Steam turbine diaphragm and machining device therefor

Abstract

A steam turbine diaphragm and a machining device therefor, which relate to the technical field of steam turbine component design. The diaphragm comprises: diaphragm inner rings (1), diaphragm outer rings (2) and blades (3), wherein the diaphragm inner rings (1), the diaphragm outer rings (2) and the blades (3) are semicircular; the blades (3) are arranged between each diaphragm inner ring (1) and a diaphragm outer ring (2); and the two diaphragm inner rings (1) and the two diaphragm outer rings (2) are connected by means of connecting assemblies (4). The provision of the connecting assemblies (4) is beneficial to improving the effective connection between the diaphragm inner rings (1) and the diaphragm outer rings (2).

Description

A diaphragm of a steam turbine and a processing device thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine component design, in particular to a diaphragm of a steam turbine and a processing device thereof. BACKGROUND

[0002] The steam turbine is also called a steam turbine engine, which is a kind of rotary steam power device. High-temperature and high-pressure steam is injected onto the blades after passing through the fixed nozzle to become accelerated airflow, so as to rotate the main shaft with the blade row and simultaneously do work. The diaphragm of the steam turbine is a circular plate-shaped component assembled in the steam cylinder and separating the steam cylinder into several chambers with different pressures.

[0003] In the process of installing the diaphragm inner ring, the diaphragm outer ring and the blades of the traditional steam turbine, the welding process is usually used. At this time, in the process of installing the diaphragm inner ring and the diaphragm outer ring, the connecting point of the diaphragm inner ring and the diaphragm outer ring will be deformed due to welding, so that the installation precision of the guide vane is difficult to guarantee, which affects the assembly precision and forming quality of the diaphragm. Moreover, the existing steam turbine diaphragm processing device cannot clean and cool the surface of the diaphragm to be processed, so that the surface of the processed diaphragm has defects. Therefore, in view of the above status, it is urgent to develop a diaphragm of a steam turbine and a processing device thereof to overcome the deficiencies in the current actual application. SUMMARY

[0004] The present application provides a diaphragm of a steam turbine and a processing device thereof to solve at least one of the problems in the background art.

[0005] To solve the above technical problems, the present application discloses a diaphragm of a steam turbine, comprising: a diaphragm inner ring, a diaphragm outer ring and a blade, and the diaphragm inner ring, the diaphragm outer ring and the blade are semicircular, a blade is arranged between the diaphragm inner ring and the diaphragm outer ring, and two diaphragm inner rings and diaphragm outer rings are connected through a connecting assembly.

[0006] Preferably, the connecting assembly comprises: two groups of mounting holes, the two groups of diaphragm inner rings and diaphragm outer rings are overlapped, the mounting holes arranged between the two groups of diaphragm inner rings and diaphragm outer rings are matched, and the mounting holes are connected through bolts, and a plurality of sealing sleeves are connected to the outer ends of the bolts in the mounting holes.

[0007] Preferably, the inner side of the blade is welded with the diaphragm inner ring, and the outer side of the blade is welded with the diaphragm outer ring.

[0008] A diaphragm processing device of a steam turbine, comprising: a workbench, a processing box is fixedly installed at the top end of the workbench, and a processing mechanism is arranged in the processing box.

[0009] Preferably, the processing mechanism comprises: a hydraulic telescopic rod, a fixed end of the hydraulic telescopic rod is fixedly installed on an inner wall of a top end of a cavity one in the processing box, and an output end of the hydraulic telescopic rod is fixedly installed with a milling machine, a right bottom end of the cavity one is connected with a drain pipe, and an electromagnetic valve is fixedly installed on the drain pipe, and a cavity one arranged at a bottom end of the milling machine is provided with a clamping assembly;

[0010] The clamping assembly is symmetrically fixedly installed on inner walls of both ends of the cavity one, and the clamping assembly comprises: a clamping block, one end of the clamping block is connected with a to-be-processed partition plate, and the other end of the clamping block is connected with one end of a T-shaped sliding block, the other end of the T-shaped sliding block is slidably connected on an inner wall of a mounting frame, one end of a reset spring is fixedly installed on the inner wall of the mounting frame, and the other end of the reset spring is fixedly installed on the T-shaped sliding block.

