Special forging forming equipment and processing technology for integrated forged valve body of power station stop valve

Abstract

The application discloses a special forging forming equipment for an integrated forged valve body of a power station stop valve and a machining process thereof, which comprises a forging table, a first driving seat and a second driving seat, the top of the forging table is provided with an L-shaped fixing seat through bolts, the top of the L-shaped fixing seat is provided with the first driving seat and the second driving seat through the pedestals at both ends, respectively, one side of the first driving seat and the second driving seat is respectively provided with a first servo motor and a second servo motor through mounting seats, and the output shafts of the first servo motor and the second servo motor are connected with lead screws through couplings. In the process of forging, the valve body is cooled down quickly, the burner is used for combustion to have a heat preservation effect on the valve body, the cooling is slowed down, the valve body can be continuously forged, the forged valve body is prevented from being returned to the furnace again, the production process is prevented from being complicated, the forging openings at the two sides of the forging die are used for guiding, and the strength of the two sides of the forging die is improved.

Description

Technical Field

[0001] This invention belongs to the field of forging technology, specifically relating to a special forging forming equipment and processing technology for an integrated forged valve body of a power station shut-off valve. Background Technology

[0002] Forging is a processing method that uses forging machinery to apply pressure to metal billets, causing them to undergo plastic deformation to obtain forgings with certain mechanical properties, shapes, and dimensions. It is one of the two major components of forging and pressing (forging and stamping). Forging can eliminate defects such as casting porosity generated during the smelting process, optimize the microstructure, and, because it preserves the complete metal flow lines, the mechanical properties of forgings are generally superior to those of castings made of the same material. Important parts in related machinery that are subject to high loads and harsh working conditions are mostly forged, except for simpler shapes that can be made from rolled plates, profiles, or welded parts. Power station gate valves need to be forged using forging equipment during the production process to facilitate rapid forming. After that, they are sprayed with anti-corrosion paint and enter the next process. However, the existing forging equipment and processing technology for valve bodies cannot keep the valve body warm and slow down the cooling process, allowing for continuous forging. It cannot avoid the need to remelt the unformed valve body, making the production process cumbersome. Summary of the Invention

[0003] The purpose of this invention is to provide a dedicated forging equipment and processing technology for an integrated forged valve body of a power station shut-off valve, in order to solve the problems mentioned in the background art, such as the inability of existing dedicated forging equipment and processing technology for forged valve bodies to achieve the effect of heat preservation and slow down the cooling so that continuous forging can be carried out, and the inability to avoid remelting the unformed valve body, which causes cumbersome production process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a special forging forming equipment for an integrated forged valve body of a power station gate valve, comprising a forging table, a first drive seat, and a second drive seat. An L-shaped fixing seat is bolted to the top of the forging table. The top two ends of the L-shaped fixing seat are respectively provided with a first drive seat and a second drive seat via a platform. A first servo motor and a second servo motor are respectively mounted on one side of each of the first and second drive seats via mounting bases. The output shafts of both the first and second servo motors are connected to lead screws via couplings, and each lead screw is fitted with a... There are two wire blocks, No. 1 and No. 2. The tops of both wire blocks are respectively bolted to a first hydraulic cylinder and a second hydraulic cylinder. A support column B is welded to the top of the L-shaped fixed seat and located between the first and second drive seats. A forging die is bolted to the top of the support column B. A burner is mounted on one side of the forging die through a mounting hole. A support column A is welded to one side of the top of the forging table. A fuel tank is bolted to the top of the support column A. The output port of the fuel tank is connected to the input port of the control valve, and the output port of the control valve is connected to the gas collection chamber.

[0005] Furthermore, a sealing cover is bolted to the top of the forging die, and forging ports are welded to both sides of the forging die. The output shafts of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the first forging rod and the second forging rod. The forging heads of the first forging rod and the second forging rod both pass through the forging ports and are located inside the forging die.

[0006] Furthermore, guide rods are installed on both sides of the lead screw through mounting holes, and reserved holes are opened on both sides of the first and second lead blocks, with the guide rods passing through the reserved holes.

[0007] Furthermore, the output port of the gas collection chamber is connected to the burner via a bent connecting pipe, and X-shaped support frames are welded at equal intervals to the bottom of the forging table.

