High-strength anti-floating core body structure of valve body
By adopting a combined structure of main core bone and main ceramic tube in the valve body casting, the problem of difficulty in removing the core bone in the bending structure is solved, and the effect of high-strength and anti-flood core is achieved, and the quality and reusability of the casting are improved.
Patent Information
- Application Number
- CN202510352492.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-05-09
AI Technical Summary
During the casting process, the core bone of the through-hole structure with a bent structure is difficult to remove from the through-hole, resulting in damage to the casting and core floating.
A high-strength anti-floating core core structure is adopted for valve body, including the main core bone and the main ceramic tube. The main core bone is divided into the first and second main core bones, and is connected by a transitional ceramic tube. The ceramic tube sleeve is arranged outside the main core bone to form a stable core structure.
This structure improves the strength and rigidity of the core, can effectively resist buoyancy and impact during casting, avoid core drifting. At the same time, the ceramic tube will not fall off, can withstand high temperatures, and improve the quality of the casting.
Smart Images
Figure CN119952006A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of casting technology, and in particular relates to a high-strength anti-drifting core structure of a valve body used for casting. Background Art
[0002] For casting of workpieces with through holes, such as valve body castings, in order to form through holes during the casting process, it is necessary to assemble sand cores in the sand mold cavity. The sand cores are suspended in the cavity. After the casting is completed, the sand cores are taken out or broken, and the corresponding through hole structure is formed at the corresponding sand core position of the casting. However, since the molten iron will generate buoyancy and impact on the sand core during the casting process, the sand core position will be offset or broken, which will cause the floating core phenomenon, affecting the casting accuracy and even causing the casting to be scrapped.
[0003] In order to avoid the floating core phenomenon during casting, a core bone is added to the sand core structure to support the sand core and improve the strength of the sand core to solve the floating core phenomenon. However, the added core bone structure will make it difficult to remove the core bone after casting is completed. Violent removal can easily cause the core bone to damage the inside of the through hole of the casting. Especially for the through hole structure with a bent structure, the corresponding core bone also has a bent structure. Due to the existence of the bent structure, it is difficult to remove the core bone from the through hole after casting is completed. Summary of the invention
[0004] In order to solve the technical problem in the prior art that the core bone is difficult to remove from the through hole of a through hole structure casting with a bent structure, the present application provides a high-strength anti-drifting core structure of a valve body.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a high-strength anti-drifting core structure of a valve body, including a main core bone and a main ceramic tube, the main core bone at least includes a first main core bone and a second main core bone, the first main core bone and the second main core bone are separated from each other, the main ceramic tube includes a first main ceramic tube sleeved on the outside of the first main core bone and a second main ceramic tube sleeved on the outside of the second main core bone, the first main ceramic tube and the second main ceramic tube are connected by a transition ceramic tube, one end of the transition ceramic tube is sleeved on one end of the second main core bone, and the other end is sleeved on one end of the second main core bone.
[0006] In some embodiments, two ends of the transition ceramic tube are plug-connected to the first main ceramic tube and the second main ceramic tube respectively.
[0007] In some embodiments, the connection between the transition ceramic tube and the first main ceramic tube and the second main ceramic tube is filled and sealed with repair paste.
[0008] In some embodiments, the main core bone is provided with a plurality of support structures on the outside thereof which are supported on the inner wall of the main ceramic tube, and the support structures include a support seat connected to the main core bone and a pad installed on the support seat.
[0009] In some embodiments, a slide rail is provided along the axis of the main core bone at one end of the support seat away from the main core bone, a slide groove matching the slide rail is provided on the pad block, and a stop block is provided at one end of the support seat away from the transition ceramic tube.
[0010] Furthermore, in some embodiments, the support structure near the transition ceramic tube protrudes from the outside of the main ceramic tube, and the pad of the support structure is partially supported on the inner wall of the main ceramic tube and partially supported on the inner wall of the transition ceramic tube.
