Cooling device for alloy melt

Abstract

The utility model relates to the field of casting, in particular to an alloy melt cooling device which comprises nozzles, the nozzle portions of the nozzles face a sampling mold, the nozzles are evenly arranged on the periphery of the sampling mold, and a to-be-cooled alloy melt is arranged in the sampling mold; the cross section, perpendicular to the liquid outlet direction, of the nozzle is in a long strip shape, and an opening, in the liquid outlet direction, of the nozzle is gradually increased. The nozzle continuously sprays the cooling liquid water curtain towards the sampling mold, the water curtain completely wraps the outer wall of the sampling mold and flows down along the outer wall, heat is continuously taken away, the cooling speed of the alloy melt can be increased, and meanwhile the cooling uniformity of the alloy melt is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of casting, specifically to a cooling device of alloy melt. BACKGROUND

[0002] In the production process of alloy melt, sampling operation is an important step for detecting the composition and quality of the melt. Alloy melt is usually cooled by natural cooling, which has a slow cooling speed and may cause composition segregation or porosity in the sample block, thereby affecting the accuracy of subsequent detection results.

[0003] To accelerate the cooling speed of alloy melt, the commonly used scheme is air cooling or water cooling. The cooling speed of air cooling is limited and difficult to cool quickly. Water cooling usually involves placing a sampling mold carrying alloy melt in a cooling liquid. Although water cooling has a high cooling speed, it is difficult to remove heat in time after the heat of alloy melt is transferred to the water. Even if the water is stirred to flow and remove heat, it is difficult to uniformly control the heat in contact with the sampling mold, which affects the uniformity of alloy melt cooling and causes composition segregation in the alloy, resulting in inaccurate detection results. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a cooling device capable of uniformly cooling alloy melt. The nozzle continuously sprays a water curtain of cooling liquid towards the sampling mold, the water curtain completely wraps the outer wall of the sampling mold and flows down along the outer wall, continuously removing heat, which can accelerate the cooling speed of alloy melt while improving the cooling uniformity of alloy melt.

[0005] The specific technical scheme adopted by the present application is as follows: a cooling device for alloy melt, comprising nozzles facing the sampling mold and uniformly arranged around the sampling mold, the sampling mold being internally provided with alloy melt to be cooled; the cross section of the nozzle perpendicular to the liquid outlet direction is strip-shaped, and the opening of the nozzle along the liquid outlet direction gradually increases.

[0006] Preferably, the sampling mold comprises a bottom and a side wall, and the bottom and the side wall jointly form a spoon shape, and the nozzle has a nozzle portion facing the side wall of the sampling mold.

[0007] Preferably, the number of nozzles is 3-8.

[0008] Preferably, the number of nozzles is 4, and the ratio of the length to the width of the strip-shaped cross section is 3:1.

[0009] Preferably, the number of nozzles is 4, and the cross section of the nozzle is trapezoidal, the long side of the trapezoid faces the sampling mold, and the slope of the trapezoid is 0.6.

[0010] Preferably, the bottom of the sampling mold is arc-shaped.

[0011] Preferably, further comprising a shell containing cooling liquid, the upper part of the shell is provided with an opening capable of containing a sampling mold, further comprising a refrigeration assembly and a cooling pipe, the refrigeration assembly delivers cooling liquid through the cooling pipe to the nozzle to spray out.

[0012] Further preferably, the opening containing the sampling mold is frustum-shaped, the upper end is small, and the lower end is large.

[0013] Preferably, further comprising a handle, the handle is fixedly connected with the sampling mold.

