Large valve casting casting device

Abstract

The large valve casting casting device comprises a workbench, a working plate is arranged above the workbench, and the two sides of the top end of the working plate are each provided with a pair of sliding bases. In the prior art, when molten metal in a casting furnace is poured into a pouring opening of a mold, distance control and rotation of a furnace body need to be considered, and once the control of the factors is not accurate, the molten metal in the casting furnace is prone to being sprayed out of the furnace body and the pouring opening of the mold; and on one hand, the valve casting efficiency of the device is reduced, and on the other hand, the problem that workers are scalded easily due to splashing of scattered molten metal is solved. The device has the advantages that the possibility that molten metal in the furnace body is sprayed out of the guide funnel is reduced, it is ensured that more molten metal flows into the guide funnel, the casting efficiency of the device is guaranteed, and meanwhile the safety of using the device by workers can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve casting, in particular to a large valve casting device. Background Art

[0002] Casting is a method of pouring liquid metal into a casting cavity that matches the shape of the part, and then cooling and solidifying it to obtain a part or blank. The cast material is mostly a metal that was originally solid but heated to a liquid state, and the material of the mold can be sand, metal or even ceramic. A casting device is needed when casting thick and large valve castings.

[0003] The patent number is "CN114918407A", and the patent name is "A large valve casting casting device". It uses a semi-automatic method to process the castings, which saves time and effort and is highly efficient. The staff can control the tilt and return of the casting furnace through the control component, which is easy to operate. The eddy current heating coil is used to heat the metal in the casting furnace. It has high heating efficiency and fast speed, can reduce surface oxidation, and the temperature is easier to control, and the accuracy of the casting process is improved.

[0004] However, the above-mentioned device is similar to the casting process of the prior art. When pouring the molten metal in the furnace into the pouring port of the mold, the casting furnace needs to consider the control of the distance and the rotation of the furnace body itself. Once the above factors are not controlled accurately, it is easy to cause the molten metal in the casting furnace to spray out of the furnace body and the pouring port of the mold. On the one hand, it will reduce the valve casting efficiency of the device itself. On the other hand, the spilled molten metal (which is of high temperature) splashes and easily cause burns to the staff.

[0005] In view of the above technical problems, the present invention discloses a large valve casting device, which has the advantages of reducing the possibility (probability) of the molten metal in the furnace body spraying out of the guide funnel, ensuring that the molten metal flows into the guide funnel more, thus ensuring the casting efficiency of the device itself, and also improving the safety of the staff using the device (avoiding scalding), etc. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a large-scale valve casting device to solve the problem that in the prior art, when the casting furnace pours the molten metal in the furnace into the pouring port of the mold, it is necessary to consider the control of the distance and the rotation of the furnace body itself. Once the above factors are not accurately controlled, it is easy to cause the molten metal in the casting furnace to spray out of the furnace body and the pouring port of the mold, on the one hand, it will reduce the valve casting efficiency of the device itself, and on the other hand, the splashing of the spilled molten metal can easily cause scalding to the staff. The present invention has the advantages of reducing the possibility of the molten metal in the furnace body spraying out of the guide funnel, ensuring that the molten metal flows into the guide funnel more, ensuring the casting efficiency of the device itself, and also improving the safety of the staff using the device.

