A graded cooling structure for high alloy die steel production

Abstract

The utility model relates to die steel cooling technical field discloses a kind of graded cooling structure for high alloy die steel production, comprising: water tank, the quantity of water tank is three, wherein two water tank's lateral wall are fixedly installed with first pump body, and the water outlet end of each first pump body is respectively connected with the inner cavity of corresponding water tank.The utility model in the linkage design of three water tanks and first pump body, realizes the closed loop circulation of cooling water, on the one hand, first pump body transports the cooling water of remaining water tank to its own water tank, in combination with the backwater design of cooling mechanism, avoid the resource waste caused by cooling water direct discharge, significantly reduce water resource consumption and water replenishment cost in production;On the other hand, the design that pump body water body delivery direction is contrary to workpiece cooling conveying path, so that workpiece always preferentially contact lower temperature cooling water, avoid workpiece and the sustained contact of cooling water that has been heated and warmed up, substantially improve cooling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold steel cooling technology, and in particular to a graded cooling structure for the production of high alloy mold steel. Background Technology

[0002] Currently, high-alloy mold steels, due to their high content of alloying elements such as Cr, Mo, and V, require precise cooling control of their microstructure (such as martensitic and bainitic transformations) after heat treatment to ensure key mechanical properties such as hardness, toughness, and wear resistance. The scientific nature of the cooling process directly determines the service life, processing accuracy, and subsequent forming stability of the mold steel. Therefore, efficient, energy-saving cooling structures that are adaptable to multiple process requirements have become one of the core technical requirements in the production of high-alloy mold steels.

[0003] The production of high-alloy mold steel involves multiple processes such as preheating, quenching, tempering, and aging. The requirements for cooling rate vary significantly between different processes (e.g., rapid cooling is required in the quenching stage to promote martensitic transformation, while slow cooling is required after tempering to release internal stress). However, existing cooling structures are mostly "single-mode" designs, which can only provide a fixed cooling intensity and lack a multi-stage cooling layout. They cannot adjust the water temperature according to the cooling requirements of different processes, resulting in a mismatch between the cooling process and the process requirements. This not only limits the improvement of mold steel product quality but may also prolong the production cycle due to improper cooling parameters.

[0004] To address these issues, we propose a graded cooling structure for the production of high-alloy mold steel, which can control the water temperature and cool mold steels with different requirements. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a graded cooling structure for the production of high alloy mold steel.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a graded cooling structure for the production of high alloy mold steel, comprising: three water tanks, wherein a first pump body is fixedly installed on the side wall of two of the water tanks, the outlet end of each first pump body is connected to the inner cavity of the corresponding water tank, and the inlet end of each first pump body is connected to the inner cavity of the other two sets of water tanks through a conduit; a cooling mechanism is provided at the top of the water tank, the cooling mechanism can cool the workpiece passing through it with cooling water, and the cooling water after use by the cooling mechanism flows back into the water tank; the water conveying direction of the pump body is opposite to the cooling conveying path of the workpiece.

[0007] Preferably, the cooling mechanism includes a cooling box disposed on top of the water tank, a spray chamber fixedly installed on top of the cooling box, a second pump body fixedly installed on one side of the bottom of the spray chamber, and a spray pipe connected to the bottom of the spray chamber. The spray pipe is disposed on top of the inner cavity of the cooling box, the water outlet of the second pump body is connected to the spray chamber, and the water inlet of the second pump body is connected to the corresponding water tank through a conduit.

[0008] Preferably, a plurality of nozzles are connected and installed on the side wall of the water spray pipe, and the plurality of nozzles of the water spray pipe are all facing the center of the corresponding cooling box.

[0009] Preferably, a support frame is fixedly installed in the middle of both sides of the cooling box, and the other side of the support frame is fixedly connected to the inner wall of the water tank.

[0010] Preferably, each cooling box has openings on both sides, and the two openings extend through the cooling box. Each cooling box has a through groove at the bottom, and a filter plate is provided at the top of each through groove to facilitate the passage of mold steel through the cooling box.