[0011] Preferably, the processing box is further provided with a partition plate cleaning and cooling mechanism, and the partition plate cleaning and cooling mechanism comprises: a water storage cavity, the water storage cavity is arranged at a left top end of the processing box, a bottom end of the water storage cavity is communicated with a top end of a pressurizing box arranged in a cavity two through a connecting pipe one, an inverse flow valve one is fixedly installed in the connecting pipe one, a right side of the pressurizing box is connected with one end of a connecting pipe two, the other end of the connecting pipe two penetrates through the cavity one and is connected with a nozzle, an inverse flow valve two is fixedly installed in the connecting pipe two, a left end of the nozzle is fixedly installed on one end of a connecting rod one, the other end of the connecting rod one is movably connected on a fixed block, the fixed block is fixedly installed on a left inner wall of the cavity one, a top end of a supporting rod one is fixedly installed on the connecting rod one, one end of a supporting rod two is movably connected on a bottom end of the supporting rod one, the other end of the supporting rod two is fixedly installed on a connecting plate, the connecting plate is connected with a driving assembly, a piston is slidably connected in the pressurizing box, a sleeve is fixedly installed on a bottom end of the piston, and the sleeve is connected with the driving assembly.

[0012] Preferably, the driving assembly comprises: a driving motor, the driving motor is fixedly installed on an inner wall of a bottom end of the cavity two, an output end of the driving motor is fixedly installed with one end of a rotating shaft one, the other end of the rotating shaft one is fixedly installed with one end of a bevel gear one, a rear end of the bevel gear one is meshingly connected with a bevel gear two, a rear end of the bevel gear two is coaxially and rotatably connected with a gear, a right end of the gear is meshingly connected with a rack, the right end of the rack is fixedly connected with the connecting plate through a short rod, a bottom end of the rack is slidably connected on a connecting rod two, the bottom end of the connecting rod two is fixedly installed on the inner wall of the bottom end of the cavity two, a reset spring two is sleeved on the connecting rod two, and the reset spring two is fixedly installed on the rack and the inner wall of the cavity two at two ends, respectively, the rotating shaft one is connected with a threaded rod through a belt assembly, a top end of the threaded rod is threadedly connected with the sleeve, a bottom end of the threaded rod is rotatably connected with a limiting rod, and the limiting rod is fixedly installed on the inner wall of the cavity two. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0014] Fig. 1 is a schematic diagram of the installation of the diaphragm of the steam turbine according to the embodiment of the present application;

[0015] Fig. 2 is a schematic diagram of the cross section of the diaphragm connecting assembly according to the embodiment of the present application;

[0016] Fig. 3 is a schematic diagram of the diaphragm processing device according to the embodiment of the present application;

[0017] Fig. 4 is an enlarged schematic diagram of the structure of point A in Fig. 3 according to the embodiment of the present application.

[0018] Reference signs:

[0019] 1, inner ring of diaphragm; 2, outer ring of diaphragm; 3, blade; 4, connecting assembly; 5, mounting hole; 6, bolt; 7, sealing sleeve; 8, workbench; 9, processing box; 10, hydraulic telescopic rod; 11, cavity one; 12, milling machine; 13, clamping block; 14, diaphragm to be processed; 15, T-shaped sliding block; 16, mounting frame; 17, reset spring one; 18, drain pipe; 19, electromagnetic valve; 20, water storage cavity; 21, connecting pipe one; 22, cavity two; 23, reverse flow valve one; 24, pressurizing box; 25, connecting pipe two; 26, nozzle; 27, connecting rod one; 28, supporting rod one; 29, supporting rod two; 30, connecting plate; 31, piston; 32, sleeve; 33, driving motor; 34, fixed block; 35, reverse flow valve two; 36, rotating shaft one; 37, bevel gear one; 38, bevel gear two; 39, gear; 40, rack; 41, short rod; 42, connecting rod two; 43, reset spring two; 44, belt assembly; 45, threaded rod; 46, limiting rod. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application will be described clearly and completely below by combining the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0021] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and do not mean to particularly indicate the order or sequence, nor to limit the present application, which are merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0022] The present application provides the following embodiments

[0023] Embodiment 1

[0024] The embodiment of the present application provides a partition plate of a steam turbine, as shown in Figures 1-2, comprising: a partition plate inner ring 1, a partition plate outer ring 2 and a blade 3, and the partition plate inner ring 1, the partition plate outer ring 2 and the blade 3 are semicircular, the blade 3 is arranged between the partition plate inner ring 1 and the partition plate outer ring 2, and the two partition plate inner rings 1 and the partition plate outer rings 2 are connected through a connecting assembly 4.

