A cooling device for rapidly cooling steel castings

Abstract

The invention relates to the technical field of metal smelting, and discloses a cooling device for rapidly cooling steel castings, comprising a body structure and a protective mechanism, wherein the body structure comprises a workbench fixed on the ground surface, a back frame is vertically arranged on the rear side of the upper surface of the workbench, track bars are symmetrically arranged on the front surface of the back frame, a lifting platform is vertically slidably installed between the two track bars, a lifting cylinder is fixed on the upper front side of the workbench, an output end of the lifting cylinder is installed on the lifting platform, and the protective mechanism comprises a cover body, a truncated cone-shaped smoke collecting cone is arranged on the top of the cover body, the cover body and the smoke collecting cone are hollow inside, and the top of the smoke collecting cone is fixed to the lower surface of the end of the lifting platform by bolts, when cooling the steel casting, the cover body is controlled to cover it, and the steel casting inside is sprayed and cooled by the nozzle inside the cover body, at this time, the high-temperature gas generated will be retained in the cover body and cannot be dispersed, and the steam inside the cover body is extracted by the exhaust fan on the top.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting, in particular to a cooling device for rapidly cooling a steel casting. Background Art

[0002] Steel castings are one of the common materials in industry. Steel castings refer to parts made of cast steel. They have similar properties to cast iron, but are stronger than cast iron. Steel castings are prone to defects such as porosity defects and inaccurate angle positioning during the casting process. During long-term use, the casing may break. The temperature of newly made steel castings is high and a cooling device is required to cool them down. On the one hand, it can facilitate subsequent handheld operations, and on the other hand, it can prevent the phenomenon of reduced processing accuracy due to thermal expansion and contraction of castings.

[0003] In the prior art, steel castings are mostly cooled by natural air cooling or spray cooling. Spray cooling can increase the cooling speed and save water to the greatest extent, so it is widely used. However, since the surface of steel castings has a high temperature, spraying water directly on the surface will generate a large amount of steam, which not only pollutes the environment but also the high-temperature steam can easily scald the workers. In addition, when encountering complex steel castings, the spraying effect from the top to the bottom is not good, resulting in the bottom of the steel casting failing to meet the temperature requirements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a cooling device for rapidly cooling steel castings, thereby solving the problem of rapidly cooling steel castings during production.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a cooling device for quickly cooling cast steel parts, including a body structure and a protective mechanism, the body structure including a workbench fixed on the ground surface, a back frame is vertically arranged on the rear side of the upper surface of the workbench, and track bars are symmetrically arranged on the front surface of the back frame. A lifting platform is vertically slidably installed between the two track bars, a lifting cylinder is fixed above the front side of the workbench, and the output end of the lifting cylinder is installed on the lifting platform, the protective mechanism includes a cover body, a truncated cone-shaped smoke collecting cone is arranged on the top of the cover body, the cover body and the smoke collecting cone are hollow inside, and the top of the smoke collecting cone is fixed to the lower surface of the lifting platform end by bolts, a plurality of spray mechanisms are evenly arranged on the surface of the cover body, and the surface of the cover body is also provided with an angle control mechanism for controlling the spray mechanism, a water storage tank is arranged inside the workbench, the water storage tank is flush with the upper surface of the workbench, and a casting rotation mechanism is arranged inside the water storage tank.

[0006] Furthermore, the spray mechanism includes a rotating shaft that rotates evenly on the surface of the cover body, and clamping rods are symmetrically arranged on one side where multiple rotating shafts are close to each other. A nozzle is fixed between two of the clamping rods by bolts. The nozzle is placed inside the cover body, and a nozzle is installed at the end of the nozzle. A water injection hose is connected to the top of the nozzle, and the water injection hose passes through the cover body. The end of the water injection hose is connected to a high-pressure water pump.

[0007] Furthermore, an extension plate is provided on the outside of the rotating shaft, and the extension plate is placed on the outside of the cover body. A U-shaped groove is provided on the surface of the extension plate, and the end of the U-shaped groove is open.