[0011] Preferably, each filter plate is fixedly connected to a handle on both sides of its top, and the filter plate is movably positioned at the top of the through groove, facilitating the installation and disassembly of the filter plate.

[0012] Preferably, it also includes a cooling mechanism, which includes a cooling cover connected to the bottom of the cooling box, a plurality of diversion pipes connected to the bottom of the cooling cover, a bracket fixedly installed on the side wall of the water tank, and a fan fixedly installed on the top of the bracket. The fan corresponds to the plurality of diversion pipes, and the plurality of diversion pipes are distributed at the bottom of the inner cavity of the water tank, which can cool the high temperature cooling water.

[0013] Preferably, a water inlet pipe is provided on the top of one side of the water tank, and the other end of the water inlet pipe is connected to a cooling water source. A drain pipe is installed at the bottom of the other side of the water tank, and the other end of the drain pipe is connected to a water storage tank for storing and cooling high-temperature cooling water.

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

[0015] This invention achieves closed-loop recycling of cooling water through the linkage design of three water tanks and the first pump body. On the one hand, the first pump body transports cooling water from the other water tanks to its own water tank. Combined with the return water design of the cooling mechanism, it avoids resource waste caused by direct discharge of cooling water, significantly reducing water consumption and replenishment costs in production. On the other hand, the design of the pump body's water delivery direction being opposite to the workpiece cooling transmission path ensures that the workpiece always has priority contact with the cooler cooling water, avoiding continuous contact between the workpiece and the already heated cooling water, greatly improving cooling efficiency. At the same time, it reduces internal stress concentration in the workpiece caused by uneven cooling speed, ensuring that the mechanical properties of high alloy mold steel meet the standards. In addition, the graded layout of the three water tanks reserves space for subsequent differentiated cooling, adapting to the cooling needs of multiple process stages of high alloy mold steel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a graded cooling structure for the production of high alloy mold steel proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of a cooling mechanism for a graded cooling structure used in the production of high alloy mold steel, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of a cooling mechanism for a graded cooling structure used in the production of high alloy mold steel, as proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of a filter plate structure for a graded cooling structure used in the production of high alloy mold steel, as proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of a mold steel conveying structure for a graded cooling structure used in the production of high alloy mold steel, as proposed in this utility model.

[0021] In the diagram: 1. Water tank; 11. First pump body; 12. Support frame; 13. Cooling box; 14. Bracket; 15. Fan; 16. Water inlet pipe; 17. Drain pipe; 2. Spray chamber; 21. Second pump body; 22. Spray pipe; 3. Through groove; 31. Filter plate; 32. Handle; 4. Cooling cover; 41. Diverter pipe; 42. Hanging conveyor device. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5A graded cooling structure for the production of high alloy mold steel includes: a water tank 1, the number of water tanks 1 is three, wherein a first pump body 11 is fixedly installed on the side wall of two water tanks 1, the water outlet of each first pump body 11 is connected to the inner cavity of the corresponding water tank 1, and the water inlet of each first pump body 11 is connected to the inner cavity of the other two sets of water tanks 1 through a conduit.

[0024] A cooling mechanism is installed at the top of the water tank 1. The cooling mechanism can cool the workpiece passing through it by cooling water, and the cooling water after the cooling mechanism is used flows back into the water tank 1.

[0025] The water conveying direction of the pump body is opposite to the cooling conveying path of the workpiece. A suspended conveying device 42 is installed through the three sets of cooling boxes 13. The suspended conveying device 42 includes a drive motor, two rotating rollers, a conveyor belt and hangers. The conveyor belt drive is installed on the outside of the two sets of rotating rollers. The drive output end of the drive motor is connected to the drive shaft, and the other end of the drive shaft is fixedly connected to a rotating shaft. Several hangers are fixedly installed on the conveyor belt.

