A high-temperature aging strengthening heat treatment equipment for a nuclear power half-speed steam turbine generator screw rod

Abstract

The present application relates to the technical fields of screw heat treatment, and discloses a high-temperature aging strengthening heat treatment equipment for nuclear power half-speed steam turbine generator screw, which comprises an aging furnace, a suspension frame and a plurality of screw bodies to be heat treated, and comprises a suspension mechanism arranged on the suspension frame and comprising a plurality of suspension assemblies, an air charging device and a plurality of fan blades, each of the suspension assemblies is provided with a plurality of nozzles which are interconnected and oriented differently. The high-temperature aging strengthening heat treatment equipment for nuclear power half-speed steam turbine generator screw forms an inert gas wall around the screw body through the air injection ports of the suspension assemblies, and the air injection ports are used to accurately spray inert gas to the surface of the screw, and the rotation of the fan blades drives the gas to move closer to the screw, so that the three work together to solve the defects in the prior art that the inert gas is not guided in a certain direction, is easy to gather in the upper part of the furnace and has a coverage blind area, and realize the oxygen isolation of the screw in all directions without dead angle.

Description

Technical Field

[0001] This invention relates to the field of screw heat treatment technology, specifically to a high-temperature aging-enhancing heat treatment device for the screw of a nuclear power half-speed steam turbine generator. Background Technology

[0002] In the high-temperature aging strengthening heat treatment of screw compressors for half-speed nuclear power turbine generators, an aging furnace is required as the core, supplemented by multiple auxiliary structures, to ensure uniform heating of the screw compressor during high-temperature aging, thereby enhancing its high-temperature strength and creep resistance. When heating or slowly cooling the screw compressor in the aging furnace, some furnaces will introduce inert gas to prevent the screw compressor from reacting with oxygen at high temperatures, thus avoiding the formation of oxide scale or rust layers and improving the quality of the screw compressor after heat treatment.

[0003] In existing technologies, when inert gas is introduced into an aging furnace, there is no directional guiding structure; it can only fill the furnace chamber through natural diffusion. However, thermal convection and dead zones exist within the furnace, causing the introduced inert gas to tend to accumulate in the upper part of the furnace chamber, while the bottom of the screw and the side facing away from the air inlet have thinner gas, forming local unprotected areas that cannot effectively isolate the screw from oxygen. Furthermore, simply introducing inert gas requires maintaining a slight positive pressure throughout the furnace to prevent air infiltration, resulting in a large amount of gas escaping disorderly from the furnace door seals and exhaust ports. Most of the inert gas fills the unused spaces within the furnace chamber, with only a small amount actually acting on the screw surface, causing significant losses. Summary of the Invention

[0004] (a) Technical problems to be solved:

[0005] To address the shortcomings of existing technologies, this invention provides a high-temperature aging-enhancing heat treatment device for the screw of a nuclear power half-speed steam turbine generator, which solves the problems mentioned in the background technology, such as low utilization rate of inert gas and difficulty in effectively encapsulating the screw and isolating it from oxygen.

[0006] (II) Technical Solution:

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature aging intensification heat treatment device for the screw of a nuclear power half-speed steam turbine generator, comprising an aging furnace, a suspension frame, and several screw bodies to be heat treated, including:

[0008] The suspension mechanism, mounted on the suspension frame, includes several suspension components, an air-filling device, and several fan blades. Each suspension component is provided with several interconnected nozzles facing different directions. The suspension mechanism is used to fix several screw bodies to the inner side of the corresponding suspension component and control the air-filling device to spray inert gas on the outside of the screw body through several nozzles to isolate the screw body from the oxygen inside the aging furnace.

[0009] The power mechanism includes several drive motors, all mounted on the top of the aging furnace, which drive the corresponding suspension mechanism to rotate, thereby improving the heat uniformity of the screw body during heat treatment. The rotation of the fan blades also drives the inert gas sprayed from the nozzle to uniformly surround the outer side of the corresponding screw body.