[0008] Furthermore, the angle control mechanism includes a ring sliding on the surface of the cover body, the ring is placed below the spray mechanism, and a plurality of protrusions are evenly arranged on the surface of the ring, and the protrusions correspond to the spray mechanisms one by one.

[0009] Furthermore, a column is fixed on the top of the protrusion, and the column passes through the U-shaped groove. Two limit plates are arranged on the surface of the column, and the two limit plates are respectively placed on the upper and lower sides of the extension plate.

[0010] Furthermore, push rods are fixed at the bottom of the two symmetrical protrusions, support ear plates are symmetrically welded on the surface of the cover body, the push rods vertically penetrate the support ear plates, and a limiting head is set at the bottom of the push rods, and the limiting head exceeds the lower surface of the cover body.

[0011] Furthermore, a ball is embedded in the lower surface of the limit head, a spring is sleeved on the surface of the push rod, and the spring is placed between the support ear plate and the limit head.

[0012] Furthermore, the casting rotation mechanism includes a rotating ring rotating on the upper surface of the water tank and a control cylinder. The rotating ring is placed directly below the protective mechanism. A steel mesh is laid inside the rotating ring. Oblique support rods are symmetrically arranged at the bottom of the rotating ring, and gears are fixed to the bottom of multiple oblique support rods.

[0013] Furthermore, the control cylinder is placed at the rear of the workbench, and a gear rod is installed at the output end of the control cylinder, and the gear rod is meshed with the gear.

[0014] Furthermore, an exhaust fan is fixed on the top of the lifting platform, and the exhaust fan is placed above the smoke collecting cone.

[0015] The present invention provides a cooling device for rapidly cooling steel castings. It has the following beneficial effects:

[0016] 1. The present invention controls the hood to cover the steel casting when cooling it, and sprays the steel casting inside the hood to cool it. The high-temperature gas generated at this time will be retained in the hood and cannot be dispersed, and the steam inside the hood is extracted by the exhaust fan on the top and discharged through the corresponding pipeline, so as to prevent the steam from polluting the surrounding environment and improve the safety during work.

[0017] 2. The cover body of the present invention is provided with a plurality of nozzles, and by controlling the height of the cover body, the angle control mechanism can be driven to synchronously control the angles of the plurality of nozzles, so that the nozzles can swing at a certain angle to expand the spraying area, and cooperate with the casting rotating mechanism at the bottom to drive the steel casting to rotate, so as to realize multi-directional spraying and cooling work for complex steel castings.

[0018] 3. When the cover of the present invention gradually falls to cover the steel casting, if the steel casting is not placed in the center and causes impact on the nozzle, the nozzle can be buffered by tilting at a certain angle to prevent damage to the nozzle caused by the impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall installation three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the protection mechanism of the present invention;

[0021] Figure 3 It is a schematic diagram of the front view structure of the protection mechanism of the present invention;

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the cross-sectional structure;

[0023] Figure 5 It is a schematic diagram of the structure of the spray mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the casting rotating mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A.

