Casting process for a ball valve casting

Abstract

This invention discloses a casting process for ball valve castings, belonging to the field of ball valve casting technology. In this process, after the brass alloy is melted into liquid, it is weighed and divided into equal portions to ensure that the raw material in each ball valve casting cavity remains uniform and consistent, reducing the possibility of inconsistent quality and improving overall quality. Furthermore, multiple portions of molten brass are simultaneously poured and cast, replacing the traditional sequential process, resulting in higher casting efficiency. This also reduces the impact of the brass liquid temperature decreasing over time, enhancing the casting effect. During the pouring process, a flow-guiding pouring mechanism guides the molten brass as it falls, while a horizontal filtration mechanism, through the horizontal movement of two circular filter plates moving apart or towards each other, not only stimulates heat transfer in the molten brass but also filters out internal air bubbles, ensuring quality and reducing interference. An attraction and cancellation mechanism attracts two streams of molten brass, causing them to impact each other rapidly, canceling out air bubbles and reducing residue, resulting in a more compact overall structure for the ball valve casting.

Description

Technical Field

[0001] This invention relates to the field of ball valve casting technology, and more specifically, to a casting process for ball valve castings. Background Technology

[0002] Ball valve body castings are produced by melting metal into a liquid that meets certain requirements, then pouring it into a casting cavity that conforms to the shape of the ball valve. After cooling and solidification, a ball valve blank is obtained. Casting is one of the fundamental processes in modern equipment manufacturing.

[0003] In most existing ball valve castings, molten liquid metal is poured sequentially into the cavities of each ball valve body mold. This results in the liquid metal content in the later cavities differing from that in the earlier ones, leading to unevenness, deviations, and variations in product quality. This also reduces casting efficiency. Furthermore, air is sometimes introduced during the liquid metal pouring process. Without proper treatment, this reduces the adhesion between the metal raw materials after the ball valve blank is formed, resulting in a loose overall structure and poor quality of the ball valve casting. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the present invention aims to provide a casting process for ball valve castings. This method involves melting brass alloy into a liquid, weighing it, and dividing it into equal portions. This ensures that the raw material within each ball valve casting cavity remains uniform and consistent, reducing the possibility of quality inconsistencies and improving overall quality. Furthermore, multiple portions of molten brass are simultaneously poured and cast, replacing the traditional sequential process, resulting in higher casting efficiency. This also reduces the impact of changes in the brass liquid temperature over time, enhancing the casting effect. During the pouring process, a guiding pouring mechanism ensures that each equal portion... The molten brass is guided into the space between the upper and lower mold cavities. The translational filtration mechanism, through the horizontal movement of two circular filter plates moving apart or towards each other, not only agitates the molten brass but also filters out air bubbles within it, ensuring the quality of the molten brass and reducing interference. The attraction and cancellation mechanism uses the attraction of magnetic balls to cause the two streams of molten brass to impact each other, canceling out air bubbles. This, combined with the filter screen, further removes air bubbles, reduces residue, and prevents a decrease in the bonding between brass alloys, resulting in a more compact overall structure for the ball valve casting and improved quality.

[0006] Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A casting process for a ball valve casting includes the following steps:

[0009] S1. Brass alloy material is used as the raw material for ball valves, and it is cut into small brass bars of the same size by cutting equipment. Then, it is added to a hot melt furnace to melt and form liquid brass.

[0010] S2. Take out the molten brass liquid, weigh it, divide it into portions of the amount of molten brass liquid required for the ball valve casting, and pour it into the ball valve casting cavity through the pouring device, so that the molten brass liquid is poured and formed evenly under micro-translation.

[0011] S3. After casting, the ball valve blank is cooled and shaped using cooling equipment. After shaping, the ball valve blank is placed on grinding equipment for grinding and polishing to remove defects.

[0012] S4. After grinding, the ball valve blank is immersed in a corrosion-resistant solution to form a corrosion-resistant coating on its surface. After immersion, it is dried and surface micro-treatment is performed to obtain the ball valve casting. In this scheme, after the brass alloy is melted into liquid, it is weighed and divided into equal portions to ensure that the raw material in each ball valve casting cavity remains uniform and consistent, reducing the possibility of inconsistent quality and improving its quality. Moreover, multiple portions of brass liquid are poured and cast simultaneously, replacing the traditional sequential processing, which increases casting efficiency and reduces the impact of the brass liquid temperature changing over time, thus enhancing the casting effect.

