A stainless steel impeller casting device and its process for nuclear power

Abstract

The present invention relates to the technical field of impeller casting, and discloses a stainless steel impeller casting device and process for nuclear power, including a casting unit, a cooling unit and a collection unit. The casting unit includes an installation base, support legs are fixedly installed around the bottom of the installation base, four support rods are fixedly installed above the installation base, the four support rods are symmetric with each other in pairs, a top plate is installed above the four support rods, a jack is arranged in the middle of the bottom of the top plate, a top mold is arranged at the bottom of the jack, and a workbench is also fixedly installed above the installation base. In the present invention, when the rotating part moves, it can also drive the moving rod to move vertically with the assistance of the positioning part. When the moving rod moves vertically, it can drive the inclined block to move vertically. Therefore, the inclined block can be separated from the placement slot opened in the filter plate, so that the impurities accumulated on the inclined block can fall off. At this time, the fallen impurities will just enter the circular fixed cylinder for collection.

Description

Technical Field

[0001] The present invention belongs to the technical field of impeller casting, and specifically relates to a stainless steel impeller casting device and process for nuclear power. Background Art

[0002] In today's energy pattern, nuclear power, as an efficient and low-carbon clean energy, occupies an increasingly crucial position. It provides stable power supply for many regions around the world and contributes to the vigorous development of social economy. The stainless steel impeller is an essential key moving part in many core systems of nuclear power plants. In the main cooling circulation system of a nuclear power plant, the impeller undertakes the important task of driving the cooling medium to circulate at high speed, ensuring that the nuclear reactor can be stably maintained within an appropriate working temperature range and avoiding potential safety hazards caused by overheating. For example, in a pressurized water reactor nuclear power plant, a large amount of heat needs to be removed from the reactor core. The stainless steel impeller drives the cooling water to flow through the core, absorbs the heat and then transfers it to the secondary loop system for power generation. The continuous and reliable operation of the impeller in this process is the cornerstone of the entire power generation process.

[0003] However, when casting existing stainless steel impellers, they are often cast through molds. But when the existing molds are used to cast stainless steel impellers, after casting and forming, rapid cooling is required. Considering dimensional accuracy, if not rapidly cooled, the impeller will undergo uneven shrinkage in the later stage of solidification. Due to inconsistent cooling rates in different parts, the thermal stress generated will cause the impeller to warp and deform, making it difficult to ensure the accuracy of the originally precisely designed blade shape and flow channel size. This directly affects the hydraulic performance of the impeller, greatly reducing the efficiency of the cooling circulation system and unable to meet the strict requirements of the nuclear power plant for parameters such as the flow rate and pressure of the cooling medium. Most of the existing rapid cooling is carried out through water cooling circulation. However, when water cooling is used, the water contains impurities, etc. In a heated environment, impurities and microorganisms in the coolant will diffuse, resulting in an increasing amount of impurities. When more impurities gather together, large impurities are likely to appear, which will adsorb on the inner wall of the pipeline, causing pipeline blockage. Therefore, when using the coolant for circulating cooling later, the cooling effect is likely to deteriorate.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A stainless steel impeller casting device for nuclear power plants, comprising a casting unit, a cooling unit and a collection unit. The casting unit includes a mounting base, with support legs fixedly installed around the bottom of the mounting base. Above the mounting base, four support rods are fixedly installed. The four support rods are symmetric with each other in pairs. Above the four support rods, a top plate is installed. In the middle of the bottom of the top plate, a jack is provided. Below the jack, an upper mold is provided. Above the mounting base, a workbench is also fixedly installed. Above the workbench, a lower mold is provided. A cavity is provided inside the lower mold, and a connecting pipe is provided inside the cavity. The bottom of the connecting pipe is hermetically connected to an installation cylinder. The bottom of the installation cylinder is hermetically connected to a water outlet pipe. The other end of the water outlet pipe is connected to a water tank. The water tank is arranged inside the cavity of the workbench. An inlet pipe is provided on the water tank. The other end of the inlet pipe is connected to the cavity of the lower mold. A water pump is provided on the inlet pipe. A sliding door is provided on the front side of the workbench. Four notches are provided on the side wall of the installation cylinder in a circumferential distribution. A filter plate is provided on the inner wall of the connecting pipe. The filter plate is in an inner conical shape. A placement notch is provided in the middle of the filter plate;

[0007] The collection unit includes four collection boxes, and the four collection boxes are respectively slidably and hermetically arranged inside the notches;

[0008] The cooling unit includes a driving component, which is used to drive the four collection boxes to move reciprocally. The driving unit can also be used to collect stains in the water.

