Turbine partition plate

Abstract

The invention relates to the technical field of steam turbine partition plates, and provides a steam turbine partition plate which comprises two partition plate outer half rings and two partition plate inner half rings, a plurality of stationary blades are arranged between the partition plate outer half rings and the partition plate inner half rings, the two sides of each stationary blade are fixedly connected with an outer surrounding belt and an inner surrounding belt correspondingly, and the outer surrounding belts are fixedly connected with outer fixing blocks; the inner shroud ring is fixedly connected with an inner fixing block, the two partition plate outer semi-rings are provided with first semi-ring grooves, the two partition plate inner semi-rings are provided with second semi-ring grooves, the outer fixing block is embedded into the first semi-ring grooves, the outer fixing block is in sliding connection with the partition plate outer semi-rings, the inner fixing block is embedded into the second semi-ring grooves, and the inner fixing block is in sliding connection with the partition plate inner semi-rings. The adjacent outer surrounding belts or inner surrounding belts abut against each other. By means of the technical scheme, the problems that in the prior art, when any part of a stator blade or a partition plate is damaged, the whole partition plate needs to be replaced, waste of materials and resources is caused, and the maintenance cost and the use cost are remarkably increased are solved.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine diaphragms, and in particular to a steam turbine diaphragm. Background Art

[0002] A steam turbine is a power machine that converts steam energy into mechanical energy and is widely used in power generation, ship propulsion, industrial drive and other fields. Its basic principle is to use high-temperature and high-pressure steam to push the rotor blades inside the steam turbine to make it rotate at high speed, thereby driving the generator or other mechanical equipment to operate.

[0003] The turbine diaphragm is one of the important components inside the steam turbine. It is mainly used to support and fix the stationary blades, control the direction of steam flow, and ensure the effective conversion of steam energy. The diaphragm is usually installed in the casing of the steam turbine, opposite to the rotor blades. Through reasonable layout and design, efficient use of steam and energy conversion can be achieved. The design and manufacturing quality of the diaphragm directly affects the operating efficiency and reliability of the steam turbine, and is one of the key factors to ensure the performance and life of the steam turbine.

[0004] At present, most of the stationary blades and partitions on the market adopt an integrated or welded structure. This design is relatively simple in the manufacturing process, but there are many problems in practical application. For example, when any part of the stationary blade or partition is damaged, the entire partition often needs to be replaced. This not only leads to a waste of materials and resources, but also increases maintenance and use costs. Summary of the invention

[0005] The invention provides a steam turbine diaphragm which is easy to install and disassemble, has low maintenance cost and can effectively reduce material waste.

[0006] The technical solution of the present invention is as follows:

[0007] A steam turbine diaphragm comprises two diaphragm outer half rings and two diaphragm inner half rings, wherein the two diaphragm outer half rings are connected to form a diaphragm outer ring, and the two diaphragm inner half rings are connected to form a diaphragm inner ring, wherein the diaphragm inner ring is located in the middle of the diaphragm outer ring, and the connection between the two diaphragm outer half rings and the connection between the two diaphragm inner half rings are both provided with a half-ring connection structure for fixing the connection between the two half rings, and a plurality of stationary blades are arranged between the diaphragm outer ring and the diaphragm inner ring, and the two sides of the stationary blades are respectively fixedly connected with an outer belt and an inner belt. The outer belt and the inner belt are respectively abutted against the outer half ring and the inner half ring of the partition, the outer belt is fixedly connected with an outer fixing block on the side away from the static blade, and the inner belt is fixedly connected with an inner fixing block on the side away from the static blade. The outer fixing block is embedded in the outer half ring of the partition and is slidably connected with the outer half ring of the partition, and the inner fixing block is embedded in the inner half ring of the partition and is slidably connected with the inner half ring of the fixed plate. Several static blades are arranged in a circle along the outer ring or the inner ring of the partition, and adjacent outer belts or inner belts are abutted against each other.

