Manufacturing method of high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment

Abstract

The present invention discloses a method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment, belonging to the technical field of underwater connector production. The method comprises the following steps: placing a steel billet raw material into a forging furnace for heating, and forging after heating and heat preservation to obtain an underwater connector forging; passing the forged underwater connector forging through a high-pressure water pretreatment device for pretreatment to remove the oxidized surface of the forging during forging; passing the underwater connector forging after the high-pressure water pretreatment through a pickling device for post-treatment to subsequently treat the oxidized surface of the forging; the present invention pre-treats the oxidized surface of the underwater connector forging by high-pressure water, and the treatment time is short, thereby reducing the subsequent pickling time of the underwater connector forging and improving the batch production efficiency of the underwater connector.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater connector production, and in particular to a method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment. Background Art

[0002] In order to reduce mining costs and obtain high-yield oil and gas resources in the deep sea, its mining equipment needs to have higher comprehensive characteristics. Underwater connectors are used in deep-sea oil and gas equipment. Underwater connectors are a device used to connect cables or cable assemblies in an underwater environment. They are used in deep-sea oil and gas equipment to achieve underwater connections between cables and cable assemblies.

[0003] In the manufacturing process of underwater connectors, it is necessary to forge the metal raw materials for underwater connector production. During the forging process, the metal is heated to a high temperature, and oxygen reacts with the metal, resulting in the formation of oxide scale. At the same time, high temperature accelerates the reaction rate of metal and oxygen, and mechanical force causes the oxide to leave the metal surface to form oxide scale. The oxide scale makes the surface of the forging rough. If the oxide scale is not removed in time during forging, it is easy to increase the deformation of the forging and the energy consumption. The oxide scale is forged and pressed into the forging, and in severe cases it will become scrap. At the same time, removing the oxide scale from the forging after cooling requires additional processes, equipment, and labor. Traditionally, the oxide scale is removed by mechanical processing, and mechanical tools are used to scrape the surface of the forging after forming, and grinding wheels are used for dressing. The surface treatment time of the forging is long, which affects the batch production efficiency of the underwater connector. Therefore, it is very necessary to design a manufacturing method for high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connectors for deep-sea oil and gas equipment. Summary of the Invention

[0004] The object of the present invention is to provide a method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment, comprising the following steps:

[0006] S1: taking a steel billet having the following weight components: C: 0.03-0.15%, Si: 0.25-0.5%, Mn: 0.5-0.8%, P: 0.005-0.010%, S: 0.003-0.012%, Cr: 0.10-0.50%, Mo: 0.5-1.2%, Cu: 0.005-0.40%, Ti: 0.005-0.04%, Al: 0.03-0.07%, Nb: 0.05-0.1%, V: 0.01-0.05%, Ni: 6-10%, and the rest being Fe as a raw material, putting the steel billet into a forging furnace for heating, heating and heat preservation, and then forging to obtain an underwater connector forging;

[0007] S2: The underwater connector forgings are pre-treated by a high-pressure water pre-treatment device to remove the oxidized surface of the forgings;

[0008] The high-pressure water pretreatment device includes a front feed guide roller platform, a treatment box, a high-pressure water delivery pipe and a rear feed guide roller platform. The treatment box is located between the discharge end of the front feed guide roller platform and the feed end of the rear feed guide roller platform. The high-pressure water delivery pipe is connected to the treatment box. The front feed guide roller platform and the rear feed guide roller platform are used to transport the underwater connector forgings. A high-pressure water treatment channel for the underwater connector forgings to pass through is opened in the middle of the treatment box. A plurality of adjustable nozzles are provided inside the high-pressure water treatment channel for spraying high-pressure water towards the underwater connector forgings.

[0009] S3: The underwater connector forgings that have been pre-treated with high-pressure water are post-treated by a pickling device to subsequently treat the oxidized surface of the forgings;

[0010] The pickling device includes a material guiding table, a material unloading table, a pickling tank and a clamping mechanism, the material guiding table is connected to the material discharging end of the rear feeding guide roller table, the material unloading table is connected to the material guiding table, the pickling tank is arranged on one side of the material unloading table and is arranged parallel to the material unloading table, the bottom of the pickling tank is provided with a conveying guide roller in an inclined state, the conveying guide roller entrance and the material unloading table are connected by an inclined slide, the material unloading table is provided with a pushing cylinder for pushing the underwater connector forging coming out of the material guiding table discharge port into the conveying guide roller entrance along the slide, the conveying guide roller entrance is higher than the exit, and the clamping mechanism is located above the conveying guide roller exit and is used to move the underwater connector forging conveyed to the conveying guide roller exit out of the pickling tank;

[0011] S4: heat treating the underwater connector forging after pickling treatment, first normalizing the underwater connector forging, austenitizing and deep cold quenching after normalizing, and then high temperature tempering;

[0012] S5: Performing nondestructive testing and machining on the heat-treated underwater connector forging to obtain a finished underwater connector.

[0013] In a further embodiment, adjustable baffles are provided on both sides of the slideway, and adjusting cylinders are provided on both sides of the slideway, and output ends of the adjusting cylinders are connected to adjacent adjustable baffles.