[0008] The specific forging process steps for the one-piece forged valve body of the power station shut-off valve are as follows:

[0009] Step 1: Put the valve body material into the ultrasonic cleaner, add water and sodium carbonate solution for ultrasonic cleaning, and after cleaning, quickly dry it in warm air to remove dirt and impurities from the material surface.

[0010] Step 2: Place the cleaned valve body material into the furnace chamber of the medium frequency furnace and heat it to 900-1000 degrees Celsius;

[0011] Step 3: Use a clamp to place the heated forging material into the forging mold and lock the sealing cover. Use servo motors 1 and 2 to drive the lead screw to rotate, so that lead screw 1 and lead screw 2 slide towards each other.

[0012] Step 4: Connect the power supply to the first hydraulic cylinder to drive the forging head of the first forging rod to forge the valve body material. After one side of the valve body is formed, open the control valve to allow the fuel in the fuel tank to enter the burner, which will facilitate combustion and continue to heat up the valve body.

[0013] Step 5: Connect the power supply to the second hydraulic cylinder to drive the forging head of the second forging rod to forge the other side of the valve body. Heat while forging, and each forging time shall not exceed 10 minutes to achieve one-piece forging.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Using a clamp, the heated forging material is placed into the forging mold and the sealing cap is engaged. Servo motors one and two drive the lead screw to rotate, causing lead blocks one and two to slide towards each other. The power to the first hydraulic cylinder is switched on, driving the forging head of the first forging rod to forge the valve body material. Once one side of the valve body is formed, the control valve is opened to allow fuel from the fuel tank to enter the burner, facilitating combustion and further heating of the valve body. The power to the second hydraulic cylinder is switched on, driving the forging head of the second forging rod to forge the other side of the valve body. Forging and heating occur simultaneously, with each forging session lasting no more than 10 minutes. This achieves integrated forging, high forging efficiency, strong practicality, saving manpower and resources, and is highly automated, safe, and reliable.

[0016] 2. During the forging process, the valve body cools down rapidly. The burner is used to keep the valve body warm, slowing down the cooling process and allowing for continuous forging. This avoids remelting unfinished valve bodies, which would complicate the production process. The forging openings on both sides of the forging die act as guides and increase the strength of both sides of the forging die, preventing cracking during forging and affecting service life. The X-shaped support frame welded at equal intervals at the bottom of the forging table improves the overall strength, rigidity, and stability of the forging table, preventing shaking during forging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the special forging equipment and processing technology for the integrated forged valve body of the power station shut-off valve of the present invention.

[0018] Figure 2 This is a schematic diagram of the X-shaped support frame structure of the special forging equipment and processing technology for the integrated forged valve body of the power station shut-off valve of the present invention.

[0019] Figure 3 This is a schematic diagram of the control valve structure of the integrated forged valve body for the power plant shut-off valve of the present invention, including a special forging forming equipment and its processing technology.

[0020] Figure 4This is a detailed structural diagram of section A of the special forging equipment and processing technology for the integrated forged valve body of the power station shut-off valve of the present invention.

[0021] In the diagram: 1. Servo motor No. 1; 2. Drive base No. 1; 3. Lead screw; 4. Lead block No. 1; 5. First hydraulic cylinder; 6. Forging port; 7. Forging die; 8. Sealing cap; 9. Gas collection chamber; 10. Fuel tank; 11. First forging rod; 12. Drive base No. 2; 13. Servo motor No. 2; 14. Second forging rod; 15. Guide rod; 16. Lead block No. 2; 17. Support column A; 18. L-shaped fixed seat; 19. Forging table; 20. Support column B; 21. X-shaped support frame; 22. Bend connecting pipe; 23. Burner; 24. Control valve; 25. Second hydraulic cylinder. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1-4 As shown, the forging equipment for the integrated forged valve body of the power station gate valve includes a forging table 19, a first drive seat 2, and a second drive seat 12. An L-shaped fixing seat 18 is bolted to the top of the forging table 19. The first drive seat 2 and the second drive seat 12 are respectively mounted on the top ends of the L-shaped fixing seat 18 via a platform. A first servo motor 1 and a second servo motor 13 are respectively mounted on one side of each of the first and second drive seats 12 via mounting bases. The output shafts of both the first and second servo motors 1 and 13 are connected to lead screws 3 via couplings. First lead screw blocks 4 and second lead screw blocks 16 are respectively fitted onto the lead screws 3. The tops of the first wire block 4 and the second wire block 16 are respectively bolted with a first hydraulic cylinder 5 and a second hydraulic cylinder 25. A support column B20 is welded to the top of the L-shaped fixed seat 18 and located between the first drive seat 2 and the second drive seat 12. A forging die 7 is bolted to the top of the support column B20. A burner 23 is installed on one side of the forging die 7 through a mounting hole. A support column A17 is welded to one side of the top of the forging table 19. A fuel tank 10 is bolted to the top of the support column A17. The output port of the fuel tank 10 is connected to the input port of the control valve 24, and the output port of the control valve 24 is connected to the gas collection chamber 9.