[0008] Furthermore, the two outer half rings of the partitions are each provided with a first half ring groove having a cross section identical to that of the outer fixing block on one side facing the inner half ring of the partition, the two first half ring grooves are abutted against each other to form a first ring groove, the two inner half rings of the partitions are each provided with a second half ring groove having a cross section identical to that of the inner fixing block on one side facing the outer half ring of the partition, the two second half ring grooves are abutted against each other to form a second ring groove, the outer fixing block is embedded in the first half ring groove, the outer fixing block is slidably connected to the first half ring groove, the inner fixing block is embedded in the second half ring groove, and the inner fixing block is slidably connected to the second half ring groove.

[0009] Furthermore, the cross-sections of the outer fixing block and the inner fixing block are both anchor-shaped structures, and the outer fixing block and the inner fixing block each include two anchor claws, and the anchor claws are fixedly connected to a cylindrical bar.

[0010] Furthermore, two ends of the outer and inner bands abutting against the adjacent outer and inner bands are provided with blade connection blocks and blade connection grooves, respectively, and the blade connection blocks are embedded in the adjacent blade connection grooves.

[0011] Furthermore, the semi-ring connection structure includes two first connection blocks, two second connection blocks, two first connection grooves, and two second connection grooves. The two first connection blocks are respectively located at the two ends of one of the two outer semi-rings of the partition plates, and the two first connection grooves are respectively located at the two ends of the other outer semi-ring of the partition plates. The first connection block is embedded in the first connection groove, and the two second connection blocks are respectively located at the two ends of one of the two inner semi-rings of the partition plates. The two second connection grooves are respectively located at the two ends of the other inner semi-ring of the partition plates. The second connection block is embedded in the second connection groove, and the cross-sections of the first connection block, the second connection block, the first connection groove, and the second connection groove are all in a "T" shaped structure.

[0012] Furthermore, one side of the outer ring of the partition is provided with two fixed outer half rings for fixing the connection between the two partition outer half rings, and one side of the inner ring of the partition is provided with two fixed inner half rings for fixing the connection between the two partition inner half rings, the two fixed outer half rings are abutted against each other to form a fixed outer ring, and the two fixed inner half rings are abutted against each other to form a fixed inner ring, a first rotation fixing structure is provided between the fixed outer half ring and the outer half ring of the partition, and a second rotation fixing structure is provided between the fixed inner half ring and the inner half ring of the partition, the fixed outer half ring is detachably connected to the outer half ring of the partition, the fixed outer half ring is abutted against the outer band, the fixed inner half ring is detachably connected to the inner half ring of the partition, and the fixed inner half ring is abutted against the inner band.

[0013] Further, the first rotating fixed structure includes a plurality of first fixing bars and a plurality of first fixing grooves, the first fixing bar being fixed to a side of the outer half ring of the partition plate facing the fixed outer half ring, a first extension bar extending outward from one end of the first fixing bar, the length of the first extension bar being less than or equal to half of the length of the first fixing bar, the first fixing groove being located on a side of the fixed outer half ring facing the outer half ring of the partition plate, the length of the first fixing groove being greater than or equal to the sum of the lengths of the first fixing bar and the first extension bar, a first extension groove being provided on a side of the fixed outer half ring facing away from the outer half ring of the partition plate, one end of the first extension groove being connected to the first fixing groove, the length of the first extension groove being greater than or equal to the length of the first extension bar, the first fixing bar being embedded in the first fixing groove, the first extension bar being embedded in the first extension groove, the first extension bar being in contact with the fixed outer half ring, and a first compartment being provided between the first extension bar and the outer half ring of the partition plate;

[0014] The second rotating fixed structure includes a plurality of second fixed bars and a plurality of second fixed grooves, the second fixed bar being fixed to a side of the partition inner half ring facing the fixed inner half ring, a second extension bar extending outward from one end of the second fixed bar, the length of the second extension bar being less than or equal to half of the length of the second fixed bar, the second fixed groove being located on a side of the fixed inner half ring facing the partition inner half ring, the length of the second fixed groove being greater than or equal to the sum of the lengths of the second fixed bar and the second extension bar, a second extension groove being provided on a side of the fixed inner half ring facing away from the partition inner half ring, both ends of the second extension groove being connected to the second fixed grooves, the length of the second extension groove being greater than or equal to the length of the second extension bar, the second fixed bar being embedded in the second fixed groove, the second extension bar being embedded in the second extension groove, the second extension bar being in contact with the fixed inner half ring, and a second gap being provided between the second extension bar and the partition inner half ring.