[0014] In a further embodiment, the treatment box is provided with a nozzle adjustment mechanism for adjusting the position of the adjustable nozzle, the nozzle adjustment mechanism includes a positioning ring arranged in the treatment box and located outside the high-pressure water treatment channel, the positioning ring is provided with a plurality of transmission screws corresponding one-to-one with the adjustable nozzle, the transmission screw is threaded with a slider, the slider is provided with a push rod, one end of the push rod is connected to the mounting seat, the mounting seat is provided with a water guide seat connected to the adjustable nozzle, the outside of the positioning ring is provided with a water storage ring pipe connected to the high-pressure water delivery pipe, the water storage ring pipe is provided with a plurality of connecting pipes, the connecting pipe is provided with a water guide hose connected to the water guide seat, and the treatment box is provided with a driving mechanism for driving the transmission screw to rotate.

[0015] In a further embodiment, the driving mechanism includes a driving ring arranged on the outside of the water storage ring tube, the outer surface of the driving ring is circumferentially provided with external transmission teeth, the inner surface of the driving ring is circumferentially provided with internal transmission teeth, a driving motor is provided in the processing box, the output end of the driving motor is connected to the driving wheel, the driving wheel and the external transmission teeth are engaged with each other, and a transmission shaft is installed on one side of several transmission screws in the processing box through a transmission seat, a transmission wheel is fixedly sleeved on the transmission shaft, the transmission wheel and the internal transmission teeth are engaged with each other, a first bevel gear is also fixedly sleeved on the transmission shaft, and a second bevel gear is fixedly sleeved on the transmission screw and is engaged with the first bevel gear.

[0016] In a further embodiment, the clamping mechanism includes a mounting frame arranged above the outlet of the conveying guide roller, and a slide cylinder is symmetrically provided on the mounting frame, the output end of the slide cylinder is connected to the adjustment plate, a Y-axis moving module is provided at the bottom of the adjustment plate, an X-axis adjustment module is provided at the bottom of the Y-axis moving module, two Y-axis adjustment modules are symmetrically provided at the bottom of the X-axis adjustment module, and two clamping seats are symmetrically provided at the bottom of the Y-axis adjustment module, the Y-axis moving module is used to adjust the position of the X-axis adjustment module in the Y-axis direction, the X-axis adjustment module is used to adjust the distance between the two Y-axis adjustment modules, and the Y-axis adjustment module is used to adjust the distance between the two clamping seats.

[0017] In a further embodiment, the Y-axis moving module includes a Y-axis moving frame, a Y-axis moving motor is provided on the Y-axis moving frame, and the output end of the Y-axis moving motor is connected to the Y-axis moving screw. The X-axis adjustment module includes an X-axis adjustment frame, the X-axis adjustment frame is threadedly connected to the Y-axis moving screw, the X-axis adjustment frame is provided with an X-axis adjustment motor, and the output end of the X-axis adjustment motor is connected to the X-axis bidirectional screw. The Y-axis adjustment module includes a Y-axis adjustment frame, and the two Y-axis adjustment frames are respectively threadedly connected to the threaded segments of the X-axis bidirectional screw with opposite rotation directions. The Y-axis adjustment frame is provided with a Y-axis adjustment motor, and the output end of the Y-axis adjustment motor is connected to the Y-axis bidirectional screw, and the two clamps are respectively threadedly connected to the threaded segments of the Y-axis bidirectional screw with opposite rotation directions.

[0018] In a further embodiment, a base is provided at the bottom of the pickling tank, a clean water tank is provided on the top of the base located on one side of the pickling tank, a rotating motor is provided on the top of the base located between the pickling tank and the clean water tank, the output end of the rotating motor is connected to the rotating seat, a vertical frame is fixed on the top of the rotating seat, and the mounting frame is fixed on the vertical frame.

[0019] In a further embodiment, the conveying guide roller is tilted downward at an angle of 5-10°, and the slide is tilted downward at an angle of 50-70°.

[0020] In a further embodiment, a rotation groove cooperating with the driving ring is provided in the processing box.

[0021] In a further embodiment, an adjusting motor is provided in the mounting seat, and an output end of the adjusting motor is connected to the water guide seat.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. After forging, the underwater connector forgings are transported to the high-pressure water treatment channel of the processing box through the front feeding guide roller table in turn. The external high-pressure water is transported to the adjustable nozzle through the high-pressure water delivery pipe and sprayed out, and the surface of the underwater connector forging passing through the high-pressure water treatment channel is washed with high-pressure water. The high-pressure water forms a fan-shaped water jet with high impact through the adjustable nozzle and hits the surface of the underwater connector forging. The oxidized surface of the underwater connector forging is cut, rapidly cooled and shrunk under the action of the fan-shaped water jet, and is peeled off from the base material of the underwater connector forging. At the same time, the fan-shaped water jet washes away the loosened oxidized surface, shortening the treatment time of the oxidized surface of the forging, improving production efficiency and reducing the subsequent pickling time. The underwater connector forgings after high-pressure water washing are passed through the processing box in turn. Afterwards, the feeding guide roller table continues to convey, and the underwater connector forgings are conveyed to the discharge table through the guide table. The underwater connector forgings coming out of the guide table outlet are pushed into the conveying guide roller entrance through the slide by the pushing cylinder. The underwater connector forgings fall on the conveying guide roller in turn, and the underwater connector forgings produced in batches are conveyed by the conveying guide roller. When the underwater connector forgings are conveyed to the conveying guide roller outlet, the underwater connector forgings conveyed to the conveying guide roller outlet are removed by the clamping mechanism, realizing the batch pickling operation of the underwater connector forgings, improving the efficiency of removing the oxidized surface of the underwater connector forgings, and at the same time facilitating the cleaning of the oxidized surface of the deep holes, grooves and other parts on the surface of the underwater connector forgings, ensuring that the oxidized surface of the underwater connector forgings is fully cleaned;

