Gas turbine compressor inspection and blade cleaning integrated structure

Abstract

The invention belongs to the technical field of gas turbine gas compressor inspection and blade cleaning design, and particularly relates to a gas turbine gas compressor inspection and blade cleaning integrated structure which integrates a gas compressor inspection and blade cleaning structure on a gas compressor stator casing, so that holes in the gas compressor stator casing can be reduced, and the efficiency of gas turbine gas compressor inspection is improved. Compared with the prior art, large circumferential space is prevented from being occupied, interference between structures is reduced, the disassembly and assembly difficulty is reduced, the online cleaning function on the compressor blades is designed, the compressor blades can be kept clean and the pollution rate of the compressor blades can be reduced through daily online cleaning, the performance attenuation rate of the compressor can be further reduced, and the service life of the compressor is prolonged. The gas turbine can continuously work for a longer time, the maintenance cost is reduced, in addition, the cleaning nozzle is designed, the large spraying range and angle are achieved, the better atomization effect can be achieved, the cleaning efficiency and the cleaning effect can be improved, and deep cleaning of compressor blades can be achieved.

Description

Technical Field

[0001] This application belongs to the technical field of gas turbine compressor inspection and blade cleaning design, specifically relating to an integrated structure for gas turbine compressor inspection and blade cleaning. Background Technology

[0002] Extensive testing is required during the development phase of a gas turbine. During testing, regular maintenance checks must be performed on various engine components, especially the rotor. To facilitate inspection, inspection holes are often made in the compressor stator casing, and corresponding plugging structures are installed.

[0003] Meanwhile, during operation, gas turbines inhale large amounts of dust, smoke, salt spray, oil, and other impurities, which adhere to the compressor blades, corroding them and affecting the compressor's aerodynamic performance. Therefore, it is necessary to clean the compressor blades regularly to keep them clean. For this purpose, cleaning holes are usually opened on the compressor stator casing, and cleaning nozzles are installed to clean the compressor blades.

[0004] Currently, inspection holes and cleaning holes are opened separately on the compressor stator casing. There are at least two openings on the compressor stator casing, which will occupy a large circumferential space. In addition, various sensors and testing devices need to be installed on the compressor stator casing, resulting in a complex pipeline layout. The superimposed hole-blocking structures and cleaning nozzles will exacerbate the interference between structures and increase the difficulty of disassembly and assembly.

[0005] Furthermore, current cleaning nozzles are offline nozzles, which can only be installed and used after the aircraft is stopped to clean the compressor blades offline. They cannot be used to clean the compressor blades online while the gas turbine is running. Moreover, the cleaning nozzles are usually single-hole nozzles with a small spray angle, poor atomization effect, low cleaning efficiency, and poor cleaning effect, making it difficult to achieve deep cleaning of compressor blades.

[0006] This application is made in view of the aforementioned technical deficiencies. Summary of the Invention

[0007] The purpose of this application is to provide an integrated structure for inspecting gas turbine compressors and cleaning their blades, in order to overcome or mitigate at least one of the known technical defects.

[0008] The technical solution of this application is:

[0009] An integrated structure for inspecting and cleaning the blades of a gas turbine compressor includes an online cleaning structure and a plugging structure;

[0010] The online cleaning structure includes a mounting base, an annular nozzle, cleaning fluid lines, and air inflation lines;

[0011] The mounting base has a cylindrical structure, with its lower end extending into the mounting hole opened on the compressor stator casing, and has an inward annular folded edge. The inward annular folded edge has multiple online cleaning holes and is flush with the inner side of the compressor stator casing; the upper end of the mounting base has an outward annular folded edge.

[0012] The annular nozzle is a hollow ring-shaped nozzle, which is set inside the mounting base and abuts against the inner annular folded edge of the mounting base. It has spray holes that are aligned with the online cleaning holes on the mounting base.

[0013] The inlet end of the cleaning fluid pipeline is connected to the cleaning fluid source, and the outlet end passes through the opening on the side wall of the mounting base, bends downward, and connects to the annular nozzle.

[0014] The inlet end of the inflation pipe is connected to the air source, and the outlet end passes through the opening on the side wall of the mounting base, bends downward, and connects to the annular nozzle.

[0015] The plugging structure includes a mounting cylinder, a cover plate, a plug, and a spring;

[0016] The mounting cylinder is stepped and is installed inside the mounting base. The small end abuts against the inward annular folded edge of the mounting base, and the stepped part presses against the annular nozzle. The large end has an outward annular folded edge, which is connected to the outward annular folded edge of the mounting base.

[0017] The cover plate is connected to the outward annular folded edge of the mounting cylinder, and has an irregularly shaped mounting hole, which can be an elliptical hole, a racetrack-shaped hole, or an oblong hole; the inner side of the cover plate has an annular support edge, which extends into the large end of the mounting cylinder and abuts against the stepped part of the mounting cylinder.

[0018] The plug is installed inside the annular support edge of the cover plate. Its lower end passes through the small end of the mounting cylinder and extends into the middle part of the inward annular folded edge of the mounting base, flush with the inner side of the compressor stator casing. The upper outer wall of the plug has fins.

[0019] The spring is installed inside the annular support edge of the cover plate, sleeved on the outer periphery of the plug, with both ends abutting between the stepped part of the mounting cylinder and the wing edge of the plug, pressing the wing edge of the plug tightly against the inner side of the cover plate.

[0020] The plug can rotate within the annular support edge of the cover plate, aligning the fin with the irregular mounting hole of the cover plate, thus allowing the plug to be removed through the irregular mounting hole of the cover plate.

[0021] According to at least one embodiment of this application, in the above-described integrated structure for inspecting and cleaning the gas turbine compressor blades, the outer wall of the mounting base has an annular mounting edge, which presses against an annular boss provided on the compressor stator casing.

[0022] The cross-section of the annular nozzle is flat and round;

[0023] The portion of the cleaning fluid pipeline inside the mounting bracket is designed as a spiral tube;

[0024] The portion of the inflation tubing inside the mounting base is designed as a spiral tube;

[0025] The annular nozzle is welded to the cleaning fluid pipeline and the air inflation pipeline into a single structure.

[0026] The annular nozzle is welded to the inward annular folded edge of the mounting base.

[0027] According to at least one embodiment of this application, in the above-mentioned integrated structure for inspecting and cleaning the gas turbine compressor and its blades, the wing edge angle of the plug is 90° laterally offset from the irregular mounting hole on the cover plate.