[0009] As a preferred embodiment of the present invention, the driving component includes a hydraulic cylinder. Above the hydraulic cylinder, a rotating part is fixedly installed. Four connecting rods are rotatably arranged on the side wall of the rotating part in a circumferential distribution. On the opposite side walls of the four connecting rods, a circular mounting ring is installed. A telescopic protective cylinder is sleeved on the outer side wall of the hydraulic cylinder. The bottom of the telescopic protective cylinder is installed on the installation cylinder.

[0010] As a preferred embodiment of the present invention, a moving rod is rotatably installed above the rotating part. A positioning part is slidably arranged on the moving rod. Four positioning rods are fixedly installed on the side wall of the positioning part in a circumferential distribution. The opposite ends of the four positioning rods in pairs are respectively fixedly connected to the inner wall of the connecting pipe.

[0011] As a preferred embodiment of the present invention, four inclined blocks are fixedly installed on the side wall above the moving rod in a circumferential distribution. The four inclined blocks are hermetically arranged inside the placement notch. On the opposite side walls of the four inclined blocks in pairs, guide blocks are provided. The four guide blocks are in a circumferential distribution. The opposite ends of the four guide blocks in pairs are fixedly connected to the placement notch.

[0012] As a preferred embodiment of the present invention, four arc-shaped sliding grooves arranged in a circumferential distribution are provided above the circular mounting ring. A moving slider is slidably mounted in the inner cavity of each of the four arc-shaped sliding grooves. The four moving sliders are arranged in a circumferential distribution. Circular fixing cylinders are fixedly mounted above the four moving sliders. Expansion rods are fixedly mounted on the side walls of the four circular fixing cylinders. The four expansion rods are symmetric with each other in pairs. The other ends of the four expansion rods are respectively fixedly connected to the inner wall of the mounting cylinder.

[0013] As a preferred embodiment of the present invention, semi-circular notch openings are provided at the bottoms of the four circular fixing cylinders. Semi-circular inclined plates are fixedly mounted in the inner cavities of the four circular fixing cylinders. A blanking sealing mechanism is arranged in the inner cavities of the four circular fixing cylinders and the semi-circular notch openings.

[0014] As a preferred embodiment of the present invention, the blanking sealing mechanism includes four semi-circular turning plates. Rotating rods are fixedly mounted at both ends of the four semi-circular turning plates. Bearings are arranged at the opposite ends of each pair of the rotating rods. Each pair of the bearings is respectively arranged on the inner wall of the semi-circular notch opening. A torsion spring is arranged on each rotating rod. Both ends of each torsion spring are respectively arranged on the bearing and the opposite side wall of the semi-circular turning plate.

[0015] As a preferred embodiment of the present invention, a guiding sliding groove is provided on the inner wall of the mounting cylinder. A guiding slider is slidably mounted in the inner cavity of the guiding sliding groove. One end of the guiding slider away from the guiding sliding groove is fixedly connected to a connecting rod. The other end of the connecting rod away from the guiding slider is fixedly connected to the circular mounting ring.

[0016] As a preferred embodiment of the present invention, four rectangular notch openings arranged in a circumferential distribution are provided on the side wall of the telescopic protective cylinder. Moving rods are arranged in the inner cavities of the four rectangular notch openings. The four moving rods are symmetric with each other in pairs. One end of each of the four moving rods is movably connected to the hydraulic cylinder. The other ends of the four moving rods are respectively movably connected to the collection box.

[0017] A casting process for a stainless steel impeller used in nuclear power is as follows:

[0018] Step 1: First, the staff injects casting liquid into the lower mold. When the placement is completed, the staff controls the operation of the jack through the controller. Therefore, the jack can drive the upper mold to move, so that the upper mold and the lower mold are sealed with each other. At this time, the heating component and the like are controlled by the controller to heat it, so as to complete the forming of the stainless steel impeller.