[0007] The present invention is realized by the following technical scheme: The present invention discloses a large valve casting casting device, comprising a workbench, a work plate is arranged above the workbench, a pair of sliding seats are arranged on both sides of the top of the work plate, a sliding rod is fixedly arranged between each pair of the sliding seats, the sliding rod is slidably connected with a first sliding block, wherein a first cylinder fixedly connected to the corresponding first sliding block is arranged on the inner side of a pair of the sliding seats, a driving frame is fixedly connected to the first sliding block fixedly connected to the first cylinder, a first motor is arranged at the inner bottom end of the driving frame, and the first motor is fixedly connected to a threaded rod rotatably connected to the driving frame through its output end, The threaded rod is threadedly connected to a threaded block, a second motor is fixedly connected to the inner side of the threaded block, the second motor is fixedly connected to the furnace body through its output end, the outer wall of the furnace body is sleeved with a heating coil, a first pouring port is arranged at the front end of the furnace body, a guide frame is fixedly connected to the other pair of the first sliding blocks, a first guide rod is fixedly connected to the inside of the guide frame, the first guide rod is slidably connected to the first guide block, the first guide block is rotatably connected to the furnace body, a guide funnel is fixedly connected to the front end of the working plate, a second pouring port is arranged on the side of the guide funnel close to the furnace body, and a plurality of casting molds are equidistantly arranged below the guide funnel.

[0008] Furthermore, second guide blocks are symmetrically arranged on both sides of the threaded block, and the second guide blocks are slidably connected to second guide rods.

[0009] Furthermore, a second cylinder is provided on the top of the driving frame and the guide frame, and the second cylinder is fixedly connected to a driving plate via its output end, and the driving plate is fixedly connected to a furnace cover, and a third motor is fixedly provided at the top axis of the furnace cover, and the third motor is fixedly connected to a driving shaft via its output end, and the driving shaft is rotatably connected to the furnace cover, and a first stirring rod, a second stirring rod and a third stirring rod are circumferentially provided on the outer wall of the driving shaft from high to low, and the lengths of the first stirring rod, the second stirring rod and the third stirring rod decrease in sequence, and cleaning plates are provided at the ends of the first stirring rod, the second stirring rod and the third stirring rod, and a plurality of cleaning brushes are equidistantly provided on the outer wall of the cleaning plate.

[0010] Furthermore, fixed seats are symmetrically arranged on both sides of the front end of the working plate, and a plurality of fixed springs are equidistantly arranged inside the fixed seats, and each of the fixed springs is elastically connected to a fixed plate abutting against the outer wall of the guide funnel.

[0011] Furthermore, a first filter screen is arranged in parallel at the top of the inner cavity of the guide funnel, and a second filter screen is arranged in parallel at the bottom of the inner cavity of the guide funnel, and the mesh densities of the first filter screen and the second filter screen decrease in sequence.

[0012] Furthermore, buffer columns are provided at the four corners of the bottom end of the working plate, a buffer tube is provided below the buffer columns, a buffer hole slidably connected to the buffer column is opened at the top axis of the buffer tube, the buffer column slides through the buffer hole and extends to the inner cavity of the buffer tube and is fixedly connected to the buffer plate, buffer springs elastically connected to the buffer tube are equidistantly provided at the bottom end of the buffer plate, the bottom end of the buffer tube is fixedly connected to a support rod, and the bottom end of the support rod is fixedly connected to a support ring.

[0013] Furthermore, the casting mold includes a mold box, the inner cavity of the mold box is movably provided with a mold block, the mold block is provided with a mold cavity, a plurality of clamping springs are equidistantly provided on both sides of the inner wall of the mold box, the clamping springs are elastically connected with clamping plates abutting against the outer wall of the mold block, a placement cavity is provided on the bottom wall of the inner cavity of the mold box, and a condenser is provided inside the placement cavity.

[0014] Furthermore, a second sliding block is arranged at the bottom end of the mold box, and a sliding rail slidably connected to the second sliding block is arranged at the top middle end of the workbench.

