Dividing bag

Abstract

The utility model provides a flow dividing bag which comprises an inner bag, an outer bag and a flow dividing cover. The inner bag is provided with a first opening and is of a net-shaped structure, and the inner bag is used for filtering melt. The outer bag is provided with a second opening, the first opening and the second opening face the same direction, the inner bag is arranged in the outer bag, a plurality of first filtering openings are formed in the side wall of the end of the outer bag, a plurality of second filtering openings are formed in the bottom wall of the outer bag, and melt flowing out of the inner bag can enter the outer bag and flow out of the outer bag through the first filtering openings and the second filtering openings. The outer bag is provided with a flow guide structure to guide flow of the melt, so that the flow of the melt passing through the second filter opening is larger than that of the melt passing through the first filter opening. By means of the technical scheme, the problem that in the prior art, a flow dividing bag is poor in melt flowing property improving performance can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal casting, in particular to a diversion bag. Background Art

[0002] At present, in the ingot casting process of the alloy, a diverter bag is usually used to filter and divert the alloy melt so that the filtered melt can be diverted to the surface of the casting mold. The diverter bag in the prior art usually includes an inner bag and an outer bag. The inner bag is arranged inside the outer bag and is used to filter the melt once. The melt filtered by the inner bag can flow into the outer bag for secondary filtration and diversion.

[0003] However, in the process of casting large-scale alloy ingots, the cooling rate inside and outside the ingot is quite different, resulting in serious macro-segregation of the ingot. Macro-segregation is the phenomenon of uneven chemical composition in each macro-region of the alloy ingot, which will cause uneven structure and performance of the ingot. The scale of macro-segregation runs through the entire ingot and cannot be eliminated by subsequent processing and heat treatment. Therefore, macro-segregation is a permanent irreversible defect, which seriously affects the stability of product quality. The existing technology has outlets on the side wall and the bottom wall of the diverter bag, but the proportion of melt flowing out through the outlet on the bottom wall is small, which has limited improvement on the melt flow inside the ingot liquid cavity, and generally causes serious negative segregation in the core of the ingot. Utility Model Content

[0004] The utility model provides a diverter bag to solve the problem that the diverter bag in the prior art has poor performance in improving melt flow.

[0005] The utility model provides a diversion bag, which comprises: an inner bag, which has a first opening and is a mesh structure, and is used for filtering a melt; an outer bag, which has a second opening, and the first opening and the second opening are oriented in the same direction, and the inner bag is arranged in the outer bag, and a plurality of first filter ports are arranged on the side wall at the end of the outer bag, and a plurality of second filter ports are arranged on the bottom wall of the outer bag, and the melt flowing out of the inner bag can enter the outer bag and flow out of the outer bag through the first filter port and the second filter port, and the outer bag has a guide structure to guide the melt, so that the melt flow through the second filter port is greater than the melt flow through the first filter port.

[0006] Furthermore, two second filter ports are provided, and the two second filter ports are symmetrically located on both sides of the inner bag along the length direction of the outer bag, and the width of the bottom wall gradually decreases from the middle to the end of the outer bag.

[0007] Furthermore, the inner bag has two first side walls correspondingly arranged along the width direction and two second side walls correspondingly arranged along the length direction, and the mesh number of the first side wall is smaller than the mesh number of the second side wall.

[0008] Furthermore, the difference between the mesh number of the second side wall and the mesh number of the first side wall is between 1 and 4 meshes.

[0009] Furthermore, the width of the bottom wall at the midline extending in the width direction is L1, the width of the corresponding end portion of the bottom wall along the length direction is L2, and the ratio of L1 to L2 is between 1.2 and 2.

[0010] Furthermore, the outer bag has two third side walls correspondingly arranged along the width direction and two fourth side walls correspondingly arranged along the length direction, the first side wall is arranged corresponding to the third side wall, the second side wall is arranged corresponding to the fourth side wall, and the first filter port is arranged on the fourth side wall.

[0011] Furthermore, the length of the first side wall is L3, the distance between the two second filter ports is L4, and L3<L4.

[0012] Furthermore, the diameter of the second filter port is R1, the length of the fourth side wall is L2, and the ratio of R1 to L2 is between 0.3-0.5.

[0013] Furthermore, the distance between the center of the second filter port and the fourth side wall on the side of the second filter port away from the inner bag is L5, the length of the fourth side wall is L2, and the ratio of L5 to L2 is between 0.4-0.6.

[0014] Furthermore, the first opening and the second opening are arranged horizontally, the height H1 of the inner bag is smaller than the height H2 of the outer bag, and the value of H2-H1 is between 10-50 mm.