[0010] Preferably, the suspension mechanism further includes a hanger assembly, the hanger assembly comprising:

[0011] Several rotating disks, arranged in a ring, are rotatably connected to the top inner side of the suspension frame;

[0012] Several fixed blocks are evenly distributed on the top of the corresponding rotating disks and are fixedly connected to the rotating disks;

[0013] Several threaded fixing rods are threadedly connected to the corresponding fixing blocks, and are used to change the contact state with the suspension assembly by rotating themselves.

[0014] Preferably, the suspension assembly further includes:

[0015] The upper fixing plate has an internal cavity, and the top side wall has several circular slots corresponding to the threaded fixing rods. These slots are used to allow the threaded fixing rods to enter the circular slots when they come into contact with the upper fixing plate, thereby improving the fixing effect of the threaded fixing rods on the suspension assembly.

[0016] Several vents are provided, with no fewer than two, each located on the top of the upper fixed plate, connecting the internal cavity of the upper fixed plate to the outside.

[0017] The lower fixing plate has an internal cavity located directly below the upper fixing plate;

[0018] A plurality of connecting rods are provided, not less than four, and each of them is fixedly connected at one end to the bottom of the upper fixed plate and at the other end to the top of the lower fixed plate. The connecting rods connect the upper fixed plate and the lower fixed plate.

[0019] Several inflatable rods are provided, with no fewer than two rods, each having one end fixedly connected to the bottom of the upper fixed plate and the other end fixedly connected to the top of the lower fixed plate. The inflatable rods connect the upper fixed plate and the lower fixed plate.

[0020] Preferably, the suspension assembly further includes:

[0021] Several jet nozzles are respectively disposed on the two side walls of the corresponding connecting rod and symmetrically distributed along the central axis of the screw body fixed in the middle of the suspension assembly, for spraying inert gas on the outside of the screw body to form an inert gas wall surrounding the outside of the screw body.

[0022] Several inflation ports are respectively provided on the side wall of the corresponding inflation rod, and the output ends of the ports are all facing the screw body. They are used to spray inert gas into the screw body and fill the area between the screw body and the inert gas wall.

[0023] Preferably, the extension lines of the gas outlet side of the plurality of jet nozzles included in the suspension assembly intersect to form a closed pattern.

[0024] Preferably, the suspension assembly includes a plurality of inflatable rods located inside a closed pattern formed by a plurality of air nozzles.

[0025] Preferably, the suspension assembly further includes:

[0026] Two fan blades are fixedly connected to the bottom of the upper fixed plate and the bottom of the lower fixed plate, respectively, and are used to drive the inert gas outside the screw body to move towards the screw body when the suspension assembly rotates;

[0027] A fixing wire is provided at the bottom of the upper fixing plate and is tied to the outside of the screw body to fix the screw body between the upper fixing plate and the lower fixing plate.

[0028] Preferably, the power mechanism further includes:

[0029] Several connecting discs, each with an internal cavity, are fixedly connected to the power output end of the corresponding drive motor and communicate with the air filling device. The connecting discs extend into the interior of the aging furnace and are located on the top of the corresponding hanging assembly.

[0030] Several connecting protrusions are formed at the bottom of the corresponding connecting plate and communicate with the internal cavity of the connecting plate. They protrude outward from the bottom of the connecting plate and are used to insert into the corresponding air port to connect the inflation device and the corresponding upper fixed plate, and to transmit the torque of the drive motor.

[0031] Preferably, the suspension assembly further includes a collection mechanism disposed inside the lower fixed plate, the collection mechanism comprising:

[0032] Several collecting arc blocks, wherein the collecting arc blocks have an arc-shaped structure and an "L"-shaped cross-section, and the several collecting arc blocks form an "L"-shaped ring;

[0033] Several elastic elements are disposed between the collecting arc block and the inner wall of the lower fixed plate, with one end fixedly connected to the collecting arc block and the other end fixedly connected to the inner wall of the lower fixed plate, for providing the collecting arc block with a clamping force on the screw body.

[0034] Preferably, the bottom horizontal end of the collecting arc block is clamped to the bottom of the screw body.