[0025] Optionally, the connecting assembly 4 comprises: two groups of mounting holes 5, the two groups of partition plate inner rings 1 and the partition plate outer rings 2 are overlapped, and the mounting holes 5 arranged between the two groups of partition plate inner rings 1 and the partition plate outer rings 2 are matched, and the mounting holes 5 are connected through bolts 6, and a plurality of sealing sleeves 7 are clamped on the outer ends of the bolts 6 in the mounting holes 5.

[0026] Optionally, the inner side of the blade 3 is welded between the partition plate inner ring 1, and the outer side of the blade 3 is welded between the partition plate outer ring 2.

[0027] The working principle of the above technical scheme is: when the partition plate needs to be installed, first, the two partition plate inner rings 1 are butted against each other, then they are effectively fixed through the bolts 6, and the bolts 6 in the mounting holes 5 are sealed through the sealing sleeves 7, then the outer side of the connected partition plate inner ring 1 is welded with the inner end of the blade 3 connected through the connecting assembly 4, and the outer end of the blade 3 is welded with the partition plate outer ring 2 connected through the connecting assembly 4.

[0028] The beneficial effects of the above technical solutions are: the connecting assembly 4 is arranged, which is beneficial to improve the effective connection of the inner ring 1, the outer ring 2 and the blade 3 of the partition plate, thereby improving the strength of the partition plate, and the sealing sleeve 7 is arranged, which is beneficial to prevent the steam from damaging the bolt 6, thereby isolating the steam and preventing the bolt 6 from being unable to be disassembled due to rust on the surface of the bolt 6 when the partition plate is disassembled. Thus, the problem of the traditional steam turbine that the connecting point of the inner ring and the outer ring of the partition plate is deformed due to welding during the installation of the inner ring and the outer ring of the partition plate, so that the installation precision of the guide vane is difficult to guarantee, and the assembly precision and forming quality of the partition plate are affected is effectively improved.

[0029] Embodiment 2

[0030] On the basis of embodiment 1, the partition plate of the steam turbine is divided into an inner ring 1 and an outer ring 2 (the partition plate is used to fix the static blade (nozzle) and prevent inter-stage leakage, and it divides the steam turbine into several pressure sections, so that the steam passes through the static blade to convert potential energy into kinetic energy, and the airflow flows into the moving blade in a specified direction, and the partition plate can be directly fixed in the partition plate groove in the inner wall of the cylinder or fixed in the partition plate sleeve), and further comprises:

[0031] A pressure sensor one is arranged to detect the inlet pressure of the steam passing through the partition plate (the inner ring 1 or the outer ring 2) in the steam turbine;

[0032] A pressure sensor two is arranged to detect the outlet pressure of the steam passing through the partition plate (the inner ring 1 or the outer ring 2) in the steam turbine;

[0033] A controller and an alarm are arranged, and the controller is electrically connected with the pressure sensor one, the pressure sensor two and the alarm;

[0034] Optionally, the controller controls the alarm to work based on the pressure sensor one and the pressure sensor two, and the method comprises the following steps:

[0035] Step 1: according to formula (1), the detection values of the pressure sensor one and the pressure sensor two, the actual stress borne by the partition plate of the steam turbine is calculated , the controller compares the actual stress borne by the partition plate of the steam turbine with a preset stress range, and when the actual stress is higher than the preset stress range, the controller controls the alarm to alarm:

[0036] (1);