[0014] Further, the handle further comprises a hand guard, the hand guard is fixedly connected with the handle.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The cooling liquid of the present application is compressed into a uniform water curtain through the nozzle, which is continuously sprayed towards the sampling mold. The water curtain completely wraps the outer wall of the sampling mold and flows down along the outer wall. The moving water curtain continuously carries away heat, which can accelerate the cooling speed of the alloy melt while improving the cooling uniformity of the alloy melt, reducing the possibility of component segregation due to uneven cooling of the alloy melt, and improving the accuracy of the detection experiment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an internal structure sectional view of the embodiment of the present application;

[0018] Figure 2 It is a cooling pipe cooling liquid circulation schematic diagram when the embodiment of the present application is used, and the blue part in the figure is the cooling liquid;

[0019] Figure 3 It is a schematic diagram of the nozzle spraying a scattered cooling liquid curtain, and the blue part in the figure is the cooling liquid;

[0020] Figure 4 a) is a schematic diagram of the internal structure of the nozzle; b) is a front view of the nozzle;

[0021] Figure 5 It is a schematic diagram of the sampling mold structure of the embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the sample block detection point of the comparative experiment of the embodiment of the present application;

[0023] In the figure: 1, shell; 11, liquid storage chamber; 12, cooling port; 13, liquid leakage hole; 2, cooling pipe; 3, sampling mold; 31, containing groove; 32, lap flange; 33, handle; 34, hand guard; 4, nozzle; 5, water pump; 6, refrigeration assembly; 61, water passing plate; 62, heat exchange plate; 63, cooling fan; 100, aluminum alloy melt. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0025] Therefore, the following detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely illustrates some embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] Example

[0027] Please see Figures 1 to 5 This embodiment takes the detection of aluminum alloy melt 100 as an example and provides a cooling device for the alloy melt, characterized in that it includes nozzles 4 with their mouths facing the sidewall of the sampling mold 3 and evenly arranged around the sampling mold 3, wherein the aluminum alloy melt 100 to be cooled is disposed inside the sampling mold 3; Figure 4 As shown, the nozzle 4 has an elongated cross-section perpendicular to the liquid outlet direction, and the opening of the nozzle 4 gradually increases in size along the liquid outlet direction. In this embodiment, the coolant is compressed into a uniform water curtain through the nozzle 4 and continuously sprayed towards the sampling mold 3. The water curtain completely covers the outer wall of the sampling mold 3 and flows down the outer wall, with the moving water curtain continuously carrying away heat. Specifically, the sampling mold 3 includes a bottom and side walls, which together form a spoon shape, and the nozzle 4 faces the side wall of the sampling mold. Compared to placing the sampling mold 3 directly in static water or stirred flowing water, the coolant used in this embodiment is constantly renewed and moving. The temperature of the coolant sprayed on all parts of the side wall of the sampling mold 3 remains consistent, which can accelerate the cooling rate of the aluminum alloy melt 100 while improving the cooling uniformity of the aluminum alloy melt 100, reducing the possibility of component segregation due to uneven cooling of the aluminum alloy melt 100, and improving the accuracy of the detection experiment.

[0028] Preferably, the number of nozzles 4 is 3-8, which are evenly arranged in a centrally symmetrical manner around the sampling mold 3.

[0029] In this embodiment, there are four nozzles 4, and the length-to-width ratio of the elongated shape is 3:1. The cross-section of the nozzle 4 is trapezoidal, with the long side of the trapezoid facing the sampling mold 3, and the slope of the trapezoid is 0.6.

[0030] In this embodiment, as Figure 2As shown, the bottom of the sampling mold 3 is arc-shaped. The coolant curtain is sprayed onto the side wall of the sampling mold 3. The water curtain flows along the side wall to the bottom of the arc and converges and flows out at the bottom of the arc, thus completely covering the sampling mold 3. This increases the contact area and contact time between the coolant curtain and the side wall of the sampling mold 3. The heat exchange area and the contact area and time with the coolant at each point on the side wall are the same, which can further accelerate the cooling speed and make the cooling more uniform.