[0035] (III) Beneficial Effects:

[0036] The high-temperature aging strengthening heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator provided by the present invention has the following beneficial effects:

[0037] 1. This high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator forms an inert gas wall around the screw body through the jet nozzle of the suspension component. Combined with the gas filling port, inert gas is precisely injected onto the screw surface. Then, the fan blade rotation drives the gas to move closer to the screw. The three work together to solve the defects of the existing technology, such as the inert gas not being guided in a specific direction, easily accumulating in the upper part of the furnace and having a blind spot, so as to achieve oxygen isolation of the screw in all directions without dead angles.

[0038] 2. The high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator uses a drive motor of the power mechanism to drive the suspension mechanism to rotate as a whole, so that each surface of the screw alternately faces the heat source. At the same time, during the rotation, the fan blades push the inert gas to circulate evenly. The two work together to improve the heating uniformity of the screw, thereby making up for the shortcomings of the existing technology that relies solely on natural heat conduction, which leads to uneven local heating of the screw, and ensuring the consistency of the screw performance after heat treatment.

[0039] 3. This high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator reduces gas escape through the barrier effect of the inert gas wall, and uses a directional injection design to concentrate the gas on the screw surface. It does not require maintaining a slight positive pressure throughout the furnace. The two work together to reduce the ineffective filling of inert gas in the empty space of the furnace, thereby solving the problems of high inert gas loss and low utilization rate in the existing technology and saving gas usage costs.

[0040] 4. This high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator uses an L-shaped arc-shaped collecting block in the collecting mechanism. With the continuous clamping force provided by the elastic component, the block can tightly surround the bottom of the screw body, assisting in fixing the screw body. During the heat treatment of the screw body, the equipment can collect and collect the oxide scale debris that falls off in real time, preventing the debris from falling into the gaps inside the aging furnace and making it difficult to clean. This solves the defects of existing technologies where oxide scale debris pollutes the furnace environment and increases the difficulty of furnace cleaning, thereby reducing the workload and cost of subsequent furnace maintenance. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the internal structure of the aging furnace of the present invention;

[0043] Figure 3 This is a schematic diagram of the connection structure between the power mechanism and the inflation device of the present invention;

[0044] Figure 4 This is a schematic diagram of the overall structure of the suspension mechanism of the present invention;

[0045] Figure 5 This is a partial schematic diagram of the suspension assembly structure of the present invention;

[0046] Figure 6 This is a schematic diagram of the overall structure of the hanging device assembly and the collection mechanism of the present invention;

[0047] Figure 7 This is a schematic cross-sectional view of the overall structure of the hanging device assembly and the collection mechanism of the present invention;

[0048] Figure 8 This is a schematic diagram of the connection structure between the connecting rod and the jet nozzle of the present invention;

[0049] Figure 9 This is a schematic diagram of the connection structure between the inflation rod and the inflation port of the present invention;

[0050] Figure 10 This is a schematic cross-sectional view of the upper part of the hanging fixture assembly of the present invention;

[0051] Figure 11 This is a schematic cross-sectional view of the lower half of the mounting bracket assembly of the present invention;

[0052] Figure 12 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0053] Figure 13 This is a schematic diagram of the connection structure between the collecting mechanism and the screw body of the present invention.

[0054] In the diagram: 10. Aging furnace; 20. Hanging frame;

[0055] Hanging fixture components: 21. Rotating disc; 22. Fixing block; 23. Threaded fixing rod;

[0056] Power mechanism: 31. Drive motor; 32. Connecting disc; 33. Connecting protrusion;

[0057] Suspension mechanism: 30, inflation device; 40, upper fixing plate; 41, air vent; 50, connecting rod; 51, air jet; 60, inflation rod; 61, inflation port; 70, lower fixing plate; 80, fan blade; 90, fixing screw;

[0058] Collection mechanism: 100, collecting arc block; 101, elastic component;

[0059] 110. Screw body. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Example 1

[0062] refer to Figures 1 to 11 A high-temperature aging intensification heat treatment apparatus for the screw of a nuclear power half-speed steam turbine generator according to a preferred embodiment of the present invention will be described in detail below: it includes an aging furnace 10, a suspension frame 20, and several screw bodies 110 to be heat treated, including:

[0063] The suspension mechanism, mounted on the suspension frame 20, includes several suspension components, an air filling device 30, and several fan blades 80. Each suspension component is equipped with several interconnected nozzles facing different directions. The suspension mechanism is used to fix several screw bodies 110 inside the corresponding suspension components and control the air filling device 30 to spray inert gas on the outside of the screw body 110 through several nozzles, isolating the screw body 110 from the oxygen inside the aging furnace 10. The nozzles include a jet nozzle 51 and an air filling port 61. The inert gas sprayed through the jet nozzle 51 and the air filling port 61 covers the outside of the screw body 110, thereby reducing the oxygen content on the outside of the screw body 110 and preventing the screw body 110 from contacting oxygen and causing an oxidation reaction. This solves the problem of blind spots in the existing technology where inert gas is injected at a single location.

[0064] The power mechanism includes several drive motors 31, each mounted on top of the aging furnace 10, which drive the corresponding suspension mechanism to rotate, so that each surface of the screw body 110 alternately faces the heat source, avoiding uneven heating in certain areas and improving the heat uniformity of the screw body 110 during heat treatment. The rotation of the fan blades 80 drives the inert gas sprayed from the nozzle to evenly surround the outside of the corresponding screw body 110, forming a directional airflow. This breaks the limitation of natural diffusion of inert gas, allowing the inert gas to actively surround the screw body 110, further eliminating areas of inert gas scarcity.

[0065] The suspension mechanism also includes a hanger assembly, which includes:

[0066] A plurality of rotating discs 21, which are annular and all rotatably connected to the top of the inner side of the hanger 20, are configured to synchronously rotate with the suspension assembly fixed by themselves after the connecting boss 33 is inserted into the corresponding vent 41, so as to always fix the suspension assembly. An arc-shaped chute with a "⊥" cross-section can be formed at the top of the hanger 20, and an arc-shaped sliding strip with a "⊥" cross-section can be formed at the bottom of the rotating disc 21, so that the rotating disc 1 does not deviate while sliding on the top of the hanger 20.

[0067] A plurality of fixing blocks 22 are evenly distributed on the top of the corresponding rotating disc 21 and are fixedly connected to the rotating disc 21. The evenly distributed fixing blocks 22 can provide symmetric mounting points for the threaded fixing rods 23, so as to ensure uniform fixing force on the suspension assembly in subsequent steps and prevent the suspension assembly from deviating due to uneven force during rotation.

[0068] A plurality of threaded fixing rods 23 are all in threaded connection with the corresponding fixing blocks 22, and are configured to change the contact state with the suspension assembly by rotating themselves. Specifically, the compression degree of the threaded fixing rods 23 against the suspension assembly can be precisely controlled by rotating the threaded fixing rods 23, which not only ensures firm fixation, but also avoids damage to the suspension assembly caused by excessive extrusion, and facilitates subsequent disassembly and replacement of the suspension assembly.

[0069] The suspension assembly further comprises:

[0070] An upper fixing disc 40 is internally provided with a cavity, and the top side wall is provided with a plurality of circular clamping slots corresponding to the threaded fixing rods 23. The circular clamping slots are configured to allow the corresponding threaded fixing rods 23 to enter the circular clamping slots when contacting the upper fixing disc 40, so as to improve the fixing effect of the threaded fixing rods 23 on the suspension assembly. The cavity inside the upper fixing disc 40 is a temporary storage and shunting space for inert gas. The inert gas enters the cavity of the upper fixing disc 40 through the inflator 30, the connecting disc 32 and the connecting boss 33, then enters the connecting rod 50 and the inflating rod 60 through the upper fixing disc 40, and is ejected through the gas injection port 51 and the gas inflation port 61.

