阅读说明：本技术 适用于蒸汽发生器的多方向射流清洗装置 (Multi-directional jet cleaning device suitable for steam generator ) 是由 武伟让 余桐 叶春 程治峰 杨洵宗 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种适用于蒸汽发生器的多方向射流清洗装置,包括框架组件、设置在所述框架组件上的传动组件、第一喷嘴组件和第二喷嘴组件、以及用于带动所述传动组件运转的电机组件；所述传动组件包括主传动机构、从传动机构、第二喷嘴传动机构以及用于实现所述主传动机构、从传动机构、第二喷嘴传动机构同步转动的同步带；所述电机组件用于驱动所述主传动机构转动；所述第二喷嘴传动机构上设置有第二喷嘴组件,所述主传动机构和/或从传动机构上设置有第一喷嘴组件；所述框架组件包括上盖和下盖,所述第一喷嘴组件和第二喷嘴组件设置在所述下盖上,所述下盖内开设有水流道,所述水流道与所述第二喷嘴组件和第一喷嘴组件连通。(The invention discloses a multidirectional jet flow cleaning device suitable for a steam generator, which comprises a frame component, a transmission component, a first nozzle component, a second nozzle component and a motor component, wherein the transmission component, the first nozzle component and the second nozzle component are arranged on the frame component; the transmission assembly comprises a main transmission mechanism, a slave transmission mechanism, a second nozzle transmission mechanism and a synchronous belt for realizing synchronous rotation of the main transmission mechanism, the slave transmission mechanism and the second nozzle transmission mechanism; the motor assembly is used for driving the main transmission mechanism to rotate; the second nozzle transmission mechanism is provided with a second nozzle assembly, and the main transmission mechanism and/or the auxiliary transmission mechanism are/is provided with a first nozzle assembly; the frame subassembly includes upper cover and lower cover, first nozzle subassembly and second nozzle subassembly set up on the lower cover, the water flow way has been seted up in the lower cover, the water flow way with second nozzle subassembly and first nozzle subassembly intercommunication.)

1. A multi-directional jet flow cleaning device suitable for a steam generator is characterized by comprising a frame assembly, a transmission assembly, a first nozzle assembly, a second nozzle assembly and a motor assembly, wherein the transmission assembly, the first nozzle assembly and the second nozzle assembly are arranged on the frame assembly;

the transmission assembly comprises a main transmission mechanism, a slave transmission mechanism, a second nozzle transmission mechanism and a synchronous belt for realizing synchronous rotation of the main transmission mechanism, the slave transmission mechanism and the second nozzle transmission mechanism; the motor assembly is used for driving the main transmission mechanism to rotate; the second nozzle transmission mechanism is provided with a second nozzle assembly, and the main transmission mechanism and/or the auxiliary transmission mechanism are/is provided with a first nozzle assembly;

the frame subassembly includes upper cover and lower cover, first nozzle subassembly and second nozzle subassembly set up on the lower cover, and a plurality of first nozzle subassembly sets up asymmetrically the both sides of lower cover length direction central line, it has the water runner to open in the lower cover, the water runner with second nozzle subassembly and first nozzle subassembly intercommunication.

2. The multi-directional jet cleaning device of claim 1, wherein the motor assembly comprises a motor and a first bevel gear at an output end of the motor, the motor is configured to rotate the first bevel gear, and the first bevel gear is in contact with the main transmission mechanism.

3. The multi-directional jet flow cleaning device according to claim 2, wherein the main transmission mechanism comprises a first rotating shaft, a second bevel gear, a main synchronizing gear, a main straight gear and a third bevel gear, wherein the second bevel gear, the main synchronizing gear, the main straight gear and the third bevel gear are sequentially sleeved outside the first rotating shaft from top to bottom; the second bevel gear is meshed with the first bevel gear; the third bevel gear is in contact with the first nozzle assembly; the secondary transmission mechanism comprises a second rotating shaft, and a secondary synchronizing wheel, a secondary straight gear and a fourth bevel gear which are sequentially sleeved outside the second rotating shaft from top to bottom; the fourth bevel gear is in contact with the first nozzle assembly.

4. The multi-directional jet cleaning device according to claim 3, wherein the first nozzle assembly comprises a rotating shaft, and a first sealing ring, a transition ring, a first nozzle secondary bearing, a first nozzle bevel gear, a first nozzle bearing, a fixing plate and a nozzle bracket which are sequentially sleeved outside the rotating shaft, wherein a first nozzle is arranged on the nozzle bracket, a first flow passage for communicating the water flow passage with the first nozzle is arranged in the rotating shaft, the fixing plate is fixedly installed on the lower cover, and the first nozzle bevel gear is meshed with the third bevel gear or the fourth bevel gear; the first nozzle secondary bearing and the first nozzle bearing are respectively positioned at two sides of the first nozzle bevel gear, and the transition ring is positioned between the first sealing ring and the first nozzle secondary bearing; the fixed plate is fixed with the outer ring of the first nozzle bearing, the transition ring is fixed with the outer ring of the first nozzle auxiliary bearing, and the inner ring of the first nozzle bearing, the inner ring of the first nozzle auxiliary bearing, the first nozzle bevel gear and the nozzle support are fixedly connected with the rotating shaft.