[0011] In some embodiments, at least one secondary core bone is further provided on one side of the main core bone, and the secondary core bone is detachably connected to the main core bone. A secondary ceramic tube is provided on the outside of the secondary core bone, and the supporting structure is also provided between the secondary core bone and the secondary ceramic tube. The main ceramic tube is provided with a connecting hole at a corresponding position of the secondary core bone, and the main ceramic tube and the secondary ceramic tube are integrated or detachably connected.
[0012] In some embodiments, when the main ceramic tube and the auxiliary ceramic tube are detachably connected, the connection between the main ceramic tube and the auxiliary ceramic tube is filled and sealed by a repair paste.
[0013] In some embodiments, the main core bone is provided with an insertion interface, and the secondary core bone is provided with a plug connector. The main core bone and the secondary core bone are plugged into each other through the insertion interface and the plug connector. The length of the insertion interface protruding from the main core bone is no greater than the width of the gap between the main ceramic tube and the main core bone.
[0014] In some embodiments, a limiting protrusion is provided on the plug interface, and a limiting groove corresponding to the limiting protrusion is provided on the plug connector.
[0015] In some embodiments, the plug interface is provided with the limiting protrusions in at least two directions, and in each direction, a connecting line of at least two limiting protrusions is not parallel to the direction.
[0016] Beneficial effects: The present invention replaces the original sand core structure by sleeved a main ceramic tube outside the main core bone, which has high strength and rigidity, can effectively resist the buoyancy and impact of the metal liquid on the core structure during the casting process, and avoid the floating core phenomenon. At the same time, the ceramic tube will not lose sand or become loose, and can withstand high temperature without breaking, which can effectively improve the quality of the casting.
[0017] In addition, the first main core bone and the second main core bone are separated from each other, and a transition ceramic tube is arranged between the separated first main core bone and the second main core bone, and the transition ceramic tube is arranged as a corresponding through-hole bending structure or other corresponding structures, which can not only effectively form the bending structure of the through-hole of the casting, but also there is no core bone inside the transition ceramic tube, and there is no problem that the core bone of the bending part in the through-hole cannot be taken out after the casting is completed. The first main core bone and the second main core bone can be reused, reducing the casting cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a cross-sectional view of the valve body casting structure;
[0019] Figure 2 It is a partial cross-sectional view of the core structure;
[0020] Figure 3 for Figure 2 A magnified view of the structure at center;
[0021] Figure 4 Schematic diagram of the three-dimensional structure of the first main core bone;
[0022] Figure 5 for Figure 4 A magnified view of the structure at center;
[0023] Figure 6 It is a cross-sectional view of the connection structure of the first main core bar, the auxiliary core bar, the main ceramic tube and the auxiliary ceramic tube;
[0024] Figure 7 for Figure 6 A magnified view of the structure at center;
[0025] Figure 8 Schematic diagram of the connection structure between the first main core bone and the auxiliary core bone;
[0026] Fig. 9 A schematic diagram of the three-dimensional structure of the connection structure of the first main core bone, the auxiliary core bone, the main ceramic tube and the auxiliary ceramic tube;
[0027] In the figure, 100. casting, 110. through hole, 120. branch through hole, 1. main core bone, 11. first main core bone, 12. second main core bone, 13. support seat, 131. slide rail, 14. cushion block, 141. slide groove, 15. stop block, 2. main ceramic tube, 21. first main ceramic tube, 211. plug interface, 212. limiting protrusion, 22. second main ceramic tube, 3. transition ceramic tube, 4. auxiliary core bone, 5. auxiliary ceramic tube, 6. positioning block. DETAILED DESCRIPTION
[0028] The present application will be further described below in conjunction with specific implementation methods. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative changes belong to the protection scope of the present application.
