Heat treatment device and process for casting inner cylinder of steam turbine

Abstract

The application discloses a heat treatment device and process for steam turbine inner cylinder casting and particularly relates to the technical field of steam turbine inner cylinder casting. The device comprises a base, the base is provided with two symmetrical bases, the top end of the base is fixedly installed with an electric guide rail, the driving end of the electric guide rail is fixedly installed with a rotating mechanism, the top of the rotating mechanism is slidably clamped with a support pipe, the end of the support pipe away from the rotating mechanism is fixedly installed with a constant temperature mechanism, and the two constant temperature mechanisms are fixedly installed with a connecting pipe. The application sets the constant temperature mechanism, drives multiple constant distance carriages to move synchronously towards or away from each other, drives multiple outer frames and flame heads to move synchronously towards or away from each other, flexibly adjusts the distance between multiple flame heads, so that the multiple flame heads are attached to the inner wall of the steam turbine inner cylinder, and the attachment to the inner wall with different diameters in the steam turbine inner cylinder is adapted, and the steam turbine inner cylinder is effectively heat treated.

Description

Technical Field

[0001] This invention relates to the field of turbine inner cylinder casting technology, specifically to heat treatment equipment and processes for turbine inner cylinder casting. Background Technology

[0002] A steam turbine is an external combustion rotary machine that converts the thermal energy of steam into mechanical work. Steam from the boiler enters the steam turbine and passes through a series of annular nozzles and moving blades, converting the thermal energy of the steam into the mechanical energy of the turbine rotor. The internal cylinder operates in a high-temperature, high-pressure environment, which is harsh and places extremely high demands on the performance of the castings.

[0003] The casting process of turbine inner cylinders mainly includes pouring, melting, cleaning, and heat treatment. However, the traditional heat treatment process for turbine inner cylinders often involves placing the inner cylinder in a heat treatment device for large-area high-temperature calcination heat treatment. This heat treatment process covers a large area, but there will be areas where the heat treatment is incomplete, and it is impossible to perform targeted heat treatment on specific areas. This results in incomplete heat treatment of the turbine inner cylinder, leading to unsatisfactory heat treatment results and affecting the casting quality of the turbine inner cylinder. To address these issues, we propose a heat treatment device and process for casting turbine inner cylinders. Summary of the Invention

[0004] The purpose of this invention is to provide a heat treatment apparatus and process for casting the inner cylinder of a steam turbine, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat treatment device for casting the inner cylinder of a steam turbine, comprising a base, wherein two symmetrically distributed components are provided on the base, an electric guide rail is fixedly installed at the top of each base, a rotating mechanism is fixedly installed at the drive end of each electric guide rail, a support tube is slidably mounted on the top of each rotating mechanism, a heat-fixing mechanism is fixedly installed at the end of each support tube away from the rotating mechanism, and a connecting pipe is fixedly installed between the two heat-fixing mechanisms.

[0006] As a preferred embodiment of the present invention, the heating mechanism includes a heating outer frame, which is coaxially fixedly installed with the corresponding support tube end. A through groove is provided in the middle of the heating outer frame, and a cavity is provided in the heating outer frame. Multiple fixed-distance slides are slidably mounted on the outer side of the heating outer frame in a circular array. The opposite ends of the multiple fixed-distance slides extend into the cavity. A drive ring is rotatably mounted in the cavity. A planar threaded protrusion is provided on the side of the drive ring near the fixed-distance slide. A planar threaded groove is provided on the side of the fixed-distance slide near the drive ring to cooperate with the planar threaded protrusion. The planar threaded protrusion is movably engaged in the planar threaded groove.

[0007] As a preferred embodiment of the present invention, an outer frame is vertically installed on the opposite ends of the plurality of fixed-distance carriages, and a flame head is fixedly clamped on the outer frame. A connector is fixedly installed at the end of each flame head, and a connecting hose is fixedly installed at the end of each connector.

[0008] As a preferred embodiment of the present invention, the middle part of the drive ring is fixedly provided with a drive retaining ring, the drive retaining ring is rotatably engaged with the fixed heating outer frame, the middle part of the drive retaining ring extends into the central through groove, and the middle part of the drive retaining ring is fixedly provided with a drive frame.