[0019] Step 2: After the stainless steel impeller is formed, the operator controls the water pump to run through the controller, so that the water pump can extract the coolant from the water tank. Therefore, the coolant can enter the lower die cavity through the water inlet pipe, and then the coolant cools the stainless steel impeller formed in the lower die. The coolant can be recycled through the connecting pipe, the installation cylinder, the water outlet pipe and the condenser, thus ensuring the cooling efficiency of the stainless steel impeller cast in the lower die. When the cooling is completed, the water pump stops running, so that the coolant can return to the water tank;

[0020] Step 3: At the same time, when the cooling is completed, the operator makes the cooling unit run through the controller, so that the impurities remaining on the filter plate in the coolant can be cleaned, and the dust can fall into the collection unit. At the same time, when the cooling unit runs to a certain extent and the collection box is located on the outer wall of the installation cylinder, the operator can process the dust stored in the collection box last time by opening the sliding door.

[0021] The present invention has the following beneficial effects compared with the prior art:

[0022] In the present invention, when the rotating part moves, it can also drive the moving rod to move vertically with the assistance of the positioning part. When the moving rod moves vertically, it can drive the inclined block to move vertically. Therefore, the inclined block can open the placement slot opened in the middle of the filter plate, so that the impurities accumulated on the inclined block can fall off. At this time, the fallen impurities will just enter the circular fixing cylinder for collection. When the hydraulic cylinder moves in the reverse direction, the above-mentioned circular fixing cylinder and the inclined block will slowly reset. At this time, the semi-circular turning plate arranged at the circular fixing cylinder will be able to turn under the torque force of the torsion spring, so that the dust falling into the circular fixing cylinder can fall from the semi-circular slot into the collection box reset below for collection.

[0023] The following further describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. Description of the Drawings

[0024] In the drawings:

[0025] Figure 1 is a three-dimensional structural schematic diagram of a stainless steel impeller casting device for nuclear power;

[0026] Figure 2 is a cross-sectional structural schematic diagram of a stainless steel impeller casting device for nuclear power;

[0027] Figure 3 is a structural schematic diagram of the inner cavity of the workbench of a stainless steel impeller casting device for nuclear power;

[0028] Figure 4 Schematic structural diagram of the installation cylinder of a stainless steel impeller casting device for nuclear power

[0029] Figure 5 Schematic sectional view structural diagram of the connecting pipe of a stainless steel impeller casting device for nuclear power

[0030] Figure 6 Schematic sectional and top view structural diagram of the installation cylinder of a stainless steel impeller casting device for nuclear power

[0031] Figure 7 Schematic partial structural diagram of the inner cavity of the installation cylinder of a stainless steel impeller casting device for nuclear power

[0032] Figure 8 Schematic partial bottom view structural diagram of the inner cavity of the installation cylinder of a stainless steel impeller casting device for nuclear power

[0033] Figure 9 Schematic bottom view structural diagram of the inner cavity of the installation cylinder of a stainless steel impeller casting device for nuclear power

[0034] Figure 10 Schematic structural diagram of the semi - circular turning plate of a stainless steel impeller casting device for nuclear power

[0035] In the figure:

[0036] 100, casting unit; 101, installation base; 1011, support leg; 1012, support rod; 1013, top plate; 1014, jack; 1015, workbench; 1016, sliding door; 102, lower mold; 1021, upper mold; 103, water tank; 1031, water outlet pipe; 1032, water inlet pipe; 1033, water pump; 104, installation cylinder; 1041, connecting pipe; 105, telescopic protective cylinder; 1051, rectangular notch; 106, filter plate;

[0037] 200, cooling unit; 201, hydraulic cylinder; 2011, rotating part; 2012, connecting rod; 2013, circular mounting ring; 2014, moving rod; 2015, positioning rod; 2016, positioning part; 2017, inclined block; 2018, guide block; 202, arc - shaped chute; 2021, moving slider; 2023, circular fixed cylinder; 2024, semi - circular notch; 2025, semi - circular inclined plate; 2026, telescopic rod; 203, semi - circular turning plate; 2031, rotating rod; 2032, bearing; 2033, torsion spring; 204, guide chute; 2041, guide slider; 2042, connecting rod;