[0024] 2. The position of the adjustable nozzle is adjusted through the nozzle adjustment mechanism. Before the high-pressure water is used to remove the oxidized surface of the forging, the adjustable nozzle is pre-adjusted according to the size of the underwater connector forging to facilitate the subsequent pretreatment of the oxidized surface of the forging;

[0025] 3. After the pickling of the underwater connector forgings in the pickling tank is completed, the underwater connector forgings are clamped out by the clamping mechanism, the rotating seat is driven to rotate by the rotary motor, and then the mounting frame is driven to rotate by the vertical frame, and the mounting frame is rotated to the top of the clean water tank, and then the underwater connector forgings are placed in the clean water tank for clean water cleaning through the clamping mechanism, which is convenient for subsequent processing of the underwater connector forgings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of the method of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the high-pressure water pretreatment device and the pickling device of the present invention;

[0028] Figure 3 is a side view of the processing box of the present invention;

[0029] Figure 4 It is a schematic diagram of the internal structure of the processing box of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0031] Figure 6 is a top view of the pickling tank of the present invention;

[0032] Figure 7 It is a side view of the pickling tank of the present invention;

[0033] Figure 8 It is a schematic diagram of the transmission shaft installation structure of the present invention;

[0034] The accompanying drawings are marked as follows: front feeding guide roller platform 1, processing box 2, high-pressure water delivery pipe 3, rear feeding guide roller platform 4, base 5, pickling tank 6, discharge platform 7, guide platform 8, mounting frame 9, rotating motor 10, rotating seat 11, stand 12, clean water tank 13, water storage ring pipe 14, positioning ring 15, adjustable nozzle 16, connecting pipe 17, water guide hose 18, driving ring 19, driving motor 20, driving wheel 21, external transmission gear 22, Internal transmission gear 23, transmission wheel 24, first bevel gear 25, transmission screw 26, second bevel gear 27, slider 28, push rod 29, mounting seat 30, adjustment motor 31, water guide seat 32, high-pressure water treatment channel 33, slide cylinder 34, adjustment plate 35, Y-axis moving module 36, X-axis adjustment module 37, Y-axis adjustment module 38, clamping seat 39, conveying guide roller 40, pushing cylinder 41, slideway 42, transmission shaft 43. DETAILED DESCRIPTION

[0035] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0036] See also Figures 1-8 The present invention provides a technical solution: a method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment, comprising the following steps:

[0037] S1: taking a steel billet having the following weight components: C: 0.03-0.15%, Si: 0.25-0.5%, Mn: 0.5-0.8%, P: 0.005-0.010%, S: 0.003-0.012%, Cr: 0.10-0.50%, Mo: 0.5-1.2%, Cu: 0.005-0.40%, Ti: 0.005-0.04%, Al: 0.03-0.07%, Nb: 0.05-0.1%, V: 0.01-0.05%, Ni: 6-10%, and the rest being Fe as a raw material, putting the steel billet into a forging furnace for heating, heating and heat preservation, and then forging to obtain an underwater connector forging;

[0038] S2: The underwater connector forgings are pre-treated by a high-pressure water pre-treatment device to remove the oxidized surface of the forgings;

[0039] The high-pressure water pretreatment device includes a front feeding guide roller table 1, a treatment box 2, a high-pressure water delivery pipe 3 and a rear feeding guide roller table 4. The treatment box 2 is located between the discharge end of the front feeding guide roller table 1 and the feed end of the rear feeding guide roller table 4. The high-pressure water delivery pipe 3 is connected to the treatment box 2. The front feeding guide roller table 1 and the rear feeding guide roller table 4 are used to transport the underwater connector forgings. A high-pressure water treatment channel 33 for the underwater connector forgings to pass through is opened in the middle of the treatment box 2. A plurality of adjustable nozzles 16 are provided on the inner side of the high-pressure water treatment channel 33 for spraying high-pressure water towards the underwater connector forgings, wherein the plurality of adjustable nozzles 16 are directed toward the front feeding guide roller table 1 for a certain The inclined setting is as follows: when the front underwater connector forging moves to the rear feeding guide roller table 4 and the rear underwater connector forging has not yet moved to the high-pressure water treatment channel 33, the adjustable nozzle 16 is inclined toward the front feeding guide roller table 1, thereby reducing the impact of the high-pressure water jets sprayed by the upper and lower adjustable nozzles 16 on the adjustable nozzle 16 itself. At the same time, when the inclined high-pressure water jets are flushed, the high-pressure water jets will not directly rush to the internal structure of the treatment box 2, thereby preventing the internal structure of the treatment box 2 from being directly exposed to the impact environment of the high-pressure water jets. The high-pressure water is transported to the adjustable nozzle 16 through the high-pressure water delivery pipe 3 and sprayed out to remove the oxidized surface of the underwater connector forging;