[0015] The present invention has the following advantages: The present invention arranges the guide funnel to be fixed and designs the casting furnace body itself to be vertically liftable and horizontally slidable by arranging a driving frame, a sliding seat, a first pouring port and the like. The distance between the furnace body and the guide funnel can be adjusted according to the casting space and the environment. During specific implementation, the furnace body is adjusted to be close to the guide funnel and the furnace body is rotated to pour the molten metal in the furnace body into the guide funnel and fall into the mold cavity of the casting mold to complete the casting. In addition, corresponding pouring ports are respectively arranged on the furnace body and the guide funnel. The above mechanisms cooperate with each other to reduce the probability of the molten metal in the furnace body spraying out of the guide funnel, thereby ensuring that the molten metal flows into the guide funnel more, thereby ensuring the casting efficiency of the device itself, and at the same time improving the safety of the staff using the device to avoid scalding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 The enlarged schematic diagram at A in the middle; Figure 3 For the present invention Figure 1 Isometric structural diagram; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle; Figure 5 For the present invention Figure 3 The enlarged schematic diagram at C in the middle; Figure 6 For the present invention Figure 1 The enlarged schematic diagram at D in the middle; Figure 7 It is a schematic diagram of the furnace cover structure of the present invention; Figure 8 It is a schematic diagram of the guide funnel structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the buffer cylinder of the present invention; Fig.10 It is a schematic diagram of the casting mold structure of the present invention.

[0017] In the figure: 1, workbench; 2, work plate; 3, sliding seat; 4, sliding rod; 5, first sliding block; 6, first cylinder; 7, driving frame; 8, first motor; 9, threaded rod; 10, threaded block; 11, second motor; 12, furnace body; 13, heating coil; 14, first pouring port; 15, guide frame; 16, first guide rod; 17, first guide block; 18, guide funnel; 19, second pouring port; 20, second guide block; 21, second guide rod; 22, second cylinder; 23, driving plate; 24, furnace cover; 25, third motor; 26, driving shaft; 27. First stirring rod; 28. Second stirring rod; 29. ​​Third stirring rod; 30. Cleaning plate; 31. Cleaning brush; 32. Fixed seat; 33. Fixed spring; 34. Fixed plate; 35. First filter screen; 36. Second filter screen; 37. Buffer column; 38. Buffer cylinder; 39. Buffer hole; 40. Buffer plate; 41. Buffer spring; 42. Support rod; 43. Support ring; 44. Mold box; 45. Mold block; 46. Mold cavity; 47. Clamping spring; 48. Clamping plate; 49. Placement cavity; 50. Condenser; 51. Second sliding block; 52. Sliding rail. DETAILED DESCRIPTION

[0018] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] Example 1 Embodiment 1 discloses a large valve casting device, including a workbench 1 and a work plate 2 arranged on the top, such as Figure 1-Figure 10As shown, a pair of sliding seats 3 are provided on both sides of the top of the working plate 2, a sliding rod 4 is fixedly provided between each pair of sliding seats 3, and the sliding rod 4 is slidably connected to a first sliding block 5, wherein a first cylinder 6 fixedly connected to the corresponding first sliding block 5 is provided on the inner side of a pair of sliding seats 3, and a driving frame 7 is fixedly connected to the first sliding block 5 fixedly connected to the first cylinder 6, and a first motor 8 is provided at the inner bottom end of the driving frame 7, and the first motor 8 is fixedly connected to a threaded rod 9 rotatably connected to the driving frame 7 through its output end, and the threaded rod 9 is threadedly connected to a threaded block 10, and the inner side of the threaded block 10 is fixedly connected to a second electric The first motor 11 is fixedly connected to the furnace body 12 through its output end. The outer wall of the furnace body 12 is provided with a heating coil 13. The molten metal in the furnace body 12 can be heated at high temperature by the heating coil 13 to facilitate subsequent casting operations. The front end of the furnace body 12 is provided with a first pouring port 14. The other pair of first sliding blocks 5 are fixedly connected to a guide frame 15. The inside of the guide frame 15 is fixedly connected to a first guide rod 16. The first guide rod 16 is slidably connected to a first guide block 17. The first guide block 17 is rotatably connected to the furnace body 12. The front end of the working plate 2 is fixedly connected to a guide funnel 18. Figure 1-Figure 5 As shown, the present invention sets the guide funnel 18 to be fixed and designs the casting furnace body 12 itself to be vertically liftable and horizontally slidable. The distance between the furnace body 12 and the guide funnel 18 can be adjusted according to the casting space and environment. In specific implementation, the first cylinder 6 pushes the first sliding block 5 to slide horizontally along the sliding rod 4, and the furnace body 12 slides horizontally. The first motor 8 drives the threaded rod 9 to rotate, so that the threaded block 10 drives the furnace body 12 to move up and down in the vertical direction, and the height of the furnace body 12 is adjusted. The furnace body 12 is adjusted to be close to the guide funnel 18 through the above adjustment, and then the second motor 11 is controlled to drive the furnace body 12 to rotate, and the molten metal in the furnace body 12 is poured from the first pouring port 14 into the guide funnel 18 for subsequent casting operations; like Figure 1 , Figure 3 As shown, in this embodiment, a second pouring port 19 is provided on one side of the guide funnel 18 close to the furnace body 12, a plurality of casting molds are equidistantly provided below the guide funnel 18, and corresponding pouring ports are provided on the furnace body 12 and the guide funnel 18, respectively. The above mechanisms cooperate with each other to reduce the possibility (probability) of the molten metal in the furnace body 12 spraying out of the guide funnel 18, ensure that more molten metal flows into the guide funnel 18, ensure the casting efficiency of the device itself, and also improve the safety of the staff using the device (avoiding burns).