[0028] The end of the plug has a threaded hole for threaded connection with a long rod-type tool.

[0029] According to at least one embodiment of this application, the above-described integrated structure for inspecting gas turbine compressors and cleaning their blades also includes an offline cleaning structure.

[0030] The offline cleaning structure includes offline cleaning nozzles and offline cleaning pipelines;

[0031] The offline cleaning nozzle is set inside the annular support edge of the cover plate. Its lower end passes through the small end of the mounting cylinder and the middle part of the inner annular folded edge of the mounting base, and extends into the compressor stator casing. It has an offline cleaning nozzle opening at the rear, facing the compressor blades.

[0032] The upper end of the offline cleaning nozzle extends from the irregular mounting hole of the cover plate, and the end has an offline cleaning through hole, which connects to the offline cleaning nozzle at the lower end through the internal channel of the offline cleaning nozzle.

[0033] The outer wall of the offline cleaning nozzle has fins, and a spring is sleeved on the outer periphery of the offline cleaning nozzle. Both ends abut against the stepped part of the mounting cylinder and the fins of the offline cleaning nozzle, pressing the fins of the outer wall of the offline cleaning nozzle tightly against the inner side of the cover plate.

[0034] The outlet end of the offline cleaning pipeline is connected to the upper end of the offline cleaning nozzle, and the inlet end branches to form a cleaning fluid branch pipeline and an air filling branch pipeline, which are respectively connected to the cleaning fluid source and the air source;

[0035] The offline cleaning nozzle can rotate within the annular support edge of the cover plate, aligning its upper fin edge with the irregular mounting hole of the cover plate, thereby allowing the offline cleaning nozzle to be removed through the irregular mounting hole of the cover plate.

[0036] According to at least one embodiment of this application, in the above-described integrated structure for inspecting gas turbine compressors and cleaning their blades, the offline cleaning pipeline and the upper end of the offline cleaning nozzle are connected by a thread.

[0037] According to at least one embodiment of this application, in the above-mentioned integrated structure for gas turbine compressor inspection and blade cleaning, the offline cleaning structure includes an outer cylinder, a lower end, an arc-shaped pipe, a lower end plate, a lower bushing, a torsion spring, an upper end plate, an upper bushing, and an upper end.

[0038] The outer cylinder is elliptical and is set inside the annular support edge of the cover plate. It has an inward annular fold at the lower end and an annular opening at the upper end.

[0039] The lower end is elliptical, the upper end face has an arc-shaped groove and an annular protrusion. The middle part of the annular protrusion is connected to the middle part of the inner annular fold of the outer cylinder, and the outer side of the annular protrusion has an annular groove.

[0040] The lower end of the head passes through the small end of the mounting cylinder and the middle part of the inner annular folded edge of the mounting base, and extends into the compressor stator casing. Multiple offline cleaning nozzles are opened to the rear, facing the compressor blades.

[0041] The arc-shaped tube is set in the arc-shaped slot at the lower end and is connected to the annular protrusion in the middle of the lower end through the internal channel of the lower end. An offline cleaning nozzle aligned with the offline cleaning nozzle of the lower end is provided on it.

[0042] The lower end plate is elliptical in shape, fitted around the annular protrusion at the lower end, and locked in the annular groove of the annular protrusion, covering the arc-shaped slot at the lower end.

[0043] The lower bushing is set in the middle of the inward annular folded edge of the outer cylinder, and has an outward flange at the upper end, which presses against the inward annular folded edge of the outer cylinder;

[0044] The upper bushing is set in the opening of the upper end plate, and the lower end has an outward flange;

[0045] The upper end is set inside the outer cylinder, the lower end passes through the lower bushing and extends into the annular protrusion in the middle of the lower end, the upper end extends out from the upper bushing and the outer wall has fins; the upper end has a vertically penetrating cleaning channel inside, and the outer wall is fitted with the lower bushing and the upper bushing through a stepped structure.

[0046] The torsion spring is installed inside the outer cylinder and sleeved on the outer periphery of the upper end. Its two ends are connected to the outer cylinder and the upper end, so that the fin edge of the upper outer wall of the upper end is perpendicular to the outer cylinder.

[0047] The spring is sleeved on the outer periphery of the upper end, with both ends abutting against the stepped part of the mounting cylinder and the wing edge of the upper end, pressing the wing edge of the upper end tightly against the inner side of the cover plate.

[0048] The upper end can rotate inside the outer cylinder to align the fins with the irregular mounting holes on the cover plate, thereby allowing the offline cleaning nozzle to be removed through the irregular mounting holes on the cover plate.

[0049] According to at least one embodiment of this application, in the above-described integrated structure for inspecting and cleaning the gas turbine compressor and its blades, the lower end plate is composed of two semi-elliptical plates spliced ​​together.

[0050] The lower bushing is composed of two semi-circular bushings joined together.

[0051] The upper end plate is elliptical with a hole in the middle. Its outer edge is attached to the annular opening of the outer cylinder and is connected to the outer cylinder and the lower end plate by long bolts.

[0052] The upper bushing is composed of two semi-ring bushings joined together;

[0053] A sealing ring is provided between the lower end of the upper end and the middle part of the annular protrusion of the lower end;

[0054] The upper end and the upper bushing are connected by screws;

[0055] The two ends of the torsion spring are engaged in the slots opened on the outer cylinder and the upper end.

[0056] According to at least one embodiment of this application, in the above-described integrated structure for inspecting gas turbine compressors and cleaning their blades, the outer flange edge of the upper bushing has a stop protrusion, and the inner wall of the upper end plate has a stop groove, with the stop protrusion inserted into the stop groove.

[0057] According to at least one embodiment of this application, in the above-mentioned integrated structure for inspecting gas turbine compressors and cleaning their blades, the annular support edge of the cover plate has two axial grooves and a circumferential groove communicating with the axial grooves. The two axial grooves form openings at the edges of the irregular mounting holes of the cover plate. The wing edge of the upper end rotates into the circumferential groove through the two axial grooves. The wing edge of the upper end has two stop protrusions. When the wing edge of the upper end is pressed against the inner side of the cover plate, the two stop protrusions are stuck in the irregular mounting holes of the cover plate.

[0058] According to at least one embodiment of this application, in the above-mentioned integrated structure for gas turbine compressor inspection and blade cleaning, the plug includes a plug cylinder, a lower plug, a coil, a lower plug plate, a lower bushing, an inner torsion spring, an upper plug plate, an upper bushing, and an upper plug.

