CN212841655U - Boiler pipeline cinder comprehensive cleaning device - Google Patents

Abstract

The utility model provides a cleaning device is synthesized to boiler pipeline cinder, includes the protective sheath and can break away from the pipeline crawl ware of settling in the protective sheath inside, and the pipeline crawl ware has a frame, is provided with scalable supporting mechanism, crawl wheel in the both sides of frame, installs rotation axis and rotating electrical machines in the frame, is fixed with the nozzle shell on the rotation axis, installs scalable nozzle in the nozzle shell, and one side of the inherent nozzle shell of frame is provided with the endoscope. This scheme is through the innovative design to synthesizing cleaning device, only need cut off a small amount of final superheater collection case access holes, very few reheater inlet tube can be put into use, the risk of falling in the construction high altitude has been stopped, avoid again, the life of superheater pipe reduces, can easily must be located the light effluvium of elbow cinder of pipeline bottom, it is effectual to the clearance discharge of cinder, high efficiency, the maintenance expense is about 3% of former scheme, a large amount of maintenance expenses have been saved, thermal power factory economic nature is improved, reliability.

Description

Boiler pipeline cinder comprehensive cleaning device

Technical Field

The utility model relates to a thermal power factory boiler clearance technical field, in particular to boiler pipeline cinder integrated cleaning device.

Background

At present, because the high-temperature reheater and the final superheater (hereinafter referred to as reheater and superheater) of a thermal power plant with a supercritical temperature are high in operation parameters and are influenced by factors such as high-temperature oxidation resistance of materials, high-temperature flue gas of a hearth, arrangement of a heating surface, flow distribution and the like, high-temperature oxide skin generated in a pipe wall is inevitable and is easy to fall off.

At high temperature, iron in the high-temperature steam pipe reacts with water vapor to form iron oxide series such as Fe3O4, Fe2O3, FeO, and hydrogen gas is released. Because the thermal expansion coefficients of oxides such as Fe3O4, Fe2O3, FeO and the like and an iron matrix on a heating surface are different, the oxides are easy to peel off when the temperature change range is large, most of peeled-off oxide skin flows along with steam and is brought into a steam turbine, and the oxide skin can be deposited at the bottom of a U-shaped elbow of a vertical tube panel to block the flow of the steam under certain conditions, and the schematic diagram of the conventional boiler pipeline can refer to the attached figure 1.

When the boiler is not stable in combustion during blowing out, when thermal load fluctuation is large, and the temperature change of the wall of the tube is overlarge, the thermal expansion of the oxide scale layer is inconsistent with that of the base material of the boiler tube, so that the oxide scale layer is cracked, the oxide scale is instantly dropped in a large area, steam in the tube cannot be taken away in time (the pressure difference between the inlet end and the outlet end of the tube is only about 0.3MPa, and the vertical height from the bottom elbow to the tail outlet end of the tube is 13-14 m), the dropped oxide scale is blocked at the elbow, if the boiler is not cleaned in time, the flow in the boiler tube is reduced in the starting process of the boiler, so that the tube is overheated and explodes.

Normally, the furnace is shut down to clean the scale, the lower bend of each pipe on the heating surface is cut, the scale is sucked out by a dust collector or a magnetic rod, and then the welding is resumed. The number of the secondary pipes and the final pipes is huge, for example, a boiler of a Hapan HG-1950/25.4-YM1 type is taken as an example, the number of the secondary pipes and the superheater pipes is about 1500, one welded junction needs to consume 2000 yuan, 300 million yuan is needed in the process of removing the oxide skin, the construction process has great high-altitude falling safety risk, the service life of the secondary pipes and the superheater pipes can be reduced by additionally adding one welded junction of the pipes, and the economic efficiency and the reliability of a thermal power plant are both low.

