A precision casting molding device and system for complex pump bodies

Abstract

The present invention relates to the field of casting technology, and specifically to a precision casting molding device and system for a complex pump body, comprising a first mold body and a second mold body, wherein a plurality of first cooling channels are provided inside the first mold body, and a plurality of second cooling channels are provided inside the second mold body, wherein a first L-shaped connecting pipe and a second L-shaped connecting pipe are fixedly installed inside the first mold body, and both ends of each of the first cooling channels are respectively connected to the inside of the first L-shaped connecting pipe and the second L-shaped connecting pipe, and a third L-shaped connecting pipe and a fourth L-shaped connecting pipe are fixedly installed inside the second mold body. In the process of circulating cooling, the present invention causes the flowing coolant to drive the fan blades to rotate, and when the eccentric block installed on the outside of the counterweight roller rotates, the first mold body and the second mold body will vibrate as a whole, thereby causing the molten iron to be shaken evenly, so that the bubbles in the molten iron will also escape from the pouring port under the vibration, thereby improving the quality of the casting.

Description

Technical Field

[0001] The invention relates to the technical field of casting and molding, and in particular to a precision casting and molding device and system for a complex pump body. Background Art

[0002] Casting is a metal heat processing technology that humans mastered relatively early. It is a method of pouring liquid metal into the cavity of a casting mold that is adapted to the shape of the part, and then cooling and solidifying it to obtain a part or blank. The most common production process for cooling water pumps is the casting process, such as the production of water pump housings. After the liquid metal is introduced into the casting mold, it takes a long time for it to cool naturally. There are also some existing molds that are cooled by liquid methods, and the casting is circulated and cooled by flowing coolant.

[0003] The prior art discloses a cooling device for casting a water pump casing with a publication number of CN114570883A, wherein a sewer is provided inside a lower die seat, and two male connectors are provided on the top of the lower die seat, which are respectively connected to the two ends of the sewer and cooperate with the female connector. The female connector and the male connector are both in a blocked state when in the plugged state, and are in a connected state after the male connector cooperates with the female connector. Thus, the present invention increases a cooling water channel inside the upper die seat, and ensures that the water channel of the upper die seat is connected with the water channel of the lower die seat, thereby realizing circulating cooling of the casting through one water channel. However, during use, due to the different thicknesses of various positions of the casting, the cooling time is also different. The thinner areas cool down quickly, while the thicker areas need to cool down for a longer time. The cooling water can only flow on a fixed path, and the flow direction cannot be distributed according to the actual temperature of the casting, which easily leads to uneven cooling and low cooling efficiency when the casting is cooled. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention proposes a precision casting molding device and system for a complex pump body.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A precision casting molding device for a complex pump body comprises a first mold body and a second mold body, wherein a plurality of first cooling channels are provided inside the first mold body, and a plurality of second cooling channels are provided inside the second mold body, and a first L-shaped connecting tube and a second L-shaped connecting tube are fixedly installed inside the first mold body, and both ends of each of the first cooling channels are respectively connected to the interior of the first L-shaped connecting tube and the second L-shaped connecting tube, and a third L-shaped connecting tube and a fourth L-shaped connecting tube are fixedly installed inside the second mold body, and both ends of each of the second cooling channels are respectively connected to the interior of the third L-shaped connecting tube and the fourth L-shaped connecting tube, and a plug is fixedly connected to the side of the first mold body close to the second mold body, and the plug is connected to the interior of the second L-shaped connecting tube, and a connector is installed inside the first mold body A socket is installed on the outer wall of the first mold body, and the socket is connected to the interior of the connecting head. A socket plugged with a plug is installed on the side of the second mold body close to the first mold body, and the socket is connected to the interior of the third L-shaped connecting pipe. A plug connected to the interior of the fourth L-shaped connecting pipe is fixedly connected to the outer wall of the second mold body. The second L-shaped connecting pipe is connected to the interior of the third L-shaped connecting pipe through the provided plug and socket, and the fourth L-shaped connecting pipe is connected to the interior of the connecting head through the provided plug and socket. A circulating water pump is fixedly connected to the outer wall of the first mold body, and the input end of the circulating water pump is connected to the interior of the connecting head, and the output end of the circulating water pump is connected to the interior of the first L-shaped connecting pipe. Adjustment mechanisms are installed inside the first cooling channel and the second cooling channel.