[0059] The plug is elliptical in shape and is set inside the annular support edge of the cover plate. It has an inward annular fold at the lower end and an annular opening at the upper end.

[0060] The lower plug is elliptical in shape, with an arc-shaped groove on the upper end face and an annular protrusion. The middle part of the annular protrusion is connected to the middle part of the inner annular fold of the plug cylinder, and the outer side of the annular protrusion has an annular groove.

[0061] The lower end of the plug passes through the small end of the mounting cylinder and is injected into the middle part of the inward annular fold of the mounting base, flush with the inner side of the compressor stator casing. Multiple online cleaning nozzles are opened at the end.

[0062] The coil is installed in the arc-shaped slot of the lower plug and is connected to the annular protrusion in the middle of the lower plug through the internal channel of the lower plug. The coil has an online cleaning nozzle aligned with the online cleaning nozzle of the lower plug.

[0063] The lower end plate is elliptical in shape, fitted around the annular protrusion of the lower end cap, and locked in the annular groove of the annular protrusion, covering the arc-shaped slot of the lower end cap; the lower end plate is made of two semi-elliptical plates spliced ​​together.

[0064] The lower bushing is located in the middle of the inward annular folded edge of the plug cylinder, and has an outward flange at the upper end, which presses against the inward annular folded edge of the plug cylinder; the lower bushing is composed of two semi-annular bushings spliced ​​together.

[0065] The upper blocking plate is elliptical in shape with a hole in the middle. Its outer edge is attached to the annular opening of the blocking cylinder and is connected to the blocking cylinder and the lower blocking plate by long bolts.

[0066] The upper bushing is set in the opening of the upper end plate, and the lower end has an outward flange, which is made up of two semi-ring bushings spliced ​​together;

[0067] The upper plug is installed inside the plug cylinder. Its lower end passes through the lower bushing and extends into the annular protrusion in the middle of the lower plug. A sealing ring can be installed in between. Its upper end extends out from the upper bushing and has fins on its outer wall. The upper plug has a vertically connected cleaning channel inside, and its outer wall is fitted with the lower and upper bushings through a stepped structure.

[0068] The upper plug is connected to the upper bushing using screws;

[0069] An internal torsion spring is installed inside the plug cylinder and sleeved on the outer periphery of the upper plug. Its two ends are connected to the plug cylinder and the upper plug, so that the fin edge of the upper outer wall of the upper plug remains perpendicular to the plug cylinder.

[0070] The spring is sleeved on the outer periphery of the upper plug, with both ends abutting between the stepped part of the mounting cylinder and the fin of the upper plug, pressing the fin of the upper plug tightly against the inner side of the cover plate;

[0071] The upper plug can rotate inside the plug cylinder, aligning the fin with the irregular mounting hole of the cover plate, and then the plug can be removed through the irregular mounting hole of the cover plate.

[0072] This application has at least the following beneficial technical effects:

[0073] This invention provides an integrated structure for inspecting and cleaning the compressor blades of a gas turbine. The structure is integrated into the compressor stator casing, reducing the number of openings in the casing, minimizing circumferential space occupation, reducing inter-structural interference, and simplifying disassembly and assembly. It also features an online cleaning function for the compressor blades, maintaining blade cleanliness through routine online cleaning, slowing down the rate of blade contamination, and consequently slowing down the rate of compressor performance degradation. This allows the gas turbine to operate continuously for longer periods, reducing maintenance costs. Furthermore, the design incorporates cleaning nozzles with a wide spray range and angle, resulting in better atomization and improved cleaning efficiency and effectiveness, enabling deep cleaning of the compressor blades.

[0074] The aforementioned integrated structure for inspecting gas turbine compressors and cleaning their blades adopts a modular and interchangeable design, with most parts being shared. It is easy to disassemble, install, and remove parts, effectively reducing the number of parts and providing good maintainability. Attached Figure Description

[0075] Figure 1 This is a schematic diagram of the integrated structure for inspecting and cleaning the gas turbine compressor and its blades provided in an embodiment of this application;

[0076] Figure 2 yes Figure 1 Top view;

[0077] Figure 3 This is a bottom schematic diagram of the mounting base provided in the embodiments of this application;

[0078] Figure 4 This is an installation diagram of the offline cleaning structure provided in Example 1 of this application;

[0079] Figure 5 This is an installation diagram of the offline cleaning structure provided in Example 2 of this application;

[0080] Figure 6 yes Figure 5 Top view;

[0081] Figure 7 This is a schematic diagram of the offline cleaning structure provided in Example 2 of this application;

[0082] Figure 8 yes Figure 7 Top view;

[0083] Figure 9 This is a schematic diagram of the arc-shaped tube provided in an embodiment of this application;

[0084] Figure 10 This is a partial schematic diagram of the offline cleaning structure provided in Example 2 of this application;

[0085] Figure 11 This is a schematic diagram of the improved cover plate in Example 2 of this application;

[0086] Figure 12 yes Figure 11 A diagram at one angle;

[0087] Figure 13 yes Figure 11 Another perspective illustration;

[0088] Figure 14 This is a schematic diagram of the plug with integrated online cleaning function provided in an embodiment of this application;

[0089] Figure 15 yes Figure 14 A partial schematic diagram;

[0090] in:

[0091] 1-Online cleaning structure; 2-Plugging structure; 3-Compressor stator casing; 4-Compressor blades; 5-Offline cleaning structure;

[0092] 11-Mounting base; 12-Annular nozzle; 13-Cleaning fluid line; 14-Inflation line;

[0093] 21-Mounting cylinder; 22-Cover plate; 23-Plug; 24-Spring;

[0094] 51-Offline cleaning nozzle; 52-Offline cleaning pipeline; 53-Outer cylinder; 54-Lower end; 55-Arc-shaped pipe; 56-Lower end plate; 57-Lower bushing; 58-Torsion spring; 59-Upper end plate; 510-Upper bushing; 511-Upper end;

[0095] 231-Plug; 232-Lower plug; 233-Coil; 234-Lower plug plate; 235-Lower bushing; 236-Inner torsion spring; 237-Upper plug plate; 238-Upper bushing; 239-Upper plug.

[0096] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. They are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation

[0097] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0098] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.