[0071] A plurality of vents 41 are arranged to be no less than two, so that the drive motor 31 can drive the entire suspension assembly to rotate through the connecting boss 33 extending into the vents 41, and at the same time, the filling speed of the inert gas can be accelerated, so that the cavity of the upper fixing disc 40 is quickly filled with the inert gas and shunted. The plurality of vents 41 are all opened at the top of the upper fixing disc 40, communicating the internal cavity of the upper fixing disc 40 with the outside;

[0072] A lower fixing disc 70 is internally provided with a cavity, is located directly below the upper fixing disc 40, corresponds to the upper fixing disc 40, and jointly forms the suspension assembly and the main support structure. The internal cavity can cooperate with the cavity of the upper fixing disc 40 to realize gas circulation and replenishment, and at the same time provide a mounting base for each structure of the suspension assembly.

[0073] Several connecting rods 50 are provided, with no fewer than four, to form an inert gas wall and to ensure the connection strength between the upper fixed plate 40 and the lower fixed plate 70. Each connecting rod 50 is fixedly connected at one end to the bottom of the upper fixed plate 40 and at the other end to the top of the lower fixed plate 70. The connecting rods 50 connect the upper fixed plate 40 and the lower fixed plate 70.

[0074] Several inflation rods 60 are provided, with no fewer than two, to quickly fill the space between the screw body 110 and the inert gas wall. Their distribution positions can complement those of the connecting rods 50, allowing the inert gas to be delivered more evenly around the screw body 110. Each inflation rod is fixedly connected at one end to the bottom of the upper fixed plate 40 and at the other end to the top of the lower fixed plate 70. The inflation rods 60 connect the upper fixed plate 40 and the lower fixed plate 70.

[0075] The suspension components also include:

[0076] Several jet nozzles 51 are respectively disposed on the two side walls of the corresponding connecting rods 50 and symmetrically distributed along the central axis of the screw body 110 fixed in the middle of the suspension assembly, so that the inert gas ejected from the jet nozzles 51 forms a symmetrical airflow, ensuring that the inert gas wall uniformly surrounds the screw body 110 and the screw body 110 is located at the center of the inert gas wall, blocking external oxygen from entering the interior of the inert gas wall, which is equivalent to the first line of protection for the screw body 110. Several jet nozzles 51 are used to spray inert gas on the outside of the screw body 110 to form an inert gas wall surrounding the outside of the screw body 110.

[0077] Several inflation ports 61 are respectively set on the side wall of the corresponding inflation rod 60, with the output end facing the screw body 110. They are used to spray inert gas into the screw body 110, thereby achieving precise delivery of inert gas. This allows the inert gas to actively contact the screw body 110, reducing the oxygen content around the screw body 110 and filling the area between the screw body 110 and the inert gas wall, forming a second layer of protection. This prevents gaps from forming in this area due to the flow of inert gas, further improving the oxygen isolation effect.

[0078] The extension lines of the gas outlet side of the several jet nozzles 51 included in the suspension assembly intersect to form a closed pattern. The intersecting closed pattern allows the inert gas ejected from the jet nozzles 51 and the air inlet 61 to mix together, ensuring the integrity and sealing of the inert gas wall and preventing gaps that could lead to oxygen infiltration. This achieves all-round, no-dead-angle inert gas coverage and envelopment of the screw body 110.

[0079] The suspension assembly includes several inflatable rods 60 located inside the closed pattern formed by several air nozzles 51, so that the inert gas ejected through the air nozzles 61 can not only act directly on the screw surface, but also be within the protection range of the inert gas wall, reducing the escape of inert gas and improving the utilization rate of inert gas. At the same time, it increases the concentration of inert gas near the outside of the screw body 110, enhancing the protection effect.

[0080] The suspension components also include:

[0081] Two fan blades 80 are fixedly connected to the bottom of the upper fixed plate 40 and the bottom of the lower fixed plate 70, respectively. The fan blades 80 distributed vertically form an upward and downward airflow, which together pushes the inert gas toward the screw body 110, thereby improving the isolation effect of the inert gas. This is used to drive the inert gas outside the screw body 110 toward the screw body 110 when the suspension assembly rotates.