[0024] The forging mold 7 has a sealing cover 8 bolted to its top. Forging ports 6 are welded to both sides of the forging mold 7. The output shafts of the first hydraulic cylinder 5 and the second hydraulic cylinder 25 are respectively connected to the first forging rod 11 and the second forging rod 14. The forging heads of the first forging rod 11 and the second forging rod 14 pass through the forging ports 6 and are located inside the forging mold 7. When the power supply to the first hydraulic cylinder 5 is turned on, the forging head of the first forging rod 11 is driven to forge the valve body material. When the power supply to the second hydraulic cylinder 25 is turned on, the forging head of the second forging rod 14 is driven to forge the other side of the valve body. The forging is carried out while heating is being carried out. Each forging time does not exceed 10 minutes, achieving one-piece forging and forming with high forging efficiency and strong practicality.

[0025] Among them, guide rods 15 are installed on both sides of the lead screw 3 through mounting holes, and reserved holes are opened on both sides of the first lead block 4 and the second lead block 16, and the guide rods 15 pass through the reserved holes.

[0026] The gas collection chamber 9 is connected to the burner 23 via a bent connecting pipe 22. X-shaped support frames 21 are welded at equal intervals to the bottom of the forging table 19. The X-shaped support frames 21 welded at equal intervals to the bottom of the forging table 19 improve the overall strength, rigidity and stability of the forging table 19 and prevent shaking during the forging process.

[0027] The specific forging process steps for the one-piece forged valve body of the power station shut-off valve are as follows:

[0028] Step 1: Put the valve body material into the ultrasonic cleaner, add water and sodium carbonate solution for ultrasonic cleaning, and after cleaning, quickly dry it in warm air to remove dirt and impurities from the material surface.

[0029] Step 2: Place the cleaned valve body material into the furnace chamber of the medium frequency furnace and heat it to 900-1000 degrees Celsius;

[0030] Step 3: Use a clamp to place the heated forging material into the forging mold 7 and lock the sealing cover 8. Use servo motor 1 and servo motor 13 to drive the lead screw 3 to rotate, so that lead block 4 and lead block 16 slide towards each other.

[0031] Step 4: Connect the power supply to the first hydraulic cylinder 5 to drive the forging head of the first forging rod 11 to forge the valve body material. After one side of the valve body is formed, open the control valve 24 to allow the fuel in the fuel tank 10 to enter the burner 23, so as to facilitate combustion and continue to heat up the valve body.

[0032] Step 5: Connect the power supply to the second hydraulic cylinder 25 to drive the forging head of the second forging rod 14 to forge the other side of the valve body. Heat while forging, and each forging time shall not exceed 10 minutes to achieve one-piece forging.