[0029] like Figure 1 As shown, the valve body casting 100 has a plurality of through holes 110 along its length direction, wherein one through hole 110 is composed of two straight holes and a bent hole between the two straight holes, the two adjacent ends of the straight holes are far apart, the bent hole transitionally connects the two straight holes, and the bent hole is roughly S-shaped. Due to the shape limitation, the use of a structure in which the core bone is wrapped inside a traditional sand core will result in the core bone being unable to be completely removed, and the inner wall of the through hole 110 will also be damaged when it is removed violently.
[0030] like Figure 2 As shown, in order to solve the above technical problems, the present application provides a valve body high-strength anti-drifting core structure, including a main core bone 1 and a main ceramic tube 2, the main core bone 1 includes at least a first main core bone 11 and a second main core bone 12, the first main core bone 11 and the second main core bone 12 are separated from each other, the main ceramic tube 2 includes a first main ceramic tube 21 sleeved on the outside of the first main core bone 11 and a second main ceramic tube 22 sleeved on the outside of the second main core bone 12, the first main ceramic tube 21 and the second main ceramic tube 22 are connected by a transition ceramic tube 3, one end of the transition ceramic tube 3 is sleeved on one end of the second main core bone 12, and the other end is sleeved on one end of the second main core bone 12.
[0031] like Figure 1 As shown, this solution changes the structure of the traditional sand core, sets a main ceramic tube 2 outside the main core bone 1, and combines them to form a new core structure, which is suitable for Figure 1Taking the core of the casting 100 as an example, the first main core bone 11 and the second main core bone 12 are separated from each other, and the first main core bone 11 and the second main core bone 12 are basically in a vertical state. The first main ceramic tube 21 and the second main ceramic tube 22 are respectively sleeved on the outside of the first main core bone 11 and the second main core bone 12, that is, the core body corresponding to the two straight holes of the casting 100 is formed, and the first main ceramic tube 21 and the second main ceramic tube 22 are connected by a transition ceramic tube 3, and the transition ceramic tube 3 is in a corresponding S shape, that is, the core body corresponding to the bent hole section of the casting 100 is formed, and the two ends of the transition ceramic tube 3 are respectively sleeved on one end of the first main core bone 11 and the second main core bone 12, and supported by the first main core bone 11 and the second main core bone 12. When in use, the ends of the first main core bone 11 and the second main core bone 12 away from the transition ceramic tube 3 are positioned and fixed to the sand mold, and then the core body is installed in the corresponding position of the sand mold cavity. In order to facilitate the positioning and fixing with the sand mold, a positioning block 6 can be set at one end of the first main core bone 11 and the second main core bone 12, and a corresponding positioning installation groove can be set on the sand mold. After the casting is completed, the first main core bone 11 and the second main core bone 12 can be directly pulled out from the two straight holes of the casting 100. Although the first main ceramic tube 21, the second main ceramic tube 22 and the transition ceramic tube 3 are retained in the through hole 110 of the casting 100, they can be crushed and discharged.
[0032] The structure has high strength and rigidity, and can effectively prevent the core from floating or loosening after impact. The ceramic tube will not cause sand to fall off, which is beneficial to improving the casting quality of the casting 100. The first main core bar 11 and the second main core bar 12 can also be smoothly separated from the through hole 110 of the casting 100 for reuse.
[0033] In order to facilitate the connection between the transition ceramic tube 3 and the first main ceramic tube 21 and the second main ceramic tube 22 and reduce the gap at the connection, the two ends of the transition ceramic tube 3 are plug-connected with the first main ceramic tube 21 and the second main ceramic tube 22 respectively. Figure 3 As shown, specifically, in this embodiment, the outer diameters of the first main ceramic tube 21 and the second main ceramic tube 22 at one end close to the transition ceramic tube 3 are reduced to form a step-shaped plug, and at the same time, the inner diameters of both ends of the transition ceramic tube 3 are increased to form a step-shaped jack to cooperate with the plug to achieve a plug-in connection, which can ensure the connection stability of the transition ceramic tube 3 and reduce the gap at the connection.