[0009] As a preferred embodiment of the present invention, the opposite sides of the heating outer frame of the two heating mechanisms are coaxially fixedly installed with the connecting pipe.

[0010] As a preferred embodiment of the present invention, a support slide is fixedly mounted in the connecting pipe, a drive shaft is slidably inserted in the middle of the support slide, and two symmetrically distributed drive protrusions are fixedly mounted at the end of the drive shaft. The support slide is located between the two drive protrusions. The opposite sides of the drive frames in the two heating mechanisms are provided with drive grooves that cooperate with the drive protrusions. The drive protrusions can be movably engaged in the corresponding drive grooves.

[0011] As a preferred embodiment of the present invention, the end of the drive shaft away from the drive protrusion movably passes through the corresponding drive frame and extends into the corresponding support tube. A translation frame is rotatably mounted on the end of the drive shaft away from the drive protrusion via a bearing. The translation frame is slidably engaged with the inner side of the support tube. A telescopic rod is fixedly mounted on the bottom of the translation frame. The telescopic rod is fixedly mounted on the inner side of the support tube. A first motor is fixedly mounted on the inner side of the support tube. A drive clip is coaxially fixedly mounted on the drive end of the first motor. The drive clip is slidably engaged with the drive shaft.

[0012] As a preferred embodiment of the present invention, the rotating mechanism includes an L-shaped frame, which is fixedly installed on the drive end of the corresponding electric guide rail. A rotary bearing is fixedly mounted on the top of the L-shaped frame, and a mounting ring frame is fixedly mounted on the middle of the rotary bearing. The end of the support tube is movably engaged with the middle of the mounting ring frame. A plurality of mounting protrusions arranged in a ring array are integrally formed on the inner side of the mounting ring frame. A mounting groove that cooperates with the mounting protrusions is opened on the outer side of the end of the support tube. The mounting protrusions are movably engaged in the mounting groove. A driven gear ring is fixedly sleeved on the outer side of the mounting ring frame. A drive gear is meshed with the bottom of the driven gear ring. The drive gear is rotatably mounted on the L-shaped frame.

[0013] As a preferred embodiment of the present invention, a second motor is fixedly installed on the outer side of the L-shaped frame, and the drive end of the second motor and the shaft end of the corresponding drive gear are fixedly installed.

[0014] The heat treatment process for casting the inner cylinder of a steam turbine includes the following steps:

[0015] Step 1: Pass the device with support pipe, heating mechanism and connecting pipe through the inner cylinder of the steam turbine, so that the heating mechanism is placed in the inner cylinder of the steam turbine, and move the mounting bracket into the mounting slot to make the movable connection between the support pipe and the mounting ring frame, so as to provide stable support for the support pipe and heating mechanism on both sides, and connect the end of the connecting hose to the output end of the flame body input pump mechanism.

[0016] Step 2: Control and activate the telescopic rod to drive the translation frame and drive shaft to move horizontally. When one drive protrusion is engaged in the corresponding drive groove, the other drive protrusion disengages from the corresponding drive groove. Then, control and activate the first motor to drive the drive clip to rotate the drive shaft, which in turn drives the corresponding drive protrusion to rotate the corresponding drive frame. However, the other drive frame does not rotate, which drives the corresponding drive retaining ring to rotate, thereby driving the corresponding drive ring to rotate. This drives the planar threaded protrusion to rotate. In conjunction with the planar threaded grooves on multiple fixed-distance slides, multiple fixed-distance slides are driven to move towards each other or away from each other synchronously. This drives multiple outer frames and flame heads to move towards each other or away from each other synchronously. The spacing of multiple flame heads can be flexibly adjusted so that the corresponding multiple flame heads fit against the inner wall of the turbine inner cylinder.

[0017] Subsequently, the telescopic rod is controlled and activated to drive the translation frame and drive the shaft to move horizontally. When one of the drive protrusions is engaged in the corresponding drive groove, the first drive protrusion disengages from the corresponding drive groove. The first motor is then activated, which drives the drive bar to rotate the drive shaft. This causes multiple outer frames and nozzles in another fixed heating mechanism to move synchronously towards each other or away from each other. The spacing between the multiple nozzles is flexibly adjusted so that the corresponding multiple nozzles fit against the inner wall of the turbine cylinder.