[0037] wherein is the stress calculation coefficient of the partition plate of the steam turbine (the value range is 0.22-0.43), is the detection value of the pressure sensor one, is the detection value of the pressure sensor two,​ the outer diameter of the turbine diaphragm, the thickness of the turbine diaphragm at the inner diameter, the minimum moment of inertia of the turbine diaphragm radial section, the minimum moment of inertia of the turbine diaphragm outer ring radial section;

[0038] Step 2: According to formula (2), calculate the actual deflection of the turbine diaphragm , the controller compares the actual deflection of the turbine diaphragm with the preset deflection range, when the actual deflection is higher than the preset deflection range, the controller controls the alarm to alarm:

[0039] (2);

[0040] wherein is the deflection calculation coefficient of the turbine diaphragm (the value range is 0.12-0.45), is the elastic modulus, is the inner diameter of the turbine diaphragm, is the thickness ratio between different parts of the turbine diaphragm (refers to the thickness difference between different parts or different layers of the diaphragm, generally speaking, the diaphragm thickness of high pressure part is relatively large to withstand higher pressure and temperature; The diaphragm of the low pressure part may be designed to be thinner to reduce weight and cost), is the height ratio between different parts of the turbine diaphragm (in the high pressure section, the pressure and temperature of the steam are high, so the height of the diaphragm may need to be appropriately increased to enhance its structural strength and sealing performance, compared with the low pressure section, the steam pressure and temperature are low, the height of the diaphragm can be relatively reduced to reduce the weight and reduce the cost).

[0041] Optionally, according to the following formula (3), calculate the actual steam seal leakage of the turbine diaphragm , the controller compares the actual steam seal leakage of the turbine diaphragm with the preset steam seal leakage range, when the actual detection of the steam seal leakage is higher than the preset steam seal leakage range, the controller controls the alarm to alarm:

[0042] (3);

[0043] wherein is the steam seal flow coefficient of the turbine diaphragm (the value range is 0.34-0.65), take 3.14, is the average diameter of the turbine steam seal teeth, Steam seal gap (referring to a certain space or distance reserved between adjacent components (such as diaphragm and rotor, cylinder and rotor, etc.) in steam turbines or other related equipment to prevent leakage of steam or other working media inside the equipment). The number of steam seal teeth of the steam turbine. The adiabatic index of the steam in the steam turbine. The logarithm to base e, This refers to the specific heat capacity of the steam before the steam seal section of the steam turbine.

[0044] The beneficial effects of the above technical solution are as follows: the controller calculates the actual stress borne by the turbine diaphragm based on the formula (1), the detection values ​​of pressure sensor one and pressure sensor two, and comprehensively considers the stress calculation coefficient of the turbine diaphragm, the outer diameter of the turbine diaphragm, the thickness of the turbine diaphragm at the inner diameter, the minimum moment of inertia of the radial section of the turbine diaphragm, and the minimum moment of inertia of the radial section of the outer ring of the turbine diaphragm, thereby making the calculation results more accurate and reliable;

[0045] Then, based on formula (2), the deflection calculation coefficient of the turbine diaphragm, the elastic modulus, the inner diameter of the turbine diaphragm, the thickness ratio between different parts of the turbine diaphragm, and the height ratio between different parts of the turbine diaphragm, the actual deflection borne by the turbine diaphragm is calculated, thus making the calculation results more accurate and reliable.

[0046] Finally, based on formula (3), the actual steam seal leakage of the turbine diaphragm is calculated. The steam seal flow coefficient of the turbine diaphragm (with a value range of 0.34-0.65), the average diameter of the turbine steam seal teeth, the steam seal gap, the number of turbine steam seal teeth, the adiabatic index of the turbine steam, and the specific heat capacity of the steam before the turbine steam seal section are taken into account, so that the calculation results are more accurate and reliable.

[0047] The controller controls the detection values ​​of pressure sensor one and pressure sensor two and controls the alarm to operate. The controller compares the actual stress borne by the turbine diaphragm with a preset stress range. When the actual stress exceeds the preset stress range, the controller activates the alarm. The controller also compares the actual deflection borne by the turbine diaphragm with a preset deflection range. When the actual deflection exceeds the preset deflection range, the controller activates the alarm. Furthermore, the controller compares the actual steam seal leakage of the turbine diaphragm with a preset steam seal leakage range. When the actual detected steam seal leakage exceeds the preset steam seal leakage range, the controller activates the alarm. When any of the above situations occur, the alarm sounds, thus reminding personnel to promptly inspect the diaphragm for damage and replace it in a timely manner, thereby meeting the user's requirements for this type of turbine diaphragm.