[0013] Furthermore, the brass alloy in S1 is made of a mixture of metallic copper, zinc, and small amounts of iron and manganese. The corrosion-resistant solution in S4 is made of a mixture of cellulose ether, acrylic monomer polymer, citric acid, methyl cyanide, epoxy resin, organotin additives, titanium boride ceramic powder, and aqueous solution. The corrosion-resistant layer formed by immersion in the corrosion-resistant solution can prevent the ball valve casting from corroding during subsequent use, thus extending its service life.

[0014] Furthermore, the pouring device in S2 includes a workbench with a mounting plate on its upper side. Multiple evenly distributed electric telescopic rods are fixedly connected between the mounting plate and the workbench. Multiple lower model cavities are located at the upper end of the workbench, and upper model cavities are located above the lower model cavities, in close contact with them. A flow guiding pouring mechanism is provided between the mounting plate and the lower model cavities. The flow guiding pouring mechanism has a translational flushing mechanism inside and a suction cancellation mechanism at its outer end. The pouring device uses the flow guiding pouring mechanism to pour each... Equal amounts of molten brass are channeled into the space between the upper and lower mold cavities. A horizontal filtration mechanism, through the opposing movement of two circular filter plates, not only agitates the molten brass but also filters out air bubbles, ensuring its quality and reducing interference. Furthermore, an attraction-cancellation mechanism uses magnetic balls to cause the two streams of molten brass to impact each other, canceling out air bubbles. This, combined with the filter screen, further removes air bubbles, reducing residue and preventing a decrease in the bonding between brass alloys. This results in a more compact overall structure for the ball valve casting, improving its quality.

[0015] Furthermore, the flow guiding and pouring mechanism includes multiple receiving cylinders embedded in the mounting plate. The lower end of each receiving cylinder is fixedly connected to two diversion pipes, both of which are connected to their interiors. The upper end of the upper mold cavity is fixedly connected to a sealing pipe, which is connected to the interior of the upper mold cavity. The left and right ends of the sealing pipe are respectively fixedly connected to the ends of the two diversion pipes that are close to each other, and both diversion pipes are connected to their interiors. The upper end of the receiving cylinder has an injection port, and the inside of the injection port is threaded with a sealing plug. After the sealing plug is unscrewed, the flow guiding and pouring mechanism guides the brass liquid into the receiving cylinder through the injection port. Then, it is dispersed into two streams of brass liquid through the two diversion pipes, and then they are combined again through the sealing pipe and poured between the upper mold cavity and the lower mold cavity, so that the shape of the brass liquid matches the shape between the upper mold cavity and the lower mold cavity. In this solution, the number of receiving cylinders matches the number of upper mold cavities and lower mold cavities, and they correspond one-to-one.

[0016] Furthermore, the translational filtration mechanism includes an internal frame installed inside the receiving cylinder. A dual-axis servo motor is installed inside the internal frame. Two threaded rods are rotatably connected inside the internal frame, and both threaded rods are fixedly connected to the output end of the dual-axis servo motor. A movable block is threaded to the outer end of each threaded rod, and a connecting rod is fixedly connected to the upper end of each movable block. An elastic stretching membrane is fixedly connected between each of the two connecting rods and the inner wall of the internal frame. A round-mouth filter plate is fixedly connected to the upper end of each of the two connecting rods. The translational filtration mechanism drives the dual-axis servo motor to rotate the two threaded rods in both directions, causing the two movable blocks to move horizontally apart or towards each other. This, in turn, causes the two round-mouth filter plates to move horizontally apart or towards each other with the assistance of the elastic stretching membrane via the connecting rods. This not only agitates the downward-flowing brass liquid, allowing heat to transfer and interact within it, preventing solidification, but also disperses the falling brass liquid into small streams, filtering out internal air bubbles and reducing interference.

[0017] Furthermore, each of the two movable blocks is equipped with a sliding wheel at its lower end, and both sliding wheels are slidably connected to the inner bottom of the built-in frame. The sliding wheels assist the movement of the movable blocks, ensuring that they maintain linear movement and are less prone to deviation.