[0020] As a preferred embodiment of the present invention, preferably, Figure 4As shown, second guide blocks 20 are symmetrically arranged on both sides of the threaded block 10, and the second guide blocks 20 are slidably connected to the second guide rods 21. When the first motor 8 controls the threaded rod 9 to rotate and drive the threaded block 10 to vertically lift, in addition to the first guide block 17 sliding along the first guide rod 16 to guide it, the second guide block 20 in the guide frame 15 slides along the second guide rod 21 to also guide the movement of the threaded block 10, thereby improving the guiding effect of the movement of the threaded block 10 and further improving the stability of the lifting and lowering movement of the furnace body 12 driven by the threaded block 10.

[0021] As a preferred embodiment of the present invention, preferably, Figure 7 As shown, the top of the driving frame 7 and the guide frame 15 are both provided with a second cylinder 22, the second cylinder 22 is fixedly connected to a driving plate 23 through its output end, the driving plate 23 is fixedly connected to a furnace cover 24, a third motor 25 is fixedly provided at the top axis of the furnace cover 24, the third motor 25 is fixedly connected to a driving shaft 26 through its output end, the driving shaft 26 is rotatably connected to the furnace cover 24, and the outer wall of the driving shaft 26 is circumferentially provided with a first stirring rod 27, a second stirring rod 28 and a third stirring rod 29 in sequence from high to low, the lengths of the first stirring rod 27, the second stirring rod 28 and the third stirring rod 29 decrease in sequence, and the first stirring rod 27, the second stirring rod 28 and the third stirring rod 29 decrease in sequence. The ends of the stirring rod 28 and the third stirring rod 29 are both provided with cleaning plates 30, and the outer wall of the cleaning plate 30 is equidistantly provided with a plurality of cleaning brushes 31. When the molten metal is poured out of the furnace body 12 and left idle, the second cylinder 22 can be used to control the driving plate 23 to move up and down, so that the furnace cover 24 descends, and each stirring rod drives the cleaning plate 30 and the cleaning brush 31 to extend into the furnace body 12. When the furnace cover 24 completely covers the furnace body 12, the third motor 25 is turned on, and the third motor 25 drives the first stirring rod 27, the second stirring rod 28, and the third stirring rod 29 to rotate in a circle through the driving shaft 26, and the cleaning plate 30 and the cleaning brush 31 are used to wipe the inner wall of the furnace body 12 for cleaning.