5. The multi-directional jet cleaning device according to claim 3, wherein the transmission assembly further comprises a sub-transmission mechanism in contact with the main transmission mechanism and/or the sub-transmission mechanism, the sub-transmission mechanism comprises a third rotating shaft and a sub-spur gear and a sub-bevel gear which are sequentially sleeved from top to bottom outside the third rotating shaft, the sub-spur gear is meshed with the main spur gear or the sub-spur gear, the sub-transmission mechanism is correspondingly provided with the first nozzle assembly, and the sub-bevel gear is meshed with the first nozzle bevel gear.

6. The multi-directional jet cleaning device of claim 5, wherein the lower cover is formed with a receiving groove for receiving a part of the first nozzle assembly and a driving groove for the first nozzle bevel gear to leak out, and the first nozzle bevel gear passes through the driving groove to be engaged with the bevel gears at the lower ends of the main transmission mechanism, the auxiliary transmission mechanism and the auxiliary transmission mechanism; the lower cover is provided with a group of second nozzle assemblies and two groups of first nozzle assemblies symmetrically arranged on two sides of the second nozzle assemblies, and each group of first nozzle assemblies comprises two first nozzle assemblies; the second nozzle transmission mechanism is arranged between the main transmission mechanism and the auxiliary transmission mechanism, and a sensor assembly is arranged on the upper cover and used for assisting in positioning the nozzle to align to the center of the pipe gap.

7. The multi-directional jet cleaning device according to claim 5, wherein the second nozzle transmission mechanism comprises a fourth rotating shaft, and an auxiliary synchronizing wheel, an auxiliary bearing and an auxiliary bevel gear which are sequentially sleeved outside the fourth rotating shaft from top to bottom, the auxiliary bearing is fixed on the lower cover, and the auxiliary synchronizing wheel is in contact with the synchronizing belt and rotates synchronously; the second nozzle assembly comprises a rotating frame, a second nozzle bevel gear, a mounting frame and a second nozzle, wherein the second nozzle bevel gear is connected to the rotating frame, the mounting frame is arranged at two ends of the rotating frame, the second nozzle is arranged on the rotating frame, the mounting frame is fixedly arranged on the frame assembly, the second nozzle bevel gear is meshed with the auxiliary bevel gear, and a second flow channel used for communicating the water flow channel and the second nozzle is formed in the rotating frame.

8. The multi-directional jet cleaning device of claim 7, wherein a second nozzle bearing is disposed between the rotating frame and the mounting frame, and second sealing rings are disposed at two ends of the rotating frame; two or more second nozzles are arranged on the rotating frame, and the second nozzles are symmetrically arranged on two sides of the second nozzle bevel gear.

9. The multidirectional jet flow cleaning device as in claim 7, wherein main bearings are arranged at the upper ends of the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft, and the main bearings are fixed on the upper cover; a cavity is formed between the upper cover and the lower cover, and the main synchronizing gear, the auxiliary synchronizing gear, the main straight gear, the auxiliary straight gear and the synchronous belt are contained in the cavity.

10. The multi-directional jet cleaning device of claim 7, wherein the water channel comprises a main channel leg, a first leg connecting the main channel leg to the first channel, and a second leg connecting the main channel leg to the second channel; the section of the main section of the water channel is elliptical; each group of two first nozzle assemblies are asymmetrically arranged on two sides of the main branch section of the water channel; the joint of the first branch section corresponding to each group of two first nozzle assemblies and the water channel main branch section is respectively positioned on two sides of the minor axis of the elliptic water channel main branch section and is asymmetrical relative to the minor axis.

Technical Field

The invention relates to the technical field of steam generator cleaning, in particular to a steam generator cleaning device with multidirectional jet flow in a narrow space.

Background

The steam generator is an important device for two-loop heat exchange in a nuclear power plant, and is internally provided with as many as ten thousand tube bundles. And when the nuclear power plant is shut down and maintained every time, cleaning of the secondary side tube bundle of the steam generator is carried out. With the application of the steam generator in the third-generation nuclear power technology, the development of cleaning technology and equipment is also necessary. For example, the internal structure of a third-generation steam generator designed by the company B & W is more special, the heat transfer tubes are arranged in an equilateral triangle, the central tube corridor area is free of partition plates and is more open, but the width of the central tube corridor is narrower and is only about 100 mm; under the condition of ensuring jet flow parameters and jet flow straightness, the bilateral symmetrical arrangement of the nozzle assemblies cannot be realized, which brings great challenges to the design of a cleaning mechanism.