[0018] Furthermore, the elastic stretch membrane is made of elastic polymer material, and both the inner frame and the outer end of the elastic stretch membrane are provided with a high-temperature resistant coating. By using the elastic stretch membrane made of elastic polymer material, it can move with the connecting rod through its elastic stretching action, ensuring sealing and preventing brass liquid from easily entering the inner frame. In addition, the high-temperature resistant coating makes the inner frame and the elastic stretch membrane less susceptible to high temperature, reducing the possibility of damage and extending their service life.

[0019] Furthermore, the attraction cancellation mechanism includes a connecting hemisphere fixedly connected to the upper end of the sealing tube. Multiple driving sealing flaps are installed and connected to the upper end of the connecting hemisphere, and these flaps are in close contact with each other. A magnetic ball is fixedly connected to the inner wall of the connecting hemisphere, and both the inner wall of the connecting hemisphere and the upper ends of the multiple driving sealing flaps are provided with an anti-magnetic layer. A filter screen is fixedly connected to the inner wall of the sealing tube. The attraction cancellation mechanism opens the connecting hemisphere by causing the multiple driving sealing flaps to bulge outwards, thus removing the anti-magnetic layer from its closed state and eliminating the magnetic shielding of the magnetic ball. The brass liquid contains a small amount of iron and manganese, giving it a certain degree of magnetism. Under the attraction of the magnetic ball, the two streams of brass liquid inside the two diversion tubes move rapidly downwards and collide with each other inside the sealing tube. Under the continuous impact of these collisions, the air bubbles inside the brass liquid are eliminated. Combined with the filter screen, residual air bubbles are filtered out, further enhancing the air bubble elimination effect and preventing a decrease in the bonding between the brass alloys. This makes the overall structure of the ball valve casting more compact and improves its quality.

[0020] Furthermore, the magnetic sphere is made of a single-sided magnet material, and the upper end of the magnetic sphere is the magnetic end. The magnetic shielding layer is made of Fe-Ni alloy material, and the Ni content in the magnetic shielding layer is 80%. By using a magnetic sphere made of a single-sided magnet material, one end is magnetic and the other end is not magnetic. The magnetic shielding layer made of Fe-Ni alloy material can effectively shield the magnetism of the magnetic sphere in a closed state.

[0021] 3. Beneficial Effects

[0022] Compared with the prior art, the advantages of this invention are:

[0023] (1) After the brass alloy is melted into liquid, it is weighed and divided into equal portions to ensure that the raw materials in each ball valve casting cavity remain uniform and consistent, reducing the possibility of inconsistent quality and improving its quality. In addition, multiple portions of brass liquid are poured and cast simultaneously, replacing the traditional sequential processing, which increases casting efficiency and also reduces the influence of the brass liquid temperature decreasing over time, thus enhancing the casting effect.

[0024] (2) The brass alloy in S1 is made of a mixture of metallic copper, zinc and a small amount of iron and manganese. The corrosion-resistant solution in S4 is made of a mixture of cellulose ether, acrylic monomer polymer, citric acid, methyl cyanide, epoxy resin, organotin additives and titanium boride ceramic powder and aqueous solution. The corrosion-resistant layer formed by immersion in the corrosion-resistant solution can prevent the ball valve casting from corroding during subsequent use and extend its service life.

[0025] (3) The casting device in S2 includes a workbench, an upper mounting plate, and multiple evenly distributed electric telescopic rods fixedly connected between the mounting plate and the workbench. Multiple lower mold cavities are located at the upper end of the workbench, and an upper mold cavity is located at the upper end of each lower mold cavity, with the upper mold cavity in close contact with it. A flow guiding and casting mechanism is located between the mounting plate and the lower mold cavities. A translational flushing mechanism is located inside the flow guiding and casting mechanism, and a suction and cancellation mechanism is located at the outer end of the flow guiding and casting mechanism. The casting device uses the flow guiding and casting mechanism to process each equal volume of brass liquid. The flow is guided to enter between the upper and lower mold cavities. The horizontal movement of the two circular filter plates, either moving apart or towards each other, not only agitates the molten brass but also filters out air bubbles inside, ensuring the quality of the molten brass and reducing interference. The attraction and cancellation mechanism uses the attraction of magnetic balls to make the two streams of molten brass impact each other, canceling out the air bubbles. This, combined with the filter screen, further removes air bubbles, reduces residue, and avoids reducing the adhesion between the brass alloys, making the overall structure of the ball valve casting more compact and improving its quality.