[0026] Among them, 1. Machine body structure; 101. Workbench; 102. Back frame; 103. Track bar; 104. Lifting cylinder; 105. Lifting platform; 106. Water storage tank; 2. Casting rotating mechanism; 201. Rotating ring; 202. Steel net; 203. Oblique support rod; 204. Gear; 205. Control cylinder; 206. Gear rod; 3. Protection mechanism; 301. Cover; 302. Smoke cone; 303 , support ear plate; 4, spray mechanism; 401, rotating shaft; 402, clamping rod; 403, spray pipe; 404, spray head; 405, water injection hose; 406, extension plate; 407, U-shaped groove; 5, angle control mechanism; 501, collar; 502, bump; 503, column; 504, limit plate; 505, push rod; 506, limit head; 507, spring; 508, ball; 6, exhaust fan. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] Please refer to Figure 1-Figure 5As shown, a cooling device for rapidly cooling a steel casting comprises a machine body structure 1 and a protection mechanism 3. The machine body structure 1 comprises a workbench 101 fixed to the ground surface. A back frame 102 is vertically arranged on the rear side of the upper surface of the workbench 101. Track bars 103 are symmetrically arranged on the front side of the back frame 102. The cross section of the track bar 103 is a T-shaped structure. A lifting platform 105 is vertically slidably installed between the two track bars 103 so that the lifting platform 105 can only slide in the vertical direction. A lifting cylinder 104 is fixed on the upper side, and the output end of the lifting cylinder 104 is installed on the lifting platform 105, so that the height of the lifting platform 105 can be controlled by the lifting cylinder 104. The protection mechanism 3 includes a cover body 301, and a truncated cone-shaped smoke collecting cylinder 302 is arranged on the top of the cover body 301. The cover body 301 and the smoke collecting cone 302 are hollow inside, and the top of the smoke collecting cone 302 is fixed to the lower surface of the end of the lifting platform 105 by bolts. When the steel casting is sprayed and cooled, it is sprayed through the cover body 301. The hood 301 is covered so that the produced steam is placed inside the hood body 301. An exhaust fan 6 is fixed on the top of the lifting platform 105. The exhaust fan 6 is placed above the smoke collecting cone 302 to extract the steam generated inside the hood body 301 and discharge it through the corresponding pipeline. A plurality of spray mechanisms 4 are evenly arranged on the surface of the hood body 301. The plurality of spray mechanisms 4 spray and cool the cast steel parts inside the hood body 301. The height of the spray mechanism 4 is changed by the up and down movement of the hood body 301, and then sprays from top to bottom. The surface of the hood body 301 is also provided with an angle control mechanism 5 for controlling the spray mechanism 4 to expand the spraying area. The angle can be controlled by electronic control. A water storage tank 106 is arranged inside the workbench 101. The water storage tank 106 is flush with the upper surface of the workbench 101. Excess spray water will flow back into the water storage tank 106 to prevent waste of water resources. A casting rotating mechanism 2 is arranged inside the water storage tank 106 to drive the steel casting to rotate and ensure the uniformity of the spraying area.

[0030] Embodiment 2:

[0031] Please refer to Figure 2-Figure 5As shown, the spray mechanism 4 includes a rotating shaft 401 that rotates evenly on the surface of the cover body 301. The axis of the rotating shaft 401 is in a horizontal position, and eight spray mechanisms 4 are distributed to perform multi-directional spraying work on the cast steel part at the center position. A clamping rod 402 is symmetrically arranged on one side where multiple rotating shafts 401 are close to each other. A nozzle 403 is fixed between the two clamping rods 402 by bolts to facilitate the installation or removal of the nozzle 403. At the same time, the angle of the rotating shaft 401 can be controlled to control the spraying of the casting. The angle of the nozzle 403 is controlled, the nozzle 403 is placed inside the cover body 301, and a nozzle 404 is installed at the end of the nozzle 403. The eight nozzles 404 all face the center of the cover body 301 and atomize the high-pressure water flow inside the nozzle 403 and spray it out. A water injection hose 405 is connected to the top of the nozzle 403. The water injection hose 405 runs through the cover body 301. The hose can effectively adapt to the change of the angle of the nozzle 403. The end of the water injection hose 405 is connected to the high-pressure water pump to inject water into the multiple nozzles 403.

[0032] Among them, an extension plate 406 is arranged on the outside of the rotating shaft 401, and the extension plate 406 is placed on the outside of the cover body 301. The extension plate 406 and the clamping rod 402 are respectively placed on both sides of the axis of the rotating shaft 401 and are fixed. The angle of the nozzle 404 can be controlled by controlling the external extension plate 406. A U-shaped groove 407 is opened on the surface of the extension plate 406, and the end of the U-shaped groove 407 is open to facilitate installation and docking.