[0038] 300, collection unit; 301, collection box; 3011, movable rod. Specific implementation method

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0040] Embodiment 1:

[0041] As Figures 1 to 10As shown in the figure, a stainless steel impeller casting device for nuclear power plants includes a casting unit 100, a cooling unit 200, and a collection unit 300. The casting unit 100 includes a mounting base 101. Four support legs 1011 are fixedly installed around the bottom of the mounting base 101. Four support rods 1012 are fixedly installed above the mounting base 101. The four support rods 1012 are symmetric with each other in pairs. A top plate 1013 is installed above the four support rods 1012. A jack 1014 is arranged in the middle of the bottom of the top plate 1013. An upper mold 1021 is arranged at the bottom of the jack 1014. A workbench 1015 is also fixedly installed above the mounting base 101. A lower mold 102 is arranged above the workbench 1015. A cavity is arranged in the lower mold 102, and a connecting pipe 1041 is arranged in the cavity. The bottom of the connecting pipe 1041 is hermetically connected to an installation cylinder 104. The bottom of the installation cylinder 104 is hermetically connected to a water outlet pipe 1031. The other end of the water outlet pipe 1031 is connected to a water tank 103. The water tank 103 is arranged in the inner cavity of the workbench 1015. An inlet pipe 1032 is arranged on the water tank 103. The other end of the inlet pipe 1032 is connected to the cavity of the lower mold 102. A water pump 1033 is arranged on the inlet pipe 1032. A sliding door 1016 is arranged on the front side of the workbench 1015. Four notches are arranged on the side wall of the installation cylinder 104 in a circumferential distribution. A filter plate 106 is arranged on the inner wall of the connecting pipe 1041. The filter plate 106 is in an inner conical shape. A placement notch is arranged in the middle of the filter plate 106. The collection unit 300 includes four collection boxes 301. The four collection boxes 301 are respectively slidably and hermetically arranged in the inner cavity of the notches. The cooling unit 200 includes a driving component. The driving component is used to drive the four collection boxes 301 to move reciprocally. The driving unit can also be used to collect stains in the water. When the rotating part 2011 moves, it can also drive the moving rod 2014 to move vertically with the assistance of the positioning part 2016. When the moving rod 2014 moves vertically, it can drive the inclined block 2017 to move vertically. Therefore, the inclined block 2017 can open the placement notch arranged in the middle of the filter plate 106, so that the impurities accumulated on the inclined block 2017 can fall off. At this time, the fallen impurities will just enter the circular fixed cylinder 2023, so as to be collected. When the hydraulic cylinder 201 moves in the reverse direction, at this time, the above-mentioned circular fixed cylinder 2023 and the inclined block 2017 will both slowly reset. At this time, the semi-circular turning plate 203 arranged at the circular fixed cylinder 2023 can be turned under the torque force of the torsion spring 2033, so that the dust falling into the circular fixed cylinder 2023 can fall from the semi-circular notch 2024 into the collection box 301 after resetting below, so as to be collected.

[0042] As Figures 7 to 9As shown, in the specific implementation, the driving component includes a hydraulic cylinder 201. Above the hydraulic cylinder 201, a rotating member 2011 is fixedly installed. Four connecting rods 2012 arranged in a circumferential distribution are rotatably provided on the side wall of the rotating member 2011. A circular mounting ring 2013 is installed on the opposite side walls of the four connecting rods 2012. A telescopic protective cylinder 105 is sleeved on the outer side wall of the hydraulic cylinder 201, and the bottom of the telescopic protective cylinder 105 is installed on the mounting cylinder 104. In this setting, the installation position and components of the driving component are determined.

[0043] As Figures 4 to 9 shown, further, a moving rod 2014 is rotatably installed above the rotating member 2011. A positioning member 2016 is slidably provided on the moving rod 2014. Four positioning rods 2015 arranged in a circumferential distribution are fixedly installed on the side wall of the positioning member 2016. The opposite ends of the four positioning rods 2015 are respectively fixedly connected to the inner wall of the connecting pipe 1041. In this setting, the installation position of the moving rod 2014 is determined, ensuring that the moving rod 2014 can move vertically up and down.