[0015] Furthermore, the first extension strip and the second extension strip are both provided with a first fixing hole, the fixed outer half ring and the fixed inner half ring are both provided with a second fixing hole, the second fixing hole is located in the first extension groove or the second extension groove, the first fixing hole and the second fixing hole are connected, and fixing rods are embedded in the first fixing hole and the second fixing hole.

[0016] Furthermore, one end of the fixing rod facing the outer half ring or the inner half ring of the partition is fixedly connected with a limit pad for preventing the fixing rod from falling out of the first fixing hole and the second fixing hole, and the end of the first fixing hole facing away from the outer half ring or the inner half ring of the partition is provided with a threaded hole for facilitating the disassembly of the fixing rod.

[0017] The working principle and beneficial effects of the present invention are:

[0018] The present invention divides the static blade into several separate static blades by separately arranging the static blade and the outer ring and inner ring of the partition, and arranges an outer fixing block on the outer peripheral band of each static blade, and an inner fixing block on the inner peripheral band, arranges a first annular groove on the outer ring of the partition, and arranges a second annular groove on the inner ring of the partition, so that the outer fixing block and the inner fixing block are respectively embedded in the first half annular groove and the second half annular groove to form a sliding connection, and several static blades are abutted against each other to form a static blade as a whole. On the basis of achieving the same effect as traditional static blades, damaged static blades can be replaced individually without replacing the entire partition, thereby significantly reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is an exploded view of the present invention;

[0022] Figure 3 It is a back view of the present invention;

[0023] Figure 4 It is a front view of the present invention;

[0024] Figure 5 for Figure 4 Sectional view at AA;

[0025] Figure 6 It is a schematic diagram of the two outer half rings of the partition and the two inner half rings of the partition in the present invention after being separated;

[0026] Figure 7 It is a schematic diagram of the structure of the stationary blade in the present invention;

[0027] Figure 8 It is a back view of the fixed outer half ring and the fixed inner half ring in the present invention.

[0028] In the figure: 1. outer half ring of the partition; 2. inner half ring of the partition; 3. fixed outer half ring; 4. fixed inner half ring; 5. stationary blade; 6. fixing rod; 11. first fixing strip; 12. first fixing hole; 13. first connecting block; 14. first connecting groove; 15. first semi-ring groove; 21. second fixing strip; 22. second connecting block; 23. second connecting groove; 24. second semi-ring groove; 31. first fixing groove; 34. second fixing hole; 41. second fixing groove; 51. outer band; 52. inner band; 53. outer fixing block; 54. inner fixing block; 55. blade connecting block; 56. blade connecting groove; 57. cylindrical strip; 61. limiting pad; 62. threaded hole; 111. first extension strip; 211. second extension strip; 311. first extension groove; 411. second extension groove. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, this embodiment proposes a steam turbine diaphragm, including two diaphragm outer half rings 1 and two diaphragm inner half rings 2. The two diaphragm outer half rings 1 are connected to each other to form a diaphragm outer ring, and the two diaphragm inner half rings 2 are connected to each other to form a diaphragm inner ring. The diaphragm inner ring is located in the middle of the diaphragm outer ring. The connection between the two diaphragm outer half rings 1 and the connection between the two diaphragm inner half rings 2 are both provided with a half-ring connection structure for fixing the two half rings. A plurality of stationary blades 5 are arranged between the diaphragm outer ring and the diaphragm inner ring. An outer band 51 and an inner band 52 are fixedly connected on both sides of the stationary blade 5, respectively. The outer band 51 and the inner band 52 are respectively in contact with the diaphragm outer half ring 1 and the diaphragm inner half ring 2. The outer band 51 is fixedly connected to the side away from the stationary blade 5 with an outer fixing block 53, and the inner band 52 is fixedly connected to the side away from the stationary blade 5 with an inner fixing block 53. An inner fixing block 54 is fixedly connected to one side, and a first semi-ring groove 15 with the same cross-section as that of the outer fixing block 53 is arranged on the side of the two partition outer semi-rings 1 facing the partition inner semi-ring 2, and the two first semi-ring grooves 15 abut against each other to form a first ring groove, and a second semi-ring groove 24 with the same cross-section as that of the inner fixing block 54 is arranged on the side of the two partition inner semi-rings 2 facing the partition outer semi-ring 1, and the two second semi-ring grooves 24 abut against each other to form a second ring groove, the outer fixing block 53 is embedded in the first semi-ring groove 15, and the outer fixing block 53 is slidably connected to the partition outer semi-ring 1, and the inner fixing block 54 is embedded in the second semi-ring groove 24, and the inner fixing block 54 is slidably connected to the partition inner semi-ring 2, and a plurality of stationary blades 5 are arranged in a circle along the partition outer ring, and adjacent outer peripheral bands 51 or inner peripheral bands 52 abut against each other.