[0040] After forging, the underwater connector forgings are sequentially conveyed to the high-pressure water treatment channel 33 of the treatment box 2 through the front feeding guide roller table 1. The external high-pressure water is conveyed to the adjustable nozzle 16 through the high-pressure water delivery pipe 3 and sprayed out, and the surface of the underwater connector forging passing through the high-pressure water treatment channel 33 is washed with high-pressure water. The high-pressure water forms a fan-shaped water jet with a large impact force through the adjustable nozzle 16 and hits the surface of the underwater connector forging. The oxidized surface of the underwater connector forging is cut, rapidly cooled and shrunk under the action of the fan-shaped water jet, and is peeled off from the underwater connector forging base material. At the same time, the fan-shaped water jet washes away the loosened oxidized surface, reducing the subsequent pickling time and improving the treatment efficiency of the oxidized surface of the underwater connector forging.

[0041] Furthermore, a plurality of groups of adjustable nozzles 16 may be provided on the mounting seat 30 located inside the high-pressure water treatment channel 33 of the treatment box 2. The plurality of groups of adjustable nozzles 16 are located on the same horizontal plane and are spaced a certain distance apart from each other. In the process of the underwater connector forging after forging being transported to the high-pressure water treatment channel 33 of the treatment box 2 through the front feeding guide roller table 1, the oxidized surface of the surface of the underwater connector forging is flushed by the plurality of groups of adjustable nozzles 16. Since the plurality of groups of adjustable nozzles 16 are spaced a certain distance apart from each other, the conveying speed of the underwater connector forging by the front feeding guide roller table 1 can be increased. While the plurality of groups of adjustable nozzles 16 fully flush the surface of the underwater connector forging, the speed of the high-pressure water treatment is increased, thereby reducing the time for subsequent pickling.

[0042] S3: The underwater connector forgings that have been pre-treated with high-pressure water are post-treated by a pickling device to subsequently treat the oxidized surface of the forgings;

[0043] The pickling device includes a guide table 8, a discharge table 7, a pickling tank 6 and a clamping mechanism. The guide table 8 is connected to the discharge end of the rear feeding guide roller table 4, and the discharge table 7 is connected to the guide table 8. The pickling tank 6 is arranged on one side of the discharge table 7 and is arranged parallel to the discharge table 7. The bottom of the pickling tank 6 is provided with an inclined conveying guide roller 40. The entrance of the conveying guide roller 40 is connected to the discharge table 7 through an inclined slideway 42. The discharge table 7 is provided with a pushing cylinder 41 for pushing the underwater connector forging coming out of the discharge port of the guide table 8 into the entrance of the conveying guide roller 40 along the slideway 42. The entrance of the conveying guide roller 40 is higher than the outlet. The clamping mechanism is located above the outlet of the conveying guide roller 40 and is used to move the underwater connector forging conveyed to the outlet of the conveying guide roller 40 out of the pickling tank 6;

[0044] After being rinsed with high-pressure water, the underwater connector forgings are continuously conveyed through the rear feeding guide roller table 4 in sequence, and the underwater connector forgings are conveyed to the discharge table 7 through the guide table 8. The underwater connector forgings coming out of the discharge port of the guide table 8 are pushed into the entrance of the conveying guide roller 40 along the slide 42 by the pushing cylinder 41. The underwater connector forgings fall on the conveying guide roller 40 in sequence, and the batch-produced underwater connector forgings are conveyed by the conveying guide roller 40. When the underwater connector forgings are conveyed to the outlet of the conveying guide roller 40, the underwater connector forgings conveyed to the outlet of the conveying guide roller 40 are moved out of the pickling tank 6 by the clamping mechanism, so as to realize the pickling operation of the underwater connector forgings in sequence, thereby improving the efficiency of removing the oxidized surface of the underwater connector forgings, and facilitating the cleaning of the oxidized surface of the deep holes, grooves and other parts on the surface of the underwater connector forgings, thereby ensuring that the oxidized surface of the underwater connector forgings is fully cleaned;

[0045] The conveying guide roller 40 has a certain acid corrosion resistance effect, which ensures the normal operation of the conveying guide roller 40. Limit baffles are provided on both sides of the conveying guide roller 40 to limit the underwater connector forgings conveyed on the conveying guide roller 40, ensuring that the underwater connector forgings are stably conveyed in the pickling tank 6;

[0046] S4: heat treating the underwater connector forgings after pickling treatment, first normalizing the underwater connector forgings, then austenitizing and deep cold quenching, and then high temperature tempering;

[0047] S5: Performing nondestructive testing and machining on the heat-treated underwater connector forging to obtain a finished underwater connector.