[0022] As a preferred embodiment of the present invention, preferably, Figure 6 As shown, fixed seats 32 are symmetrically arranged on both sides of the front end of the working plate 2, and a number of fixed springs 33 are equidistantly arranged on the inner side of the fixed seats 32. Each fixed spring 33 is elastically connected to a fixed plate 34 abutting against the outer wall of the guide funnel 18. During specific implementation, the fixed plate 34 is pushed against the outer wall of the guide funnel 18 through the elastic expansion and contraction of the fixed springs 33 in the fixed seats 32, thereby clamping and fixing the guide funnel 18 to improve its stability during operation and avoid accidental loosening that affects the casting quality of the casting.

[0023] As a preferred embodiment of the present invention, preferably, Figure 8As shown, a first filter screen 35 is arranged in parallel to the top of the inner cavity of the guide funnel 18, and a second filter screen 36 is arranged in parallel to the bottom of the inner cavity of the guide funnel 18. The mesh densities of the first filter screen 35 and the second filter screen 36 decrease successively. When the molten metal poured out of the furnace body 12 falls into the guide funnel 18, with the gravitational potential energy of the molten metal itself, the molten metal passes through the first filter screen 35 and the second filter screen 36 in turn to filter itself layer by layer, filtering out the particulate matter, impurities and waste slag of the molten metal itself, thereby improving the purification rate of the molten metal and ensuring the casting quality of the device itself.

[0024] As a preferred embodiment of the present invention, preferably, Fig. 9 As shown, buffer columns 37 are provided at the four corners of the bottom end of the working plate 2, and a buffer cylinder 38 is provided below the buffer column 37. A buffer hole 39 slidably connected to the buffer column 37 is opened at the top axis of the buffer cylinder 38. The buffer column 37 slides through the buffer hole 39 to extend to the inner cavity of the buffer cylinder 38 and is fixedly connected to a buffer plate 40. Buffer springs 41 elastically connected to the buffer cylinder 38 are equidistantly provided at the bottom end of the buffer plate 40. A support rod 42 is fixedly connected to the bottom end of the buffer cylinder 38, and a support ring 43 is fixedly connected to the bottom end of the support rod 42. In specific implementation, the present invention can buffer and reduce the vibration generated by the movement of the furnace body 12 on the working plate 2 through the elastic expansion and contraction of the buffer spring 41 and the up and down sliding of the buffer plate 40 in the inner cavity of the buffer cylinder 38, thereby ensuring the overall working stability of the device, and using the support ring 43 and the support column to support and fix the working plate 2 to improve its support stability during operation.

[0025] As a preferred embodiment of the present invention, preferably, Fig.10 As shown, the casting mold includes a mold box 44, the inner cavity of the mold box 44 is movably provided with a mold block 45, and the mold block 45 is provided with a mold cavity 46. The mold cavity 46 can be adjusted according to the shape of the large valve casting to be processed (the drawings in the specification of the present invention are for reference only). The molten metal passes through the guide funnel 18 from the furnace body 12 and falls into the mold cavity 46 in the mold block 45 for casting. A plurality of clamping springs 47 are equidistantly provided on both sides of the inner wall of the mold box 44. The clamping springs 47 are elastically connected to a clamping plate 48 abutting against the outer wall of the mold block 45. The clamping springs 47 are used to clamp the mold plate 48. The elastic expansion and contraction of 7 pushes the clamping plate 48 against the mold box 44, thereby realizing the clamping and fixing of the mold block 45 by the mold box 44, and the clamping plate 48 can also be pushed aside to take the mold block 45 out of the mold box 44. A placement cavity 49 is provided on the bottom wall of the inner cavity of the mold box 44, and a condenser 50 is provided inside the placement cavity 49. During the casting process, due to the high temperature of the molten metal, it is quickly cooled by the condenser 50 in the placement cavity 49. Specifically, coolant is injected into the condenser 50 through an external pipeline to quickly cool the high-temperature molten metal in the mold cavity 46 after casting.