[0026] (4) The flow guiding and pouring mechanism includes multiple receiving cylinders embedded in the mounting plate. The lower end of the receiving cylinder is fixedly connected to two diversion pipes, and both diversion pipes are connected to its interior. The upper end of the upper model cavity is fixedly connected to a sealing pipe, and it is connected to the interior of the upper model cavity. The left and right ends of the sealing pipe are fixedly connected to the two diversion pipes that are close to each other, and both diversion pipes are connected to its interior. The upper end of the receiving cylinder is chiseled with an injection port, and the internal thread of the injection port is connected to a sealing plug. After the sealing plug is unscrewed, the flow guiding and pouring mechanism introduces brass liquid into the receiving cylinder through the injection port, and then disperses it into two streams of brass liquid through the two diversion pipes. Then, it is combined together through the sealing pipe and poured between the upper model cavity and the lower model cavity, so that the shape of the brass liquid matches the shape between the upper model cavity and the lower model cavity. In this scheme, the number of receiving cylinders matches the number of upper model cavities and lower model cavities, and they correspond one to one.

[0027] (5) The translational flushing mechanism includes an internal frame installed inside the receiving cylinder. A dual-axis servo motor is installed inside the internal frame. Two threaded rods are rotatably connected inside the internal frame, and both threaded rods are fixedly connected to the output end of the dual-axis servo motor. The outer end of the threaded rod is threadedly connected to a movable block, and the upper end of the movable block is fixedly connected to a connecting rod. An elastic stretching membrane is fixedly connected between the two connecting rods and the inner wall of the internal frame. A round-mouth filter plate is fixedly connected to the upper end of the two connecting rods. The translational flushing mechanism drives the dual-axis servo motor to drive the two threaded rods to rotate in the forward and reverse directions, causing the two movable blocks to move horizontally away from each other or towards each other. This causes the two round-mouth filter plates to move horizontally away from each other or towards each other through the connecting rods under the elastic stretching assistance of the elastic stretching membrane. This not only moves the downward flowing brass liquid, allowing the heat inside to transfer and interact with each other, making it less likely to solidify, but also disperses the falling brass liquid, dispersing it into small streams of brass liquid, filtering the bubbles inside and reducing interference.

[0028] (6) Both movable blocks are equipped with sliding wheels at their lower ends, and both sliding wheels are slidably connected to the inner bottom of the built-in frame. The sliding wheels are used to assist the movement of the movable blocks, so that they maintain linear movement and are not prone to deviation.

[0029] (7) The elastic stretch membrane is made of elastic polymer material. The inner frame and the outer end of the elastic stretch membrane are both provided with high temperature resistant coating. By using the elastic stretch membrane made of elastic polymer material, it can move with the connecting rod through its elastic stretching action, ensuring the sealing performance and making it difficult for brass liquid to enter the inner frame. In addition, the high temperature resistant coating makes the inner frame and the elastic stretch membrane less susceptible to high temperature, reducing the possibility of damage and extending their service life.

[0030] (8) The attraction and cancellation mechanism includes a connecting hemisphere fixedly connected to the upper end of the sealing tube. Multiple driving sealing flaps are installed and connected to the upper end of the connecting hemisphere, and the multiple driving sealing flaps are in close contact with each other. A magnetic ball is fixedly connected to the inner wall of the connecting hemisphere, and an antimagnetic layer is provided on the inner wall of the connecting hemisphere and the upper end of the multiple driving sealing flaps. A filter screen is fixedly connected to the inner wall of the sealing tube. The attraction and cancellation mechanism opens the connecting hemisphere by opening the multiple driving sealing flaps outward, so that the antimagnetic layer is no longer in a closed state, and the magnetic shielding of the magnetic ball is canceled. The brass liquid contains a small amount of iron and manganese and has a certain magnetism. Under the attraction of the magnetic ball, the two streams of brass liquid in the two diversion tubes move downward rapidly and collide with each other in the sealing tube. Under the continuous collision and impact, the bubbles in the brass liquid are canceled by the impact, and the filter screen is used to filter out the residual bubbles, further enhancing the bubble elimination effect, avoiding the reduction of the fit between the brass alloys, making the overall structure of the ball valve casting more compact and improving the quality.