[0015] Applying the technical solution of the utility model, the diversion bag includes an inner bag and an outer bag. The metal melt during ingot casting will first enter the inner bag through the first opening, and be filtered for the first time through the mesh structure of the inner bag. The melt flowing out of the inner bag enters the outer bag, and is filtered and diverted for the second time through the first filter port and the second filter port to filter impurities in the melt and make the melt flow in a preset direction. After the melt enters the outer bag, under the diversion effect of the diversion structure, more of the melt will gather at the second filter port, causing local high pressure at the second filter port, forcing more melt to flow into the liquid cavity from the second filter port, so that the melt in the fluid liquid cavity of the first filter port and the second filter port will have a certain flow rate difference, forcing the melt inside the casting cavity of the crystallizer to flow, reducing the difference in cooling rate inside and outside the ingot, thereby reducing the influence of macro-segregation, improving the quality of metal ingots, and improving the performance of subsequent processed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the diversion bag provided by the utility model is shown;

[0018] Figure 2 The schematic diagram of the structure of the inner bag provided by the utility model is shown;

[0019] Figure 3 A top view of the diversion bag provided by the utility model is shown;

[0020] Figure 4 A bottom view of the diversion bag provided by the utility model is shown;

[0021] Figure 5 A cross-sectional view of the diversion bag provided by the utility model is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Inner bag;

[0024] 101. first side wall; 102. second side wall;

[0025] 20. Outer bag;

[0026] 201, bottom wall; 202, third side wall; 203, fourth side wall;

[0027] 21. First filter port; 22. Second filter port. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] like Figures 1 to 5As shown, the embodiment of the utility model provides a diverter bag, which includes an inner bag 10 and an outer bag 20. The inner bag 10 has a first opening, and the inner bag 10 is a mesh structure. The inner bag 10 is used to filter the melt, and the outer bag 20 has a second opening. The first opening and the second opening face the same direction. The inner bag 10 is arranged in the outer bag 20, and a plurality of first filter ports 21 are arranged on the side wall of the end of the outer bag 20, and a plurality of second filter ports 22 are arranged on the bottom wall 201 of the outer bag 20. The melt flowing out of the inner bag 10 can enter the outer bag 20 and flow out of the outer bag 20 through the first filter port 21 and the second filter port 22. The outer bag 20 has a diversion structure to divert the melt, so that the melt flow through the second filter port 22 is greater than the melt flow through the first filter port 21.

[0030] According to the technical solution of the utility model, the diversion bag includes an inner bag 10 and an outer bag 20. The metal melt during ingot casting will first enter the inner bag 10 through the first opening, and be filtered for the first time through the mesh structure of the inner bag 10. The melt flowing out of the inner bag 10 enters the outer bag 20, and is filtered and diverted for the second time through the first filter port 21 and the second filter port 22 to filter impurities in the melt and make the melt flow in a preset direction. After the melt enters the outer bag 20, under the diversion effect of the diversion structure, more of the melt will be gathered at the second filter port 22, causing local high pressure at the second filter port 22, forcing more melt to flow into the liquid cavity from the second filter port 22, so that the melt in the fluid liquid cavity of the first filter port 21 and the second filter port 22 will have a certain flow rate difference, forcing the melt inside the casting cavity of the crystallizer to flow, reducing the difference in cooling rate inside and outside the ingot, thereby reducing the influence of macro segregation, improving the quality of metal ingots, and improving the performance of subsequent processed products.

[0031] Specifically, two second filter ports 22 are provided, and the two second filter ports 22 are symmetrically located on both sides of the inner bag 10 along the length direction of the outer bag 20, and the width of the bottom wall 201 gradually decreases from the middle to the end of the outer bag 20. Through the above arrangement, when the melt flows in the outer bag 20, the side wall of the outer bag 20 cooperates with the bottom wall 201 to guide the melt, so that the melt generates a local high pressure at the second filter port 22 during the process of flowing out of the outer bag 20, thereby making the melt flow rate through the second filter port 22 greater than the melt flow rate through the first filter port 21.

[0032] Furthermore, the inner bag 10 has two first side walls 101 correspondingly arranged along the width direction and two second side walls 102 correspondingly arranged along the length direction, and the mesh number of the first side wall 101 is smaller than the mesh number of the second side wall 102. Through the above arrangement, the melt flow rate passing through the first side wall 101 per unit time can be greater than the melt flow rate passing through the second side wall 102, so that the melt can be more diverted through the bottom wall 201 and the side wall of the outer bag 20, further enhancing the effect of the diverter bag in improving the melt flow.

[0033] Specifically in the present application, the inner bag 10 and the outer bag 20 can be made of glass cloth.

[0034] Furthermore, the outer bag 20 except for the first filter opening 21 and the second filter opening 22 may be coated with a protective layer to prevent the melt from seeping out.