[0033] Please refer to Figure 2 and Figure 7 As shown, the angle control mechanism 5 includes a collar 501 sliding on the surface of the cover body 301, the collar 501 is placed under the spray mechanism 4, a plurality of protrusions 502 are evenly arranged on the surface of the collar 501, the protrusions 502 correspond to the spray mechanism 4 one by one, a column 503 is fixed on the top of the protrusion 502, the column 503 passes through the U-shaped groove 407, two limit plates 504 are arranged on the surface of the column 503, and the two limit plates 504 are respectively placed on the upper and lower sides of the extension plate 406. When the collar 501 moves upward, it can drive the plurality of columns 503 on its surface to move upward synchronously, and then drive the extension plate 406 to flip upward through the cooperation of the limit plates 504 and the U-shaped groove 407, so that the internal nozzle 404 sprays downward, and vice versa, the nozzle 404 can be controlled to spray upward.

[0034] Please refer to Figure 2 , Figure 3 and Figure 7As shown, push rods 505 are fixed at the bottom of two symmetrical protrusions 502, and support ear plates 303 are symmetrically welded on the surface of the cover body 301. The push rods 505 vertically penetrate the support ear plates 303. The push rods 505 and the support ear plates 303 on both sides cooperate to make the ring 501 only slide vertically along the axis. A limit head 506 is set at the bottom of the push rod 505. The cross-section of the limit head 506 is larger than that of the push rod 505. The limit head 506 exceeds the lower surface of the cover body 301. When the bottom of the cover body 301 does not contact with the casting rotating mechanism 2, the limit head 506 can first contact it, so that space is reserved at the bottom of the cover body 301 to facilitate the entry of external air. At the same time, the internal steam flows upward and will not flow out through the bottom gap.

[0035] Please refer to Figure 3 As shown, a ball 508 is embedded in the lower surface of the limit head 506. When the casting rotating mechanism 2 rotates, the friction force can be reduced by the ball 508. A spring 507 is sleeved on the surface of the push rod 505. The spring 507 is placed between the supporting ear plate 303 and the limit head 506. The spring 507 can ensure that the limit head 506 is placed at the bottom when there is no force. At this time, the nozzle 404 is tilted upward. When the cover body 301 continues to move downward, the limit head 506 will be squeezed upward, and then the nozzle 404 will rotate downward. The direction of the nozzle 404 is controlled by controlling the gap size between the cover body 301 and the casting rotating mechanism 2. Therefore, in this embodiment, there is no need to add an electric control device for the angle of the spray mechanism 4.

[0036] Embodiment 3:

[0037] Please refer to Figure 1 and Figure 6 As shown, the casting rotating mechanism 2 includes a rotating ring 201 and a control cylinder 205 rotating on the upper surface of the water storage tank 106. The rotating ring 201 is placed directly below the protective mechanism 3. A steel mesh 202 is laid inside the rotating ring 201 to place the steel casting to be cooled at the center of the steel mesh 202 to drive the steel casting to rotate, and excess water will flow into the water storage tank 106 through the steel mesh 202. Oblique support rods 203 are symmetrically arranged at the bottom of the rotating ring 201, and gears 204 are fixed at the bottom of the plurality of oblique support rods 203. The bottom of the oblique support rods 203 gradually tilts toward the center so that the gears 204 are much smaller than the size of the rotating ring 201.

[0038] The control cylinder 205 is placed at the rear of the workbench 101, and a gear rod 206 is installed at the output end of the control cylinder 205. The gear rod 206 meshes with the gear 204 to drive the rotating ring 201 to rotate through the control cylinder 205, and then drive the cast steel parts on its surface to rotate.

[0039] In addition, in this embodiment, if a rotating motor is provided directly below the rotating ring 201, the falling water flow will affect the motor, which may easily cause a short circuit and thus lead to insufficient safety.