[0099] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0100] An integrated structure for inspecting and cleaning the blades of a gas turbine compressor, such as... Figures 1-2 As shown, it includes an online cleaning structure 1 and a plugging structure 2.

[0101] The online cleaning structure 1 includes a mounting base 11, an annular nozzle 12, a cleaning fluid pipeline 13, and an air inflation pipeline 14.

[0102] Mounting base 11 has a cylindrical structure, with its lower end extending into a mounting hole on the compressor stator casing 3, and has an inwardly oriented annular flange. This inwardly oriented annular flange has multiple online cleaning holes, such as... Figure 3 As shown, the inward annular folded edge is flush with the inner side of the compressor stator casing 3. The outer wall of the mounting base 11 has an annular mounting edge, which presses against the annular boss provided on the compressor stator casing 3. The upper end of the mounting base 11 has an outward annular folded edge.

[0103] The annular nozzle 12 is a hollow ring with a flattened round cross-section. It is installed inside the mounting base 11 and abuts against the inner annular folded edge of the mounting base 11. It has spray holes that are aligned with the online cleaning holes on the mounting base 11.

[0104] The inlet end of the cleaning fluid pipeline 13 is connected to the cleaning fluid source, which can be clean water or a cleaning fluid source containing detergent. The outlet end passes through the opening on the side wall of the mounting base 11, bends downward, and connects to the annular nozzle 12. The part of the cleaning fluid pipeline 13 inside the mounting base 11 can be designed as a spiral tube.

[0105] The inlet end of the inflation pipe 14 is connected to an air source, specifically a high-pressure air or nitrogen source. The outlet end passes through the opening in the side wall of the mounting base 11, bends downward, and connects to the annular nozzle 12. The part of the inflation pipe 14 inside the mounting base 11 can be designed as a spiral pipe.

[0106] To facilitate assembly, two downward-extending notches are made on the upper edge of the mounting base 11. During assembly, the annular nozzle 12 is first welded to the cleaning fluid pipeline 13 and the air inflation pipeline 14 as a single structure. Then, the cleaning fluid pipeline 13 and the air inflation pipeline 14 are installed from above the mounting base 11 along the two notches, so that the annular nozzle 12 is attached to the inner annular folded edge of the mounting base 11 and welded together. Finally, the two notches of the mounting base 11 are welded together.

[0107] Cleaning fluid and its airflow can be introduced into the annular nozzle 12 through the cleaning fluid line 13 and the air supply line 14, so that the cleaning fluid and airflow are mixed to form atomized droplets, which are sprayed into the compressor stator casing 3 from the nozzle hole of the annular nozzle 12 and the online cleaning hole of the mounting base 11. Under the action of the compressor airflow, the compressor blades 4 are cleaned online, and the deposits on the compressor blades 4 are cleaned in time, keeping the compressor blades 4 clean, thereby slowing down the rate of compressor performance degradation.

[0108] The plugging structure 2 includes an mounting cylinder 21, a cover plate 22, a plug 23, and a spring 24.

[0109] The mounting cylinder 21 is stepped and is installed inside the mounting base 11. The small end abuts against the inward annular folded edge of the mounting base 11, and the stepped part presses against the annular nozzle 12. The large end has an outward annular folded edge, which is connected to the outward annular folded edge of the mounting base 11.

[0110] The cover plate 22 is connected to the outward annular folded edge of the mounting cylinder 21, and has an irregularly shaped mounting hole, which can be an elliptical hole, a racetrack-shaped hole, or an oblong hole. The inner side of the cover plate 22 has an annular support edge, which extends into the large end of the mounting cylinder 21 and abuts against the stepped part of the mounting cylinder 21.

[0111] The plug 23 is installed inside the annular support edge of the cover plate 22. Its lower end passes through the small end of the mounting cylinder 21 and extends into the middle part of the inward annular folded edge of the mounting base 11, and is flush with the inner side of the compressor stator casing 3. The upper outer wall of the plug 23 has fins.

[0112] Spring 24 is installed inside the annular support edge of cover plate 22, sleeved on the outer periphery of plug 23, with both ends abutting between the stepped part of mounting cylinder 21 and the wing edge of plug 23, pressing the wing edge of plug 23 tightly against the inner side of cover plate 22.

[0113] The plug 23 can rotate within the annular support edge of the cover plate 22, aligning the fin with the irregular mounting hole of the cover plate 22. The plug 23 can then be removed through the irregular mounting hole of the cover plate 22. The internal structure of the compressor can be inspected using the channel formed by the irregular mounting hole of the cover plate 22, its annular support edge, the small end of the mounting cylinder 21, and the middle part of the inward annular folded edge of the mounting base 11.

[0114] When reinstalling the plug 23, adjust the fins of the plug 23 to align with the irregular mounting hole of the cover plate 22. Press the plug 23 down along the irregular mounting hole to compress the spring 24, so that the lower end of the plug 23 passes through the small end of the mounting cylinder 21 and extends into the middle part of the inward annular fold of the mounting base 11. Rotate the plug 23 to adjust the angle of the fins of the plug 23 to be offset to the side of the irregular mounting hole on the cover plate 22, specifically offset by 90°. Release the plug 23 so that the fins of the plug 23 are pressed against the inside of the cover plate 22 under the action of the spring 24.

[0115] To facilitate the assembly and disassembly of the plug 23, the upper end of the plug 23 can be designed to have a threaded hole for threaded connection with a long rod-type tool.

[0116] After removing the plug 23, the offline cleaning structure 5 can be installed in the channel formed by the irregular mounting hole of the cover plate 22 and its annular support edge, the small end of the mounting cylinder 21, and the middle part of the inward annular folded edge of the mounting base 11 to perform offline deep cleaning of the compressor blades 4.

[0117] In the first example, the offline cleaning structure 5 is designed to include an offline cleaning nozzle 51 and an offline cleaning pipeline 52, such as... Figure 4 As shown.

[0118] The offline cleaning nozzle 51 is set inside the annular support edge of the cover plate 22. Its lower end passes through the small end of the mounting cylinder 21 and the middle part of the inward annular folded edge of the mounting base 11, and extends into the compressor stator casing 3. It has an offline cleaning nozzle opening at the rear, facing the compressor blade 4.

[0119] The upper end of the offline cleaning nozzle 51 extends from the irregular mounting hole of the cover plate 22, and the end has an offline cleaning through hole, which connects to the offline cleaning nozzle at the lower end through the internal channel of the offline cleaning nozzle 51.