[0026] As a preferred embodiment of the present invention, preferably, Figure 1 , Figure 3 As shown, a second sliding block 51 is provided at the bottom end of the mold box 44, and a sliding rail 52 slidably connected to the second sliding block 51 is provided at the top middle end of the workbench 1. The sliding rail 52 is a prior art (similar to the sliding rail 52 with a built-in linear motor). The second sliding block 51 can slide in the sliding rail 52, thereby driving the die-casting mold above it to move synchronously, and cooperate with the guide funnel 18 and the furnace body 12 to realize the assembly line transportation + casting operation of the die-casting mold by the device.

[0027] The principle of the present invention is as follows: first, pour the molten metal into the furnace body 12 and turn on the heating coil 13 to heat the molten metal at high temperature, then turn on the first cylinder 6 to control the first sliding block 5 to slide horizontally along the sliding rod 4, thereby adjusting the horizontal distance of the furnace body 12, and at the same time turn on the first motor 8 to drive the threaded rod 9 to rotate. The rotation of the threaded rod 9 causes the threaded block 10 to drive the furnace body 12 to move vertically along the axis direction thereof, thereby adjusting the working height of the furnace body 12, and in addition turn on the second motor 11 to control the circular rotation of the furnace body 12. Through the above three movements of the furnace body 12, the furnace body 12 is made close to the guide funnel 18, and the molten metal is poured into the guide funnel 18 through the first pouring port 14, and then passes through the first filter screen 35 and the drip filter screen in the guide funnel 18 in turn to filter the molten metal layer by layer, and then the molten metal falls from the guide funnel 18 into the mold block 45 on the casting mold, and the mold cavity 46 in the mold block 45 can be adjusted according to the shape of the required large valve casting. The molten metal enters the mold cavity 46 in the mold block 45 for The die-casting casting work is performed, and due to the high temperature of the molten metal during the casting process, the condenser 50 in the cavity 49 is placed to quickly cool it, so as to facilitate the casting operation of the casting mold. In addition, through the sliding setting of the second sliding block 51 in the sliding rail 52, each required casting mold to be processed is placed in turn on the corresponding second sliding block 51. As the sliding rail 52 is opened, the second sliding block 51 and the die-casting mold are slid and transported on the sliding rail 52, so that the device as a whole can be used to transport the die-casting mold. In the assembly line casting operation, when the molten metal is poured out of the furnace body 12 and left idle, the second cylinder 22 can be used to control the driving plate 23 to move up and down, so that the furnace cover 24 descends, and each stirring rod drives the cleaning plate 30 and the cleaning brush 31 to extend into the furnace body 12. When the furnace cover 24 completely covers the furnace body 12, the third motor 25 is turned on, and the third motor 25 drives the first stirring rod 27, the second stirring rod 28, and the third stirring rod 29 to rotate in a circle through the driving shaft 26, and the cleaning plate 30 and the cleaning brush 31 wipe the inner wall of the furnace body 12 for cleaning.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A large valve casting device, comprising a workbench (1), characterized in that: A working plate (2) is arranged above the workbench (1), and a pair of sliding seats (3) are arranged on both sides of the top of the working plate (2), and a sliding rod (4) is fixedly arranged between each pair of the sliding seats (3), and the sliding rod (4) is slidably connected to a first sliding block (5), wherein a first cylinder (6) fixedly connected to the corresponding first sliding block (5) is arranged on the inner side of a pair of the sliding seats (3), and a driving frame (7) is fixedly connected to the first sliding block (5) fixedly connected to the first cylinder (6), and a first motor (8) is arranged at the inner bottom end of the driving frame (7), and the first motor (8) is fixedly connected to a threaded rod (9) rotatably connected to the driving frame (7) through its output end, and the threaded rod (9) is threadedly connected to a threaded block (10), and the inner side of the threaded block (10) is fixedly connected to A second motor (11), wherein the second motor (11) is fixedly connected to a furnace body (12) via an output end thereof, a heating coil (13) is sleeved on an outer wall of the furnace body (12), a first pouring port (14) is arranged at the front end of the furnace body (12), a guide frame (15) is fixedly connected to the other pair of the first sliding blocks (5), a first guide rod (16) is fixedly connected inside the guide frame (15), the first guide rod (16) is slidably connected to a first guide block (17), the first guide block (17) is rotatably connected to the furnace body (12), a guide hopper (18) is fixedly connected to the front end of the working plate (2), a second pouring port (19) is arranged on a side of the guide hopper (18) close to the furnace body (12), and a plurality of casting molds are equidistantly arranged below the guide hopper (18).