The existing main stream cleaning mechanism is divided into two parts, one part is cleaning in a direction of 90 degrees with a central pipe gallery; one is the cleaning in the direction of 30 degrees or 150 degrees with the central pipe gallery; the two cleaning mechanisms are used alternately, so that the cleaning time is longer; the cleaning process is usually carried out according to the cleaning process sequence of 90 degrees to 30 degrees to 150 degrees to 90 degrees, but the cleaning mechanism needs to be removed and replaced in the middle process, so that the exposure dose and the labor capacity of certain personnel are increased.

The invention discloses a washing gun with three washing directions, which is disclosed in the Chinese patent with the application number of 201210550000.X and the name of a sludge washing gun with a multi-nozzle structure, but the disclosure of the washing gun discloses that the inclined nozzle assembly of the washing gun is only arranged on one side, the requirement that the rotating directions of nozzles arranged on two sides are consistent with the rotating directions of nozzles arranged on two sides cannot be met, and meanwhile, how to realize transmission between a motor and a gear shaft and the arrangement and circulation design of a water channel in the patent are unclear. The person skilled in the art cannot realize the design of the flushing mechanism of the multi-angle double-side asymmetric nozzle according to the disclosure. Therefore, an efficient cleaning mechanism which can adapt to a narrow use environment, does not need to be replaced and can realize multidirectional jet flow by asymmetrically arranging nozzles on two sides is needed to be designed.

Disclosure of Invention

In view of the above, in order to overcome the defects of the prior art, the present invention provides a multi-directional and bilateral jet cleaning device for nozzles of a steam generator, which can achieve efficient bilateral and multidirectional jet cleaning without replacing the cleaning mechanism in the cleaning process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multi-directional jet flow cleaning device suitable for a steam generator comprises a frame assembly, a transmission assembly, a first nozzle assembly, a second nozzle assembly and a motor assembly, wherein the transmission assembly is arranged on the frame assembly;

the transmission assembly comprises a main transmission mechanism, a slave transmission mechanism, a second nozzle transmission mechanism and a synchronous belt for realizing synchronous rotation of the main transmission mechanism, the slave transmission mechanism and the second nozzle transmission mechanism; the motor assembly is used for driving the main transmission mechanism to rotate; the second nozzle transmission mechanism is provided with a second nozzle assembly, and the main transmission mechanism and/or the auxiliary transmission mechanism are/is provided with a first nozzle assembly;

the frame subassembly includes upper cover and lower cover, first nozzle subassembly and second nozzle subassembly set up on the lower cover, and a plurality of first nozzle subassembly sets up asymmetrically the both sides of lower cover length direction central line, it has the water runner to open in the lower cover, the water runner with second nozzle subassembly and first nozzle subassembly intercommunication. The extending direction of the second nozzle assembly nozzle is not parallel to the extending direction of the first nozzle assembly nozzle, so that the cleaning of the tube bundle in different directions is realized.

In the invention, the nozzle assemblies with different angles are integrated in the same cleaning device, so that the position design of the first nozzle assembly and the second nozzle assembly is carried out according to the principle that the center of the nozzle is aligned with the center of the gap of a certain tube bundle of the steam generator, namely, one nozzle is aligned with the center of the gap of the tube bundle, and the rest nozzles are naturally aligned with the center of the gap of the corresponding tube bundle. Moreover, in order to meet the requirement of cleaning the covered area, the transmission ratio of the transmission mechanism needs to be designed according to the rotation angle range required by the first nozzle assembly and the second nozzle assembly, such as 30-150 degrees of nozzle assembly rotation +/-85 degrees while 90 degrees of nozzle assembly rotation +/-75 degrees is realized.

According to some preferred implementation aspects of the invention, the motor assembly comprises a motor and a first bevel gear at an output end of the motor, the motor is used for driving the first bevel gear to rotate, and the first bevel gear is in contact with the main transmission mechanism.

According to some preferred embodiments of the present invention, the main transmission mechanism includes a first rotating shaft, a second bevel gear, a main synchronizing gear, a main spur gear and a third bevel gear, which are sequentially sleeved outside the first rotating shaft from top to bottom; the second bevel gear is meshed with the first bevel gear; the third bevel gear is in contact with the first nozzle assembly.

According to some preferred implementation aspects of the invention, the slave transmission mechanism comprises a second rotating shaft, and a slave synchronous gear, a slave straight gear and a fourth bevel gear which are sequentially sleeved outside the second rotating shaft from top to bottom; the fourth bevel gear is in contact with the first nozzle assembly.

According to some preferred embodiments of the present invention, the master synchronizing wheel and the slave synchronizing wheel are located on the same plane, and the synchronous belt is sleeved on the master synchronizing wheel and the slave synchronizing wheel.

According to some preferred implementation aspects of the present invention, the first nozzle assembly includes a rotating shaft, and a first sealing ring, a first nozzle bevel gear, a first nozzle bearing, a fixing plate and a nozzle bracket which are sequentially sleeved outside the rotating shaft, the nozzle bracket is provided with a first nozzle, a first flow passage for communicating the water flow passage with the first nozzle is formed in the rotating shaft, the fixing plate is fixedly mounted on the lower cover, and the first nozzle bevel gear is engaged with the third bevel gear or the fourth bevel gear.