[0007] Preferably: the adjustment mechanism includes two counterweight rollers, the outer wall of each counterweight roller is fixedly connected to an eccentric block, one end of each counterweight roller is provided with an inner cavity, the inner wall of the inner cavity is rotatably connected to a rotating shaft, both ends of the counterweight roller are provided with fixed frames for mounting the counterweight roller, the fixed frames are rotatably connected to the counterweight rollers respectively, the fixed frames are fixedly connected to the rotating shaft, one end of the counterweight roller is fixedly connected to a fan blade, the end of the rotating shaft away from the counterweight roller is rotatably connected to an upper baffle and a lower baffle distributed up and down, and the end of the rotating shaft away from the counterweight roller is installed with a temperature change structure.

[0008] Preferably: the temperature change structure includes a storage chamber opened at the end of the rotating shaft, the interior of the storage chamber is filled with thermal expansion liquid, the inner wall of the storage chamber is slidably connected to a piston column, the end of the piston column is fixedly connected to a piston head, the end of the piston column away from the piston head is fixedly connected to a top block, and the outer wall of the top block is in conflict with the upper baffle and the lower baffle.

[0009] Preferably: two symmetrically distributed sliding cavities are provided on the outer side of the top block, a receiving groove is provided inside the sliding cavity, a U-shaped baffle is slidably connected to the inner wall of the sliding cavity, a spring is fixedly connected to the inner wall of the receiving groove, an end of the spring is fixedly connected to the outer wall of the U-shaped baffle, and the two U-shaped baffles respectively conflict with the outer walls of the upper baffle plate and the lower baffle plate.

[0010] Preferably, a liquid injection joint is fixedly connected to the outer wall of the first mold body, and the liquid injection joint is communicated with the interior of the first L-shaped connecting tube.

[0011] Preferably, a plurality of pins are fixedly connected to one side of the first mold body and the second mold body opposite to each other, and pin holes corresponding to the pins are formed on one side of the first mold body and the second mold body opposite to each other.

[0012] Preferably, the two counterweight rollers and the fan blades are symmetrically distributed, and the direction of the upper baffle on the counterweight roller is the same as the flow direction of the coolant.

[0013] A precision casting molding system for a complex pump body, the precision casting molding system for a complex pump body uses the precision casting molding device for a complex pump body as described above, and specifically comprises the following steps:

[0014] The first mold body and the second mold body are connected together by positioning the pin column and the pin hole, and the plugs and sockets on the first mold body and the second mold body are butted together, and coolant is injected from the injection joint; molten iron is poured from the pouring port, and the circulating water pump is started to pump the coolant from the connector to the inside of the first L-shaped connecting pipe, and the coolant flows through a plurality of first cooling channels to the inside of the second L-shaped connecting pipe, and is transported to the inside of the third L-shaped connecting pipe by the plug, and then flows through a plurality of second cooling channels to the inside of the fourth L-shaped connecting pipe, and finally is sent to the inside of the connector through the plug, thereby completing the circulation cooling of the coolant driven by the circulating water pump, and in the circulation cooling During the cooling process, the fan blades will be driven to rotate. The eccentric block installed on the outside of the counterweight roller will cause the first mold body and the second mold body to vibrate as a whole, prompting the molten iron to be shaken evenly under the vibration, so that the bubbles in the molten iron will escape from the pouring port under the vibration. In addition, when the casting is thinner in part and the cooling is completed quickly, the temperature of the fixed frame and the rotating shaft will also decrease, thereby causing the thermal expansion liquid inside the storage cavity to contract and drive the piston column to move into the storage cavity, so that the top block presses the upper baffle and the lower baffle, causing the upper baffle and the lower baffle to expand, reducing the flow of coolant flowing through this area, increasing the flow in other areas, and promoting the cooling of other molten iron that has not been cooled.