[0082] The fixing screw 90 is located at the bottom of the upper fixing plate 40 and is tied to the outside of the screw body 110. It can not only ensure that the screw body 110 is firmly fixed, but also reduce the obstruction of the surface of the screw body 110, so as to avoid affecting the inert gas coverage and heating uniformity. At the same time, it can be adapted to screw bodies 110 of different diameters and has a certain degree of versatility. It is used to fix the screw body 110 between the upper fixing plate 40 and the lower fixing plate 70.

[0083] The following is the complete working process and working principle of the above embodiments:

[0084] First, the annular rotating disk 21 of the hanger assembly is rotatably connected to the top inner side of the suspension frame 20. The threaded fixing rod 23 on the fixing block 22 is rotated and inserted into the circular slot of the upper fixing disk 40 to fix the suspension assembly. Then, the screw body 110 is fixed between the upper fixing disk 40 and the lower fixing disk 70 by the fixing screw 90. The inflation device 30 delivers inert gas to the internal cavity of the suspension assembly through the connecting disk 32 of the power mechanism, the connecting protrusion 33 and the inflation port 61 of the upper fixing disk 40. The inert gas is symmetrically sprayed through the air jets 51 on both sides of the connecting rod 50 to form an inert gas wall surrounding the screw body 110. At the same time, the inflation port 61 on the side wall of the inflation rod 60 precisely sprays inert gas onto the surface of the screw body 110 to fill the area between the gas wall and the screw body 110. At this time, the drive motor 31 of the power mechanism drives the suspension mechanism to rotate as a whole, so that all surfaces of the screw body 110 are heated evenly. Meanwhile, the fan blades 80 at the bottom of the upper fixed plate 40 and the lower fixed plate 70 rotate to form a directional airflow, pushing the inert gas towards the screw body 110, effectively isolating the screw body 110 from oxygen and preventing oxidation. This ensures the heat treatment effect.

[0085] Example 2

[0086] refer to Figures 1 to 3, Figure 7 , Figure 12 and Figure 13 The power mechanism also includes:

[0087] Several connecting discs 32 each have a cavity inside, which are fixedly connected to the power output end of the corresponding drive motor 31 and connected to the gas filling device 30. The connecting discs 32 extend into the aging furnace 10 and are located on the top of the corresponding hanging assembly. The cavity of the connecting disc 32 has both inert gas delivery and torque transmission functions.

[0088] Several connecting protrusions 33 are all opened at the bottom of the corresponding connecting plate 32 and communicate with the internal cavity of the connecting plate 32. They protrude outward from the bottom of the connecting plate 32 and are used to insert into the corresponding vent 41 to connect the inflation device 30 and the corresponding upper fixed plate 40, and transmit the torque of the drive motor 31. The connection between the connecting protrusions 33 and the vent 41 is plug-in, so as to ensure the transportation of inert gas and transmit torque through the cooperation of the connecting protrusions 33 and the vent 41, realizing the synchronous docking of power and gas delivery. The protruding design of the connecting protrusions 33 can not only transmit torque, but also facilitate quick installation and improve assembly efficiency.

[0089] The suspension assembly also includes a collection mechanism disposed inside the lower fixed plate 70, the collection mechanism comprising:

[0090] Several collecting arc blocks 100 are arranged in an arc shape with an "L"-shaped cross section. The collecting arc blocks 100 form an "L"-shaped ring to surround the bottom outer side of the screw body 110, thereby collecting the oxide scale debris that falls off the screw body 110 and preventing the oxide scale debris from falling into the aging furnace 10 and making it inconvenient to collect and clean.

[0091] Several elastic elements 101 are disposed between the collecting arc block 100 and the inner wall of the lower fixed plate 70, with one end fixedly connected to the collecting arc block 100 and the other end fixedly connected to the inner wall of the lower fixed plate 70. They are used to provide the collecting arc block 100 with a clamping force on the screw body 110. Thus, the clamping force of the collecting arc block 100 can be automatically adjusted by the elastic force of the elastic element 101 and the diameter of the screw body 110. This ensures the clamping stability of the screw body 110 and avoids excessive clamping that could damage the surface of the screw body 110. At the same time, the continuous action of the elastic force of the elastic element 101 can counteract the slight deformation of the screw body 110 at high temperature and maintain clamping stability.