[0031] (9) The magnetic ball is made of single-sided magnet material, and the upper end of the magnetic ball is the magnetic end. The magnetic insulation layer is made of Fe-Ni alloy material, and the Ni content in the magnetic insulation layer is 80%. The magnetic ball made of single-sided magnet material has one end of magnetism and one end of non-magnetism. The magnetic insulation layer made of Fe-Ni alloy material can effectively shield the magnetism of the magnetic ball in the closed state. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the casting device in this invention;

[0033] Figure 2 This is a partial cross-sectional structural diagram of the casting device in this invention;

[0034] Figure 3 This is a partial three-dimensional structural diagram of the flow guiding and pouring mechanism in this invention;

[0035] Figure 4 This is a schematic cross-sectional view of the translational flushing mechanism in this invention.

[0036] Figure 5 This is a three-dimensional structural diagram of the circular filter plate in this invention;

[0037] Figure 6 This is a partial cross-sectional schematic diagram of the attraction cancellation mechanism in this invention.

[0038] Explanation of the labels in the diagram:

[0039] 100. Workbench; 101. Lower model cavity; 102. Upper model cavity; 200. Mounting plate; 300. Electric telescopic rod; 400. Flow guiding and pouring mechanism; 401. Receiving cylinder; 402. Diverter pipe; 403. Sealing pipe; 404. Sealing plug; 500. Translational flushing mechanism; 501. Built-in frame; 502. Dual-axis servo motor; 503. Threaded rod; 504. Movable block; 5041. Sliding wheel; 505. Connecting rod; 506. Round-mouth filter plate; 507. Elastic telescopic membrane; 600. Suction cancellation mechanism; 601. Connecting hemisphere; 602. Driving sealing flap; 603. Magnetic ball; 604. Magnetic insulation layer; 605. Filter screen. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0043] A casting process for a ball valve casting includes the following steps:

[0044] S1. Brass alloy material is used as the raw material for ball valves, and it is cut into small brass bars of the same size by cutting equipment. Then, it is added to a hot melt furnace to melt and form liquid brass.

[0045] S2. Take out the molten brass liquid, weigh it, divide it into portions of the amount of molten brass liquid required for the ball valve casting, and pour it into the ball valve casting cavity through the pouring device, so that the molten brass liquid is poured and formed evenly under micro-translation.

[0046] S3. After casting, the ball valve blank is cooled and shaped using cooling equipment. After shaping, the ball valve blank is placed on grinding equipment for grinding and polishing to remove defects.

[0047] S4. After grinding, the ball valve blank is immersed in a corrosion-resistant solution to form a corrosion-resistant coating on its surface. After immersion, it is dried and surface micro-treatment is performed to obtain the ball valve casting. In this scheme, after the brass alloy is melted into liquid, it is weighed and divided into equal portions to ensure that the raw material in each ball valve casting cavity remains uniform and consistent, reducing the possibility of inconsistent quality and improving its quality. Moreover, multiple portions of brass liquid are poured and cast simultaneously, replacing the traditional sequential processing, which increases casting efficiency and reduces the impact of the brass liquid temperature changing over time, thus enhancing the casting effect.

[0048] The brass alloy in S1 is made from a mixture of metallic copper, zinc, and small amounts of iron and manganese. The corrosion-resistant solution in S4 is made from a mixture of cellulose ether, acrylic monomer polymer, citric acid, methyl cyanide, epoxy resin, organotin additives, titanium boride ceramic powder, and aqueous solution. The corrosion-resistant layer formed by immersion in the corrosion-resistant solution makes the ball valve castings less prone to corrosion during subsequent use, thus extending their service life.