[0044] As Figures 4 to 9 shown, further, four inclined blocks 2017 arranged in a circumferential distribution are fixedly installed on the upper side wall of the moving rod 2014. The four inclined blocks 2017 are hermetically arranged in the inner cavity of the placement notch. Guide blocks 2018 are provided on the opposite side walls of the four inclined blocks 2017 in pairs. The four guide blocks 2018 are arranged in a circumferential distribution, and the opposite ends of the four guide blocks 2018 are fixedly connected to the placement notch. In this setting, the installation position of the inclined blocks 2017 is determined, ensuring that the inclined blocks 2017 can move vertically with the moving rod 2014.

[0045] As Figures 4 to 9 shown, further, four arc-shaped chutes 202 arranged in a circumferential distribution are opened above the circular mounting ring 2013. Moving sliders 2021 are slidably installed in the inner cavities of the four arc-shaped chutes 202. The four moving sliders 2021 are arranged in a circumferential distribution. Circular fixing cylinders 2023 are fixedly installed above the four moving sliders 2021. Telescopic rods 2026 are fixedly installed on the side walls of the four circular fixing cylinders 2023. The four telescopic rods 2026 are symmetric with each other in pairs, and the other ends of the four telescopic rods 2026 are respectively fixedly connected to the inner wall of the mounting cylinder 104. In this setting, it is ensured that the circular fixing cylinder 2023 can move horizontally.

[0046] As Figures 4 to 9 shown, further, semi-circular notches 2024 are opened at the bottoms of the four circular fixing cylinders 2023. Semi-circular inclined plates 2025 are fixedly installed in the inner cavities of the four circular fixing cylinders 2023. A blanking sealing mechanism is arranged in the inner cavities of the four circular fixing cylinders 2023 and the semi-circular notches 2024. In this setting, the specific components of the circular fixing cylinder 2023 are determined.

[0047] As Figures 4 to 9 shown, further, the blanking sealing mechanism includes four semi-circular flipping plates 203. Rotating rods 2031 are fixedly installed at both ends of the four semi-circular flipping plates 203. Bearings 2032 are arranged at opposite ends of each pair of the rotating rods 2031. Each pair of the bearings 2032 is respectively arranged on the inner wall of the semi-circular notch 2024. Torsion springs 2033 are arranged on each of the rotating rods 2031. Both ends of each torsion spring 2033 are respectively arranged on the opposite side walls of the bearing 2032 and the semi-circular flipping plate 203. In this setting, it is ensured that the semi-circular flipping plates 203 can be flipped and reset.

[0048] Embodiment 2:

[0049] Different from the above embodiment and this embodiment: As Figures 6 to 9 shown, in a stainless steel impeller casting device for nuclear power, a guiding chute 204 is opened on the inner wall of the installation cylinder 104. A guiding slider 2041 is slidably installed in the inner cavity of the guiding chute 204. One end of the guiding slider 2041 away from the guiding chute 204 is fixedly connected to an adapter rod 2042. One end of the adapter rod 2042 away from the guiding slider 2041 is fixedly connected to the circular installation ring 2013. In this setting, it is ensured that the circular installation ring 2013 can still rotate when moving vertically.

[0050] As Figures 7 to 9 shown, in the specific implementation manner, four rectangular notches 1051 arranged in a circumferential distribution are opened on the side wall of the telescopic protection cylinder 105. Moving rods 3011 are arranged in the inner cavities of the four rectangular notches 1051. The four moving rods 3011 are symmetric with each other in pairs. One end of each of the four moving rods 3011 is movably connected to the hydraulic cylinder 201, and the other ends of the four moving rods 3011 are respectively movably connected to the collection box 301. In this setting, the installation positions of the moving rods 3011 are determined, and it is ensured that the collection box 301 can move.