[0015] Compared with the existing technology, the present invention has the following beneficial effects:

[0016] 1. During the circulating cooling process, the flowing coolant will drive the fan blades to rotate. When the eccentric block installed outside the counterweight roller rotates, the first mold body and the second mold body will vibrate as a whole, so that the molten iron is shaken evenly under the vibration, and the bubbles in the molten iron will also escape from the pouring port under the vibration, thereby improving the quality of the casting;

[0017] 2. When the casting is thin in part and the cooling is completed quickly, the temperature of the fixing frame and the rotating shaft will also decrease, so that the heat expansion liquid in the storage cavity will shrink and drive the piston column to move into the storage cavity, so that the top block presses the upper baffle and the lower baffle, so that the upper baffle and the lower baffle are expanded, reducing the flow of coolant flowing through this area. The uncooled part of other areas transfers heat to the inside of the storage cavity through the fixing frame, causing the heat expansion liquid in the storage cavity to expand due to heat, so that the top block is away from the rotating shaft and no longer squeezes the upper baffle and the lower baffle, so that the coolant flows through this area without obstruction. A large amount of coolant flows through this area, promoting the cooling of other molten iron that has not been cooled, thereby improving the overall cooling effect and ensuring the uniform cooling of the overall temperature of the casting;

[0018] 3. The symmetrically arranged counterweight rollers and fan blades make the two fan blades rotate in opposite directions when the coolant flows through, and the counterweight rollers also rotate in opposite directions, causing the coolant to be stirred by the eccentric blocks rotating against each other, so that the temperature of the coolant is uniform and the heat of the casting is better taken away when it flows through. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention after being opened;

[0021] Figure 3 It is a schematic top view of the structure after the present invention is assembled;

[0022] Figure 4 The present invention Figure 3 Schematic diagram of the structural section at the AA line;

[0023] Figure 5 The present invention Figure 3 Schematic diagram of the structural section at the middle BB line;

[0024] Figure 6 is a schematic diagram of the flow direction of the internal coolant of the present invention;

[0025] Figure 7 is a schematic diagram of the adjustment mechanism of the present invention;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention;

[0027] Fig. 9 is a schematic cross-sectional view of the structure of the regulating mechanism of the present invention;

[0028] Fig.10 The present invention Fig. 9 Enlarged schematic diagram of the structure at C in the middle.

[0029] In the figure: 1, first mold body; 2, second mold body; 3, first cooling channel; 4, second cooling channel; 5, first L-shaped connecting pipe; 6, second L-shaped connecting pipe; 7, third L-shaped connecting pipe; 8, fourth L-shaped connecting pipe; 9, plug; 10, socket; 11, connector;

[0030] 12. Circulating water pump; 13. Adjusting mechanism; 14. Counterweight roller; 15. Inner cavity; 16. Rotating shaft;

[0031] 17. Fixed frame; 18. Fan blades; 19. Upper baffle plate; 20. Lower baffle plate; 21. Piston column;

[0032] 22. Piston head; 23. Sliding cavity; 24. U-shaped baffle; 25. Receiving groove; 26. Eccentric block; 27. Storage cavity; 28. Top block; 29. ​​Liquid injection joint; 30. Pin; 31. Pin hole; 32. Spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and 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.

