the bottom of the linkage cavity (32), the middle section of the pin (34) is fitted with a clamping spring (35), the pressure holding cavity (29) is connected to the outlet of the liquid pump (13) through the pipeline, the inlet of the liquid pump (13) is connected to one end of the inlet pipe (15), the other end of the inlet pipe (15) extends into the bottom of the storage cavity (12), the pipeline between the liquid pump (13) and the pressure holding cavity (29) is provided with an overflow valve (14), the overflow port of the overflow valve (14) is connected to the storage cavity (12) through the return pipe (39).

3. The strip steel fine pearlite quenching apparatus according to claim 2, characterized by: The bottom side wall of the liquid storage chamber (12) is provided with a liquid exchange port (17) through which coolant is added or released.

4. The strip steel fine pearlite quenching apparatus according to claim 3, characterized by: The valve stem (30) has a "convex" shaped cross section and is inserted into a flow hole with the same structure. The valve stem (30) is provided with a sealing strip (36) for sealing the flow hole.

5. The strip steel fine pearlite quenching apparatus of claim 4, wherein: The end of the linkage rod (31) that contacts the strip steel (18) is provided with a roller (37).

6. The strip steel fine pearlite quenching apparatus of claim 5, wherein: An inclined oil guide slope (38) is provided on the device body (1) below the strip steel (18) on the front side of the linkage rod (31).

7. The strip steel fine pearlite quenching apparatus of claim 6, wherein: The bottom end of the liquid inlet pipe (15) is equipped with a filter cover (16), and the filter cover (16) is provided with evenly distributed filter holes.

8. The strip steel fine pearlite quenching apparatus of claim 1, wherein: Temperature sensors are provided in the heating chamber (4), the front insulation chamber (5), the cooling chamber, and the rear insulation chamber (6).

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