[0048] In a further embodiment, adjustable baffles are provided on both sides of the slideway 42 , and adjusting cylinders are provided on both sides of the slideway 42 , and output ends of the adjusting cylinders are connected to adjacent adjustable baffles.

[0049] Through the above technical solution, the adjustable baffle is pushed to move by the adjustment cylinder, and then the distance between the two adjustable baffles is adjusted, and adapted according to the size of the underwater connector forging, so that the underwater connector forging slides stably on the slide 42.

[0050] In a further embodiment, the processing box 2 is provided with a nozzle adjustment mechanism for adjusting the position of the adjustable nozzle 16, and the nozzle adjustment mechanism includes a positioning ring 15 arranged in the processing box 2 and located outside the high-pressure water treatment channel 33. The positioning ring 15 is provided with a plurality of transmission screws 26 corresponding one-to-one with the adjustable nozzle 16. A slider 28 is threadedly connected to the transmission screw 26, and a push rod 29 is provided on the slider 28. One end of the push rod 29 is connected to the mounting seat 30, and a water guide seat 32 connected to the adjustable nozzle 16 is provided in the mounting seat 30. A water storage ring pipe 14 connected to the high-pressure water delivery pipe 3 is provided on the outside of the positioning ring 15, and a plurality of connecting pipes 17 are provided on the water storage ring pipe 14. The connecting pipe 17 is provided with a water guide hose 18 connected to the water guide seat 32. A driving mechanism for driving the transmission screw 26 to rotate is provided in the processing box 2.

[0051] Through the above technical solution, the driving mechanism drives the transmission screw 26 to rotate, so that the slider 28 moves on the transmission screw 26, and then the push rod 29 pushes the mounting seat 30 to move, so as to adjust the position of the adjustable nozzle 16. The external high-pressure water is transported to the water storage ring pipe 14 through the high-pressure water delivery pipe 3, and then transported to the connecting pipe 17, and then transported to the water guide seat 32 through the connecting pipe 17, and then transported to the adjustable nozzle 16. The position of the adjustable nozzle 16 is adjusted by the nozzle adjustment mechanism, and adjusted according to the size of the underwater connector forging, thereby improving the pretreatment of the oxidized surface of the forging surface, wherein the lateral dimension of the positioning ring 15 is matched with the lateral length of the high-pressure water treatment channel 33, thereby protecting the structure outside the positioning ring 15 in the processing box 2, reducing the impact of the water beam impact, and the push rod 29 and the mounting seat 30 have high structural strength and have a certain resistance to the impact of the high-pressure water beam.

[0052] In a further embodiment, the driving mechanism includes a driving ring 19 arranged on the outside of the water storage ring tube 14, and the outer surface of the driving ring 19 is circumferentially provided with external transmission teeth 22, and the inner surface of the driving ring 19 is circumferentially provided with internal transmission teeth 23. A driving motor 20 is provided in the processing box 2, and the output end of the driving motor 20 is connected to the driving wheel 21, and the driving wheel 21 is engaged with the external transmission teeth 22. A transmission shaft 43 is installed on one side of several transmission screws 26 in the processing box 2 through a transmission seat, wherein the transmission seat is fixed in the processing box 2, and the transmission shaft 43 can rotate on the transmission seat. A transmission wheel 24 is fixedly sleeved on the transmission shaft 43, and the transmission wheel 24 is engaged with the internal transmission teeth 23. A first bevel gear 25 is also fixedly sleeved on the transmission shaft 43, and a second bevel gear 27 that is engaged with the first bevel gear 25 is fixedly sleeved on the transmission screw 26.

[0053] Through the above technical solution, the driving motor 20 drives the driving wheel 21 to rotate, and then drives the driving ring 19 to rotate through the outer transmission teeth 22, and then drives the driving wheel 24 to rotate through the inner transmission teeth 23, and then drives the transmission wheel 24 to rotate. The rotation of the transmission shaft 43 drives the first bevel gear 25 to rotate, and then drives the transmission screw 26 to rotate through the second bevel gear 27, wherein a plurality of guide wheels are installed on the outside of the driving ring 19 in the processing box 2 through the guide shaft, and the guide wheels are engaged with the inner transmission teeth 23, and the driving ring 19 is ensured to rotate stably when the driving motor 20 drives the driving wheel 21 to rotate; wherein an annular groove is opened in the processing box 2 to cooperate with the driving ring 19. During the rotation of the driving ring 19, the rotation of the driving ring 19 is stably achieved by the setting of the annular groove. At the same time, a plurality of transmission shafts 43 cooperate with the transmission wheel 24, which plays a transmission role while supporting the driving ring 19 to ensure the stable rotation of the driving ring 19.

[0054] In a further embodiment, an adjusting motor 31 is provided in the mounting seat 30 , and an output end of the adjusting motor 31 is connected to the water guide seat 32 .

[0055] Through the above technical solution, the water guide seat 32 is driven to rotate by adjusting the motor 31, and then the adjustable nozzle 16 is driven to rotate to adjust the angle, which is convenient for adjusting the angle of the adjustable nozzle 16 according to the different underwater connector forgings before the underwater connector forging passes through the high-pressure water treatment channel 33, thereby adjusting the high-pressure water flushing angle.