[0031] The outer half ring 1 of the partition and the inner half ring 2 of the partition form the outer ring and the inner ring of the partition, providing the basic framework of the overall structure. The split design is convenient for manufacturing, transportation and installation, and can better control the processing accuracy. The stationary blade 5 is used to control the flow direction of steam and improve the energy conversion efficiency of the steam turbine. Several separate stationary blades 5 form a stationary blade 5 as a whole, which is convenient for the subsequent replacement of damaged stationary blades 5. The outer band 51 and the inner band 52 are used to fix the stationary blade 5 to keep it in a predetermined position, ensure the stability of the steam flow path, provide fixation and support for the stationary blade 5, avoid displacement or vibration of the stationary blade 5, and improve the stability of the system. The outer fixing block 53 and the inner fixing block 54 are used to fix the stationary blade 5, fix the stationary blade 5 to the outer half ring 1 of the partition and the inner half ring 2 of the partition, so that the stationary blade 5 is fixed between the outer half ring 1 of the partition and the inner half ring 2 of the partition, stably exert its function, ensure the stability of the stationary blade 5 in a high temperature and high pressure environment, and prevent loosening or falling off. The first semi-annular groove 15 and the second semi-annular groove 24 are matched with the outer fixing block 53 and the inner fixing block 54 respectively, so that the outer fixing block 53 and the inner fixing block 54 can be embedded in the outer semi-ring 1 of the partition or the inner semi-ring 2 of the partition, and realize the sliding connection of the stationary blades 5, ensure the connection between adjacent stationary blades 5, and realize the installation and disassembly of the stationary blades 5 through the sliding connection, simplify the maintenance process, and reduce maintenance costs.

[0032] In this embodiment, the cross-sections of the outer fixing block 53 and the inner fixing block 54 are both anchor-type structures. The outer fixing block 53 and the inner fixing block 54 of the anchor-type structure can provide strong fixing and supporting effects, and the anchor-type structure is embedded in the corresponding semi-annular groove to ensure the stable installation of the stationary blade 5. The anchor-type structure has a larger contact area and a stronger fixing force, which effectively improves the stability and anti-vibration performance of the stationary blade 5 in a high temperature and high pressure environment, and reduces the risk of loosening and falling off.

[0033] In this embodiment, the outer fixing block 53 and the inner fixing block 54 each include two anchor claws, and the anchor claws are fixedly connected with a cylindrical bar 57. The cylindrical bar 57 provides an additional fixing point and supporting force for the outer fixing block 53 or the inner fixing block 54 through the anchor claws, further strengthens the connection strength between the stationary blade 5 and the partition, and improves the firmness and durability of the overall structure.

[0034] In this embodiment, the outer and inner bands 51 and 52 are respectively provided with blade connection blocks 55 and blade connection grooves 56 at both ends where the outer and inner bands 51 and 52 abut against the adjacent outer and inner bands 51 and 52, and the blade connection blocks 55 are embedded in the adjacent blade connection grooves 56. The blade connection blocks 55 and the blade connection grooves 56 are used for connecting and positioning the adjacent stationary blades 5. The blade connection blocks 55 are embedded in the adjacent blade connection grooves 56, so that the adjacent stationary blades 5 are closely matched, the arrangement accuracy and stability of the stationary blades 5 are improved, the misalignment and wear caused by vibration are reduced, and the connection strength between the stationary blades 5 is enhanced.