According to some preferred aspect of the present invention, the first nozzle assembly includes a transition ring and a first nozzle sub-bearing, the first nozzle sub-bearing and the first nozzle bearing being respectively located on both sides of the first nozzle bevel gear, the transition ring being located between the first seal ring and the first nozzle sub-bearing; the fixed plate is fixed with the outer ring of the first nozzle bearing, the transition ring is fixed with the outer ring of the first nozzle auxiliary bearing, and the inner ring of the first nozzle bearing, the inner ring of the first nozzle auxiliary bearing, the first nozzle bevel gear and the nozzle support are fixedly connected with the rotating shaft.

According to some preferred implementation aspects of the present invention, the transmission assembly further includes an auxiliary transmission mechanism contacting with the main transmission mechanism and/or the auxiliary transmission mechanism, the auxiliary transmission mechanism includes a third rotating shaft, and an auxiliary spur gear and an auxiliary bevel gear sequentially sleeved outside the third rotating shaft from top to bottom, the auxiliary spur gear is engaged with the main spur gear or the auxiliary spur gear, the auxiliary transmission mechanism is correspondingly provided with the first nozzle assembly, and the auxiliary bevel gear is engaged with the first nozzle bevel gear.

According to some preferred embodiments of the present invention, the lower cover is provided with a receiving groove for receiving a part of the first nozzle assembly and a driving groove for the first nozzle bevel gear to leak out, and the first nozzle bevel gear passes through the driving groove to be engaged with bevel gears at lower ends of the main transmission mechanism, the auxiliary transmission mechanism and the auxiliary transmission mechanism.

According to some preferred embodiments of the present invention, the second nozzle transmission mechanism includes a fourth rotating shaft, and an auxiliary synchronizing wheel, an auxiliary bearing and an auxiliary bevel gear sequentially sleeved outside the fourth rotating shaft from top to bottom, the auxiliary bearing is fixed on the lower cover, and the auxiliary synchronizing wheel is in contact with the synchronizing belt and rotates synchronously.

According to some preferred embodiments of the present invention, the second nozzle assembly includes a rotating frame, a second nozzle bevel gear sleeved on the rotating frame, a mounting frame rotatably connected to two ends of the rotating frame, and a second nozzle arranged on the rotating frame, the mounting frame is fixedly mounted on the frame assembly, the second nozzle bevel gear is engaged with the auxiliary bevel gear, and a second flow passage for communicating the water flow passage and the second nozzle is formed in the rotating frame.

According to some preferred implementation aspects of the invention, a second nozzle bearing is arranged between the rotating frame and the mounting frame, and second sealing rings are arranged at two ends of the rotating frame; two or more second nozzles are arranged on the rotating frame, and the second nozzles are symmetrically arranged on two sides of the second nozzle bevel gear.

According to some preferred embodiments of the present invention, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are not located on a straight line along the length direction of the frame assembly, and the upper ends of the rotating shafts are provided with main bearings which are fixed on the upper cover; a cavity is formed between the upper cover and the lower cover, and the main synchronizing gear, the auxiliary synchronizing gear, the main straight gear, the auxiliary straight gear and the synchronous belt are contained in the cavity.

According to some preferred embodiments of the present invention, the water flow passage includes a main channel branch section, a first branch section communicating the main channel branch section with the first flow passage, and a second branch section communicating the main channel branch section with the second flow passage. In some embodiments of the present application, to ensure water flow, the cross section of the main branch section of the water channel is designed to be elliptical, and comprises an inclined section and a horizontal section at the inlet, wherein the inclined section is inclined downwards from the inlet, and the horizontal section is positioned below the first nozzle assembly and the second nozzle assembly; the first branch section and the second branch section are communicated with the horizontal section. The first branch section is vertically arranged, and the second branch section is obliquely arranged. Specifically, the two sides of the horizontal section are respectively provided with a first nozzle assembly, and the two first branch sections are arranged in a staggered manner and respectively distributed on the two sides of the axial lead of the horizontal section. And a second branch transition section is also arranged between the second branch section and the second flow channel and is vertically arranged so as to introduce the water flow in the horizontal section into the second flow channel through the second branch section and the second branch transition section.

According to some preferred embodiments of the present invention, each of the first nozzle assemblies is disposed on one side of the main waterway section in the extending direction, and each set of two first nozzle assemblies is disposed asymmetrically on both sides of the main waterway section; the joint of the first branch section corresponding to each group of two first nozzle assemblies and the water channel main branch section is respectively positioned on two sides of the minor axis of the elliptic water channel main branch section and is asymmetrical relative to the minor axis.

According to some preferred embodiment aspects of the present invention, the transmission assembly includes a tensioning mechanism including a fixed base, a fixed shaft fixed to the fixed base, and an adjustment synchronizing wheel that is in contact with the synchronizing belt and rotates synchronously.