[0033] In operation, the heated forging material is placed into the forging mold 7 using a clamp and the sealing cover 8 is engaged. Servo motors 1 and 13 drive the lead screw 3 to rotate, causing lead screw blocks 4 and 16 to slide towards each other. The power to the first hydraulic cylinder 5 is switched on, driving the forging head of the first forging rod 11 to forge the valve body material. Once one side of the valve body is formed, the control valve 24 is opened, allowing fuel from the fuel tank 10 to enter the burner 23 for combustion, further heating the valve body. The power to the second hydraulic cylinder 25 is switched on, driving the forging head of the second forging rod 14 to forge the other side of the valve body. Forging and heating occur simultaneously, with each forging session lasting no more than 10 minutes. This achieves integrated forging, high forging efficiency, strong practicality, saves manpower and resources, and is highly automated, safe, and reliable. During the forging process, the valve body cools down rapidly. The burner 23 is used to keep the valve body warm and slow down the cooling process, allowing for continuous forging. This avoids having to remelt the unfinished valve body, which would complicate the production process. The forging ports 6 on both sides of the forging die 7 serve as guides and increase the strength of both sides of the forging die 7, preventing cracking during forging and affecting service life. The X-shaped support frames 21 welded at equal intervals at the bottom of the forging table 19 improve the overall strength, rigidity, and stability of the forging table 19, preventing it from shaking during forging.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special forging forming equipment for integrated forging valve body of power station stop valve, comprising a forging table (19), a first driving seat (2) and a second driving seat (12), characterized in that, The top of the forging table (19) is provided with an L-shaped fixing seat (18) through bolt mounting, both ends of the top of the L-shaped fixing seat (18) are respectively provided with a first driving seat (2) and a second driving seat (12) through pedestals, one side of the first driving seat (2) and the second driving seat (12) is respectively provided with a first servo motor (1) and a second servo motor (13) through mounting seats, the output shafts of the first servo motor (1) and the second servo motor (13) are connected with lead screws (3) through couplings, the lead screws (3) are respectively sleeved with first lead screws (4) and second lead screws (16), the top of the first lead screws (4) and the second lead screws (16) is respectively provided with first hydraulic oil cylinders (5) and second hydraulic oil cylinders (25) through bolt mounting, the top of the L-shaped fixing seat (18) and between the first driving seat (2) and the second driving seat (12) is welded with a support column B (20), the top of the support column B (20) is provided with a forging die (7) through bolt mounting, one side of the forging die (7) is provided with a burner (23) through a mounting hole, the top end of the forging table (19) is welded with a support column A (17), the top of the support column A (17) is provided with a fuel tank (10) through bolt mounting, the output port of the fuel tank (10) is connected with the input port of a control valve (24) and the output port of the control valve (24) is connected with a gas collection bin (9); The top of the forging die (7) is provided with a sealing cover (8) through bolt mounting, both sides of the forging die (7) are welded with forging openings (6), the output shafts of the first hydraulic oil cylinders (5) and the second hydraulic oil cylinders (25) are respectively connected with first forging rods (11) and second forging rods (14), the forging heads of the first forging rods (11) and the second forging rods (14) penetrate the forging openings (6) and are located in the forging die (7).

2. The special forging machine for integrally forging the valve body of the power station stop valve according to claim 1, characterized in that: Both sides of the lead screw (3) are provided with guide rods (15) through mounting holes, both sides of the first lead screw (4) and the second lead screw (16) are respectively provided with reserved holes and the guide rods (15) penetrate the reserved holes.

3. The special forging equipment for integrally forging the valve body of the power station stop valve according to claim 1, characterized in that: The output port of the gas collection bin (9) is connected with the burner (23) through a bend connecting pipe (22), the bottom of the forging table (19) is welded with X-shaped support frames (21) at equal distances.

4. The special forging machine for integrally forging the valve body of the power plant stop valve according to any one of claims 1 to 3, characterized in that, The specific processing steps are as follows: Step one: the valve body raw material is put into the ultrasonic cleaner, and the ultrasonic cleaning is carried out by adding clean water and sodium carbonate solution, and after cleaning, the material surface is quickly dried in warm air to remove dirt and impurities; Step two: the cleaned valve body raw material is placed in the furnace cavity of the intermediate frequency furnace for heating to 900-1000 degrees Celsius; Step three: the heated forging raw material is placed in the forging die (7) by using the clamp and the sealing cover (8) is clamped, the lead screw (3) is driven to rotate by the first servo motor (1) and the second servo motor (13), so that the first lead screw (4) and the second lead screw (16) slide towards each other; Step four: turn on the power of the first hydraulic cylinder (5), drive the forging head of the first forging rod (11) to forge the valve body raw material, when one side of the valve body is formed, open the control valve (24) to make the fuel in the fuel tank (10) enter the burner (23), which is convenient for burning to continue heating the valve body; Step five: turn on the power of the second hydraulic cylinder (25), drive the forging head of the second forging rod (14) to forge the other side of the valve body, heat while forging, the time of each forging does not exceed 10 minutes, realize integrated forging forming.

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