[0040] Embodiment 4:

[0041] Please refer to Figure 1-Figure 5 As shown, a cooling device for rapidly cooling steel castings comprises a body structure 1 and a protective mechanism 3. In this embodiment, a cover body 301 covers the steel castings, and sprays and cools the steel castings through a spray mechanism 4 inside the cover body 301, at which time high-temperature steam is generated. A plurality of nozzles 404 are arranged inside the cover body 301, and these nozzles are connected to a high-pressure water pump, and a high-pressure water flow is atomized and sprayed out through the nozzles 404. Taking the industrial standard model KQW-2000 high-pressure water pump as an example, it can provide a water pressure of 0.8MPa to ensure rapid cooling of the steel castings.

[0042] In order to effectively extract the steam inside the cover 301, an exhaust fan 6, model YWF-4D-400, is installed on the top of the cover 301. The exhaust volume of the exhaust fan is 2500 cubic meters per hour, which can effectively extract the steam inside the cover 301 within 5 minutes. By using a steel pipe with a diameter of 80 mm to connect the exhaust fan and the exhaust system, the steam can be directly introduced into the central exhaust duct to avoid pollution of the surrounding environment.

[0043] Experimental control data table:

[0044]

[0045] In the experiment, when cooling a steel casting weighing 100 kilograms, the temperature dropped from 800°C to 150°C within 20 minutes, ensuring that the steel casting would not crack due to the sudden drop in temperature while cooling rapidly. This not only reduced the cooling time and improved production efficiency, but also effectively protected the surrounding operators from being harmed by high-temperature steam.

[0046] Embodiment 5:

[0047] Please refer to Figure 1-Figure 5 As shown, in this embodiment, a plurality of nozzles 404 are arranged inside the cover body 301, and the angle of the nozzle is controlled by the angle control mechanism 5 to expand the spraying area. Specifically, the nozzles 404 in the spraying mechanism 4 are driven to be adjusted synchronously by the sliding collar 501 and the bump 502 thereon. In actual operation, the collar 501 is made of a steel ring with a diameter of 450 mm and a surface hardness of HRC45, which ensures that it will not be worn during high-intensity exercise.

[0048] To achieve multi-angle spraying, the column 503 passes through the U-shaped groove 407 and is controlled by a servo motor (model SGM7J-08A7A). The servo motor can control the rotating shaft 401 to swing within an angle range of 0° to 30°, thereby ensuring that the nozzle 404 can cover all parts of the steel casting. In this way, the bottom and complex internal parts of the casting can be effectively cooled, especially for irregular-shaped castings, the coverage rate of the spray can reach more than 98%, significantly improving the cooling effect.

[0049] Experimental control data table:

[0050]

[0051] Experiments show that by controlling the angle of the nozzle, the cooling dead angle can be effectively reduced. When conducting experiments on steel castings with complex structures, the spraying time was 15 minutes, and the temperature difference on the casting surface was controlled within ±3°C, ensuring the effect of uniform cooling, effectively reducing the stress concentration caused by uneven cooling of the casting, and preventing the cracking or deformation of the steel casting.

[0052] Embodiment 6:

[0053] Please refer to Figure 2 and Figure 7 As shown, in this embodiment, when the cover body 301 gradually falls to cover the steel casting, if the steel casting is not placed in the center and causes impact on the nozzle 404, the nozzle 404 can be buffered by tilting at a certain angle. The push rod 505 vertically penetrates the support ear plate 303, and a spring 507 is sleeved on the surface of the push rod 505 to achieve automatic buffering.

[0054] The push rod 505 is made of stainless steel with a diameter of 25 mm, and the cross-sectional diameter of the stop head 506 is 30 mm. The elastic coefficient of the spring 507 is 5N / mm, ensuring that when the nozzle 404 is subjected to an external force of more than 15N, it can automatically tilt for buffering, thereby protecting the nozzle and connecting parts from damage. The ball 508 is installed on the lower surface of the stop head 506, and a bearing steel ball with a diameter of 10 mm is used, which can reduce friction when the casting rotating mechanism 2 rotates, thereby extending the service life of the device.