[0035] In this embodiment, the semi-ring connection structure includes two first connection blocks 13, two second connection blocks 22, two first connection grooves 14, and two second connection grooves 23. The two first connection blocks 13 are respectively located at the two ends of one of the two outer semi-rings 1 of the two partitions, and the two first connection grooves 14 are respectively located at the two ends of the other outer semi-ring 1 of the partition. The first connection block 13 is embedded in the first connection groove 14, and the two second connection blocks 22 are respectively located at the two ends of one of the two inner semi-rings 2 of the partition, and the two second connection grooves 23 are respectively located at the two ends of the other inner semi-ring 2 of the partition, and the second connection block 22 is embedded in the second connection groove 23. The cross-sections of the first connection block 13, the second connection block 22, the first connection groove 14, and the second connection groove 23 are all in a "T"-shaped structure. The first connection block 13 and the first connection groove 14 are used to connect the two ends of the outer semi-ring 1 of the partition to form a complete outer ring. The second connection block 22 and the second connection groove 23 are used to connect the two ends of the inner semi-ring 2 of the partition to form a complete inner ring. The "T"-shaped connecting blocks and connecting grooves ensure the firmness and stability of the connection, providing strong earthquake and stress resistance.

[0036] In this embodiment, two fixed outer half rings 3 for fixing the connection between the two outer half rings 1 of the partition are arranged on one side of the outer ring of the partition, and two fixed inner half rings 4 for fixing the connection between the two inner half rings 2 of the partition are arranged on one side of the inner ring of the partition, the two fixed outer half rings 3 are abutted against each other to form a fixed outer ring, the two fixed inner half rings 4 are abutted against each other to form a fixed inner ring, a first rotation fixing structure is arranged between the fixed outer half ring 3 and the outer half ring 1 of the partition, a second rotation fixing structure is arranged between the fixed inner half ring 4 and the inner half ring 2 of the partition, the fixed outer half ring 3 is detachably connected to the outer half ring 1 of the partition, the fixed outer half ring 3 is abutted against the outer peripheral band 51, the fixed inner half ring 4 is detachably connected to the inner half ring 2 of the partition, and the fixed inner half ring 4 is abutted against the inner peripheral band 52. The fixed outer half ring 3 is used to fix the connection between the two outer half rings 1 of the partition, and a fixed outer ring is formed by the two fixed outer half rings 3. The fixed inner half ring 4 is used to fix the connection between the two inner half rings 2 of the partition, and a fixed inner ring is formed by the two fixed inner half rings 4. The fixed outer half ring 3 and the fixed inner half ring 4 provide additional fixing and supporting functions, ensuring the integrity and stability of the partition outer ring and the partition inner ring, enhancing the strength of the partition outer ring and the partition inner ring, and through the abutment between the fixed outer half ring 3 and the fixed inner half ring 4 and the outer band 51 and the inner band 52, they can provide support for the stationary blades 5, ensure the stability of the stationary blades 5 during use, and facilitate installation and disassembly.

[0037] In this embodiment, the first rotating fixed structure includes a plurality of first fixing bars 11 and a plurality of first fixing grooves 31. The first fixing bar 11 is fixed to the side of the partition outer half ring 1 facing the fixed outer half ring 3. A first extension bar 111 is extended outward from one end of the first fixing bar 11. The length of the first extension bar 111 is less than or equal to half of the length of the first fixing bar 11. The first fixing groove 31 is located on the side of the fixed outer half ring 3 facing the partition outer half ring 1. The length of the first fixing groove 31 is greater than or equal to the sum of the lengths of the first fixing bar 11 and the first extension bar 111. A first extension groove 311 is provided on the side of the fixed outer half ring 3 facing away from the partition outer half ring 1. One end of the first extension groove 311 is connected to the first fixing groove 31. The length of the first extension groove 311 is greater than or equal to the length of the first extension bar 111. The first fixing bar 11 is embedded in the first fixing groove 31. The first extension bar 111 is embedded in the first extension groove 311. The first extension bar 111 is abutted against the fixed outer half ring 3. A first compartment is provided between the first extension bar 111 and the partition outer half ring 1. The first fixing bar 11 is fixed to one side of the outer half ring 1 of the partition, and cooperates with the first fixing groove 31 to provide a basic fixing function, ensuring the initial connection and stability of the outer half ring 1 of the partition and the fixed outer half ring 3. The first extension bar 111 extends outward from one end of the first fixing bar 11, and the outer half ring 3 is rotated to fix the first extension bar 111 so that the first extension bar 111 is embedded in the first extension groove 311, which further enhances the fixing effect, increases the embedding depth and contact area of ​​the fixing bar, and improves the stability and vibration resistance of the connection. The first fixing groove 31 is used to accommodate and fix the first fixing bar 11 and its extension bar, and provides a notch that cooperates with the first fixing bar 11 to ensure the stable embedding of the fixing bar and the extension bar and achieve reliable connection. The first extension groove 311 is used to accommodate the first extension bar 111, providing additional embedding space for the first extension bar 111, further enhancing the fixing effect and connection strength.