According to some preferred implementation aspects of the invention, the lower cover is provided with a group of second nozzle assemblies and first nozzle assemblies symmetrically arranged on two sides of the second nozzle assemblies, the second nozzle transmission mechanism is arranged between the main transmission mechanism and the auxiliary transmission mechanism, and the jet directions of the nozzles in the first nozzle assemblies are towards the center of the pipe gap.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the beneficial effects that: the multi-direction jet flow cleaning device suitable for the steam generator is reasonable and compact in structural design, the 90-degree nozzle assembly and the 30-150-degree nozzle assembly are integrated in the same cleaning device, nozzles are asymmetrically arranged on two sides, multi-direction jet flow efficient cleaning is achieved, and the problems of replacement and cleaning efficiency of cleaning mechanisms with different jet flow angles are solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a perspective view of a first perspective of a multi-directional jet cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 2 is a perspective view of a second perspective of the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 3 is a front view of a multi-directional jet cleaning apparatus in accordance with a preferred embodiment of the present invention;

FIG. 4 is a perspective view of a motor assembly in the multidirectional jet cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 5 is a perspective view of a transmission assembly in the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 6 is a perspective view of a first nozzle assembly in the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 7 is a cross-sectional view of a first nozzle assembly in the multi-directional jet cleaning apparatus in accordance with the preferred embodiment of the present invention;

FIG. 8 is a perspective view of a second nozzle assembly in the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 9 is a cross-sectional view of a second nozzle assembly in the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 10 is a perspective view of a lower cover of the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 11 is a top view of a lower cover of the multi-directional jet cleaning device in accordance with the preferred embodiment of the present invention;

FIG. 12 is a cross-sectional view taken along line H-H in FIG. 11;

FIG. 13 is a schematic view of the water flow path in the lower cover of the multidirectional jet cleaning device in accordance with the preferred embodiment of the present invention;

in the attached drawings, 1, a motor component; 11. a motor sealing shell; 12. a motor; 13. a first bevel gear; 14. a sealing cover; 2. a transmission assembly; 21. a main transmission mechanism; 211. a first rotating shaft; 212. a second bevel gear; 213. a main synchronizing wheel; 214. a primary spur gear; 215. a third bevel gear; 22. a slave transmission mechanism; 221. a second rotating shaft; 222. a slave synchronizing wheel; 223. from a spur gear; 224. a fourth bevel gear; 23. a secondary drive mechanism; 231. a third rotating shaft; 232. a secondary spur gear; 233. a secondary bevel gear; 24. a second nozzle drive mechanism; 241. a fourth rotating shaft; 242. an auxiliary synchronizing wheel; 243. an auxiliary bearing; 244. an auxiliary bevel gear; 245. fixing a nut; 25. a tensioning mechanism; 251. a fixed seat; 252. a fixed shaft; 253. adjusting the synchronizing wheel; 26. a synchronous belt; 27. a main bearing; 3. a 30-150 nozzle assembly; 31. a rotating shaft; 32. a first seal ring; 33. a transition ring; 34. a first nozzle secondary bearing; 35. a first nozzle bevel gear; 36. a first nozzle bearing; 37. a fixing plate; 38. a nozzle holder; 39. a first nozzle; 310. a first flow passage; 4. a 90 ° nozzle assembly; 41. a mounting frame; 42. a second nozzle bearing; 43. a rotating frame; 44. a second nozzle bevel gear; 45. a second nozzle; 46. a second seal ring; 47. a second flow passage; 5. a water inlet; 6. a frame assembly; 61. an upper cover; 62. a lower cover; 621. a water channel main branch section; 622. a 30-150 degree branch section; 623. a 90 ° branch section; 625. a handle; 626. a weight reduction groove; 627. accommodating grooves; 628. driving grooves 63 and connecting plates; 64. a limiting block; 7. a sensor assembly; 71. rotating the bracket; 72. mounting a plate; 73. a proximity sensor.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a multidirectional jet flow cleaning device suitable for a steam generator of a nuclear power station, and overcomes the defects of inconvenience in replacement and disassembly, low working efficiency and the like in the working process of a single jet flow direction cleaning mechanism used in the current nuclear power stations at home and abroad. According to the invention, the motor component is adopted to drive the 30-150-degree nozzle component (first nozzle component) and the 90-degree nozzle component (second nozzle component) to jet water to rotate between the tube bundles by utilizing the transmission component, so that the requirement of whole-area coverage between the tube bundles is met, the cleaning effect is ensured, and the cleaning efficiency is better. The invention is mainly characterized in that a plurality of asymmetric first nozzle assemblies and second nozzle assemblies on two sides are arranged to achieve the aim of multi-directional jet flow on the premise of ensuring that the width size of the whole cleaning device is small, so that the cleaning device can be better cleaned.