[0018] Step 3: Activate the jet body input pump mechanism. The jet body enters the corresponding jet head through the connecting hose and connector, and sprays the jet body at multiple points on the inner wall of the turbine cylinder, thereby effectively heat-treating the inner cylinder of the turbine.

[0019] Simultaneously, the second motor is controlled and activated to drive the drive gear to drive the driven gear ring to reciprocate, thereby driving the fixed heating mechanism of the support tubes on both sides to reciprocate stably. In conjunction with the synchronous reciprocating rotation of the two fixed heating mechanisms, the turbine inner cylinder is reciprocated to spray flame, increasing the flame heat treatment area and preventing incomplete heat treatment in the turbine inner cylinder, thus performing comprehensive flame heat treatment on the turbine inner cylinder.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By setting a fixed heat mechanism, multiple fixed-distance slides are driven to move synchronously towards each other or away from each other, which in turn drives multiple outer frames and nozzles to move synchronously towards each other or away from each other. This allows for flexible adjustment of the spacing between multiple nozzles so that they can fit against the inner wall of the turbine cylinder and adapt to the fit of different inner diameter inner walls in the turbine cylinder, thus effectively heat-treating the turbine cylinder.

[0022] 2. In conjunction with the rotating mechanism, the fixed heating mechanism of the support tubes on both sides is driven to rotate stably, and the turbine inner cylinder is reciprocated to spray flame, which increases the flame heat treatment area and prevents incomplete heat treatment in the turbine inner cylinder. The turbine inner cylinder is subjected to comprehensive flame heat treatment, which effectively improves the heat treatment effect of the turbine inner cylinder. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structural connections after the invention has been disassembled.

[0026] Figure 3 This is a schematic diagram of the structural connection of the heat-regulating mechanism in this invention.

[0027] Figure 4 This is another structural connection diagram of the heat-regulating mechanism in this invention.

[0028] Figure 5 This is a schematic diagram showing the connection of some structures in this invention.

[0029] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0030] Figure 7 This is a schematic diagram showing the structural connection between the support tube and the rotating mechanism in this invention.

[0031] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0032] In the diagram: 1. Base; 2. Electric guide rail; 3. Rotating mechanism; 4. Support tube; 5. Heating mechanism; 6. Connecting tube; 51. Heating outer frame; 501. Through groove; 502. Cavity; 52. Fixed-distance slide; 53. Drive ring; 54. Outer frame; 55. Flame head; 56. Connector; 561. Connecting hose; 57. Drive retaining ring; 58. Drive frame; 61. Support slide; 62. Drive shaft; 63. Drive protrusion; 631. Drive groove; 64. Translation frame; 641. Telescopic rod; 65. First motor; 66. Drive retaining bar; 31. L-shaped frame; 32. Rotary bearing; 33. Mounting ring frame; 34. Mounting protrusion; 341. Mounting groove; 35. Driven gear ring; 36. Drive gear; 37. Second motor. Detailed Implementation

[0033] 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.

[0034] Example: Figures 1-8 As shown, the present invention provides a heat treatment device for casting the inner cylinder of a steam turbine, including a base 1. The base 1 has two symmetrically distributed components. An electric guide rail 2 is fixedly installed on the top of each base 1. A rotating mechanism 3 is fixedly installed on the driving end of each electric guide rail 2. In use, the electric guide rail 2 is controlled and turned on to drive the corresponding rotating mechanism 3 to move horizontally. A support tube 4 is slidably mounted on the top of each rotating mechanism 3. A heat-fixing mechanism 5 is fixedly installed on the end of each support tube 4 away from the rotating mechanism 3. A connecting pipe 6 is fixedly installed between the two heat-fixing mechanisms 5 to achieve a stable connection between the two heat-fixing mechanisms 5.

[0035] The heating mechanism 5 includes a heating outer frame 51, which is coaxially fixedly installed with the corresponding support tube 4 end. The opposite sides of the heating outer frame 51 of the two heating mechanisms 5 are coaxially fixedly installed with the connecting tube 6. The support tube 4 is driven to reciprocate, thereby driving the two heating mechanisms 5 to reciprocate synchronously.