[0056] Before the underwater connector forging passes through the high-pressure water treatment channel 33, depending on the different underwater connector forgings, the driving motor 20 drives the driving wheel 21 to rotate, and then the outer transmission gear 22 drives the driving ring 19 to rotate, and then the inner transmission gear 23 drives the transmission wheel 24 to rotate, and then the transmission wheel 24 drives the transmission shaft 43 to rotate, and then the first bevel gear 25 is driven to rotate by the rotation of the transmission shaft 43, and then the transmission screw 26 is driven to rotate by the second bevel gear 27, so that the slider 28 moves on the transmission screw 26, and then the push rod 29 pushes the mounting seat 30 to move, and the moving distance of the adjustable nozzle 16 is uniformly adjusted. At the same time, the water guide seat 32 is driven to rotate by the adjusting motor 31, and then the adjustable nozzle 16 is driven to rotate to adjust the angle. After the adjustment is completed, the subsequent high-pressure water removal of the oxidized surface of the forging is carried out.

[0057] In a further embodiment, the clamping mechanism includes a mounting frame 9 provided above the pickling tank 6, and a slide cylinder 34 is symmetrically provided on the mounting frame 9. The output end of the slide cylinder 34 is connected to the adjustment plate 35. A Y-axis moving module 36 is provided at the bottom of the adjustment plate 35, and an X-axis adjustment module 37 is provided at the bottom of the Y-axis moving module 36. Two Y-axis adjustment modules 38 are symmetrically provided at the bottom of the X-axis adjustment module 37, and two clamping seats 39 are symmetrically provided at the bottom of the Y-axis adjustment module 38. The Y-axis moving module 36 is used to adjust the position of the X-axis adjustment module 37 in the Y-axis direction, the X-axis adjustment module 37 is used to adjust the distance between the two Y-axis adjustment modules 38, and the Y-axis adjustment module 38 is used to adjust the distance between the two clamping seats 39.

[0058] In step S3 , a feeding channel is provided on the guide table 8 for the underwater connector forgings conveyed from the discharge end of the rear feed guide roller table 4 to pass through, and the upper surface of the discharge table 7 and the lower edge of the feeding channel are located on the same horizontal plane.

[0059] Through the above technical solution, the distance between the two Y-axis adjustment modules 38 is adjusted by the X-axis adjustment module 37, and the distance between the two clamping seats 39 is adjusted by the Y-axis adjustment module 38. The adjustment is made according to the size of the underwater connector forging to facilitate the clamping of the underwater connector forging. The adjustment plate 35 is driven up and down by the slide cylinder 34, and the position of the X-axis adjustment module 37 in the Y-axis direction is adjusted by the Y-axis moving module 36 to facilitate the removal of the underwater connector forging that arrives at the outlet of the conveying guide roller 40 after pickling.

[0060] In a further embodiment, the Y-axis moving module 36 includes a Y-axis moving frame, the Y-axis moving frame is provided with a Y-axis moving motor, the output end of the Y-axis moving motor is connected to the Y-axis moving screw, the X-axis adjustment module 37 includes an X-axis adjustment frame, the X-axis adjustment frame is threadedly connected to the Y-axis moving screw, the X-axis adjustment frame is provided with an X-axis adjustment motor, the output end of the X-axis adjustment motor is connected to the X-axis bidirectional screw, the Y-axis adjustment module 38 includes a Y-axis adjustment frame, two Y-axis adjustment frames are respectively threadedly connected to the threaded sections of the X-axis bidirectional screw with opposite rotation directions, the Y-axis adjustment frame is provided with a Y-axis adjustment motor, the output end of the Y-axis adjustment motor is connected to the Y-axis bidirectional screw, and two clamping seats 39 are respectively threadedly connected to the threaded sections of the Y-axis bidirectional screw with opposite rotation directions.

[0061] Through the above technical solution, the X-axis bidirectional screw is driven to rotate by the X-axis adjusting motor, so that the two Y-axis adjusting frames are moved closer to or away from each other, and the spacing between the two Y-axis adjusting frames is adjusted. The Y-axis bidirectional screw is driven to rotate by the Y-axis adjusting motor, so that the two clamping seats 39 are moved closer to or away from each other, and the spacing between the two clamping seats 39 is adjusted. It is adjusted according to the size of the underwater connector forging to facilitate the clamping of the underwater connector forging. The adjustment plate 35 is driven up and down by the slide cylinder 34, and the Y-axis moving screw is driven to rotate by the Y-axis moving motor to adjust the position of the X-axis adjusting frame in the Y-axis direction, so that the underwater connector forging that reaches the outlet of the conveying guide roller 40 after pickling is conveniently removed for subsequent processing.

[0062] In a further embodiment, a base 5 is provided at the bottom of the pickling tank 6, a clean water tank 13 is provided at the top of the base 5 located on one side of the pickling tank 6, a rotating motor 10 is provided at the top of the base 5 located between the pickling tank 6 and the clean water tank 13, the output end of the rotating motor 10 is connected to the rotating seat 11, a vertical frame 12 is fixed on the top of the rotating seat 11, and the mounting frame 9 is fixed on the vertical frame 12.