[0055] Experimental control data table:

[0056]

[0057] In the experiment, when the cover 301 falls at a speed of 50 mm / s, the push rod 505 can react quickly when the casting is not placed in the center, and tilt the nozzle upward by 5° to 10° to avoid collision. Through this structure, the probability of damage to the nozzle due to misoperation is reduced, ensuring the long-term stable operation of the equipment.

[0058] Embodiment 7:

[0059] Please refer to Figure 1 and Figure 6 As shown, in this embodiment, the casting rotating mechanism 2 includes a rotating ring 201 on the upper surface of the water storage tank 106 and a control cylinder 205. The rotating ring 201 is made of carbon steel with a diameter of 1200 mm, and a steel mesh 202 is laid inside. The steel mesh is woven with high-strength steel wire with a diameter of 5 mm and a mesh size of 20 mm. The casting rotating mechanism 2 drives the gear rod 206 to mesh with the gear 204 through the control cylinder 205, thereby driving the rotating ring 201 to rotate.

[0060] In this embodiment, the model of the control cylinder 205 is SC63×250, which can provide a maximum thrust of 1000N. Through the design of the gear ratio, the rotation speed of the rotating ring 201 can be maintained at 5 rpm, ensuring the uniform rotation of the steel casting during the spray cooling process, thereby improving the cooling uniformity. When cooling a steel casting with a diameter of 800 mm and a weight of 150 kg, the cooling water is evenly covered on all parts of the casting through the cooperation of the bottom casting rotating mechanism, ensuring that the surface temperature difference of the steel casting does not exceed ±5°C.

[0061] Experimental control data table:

[0062]

[0063] The experimental results show that within 20 minutes, the temperature of the steel casting dropped from 900°C to 100°C. The rotation stability of the casting was good during the entire cooling process, and the cooling effect was significant, which improved the surface quality of the steel casting and reduced structural defects caused by uneven cooling.

[0064] Working principle: When in use, first keep the workbench 101 fixed so that the back frame 102 is perpendicular to the ground, and connect multiple water injection hoses 405 to the high-pressure water pump respectively. The height of the lifting platform 105 can be controlled by the lifting cylinder 104, and then the height of the protective mechanism 3 is controlled. First, the protective mechanism 3 is controlled to move up as a whole to expose the top of the casting rotating mechanism 2, and then the casting to be cooled is clamped and placed in the center of the steel mesh 202, and then the casting is gradually covered from top to bottom by the protective mechanism 3.

[0065] When the protective mechanism 3 covers the casting, the high-pressure water pump can be turned on to inject cooling water into the multiple water injection hoses 405. At this time, the cooling water will be sprayed to the central position through the nozzle 403 and the nozzle 404 to achieve temperature reduction control of the casting at the central position. In this process, the steam and exhaust gas generated by the high temperature of the casting will be extracted through the top exhaust fan 6. At the same time, the height of the cover body 301 is controlled by the lifting cylinder 104 so that the ball 508 contacts the steel mesh 202. The rolling of the ball 508 can reduce the friction between the two. When the cover body 301 changes in height, the limit head 506 will be squeezed, and then the ring 501 will be driven to move axially relative to the cover body 301. At this time, the multiple columns 503 on the surface of the ring 501 will change in height. At this time, the rotation axis 401 can be driven to change its angle through the cooperation of the limit plate 504 and the extension plate 406 to control the water spraying direction of the multiple nozzles 404.