[0035] Reference Figure 1 - Fig.10A precision casting molding device for a complex pump body comprises a first mold body 1 and a second mold body 2. A plurality of first cooling channels 3 are provided inside the first mold body 1, and a plurality of second cooling channels 4 are provided inside the second mold body 2. A first L-shaped connecting pipe 5 and a second L-shaped connecting pipe 6 are fixedly installed inside the first mold body 1. Both ends of each first cooling channel 3 are respectively connected to the inside of the first L-shaped connecting pipe 5 and the second L-shaped connecting pipe 6. A third L-shaped connecting pipe 7 and a fourth L-shaped connecting pipe 8 are fixedly installed inside the second mold body 2. Both ends of each second cooling channel 4 are respectively connected to the inside of the third L-shaped connecting pipe 7 and the fourth L-shaped connecting pipe 8. A plug 9 is fixedly connected to one side of the first mold body 1 close to the second mold body 2, and the plug 9 is connected to the interior of the second L-shaped connecting tube 6. A connector 11 is installed inside the first mold body 1, and a socket 10 is installed on the outer wall of the first mold body 1. The socket 10 is connected to the interior of the connector 11. A socket 10 plugged with the plug 9 is installed on one side of the second mold body 2 close to the first mold body 1, and the socket 10 is connected to the interior of the third L-shaped connecting tube 7. A plug 9 connected to the interior of the fourth L-shaped connecting tube 8 is fixedly connected to the outer wall of the second mold body 2. The second L-shaped connecting tube 6 is connected to the interior of the third L-shaped connecting tube 7 through the plug 9 and the socket 10. The four L-shaped connecting pipes 8 are connected to the interior of the connecting head 11 through the provided plug 9 and the socket 10. The outer wall of the first mold body 1 is fixedly connected with a circulating water pump 12. The input end of the circulating water pump 12 is connected to the interior of the connecting head 11. The output end of the circulating water pump 12 is connected to the interior of the first L-shaped connecting pipe 5. The first cooling channel 3 and the second cooling channel 4 are both installed with an adjustment mechanism 13. The first mold body 1 and the second mold body 2 are both fixedly connected to a plurality of pins 30 on the opposite side. The first mold body 1 and the second mold body 2 are both provided with pin holes 31 corresponding to the pins 30 on the opposite side. The first mold body 1 and the second mold body 2 are positioned so that the first mold body 1 and the second mold body 2 are fixedly connected to the inner side of the first mold body 1 and the second mold body 2. 1 and the second mold body 2 are connected together, and the plugs 9 and sockets 10 on the first mold body 1 and the second mold body 2 are butt-jointed together, and the coolant is injected from the injection joint 29; the molten iron is poured from the pouring port, and the circulating water pump 12 is started to pump the coolant from the connector 11 to the inside of the first L-shaped connecting pipe 5, and the coolant flows through the plurality of first cooling channels 3 to the inside of the second L-shaped connecting pipe 6, and is transported by the plug 9 to the inside of the third L-shaped connecting pipe 7, and then flows through the plurality of second cooling channels 4 to the inside of the fourth L-shaped connecting pipe 8, and finally is sent to the inside of the connector 11 through the plug 9, thereby completing the circulation cooling of the coolant driven by the circulating water pump 12.