[0036] The outer frame 51 with a fixed heating element has a central through groove 501 in the middle and a cavity 502 in the middle. Multiple fixed-distance slides 52 arranged in a ring array are slidably mounted on the outer side of the outer frame 51. The opposite ends of the multiple fixed-distance slides 52 extend into the cavity 502. A drive ring 53 is rotatably mounted in the cavity 502. The drive ring 53 has a planar threaded protrusion on the side near the fixed-distance slides 52. The fixed-distance slides 52 have a planar threaded groove on the side near the drive ring 53 that cooperates with the planar threaded protrusion. The planar threaded protrusion is movably engaged in the planar threaded groove. In use, the drive ring 53 is controlled to rotate, which drives the planar threaded protrusion to rotate. By cooperating with the planar threaded grooves on the multiple fixed-distance slides 52, the multiple fixed-distance slides 52 are synchronously driven to move towards each other or away from each other.

[0037] Each of the multiple fixed-distance slides 52 has an outer frame 54 vertically mounted on its opposite ends. Each outer frame 54 is fixedly fitted with a flame head 55. By driving the multiple fixed-distance slides 52 to move synchronously towards or away from each other, the multiple outer frames 54 and flame heads 55 are also driven to move synchronously towards or away from each other, thereby flexibly adjusting the spacing of the multiple flame heads 55 so that they can fit against the inner wall of the turbine inner cylinder and adapt to the different inner diameters of the turbine inner cylinder. Each flame head 55 has a connector 56 fixedly mounted at its end, and each connector 56 has a connecting hose 561 fixedly mounted at its end. First, connect the end of the connecting hose 561 to the output end of the flame input pump mechanism, turn on the flame input pump mechanism, and the flame enters the corresponding flame head 55 through the connecting hose 561 and connector 56, spraying flames at multiple points on the inner wall of the turbine cylinder, thereby effectively heat-treating the turbine cylinder. With the synchronous reciprocating rotation of the two subsequent constant heat mechanisms 5, the flame is sprayed reciprocally on the turbine cylinder, increasing the flame heat treatment area and preventing incomplete heat treatment in the turbine cylinder. This comprehensive flame heat treatment of the turbine cylinder effectively improves the heat treatment effect of the turbine cylinder.

[0038] The drive ring 53 is fixedly fitted with a drive retaining ring 57 in the middle. The drive retaining ring 57 is rotatably engaged in the fixed heating outer frame 51. The middle part of the drive retaining ring 57 extends into the central through groove 501. The middle part of the drive retaining ring 57 is fixedly fitted with a drive frame 58. By driving the drive frame 58 to rotate, the corresponding drive retaining ring 57 is driven to rotate, thereby driving the corresponding drive ring 53 to rotate.

[0039] A support slide 61 is fixedly mounted in the connecting pipe 6. A drive shaft 62 is slidably inserted in the middle of the support slide 61. Two symmetrically distributed drive protrusions 63 are fixedly mounted at the end of the drive shaft 62. The support slide 61 is located between the two drive protrusions 63. The opposite sides of the drive frames 58 in the two heating mechanisms 5 are provided with drive grooves 631 that cooperate with the drive protrusions 63. The drive protrusions 63 can be movably engaged in the corresponding drive grooves 631. When one drive protrusion 63 is movably engaged in the corresponding drive groove 631, the other drive protrusion 63 disengages from the corresponding drive groove 631. The drive shaft 62 rotates, driving the corresponding drive protrusion 63 to drive the corresponding drive frame 58 to rotate, but the other drive frame 58 does not rotate.

[0040] The end of the drive shaft 62 away from the drive protrusion 63 movably passes through the corresponding drive frame 58 and extends into the corresponding support tube 4. A translation frame 64 is rotatably mounted on the end of the drive shaft 62 away from the drive protrusion 63 via a bearing. The translation frame 64 is slidably engaged with the inner side of the support tube 4. A telescopic rod 641 is fixedly mounted at the bottom of the translation frame 64. The telescopic rod 641 is fixedly mounted on the inner side of the support tube 4. In use, the telescopic rod 641 is controlled and activated to drive the translation frame 64 and the drive shaft 62 to move horizontally without affecting the rotation of the drive shaft 62. A first motor 65 is fixedly mounted on the inner side of the support tube 4. A drive retainer 66 is coaxially fixedly mounted on the drive end of the first motor 65. The drive retainer 66 is slidably engaged in the drive shaft 62. In use, the first motor 65 is controlled and activated to drive the drive retainer 66 to drive the drive shaft 62 to rotate without affecting the horizontal movement of the drive shaft 62.