[0051] Embodiment 3:

[0052] The present invention also discloses a stainless steel impeller casting process for nuclear power, and the steps are as follows:

[0053] Step 1: First, the staff injects casting liquid into the lower mold 102. When the placement is completed, the staff then controls the operation of the jack 1014 through the controller. Therefore, the jack 1014 can drive the upper mold 1021 to move, so that the upper mold 1021 and the lower mold 102 are hermetically sealed. At this time, the heating component and the like are controlled through the controller to heat it, so as to complete the forming of the stainless steel impeller;

[0054] Step 2: After the stainless - steel impeller is formed, at this time, the staff controls the operation of the water pump 1033 through the controller, so that the water pump 1033 can extract the coolant from the water tank 103. Therefore, the coolant can enter the cavity of the lower mold 102 through the water inlet pipe 1032, and then the formed stainless - steel impeller in the lower mold 102 can be cooled by the coolant. The coolant can be recycled through the connecting pipe 1041, the mounting cylinder 104, the water outlet pipe 1031 and the condenser, thus ensuring the cooling efficiency of the stainless - steel impeller cast in the lower mold 102. When the cooling is completed, stop the operation of the water pump 1033 at this time, so that the coolant can return to the water tank 103;

[0055] Step 3: At the same time, when the cooling is completed, the staff makes the cooling unit 200 operate through the controller, so that the impurities remaining at the filter plate 106 in the coolant can be cleaned, and the dust can fall into the collection unit 300. At the same time, when the cooling unit 200 operates to a certain extent and the collection box 301 is located on the outer wall of the mounting cylinder 104, the staff can process the dust stored in the collection box 301 last time by opening the sliding door 1016.

[0056] The implementation principle of a nuclear - power - used stainless - steel impeller casting device and its process in this embodiment is as follows:

[0057] First, the staff injects the casting liquid into the lower mold 102. When the placement is completed, the staff controls the operation of the jack 1014 through the controller. Therefore, the jack 1014 can drive the upper mold 1021 to move, so that the upper mold 1021 and the lower mold 102 are sealed with each other. After standing for a period of time, the stainless - steel impeller is formed;

[0058] After the stainless - steel impeller is formed, at this time, the staff controls the operation of the water pump 1033 through the controller, so that the water pump 1033 can extract the coolant from the water tank 103. Therefore, the coolant can enter the cavity of the lower mold 102 through the water inlet pipe 1032, and then the formed stainless - steel impeller in the lower mold 102 can be cooled by the coolant. The coolant can be recycled through the connecting pipe 1041, the mounting cylinder 104, the water outlet pipe 1031 and the condenser, thus ensuring the cooling efficiency of the stainless - steel impeller cast in the lower mold 102. When the cooling is completed, stop the operation of the water pump 1033 at this time, so that the coolant can return to the water tank 103;

[0059] When the cooling is completed, at this time, the staff controls the operation of the hydraulic cylinder 201 through the controller. When the hydraulic cylinder 201 operates, it can drive the rotating member 2011 to move. When the rotating member 2011 moves, it can drive the circular mounting ring 2013 to move through the connecting rod 2012. Since the circular mounting ring 2013 is connected to the guiding slider 2041 provided on the inner wall of the mounting cylinder 104 through the connecting rod 2042, and the guiding slider 2041 is slidably arranged on the guiding chute 204, the circular mounting ring 2013 can be driven to rotate;

[0060] When the circular mounting ring 2013 rotates, at this time, the circular fixing cylinder 2023 provided on the circular mounting ring 2013 can be limited by the telescopic rod 2026, so that the circular fixing cylinder 2023 can move horizontally with the assistance of the moving slider 2021 and the arc-shaped chute 202 provided on the circular mounting ring 2013. When the circular fixing cylinder 2023 moves horizontally, it can drive the semi-circular turning plate 203 to move. Therefore, the semi-circular turning plate 203 can contact the outer wall of the circular mounting ring 2013, so that the semi-circular turning plate 203 can slowly close with the assistance of the rotating rod 2031 and the bearing 2032. Therefore, the semi-circular notch 2024 opened at the circular fixing cylinder 2023 can be blocked;

[0061] At the same time, when the rotating member 2011 moves, it can also drive the moving rod 2014 to move vertically with the assistance of the positioning member 2016. When the moving rod 2014 moves vertically, it can drive the inclined block 2017 to move vertically. Therefore, the inclined block 2017 can open the placement notch opened in the middle of the filter plate 106, so that the impurities accumulated on the inclined block 2017 can fall off. At this time, the fallen impurities will just enter the circular fixing cylinder 2023, so as to be collected;