[0026] After startup, the first pump body 11 draws cooling water from the other two water tanks 1 through a conduit and delivers it to the inner cavity of its own water tank 1 to provide a water source for the cooling mechanism. At the same time, the workpiece passes through the cooling mechanism of the three water tanks 1 in sequence along a preset conveying path, and the cooling water conveying direction of the first pump body 11 is opposite to the workpiece conveying direction. That is, when the workpiece enters the current water tank 1, the first pump body 11 has already delivered the low-temperature cooling water from the other water tanks 1 to the current water tank 1, so that the workpiece comes into priority contact with the low-temperature cooling water. After the cooling water is cooled by the cooling mechanism, it flows back to the inner cavity of the current water tank 1 due to gravity, forming a local circulation. The three water tanks 1 achieve closed-loop flow of cooling water in the overall system through the linkage of the first pump body 11, which meets the multi-stage continuous cooling requirements of the workpiece.

[0027] Furthermore, once the drive motor is turned on, it will drive the rotating rollers to rotate. Since the two rotating rollers are equipped with transmission belts on their outer sides, the transmission belts can be driven within the three cooling boxes 13. Since the workpieces are all installed on the hangers, it effectively ensures that the high-temperature workpieces pass through the cooling mechanism in an orderly manner.

[0028] Furthermore, the cooling mechanism includes a cooling box 13 located on top of the water tank 1, a water spray chamber 2 fixedly installed on top of the cooling box 13, a second pump body 21 fixedly installed on one side of the bottom of the water spray chamber 2, and a water spray pipe 22 connected to the bottom of the water spray chamber 2. The water spray pipe 22 is located on the top of the inner cavity of the cooling box 13. The water outlet of the second pump body 21 is connected to the water spray chamber 2, and the water inlet of the second pump body 21 is connected to the corresponding water tank 1 through a conduit.

[0029] After the second pump body 21 is started, it draws cooling water from the corresponding water tank 1 through the conduit, pressurizes it and delivers it to the spray chamber 2, so that the spray chamber 2 maintains a stable water pressure. The cooling water in the spray chamber 2 flows along the connected spray pipe 22. Since the spray pipe 22 is built into the top of the inner cavity of the cooling box 13, the cooling water can be directly delivered to the workpiece cooling area. When the workpiece passes through the cooling box 13, the cooling water continuously output by the spray pipe 22 acts on the surface of the workpiece to complete the heat exchange. At the same time, the relatively closed space formed by the cooling box 13 can prevent the cooling water from diffusing outward, so that the cooling water after absorbing heat flows back to the water tank 1 along the inner wall of the cooling box 13 or a preset path, realizing the directional recovery and recycling of cooling water, and ensuring the continuous and stable cooling process.

[0030] Furthermore, several nozzles are connected to the side wall of the water spray pipe 22, and all of the nozzles of the water spray pipe 22 are directed toward the center of the corresponding cooling box 13.

[0031] When the workpiece passes through the central area of ​​the cooling box 13, the centripetal water jets from multiple nozzles can cover the workpiece surface from different angles. Even if the workpiece has a complex cross-section or irregular shape, the centripetal water jets can focus on the cooling part of the workpiece, preventing the cooling water from dispersing to the edge of the cooling box 13. Finally, the cooling water forms a uniformly covered cooling layer on the workpiece surface, completes heat absorption through direct contact, and then returns to the water tank 1 along the return path.

[0032] Furthermore, support frames 12 are fixedly installed on the middle of both sides of the cooling box 13, and the other side of the support frame 12 is fixedly connected to the inner wall of the water tank 1.

[0033] When the second pump 21 drives the cooling water to spray onto the workpiece, the water flow will generate a lateral impact force on the cooling box 13. At the same time, when the workpiece is conveyed in the cooling box 13, it will generate slight friction and vibration with the inner wall of the cooling box 13. At this time, the support frame 12 can offset the impact force and vibration force through its own structural strength, limiting the displacement or shaking of the cooling box 13. The cooling box 13 always maintains the preset position to ensure that the workpiece can pass through the cooling area along a fixed path, avoiding the conveying deviation caused by the offset of the cooling box 13.