[0048] Example 3

[0049] On the basis of embodiments 1-2, a diaphragm machining device of a steam turbine, comprising: a workbench 8, a machining box 9 is fixedly installed at the top end of the workbench 8, and a machining mechanism is arranged in the machining box 9.

[0050] Optionally, the machining mechanism comprises: a hydraulic telescopic rod 10, the fixed end of the hydraulic telescopic rod 10 is fixedly installed on the inner wall at the top end of a cavity one 11 arranged in the machining box 9, and the output end of the hydraulic telescopic rod 10 is fixedly installed with a milling machine 12, the right bottom end of the cavity one 11 is connected with a drain pipe 18, and the drain pipe 18 is fixedly installed with an electromagnetic valve 19, and the bottom end of the milling machine 12 is arranged with a clamping assembly in the cavity one 11.

[0051] The clamping assembly is symmetrically fixedly installed on the inner walls at both ends of the cavity one 11, and the clamping assembly comprises: a clamping block 13, one end of the clamping block 13 is connected with a diaphragm to be machined 14, and the other end of the clamping block 13 is connected with one end of a T-shaped sliding block 15, and the other end of the T-shaped sliding block 15 is slidably connected on the inner wall of a mounting frame 16, one end of a reset spring one 17 is fixedly installed on the inner wall of the mounting frame 16, and the other end of the reset spring one 17 is fixedly installed on the T-shaped sliding block 15.

[0052] Optionally, the machining box 9 is further provided with a diaphragm cleaning and cooling mechanism, and the diaphragm cleaning and cooling mechanism comprises: a water storage cavity 20, the water storage cavity 20 is arranged at the top left end of the machining box 9, the bottom end of the water storage cavity 20 is communicated with the top end of a pressurizing box 24 arranged in a cavity two 22 through a connecting pipe one 21, an inverse flow valve one 23 is fixedly installed in the connecting pipe one 21, the right side of the pressurizing box 24 is connected with one end of a connecting pipe two 25, the other end of the connecting pipe two 25 penetrates the cavity one 11 and is connected with a nozzle 26, an inverse flow valve two 35 is fixedly installed in the connecting pipe two 25, the left end of the nozzle 26 is fixedly installed on one end of a connecting rod one 27, the other end of the connecting rod one 27 is movably connected on a fixed block 34, the fixed block 34 is fixedly installed on the left inner wall of the cavity one 11, a supporting rod one 28 is fixedly installed on the top end of the connecting rod one 27, one end of a supporting rod two 29 is movably connected on the bottom end of the supporting rod one 28, the other end of the supporting rod two 29 is fixedly installed on a connecting plate 30, and the connecting plate 30 is connected with a driving assembly, a piston 31 is slidably connected in the pressurizing box 24, a sleeve 32 is fixedly installed on the bottom end of the piston 31, and the sleeve 32 is connected with the driving assembly.

[0053] Optionally, the driving assembly comprises a driving motor 33 fixedly installed on the inner wall of the bottom end of the cavity two 22, and the output end of the driving motor 33 is fixedly installed with one end of a rotating shaft one 36, the other end of the rotating shaft one 36 is fixedly installed with one end of a bevel gear one 37, the rear end of the bevel gear one 37 is meshedly connected with a bevel gear two 38, the rear end of the bevel gear two 38 is coaxially and rotationally connected with a gear 39, the right end of the gear 39 is meshedly connected with a rack 40, and the right end of the rack 40 is fixedly connected with the connecting plate 30 through a short rod 41, the bottom end of the rack 40 is up-and-down slidingly connected with a connecting rod two 42, and the bottom end of the connecting rod two 42 is fixedly installed on the inner wall of the bottom end of the cavity two 22, a reset spring two 43 is sleeved on the connecting rod two 42, and the up-and-down two ends of the reset spring two 43 are fixedly installed on the rack 40 and the inner wall of the cavity two 22 respectively, the rotating shaft one 36 is connected with a threaded rod 45 through a belt assembly 44, the top end of the threaded rod 45 is screwedly connected with the sleeve 32, the bottom end of the threaded rod 45 is rotationally connected with a limiting rod 46, and the limiting rod 46 is fixedly installed on the inner wall of the cavity two 22.