[0092] The bottom horizontal end of the collecting arc block 100 is clamped to the bottom of the screw body 110, thereby stably clamping the bottom of the screw body 110. Together with the fixing screw 90 at the top of the screw body 110, it forms a bidirectional fixation for the screw body 110, further improving the installation stability of the screw body 110 in the suspension assembly and preventing the screw body 110 from sinking or shaking due to gravity during rotation or heat treatment.

[0093] The following is the complete working process and working principle of the above embodiments:

[0094] First, the connecting plate 32, which is connected to the inflation device 30 in the power mechanism, is inserted into the inflation port 61 of the upper fixed plate 40 of the suspension assembly through the connecting protrusion 33 at the bottom. This achieves both communication between the inflation device 30 and the internal cavity of the upper fixed plate 40, and also transmits torque after the drive motor 31 starts. The rotating plate 21 of the hanger assembly is screwed into the circular slot of the upper fixed plate 40 through the threaded fixing rod 23 on the fixing block 22, which securely fixes the suspension assembly. At the same time, the rotating plate 21 rotates on the top of the suspension frame 20 to ensure the rotational stability of the suspension assembly. Subsequently, the inert gas delivered by the inflation device 30 enters the cavity of the upper fixed plate 40 through the chamber of the connecting plate 32 and the connecting protrusion 33, and then flows to the connecting rod 50 and the inflation rod 60. It is sprayed through the jet nozzle 51 to form an inert gas wall surrounding the screw body 110. The inflation port 61 precisely sprays inert gas onto the surface of the screw body 110 to fill the inner area of ​​the gas wall. When the suspension assembly rotates, the fan blades 80 at the bottom of the upper fixed plate 40 and the lower fixed plate 70 rotate synchronously, causing the inert gas to gather towards the screw body 110, further improving the gas coverage effect. At the same time, the collection mechanism inside the lower fixed plate 70, through the clamping force provided by the elastic element 101, allows the ring composed of several arc-shaped collection blocks 100 to firmly clamp the bottom of the screw body 110, forming a bidirectional fixation with the fixing wire 90 at the bottom of the upper fixed plate 40, preventing the screw body 110 from shaking or sinking. The collection blocks 100 can also collect oxide scale debris that falls off the screw body 110. The drive motor 31 drives the suspension assembly to rotate as a whole, ensuring that the screw body 110 is heated evenly and that the inert gas is evenly surrounded by the screw body 110 under the action of the fan blades 80, achieving the effect of isolating oxygen and improving the quality of heat treatment.