[0034] In order to improve the sealing of the connection, in this embodiment, the connection between the transition ceramic tube 3 and the first main ceramic tube 21 and the second main ceramic tube 22 is filled and sealed by a repair paste. The repair paste can fill the gap formed at the connection and play a sealing role to prevent the metal liquid from entering the main ceramic tube 2 through the gap.
[0035] In this embodiment, Figures 3 to 5As shown, the main core bone 1 is provided with a plurality of supporting structures on the inner wall of the main ceramic tube 2, and the supporting structures include a supporting seat 13 connected to the main core bone 1 and a pad 14 installed on the supporting seat 13. The pad 14 can be provided to support the inner wall of the main ceramic tube 2. On the one hand, the pad 14 can be provided as a profiling structure so that the top surface thereof fits the inner wall of the main ceramic tube 2, thereby playing a stable supporting role. On the other hand, the main core bone 1 can be isolated from the main ceramic tube 2, and the influence of the high casting temperature on the main core bone 1 can also be reduced, thereby increasing the service life of the main core bone 1. The pad 14 can be made of high temperature resistant ceramic material.
[0036] In order to facilitate the insertion and extraction of the main core bar 1 from the main ceramic tube 2, as an improved method, Figure 5 As shown, in this embodiment, the end of the support seat 13 away from the main core bone 1 is provided with a slide rail 131 arranged along the axial direction of the main core bone 1, the cushion block 14 is provided with a slide groove 141 matching the slide rail 131, and the end of the support seat 13 away from the transition ceramic tube 3 is provided with a stop block 15. During assembly, the cushion block 14 is installed on the support seat 13 through the slide rail 131 and the slide groove 141 structure. Since the slide rail 131 is arranged along the axial direction of the main core bone 1, when the main core bone 1 is inserted into the main ceramic tube 2 from the end of the main ceramic tube 2 away from the transition ceramic tube 3, due to the friction generated by the contact between the cushion block 14 and the inner wall of the main ceramic tube 2, one end of the cushion block 14 will move against the stop block 15, and the stop block 15 can prevent the cushion block 14 from detaching from the slide rail 131. After the insertion is completed, the main ceramic tube 2 is stably sleeved on the outside of the main core bone 1. After the casting is completed, when the main core bone 1 is pulled out from the inner cavity of the main ceramic tube 2, since the main ceramic tube 2 is wrapped by the casting 100, the main core bone 1 is moved outward. Due to the friction between the cushion block 14 and the main ceramic tube 2, if the friction is too large, the cushion block 14 will not move with the main core bone 1, and then detach from the slide rail 131 on the support seat 13. At this time, the main core bone 1 can be smoothly pulled out of the main ceramic tube 2 and can be reused.
[0037] like Figure 3 As shown, in order to facilitate the support of the transition ceramic tube 3, the support structure close to the transition ceramic tube 3 protrudes from the outside of the main ceramic tube 2, and the pad 14 of the support structure is partially supported on the inner wall of the main ceramic tube 2 and partially supported on the inner wall of the transition ceramic tube 3.