[0049] Please see Figure 1-6 The casting device in S2 includes a workbench 100, with a mounting plate 200 on its upper side. Multiple evenly distributed electric telescopic rods 300 are fixedly connected between the mounting plate 200 and the workbench 100. Multiple lower mold cavities 101 are located at the upper end of the workbench 100, and upper mold cavities 102 are located at the upper end of each lower mold cavity 101, in close contact with the upper mold cavity 102. A flow guiding casting mechanism 400 is located between the mounting plate 200 and the lower mold cavities 101. The flow guiding casting mechanism 400 has a translational flushing mechanism 500 inside and a suction cancellation mechanism 600 at its outer end. The casting device uses the flow guiding mechanism for casting. Mechanism 400 guides each equal volume of molten brass into the space between the upper mold cavity 102 and the lower mold cavity 101. Meanwhile, the translational filtration mechanism 500, through the horizontal movement of two circular filter plates 506 (either separating or facing each other), not only agitates the molten brass but also filters out air bubbles, ensuring its quality and reducing interference. Furthermore, the attraction and cancellation mechanism 600 uses the attraction of magnetic balls 603 to cause the two streams of molten brass to impact each other, canceling out air bubbles. This, combined with the filter screen 605, further removes air bubbles, reduces residue, and prevents a decrease in the adhesion between brass alloy components. This results in a more compact overall structure for the ball valve casting, improving its quality.

[0050] Please see Figure 1-3The flow guiding and pouring mechanism 400 includes multiple receiving cylinders 401 embedded in the mounting plate 200. Two diversion pipes 402 are fixedly connected to the lower end of each receiving cylinder 401, and both diversion pipes 402 are connected to their interiors. A sealing pipe 403 is fixedly connected to the upper end of the upper model cavity 102, and it is connected to the interior of the upper model cavity 102. The left and right ends of the sealing pipe 403 are fixedly connected to the adjacent ends of the two diversion pipes 402, and both diversion pipes 402 are connected to their interiors. An injection port is cut into the upper end of each receiving cylinder 401, and the interior of the injection port... The threaded connection has a sealing plug 404. After the sealing plug 404 is unscrewed, the flow guiding and pouring mechanism 400 introduces the brass liquid into the receiving cylinder 401 through the injection port. Then, it is dispersed into two streams of brass liquid through two diversion pipes 402, and then combined together through the sealing pipe 403 and poured between the upper mold cavity 102 and the lower mold cavity 101. This makes the shape of the brass liquid match the shape of the upper mold cavity 102 and the lower mold cavity 101. In this solution, the number of receiving cylinders 401 matches the number of upper mold cavities 102 and lower mold cavities 101, and they correspond one-to-one.

[0051] Please see Figure 2 and Figure 4 The translational filtration mechanism 500 includes an internal frame 501 installed inside the receiving cylinder 401. A dual-axis servo motor 502 is installed inside the internal frame 501. Two threaded rods 503 are rotatably connected inside the internal frame 501, and both threaded rods 503 are fixedly connected to the output end of the dual-axis servo motor 502. A movable block 504 is threadedly connected to the outer end of each threaded rod 503, and a connecting rod 505 is fixedly connected to the upper end of the movable block 504. An elastic stretching membrane 507 is fixedly connected between each connecting rod 505 and the inner wall of the internal frame 501. An elastic stretching membrane 507 is fixedly connected to the upper end of each connecting rod 505. The circular filter plate 506 and the translational flushing mechanism 500 drive the two threaded rods 503 to rotate in opposite directions via the dual-axis servo motor 502. This causes the two movable blocks 504 to move horizontally apart or towards each other. This movement is facilitated by the connecting rod 505 and the elastic stretching membrane 507, which in turn causes the two circular filter plates 506 to move horizontally apart or towards each other. This not only agitates the downward-flowing brass liquid, allowing its internal heat to transfer and interact, making it less prone to solidification, but also disperses the falling brass liquid into small streams, filtering out internal air bubbles and reducing interference.

[0052] Please see Figure 4Both movable blocks 504 are equipped with sliding wheels 5041 at their lower ends, and both sliding wheels 5041 are slidably connected to the inner bottom end of the inner frame 501. The sliding wheels 5041 assist the movement of the movable blocks 504, keeping them in linear motion and preventing deviation. The elastic stretching membrane 507 is made of elastic polymer material. Both the inner frame 501 and the outer end of the elastic stretching membrane 507 are coated with a high-temperature resistant coating. By using the elastic stretching membrane 507 made of elastic polymer material, it can move with the connecting rod 505 through its elastic stretching action, ensuring sealing and preventing brass liquid from entering the inner frame 501. The high-temperature resistant coating makes the inner frame 501 and the elastic stretching membrane 507 less susceptible to high temperatures, reducing the possibility of damage and extending their service life.