[0054] The working principle of the above technical scheme is that when the baffle needs to be processed, first, the baffle to be processed 14 is clamped and fixed through the clamping assembly, then the milling machine 12 is moved to the required position by starting the hydraulic telescopic rod 10, and the baffle to be processed 14 is processed, then the driving motor 33 (which is a forward and reverse motor) is started, the driving motor 33 rotates to drive the bevel gear one 37 fixedly connected with the rotating shaft one 36 to rotate, the bevel gear one 37 rotates to drive the bevel gear two 38 meshed therewith to rotate, the bevel gear two 38 rotates to drive the gear 39 to rotate, the gear 39 rotates to drive the rack 40 meshed therewith to move up and down, so that the rack 40 moves up and down on the connecting rod two 42, the rack 40 moves to drive the connecting plate 30 connected with the short rod 41 to move up and down, so that the connecting plate 30 drives the connecting rod one 27 to change the angle of the connecting rod one 27, then the rotating shaft one 36 rotates to drive the threaded rod 45 connected with the belt to rotate, the threaded rod 45 rotates to drive the sleeve 32 screwedly connected therewith to drive the piston 31 to move up and down, so that the water in the pressurizing box 24 is delivered to the nozzle 26 through the connecting pipe two 25, so as to clean and cool the baffle to be processed 14 at different positions, then the electromagnetic valve 19 is opened, so as to discharge the waste water through the drain pipe 18.

[0055] The beneficial effects of the above technical solutions are: the clamping assembly is arranged, which is beneficial to effectively process the partition plates of different sizes and effectively fix the partition plates; the hydraulic telescopic rod 10 is arranged, which is beneficial to effectively adjust the up-down position of the milling machine 12; the drain pipe 18 and the electromagnetic valve 19 are arranged, which are beneficial to effectively drain the wastewater; the second return spring 43 is arranged, which is beneficial to realize the return processing of the rack 40; the second connecting rod 42 is arranged, which is beneficial to effectively position the rack 40; the first supporting rod 28 and the second supporting rod 29 are arranged, and the up-down movement of the second supporting rod 29 is beneficial to adjust the spraying angle of the nozzle 26, so as to flush the debris on the surface of the partition plate 14 to be processed and effectively cool the processing surface of the partition plate 14 to be processed; the piston 31 and the sleeve 32 are arranged, which are beneficial to effectively pressurize the water in the pressurizing box 24, so that the water is sprayed out through the nozzle 26; the backflow valve 1 23 and the backflow valve 2 35 are arranged, which are beneficial to prevent the liquid from flowing back; and the limiting rod 46 is arranged, which is beneficial to effectively support the threaded rod 45.

[0056] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A diaphragm for a steam turbine, characterized by Include: The inner ring of the partition (1), the outer ring of the partition (2) and the blade (3), and the inner ring of the partition (1), the outer ring of the partition (2) and the blade (3) are semicircular, the inner ring of the partition (1) and the outer ring of the partition (2) are provided with blade (3), two inner ring of the partition (1) and the outer ring of the partition (2) are connected through connecting assembly (4).

2. A diaphragm for a steam turbine as claimed in claim 1, characterised in that The connecting assembly (4) includes: two groups of mounting holes (5), two groups of inner ring of the partition (1) and the outer ring of the partition (2) are overlapped, and the mounting holes (5) between the two groups of inner ring of the partition (1) and the outer ring of the partition (2) are matched, and the mounting holes (5) are connected by bolts (6), and a plurality of sealing sleeves (7) are connected with the outer end of the bolt (6) in the mounting hole (5).

3. A diaphragm for a steam turbine as defined in claim 1, wherein The inner side of the blade (3) and the inner ring of the partition (1) are welded, and the outer side of the blade (3) and the outer ring of the partition (2) are welded.