[0038] The second rotation fixing structure includes a plurality of second fixing bars 21 and a plurality of second fixing grooves 41. The second fixing bar 21 is fixed to a side of the partition inner half ring 2 facing the fixed inner half ring 4. A second extension bar 211 is extended outward from one end of the second fixing bar 21. The length of the second extension bar 211 is less than or equal to half of the length of the second fixing bar 21. The second fixing groove 41 is located on a side of the fixed inner half ring 4 facing the partition inner half ring 2. The length of the second fixing groove 41 is greater than or equal to the sum of the lengths of the second fixing bar 21 and the second extension bar 211. A second extension groove 411 is provided on a side of the fixed inner half ring 4 facing away from the partition inner half ring 2. Both ends of the second extension groove 411 are connected to the second fixing groove 41. The length of the second extension groove 411 is greater than or equal to the length of the second extension bar 211. The second fixing bar 21 is embedded in the second fixing groove 41. The second extension bar 211 is embedded in the second extension groove 411. The second extension bar 211 abuts against the fixed inner half ring 4. A second interval is provided between the second extension bar 211 and the partition inner half ring 2. The second fixing bar 21 is fixed to one side of the inner half ring 2 of the partition, and cooperates with the second fixing groove 41 to form a preliminary fixing structure. The second extension bar 211 extends outward from one end of the second fixing bar 21, and the outer half ring 3 is rotated and fixed so that the second extension bar 211 is embedded in the second extension groove 411, further enhancing the fixing effect. The second fixing groove 41 is used to accommodate and fix the second fixing bar 21 and its extension bar. The second extension groove 411 is used to accommodate the second extension bar 211.

[0039] In this embodiment, the first extension strip 111 and the second extension strip 211 are both provided with a first fixing hole 12, the fixed outer semi-ring 3 and the fixed inner semi-ring 4 are both provided with a second fixing hole 34, the second fixing hole 34 is located in the first extension groove 311 or the second extension groove 411, the first fixing hole 12 and the second fixing hole 34 are connected, and a fixing rod 6 is embedded in the first fixing hole 12 and the second fixing hole 34. The first fixing hole 12 and the second fixing hole 34 are connected to accommodate the fixing rod 6. The fixing rod 6 is used to provide a strong fixing effect, and by inserting the fixing rod 6 into the fixing hole, the connection between the extension strip and the fixed outer semi-ring 3 or the fixed inner semi-ring 4 is further stabilized to prevent the fixed outer semi-ring 3 and the fixed inner semi-ring 4 from rotating during use.