[0031] like Figure 1 As shown, in this embodiment, a housing 1 for containing coolant is also included. A cooling port 12 for accommodating a sampling mold 3 is provided above the housing 1. The sampling mold 3 is placed on the cooling port 12, and the receiving groove 31 of the sampling mold 3 is submerged in the cooling port 12. The cooling pipe 2 is connected to the housing 1, and each branch of the cooling pipe 2 is connected to the nozzle 4. A liquid storage chamber 11 is also provided inside the housing 1, communicating with the cooling port 12. A leakage hole 13 is provided at the bottom of the liquid storage chamber 11. The water inlet end of the cooling pipe 2 is fixed to and communicates with the leakage hole 13 in the liquid storage chamber 11. The cooling device for the alloy melt also includes a water pump 5, which is connected to the cooling pipe 2. Nozzle 4 sprays a water curtain that surrounds the outer wall of the receiving tank 31 and flows into the storage chamber 11. The remaining coolant mixes with the coolant stored in the storage chamber, and the mixed coolant then flows back into the cooling pipe 2 from the bottom of the storage chamber 11. This achieves the function of hot and cold mixing and automatic circulation of coolant, eliminating the need for external coolant input, reducing coolant consumption, and avoiding the uneven cooling of the coolant near and away from the receiving tank 31 that occurs when the sampling mold 3 is placed directly in the coolant. This results in more uniform cooling and reduces the possibility of compositional segregation in the aluminum alloy melt 100. Secondly, the enclosure of the cooling device prevents the coolant from coming into contact with the aluminum alloy melt 100, thus avoiding dangerous accidents such as explosions.

[0032] As a further preferred embodiment, this embodiment also includes a refrigeration component 6, which is connected to the cooling pipe 2. In this embodiment, the refrigeration component 6 includes a water-passing plate 61, a heat exchange plate 62, and a cooling fan 63. The cooling fan 63 is fixed to one side of the heat exchange plate 62, and its outlet is open to the outside. The water-passing plate 61 is fixed to the other side of the heat exchange plate 62, and the cooling pipe 2 is connected to the water-passing plate 61. The refrigeration component 6 further cools the mixed coolant circulating back to the cooling pipe 2, reducing the temperature of the coolant water curtain sprayed again onto the receiving tank 31, thereby further accelerating the cooling speed and uniformity of the aluminum alloy melt 100.

[0033] As a further preferred, the cooling port 12 of the sampling mold 3 of the embodiment is frustoconical, with a smaller diameter at the upper end and a larger diameter at the lower end. The overlapping flange 32 of the sampling mold 3 overlaps the upper end of the cooling port 12 to stabilize the placement of the sampling mold 3, and the accommodation groove 31 extends into the interior of the cooling port 12. The nozzle 4 is fixed to the lower end of the cooling port 12, thereby increasing the distance between the nozzle 4 and the outer wall of the accommodation groove 31, facilitating the complete wrapping of the outer wall of the accommodation groove 31 by the water curtain, and further ensuring uniform cooling.

[0034] As an embodiment, as shown in Figure 5 The handle 33 is fixedly connected to the sampling mold 3, and the hand guard 34 is fixedly connected to the handle 33. The high-temperature aluminum alloy melt 100 is contained in the accommodation groove 31, the elongated handle can effectively isolate the harm of high temperature to the human body, and the hand guard 34 can prevent the aluminum alloy melt 100 from falling off during transportation and causing harm to personnel.

[0035] In addition, the sampling mold 3 of the embodiment preferably has a wall thickness of 2-3 mm, a bottom curvature of 0.628-1 rad, and a bottom center thickness of 6-10 mm, at which the cooling effect and the flow guiding property of the bottom to the cooling liquid are in a most balanced state.

[0036] The aluminum alloy melt 100 was subjected to comparative cooling experiments. All the experiments used a sampling mold 3 with an outer diameter of φ65 mm, a wall thickness of 2 mm, a bottom curvature of 0.628 rad, and a bottom center thickness of 6.26 mm. Four aluminum alloy melts 100 of the same mass and composition were placed in the sampling mold 3, and the sampling mold 3 was placed in the following four environments: a natural environment, directly immersed in static cooling liquid, immersed in stirred cooling liquid, and placed in the cooling device of the embodiment. Cooling was performed in the four environments, and the cooling time was recorded. The aluminum alloy composition after cooling was detected, as shown in Figure 6 The detection points of the four samples were the same, and the experimental results obtained using a direct-reading spectrometer are shown in Tables 1-4.