[0120] The outer wall of the offline cleaning nozzle 51 has fins. The spring 24 is sleeved on the outer periphery of the offline cleaning nozzle 51, with both ends abutting between the stepped part of the mounting cylinder 21 and the fins of the offline cleaning nozzle 51, pressing the fins of the outer wall of the offline cleaning nozzle 51 tightly against the inner side of the cover plate 22.

[0121] The outlet end of the offline cleaning pipeline 52 is connected to the upper end of the offline cleaning nozzle 51, which can be achieved through a threaded connection. The inlet end is branched to form a cleaning fluid branch pipeline and an air filling branch pipeline. The cleaning fluid branch pipeline and the air filling branch pipeline are respectively connected to the cleaning fluid source and the air source.

[0122] When cleaning the compressor blade 4 offline, the cleaning fluid and its airflow can be introduced into the internal channel of the offline cleaning nozzle 51 through the cleaning fluid branch line and the air supply branch line of the offline cleaning pipeline 52, so that the cleaning fluid and airflow are mixed to form atomized droplets, which are then sprayed backward through the offline cleaning nozzle 51 into the compressor stator casing 3 and sprayed onto the compressor blade 4 to perform offline deep cleaning of the compressor blade 4.

[0123] The offline cleaning nozzle 51 can rotate within the annular support edge of the cover plate 22, aligning its upper fin edge with the irregular mounting hole of the cover plate 22, thus allowing the offline cleaning nozzle 51 to be removed through the irregular mounting hole of the cover plate 22. Following this process, after completing the offline deep cleaning of the compressor blades 4, the offline cleaning nozzle 51 can be removed and the plug 23 replaced. The installation of the offline cleaning nozzle 51 is similar to the installation of the plug 23 described above, and will not be further elaborated here.

[0124] In the second example, the offline cleaning structure 5 is designed to include an outer cylinder 53, a lower end 54, an arc-shaped tube 55, a lower end plate 56, a lower bushing 57, a torsion spring 58, an upper end plate 59, an upper bushing 510, and an upper end 511, as shown. Figures 5-8 As shown.

[0125] The outer cylinder 53 is elliptical and is set inside the annular support edge of the cover plate 22. It has an inward annular fold at the lower end and an annular opening at the upper end.

[0126] The lower end 54 is elliptical, and the upper end face has an arc-shaped groove and an annular protrusion. The middle part of the annular protrusion is connected to the middle part of the inward annular fold of the outer cylinder 53, and the outer side of the annular protrusion has an annular groove.

[0127] The lower end of the head 54 passes through the small end of the mounting cylinder 21 and the middle part of the inward annular folded edge of the mounting base 11, and extends into the compressor stator casing 3. Multiple offline cleaning nozzles are opened to the rear, facing the compressor blades 4.

[0128] Arc-shaped tube 55 Figure 9 As shown, an arc-shaped slot is provided in the lower end 54, and an annular protrusion in the middle part of the lower end 54 is connected through the internal channel of the lower end 54. An offline cleaning nozzle is provided on the slot, which is aligned with the offline cleaning nozzle of the lower end 54.

[0129] The lower end plate 56 is elliptical in shape and is fitted around the annular protrusion of the lower end head 54, and is engaged in the annular groove of the annular protrusion, covering the arc-shaped slot of the lower end head 54. The lower end plate 56 can be designed to be spliced ​​together from two semi-elliptical plates.

[0130] The lower bushing 57 is located in the middle of the inward annular folded edge of the outer cylinder 53, and has an outward flange at its upper end, which presses against the inward annular folded edge of the outer cylinder 53. The lower bushing 57 can be designed to be spliced ​​together from two semi-annular bushings.

[0131] The upper end plate 59 is elliptical in shape with a hole in the middle. Its outer edge is attached to the annular opening of the outer cylinder 53 and is connected to the outer cylinder 53 and the lower end plate 56 by long bolts.

[0132] The upper bushing 510 is set in the opening of the upper end plate 59, and has an outward flange at the lower end. It can be designed to be spliced ​​together by two semi-ring bushings.

[0133] The upper end head 511 is installed inside the outer cylinder 53, and the lower end passes through the lower bushing 57 and extends into the annular protrusion in the middle of the lower end head 54, where a sealing ring can be installed. The upper end extends out from the upper bushing 510, and the outer wall has fins. The upper end head 511 has a vertically penetrating cleaning channel, and the outer wall is fitted with the lower bushing 57 and the upper bushing 510 through a stepped structure.

[0134] The upper end 511 and the upper bushing 510 can be connected by screws.

[0135] The torsion spring 58 is installed inside the outer cylinder 53 and sleeved on the outer periphery of the upper end 511. Both ends are connected to the outer cylinder 53 and the upper end 511. Specifically, it can be locked in the slots opened on the outer cylinder 53 and the upper end 511, so that the wing edge of the upper outer wall of the upper end 511 is perpendicular to the outer cylinder 53.

[0136] Spring 24 is sleeved on the outer periphery of the upper end 511, with both ends abutting between the stepped part of the mounting cylinder 21 and the wing edge of the upper end 511, pressing the wing edge of the upper end 511 tightly against the inner side of the cover plate 22.

[0137] When performing offline cleaning of the compressor blade 4, an offline cleaning pipeline 52 as shown in Example 1 can be connected to the upper end of the upper end 511. The cleaning liquid source and the gas source are connected through the cleaning liquid branch pipeline and the gas charging branch pipeline of the offline cleaning pipeline 52. The cleaning liquid and its airflow are introduced into the arc-shaped pipe 55 through the cleaning channel inside the upper end 511, so that the cleaning liquid and the airflow are mixed to form atomized droplets. The droplets are sprayed backward into the compressor stator casing 3 through the offline cleaning nozzles of the arc-shaped pipe 55 and the lower end 54, and sprayed onto the compressor blade 4 to perform offline deep cleaning of the compressor blade 4. Since the offline cleaning nozzles of the arc-shaped pipe 55 and the lower end 54 are distributed along the arc, they have a larger spray area and spray angle, which can achieve higher cleaning efficiency, better cleaning effect and deeper cleaning degree for the compressor blade 4.