[0035] In the present application, the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 is between 1 and 4 meshes. When the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 is less than 1, the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 is too small, the adjustment effect on the melt flow rate is poor, and the effect of the first side wall 101 and the second side wall 102 causing the melt to flow out at different speeds cannot be achieved; when the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 is greater than 4, the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 is too large, although the adjustment effect on the melt flow rate is satisfied, it may cause the second side wall 102 to produce a large flow resistance to the melt, affecting the filtering efficiency of the inner bag 10. In the present application, by setting the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 to be between 1 and 4 meshes, it is possible to ensure the filtering effect and the circulation effect of the inner bag 10 while satisfying the effect of allowing more melt to flow out through the first side wall 101. Specifically, the difference between the mesh number of the second side wall 102 and the mesh number of the first side wall 101 can be set to 1 mesh, 2 meshes, 3 meshes or 4 meshes.

[0036] Reference Figure 3 As shown, the width of the bottom wall 201 at the midline extending in the width direction is L1, and the width of the corresponding end portion of the bottom wall 201 along the length direction is L2, and the ratio of L1 to L2 is between 1.2 and 2. When the ratio of L1 to L2 is less than 1.2, the width of the bottom wall 201 from the midline to the end portion changes slightly, and the flow effect of the melt in the outer bag 20 cannot be effectively improved, and the flow diversion effect on the melt is poor; when the ratio of L1 to L2 is greater than 1.2, the melt flow rate at the first filter port 21 will drop significantly, reducing the diversion effect of the diversion bag and affecting the performance of the diversion bag. In the present application, by setting the ratio of L1 to L2 between 1.2 and 2, the diversion effect of the bottom wall 201 can be guaranteed while ensuring the normal diversion effect of the diversion bag. Specifically, the ratio of L1 to L2 can be set to 1.2, 1.4, 1.6 or 2.

[0037] Furthermore, the outer bag 20 has two third side walls 202 correspondingly arranged along the width direction and two fourth side walls 203 correspondingly arranged along the length direction, the first side wall 101 is arranged corresponding to the third side wall 202, the second side wall 102 is arranged corresponding to the fourth side wall 203, and the first filter port 21 is arranged on the fourth side wall 203. Through the above arrangement, the melt flowing out through the first side wall 101 can flow to the connection between the third side wall 202 and the bottom wall 201, so that more melt can be further guided through the connection between the third side wall 202 and the bottom wall 201, further improving the guiding effect of the bottom wall 201, so as to improve the flow effect of the melt in the liquid cavity.

[0038] Reference Figure 3 As shown, the length of the first side wall 101 is L3, and the spacing between the two second filter ports 22 is L4, where L3<L4. When the length of the first side wall 101 is greater than or equal to the spacing between the two second filter ports 22, the two second filter ports 22 will be completely or partially located below the inner bag 10, so that part of the melt will flow directly to the second filter ports 22 and directly flow out of the outer bag 20 after flowing out of the inner bag 10, which will reduce the diversion effect of the diversion bag, and if the spacing between the two second filter ports 22 is too small, the local pressure of the melt at the second filter ports 22 will be reduced, reducing the improvement effect on the flow of the melt in the liquid cavity. By setting L3<L4, the diversion effect of the diversion bag and the effect of improving the flow of the melt can be further guaranteed.

[0039] Reference Figure 3 As shown, the diameter of the second filter port 22 is R1, the length of the fourth side wall 203 is L2, and the ratio of R1 to L2 is between 0.3-0.5. When the ratio of the diameter of the second filter port 22 to the length of the fourth side wall 203 is less than 0.3, the ratio of R1 to L2 is too small, and the diameter of the second filter port 22 is too small, which will increase the flow resistance of the second filter port 22 to the melt and affect the flow rate of the melt out of the diverter bag; when the ratio of the diameter of the second filter port 22 to the length of the fourth side wall 203 is greater than 0.5, the ratio of R1 to L2 is too large, and the diameter of the second filter port 22 is too large. Even if a guide structure is set to enable the melt to form a local high pressure at the second filter port 22, it is impossible to effectively increase the flow rate of the melt at the second filter port 22. In the present application, by setting the ratio of R1 to L2 to 0.3-0.5, it is possible to ensure that the melt at the second filter port 22 can have a large flow rate while ensuring the use effect of the diverter bag.