[0037] Table 1: Sample composition analysis data of the sampling mold in natural cooling

[0038]

[0039] Table 2: Sample composition analysis data of the sampling mold immersed in static cooling liquid

[0040]

[0041] Table 3: Sample composition analysis data of the sampling mold immersed in stirred cooling liquid

[0042]

[0043] Table 4 Sample block composition analysis data of sample mold using the cooling device for spray cooling

[0044]

[0045] It can be seen that, compared with the other three cooling methods, the cooling speed of the cooling device described in the present application is faster, and the degree of composition segregation of the aluminum alloy sample block after cooling is smaller. Moreover, the method of immersing the outer wall of the sample mold 3 in the cooling water for cooling is difficult to implement in the molten aluminum production line, and there is a great risk of explosion.

[0046] Further, the nozzle 4 described in the present embodiment is replaced with a common round nozzle, and further spray experiments are carried out, and the experimental results are shown in Table 5.

[0047] Table 5 Sample block composition analysis data of sample mold using common round nozzle for spray cooling

[0048]

[0049] As can be seen from the comparative data of Tables 4 and 5, the sample block cooled by the common round nozzle has a longer cooling time because the cooling water does not completely cover it, and the cooling of the sample block is not uniform in some areas, resulting in a larger composition deviation.

[0050] It should be understood by those skilled in the art that the above discussion of any of the embodiments is only exemplary and is not intended to suggest that the scope of protection of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above. In order to be brief, they are not provided in detail.

[0051] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omissions, modifications, equivalent replacements, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A cooling device for an alloy melt, characterized in that, It includes nozzles (4) with their mouths facing the sampling mold (3) and evenly arranged around the sampling mold (3), wherein the sampling mold (3) contains alloy melt to be cooled; the cross-section of the nozzle (4) perpendicular to the liquid outlet direction is elongated, and the opening of the nozzle (4) gradually increases along the liquid outlet direction.

2. The cooling device as described in claim 1, characterized in that, The sampling mold (3) includes a bottom and a side wall, which together form a spoon shape, and the mouth of the nozzle (4) faces the side wall of the sampling mold (3).

3. The cooling device as described in claim 2, characterized in that, The number of nozzles (4) is 3-8.

4. The cooling device according to any one of claims 1-3, characterized in that, The number of nozzles (4) is 4, and the ratio of the length to the width of the elongated shape is 3:

1.

5. The cooling device according to any one of claims 1-3, characterized in that, The number of nozzles (4) is 4. The cross-section of the nozzles (4) is trapezoidal, with the long side of the trapezoid facing the sampling mold (3) and the slope of the trapezoid is 0.

6.

6. The cooling device according to any one of claims 1-3, characterized in that, The bottom of the sampling mold (3) is arc-shaped.

7. The cooling device according to any one of claims 1-3, characterized in that, It also includes a housing (1) for containing coolant, and a cooling port (12) for accommodating a sampling mold (3) is provided on the top of the housing (1). It also includes a refrigeration assembly (6) and a cooling pipe (2), and the refrigeration assembly (6) delivers the coolant through the cooling pipe (2) to the nozzle (4) for spraying.

8. The cooling device as claimed in claim 7, characterized in that, The cooling port (12) that accommodates the sampling mold (3) is truncated cone-shaped, with a small upper port diameter and a large lower port diameter.

9. The cooling device according to any one of claims 1-3, characterized in that, It also includes a handle (33), which is fixedly connected to the sampling mold (3).

10. The cooling device according to claim 9, characterized in that, The handle (33) also includes a hand guard (34), which is fixedly connected to the handle (33).

Images