2. A large valve casting device as claimed in claim 1, characterized in that: Second guide blocks (20) are symmetrically arranged on both sides of the threaded block (10), and the second guide blocks (20) are slidably connected to second guide rods (21).

3. A large valve casting device as claimed in claim 2, characterized in that: A second cylinder (22) is provided at the top of each of the driving frame (7) and the guide frame (15); the second cylinder (22) is fixedly connected to a driving plate (23) via its output end; the driving plate (23) is fixedly connected to a furnace cover (24); a third motor (25) is fixedly provided at the top axis of the furnace cover (24); the third motor (25) is fixedly connected to a driving shaft (26) via its output end; the driving shaft (26) is rotatably connected to the furnace cover (24); a first stirring rod (27), a second stirring rod (28) and a third stirring rod (29) are circumferentially provided on the outer wall of the driving shaft (26) in sequence from high to low; the lengths of the first stirring rod (27), the second stirring rod (28) and the third stirring rod (29) are successively reduced; cleaning plates (30) are provided at the ends of the first stirring rod (27), the second stirring rod (28) and the third stirring rod (29); a plurality of cleaning brushes (31) are equidistantly provided on the outer wall of the cleaning plate (30).

4. A large valve casting device as claimed in claim 3, characterized in that: Fixed seats (32) are symmetrically arranged on both sides of the front end of the working plate (2), a plurality of fixed springs (33) are equidistantly arranged inside the fixed seats (32), and each of the fixed springs (33) is elastically connected to a fixed plate (34) abutting against the outer wall of the guide funnel (18).

5. A large valve casting device as claimed in claim 4, characterized in that: A first filter screen (35) is arranged in parallel at the top of the inner cavity of the guide funnel (18), and a second filter screen (36) is arranged in parallel at the bottom of the inner cavity of the guide funnel (18), wherein the mesh densities of the first filter screen (35) and the second filter screen (36) decrease in sequence.

6. A large valve casting device as claimed in claim 5, characterized in that: Buffer columns (37) are arranged at the four corners of the bottom end of the working plate (2), a buffer cylinder (38) is arranged below the buffer column (37), a buffer hole (39) slidably connected to the buffer column (37) is opened at the top axis of the buffer cylinder (38), the buffer column (37) slides through the buffer hole (39) and extends to the inner cavity of the buffer cylinder (38) and is fixedly connected to a buffer plate (40), a buffer spring (41) elastically connected to the buffer cylinder (38) is equidistantly arranged at the bottom end of the buffer plate (40), the bottom end of the buffer cylinder (38) is fixedly connected to a support rod (42), and the bottom end of the support rod (42) is fixedly connected to a support ring (43).

7. A large valve casting device as claimed in claim 6, characterized in that: The casting mold comprises a mold box (44), the inner cavity of the mold box (44) is movably provided with a mold block (45), the mold block (45) is provided with a mold cavity (46), a plurality of clamping springs (47) are equidistantly provided on both sides of the inner wall of the mold box (44), the clamping springs (47) are elastically connected to a clamping plate (48) abutting against the outer wall of the mold block (45), the inner cavity bottom wall of the mold box (44) is provided with a placement cavity (49), and a condenser (50) is provided inside the placement cavity (49).

8. A large valve casting device as claimed in claim 7, characterized in that: A second sliding block (51) is arranged at the bottom end of the mold box (44), and a sliding rail (52) slidably connected to the second sliding block (51) is arranged at the top middle end of the workbench (1).

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