[0066] Start the control cylinder 205 to drive the gear rod 206 to move back and forth, and then drive the rotating ring 201 to rotate through the mutual engagement of the gear rod 206 and the gear 204, and then drive the casting to rotate within a certain angle, and the sprayed water will flow into the water storage tank 106 through the filtration of the steel mesh 202 for centralized treatment.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for rapidly cooling a steel casting, comprising a body structure (1) and a protection mechanism (3), characterized in that: The machine body structure (1) comprises a workbench (101) fixed on the ground surface, a back frame (102) is vertically arranged on the rear side of the upper surface of the workbench (101), a track bar (103) is symmetrically arranged on the front surface of the back frame (102), a lifting platform (105) is vertically slidably installed between two track bars (103), a lifting cylinder (104) is fixed on the upper front side of the workbench (101), and the output end of the lifting cylinder (104) is installed on the lifting platform (105), and the protective mechanism (3) comprises a cover body (301), a truncated cone-shaped smoke collecting cone (302) is arranged on the top of the cover body (301), the cover body (301) and the smoke collecting cone (302) are hollow inside, the top of the smoke collecting cone (302) is fixed to the lower surface of the end of the lifting platform (105) by bolts, a plurality of spray mechanisms (4) are evenly arranged on the surface of the cover body (301), and an angle control mechanism (5) for controlling the spray mechanism (4) is also arranged on the surface of the cover body (301), and a water storage tank (106) is arranged inside the workbench (101), The water storage box (106) is flush with the upper surface of the workbench (101), and a casting rotating mechanism (2) is arranged inside the water storage box (106); The spray mechanism (4) comprises a rotating shaft (401) that rotates uniformly on the surface of the cover body (301); a clamping rod (402) is symmetrically arranged on one side where a plurality of the rotating shafts (401) are close to each other; a spray pipe (403) is fixed between two of the clamping rods (402) by bolts; the spray pipe (403) is placed inside the cover body (301); a spray head (404) is installed at the end of the spray pipe (403); a water injection hose (405) is connected to the top of the spray pipe (403); the water injection hose (405) passes through the cover body (301); and the end of the water injection hose (405) is connected to a high-pressure water pump; An extension plate (406) is provided outside the rotating shaft (401), the extension plate (406) is placed outside the cover body (301), a U-shaped groove (407) is provided on the surface of the extension plate (406), and the end of the U-shaped groove (407) is open; The angle control mechanism (5) comprises a collar (501) sliding on the surface of the cover body (301), the collar (501) being placed below the spray mechanism (4), a plurality of protrusions (502) being evenly arranged on the surface of the collar (501), the protrusions (502) corresponding one to one with the spray mechanism (4), a column (503) being fixed on the top of the protrusion (502), the column (503) passing through the U-shaped groove (407), two limit plates (504) being arranged on the surface of the column (503), the two limit plates (504) being placed on the upper and lower sides of the extension plate (406) respectively; A push rod (505) is fixed at the bottom of the two symmetrical protrusions (502), a support ear plate (303) is symmetrically welded on the surface of the cover body (301), the push rod (505) vertically penetrates the support ear plate (303), a limit head (506) is arranged at the bottom of the push rod (505), the limit head (506) protrudes from the lower surface of the cover body (301), a ball (508) is embedded in the lower surface of the limit head (506), and a spring (507) is sleeved on the surface of the push rod (505), and the spring (507) is placed between the support ear plate (303) and the limit head (506).

2. A cooling device for rapidly cooling a steel casting according to claim 1, characterized in that: The casting rotating mechanism (2) comprises a rotating ring (201) rotating on the upper surface of the water storage tank (106) and a control cylinder (205); the rotating ring (201) is placed directly below the protection mechanism (3); a steel mesh (202) is laid inside the rotating ring (201); oblique support rods (203) are symmetrically arranged at the bottom of the rotating ring (201); and gears (204) are fixed to the bottoms of a plurality of the oblique support rods (203).

3. A cooling device for rapidly cooling a steel casting according to claim 2, characterized in that: The control cylinder (205) is placed at the rear of the workbench (101), and a gear rod (206) is installed at the output end of the control cylinder (205), and the gear rod (206) is meshed with the gear (204).

4. A cooling device for rapidly cooling a steel casting according to claim 1, characterized in that: An exhaust fan (6) is fixed on the top of the lifting platform (105), and the exhaust fan (6) is placed above the smoke collecting cone (302).

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