[0053] Please see Figure 1-3 and Figure 6 The attraction cancellation mechanism 600 includes a connecting hemisphere 601 fixedly connected to the upper end of the sealing tube 403. Multiple driving sealing flaps 602 are mounted and connected to the upper end of the connecting hemisphere 601, and the multiple driving sealing flaps 602 are in close contact with each other. A magnetic ball 603 is fixedly connected to the inner wall of the connecting hemisphere 601, and both the inner wall of the connecting hemisphere 601 and the upper ends of the multiple driving sealing flaps 602 are provided with an anti-magnetic layer 604. A filter screen 605 is fixedly connected to the inner wall of the sealing tube 403. The attraction cancellation mechanism 600 opens the connecting hemisphere 601 by the outward expansion of the multiple driving sealing flaps 602. This process removes the magnetic shielding of the magnetic ball 603 from the sealed state of the non-magnetic layer 604. Since the brass liquid contains small amounts of iron and manganese, it possesses a certain degree of magnetism. Attracted by the magnetic ball 603, the two streams of brass liquid inside the two diversion pipes 402 move rapidly downwards and collide with each other within the sealed pipe 403. Under the continuous impact of these collisions, the air bubbles inside the brass liquid are eliminated. Combined with the filter screen 605, residual air bubbles are filtered out, further enhancing the bubble elimination effect and preventing a decrease in the bonding between the brass alloys. This results in a more compact overall structure for the ball valve casting, improving its quality.

[0054] Please see Figure 6 The magnetic ball 603 is made of a single-sided magnet material, and the upper end of the magnetic ball 603 is the magnetic end. The magnetic insulation layer 604 is made of Fe-Ni alloy material, and the Ni content in the magnetic insulation layer 604 is 80%. By using the magnetic ball 603 made of single-sided magnet material, one end is magnetic and the other end is not magnetic. The magnetic insulation layer 604 made of Fe-Ni alloy material can effectively shield the magnetism of the magnetic ball 603 in a closed state.

[0055] In this invention, when used by those skilled in the art, turning the sealing plug 404 opens the receiving cylinder 401, allowing the brass liquid to flow into the inlet receiving cylinder 401. Simultaneously, the dual-axis servo motor 502 is driven to operate, causing the two threaded rods 503 to rotate. This rotation causes the two movable blocks 504 to move away from each other, and the two connecting rods 505 also move away from each other. With the elastic stretching assistance of the elastic membrane 507, the two round-mouth filter plates 506 move apart. After reaching their extreme positions, the two threaded rods 503 of the dual-axis servo motor 502 rotate in opposite directions, causing the two movable blocks 504 to move the two round-mouth filter plates 506 towards each other. This process is repeated, and the repeated separation and repositioning of the two round-mouth filter plates 506 not only agitates the downward-flowing brass liquid but also reduces its internal heat. The interaction and transfer of the liquid brass prevents solidification and disperses the falling molten brass into small streams. A filter plate further filters out internal air bubbles, reducing interference. The molten brass then flows into two distribution pipes 402. Multiple driving sealing flaps 602 open outwards, opening the connecting hemisphere 601. This removes the magnetic shielding of the magnetic ball 603 from the magnetic insulating layer 604, causing the two streams of molten brass inside the two distribution pipes 402 to move rapidly downwards under magnetic attraction. They collide with each other within the sealing pipe 403. The continuous impact of these collisions neutralizes the air bubbles inside the molten brass, and the filter screen 605 removes any remaining bubbles. Finally, the molten brass flows through the sealing pipe 403 into the space between the upper mold cavity 102 and the lower mold cavity 101 for casting.