[0040] Reference Figure 4As shown, the distance between the center of the second filter port 22 and the fourth side wall 203 on the side of the second filter port 22 away from the inner bag 10 is L5, the length of the fourth side wall 203 is L2, and the ratio of L5 to L2 is between 0.4-0.6. When the ratio of L5 to L2 is less than 0.4, the second filter port 22 is too close to the fourth side wall 203, and the local high pressure generated by the melt at the second filter port 22 will cause part of the melt to be diverted to the first filter port 21, reducing the flow rate of the melt at the second filter port 22; when the ratio of L5 to L2 is greater than 0.6, the second filter port 22 is too far away from the fourth side wall 203, and after the guide structure guides the flow of the melt, the position where the local high pressure of the melt is generated does not correspond to the second filter port 22, which will affect the improvement effect of the diversion bag on the flow of the melt in the liquid cavity. By setting the ratio of L5 to L2 between 0.4-0.6, it can be ensured that the melt has a more suitable flow rate at the second filter port 22. Specifically, the ratio of L5 to L2 can be set to 0.4, 0.5 or 0.6.

[0041] In the present application, the first opening and the second opening are arranged horizontally, the height H1 of the inner bag 10 is less than the height H2 of the outer bag 20, and the value of H2-H1 is between 10-50mm. When the value of H2-H1 is less than 10mm, the bottom of the inner bag 10 is too close to the bottom wall 201, the volume of the outer bag 20 is small, and the diversion effect of the diversion bag is poor; when the value of H2-H1 is greater than 50mm, the distance between the bottom of the inner bag 10 and the bottom wall 201 is too large, the volume of the outer bag 20 is large, and the diversion effect of the bottom wall 201 and the side wall of the outer bag 20 is poor. In the present application, by setting the value of H2-H1 between 10-50mm, the diversion effect of the diversion bag can be guaranteed while ensuring the diversion effect of the diversion structure. Specifically, the value of H2-H1 can be set to 10mm, 30mm or 50mm.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0045] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0046] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A diversion bag, characterized in that: The diversion bag comprises: An inner bag (10) having a first opening, the inner bag (10) being a mesh structure, and the inner bag (10) being used for filtering the melt; The outer bag (20) has a second opening, the first opening and the second opening are oriented in the same direction, the inner bag (10) is arranged in the outer bag (20), a plurality of first filter ports (21) are arranged on the side wall at the end of the outer bag (20), and a plurality of second filter ports (22) are arranged on the bottom wall (201) of the outer bag (20), the melt flowing out of the inner bag (10) can enter the outer bag (20) and flow out of the outer bag (20) through the first filter port (21) and the second filter port (22), and the outer bag (20) has a guide structure to guide the melt, so that the melt flow rate through the second filter port (22) is greater than the melt flow rate through the first filter port (21).

2. The diversion bag according to claim 1, characterized in that: Two second filter ports (22) are provided, and the two second filter ports (22) are symmetrically located on both sides of the inner bag (10) along the length direction of the outer bag (20), and the width of the bottom wall (201) gradually decreases from the middle to the end of the outer bag (20).

3. The diversion bag according to claim 2, characterized in that: The inner bag (10) comprises two first side walls (101) correspondingly arranged along the width direction and two second side walls (102) correspondingly arranged along the length direction, and the mesh number of the first side wall (101) is smaller than the mesh number of the second side wall (102).

4. The diversion bag according to claim 3, characterized in that: The difference between the mesh number of the second side wall (102) and the mesh number of the first side wall (101) is between 1 and 4 meshes.

5. The diversion bag according to claim 2, characterized in that: The width of the bottom wall (201) at the midline extending in the width direction is L1, and the width of the corresponding end of the bottom wall (201) along the length direction is L2, and the ratio of L1 to L2 is between 1.2 and 2.

6. The diversion bag according to claim 3, characterized in that: The outer bag (20) has two third side walls (202) correspondingly arranged along the width direction and two fourth side walls (203) correspondingly arranged along the length direction, the first side wall (101) is arranged corresponding to the third side wall (202), the second side wall (102) is arranged corresponding to the fourth side wall (203), and the first filter port (21) is arranged on the fourth side wall (203).

7. The diversion bag according to claim 6, characterized in that: The length of the first side wall (101) is L3, the distance between the two second filter ports (22) is L4, and L3<L4.

8. The diversion bag according to claim 6, characterized in that: The diameter of the second filter port (22) is R1, the length of the fourth side wall (203) is L2, and the ratio of R1 to L2 is between 0.3 and 0.

5.

9. The diversion bag according to claim 6, characterized in that: The distance between the center of the second filter port (22) and the fourth side wall (203) on the side of the second filter port (22) away from the inner bag (10) is L5, the length of the fourth side wall (203) is L2, and the ratio of L5 to L2 is between 0.4 and 0.

6.

10. The diversion bag according to claim 2, characterized in that: The first opening and the second opening are arranged horizontally, the height H1 of the inner bag (10) is smaller than the height H2 of the outer bag (20), and the value of H2-H1 is between 10-50 mm.

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