[0095] 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 high-temperature aging intensification heat treatment device for the screw of a nuclear power half-speed steam turbine generator, comprising an aging furnace (10), a suspension frame (20), and several screw bodies (110) to be heat treated, characterized in that, include: The suspension mechanism, mounted on the suspension frame (20), includes several suspension components, an air filling device (30), and several fan blades (80). Each suspension component is provided with several interconnected nozzles facing different directions. The suspension mechanism is used to fix several screw bodies (110) to the inner side of the corresponding suspension components and to control the air filling device (30) to spray inert gas on the outside of the screw body (110) through several nozzles to isolate the screw body (110) from the oxygen inside the aging furnace (10). The power mechanism includes several drive motors (31) all located on the top of the aging furnace (10), which are used to drive the corresponding suspension mechanism to rotate through the drive motors (31), improve the heat uniformity of the screw body (110) during heat treatment, and drive the inert gas sprayed by the nozzle to uniformly surround the outside of the corresponding screw body (110) through the rotation of the fan blades (80). The suspension mechanism further includes a hanger assembly, the hanger assembly comprising: Several rotating disks (21) are in the shape of a ring and are rotatably connected to the top of the inner side of the suspension frame (20); Several fixed blocks (22) are evenly distributed on the top of the corresponding rotating disk (21) and are fixedly connected to the rotating disk (21); Several threaded fixing rods (23) are threadedly connected to the corresponding fixing blocks (22) and are used to change the contact state with the suspension assembly by rotating themselves; The suspension assembly also includes: The upper fixing plate (40) has an internal cavity and a number of circular slots corresponding to the threaded fixing rod (23) on its top side wall. These slots are used to enter the circular slots when the corresponding threaded fixing rod (23) contacts the upper fixing plate (40), thereby improving the fixing effect of the threaded fixing rod (23) on the suspension assembly. Several vents (41) are provided, with no fewer than two, all located on the top of the upper fixed plate (40), connecting the internal cavity of the upper fixed plate (40) to the outside; The lower fixed plate (70) has an internal cavity and is located directly below the upper fixed plate (40); Several connecting rods (50) are provided, with no fewer than four, and each of them is fixedly connected at one end to the bottom of the upper fixed plate (40) and at the other end to the top of the lower fixed plate (70). The connecting rods (50) connect the upper fixed plate (40) and the lower fixed plate (70). Several inflatable rods (60) are provided, with no fewer than two rods, each having one end fixedly connected to the bottom of the upper fixed plate (40) and the other end fixedly connected to the top of the lower fixed plate (70). The inflatable rods (60) connect the upper fixed plate (40) and the lower fixed plate (70). The suspension assembly also includes: Several jet nozzles (51) are respectively disposed on the two side walls of the corresponding connecting rod (50) and symmetrically distributed along the central axis of the screw body (110) fixed in the middle of the suspension assembly. They are used to spray inert gas on the outside of the screw body (110) to form an inert gas wall surrounding the outside of the screw body (110). Several air inlets (61) are respectively provided on the side wall of the corresponding air rod (60), and the output ends are all facing the screw body (110) for spraying inert gas into the screw body (110) and filling the area between the screw body (110) and the inert gas wall; The extension lines of the gas outlet side of the plurality of jet nozzles (51) included in the suspension assembly intersect to form a closed shape; The suspension assembly includes a plurality of inflatable rods (60) located inside a closed pattern formed by a plurality of jet nozzles (51); The suspension assembly also includes: Two fan blades (80) are fixedly connected to the bottom of the upper fixed plate (40) and the bottom of the lower fixed plate (70) respectively, and are used to drive the inert gas outside the screw body (110) to move towards the screw body (110) when the suspension assembly rotates; A fixing wire (90) is provided at the bottom of the upper fixing plate (40) and is tied to the outside of the screw body (110) to fix the screw body (110) between the upper fixing plate (40) and the lower fixing plate (70).

2. The high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator according to claim 1, characterized in that: The power mechanism also includes: Several connecting discs (32) each have a cavity inside, which are fixedly connected to the power output end of the corresponding drive motor (31) and communicate with the air filling device (30). The connecting discs (32) extend into the aging furnace (10) and are located on the top of the corresponding hanging assembly. Several connecting protrusions (33) are opened at the bottom of the corresponding connecting plate (32) and communicate with the internal cavity of the connecting plate (32). They protrude outward from the bottom of the connecting plate (32) and are used to insert into the corresponding air port (41) to connect the inflation device (30) and the corresponding upper fixed plate (40) and transmit the torque of the drive motor (31).

3. The high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator according to claim 1, characterized in that: The suspension assembly further includes a collection mechanism disposed inside the lower fixed plate (70), the collection mechanism comprising: A plurality of collecting arc blocks (100) are arc-shaped structures with an "L"-shaped cross section, and the plurality of collecting arc blocks (100) form an "L"-shaped ring. Several elastic elements (101) are disposed between the collecting arc block (100) and the inner wall of the lower fixing plate (70), with one end fixedly connected to the collecting arc block (100) and the other end fixedly connected to the inner wall of the lower fixing plate (70), for providing the collecting arc block (100) with a clamping force on the screw body (110).

4. The high-temperature aging intensification heat treatment equipment for the screw of a nuclear power half-speed steam turbine generator according to claim 3, characterized in that: The bottom horizontal end of the collecting arc block (100) is clamped to the bottom of the screw body (110).

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