[0062] At the same time, when the hydraulic cylinder 201 moves, it can also drive the movable rod 3011 to move. Therefore, the collection box 301 can be driven to move horizontally back and forth through the movable rod 3011. When the collection box 301 is located on the outer side wall of the mounting cylinder 104, at this time, the staff can handle the dust in the collection box 301 by opening the sliding door 1016 provided on the workbench 1015;

[0063] When the hydraulic cylinder 201 moves in the reverse direction, at this time, the above-mentioned circular fixing cylinder 2023 and the inclined block 2017 will both slowly reset. At this time, the semi-circular turning plate 203 provided at the circular fixing cylinder 2023 can be flipped under the torque force of the torsion spring 2033, so that the dust falling into the circular fixing cylinder 2023 can fall from the semi-circular notch 2024 into the collection box 301 after resetting below, so as to be collected.

Claims

1. A stainless steel impeller casting device for nuclear power, comprising a casting unit (100), a cooling unit (200) and a collection unit (300), characterized in that: The casting unit (100) includes a mounting base (101). Support legs (1011) are fixedly installed around the bottom of the mounting base (101). Four support rods (1012) are fixedly installed above the mounting base (101). The four support rods (1012) are symmetric with each other in pairs. A top plate (1013) is installed above the four support rods (1012). A jack (1014) is arranged in the middle of the bottom of the top plate (1013). An upper mold (1021) is arranged at the bottom of the jack (1014). A workbench (1015) is also fixedly installed above the mounting base (101). A lower mold (102) is arranged above the workbench (1015). A cavity is arranged inside the lower mold (102), and a connecting pipe (1041) is arranged in the cavity. The bottom of the connecting pipe (1041) is hermetically connected to an installation cylinder (104). The bottom of the installation cylinder (104) is hermetically connected to a water outlet pipe (1031). The other end of the water outlet pipe (1031) is connected to a water tank (from 103). The water tank (103) is arranged inside the workbench (1015). An inlet pipe (1032) is arranged on the water tank (103). The other end of the inlet pipe (1032) is connected to the cavity inside the lower mold (102). A water pump (1033) is arranged on the inlet pipe (1032). A sliding door (1016) is arranged on the front side of the workbench (1015). Four notches arranged in a circumferential distribution are formed on the side wall of the installation cylinder (104). A filter plate (106) is arranged on the inner wall of the connecting pipe (1041). The filter plate (106) is in an inner conical shape, and a placement notch is formed in the middle of the filter plate (106); The collection unit (300) includes four collection boxes (301), and the four collection boxes (301) are respectively slidably and hermetically arranged in the inner cavities of the notches; The cooling unit (200) includes a driving assembly, the driving assembly is used to drive the four collection boxes (301) to move reciprocally, and the driving assembly is also used to collect stains in water; The driving assembly includes a hydraulic cylinder (201). A rotating part (2011) is fixedly installed above the hydraulic cylinder (201). Four connecting rods (2012) arranged in a circumferential distribution are rotatably arranged on the side wall of the rotating part (2011). Circular mounting rings (2013) are installed on the opposite side walls of the four connecting rods (2012). A telescopic protective cylinder (105) is sleeved on the outer side wall of the hydraulic cylinder (201). The bottom of the telescopic protective cylinder (105) is installed on the installation cylinder (104); Above the circular mounting ring (2013), there are four arc-shaped sliding grooves (202) arranged in a circumferential distribution. A moving slider (2021) is slidably installed in the inner cavity of each of the four arc-shaped sliding grooves (202). The four moving sliders (2021) are arranged in a circumferential distribution. A circular fixing cylinder (2023) is fixedly installed above each of the four moving sliders (2021). A telescopic rod (2026) is fixedly installed on the side wall of each of the four circular fixing cylinders (2023). The four telescopic rods (2026) are symmetric with each other in pairs. The other ends of the four telescopic rods (2026) are respectively fixedly connected to the inner wall of the mounting cylinder (104). A semi-circular notch (2024) is opened at the bottom of each of the four circular fixing cylinders (2023). A semi-circular inclined plate (2025) is fixedly installed in the inner cavity of each of the four circular fixing cylinders (2023). A blanking sealing mechanism is arranged in the inner cavities of the four circular fixing cylinders (2023) and the semi-circular notch (2024). The blanking sealing mechanism includes four semi-circular turning plates (203). A rotating rod (2031) is fixedly installed at each of the two ends of the four semi-circular turning plates (203). A bearing (2032) is arranged at each of the two opposite ends of each rotating rod (2031). Each of the bearings (2032) is respectively arranged on the inner wall of the semi-circular notch (2024) between two of them. A torsion spring (2033) is arranged on each rotating rod (2031). The two ends of each torsion spring (2033) are respectively arranged on the opposite side walls of the bearing (2032) and the semi-circular turning plate (203).