As shown in fig. 1 to 13, the multi-directional jet cleaning device for a steam generator in the present embodiment includes a frame assembly 6, a transmission assembly 2 disposed on the frame assembly 6, a first nozzle assembly and a second nozzle assembly, and a motor assembly 11 for driving the transmission assembly 2 to operate. The first nozzle assembly in this embodiment is the 30-150 nozzle assembly 3 and the second nozzle assembly is the 90 nozzle assembly 4. The transmission assembly 2 comprises a main transmission mechanism 21, a slave transmission mechanism 22, a second nozzle transmission mechanism 24, a slave transmission mechanism 23 and a synchronous belt 26 for realizing synchronous rotation of the main transmission mechanism 21, the slave transmission mechanism 22, the second nozzle transmission mechanism 24 and the slave transmission mechanism 23, and the motor assembly 11 is used for driving the main transmission mechanism 21 to rotate. The frame assembly 6 comprises an upper cover 61 and a lower cover 62, the first nozzle assembly and the second nozzle assembly are arranged on the lower cover 62, a water flow channel is formed in the lower cover 62, and the water flow channel is communicated with the second nozzle assembly and the first nozzle assembly to realize water supply. The extending direction of the second nozzle assembly nozzle is not parallel to the extending direction of the first nozzle assembly nozzle, so that the cleaning of the tube bundle in different directions is realized.

The following detailed description of the various components:

1. first nozzle assembly

As shown in fig. 6 to 7, the 30-150 ° nozzle assembly 3 (first nozzle assembly) in this embodiment includes a rotating shaft 31, a first sealing ring 32, a transition ring 33, a first nozzle secondary bearing 34, a first nozzle bevel gear 35, a first nozzle bearing 36, a fixing plate 37, a nozzle bracket 38, and a first nozzle 39 disposed on the nozzle bracket 38, where the first nozzle 39 is used to ensure linearity of water jet and further ensure cleaning effect. The first nozzle sub-bearing 34 and the first nozzle bearing 36 are respectively located on both sides of the first nozzle bevel gear 35, and the transition ring 33 is located between the first seal ring 32 and the first nozzle sub-bearing 34.

The fixed plate 37 is fixed to the outer ring of the first nozzle bearing 36, the transition ring 33 is fixed to the outer ring of the first nozzle sub-bearing 34, and the inner ring of the first nozzle bearing 36, the inner ring of the first nozzle sub-bearing 34, the first nozzle bevel gear 35, and the nozzle holder 38 are fixedly connected to the rotary shaft 31. The rotating shaft 31 is internally provided with a first flow passage 310 for communicating the water flow passage with the first nozzle 39, the fixing plate 37 is fixedly installed on the lower cover 62, and the first nozzle bevel gear 35 is engaged with the bevel gear in the transmission assembly 2.

2. Second nozzle assembly

As shown in fig. 7 to 8, the 90 ° nozzle assembly 4 (second nozzle assembly) in this embodiment includes a rotating frame 43, a second nozzle bevel gear 44 sleeved on the rotating frame 43, a mounting frame 41 connected to both ends of the rotating frame 43, a second nozzle bearing 42 installed between the rotating frame 43 and the mounting frame 41, and a second nozzle 45 arranged on the rotating frame 43, wherein the mounting frame 41 is fixedly installed on the frame assembly 6, the second nozzle bevel gear 44 is engaged with a bevel gear on the second nozzle transmission mechanism 24, and a second flow passage 47 for communicating a water flow passage with the second nozzle 45 is formed in the rotating frame 43. The two end portions of the rotating frame 43 are provided with second seal rings 46. In the present embodiment, two second nozzles 45 are symmetrically disposed on the rotating frame 43 with respect to the second nozzle bevel gear 44.

3. Motor assembly 11

As shown in fig. 4, the motor assembly 11 in this embodiment is mounted on the upper cover 61 of the frame assembly 6, and includes a motor sealing case 11, a motor 12, a first bevel gear 13, and a sealing cover 14. An output shaft of the motor 12 is connected with the first bevel gear 13 and is used for driving the first bevel gear 13 to rotate; the motor 12 is installed in the motor sealing shell 11, and forms a sealed environment for the motor 12 together with the sealing cover 14.

4. Transmission assembly 2

As shown in fig. 5, the driving assembly 2 in this embodiment includes a timing belt 26, a master driving mechanism 21 contacting the timing belt 26, a slave driving mechanism 22, a second nozzle driving mechanism 24, a tensioning mechanism 25, and a slave driving mechanism 23 driven by the master driving mechanism 21 or the slave driving mechanism 22 to rotate.

The main transmission mechanism 21 comprises a first rotating shaft 211, a main bearing 27, a second bevel gear 212, a main synchronizing gear 213, a main straight gear 214, an auxiliary bearing 243 and a third bevel gear 215 which are sequentially sleeved outside the first rotating shaft 211 from top to bottom; the second bevel gear 212 is meshed with the first bevel gear 13; the third bevel gear 215 meshes with the first nozzle bevel gear 35 of the first nozzle assembly.