[0036] In this embodiment, the adjustment mechanism 13 includes two counterweight rollers 14, the outer wall of each counterweight roller 14 is fixedly connected to an eccentric block 26, one end of each counterweight roller 14 is provided with an inner cavity 15, the inner wall of the inner cavity 15 is rotatably connected to a rotating shaft 16, both ends of the counterweight roller 14 are provided with a fixing frame 17 for mounting the counterweight roller 14, the fixing frames 17 are rotatably connected to the counterweight roller 14 respectively, the fixing frames 17 are fixedly connected to the rotating shaft 16, one end of the counterweight roller 14 is fixedly connected to a fan blade 18, the end of the rotating shaft 16 away from the counterweight roller 14 is rotatably connected to an upper baffle 19 and a lower baffle 20 distributed up and down, and the end of the rotating shaft 16 away from the counterweight roller 14 is installed with a temperature change structure, and the temperature change structure includes a temperature change structure provided at The storage chamber 27 at the end of the rotating shaft 16 is filled with a thermal expansion liquid, which is mercury or kerosene. The inner wall of the storage chamber 27 is slidably connected with a piston column 21, and the end of the piston column 21 is fixedly connected with a piston head 22. The end of the piston column 21 away from the piston head 22 is fixedly connected with a top block 28. The outer wall of the top block 28 is in conflict with the upper baffle 19 and the lower baffle 20. Two symmetrically distributed sliding chambers 23 are provided on the outer side of the top block 28. A receiving groove 25 is provided inside the sliding chamber 23. The inner wall of the sliding chamber 23 is slidably connected with a U-shaped baffle 24. The inner wall of the receiving groove 25 is fixedly connected with a spring 32. The end of the spring 32 is fixedly connected to the outer wall of the U-shaped baffle 24. The two U-shaped baffles 24 are respectively connected to the upper baffle 19 and the lower baffle 20. The outer wall of the first mold body 1 conflicts with the outer wall thereof, and the outer wall of the first mold body 1 is fixedly connected with a liquid injection joint 29, and the liquid injection joint 29 is communicated with the interior of the first L-shaped connecting pipe 5. During the circulating cooling process, the flowing coolant will drive the fan blades 18 to rotate, and the eccentric block 26 installed outside the counterweight roller 14 will make the first mold body 1 and the second mold body 2 vibrate as a whole when rotating, so as to make the molten iron shaken evenly under the vibration, and make the bubbles in the molten iron escape from the pouring port under the vibration, thereby improving the quality of the casting. In addition, due to the setting of the counterweight roller 14, the heavier counterweight roller 14 has a greater inertia when rotating, and provides a greater vibration after rotation to ensure that the molten iron is shaken evenly under the vibration. Since the casting is locally thin and the cooling is completed quickly, the fixed frame 17 and the rotating shaft 16 The temperature will also decrease, thereby causing the thermal expansion liquid in the storage chamber 27 to contract and drive the piston rod 21 to move into the storage chamber 27, so that the top block 28 presses the upper baffle 19 and the lower baffle 20, so that the upper baffle 19 and the lower baffle 20 are expanded, reducing the flow of coolant flowing through this area. The uncooled parts in other areas transfer heat to the inside of the storage chamber 27 through the fixed frame 17, causing the thermal expansion liquid in the storage chamber 27 to expand due to heat, so that the top block 28 is away from the rotating shaft 16 and no longer squeezes the upper baffle 19 and the lower baffle 20, so that the coolant flows through this area without obstruction. A large amount of coolant flows through this area, which promotes the cooling of other molten iron that has not been cooled, thereby improving the overall cooling effect and ensuring the uniform cooling of the overall temperature of the casting.

[0037] In this embodiment, the two counterweight rollers 14 and the fan blades 18 are symmetrically distributed, and the direction of the upper baffle 19 on the counterweight roller 14 is the same as the flow direction of the coolant. The symmetrically arranged counterweight rollers 14 and the fan blades 18 enable the two fan blades 18 to rotate in opposite directions when the coolant flows through, and the counterweight roller 14 also rotates in opposite directions, causing the flowing coolant to be stirred by the eccentric blocks 26 rotating against each other, so that the temperature of the coolant is uniform, and the heat of the casting is better taken away when it flows through.