[0040] In this embodiment, one end of the fixing rod 6 facing the outer half ring 1 of the partition or the inner half ring 2 of the partition is fixedly connected with a limiting pad 61 for preventing the fixing rod 6 from falling out of the first fixing hole 12 and the second fixing hole 34, and one end of the first fixing hole 12 facing away from the outer half ring 1 of the partition or the inner half ring 2 of the partition is provided with a threaded hole 62 for facilitating the disassembly of the fixing rod 6. The limiting pad 61 provides additional safety protection to ensure the stability and reliability of the fixing rod 6. The threaded hole 62 facilitates the maintenance and replacement of the fixing rod 6, improves the convenience of installation and disassembly, and reduces maintenance time and cost. The provision of the threaded hole 62 allows the fixing rod 6 to be rotated into the fixing rod 6 using a threaded rod with the same aperture as the threaded hole 62, and then the fixing rod 6 is extended by the threaded rod, thereby facilitating the staff to pull out the fixing rod 6 and disassemble the fixing rod 6.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam turbine diaphragm, comprising two diaphragm outer half rings (1) and two diaphragm inner half rings (2), wherein the two diaphragm outer half rings (1) are connected to each other to form a diaphragm outer ring, and the two diaphragm inner half rings (2) are connected to each other to form a diaphragm inner ring, wherein the diaphragm inner ring is located in the middle of the diaphragm outer ring, and characterized in that: The connection between the two outer half rings (1) of the partition and the connection between the two inner half rings (2) of the partition are both provided with a half ring connection structure for fixing the two half rings together. A plurality of stationary blades (5) are provided between the outer ring of the partition and the inner ring of the partition. An outer band (51) and an inner band (52) are respectively fixedly connected on both sides of the stationary blade (5). The outer band (51) and the inner band (52) are respectively in contact with the outer half ring of the partition and the inner half ring of the partition. The outer band (51) is away from the stationary blade (5). The outer side of the partition is fixedly connected with an outer fixing block (53), and the side of the inner peripheral belt (52) facing away from the stationary blade (5) is fixedly connected with an inner fixing block (54), the outer fixing block (53) is embedded in the outer half ring (1) of the partition and is slidably connected to the outer half ring (1) of the partition, and the inner fixing block (54) is embedded in the inner half ring (2) of the partition and is slidably connected to the inner half ring of the fixed plate, and a plurality of the stationary blades (5) are arranged in a circle along the outer ring or the inner ring of the partition, and adjacent outer peripheral belts (51) or inner peripheral belts (52) abut against each other.

2. A steam turbine diaphragm according to claim 1, characterized in that: The two outer half rings (1) of the partitions are provided with a first half ring groove (15) having a cross section identical to that of the outer fixing block (53) on one side facing the inner half ring (2) of the partitions, and the two first half ring grooves (15) are mutually abutted to form a first ring groove, and the two inner half rings (2) of the partitions are provided with a second half ring groove (24) having a cross section identical to that of the inner fixing block (54) on one side facing the outer half ring (1) of the partitions, and the two second half ring grooves (24) are mutually abutted to form a second ring groove, and the outer fixing block (53) is embedded in the first half ring groove (15), and the outer fixing block (53) is slidably connected to the first half ring groove (15), and the inner fixing block (54) is embedded in the second half ring groove (24), and the inner fixing block (54) is slidably connected to the second half ring groove (24).

3. A steam turbine diaphragm according to claim 1 or 2, characterized in that: The cross-sections of the outer fixing block (53) and the inner fixing block (54) are both anchor-shaped structures. The outer fixing block (53) and the inner fixing block (54) both comprise two anchor claws, and the anchor claws are fixedly connected to a cylindrical bar (57).

4. A steam turbine diaphragm according to claim 1, characterized in that: The two ends of the outer band (51) and the inner band (52) where they abut against the adjacent outer band (51) or the inner band (52) are respectively provided with a blade connection block (55) and a blade connection groove (56), and the blade connection block (55) is embedded in the adjacent blade connection groove (56).

5. A steam turbine diaphragm according to claim 1, characterized in that: The semi-ring connection structure comprises two first connection blocks (13), two second connection blocks (22), two first connection grooves (14), and two second connection grooves (23); the two first connection blocks (13) are respectively located at the two ends of one of the two outer semi-rings (1) of the partition plate; the two first connection grooves (14) are respectively located at the two ends of the other outer semi-ring (1) of the partition plate; the first connection block (13) is embedded in the first connection groove (14); the two second connection blocks (22) are respectively located at the two ends of one of the two inner semi-rings (2) of the partition plate; the two second connection grooves (23) are respectively located at the two ends of the other inner semi-ring (2) of the partition plate; the second connection block (22) is embedded in the second connection groove (23); and the cross-sections of the first connection block (13), the second connection block (22), the first connection groove (14), and the second connection groove (23) are all in a "T"-shaped structure.