2. The stainless steel impeller casting device for nuclear power according to claim 1, wherein, A moving rod (2014) is rotatably installed above the rotating part (2011). A positioning part (2016) is slidably arranged on the moving rod (2014). Four positioning rods (2015) arranged in a circumferential distribution are fixedly installed on the side wall of the positioning part (2016). The two opposite ends of each of the four positioning rods (2015) are respectively fixedly connected to the inner wall of the connecting pipe (1041).

3. The stainless steel impeller casting device for nuclear power according to claim 2, characterized in that, Four inclined blocks (2017) arranged in a circumferential distribution are fixedly installed on the upper side wall of the moving rod (2014). The four inclined blocks (2017) are hermetically arranged in the inner cavity of the placing notch. Guide blocks (2018) are arranged on the two opposite side walls of each of the four inclined blocks (2017). The four guide blocks (2018) are arranged in a circumferential distribution. The two opposite ends of each of the four guide blocks (2018) are fixedly connected to the placing notch.

4. A stainless steel impeller casting device for nuclear power according to claim 1, characterized in that, A guide sliding groove (204) is opened on the inner wall of the mounting cylinder (104). A guide slider (2041) is slidably installed in the inner cavity of the guide sliding groove (204). One end of the guide slider (2041) away from the guide sliding groove (204) is fixedly connected to a connecting rod (2042). One end of the connecting rod (2042) away from the guide slider (2041) is fixedly connected to the circular mounting ring (2013).

5. A stainless steel impeller casting device for nuclear power according to claim 1, characterized in that, Four rectangular notches (1051) are circumferentially distributed on the side wall of the telescopic protective cylinder (105). A movable rod (3011) is arranged in the inner cavity of each of the four rectangular notches (1051). The four movable rods (3011) are symmetric with each other in pairs. One end of each of the four movable rods (3011) is movably connected to the hydraulic cylinder (201), and the other ends of the four movable rods (3011) are respectively movably connected to the collection box (301).

6. A casting process for a stainless steel impeller used in nuclear power, characterized in that, Applied to a stainless steel impeller casting device for nuclear power as described in any one of claims 1 to 5, the stainless steel impeller casting process for nuclear power is as follows: Step 1: First, the staff injects casting liquid into the lower mold (102). When the placement is completed, the staff controls the operation of the jack (1014) through the controller. Therefore, the jack (1014) can drive the upper mold (1021) to move, so that the upper mold (1021) and the lower mold (102) are sealed with each other. At this time, the heating component and the like are controlled by the controller to heat it, so as to complete the forming of the stainless steel impeller; Step 2: When the stainless steel impeller is formed, at this time, the staff controls the operation of the water pump (1033) through the controller, so that the water pump (1033) can extract the coolant from the water tank (103). Therefore, the coolant can enter the cavity of the lower mold (102) through the water inlet pipe (1032), so as to cool the formed stainless steel impeller in the lower mold (102) with the coolant. The coolant can be recycled through the connecting pipe (1041), the installation cylinder (104), the water outlet pipe (1031) and the condenser, so as to ensure the cooling efficiency of the formed stainless steel impeller in the lower mold (102). When the cooling is completed, the operation of the water pump (1033) is stopped at this time, so that the coolant can return to the water tank (103); Step 3: At the same time, when the cooling is completed, at this time, the staff makes the cooling unit (200) operate through the controller, so that the impurities remaining at the filter plate (106) in the coolant can be cleaned, so that the dust can fall into the collection unit (300). At the same time, when the cooling unit (200) operates to a certain extent and the collection box (301) is located on the outer side wall of the installation cylinder (104), at this time, the staff can process the dust stored in the collection box (301) last time by opening the sliding door (1016).

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