[0038] Working principle: the first mold body 1 and the second mold body 2 are connected together by positioning the pin column 30 and the pin hole 31, and the plugs 9 and the sockets 10 on the first mold body 1 and the second mold body 2 are docked together, and the coolant is injected from the injection joint 29; the molten iron is poured from the pouring port, and the circulating water pump 12 is started to pump the coolant from the connector 11 to the inside of the first L-shaped connecting pipe 5, and the coolant flows through multiple first cooling channels 3 to the inside of the second L-shaped connecting pipe 6, and is transported by the plug 9 to the inside of the third L-shaped connecting pipe 7, and then flows through multiple second cooling channels 4 to the inside of the fourth L-shaped connecting pipe 8, and finally is sent to the inside of the connector 11 through the plug 9, so that the coolant is circulated and cooled under the drive of the circulating water pump 12. During the circulating cooling process, the flowing coolant will drive the fan blades 18 to rotate, and the eccentric block 26 installed outside the counterweight roller 14 will cause the first mold body 1 and the second mold body 2 to vibrate as a whole when rotating, so that the molten iron is shaken evenly under the vibration, so that the bubbles in the molten iron will also be shaken out under the vibration. The molten iron is evenly shaken due to the relatively thin local part of the casting and the rapid cooling. The temperature of the fixing frame 17 and the rotating shaft 16 will also decrease, thereby causing the thermal expansion liquid in the storage chamber 27 to contract and drive the piston column 21 to move into the storage chamber 27, so that the top block 28 presses the upper baffle plate 19 and the lower baffle plate 20, so that the upper baffle plate 19 and the lower baffle plate 20 are pressed. The plate 20 is unfolded to reduce the flow of coolant flowing through the area. The uncooled parts of other areas transfer heat to the inside of the storage cavity 27 through the fixed frame 17, causing the thermal expansion liquid in the storage cavity 27 to expand due to the heat, so that the top block 28 is away from the rotating shaft 16 and no longer squeezes the upper baffle plate 19 and the lower baffle plate 20, so that the coolant flows through the area without obstruction. A large amount of coolant flows through the area, which promotes the cooling of other molten iron that has not been cooled, thereby improving the overall cooling effect and ensuring the uniform cooling of the overall temperature of the casting.

[0039] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision casting molding device for a complex pump body, comprising a first mold body (1) and a second mold body (2), wherein the first mold body (1) is provided with a plurality of first cooling channels (3), and the second mold body (2) is provided with a plurality of second cooling channels (4), characterized in that: A first L-shaped connecting tube (5) and a second L-shaped connecting tube (6) are fixedly installed inside the first mold body (1), and both ends of each of the first cooling channels (3) are respectively connected to the inside of the first L-shaped connecting tube (5) and the second L-shaped connecting tube (6). A third L-shaped connecting tube (7) and a fourth L-shaped connecting tube (8) are fixedly installed inside the second mold body (2), and both ends of each of the second cooling channels (4) are respectively connected to the inside of the third L-shaped connecting tube (7) and the fourth L-shaped connecting tube (8). A plug (9) is fixedly connected to a side of the first mold body (1) close to the second mold body (2), and the plug (9) is connected to the inside of the second L-shaped connecting tube (6). A connector (11) is installed inside the first mold body (1), and a socket (10) is installed on the outer wall of the first mold body (1), and the socket (10) is connected to the inside of the connector (11). A socket (10) plugged with a plug (9) is installed on one side of the first mold body (1), and the socket (10) is connected to the interior of the third L-shaped connecting pipe (7). The outer wall of the second mold body (2) is fixedly connected to a plug (9) connected to the interior of a fourth L-shaped connecting pipe (8). The second L-shaped connecting pipe (6) is connected to the interior of the third L-shaped connecting pipe (7) through the provided plug (9) and the socket (10). The fourth L-shaped connecting pipe (8) is connected to the interior of a connector (11) through the provided plug (9) and the socket (10). A circulating water pump (12) is fixedly connected to the outer wall of the first mold body (1), and the input end of the circulating water pump (12) is connected to the interior of the connector (11). The output end of the circulating water pump (12) is connected to the interior of the first L-shaped connecting pipe (5). The first cooling channel (3) and the second cooling channel (4) are both installed with an adjustment mechanism (13). The adjustment mechanism (13) comprises two counterweight rollers (14), the outer wall of each counterweight roller (14) is fixedly connected to an eccentric block (26), one end of each counterweight roller (14) is provided with an inner cavity (15), the inner wall of the inner cavity (15) is rotatably connected to a rotating shaft (16), both ends of the counterweight roller (14) are provided with a fixing frame (17) for mounting the counterweight roller (14), the fixing frame (17) is rotatably connected to the counterweight roller (14) respectively, the fixing frame (17) is fixedly connected to the rotating shaft (16), one end of the counterweight roller (14) is fixedly connected to a fan blade (18), one end of the rotating shaft (16) away from the counterweight roller (14) is rotatably connected to an upper baffle plate (19) and a lower baffle plate (20) distributed up and down, and one end of the rotating shaft (16) away from the counterweight roller (14) is installed with a temperature change structure; The temperature change structure comprises a storage chamber (27) opened at the end of the rotating shaft (16), the interior of the storage chamber (27) is filled with a thermal expansion liquid, the inner wall of the storage chamber (27) is slidably connected to a piston column (21), the end of the piston column (21) is fixedly connected to a piston head (22), the end of the piston column (21) away from the piston head (22) is fixedly connected to a top block (28), and the outer wall of the top block (28) is in contact with the upper baffle plate (19) and the lower baffle plate (20); The outer side of the top block (28) is provided with two symmetrically distributed sliding cavities (23), the interior of the sliding cavity (23) is provided with a receiving groove (25), the inner wall of the sliding cavity (23) is slidably connected with a U-shaped baffle (24), the inner wall of the receiving groove (25) is fixedly connected with a spring (32), the end of the spring (32) is fixedly connected with the outer wall of the U-shaped baffle (24), and the two U-shaped baffles (24) are respectively in conflict with the outer walls of the upper baffle plate (19) and the lower baffle plate (20).