[0034] Furthermore, each cooling box 13 has an opening on both sides, and the two openings pass through the cooling box 13. Each cooling box 13 has a through groove 3 at the bottom, and a filter plate 31 is provided on the top of each through groove 3 to facilitate the passage of mold steel through the cooling box 13.

[0035] When the workpiece is conveyed along the production line, it enters the cooling area through an opening on one side of the cooling box 13 and exits through an opening on the other side after cooling is completed. The through opening on both sides ensures that the workpiece can be conveyed continuously without stopping. After the cooling water acts on the workpiece, the return water formed by heat absorption flows to the bottom of the cooling box 13 under the action of gravity and flows downward through the through groove 3 at the bottom. Before the return water enters the through groove 3, the filter plate 31 at the top of the through groove 3 will intercept and filter the return water to remove impurities such as mold steel oxide scale and metal shavings mixed in the return water. The filtered clean return water flows into the inner cavity of the water tank 1 through the through groove 3 to prevent impurities from entering the pump body or water spray pipe 22 with the return water and causing blockage.

[0036] Furthermore, each filter plate 31 is fixedly connected to a handle 32 on both sides of its top, and the filter plate 31 is movably positioned on the top of the through groove 3, which facilitates the installation and disassembly of the filter plate 31.

[0037] After the cooling system has been running for a long time, a large amount of impurities will accumulate on the surface of the filter plate 31, affecting the return water flow rate. At this time, the operator does not need to disassemble the cooling box 13, water spray pipe 22 and other related components. He only needs to hold the handles 32 on both sides of the top of the filter plate 31 and apply upward pulling force to remove the filter plate 31 from the top of the through groove 3. After cleaning the removed filter plate 31 or directly replacing it with a new filter plate 31, the filter plate 31 is put back into the top of the through groove 3 to complete the maintenance. The whole process depends on the movable installation method of the filter plate 31, without complicated tools or disassembly steps, realizing quick maintenance.

[0038] Furthermore, it also includes a cooling mechanism, which includes a cooling cover 4 connected to the bottom of the cooling box 13, several diversion pipes 41 connected to the bottom of the cooling cover 4, a bracket 14 fixedly installed on the side wall of the water tank 1, and a fan 15 fixedly installed on the top of the bracket 14. The fan 15 corresponds to several diversion pipes 41, and the several diversion pipes 41 are distributed at the bottom of the inner cavity of the water tank 1, which can cool the high temperature cooling water.

[0039] After the return water in the cooling box 13 absorbs heat, it first flows into the cooling cover 4, which is connected to the bottom of the cooling box 13. The cooling cover 4 gathers the dispersed return water. The gathered high-temperature return water flows downward along several diversion pipes 41 at the bottom of the cooling cover 4. The diversion pipes 41 disperse the concentrated return water into multiple streams. The diversion pipes 41 are distributed at the bottom of the inner cavity of the water tank 1, which greatly increases the contact area between the hot water and the air. At the same time, the fan 15 on the side wall support 14 of the water tank 1 starts. The air outlet of the fan 15 blows air towards the diversion pipes 41, which accelerates the air flow on the surface of the diversion pipes 41. The heat in the hot water is carried away by forced convection, which makes the temperature of the hot water drop rapidly. The cooled water flows into the bottom of the inner cavity of the water tank 1 and is then drawn to the cooling mechanism by the first pump body 11 or the second pump body 21 to form a complete cycle.

[0040] Furthermore, a water inlet pipe 16 is provided on the top of one side of the water tank 1, and the other end of the water inlet pipe 16 is connected to the cooling water source. A drain pipe 17 is installed at the bottom of the other side of the water tank 1, and the other end of the drain pipe 17 is connected to the water storage tank for storing and cooling high-temperature cooling water.