[0041] The rotating mechanism 3 includes an L-shaped frame 31, which is fixedly installed on the drive end of the corresponding electric guide rail 2. A rotary bearing 32 is fixedly mounted on the top of the L-shaped frame 31, and a mounting ring frame 33 is fixedly mounted on the middle of the rotary bearing 32. The end of the support tube 4 is movably engaged with the middle of the mounting ring frame 33. The inner side of the mounting ring frame 33 has a plurality of mounting protrusions 34 arranged in a ring array. The outer side of the end of the support tube 4 has a mounting groove 341 that cooperates with the mounting protrusions 34. The mounting protrusions 34 are movably engaged in the mounting groove 341 for supporting the tube 4 and installing... The movable snap-fit ​​between the ring frames 33 supports the two side support tubes 4 and the heating mechanism 5. A driven gear ring 35 is fixedly sleeved on the outer side of the mounting ring frame 33. The bottom of the driven gear ring 35 is meshed with a drive gear 36. The drive gear 36 is rotatably mounted on the L-shaped frame 31. A second motor 37 is fixedly mounted on the outer side of the L-shaped frame 31. The drive end of the second motor 37 and the corresponding shaft end of the drive gear 36 are fixedly mounted. In use, the second motor 37 is controlled and turned on to drive the drive gear 36 to drive the driven gear ring 35 to rotate, thereby driving the two side support tubes 4 and the heating mechanism 5 to rotate stably.

[0042] The heat treatment process for casting the inner cylinder of a steam turbine includes the following steps:

[0043] Step 1: Pass the device with support pipe 4, heating mechanism 5, and connecting pipe 6 through the inner cylinder of the steam turbine, place the heating mechanism 5 in the inner cylinder of the steam turbine, and movably engage the mounting bracket 34 in the mounting bracket groove 341 to make the movable engagement between the support pipe 4 and the mounting ring frame 33, so as to provide stable support for the support pipe 4 and the heating mechanism 5 on both sides. Connect the end of the connecting hose 561 to the output end of the flame body input pump mechanism.

[0044] Step 2: Control and activate the telescopic rod 641 to drive the translation frame 64 and drive shaft 62 to move horizontally. When one drive protrusion 63 is engaged in the corresponding drive groove 631, the other drive protrusion 63 disengages from the corresponding drive groove 631. Then, control and activate the first motor 65 to drive the drive clip 66 to drive the drive shaft 62 to rotate, which in turn drives the corresponding drive protrusion 63 to drive the corresponding drive frame 58 to rotate. However, the other drive frame 58 does not rotate, which drives the corresponding drive ring 57 to rotate, thereby driving the corresponding drive ring 53 to rotate. This drives the planar threaded protrusion to rotate. In conjunction with the planar threaded grooves on multiple fixed-distance slides 52, the multiple fixed-distance slides 52 are driven to move towards each other or away from each other synchronously. This drives multiple outer frames 54 and flame heads 55 to move towards each other or away from each other synchronously. The spacing of the multiple flame heads 55 is flexibly adjusted so that the corresponding multiple flame heads 55 fit against the inner wall of the turbine inner cylinder.

[0045] Subsequently, the telescopic rod 641 is controlled and activated to drive the translation frame 64 and the drive shaft 62 to move horizontally. When another drive protrusion 63 is engaged in the corresponding drive groove 631, the first drive protrusion 63 disengages from the corresponding drive groove 631. The first motor 65 is then activated, which drives the drive clip 66 to rotate the drive shaft 62. This causes multiple outer frames 54 and flame heads 55 in another fixed heating mechanism 5 to move synchronously towards each other or away from each other. The spacing between the multiple flame heads 55 is flexibly adjusted so that the corresponding multiple flame heads 55 fit against the inner wall of the turbine cylinder.

[0046] Step 3: Activate the jet body input pump mechanism. The jet body enters the corresponding jet head 55 through the connecting hose 561 and connector 56, and sprays the jet body at multiple points on the inner wall of the turbine cylinder, thereby effectively heat-treating the inner cylinder of the turbine.