[0138] The upper end 511 can rotate within the outer cylinder 53, aligning the fin edge with the irregular mounting hole of the cover plate 22, thereby allowing the offline cleaning nozzle 51 to be removed through the irregular mounting hole of the cover plate 22. Following this process, after completing the offline deep cleaning of the compressor blades 4, the offline cleaning nozzle 51 can be removed and the plug 23 replaced. The installation of the offline cleaning nozzle 51 is similar to the installation of the plug 23 described above, and will not be further elaborated here.

[0139] To prevent excessive twisting of the upper end 511, a stop protrusion can be designed on the outwardly flanged edge of the upper bushing 510, and a stop groove can be provided on the inner wall of the upper end plate 59. The stop protrusion is inserted into the stop groove, which is a 90° groove. Figure 10 As shown.

[0140] Based on the offline cleaning structure 5 disclosed in the above example, the shape and size of the mounting base 11, annular nozzle 12, cleaning fluid pipeline 13, air inflation pipeline 14 of the online cleaning structure 1, as well as the mounting cylinder 21, cover plate 22, plug 23, and spring 24 of the plugging structure 2 can be improved accordingly, and the wing edge of the plug 23 can be designed to have a similar shape to the wing edge of the upper end head 511.

[0141] Furthermore, the cover plate 22 is designed with two axial grooves on its annular support edge, and a circumferential groove communicating with the axial grooves. The two axial grooves form openings at the edges of the irregularly shaped mounting holes in the cover plate 22. Figures 11-13 As shown, the wing edge of the upper end head 511 rotates into the circumferential groove through two axial grooves. The upper end head 511 is designed with two stop protrusions on its wing edge. When the wing edge of the upper end head 511 is pressed against the inner side of the cover plate 22, the two stop protrusions are stuck in the irregular mounting hole of the cover plate 22. When it is necessary to remove the offline cleaning structure 5, the upper end head 511 can be pressed down first, so that the two stop protrusions on the wing edge of the upper end head 511 can be dislodged from the irregular mounting hole of the cover plate 22, and then exit along the circumferential groove and axial groove on the cover plate 22.

[0142] Furthermore, to enhance the online cleaning effect on the compressor blades 4, the online cleaning effect can be integrated into the plug 23. The plug 23 is designed to include a plug cylinder 231, a lower plug 232, a coil 233, a lower plug plate 234, a lower bushing 235, an inner torsion spring 236, an upper plug plate 237, an upper bushing 238, and an upper plug 239. Figure 14 As shown.

[0143] The plug 231 is elliptical in shape and is set inside the annular support edge of the cover plate 22. It has an inward annular fold at the lower end and an annular opening at the upper end.

[0144] The lower plug 232 is elliptical in shape, with an arc-shaped groove on the upper end face and an annular protrusion. The middle part of the annular protrusion is connected to the middle part of the inward annular fold of the plug cylinder 231, and the outer side of the annular protrusion has an annular groove.

[0145] The lower end of the lower plug 232 passes through the small end of the mounting cylinder 21 and is injected into the middle part of the inward annular folded edge of the mounting base 11, flush with the inner side of the compressor stator casing 3. Multiple online cleaning nozzles are opened at the end.

[0146] The coil 233 is installed in the arc-shaped slot of the lower plug 232, and is connected to the annular protrusion in the middle of the lower plug 232 through an internal channel. The coil has online cleaning nozzles aligned with the online cleaning nozzles of the lower plug 232. Figure 15 As shown.

[0147] The lower end plate 234 is elliptical in shape and is fitted around the annular protrusion of the lower end cap 232, and is engaged in the annular groove of the annular protrusion, covering the arc-shaped slot of the lower end cap 232. The lower end plate 234 can be designed to be spliced ​​together from two semi-elliptical plates.

[0148] The lower bushing 235 is located in the middle of the inward annular folded edge of the plug 231, and has an outward flange at its upper end, which presses against the inward annular folded edge of the plug 231. The lower bushing 235 can be designed to be spliced ​​together from two semi-annular bushings.

[0149] The upper blocking plate 237 is elliptical in shape with a hole in the middle. Its outer edge is attached to the annular opening of the blocking cylinder 231 and is connected to the blocking cylinder 231 and the lower blocking plate 234 by long bolts.

[0150] The upper bushing 238 is set in the opening of the upper end plate 237, and has an outward flange at the lower end. It can be designed to be spliced ​​together by two semi-ring bushings.

[0151] The upper plug 239 is installed inside the plug cylinder 231. Its lower end passes through the lower bushing 235 and extends into the annular protrusion in the middle of the lower plug 232, where a sealing ring can be installed. Its upper end extends out from the upper bushing 238, and its outer wall has fins. The upper plug 239 has a vertically penetrating cleaning channel, and its outer wall is fitted with the lower bushing 235 and the upper bushing 238 through a stepped structure.

[0152] The upper plug 239 and the upper bushing 238 can be connected by screws.

[0153] The inner torsion spring 236 is installed inside the plug cylinder 231 and sleeved on the outer periphery of the upper plug 239. Its two ends are connected to the plug cylinder 231 and the upper plug 239. Specifically, it can be locked in the slots opened on the plug cylinder 231 and the upper plug 239, so that the wing edge of the upper outer wall of the upper plug 239 is perpendicular to the plug cylinder 231.

[0154] Spring 24 is sleeved on the outer periphery of upper plug 239, with both ends abutting between the stepped part of mounting cylinder 21 and the wing edge of upper plug 239, pressing the wing edge of upper plug 239 tightly against the inner side of cover plate 22.

[0155] When cleaning the compressor blades 4 online using the plug 23, an online cleaning pipeline 52 as shown in Example 1 can be connected to the upper end of the upper plug 239. The cleaning fluid branch pipeline and the air supply branch pipeline of the online cleaning pipeline 52 are connected to the cleaning fluid source and the air source. The cleaning fluid and its airflow are introduced into the coil 233 through the cleaning channel inside the upper plug 239, so that the cleaning fluid and airflow are mixed to form atomized droplets. The droplets are sprayed backward into the compressor stator casing 3 through the online cleaning nozzles of the coil 233 and the lower plug 232. Under the action of the compressor airflow, the compressor blades 4 are cleaned online.

[0156] The upper plug 239 can rotate within the plug cylinder 231, aligning the fin edge with the irregular mounting hole of the cover plate 22, allowing the plug 23 to be removed through the irregular mounting hole of the cover plate 22. When offline deep cleaning of the compressor blades 4 is required, this process can be followed to remove the plug 23 and replace it with the offline cleaning structure 5. The specific process can be referred to the above-mentioned related processes, and will not be elaborated further here.