In view of this, how to solve meeting that exists in the present supercritical thermal power factory boiler cinder clearance scheme and need spend very long time, reduce the normal in service life-span of pipe, consume huge maintenance cost, increase the high altitude construction risk of falling, all bring unfavorable factor scheduling problem to planned maintenance time limit, maintenance cost, safety control, the equipment reliability of power plant, just become the utility model discloses the subject that the research was solved.

Disclosure of Invention

The utility model provides a boiler pipeline cinder integrated cleaning device, its purpose will be arranged in solving the meeting that exists in the present supercritical thermal power factory boiler cinder clearance scheme and need spend very long time, reduce the normal labour life-span of pipe, consume huge maintenance cost, increase the high altitude construction risk of falling, the planned maintenance time limit for a project to the power plant, maintenance cost, safety control, the equipment reliability all brings unfavorable factor scheduling problem, thereby make the required expense greatly reduced of clearance boiler pipeline cinder, the safety risk is almost zero.

In order to achieve the above object, the utility model provides a cleaning device is synthesized to boiler pipeline cinder should synthesize cleaning device and enter into the inside of entry collection case pipeline via the manhole of boiler entry collection case for thermal power factory boiler receives the cinder that the hot side pipeline overhauld and sweeps clearance, its characterized in that:

the comprehensive cleaning device comprises a protective sleeve and a pipeline crawler which can be detachably arranged in the protective sleeve, the protective sleeve is arranged in a roughly horizontal extending mode, the pipeline crawler is provided with a rack, telescopic supporting mechanisms are arranged on two sides of the rack, crawling wheels are connected to the periphery of each telescopic supporting mechanism in a circumferential direction, and the crawling wheels are driven by a motor to drive the pipeline crawler to crawl forwards and backwards in a pipeline;

the rack is provided with a rotating shaft and a rotating motor, the axis of the rotating shaft is parallel to the axis of the protective sleeve, and the rotating motor is in transmission connection with the rotating shaft;

a nozzle shell is fixed on the rotating shaft, a telescopic nozzle is installed in the nozzle shell, an air inlet and an air outlet are formed in the telescopic nozzle, the aperture of the air inlet is larger than that of the air outlet, and the rotating motor drives the rotating shaft to rotate so that the nozzle shell and the telescopic nozzle can rotate along the axial direction of the rotating shaft;

an endoscope is arranged on one side of the nozzle shell in the machine frame;

a first compressed air pipe and a signal transmission cable are arranged inside the protective sleeve and extend along the axial direction of the protective sleeve; the first compressed air pipe is communicated with the air inlet of the telescopic nozzle to transmit compressed air, and the compressed air is sprayed out of the air outlet; the signal transmission cable is connected with the endoscope for signal transmission.

The related content of the utility model is explained as follows:

1. in the utility model, the telescopic nozzle comprises an inner hoop and a balloon structure, the inner hoop is fixed in the nozzle shell, and the balloon structure is arranged on the inner hoop; the balloon structure is provided with double-layer rubber walls, an inflation space is arranged between the double-layer rubber walls, the double-layer rubber walls of the balloon structure form an inverted cone with a bottom surface parallel to the cross section, a through hole is formed in the center line of the cone, a plurality of balloon air inlets are formed in the double-layer rubber walls above the cone, the air inlets are formed in the balloon air inlets and the through hole of the cone, the air outlets are formed below the inverted cone, when compressed air is continuously input into the first compressed air pipe, the air continuously enters the balloon air inlets and the through hole, the air entering the balloon air inlets can stretch and expand the balloon structure with the double-layer rubber walls to the direction of a small opening of the inverted cone, and the expanded double-layer rubber walls extend to the pipe outlet of the collecting box;

2. in the utility model, the double-layer rubber wall is made of natural rubber, ethylene propylene diene monomer, chloroprene rubber or reclaimed rubber, so that the double-layer rubber wall has good tensile rate, and meanwhile, the air tightness is ensured when the double-layer rubber wall expands and extends to the outlet pipe orifice of the inlet header; the inflatable body of the inflatable supporting mechanism can also adopt natural rubber, ethylene propylene diene monomer, chloroprene rubber or reclaimed rubber;