The slave transmission mechanism 22 comprises a second rotating shaft 221, a main bearing 27, a slave synchronous gear 222, a slave straight gear 223, an auxiliary bearing 243 and a fourth bevel gear 224, wherein the main bearing 27, the slave synchronous gear 222, the slave straight gear 223, the auxiliary bearing 243 and the fourth bevel gear 224 are sequentially sleeved outside the second rotating shaft 221 from top to bottom; the fourth bevel gear 224 is engaged with the first nozzle bevel gear 35 of the first nozzle assembly. The main synchronizing wheel 213 and the slave synchronizing wheel 222 are located on the same plane, and the synchronous belt 26 is sleeved on the main synchronizing wheel 213 and the slave synchronizing wheel 222.

The auxiliary transmission mechanism 23 comprises a third rotating shaft 231, and a main bearing 27, an auxiliary straight gear 232, an auxiliary bearing 243 and an auxiliary bevel gear 233 which are sequentially sleeved outside the third rotating shaft 231 from top to bottom, wherein the auxiliary straight gear 232 is meshed with the main straight gear 214 or the auxiliary straight gear 223, the auxiliary transmission mechanism 23 is correspondingly provided with a first nozzle assembly, and the auxiliary bevel gear 233 is meshed with the first nozzle bevel gear 35.

The second nozzle transmission mechanism 24 includes a fourth rotating shaft 241, and a main bearing 27, an auxiliary synchronizing wheel 242, a fixing nut 245, an auxiliary bearing 243, and an auxiliary bevel gear 244, which are sequentially sleeved outside the fourth rotating shaft 241 from top to bottom, wherein the auxiliary bevel gear 244 and the second nozzle bevel gear 44 in the second nozzle group assembly form a bevel gear set. A fixing nut 245 and an auxiliary bearing 243 are fixed to the lower cover 62, and the auxiliary timing wheel 242 is in contact with the timing belt 26 and rotates in synchronization therewith.

The tensioning mechanism 25 includes a fixed seat 251, a fixed shaft 252 fixed on the fixed seat 251, and an adjusting synchronous wheel 253, wherein the adjusting synchronous wheel 253 is in contact with the synchronous belt 26 and rotates synchronously. The fixing seat 251 is provided with an adjusting groove, and the position of the synchronous wheel 253 can be adjusted through the adjusting groove and a fixing piece in the adjusting groove, so that the tension of the synchronous belt 26 can be adjusted.

In this embodiment, the first rotating shaft 211, the second rotating shaft 221, the third rotating shaft 231, and the fourth rotating shaft 241 are all provided with main bearings 27 at the upper ends thereof, and auxiliary bearings 243 at the lower ends thereof above the bevel gears, and the main bearings 27 are fixed to the upper cover 61. A cavity is formed between the upper cover 61 and the lower cover 62, and the main synchronizing gear 213, the sub synchronizing gear 222, the main spur gear 214, the sub spur gear 223, and the timing belt 26 are accommodated in the cavity. The position and the operational stability of the respective transmission mechanisms are ensured by the main bearing 27 and the auxiliary bearing 243.

5. Frame assembly 6

As shown in fig. 1 to 3 and fig. 10 to 13, the frame assembly 6 in this embodiment includes an upper cover 61, a lower cover 62, a connecting plate 63, and a stopper 64. The inside high pressure water runner that is provided with of lower cover 62 includes: a main channel branch segment 621, a 30-150 degree branch segment 622 communicating the main channel branch segment 621 to the first flow passage 310 of the 30-150 degree nozzle assembly 3, and a 90 degree branch segment 623 communicating the main channel branch segment 621 to the second flow passage 47 of the 90 degree nozzle assembly 4. High-pressure water enters the water channel main branch section 621 from the water inlet 5, enters the first flow channel 310 through the 30-150-degree branch section 622, further enters the first nozzle assembly and is sprayed out by the first nozzle 39; through the 90 branch 623 into the second flow path 47 and further into the second nozzle assembly for ejection by the second nozzle 45.

As shown in fig. 11-13, the cross-section of the waterway main branch segment 621 in this embodiment is designed to be elliptical, and includes an inclined segment at the inlet and a horizontal segment, the inclined segment is inclined downwards from the inlet, and the horizontal segment is located below the first nozzle assembly and the second nozzle assembly; the first and second branch sections 622 and 623 communicate with the horizontal section. The first branch section 622 is perpendicular to the horizontal section and the second branch section 623 is disposed obliquely. Specifically, two first nozzle assemblies are respectively arranged on two sides of the horizontal section, and the two first branch sections 622 are arranged in a staggered manner and respectively distributed on two sides of the axial lead of the horizontal section, namely, the two first branch sections are respectively located on two sides of the minor axis of the main branch section of the oval water channel and are asymmetric with respect to the minor axis. A second branch transition section is further arranged between the second branch section 623 and the second flow channel 47, and the second branch section 623 and the second branch transition section are vertically arranged so as to be used for introducing the water flow in the horizontal section into the second flow channel 47 through the second branch section 623 and the second branch transition section. Through the arrangement of the water channel, the device has a compact structure, and meanwhile, the water channel is communicated, and the water channel is relatively convenient to manufacture. If the second branch section 623 is manufactured, the second branch transition section and the horizontal section are penetrated from outside to inside, then the outer end of the second branch section 623 is plugged, and other water channels are arranged in a similar manner.