[0063] Through the above technical solution, the pickling of the underwater connector forgings in the pickling tank 6 is completed, and the underwater connector forgings are clamped out by the clamping mechanism, and the rotating seat 11 is driven to rotate by the rotating motor 10, and then the mounting frame 9 is driven to rotate by the vertical frame 12, and the mounting frame 9 is rotated to the top of the clean water tank 13, and then the underwater connector forgings are placed in the clean water tank 13 for clean water cleaning through the clamping mechanism, which is convenient for subsequent processing of the underwater connector forgings.

[0064] In a further embodiment, the conveying guide roller 40 is tilted downward at an angle of 5-10°, and the slideway 42 is tilted downward at an angle of 50-70°.

[0065] Through the above technical solution, the conveying guide roller 40 is set to be tilted downward, which facilitates the transportation of the underwater connector forgings on the conveying guide roller 40. The slide 42 is set to be tilted downward to ensure that the underwater connector forgings slide to the entrance of the conveying guide roller 40 through the slide 42.

[0066] In a further embodiment, a rotation groove cooperating with the driving ring 19 is provided in the processing box 2 .

[0067] Through the above technical solution, the rotation of the driving ring 19 is facilitated by the provision of the rotation groove.

[0068] In a further embodiment, the adjustable nozzle 16 is an elliptical nozzle.

[0069] Through the above technical solution, the elliptical nozzle is set to make the spray water flow have a certain scattering angle, which facilitates the removal of the oxidized surface.

[0070] The preferred specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment, characterized in that: The following steps are involved: S1: taking a steel billet having the following weight components: C: 0.03-0.15%, Si: 0.25-0.5%, Mn: 0.5-0.8%, P: 0.005-0.010%, S: 0.003-0.012%, Cr: 0.10-0.50%, Mo: 0.5-1.2%, Cu: 0.005-0.40%, Ti: 0.005-0.04%, Al: 0.03-0.07%, Nb: 0.05-0.1%, V: 0.01-0.05%, Ni: 6-10%, and the rest being Fe as a raw material, putting the steel billet into a forging furnace for heating, heating and heat preservation, and then forging to obtain an underwater connector forging; S2: The underwater connector forgings are pre-treated by a high-pressure water pre-treatment device to remove the oxidized surface of the forgings; The high-pressure water pretreatment device comprises a front feeding guide roller platform (1), a treatment box (2), a high-pressure water delivery pipe (3) and a rear feeding guide roller platform (4); the treatment box (2) is located between the discharge end of the front feeding guide roller platform (1) and the feed end of the rear feeding guide roller platform (4); the high-pressure water delivery pipe (3) is connected to the treatment box (2); the front feeding guide roller platform (1) and the rear feeding guide roller platform (4) are used to transport underwater connector forgings; a high-pressure water treatment channel (33) for the underwater connector forgings to pass through is provided in the middle of the treatment box (2); a plurality of adjustable nozzles (16) are provided on the inner side of the high-pressure water treatment channel (33) for spraying high-pressure water towards the underwater connector forgings; S3: The underwater connector forgings that have been pre-treated with high-pressure water are post-treated by a pickling device to subsequently treat the oxidized surface of the forgings; The pickling device comprises a material guide table (8), a material discharge table (7), a pickling tank (6) and a material clamping mechanism, wherein the material guide table (8) is connected to the discharge end of the rear feed guide roller table (4), the material discharge table (7) is connected to the material guide table (8), the pickling tank (6) is arranged on one side of the material discharge table (7) and is arranged parallel to the material discharge table (7), the bottom of the pickling tank (6) is provided with a conveying guide roller (40) in an inclined state, and the inlet of the conveying guide roller (40) is connected to the material discharge table (7). The platforms (7) are connected by an inclined slideway (42), and the unloading platform (7) is provided with a pushing cylinder (41) for pushing the underwater connector forgings coming out of the discharge port of the guide platform (8) along the slideway (42) into the inlet of the conveying guide roller (40), the inlet of the conveying guide roller (40) is higher than the outlet, and the clamping mechanism is located above the outlet of the conveying guide roller (40) and is used to move the underwater connector forgings conveyed to the outlet of the conveying guide roller (40) out of the pickling tank (6); S4: heat treating the underwater connector forging after pickling treatment, first normalizing the underwater connector forging, austenitizing and deep cold quenching after normalizing, and then high temperature tempering; S5: Performing nondestructive testing and machining on the heat-treated underwater connector forging to obtain a finished underwater connector.

2. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 1, characterized in that: Adjustable baffles are provided on both sides of the slideway (42), and regulating cylinders are provided on both sides of the slideway (42), and the output ends of the regulating cylinders are connected to adjacent adjustable baffles.

3. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 1, characterized in that: The treatment box (2) is provided with a nozzle adjustment mechanism for adjusting the position of the adjustable nozzle (16), the nozzle adjustment mechanism comprising a positioning ring (15) provided in the treatment box (2) and located outside the high-pressure water treatment channel (33), the positioning ring (15) being provided with a plurality of transmission screws (26) corresponding to the adjustable nozzles (16), the transmission screws (26) being threadedly connected with a slider (28), the slider (28) being provided with a push rod (29), the push rod (29) being provided with a plurality of transmission screws (26) corresponding to the adjustable nozzles (16), the transmission screws (26) being threadedly connected with a slider (28), the slider (28) being provided with a push rod (29), the push rod (29) being provided with a plurality of transmission screws (26) corresponding to the adjustable nozzles (16), the transmission screws (26) being threadedly connected with the slider (28), the push rod (29 ... ) is connected to a mounting seat (30), a water guide seat (32) connected to an adjustable nozzle (16) is provided in the mounting seat (30), a water storage ring (14) connected to a high-pressure water delivery pipe (3) is provided on the outside of the positioning ring (15), a plurality of connecting pipes (17) are provided on the water storage ring (14), a water guide hose (18) connected to the water guide seat (32) is provided on the connecting pipe (17), and a driving mechanism for driving the transmission screw (26) to rotate is provided in the processing box (2).

4. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 3, characterized in that: The driving mechanism comprises a driving ring (19) arranged outside the water storage ring tube (14), the outer surface of the driving ring (19) is provided with external transmission teeth (22) in the circumferential direction, the inner surface of the driving ring (19) is provided with internal transmission teeth (23) in the circumferential direction, a driving motor (20) is provided in the processing box (2), the output end of the driving motor (20) is connected to a driving wheel (21), the driving wheel (21) and the external transmission teeth (22) are meshed with each other, a transmission shaft (43) is respectively installed on one side of a plurality of the transmission screws (26) in the processing box (2) through a transmission seat, a transmission wheel (24) is fixedly sleeved on the transmission shaft (43), the transmission wheel (24) and the internal transmission teeth (23) are meshed with each other, a first bevel gear (25) is also fixedly sleeved on the transmission shaft (43), and a second bevel gear (27) meshed with the first bevel gear (25) is fixedly sleeved on the transmission screw (26).

5. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 1, characterized in that: The clamping mechanism includes a mounting frame (9) arranged above the outlet of the conveying guide roller (40), a slide cylinder (34) is symmetrically arranged on the mounting frame (9), the output end of the slide cylinder (34) is connected to the adjustment plate (35), a Y-axis moving module (36) is provided at the bottom of the adjustment plate (35), an X-axis adjustment module (37) is provided at the bottom of the Y-axis moving module (36), two Y-axis adjustment modules (38) are symmetrically provided at the bottom of the X-axis adjustment module (37), two clamping seats (39) are symmetrically provided at the bottom of the Y-axis adjustment module (38), the Y-axis moving module (36) is used to adjust the position of the X-axis adjustment module (37) in the Y-axis direction, the X-axis adjustment module (37) is used to adjust the spacing between the two Y-axis adjustment modules (38), and the Y-axis adjustment module (38) is used to adjust the spacing between the two clamping seats (39).

6. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 5, characterized in that: The Y-axis moving module (36) includes a Y-axis moving frame, a Y-axis moving motor is provided on the Y-axis moving frame, and the output end of the Y-axis moving motor is connected to the Y-axis moving screw. The X-axis adjustment module (37) includes an X-axis adjustment frame, the X-axis adjustment frame is threadedly connected to the Y-axis moving screw, the X-axis adjustment frame is provided with an X-axis adjustment motor, and the output end of the X-axis adjustment motor is connected to the X-axis bidirectional screw. The Y-axis adjustment module (38) includes a Y-axis adjustment frame, two Y-axis adjustment frames are respectively threadedly connected to the threaded sections of the X-axis bidirectional screw with opposite rotation directions, the Y-axis adjustment frame is provided with a Y-axis adjustment motor, and the output end of the Y-axis adjustment motor is connected to the Y-axis bidirectional screw. The two clamping seats (39) are respectively threadedly connected to the threaded sections of the Y-axis bidirectional screw with opposite rotation directions.

7. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 5, characterized in that: A base (5) is provided at the bottom of the pickling tank (6), a clean water tank (13) is provided at the top of the base (5) located on one side of the pickling tank (6), a rotating motor (10) is provided at the top of the base (5) located between the pickling tank (6) and the clean water tank (13), an output end of the rotating motor (10) is connected to a rotating seat (11), a stand (12) is fixed on the top of the rotating seat (11), and the mounting frame (9) is fixed on the stand (12).

8. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 1, characterized in that: The conveying guide roller (40) is tilted downward at an angle of 5-10°, and the slideway (42) is tilted downward at an angle of 50-70°.

9. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 4, characterized in that: A rotation groove matched with the driving ring (19) is provided in the processing box (2).

10. The method for manufacturing a high-strength, corrosion-resistant iron-based + nickel-based duplex steel underwater connector for deep-sea oil and gas equipment according to claim 4, characterized in that: An adjusting motor (31) is provided in the mounting seat (30), and an output end of the adjusting motor (31) is connected to a water guide seat (32).

Images