3. in the utility model, the telescopic supporting mechanism is an inflatable supporting mechanism, the inflatable supporting mechanism comprises an inflatable body, flat plates for fixing the crawling wheel are arranged on the upper surface and the lower surface of the inflatable body, the inflatable body is connected with a second compressed air pipe, the second compressed air pipe is communicated with a first compressed air pipe, a solenoid valve is arranged on the second compressed air pipe, when the comprehensive cleaning device is placed in the inlet header pipeline, the solenoid valve on the second compressed air pipe is opened, the first compressed air pipe inflates the inflatable body through the second compressed air pipe, after the inflatable body expands to a certain degree, the size of the inflatable supporting mechanism and the inner wall of the inlet header keep a certain gap, and the comprehensive cleaning device can move back and forth in the inlet header by the crawling wheel;

4. in the utility model, the telescopic supporting mechanism is formed by stacking a plurality of parallelogram mechanisms, each parallelogram mechanism comprises parallel connecting rods, and the crawling wheels are arranged at the end parts of the parallel connecting rods at the top and the bottom;

5. the utility model discloses in, be provided with the switch on the first compressed air pipe, can be blown by this on-off control clearance.

Because of the application of above-mentioned scheme, compared with the prior art, the utility model have following advantage and effect:

1. by applying the comprehensive cleaning device in the scheme of the utility model, when the oxide skin of the boiler heating surface pipeline maintenance of the thermal power plant is cleaned, the comprehensive cleaning device can be put into use only by cutting off a small amount of final superheater header access holes and a very small amount of reheater inlet pipes, the maintenance cost is about 3% of the original scheme, and a large amount of maintenance cost is saved;

2. in the above scheme of the utility model, through the innovative design of the comprehensive cleaning device, the operation position when using the comprehensive cleaning device is at the inlet header, and the access hole on the inlet header in the boiler system is positioned on the boiler ceiling, and the inlet of the reheater is positioned on the platform, which is equivalent to changing the position of the welding opening in operation, and the risk of falling from the high altitude in construction is eliminated;

3. the above technical scheme of the utility model, because only need to cut off a small amount of final superheater header access holes, a few reheater inlet tubes can satisfy the clearance demand of cinder, avoided cutting off, welding the weld bead on each, superheater pipe again, avoid, the service life of superheater pipe again, improve thermal power plant economic nature, reliability;

4. the above technical scheme of the utility model in through the outlet pipe pore department inside the entry header directly blow by synthesizing cleaning device, can easily must be located the light effluvium of elbow cinder of pipeline bottom to make the cinder pile up in the export header, discharge effectual, efficient to the clearance of cinder.

Drawings

FIG. 1 is a schematic view of a conventional boiler tube with deposited scale;

FIG. 2 is a schematic view of the expanded state of the integrated cleaning device according to the embodiment of the present invention;

fig. 3 is a schematic drawing of a closed state of the integrated cleaning device according to the embodiment of the present invention;

fig. 4 is a schematic view of the integrated cleaning device of the embodiment of the present invention entering the inlet header in a folded state;

FIG. 5 is a schematic view of the comprehensive cleaning device of the embodiment of the present invention in an open state inside the inlet header;

FIG. 6 is a schematic view of the stacked state of the parallelogram mechanism in the integrated cleaning device according to the embodiment of the present invention;

fig. 7 is a schematic view of a retractable nozzle in the integrated cleaning device according to the embodiment of the present invention.