[0038] Some castings 100 have multiple pore structures, such as Figure 1 As shown, the valve body structure is also connected to two branch through holes 120 on one side of a through hole 110. In order to meet the casting requirements of the branch through holes 120, as shown in FIG. Figures 6 to 9As shown, in this embodiment, at least one secondary core bone 4 is also provided on one side of the main core bone 1, and the secondary core bone 4 is detachably connected to the main core bone 1, and the secondary core bone 4 is provided with a secondary ceramic tube 5 on the outside, and the supporting structure is also provided between the secondary core bone 4 and the secondary ceramic tube 5, and the main ceramic tube 2 is provided with a connecting hole at the corresponding position of the secondary core bone 4, and the main ceramic tube 2 and the secondary ceramic tube 5 are integrated or detachably connected. The secondary core bone 4 and the secondary ceramic tube 5 sleeved on the outside are provided at the position of the sand mold cavity corresponding to the branch through hole 120 of the casting 100, so as to form a corresponding cavity structure, as shown in the figure, one end of the secondary core bone 4 is detachably connected to the first main core bone 11, and the other end is positioned and installed on the sand mold through a positioning block 6 (not shown in the figure), so as to enable the secondary core bone 4 to be connected to the first main core bone 11 to improve the overall strength and rigidity of the core structure, and on the other hand, it is also convenient for the secondary core bone 4 to be pulled out from the secondary ceramic tube 5 after the casting is completed, and at the same time, it will not affect the main core bone 1 from being pulled out from the inside of the main ceramic tube 2. It is preferred to use an integrated structure between the main ceramic tube 2 and the auxiliary ceramic tube 5 to improve the structural integrity and reduce the connection gap. However, considering the cost, it is easier to manufacture the main ceramic tube 2 and the auxiliary ceramic tube 5 independently, and the two can be detachably connected by using the plug-in structure between the main ceramic tube 2 and the transition ceramic tube 3. When the main ceramic tube 2 and the auxiliary ceramic tube 5 are detachably connected, the connection between the main ceramic tube 2 and the auxiliary ceramic tube 5 is filled and sealed with a repair paste to reduce the gap and improve the casting quality.
[0039] In order to realize the detachable connection between the main core bar 1 and the auxiliary core bar 4, as Figure 7 and 8 As shown, in one embodiment, the main core bar 1 is provided with an insertion port 211, and the auxiliary core bar 4 is provided with an insertion joint, and the main core bar 1 and the auxiliary core bar 4 are plug-connected through the insertion port 211 and the insertion joint, and the length of the insertion port 211 protruding from the main core bar 1 is not greater than the width of the gap between the main ceramic tube 2 and the main core bar 1. As shown in the figure, the two can be effectively connected by the setting of the insertion port 211 and the insertion joint, and the matching or separation between the first main core bar 11 and the main ceramic tube 2 will not be affected.
[0040] As a further improvement, Figure 7 and 8 As shown, in this embodiment, a limiting protrusion 212 is provided on the plug port 211, and a limiting groove corresponding to the limiting protrusion 212 is provided on the plug connector. The setting of the limiting protrusion 212 and the limiting groove can effectively prevent the plug connector of the auxiliary core bar 4 from being excessively inserted into the plug port 211, play a limiting role, and also prevent the auxiliary core bar 4 from being easily separated from the main core bar 1.
[0041] like Figure 8As shown, in this embodiment, the structure of the above-mentioned limiting groove and limiting protrusion 212 is further optimized. Specifically, the plug-in port 211 is provided with the limiting protrusion 212 in at least two directions, and the connecting line of at least two limiting protrusions 212 in each direction is not parallel to the direction. The limiting protrusion 212 is provided in at least two directions to limit the auxiliary core bone 4 in multiple directions. As shown in the figure, the center lines of the four limiting protrusions 212 extend in the vertical direction, that is, parallel to the axis direction of the first main core bone 11 (only two are shown in the perspective of the figure, and the two limiting protrusions 212 are symmetrical structures), and the center lines of the four limiting protrusions 212 extend in the horizontal direction, that is, perpendicular to the axis direction of the first main core bone 11 (only two are shown in the perspective of the figure, and the two limiting protrusions 212 are symmetrical structures). The four limiting protrusions 212 extending in the vertical direction are divided into two groups, and the center lines of the two limiting protrusions 212 in each group coincide and pass through the axis of the plug-in port 211. The two groups of limiting protrusions 212 are arranged at intervals along the axis of the plug-in port 211; similarly, the four limiting protrusions 212 extending in the horizontal direction are also arranged accordingly. By setting the limiting protrusions 212 with a specific distribution structure, the secondary core 4 can be prevented from rotating and deviating in the plug-in port 211, thereby improving the assembly accuracy and the casting 100 accuracy.