6. A steam turbine diaphragm according to claim 1, characterized in that: One side of the partition outer ring is provided with two fixed outer half rings (3) for fixing the connection between the two partition outer half rings (1); one side of the partition inner ring is provided with two fixed inner half rings (4) for fixing the connection between the two partition inner half rings (2); the two fixed outer half rings (3) are mutually abutted to form a fixed outer ring; the two fixed inner half rings (4) are mutually abutted to form a fixed inner ring; a first rotation fixing structure is provided between the fixed outer half ring (3) and the partition outer half ring (1); a second rotation fixing structure is provided between the fixed inner half ring (4) and the partition inner half ring (2); the fixed outer half ring (3) is detachably connected to the partition outer half ring (1); the fixed outer half ring (3) is abutted against the outer band (51); the fixed inner half ring (4) is detachably connected to the partition inner half ring (2); and the fixed inner half ring (4) is abutted against the inner band (52).

7. A steam turbine diaphragm according to claim 6, characterized in that: The first rotating fixed structure comprises a plurality of first fixing bars (11) and a plurality of first fixing grooves (31); the first fixing bar (11) is fixed to a side of the outer half ring (1) of the partition plate facing the fixed outer half ring (3); a first extension bar (111) is extended outward from one end of the first fixing bar (11); the length of the first extension bar (111) is less than or equal to half the length of the first fixing bar (11); the first fixing groove (31) is located on a side of the fixed outer half ring (3) facing the outer half ring (1) of the partition plate; the length of the first fixing groove (31) is greater than or equal to the length of the first fixing bar (11) and the first extension bar (111); 1), a first extension groove (311) is provided on a side of the fixed outer half ring (3) away from the partition outer half ring (1), one end of the first extension groove (311) is connected to the first fixed groove (31), the length of the first extension groove (311) is greater than or equal to the length of the first extension strip (111), the first fixed strip (11) is embedded in the first fixed groove (31), the first extension strip (111) is embedded in the first extension groove (311), the first extension strip (111) is in contact with the fixed outer half ring (3), and a first compartment is provided between the first extension strip (111) and the partition outer half ring (1); The second rotating fixed structure comprises a plurality of second fixing bars (21) and a plurality of second fixing grooves (41); the second fixing bars (21) are fixed to a side of the partition inner half ring (2) facing the fixed inner half ring (4); a second extension bar (211) is extended outward from one end of the second fixing bar (21); the length of the second extension bar (211) is less than or equal to half the length of the second fixing bar (21); the second fixing groove (41) is located on a side of the fixed inner half ring (4) facing the partition inner half ring (2); the length of the second fixing groove (41) is greater than or equal to the length of the second fixing bar (21) and the second extension bar (21). 1), a second extension groove (411) is provided on a side of the fixed inner half ring (4) away from the partition inner half ring (2), two ends of the second extension groove (411) are connected to the second fixed groove (41), the length of the second extension groove (411) is greater than or equal to the length of the second extension strip (211), the second fixed strip (21) is embedded in the second fixed groove (41), the second extension strip (211) is embedded in the second extension groove (411), the second extension strip (211) is in contact with the fixed inner half ring (4), and a second gap is provided between the second extension strip (211) and the partition inner half ring (2).

8. A steam turbine diaphragm according to claim 7, characterized in that: The first extension strip (111) and the second extension strip (211) are both provided with a first fixing hole (12), the fixed outer half ring (3) and the fixed inner half ring (4) are both provided with a second fixing hole (34), the second fixing hole (34) is located in the first extension groove (311) or the second extension groove (411), the first fixing hole (12) and the second fixing hole (34) are connected, and fixing rods (6) are embedded in the first fixing hole (12) and the second fixing hole (34).

9. A steam turbine diaphragm according to claim 8, characterized in that: One end of the fixing rod (6) facing the outer half ring (1) or the inner half ring (2) of the partition is fixedly connected to a limiting pad (61) for preventing the fixing rod (6) from falling out of the first fixing hole (12) and the second fixing hole (34); and one end of the first fixing hole (12) facing away from the outer half ring (1) or the inner half ring (2) of the partition is provided with a threaded hole (62) for facilitating the disassembly of the fixing rod (6).

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