4. A diaphragm machining device for a steam turbine for machining a diaphragm of a steam turbine according to any one of claims 1 to 3, characterized in that Include: Workbench (8), the workbench (8) top fixed mounting processing box (9), the processing box (9) is provided with processing mechanism inside.

5. A diaphragm machining apparatus for a steam turbine as set forth in claim 4, characterized by The processing mechanism includes: hydraulic telescopic rod (10), the fixed end of the hydraulic telescopic rod (10) is fixedly installed on the inner wall of the cavity one (11) top in the processing box (9), and the output end of the hydraulic telescopic rod (10) is fixedly installed with milling machine (12), the right bottom of the cavity one (11) is connected with drain pipe (18), and the electromagnetic valve (19) is fixedly installed on the drain pipe (18), the cavity one (11) is provided with clamping assembly in the bottom of the milling machine (12); The clamping assembly is symmetrically fixedly installed on the inner wall of the two ends of the cavity one (11), the clamping assembly includes: clamping block (13), one end of the clamping block (13) is connected with the workpiece partition (14), and the other end of the clamping block (13) is connected with one end of the T-shaped sliding block (15), and the other end of the T-shaped sliding block (15) is slidably connected to the inner wall of the mounting frame (16), one end of the reset spring one (17) is fixedly installed on the inner wall of the mounting frame (16), and the other end of the reset spring one (17) is fixedly installed on the T-shaped sliding block (15).

6. A diaphragm machining apparatus for a steam turbine as set forth in claim 4, characterized by The processing box (9) is also provided with a baffle cleaning and cooling mechanism, which comprises a water storage cavity (20) provided at the left top end of the processing box (9), a pressurizing box (24) provided in the cavity two (22) and communicated with the top end of the water storage cavity (20) through a connecting pipe one (21), a reverse flow valve one (23) fixedly installed in the connecting pipe one (21), a connecting pipe two (25) connected with one end of the right side of the pressurizing box (24), a nozzle (26) connected with the other end of the connecting pipe two (25) and penetrating through the cavity one (11), a reverse flow valve two (35) fixedly installed in the connecting pipe two (25), a connecting rod one (27) with one end of the left end of the nozzle (26) fixedly installed, the other end of the connecting rod one (27) movably connected with a fixed block (34), the fixed block (34) fixedly installed on the left side inner wall of the cavity one (11), a supporting rod one (28) fixedly installed on the top end of the connecting rod one (27), a supporting rod two (29) movably connected with one end of the bottom end of the supporting rod one (28), the other end of the supporting rod two (29) fixedly installed on a connecting plate (30), and the connecting plate (30) connected with a driving assembly, a piston (31) slidably connected in the pressurizing box (24), the bottom end of the piston (31) fixedly installed with a sleeve (32), and the bottom end of the sleeve (32) connected with the driving assembly.

7. A diaphragm machining apparatus for a steam turbine as defined in claim 6, wherein The driving assembly comprises a driving motor (33) fixedly installed on the bottom end inner wall of the cavity two (22), an output end of the driving motor (33) fixedly installed with one end of a rotating shaft one (36), the other end of the rotating shaft one (36) fixedly installed with one end of a bevel gear one (37), the rear end of the bevel gear one (37) meshingly connected with a bevel gear two (38), the rear end of the bevel gear two (38) coaxially rotatably connected with a gear (39), the right end of the gear (39) meshingly connected with a rack (40), the right end of the rack (40) fixedly connected with the connecting plate (30) through a short rod (41), the bottom end of the rack (40) slidably connected with a connecting rod two (42), the bottom end of the connecting rod two (42) fixedly installed on the bottom end inner wall of the cavity two (22), a reset spring two (43) sleeved on the connecting rod two (42), and the upper and lower ends of the reset spring two (43) fixedly installed on the rack (40) and the inner wall of the cavity two (22) respectively, the rotating shaft one (36) connected with a threaded rod (45) through a belt assembly (44), the top end of the threaded rod (45) threadedly connected with the sleeve (32), the bottom end of the threaded rod (45) rotatably connected with a limiting rod (46), and the limiting rod (46) fixedly installed on the inner wall of the cavity two (22).

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