[0056] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A casting process for a ball valve casting, characterized in that: Includes the following steps: S1. Brass alloy material is used as the raw material for ball valves, and it is cut into small brass bars of the same size by cutting equipment. Then, it is added to a hot melt furnace to melt and form liquid brass. S2. Take out the molten brass liquid, weigh it, divide it into portions of the amount of molten brass liquid required for the ball valve casting, and pour it into the ball valve casting cavity through the pouring device, so that the molten brass liquid is poured and formed evenly under micro-translation. S3. After casting, the ball valve blank is cooled and shaped using cooling equipment. After shaping, the ball valve blank is placed on grinding equipment for grinding and polishing to remove defects. S4. After grinding, the ball valve blank is immersed in a corrosion-resistant solution to form a corrosion-resistant coating on its surface. After immersion, it is dried and surface micro-treatment is performed to obtain the ball valve casting. The brass alloy in S1 is made of a mixture of metallic copper, zinc, and small amounts of iron and manganese. The corrosion-resistant solution in S4 is made of a mixture of cellulose ether, acrylic monomer polymer, citric acid, methyl cyanide, epoxy resin, organotin additives, titanium boride ceramic powder, and an aqueous solution. The casting device in S2 includes a workbench (100), with a mounting plate (200) on the upper side of the workbench (100). Multiple evenly distributed electric telescopic rods (300) are fixedly connected between the mounting plate (200) and the workbench (100). Multiple lower mold cavities (101) are provided at the upper end of the workbench (100), and an upper mold cavity (102) is provided at the upper end of each lower mold cavity (101). The upper model cavity (102) is in close contact with the upper model cavity (101). A flow guiding and pouring mechanism (400) is provided between the mounting plate (200) and the lower model cavity (101). The flow guiding and pouring mechanism (400) is provided with a translational flushing mechanism (500) inside. The outer end of the flow guiding and pouring mechanism (400) is provided with a suction cancellation mechanism (600). The flow guiding and pouring mechanism (400) includes multiple receiving cylinders (401) embedded in the mounting plate (200). The lower end of the receiving cylinder (401) is fixedly connected to two diversion pipes (402), and both diversion pipes (402) are connected to its interior. The upper end of the upper model cavity (102) is fixedly connected to a sealing pipe (403), and it is connected to the upper model cavity (102). The internal components are interconnected. The left and right ends of the sealing tube (403) are fixedly connected to the close ends of the two diversion tubes (402), and both diversion tubes (402) are connected to its internal components. The upper end of the receiving cylinder (401) is chiseled with an injection port, and the internal thread of the injection port is connected to a sealing plug (404). The translational flushing mechanism (500) includes an internal frame (501) installed inside the receiving cylinder (401). A dual-axis servo motor (502) is installed inside the internal frame (501). Two threaded rods (503) are rotatably connected inside the internal frame (501), and both threaded rods (503) are fixedly connected to the output end of the dual-axis servo motor (502). The outer end of the rod (503) is threaded with a movable block (504), and the upper end of the movable block (504) is fixedly connected with a connecting rod (505). Both connecting rods (505) are fixedly connected to the inner wall of the inner frame (501) with an elastic stretching membrane (507). The upper ends of both connecting rods (505) are fixedly connected with a round-mouth filter plate (506). The lower ends of both movable blocks (504) are equipped with sliding wheels (5041), and both sliding wheels (5041) are slidably connected to the inner bottom end of the inner frame (501). The elastic stretching membrane (507) is made of elastic polymer material. The outer ends of the inner frame (501) and the elastic stretching membrane (507) are provided with a high-temperature resistant coating.

2. The casting process for a ball valve casting according to claim 1, characterized in that: The attraction cancellation mechanism (600) includes a connecting hemisphere (601) fixedly connected to the upper end of the sealing tube (403). Multiple driving sealing flaps (602) are installed and connected to the upper end of the connecting hemisphere (601), and the multiple driving sealing flaps (602) are in close contact with each other. A magnetic ball (603) is fixedly connected to the inner wall of the connecting hemisphere (601), and an antimagnetic layer (604) is provided on the inner wall of the connecting hemisphere (601) and the upper end of the multiple driving sealing flaps (602). A filter screen (605) is fixedly connected to the inner wall of the sealing tube (403).

3. The casting process for a ball valve casting according to claim 2, characterized in that: The magnetic ball (603) is made of single-sided magnet material, and the upper end of the magnetic ball (603) is the magnetic end. The magnetic insulation layer (604) is made of Fe-Ni alloy material, and the Ni content in the magnetic insulation layer (604) is 80%.

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