[0047] Simultaneously, the second motor 37 is controlled and activated to drive the drive gear 36 to drive the driven gear ring 35 to reciprocate, thereby driving the two side support tubes 4 and the fixed heating mechanism 5 to reciprocate stably. In conjunction with the synchronous reciprocating rotation of the two fixed heating mechanisms 5, the turbine inner cylinder is reciprocated and flame-sprayed, increasing the flame-spraying heat treatment area and preventing incomplete heat treatment in the turbine inner cylinder, thus performing comprehensive flame-spraying heat treatment on the turbine inner cylinder.

[0048] 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 heat treatment device for casting the inner cylinder of a steam turbine, comprising a base (1), characterized in that: The base (1) has two symmetrically distributed bases. Each base (1) has an electric guide rail (2) fixedly installed at its top end. Each electric guide rail (2) has a rotating mechanism (3) fixedly installed at its drive end. Each rotating mechanism (3) has a support tube (4) slidably mounted on its top end. Each support tube (4) has a heating mechanism (5) fixedly installed at its end away from the rotating mechanism (3). A connecting pipe (6) is fixedly installed between the two heating mechanisms (5). The heating mechanism (5) includes a heating outer frame (51), which is coaxially fixedly installed with the corresponding support tube (4) end. A through groove (501) is provided in the middle of the heating outer frame (51), and a cavity (502) is provided in the heating outer frame (51). Multiple fixed-distance slides (52) are arranged in a ring array on the outer side of the heating outer frame (51). The opposite ends of the multiple fixed-distance slides (52) extend into the cavity (502). A drive ring (53) is rotatably installed in the cavity (502). A planar threaded protrusion is provided on the side of the drive ring (53) near the fixed-distance slide (52). A planar threaded groove is provided on the side of the fixed-distance slide (52) near the drive ring (53) to cooperate with the planar threaded protrusion. The planar threaded protrusion is movably engaged in the planar threaded groove. The drive ring (53) is fixedly fitted with a drive retaining ring (57) in the middle. The drive retaining ring (57) is rotatably engaged in the heating outer frame (51). The middle part of the drive retaining ring (57) extends into the central through groove (501). The middle part of the drive retaining ring (57) is fixedly fitted with a drive frame (58). The opposite sides of the heating outer frames (51) of the two heating mechanisms (5) are coaxially fixedly installed with the connecting pipe (6). A support slide (61) is fixedly installed in the connecting pipe (6). A drive shaft (62) is slidably inserted in the middle of the support slide (61). Two symmetrically distributed drive protrusions (63) are fixedly installed at the end of the drive shaft (62). The support slide (61) is located between the two drive protrusions (63). The opposite sides of the drive frames (58) in the two heating mechanisms (5) are provided with drive grooves (631) that cooperate with the drive protrusions (63). The drive protrusions (63) can be movably engaged in the corresponding drive grooves (631).

2. The heat treatment apparatus for casting the inner cylinder of a steam turbine according to claim 1, characterized in that: Each of the multiple fixed-distance carriages (52) has an outer frame (54) vertically installed at its opposite ends. Each outer frame (54) has a fixed nozzle (55) fixedly mounted on it. Each nozzle (55) has a connector (56) fixedly mounted at its end. Each connector (56) has a connecting hose (561) fixedly mounted at its end.

3. The heat treatment apparatus for casting the inner cylinder of a steam turbine according to claim 2, characterized in that: The end of the drive shaft (62) away from the drive protrusion (63) moves through the corresponding drive frame (58) and extends into the corresponding support tube (4). The end of the drive shaft (62) away from the drive protrusion (63) is rotatably mounted with a translation frame (64) via a bearing. The translation frame (64) is slidably engaged with the inner side of the support tube (4). A telescopic rod (641) is fixedly mounted at the bottom of the translation frame (64). The telescopic rod (641) is fixedly mounted with the inner side of the support tube (4). A first motor (65) is fixedly mounted with the inner side of the support tube (4). A drive clip (66) is coaxially fixedly mounted on the drive end of the first motor (65). The drive clip (66) is slidably engaged in the drive shaft (62).