As shown in fig. 11, two sets of first nozzle assemblies are symmetrically arranged on both sides of the center line in the width direction of the lower cover (vertical direction in fig. 11), and two first nozzle assemblies in each set are asymmetrically arranged on both sides of the center line in the length direction of the lower cover (horizontal direction in fig. 11); meanwhile, as shown in fig. 5, the corresponding transmission mechanisms cannot be distributed on the same straight line, and the center lines of the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are not on the same straight line along the length direction of the frame assembly and are synchronously driven by a synchronous belt. Through such setting, belt cleaning device compact structure can guarantee transmission effect and cleaning performance simultaneously.

In the embodiment, in order to ensure the strength and facilitate carrying, a plurality of weight-reducing grooves 626 are processed on the lower cover 62; one of which is provided as a handle 625. The upper cover 61 and the lower cover 62 are connected through bolts and sealing strips, and the connecting plate 63 and the limiting block 64 are arranged at the bottom end of the lower cover 62, so that the whole cleaning device is convenient to match with other movable carriers; the water inlet 5 is installed on the end surface of the lower cover 62 and is communicated with the water passage main branch section 621.

In this embodiment, the lower cover 62 is formed with a receiving groove 627 for receiving a part of the first nozzle assembly and a driving groove 628 for the first nozzle bevel gear 35 to leak out, and the first nozzle bevel gear 35 passes through the driving groove 628 to mesh with the bevel gears at the lower ends of the main transmission mechanism 21, the auxiliary transmission mechanism 22 and the auxiliary transmission mechanism 23.

The lower cover 62 in this embodiment is provided with a second nozzle assembly and four first nozzle assemblies symmetrically arranged on two sides of the second nozzle assembly, and the jet directions of the nozzles in the four first nozzle assemblies are different from each other and different from the jet direction of the second nozzle, so as to clean the tube bundles in different directions. The second nozzle gear 24 is disposed between the master gear 21 and the slave gear 22.

The upper cover 61 in this embodiment is further provided with a sensor assembly 7, which includes a mounting plate 72, and a proximity sensor 73 mounted on the mounting plate 72; the mounting plate 72 is mounted on the upper cover 61 by a rotating bracket 71 to adjust the angle of the mounting plate 72. The proximity sensor 73 is used to control the precise displacement of the other moving carrier so that the nozzle can be aligned with the center of the tube gap, and in some cases, replaced with a small camera.

The multi-directional jet flow cleaning device for the steam generator of the nuclear power station comprises a motor assembly, a transmission assembly, a 30-150-degree nozzle assembly, a 90-degree nozzle assembly, a water inlet, a frame assembly and a sensor assembly. The motor assembly is meshed with the transmission assembly through a bevel gear set; the transmission assembly is meshed with the 90-degree nozzle assembly or the 30-150-degree nozzle assembly through a bevel gear set, the frame assembly is connected with and provided with a motor assembly, the 90-degree nozzle assembly and the 30-150-degree nozzle assembly, and a water supply channel for the 90-degree nozzle assembly and the 30-150-degree nozzle assembly is formed in the frame assembly; the sensor assembly is mounted on the frame assembly for ensuring that the multi-directional jet nozzle is aligned with the center of the tube gap. The water jet directions of the 90-degree nozzle assembly and the 30-150-degree nozzle assembly are consistent with the distribution of the heat transfer pipe bundle, and the rotating angles of the two assemblies need to meet the requirement of covering the cleaning distance of the pipe bundle; after the motor element supplies power, 90 nozzle assembly and 30-150 nozzle assembly can be driven simultaneously to rotate according to proper angles, the rotation of different angles of two kinds of nozzles is realized simultaneously through the positive rotation and the reverse rotation of the same motor, the direction of water jet is right opposite to the space between pipes, the requirement of whole-area coverage between pipe bundles is further met, the equipment replacement in the cleaning working process is reduced, the cleaning effect is guaranteed, the cleaning efficiency can be improved, and the exposure dose of field operation personnel is reduced.

The cleaning device with multidirectional jet flow has the following advantages: the power source is a motor assembly, and the 90-degree nozzle assembly and the 30-150-degree nozzle assembly are simultaneously driven by the transmission assembly, so that multi-directional jet flow cleaning at the position between every two pipes is realized; the positions and the directions of the jet flows of the 90-degree nozzle assembly and the 30-150-degree nozzle assembly are consistent with those of the tubes arranged in the heat transfer tube bundle, so that water flow is ensured to be injected into the tubes, and meanwhile, the design of a transmission system ensures that the rotation angles of the 90-degree nozzle assembly and the 30-150-degree nozzle assembly meet the requirement of cleaning the whole area covering the direction; the design of the high-pressure water channel enables the requirements of space and strength to be met, the requirements of flow and sealing to be met, and the flow requirement of the multi-jet angle cleaning structure in the aspect of high-pressure water supply is met.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.