[0041] During the operation of the cooling system, the water level in water tank 1 will drop due to evaporation, minor leakage, etc. When the water level is lower than the preset threshold, the water supply pipe 16 is opened (manual or automatic control is possible) to draw cooling water from the external cooling water source and replenish the inner cavity of water tank 1, maintaining a stable total amount of cooling water in water tank 1 and preventing the cooling mechanism from shutting off due to insufficient water. At the same time, some of the cooling water in water tank 1 that has absorbed heat multiple times and has a high temperature (when it cannot be quickly reduced to the target temperature by the cooling mechanism) will flow out through the drain pipe 17 at the bottom of the other side of water tank 1 and be transported to the external water storage tank. The water storage tank (an external device, not shown in the figure) stores the high-temperature cooling water. After it cools naturally or undergoes other cooling treatments, it can be used for other processes in the production line that require warm water (such as workpiece preheating and equipment cleaning), realizing the cascade utilization of water resources.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A staged cooling structure for high alloy die steel production, characterized by, include: Water tank (1), the number of water tanks (1) is three, two of which are fixedly installed with a first pump body (11) on the side wall, the water outlet of each first pump body (11) is connected to the inner cavity of the corresponding water tank (1), and the water inlet of each first pump body (11) is connected to the inner cavity of the other two sets of water tanks (1) through a conduit; A cooling mechanism is provided at the top of the water tank (1). The cooling mechanism cools the workpiece passing through it by cooling water, and the cooling water after the cooling mechanism is used flows back into the water tank (1). The water delivery direction of the pump body is opposite to the cooling delivery path of the workpiece.

2. The graded cooling structure for high-alloy mold steel production according to claim 1, characterized in that, The cooling mechanism includes a cooling box (13) set on top of the water tank (1), a spray chamber (2) fixedly installed on top of the cooling box (13), a second pump body (21) fixedly installed on one side of the bottom of the spray chamber (2), and a spray pipe (22) connected to the bottom of the spray chamber (2). The spray pipe (22) is set on the top of the inner cavity of the cooling box (13). The outlet end of the second pump body (21) is connected to the spray chamber (2), and the inlet end of the second pump body (21) is connected to the corresponding water tank (1) through a conduit.

3. A staged cooling structure for high alloy die steel production according to claim 2, characterized in that, The side wall of the water spray pipe (22) is connected to several nozzles, and the nozzles of the water spray pipe (22) are all facing the center of the corresponding cooling box (13).

4. A staged cooling structure for the production of high alloy die steels according to claim 3, characterized in that, The cooling box (13) has a support frame (12) fixedly installed on the middle of both sides, and the other side of the support frame (12) is fixedly connected to the inner wall of the water tank (1).

5. A staged cooling structure for the production of high alloy die steels according to claim 4, characterized in that, Each of the cooling boxes (13) is open on both sides, and the two openings pass through the cooling box (13). Each of the cooling boxes (13) has a through groove (3) at the bottom, and a filter plate (31) is provided on the top of each through groove (3).

6. A staged cooling structure for high alloy die steel production according to claim 5, characterized in that, Each of the filter plates (31) is fixedly connected to a handle (32) on both sides of the top, and the filter plate (31) is movably disposed on the top of the through groove (3).

7. A graded cooling structure for the production of high-alloy mold steel according to claim 6, characterized in that, It also includes a cooling mechanism, which includes a cooling cover (4) installed at the bottom of the cooling box (13), a plurality of diversion pipes (41) installed at the bottom of the cooling cover (4), a bracket (14) fixedly installed on the side wall of the water tank (1), and a fan (15) fixedly installed on the top of the bracket (14). The fan (15) corresponds to the plurality of diversion pipes (41), and the plurality of diversion pipes (41) are distributed at the bottom of the inner cavity of the water tank (1).

8. A staged cooling structure for high alloy die steel production according to claim 7, characterized in that, A water inlet pipe (16) is provided on the top of one side of the water tank (1), and the other end of the water inlet pipe (16) is connected to the cooling water source. A drain pipe (17) is installed at the bottom of the other side of the water tank (1), and the other end of the drain pipe (17) is connected to the water storage tank for storing and cooling high-temperature cooling water.

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