4. The heat treatment apparatus for casting the inner cylinder of a steam turbine according to claim 1, characterized in that: The rotating mechanism (3) includes an L-shaped frame (31), which is fixedly installed on the drive end of the corresponding electric guide rail (2). A rotary bearing (32) is fixedly mounted on the top of the L-shaped frame (31), and a mounting ring frame (33) is fixedly mounted in the middle of the rotary bearing (32). The end of the support tube (4) is movably engaged in the middle of the mounting ring frame (33). The inner side of the mounting ring frame (33) is integrally formed with a plurality of mounting protrusions (34) arranged in a ring array. The outer side of the end of the support tube (4) is provided with a mounting groove (341) that cooperates with the mounting protrusions (34). The mounting protrusions (34) are movably engaged in the mounting groove (341). A driven gear ring (35) is fixedly sleeved on the outer side of the mounting ring frame (33). A drive gear (36) is meshed with the bottom of the driven gear ring (35). The drive gear (36) is rotatably mounted on the L-shaped frame (31).

5. The heat treatment apparatus for casting the inner cylinder of a steam turbine according to claim 4, characterized in that: A second motor (37) is fixedly installed on the outer side of the L-shaped frame (31), and the drive end of the second motor (37) and the shaft end of the corresponding drive gear (36) are fixedly installed.

6. The heat treatment process for casting the inner cylinder of a steam turbine, applied to the heat treatment apparatus as described in claim 5, is characterized in that... Includes the following steps: Step 1: Pass the device with support pipe (4), heating mechanism (5), and connecting pipe (6) through the inner cylinder of the steam turbine, place the heating mechanism (5) in the inner cylinder of the steam turbine, and movably engage the mounting bracket (34) in the mounting bracket groove (341) to make the moving engagement between the support pipe (4) and the mounting ring frame (33) to provide stable support for the support pipe (4) and the heating mechanism (5) on both sides. Connect the end of the connecting hose (561) to the output end of the flame body input pump mechanism. Step 2: Control and activate the telescopic rod (641) to drive the translation frame (64) and drive shaft (62) to move horizontally, so that when one drive protrusion (63) is engaged in the corresponding drive groove (631), the other drive protrusion (63) disengages from the corresponding drive groove (631). Then, control and activate the first motor (65), which drives the drive retainer (66) to drive the drive shaft (62) to rotate, thereby driving the corresponding drive protrusion (63) to drive the corresponding drive frame (58) to rotate. However, the other drive protrusion... The frame (58) does not rotate, but drives the corresponding drive ring (57) to rotate, thereby driving the corresponding drive ring (53) to rotate, driving the planar threaded convex to rotate. It works in conjunction with the planar threaded grooves on multiple fixed-distance slides (52) to synchronously drive multiple fixed-distance slides (52) to move towards each other or away from each other, driving multiple outer frames (54) and flame heads (55) to move towards each other or away from each other synchronously. It flexibly adjusts the spacing of multiple flame heads (55) so that the corresponding multiple flame heads (55) fit against the inner wall of the turbine cylinder. Subsequently, the telescopic rod (641) is controlled and activated to drive the translation frame (64) and drive shaft (62) to move horizontally, so that when another drive protrusion (63) is engaged in the corresponding drive groove (631), the first drive protrusion (63) disengages from the corresponding drive groove (631), the first motor (65) is activated, and the drive clip (66) drives the drive shaft (62) to rotate, thereby driving multiple outer frames (54) and nozzles (55) in another fixed heating mechanism (5) to move synchronously towards each other or away from each other, flexibly adjusting the spacing of multiple nozzles (55) so that the corresponding multiple nozzles (55) fit against the inner wall of the turbine cylinder; Step 3: Activate the flame input pump mechanism. The flame enters the corresponding flame head (55) through the connecting hose (561) and connector (56) to spray flame at multiple points on the inner wall of the turbine cylinder, thereby effectively heat-treating the turbine cylinder. At the same time, control and activate the second motor (37) to drive the drive gear (36) to drive the driven gear ring (35) to rotate back and forth, thereby driving the two side support pipes (4) and the constant heat mechanism (5) to rotate stably back and forth. With the synchronous reciprocating rotation of the two constant heat mechanisms (5), the turbine cylinder is sprayed with flame in reciprocating rotation, increasing the flame heat treatment area and preventing incomplete heat treatment in the turbine cylinder, thus performing comprehensive flame heat treatment on the turbine cylinder.

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