2. According to claim 1, a precision casting molding device for a complex pump body is characterized in that: The outer wall of the first mold body (1) is fixedly connected with a liquid injection joint (29), and the liquid injection joint (29) is connected to the interior of the first L-shaped connecting pipe (5).

3. The precision casting molding device for a complex pump body according to claim 1, characterized in that: A plurality of pins (30) are fixedly connected to one side of the first mold body (1) and the second mold body (2) opposite to each other, and pin holes (31) corresponding to the pins (30) are provided on one side of the first mold body (1) and the second mold body (2) opposite to each other.

4. The precision casting molding device for a complex pump body according to claim 1, characterized in that: The two counterweight rollers (14) and the fan blades (18) are symmetrically distributed, and the direction of the upper baffle (19) on the counterweight roller (14) is the same as the flow direction of the coolant.

5. A precision casting system for a complex pump body, characterized in that: The precision casting molding system of the complex pump body uses a precision casting molding device for a complex pump body as described in any one of claims 1 to 4, and specifically comprises the following steps: The first mold body (1) and the second mold body (2) are connected together by positioning the pin column (30) and the pin hole (31), and the plugs (9) and the sockets (10) on the first mold body (1) and the second mold body (2) are butted together, and the coolant is injected from the injection joint (29); the molten iron is poured from the pouring port, and the circulating water pump (12) is started to pump the coolant from the connector (11) to the inside of the first L-shaped connecting pipe (5); the coolant flows through a plurality of first cooling channels (3) to the inside of the second L-shaped connecting pipe (6), is transported by the plug (9) to the inside of the third L-shaped connecting pipe (7), flows through a plurality of second cooling channels (4) to the inside of the fourth L-shaped connecting pipe (8), and is finally transported to the inside of the connector (11) through the plug (9), thereby completing the circulation of the coolant driven by the circulating water pump (12). During the circulating cooling process, the fan blades (18) will be driven to rotate. When the eccentric block (26) installed outside the counterweight roller (14) rotates, the first mold body (1) and the second mold body (2) will vibrate as a whole, so that the molten iron is shaken evenly under the vibration, and the bubbles in the molten iron will also escape from the pouring port under the vibration. In addition, when the casting is thin in part and the cooling is completed quickly, the temperature of the fixed frame (17) and the rotating shaft (16) will also decrease, thereby causing the thermal expansion liquid inside the storage chamber (27) to contract and drive the piston column (21) to move into the storage chamber (27), so that the top block (28) presses the upper baffle plate (19) and the lower baffle plate (20), so that the upper baffle plate (19) and the lower baffle plate (20) are expanded, reducing the flow of coolant flowing through the area, increasing the flow in other areas, and promoting the cooling of other molten iron that has not been cooled.

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