[0042] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of this application.
Claims
1. A high-strength anti-drifting core structure of a valve body, characterized in that: The invention comprises a main core bone (1) and a main ceramic tube (2), wherein the main core bone (1) comprises at least a first main core bone (11) and a second main core bone (12), wherein the first main core bone (11) and the second main core bone (12) are separated from each other, and the main ceramic tube (2) comprises a first main ceramic tube (21) sleeved on the outside of the first main core bone (11) and a second main ceramic tube (22) sleeved on the outside of the second main core bone (12), wherein the first main ceramic tube (21) and the second main ceramic tube (22) are connected via a transition ceramic tube (3), wherein one end of the transition ceramic tube (3) is sleeved on one end of the second main core bone (12), and the other end is sleeved on one end of the second main core bone (12).
2. The high-strength anti-drifting core structure of the valve body according to claim 1 is characterized in that: The two ends of the transition ceramic tube (3) are plug-connected to the first main ceramic tube (21) and the second main ceramic tube (22) respectively.
3. The high-strength anti-drifting core structure of the valve body according to claim 1 or 2, characterized in that: The connection between the transition ceramic tube (3) and the first main ceramic tube (21) and the second main ceramic tube (22) is filled and sealed by repairing paste.
4. The high-strength anti-drifting core structure of the valve body according to claim 1, characterized in that: The main core bone (1) is provided with a plurality of support structures on the outside thereof to support the inner wall of the main ceramic tube (2), wherein the support structures include a support seat (13) connected to the main core bone (1) and a cushion block (14) installed on the support seat (13).
5. The high-strength anti-drifting core structure of the valve body according to claim 4, characterized in that: The end of the support seat (13) away from the main core bone (1) is provided with a slide rail (131) arranged axially along the main core bone (1), the cushion block (14) is provided with a slide groove (141) matching the slide rail (131), and the end of the support seat (13) away from the transition ceramic tube (3) is provided with a stop block (15).
6. The high-strength anti-drifting core structure of the valve body according to claim 4 or 5, characterized in that: The support structure close to the transition ceramic tube (3) protrudes from the outside of the main ceramic tube (2), and the pad (14) of the support structure is partially supported on the inner wall of the main ceramic tube (2) and partially supported on the inner wall of the transition ceramic tube (3).
7. The high-strength anti-drifting core structure of the valve body according to claim 4 or 5, characterized in that: At least one auxiliary core bone (4) is also provided on one side of the main core bone (1); the auxiliary core bone (4) is detachably connected to the main core bone (1); an auxiliary ceramic tube (5) is sleeved on the outside of the auxiliary core bone (4); the supporting structure is also provided between the auxiliary core bone (4) and the auxiliary ceramic tube (5); a connecting hole is provided on the main ceramic tube (2) at a position corresponding to the auxiliary core bone (4); and the main ceramic tube (2) and the auxiliary ceramic tube (5) are integrally or detachably connected.
8. The high-strength anti-drifting core structure of the valve body according to claim 7, characterized in that: The main core bar (1) is provided with an insertion port (211), and the auxiliary core bar (4) is provided with an insertion joint. The main core bar (1) and the auxiliary core bar (4) are plug-connected via the insertion port (211) and the insertion joint. The length of the insertion port (211) protruding from the main core bar (1) is not greater than the width of the gap between the main ceramic tube (2) and the main core bar (1).
9. The high-strength anti-drifting core structure of the valve body according to claim 8, characterized in that: The plug interface (211) is provided with a limiting protrusion (212), and the plug connector is provided with a limiting groove corresponding to the limiting protrusion (212).
10. The high-strength anti-drifting core structure of the valve body according to claim 9, characterized in that: The plug interface (211) is provided with the limiting protrusions (212) in at least two directions, and in each direction, the connecting line of at least two limiting protrusions (212) is not parallel to the direction.