[0157] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. An integrated structure for inspecting and cleaning the blades of a gas turbine compressor, characterized in that, It includes an online cleaning structure (1) and a plugging structure (2); The online cleaning structure (1) includes a mounting base (11), an annular nozzle (12), a cleaning fluid pipeline (13), and an air inflation pipeline (14); The mounting base (11) is a cylindrical structure, with its lower end extending into the mounting hole opened on the compressor stator casing (3), and has an inward annular folded edge. The inward annular folded edge has multiple online cleaning holes, and the inward annular folded edge is flush with the inner side of the compressor stator casing (3); the upper end of the mounting base (11) has an outward annular folded edge. The annular nozzle (12) is a hollow ring and is set inside the mounting base (11), abutting against the inner annular folded edge of the mounting base (11), and has a nozzle that is aligned with the online cleaning hole on the mounting base (11). The inlet end of the cleaning fluid pipeline (13) is connected to the cleaning fluid source, and the outlet end passes through the opening on the side wall of the mounting base (11), bends downward, and connects to the annular nozzle (12). The inlet end of the inflation pipe (14) is connected to the air source, and the outlet end passes through the opening on the side wall of the mounting base (11), bends downward, and connects to the annular nozzle (12). The plugging structure (2) includes a mounting cylinder (21), a cover plate (22), a plug (23), and a spring (24); The mounting cylinder (21) is stepped and is set inside the mounting base (11). The small end abuts against the inward annular folded edge of the mounting base (11), the stepped part presses against the annular nozzle (12), and the large end has an outward annular folded edge, which is connected to the outward annular folded edge of the mounting base (11). The cover plate (22) is connected to the outward annular folded edge of the mounting cylinder (21), and has an irregularly shaped mounting hole, which can be an elliptical hole, a racetrack-shaped hole or a waist-shaped hole; the inner side of the cover plate (22) has an annular support edge, which extends into the large end of the mounting cylinder (21) and abuts against the step part of the mounting cylinder (21); The plug (23) is set inside the annular support edge of the cover plate (22), and its lower end passes through the small end of the mounting cylinder (21) and extends into the middle part of the inward annular folded edge of the mounting base (11), and is flush with the inner side of the compressor stator casing (3). The upper outer wall of the plug (23) has fins. The spring (24) is installed inside the annular support edge of the cover plate (22), sleeved on the outer periphery of the plug (23), with both ends abutting between the step part of the mounting cylinder (21) and the wing edge of the plug (23), pressing the wing edge of the plug (23) tightly against the inner side of the cover plate (22); The plug (23) can rotate within the annular support edge of the cover plate (22) so that the wing edge is aligned with the irregular mounting hole of the cover plate (22), and the plug (23) can be removed through the irregular mounting hole of the cover plate (22).

2. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 1, characterized in that, The outer wall of the mounting base (11) has an annular mounting edge, which is pressed against the annular boss provided on the compressor stator casing (3); The cross-section of the annular nozzle (12) is flat and round; The portion of the cleaning fluid pipeline (13) inside the mounting base (11) is designed as a spiral pipe; The portion of the inflation pipe (14) inside the mounting base (11) is designed as a spiral pipe; The annular nozzle (12) is welded to the cleaning fluid pipeline (13) and the air inflation pipeline (14) into a single structure; The annular nozzle (12) is welded to the inward annular folded edge of the mounting base (11).

3. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 2, characterized in that, The wing angle of the plug (23) is 90° off from the irregular mounting hole on the cover plate (22); The plug (23) has a threaded hole at the upper end for threaded connection with a long rod-type tool.

4. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 1, characterized in that, It also includes an offline cleaning structure (5); The offline cleaning structure (5) includes an offline cleaning nozzle (51) and an offline cleaning pipeline (52); The offline cleaning nozzle (51) is set inside the annular support edge of the cover plate (22). Its lower end passes through the small end of the mounting cylinder (21) and the middle part of the inner annular folded edge of the mounting base (11), and extends into the compressor stator casing (3). It has an offline cleaning nozzle opening to the rear, facing the compressor blade (4). The upper end of the offline cleaning nozzle (51) extends out from the irregular mounting hole of the cover plate (22), and the end has an offline cleaning through hole, which is connected to the offline cleaning nozzle at the lower end through the internal channel of the offline cleaning nozzle (51). The outer wall of the offline cleaning nozzle (51) has fins. The spring (24) is sleeved on the outer periphery of the offline cleaning nozzle (51), and its two ends abut against the step part of the mounting cylinder (21) and the fins of the offline cleaning nozzle (51), pressing the fins of the outer wall of the offline cleaning nozzle (51) against the inner side of the cover plate (22). The outlet end of the offline cleaning pipeline (52) is connected to the upper end of the offline cleaning nozzle (51), and the inlet end is branched to form a cleaning liquid branch pipeline and an air filling branch pipeline, which are respectively connected to the cleaning liquid source and the air source; The offline cleaning nozzle (51) can rotate within the annular support edge of the cover plate (22) so that its upper wing edge is aligned with the irregular mounting hole of the cover plate (22), and thus the offline cleaning nozzle (51) can be removed through the irregular mounting hole of the cover plate (22).

5. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 4, characterized in that, The upper ends of the offline cleaning pipeline (52) and the offline cleaning nozzle (51) are connected by threads.

6. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 1, characterized in that, The offline cleaning structure (5) includes an outer cylinder (53), a lower end (54), an arc-shaped tube (55), a lower end plate (56), a lower bushing (57), a torsion spring (58), an upper end plate (59), an upper bushing (510), and an upper end (511). The outer cylinder (53) is elliptical and is set inside the annular support edge of the cover plate (22). It has an inward annular fold at the lower end and an annular opening at the upper end. The lower end (54) is elliptical, the upper end face has an arc-shaped groove and an annular protrusion, the middle part of the annular protrusion is connected to the middle part of the inner annular fold of the outer cylinder (53), and the outer side of the annular protrusion has an annular groove. The lower end (54) passes through the small end of the mounting cylinder (21) and the middle part of the inner annular fold of the mounting base (11), and extends into the compressor stator casing (3). Multiple offline cleaning nozzles are opened to the rear and face the compressor blades (4). The arc-shaped tube (55) is set in the arc-shaped slot of the lower end (54) and is connected to the annular protrusion of the middle part of the lower end (54) through the internal channel of the lower end (54). An offline cleaning nozzle aligned with the offline cleaning nozzle of the lower end (54) is provided on it. The lower end plate (56) is elliptical and is fitted around the annular protrusion of the lower end (54) and is locked in the annular groove of the annular protrusion, covering the arc-shaped slot of the lower end (54). The lower bushing (57) is provided in the middle of the inward annular folded edge of the outer cylinder (53), and has an outward flange at the upper end, which presses on the inward annular folded edge of the outer cylinder (53). The upper bushing (510) is set in the opening of the upper end plate (59) and has an outward flange at the lower end; The upper end (511) is installed inside the outer cylinder (53), the lower end passes through the lower bushing (57) and extends into the annular protrusion in the middle of the lower end (54), the upper end extends out from the upper bushing (510), and the outer wall has fins; the upper end (511) has a vertically penetrating cleaning channel inside, and the outer wall is fitted with the lower bushing (57) and the upper bushing (510) through a stepped structure; The torsion spring (58) is installed inside the outer cylinder (53), sleeved on the outer periphery of the upper end (511), and its two ends are connected to the outer cylinder (53) and the upper end (511), so that the wing edge of the upper outer wall of the upper end (511) remains perpendicular to the outer cylinder (53). The spring (24) is sleeved on the outer periphery of the upper end (511), with both ends abutting between the stepped part of the mounting cylinder (21) and the wing edge of the upper end (511), pressing the wing edge of the upper end (511) tightly against the inner side of the cover plate (22). The upper end (511) can rotate inside the outer cylinder (53) to align the fin with the irregular mounting hole of the cover plate (22), thereby allowing the offline cleaning nozzle (51) to be removed through the irregular mounting hole of the cover plate (22).

7. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 6, characterized in that, The lower end plate (56) is made of two semi-elliptical plates joined together; The lower bushing (57) is composed of two semi-ring bushings joined together; The upper end plate (59) is elliptical with a hole in the middle. Its outer edge is attached to the annular opening of the outer cylinder (53) and is connected to the outer cylinder (53) and the lower end plate (56) by long bolts. The upper bushing (510) is composed of two semi-ring bushings joined together; A sealing ring is provided between the lower end of the upper end (511) and the middle part of the annular protrusion of the lower end (54); The upper end (511) and the upper bushing (510) are connected by screws; The two ends of the torsion spring (58) are locked in the slots opened on the outer cylinder (53) and the upper end (511).

8. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 7, characterized in that, The upper bushing (510) has a stop protrusion on the outward flange edge, and the upper end plate (59) has a stop groove on the inner wall, with the stop protrusion inserted into the stop groove.

9. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 8, characterized in that, The cover plate (22) has two axial grooves on its annular support edge and a circumferential groove communicating with the axial grooves. The two axial grooves form openings at the edge of the irregular mounting hole of the cover plate (22). The wing of the upper end head (511) rotates into the circumferential groove through the two axial grooves. The wing of the upper end head (511) has two stop protrusions. When the wing of the upper end head (511) is pressed against the inside of the cover plate (22), the two stop protrusions are stuck in the irregular mounting hole of the cover plate (22).

10. The integrated structure for inspecting and cleaning the gas turbine compressor and its blades according to claim 1, characterized in that, The plug (23) includes a plug cylinder (231), a lower plug (232), a coil (233), a lower plug plate (234), a lower bushing (235), an inner torsion spring (236), an upper plug plate (237), an upper bushing (238), and an upper plug (239); The plug (231) is elliptical and is set inside the annular support edge of the cover plate (22). It has an inward annular fold at the lower end and an annular opening at the upper end. The lower plug (232) is elliptical, with an arc-shaped groove on the upper end face and an annular protrusion. The middle part of the annular protrusion is connected to the middle part of the inward annular fold of the plug cylinder (231), and the outer side of the annular protrusion has an annular groove. The lower end of the plug (232) passes through the small end of the mounting cylinder (21) and is injected into the middle part of the inner annular fold of the mounting base (11), which is flush with the inner side of the compressor stator casing (3). Multiple online cleaning nozzles are provided at the end. The coil (233) is installed in the arc-shaped slot of the lower plug (232) and is connected to the annular protrusion of the middle part of the lower plug (232) through the internal channel of the lower plug (232). An online cleaning nozzle aligned with the online cleaning nozzle of the lower plug (232) is provided on it. The lower end plate (234) is elliptical in shape, fitted around the annular protrusion of the lower end plate (232), and is fitted into the annular groove of the annular protrusion, covering the arc-shaped groove of the lower end plate (232); the lower end plate (234) is made of two semi-elliptical plates spliced ​​together. The lower bushing (235) is set in the middle of the inward annular fold of the plug (231), and has an outward flange at the upper end, which presses on the inward annular fold of the plug (231); the lower bushing (235) is made of two semi-annular bushings spliced ​​together. The upper blocking plate (237) is elliptical with a hole in the middle and its outer edge is attached to the annular opening of the blocking cylinder (231). It is connected to the blocking cylinder (231) and the lower blocking plate (234) by long bolts. The upper bushing (238) is set in the opening of the upper end plate (237), and has an outward flange at the lower end, which is made of two semi-ring bushings spliced ​​together; The upper plug (239) is installed inside the plug cylinder (231). Its lower end passes through the lower bushing (235) and extends into the annular protrusion in the middle of the lower plug (232). A sealing ring can be installed in between. Its upper end extends out from the upper bushing (238) and has fins on its outer wall. The upper plug (239) has a vertically penetrating cleaning channel inside, and its outer wall is fitted with the lower bushing (235) and the upper bushing (238) through a stepped structure. The upper plug (239) and the upper bushing (238) are connected by screws; An inner torsion spring (236) is installed inside the plug cylinder (231), sleeved on the outer periphery of the upper plug (239), with both ends connected to the plug cylinder (231) and the upper plug (239), so that the wing edge of the upper outer wall of the upper plug (239) remains perpendicular to the plug cylinder (231); The spring (24) is sleeved on the outer periphery of the upper plug (239), with both ends abutting between the stepped part of the mounting cylinder (21) and the wing edge of the upper plug (239), pressing the wing edge of the upper plug (239) tightly against the inner side of the cover plate (22); The upper plug (239) can rotate inside the plug cylinder (231) to align the fin with the irregular mounting hole of the cover plate (22), and then the plug (23) can be removed through the irregular mounting hole of the cover plate (22).

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