The drawings are shown in the following parts:

1. a pipeline crawler; 11. a frame; 12. a rotating shaft; 13. a rotating electric machine; 14. a crawling wheel;

2. a retractable support mechanism; 21. an inflatable support mechanism; 211. an inflatable body; 212. a flat plate; 213. a second compressed air pipe; 214. an electromagnetic valve; 22. a parallelogram mechanism; 221. parallel connecting rods;

3. a nozzle housing;

4. a retractable nozzle; 401. an air inlet; 402. an air outlet; 41. an inner hoop; 42. a balloon structure; 420. a double-layer rubber wall; 421. a through hole; 422. a balloon air inlet;

5. an endoscope; 51. a signal transmission cable;

6. a first compressed air pipe; 61. a switch;

7. a protective sleeve;

8. an inlet header; 81. an access hole; 82. a lead-out pipe;

9. an outlet header;

A. and (3) oxide scale.

Detailed Description

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The present invention will be further described with reference to the accompanying drawings and examples, and for convenience of description, wherein fig. 4 and 5 are schematic diagrams of an inlet header 8, a manhole 81, an outlet header 9, an outlet pipe 82 and a scale a, and the inlet header 8, the manhole 81, the outlet header 9, the outlet pipe 82 and the scale a to be described do not belong to the components of the following embodiments of the present invention, the inlet header 8 is a tank, and the interior of the tank of the inlet header 8 is arrayed with the pipe holes of the outlet pipe 82, the pipe holes are generally distributed at the bottom of the tank, i.e. at 0 degree position, and at 30 degree position, and the other tanks are arranged at 0 degree, 30 degree and 60 degree; the solid arrows in the drawings are schematic of the direction of compressed air flow; in the embodiments, since the number of components such as pipes is large and the length is long, the drawings are omitted, which is only for illustration and should not be construed as a limitation to the present technical solution.

As shown in the accompanying drawings 2 to 5, the embodiment of the utility model provides a cleaning device is synthesized to boiler pipeline cinder should be synthesized cleaning device and enter into the inside of entry collection case 8 pipeline via the manhole 81 of boiler entry collection case 8 for the cinder A that thermal power factory boiler heating surface pipeline overhauld sweeps the clearance, its characterized in that:

the comprehensive cleaning device comprises a protective sleeve 7 and a pipeline crawler 1 detachably arranged in the protective sleeve 7, wherein the protective sleeve 7 is arranged in a horizontal extending mode approximately, the pipeline crawler 1 is provided with a rack 11, telescopic supporting mechanisms 2 are arranged on two sides of the rack 11, the telescopic supporting mechanisms 2 are positioned in the pipeline in a front-to-back mode by taking the rack 11 as a reference, climbing wheels 14 are connected to the peripheries of the telescopic supporting mechanisms 2, and the climbing wheels 14 are driven by a motor to drive the pipeline crawler 1 to climb forwards and backwards in the pipeline;

a rotating shaft 12 and a rotating motor 13 are mounted on the frame 11, the axis of the rotating shaft 12 is parallel to the axis of the protective sleeve 7, the rotating motor 13 is in transmission connection with the rotating shaft 12, and the rotating motor 13 drives the rotating shaft 12 to rotate;

a nozzle housing 3 is fixed on the rotating shaft 12, a telescopic nozzle 4 is installed in the nozzle housing 3, the telescopic nozzle 4 is provided with an air inlet 401 and an air outlet 402, the aperture of the air inlet 401 is larger than that of the air outlet 402, and the compressed air is promoted to expand the telescopic nozzle 4 and simultaneously contribute to raising the air outlet pressure; the rotary motor 13 drives the rotary shaft 12 to rotate so as to rotate the nozzle housing 3 and the retractable nozzle 4 in the axial direction of the rotary shaft 12;

an endoscope 5 is arranged at one side of the nozzle shell 3 in the machine frame 11;

a first compressed air pipe 6 and a signal transmission cable 51 are arranged inside the protective sleeve 7, and the first compressed air pipe 6 and the signal transmission cable 51 extend along the axial direction of the protective sleeve 7; the first compressed air pipe 6 is communicated with an air inlet 401 of the telescopic nozzle 4 to transmit compressed air and spray the compressed air to an air outlet 402, a switch 61 is arranged on the first compressed air pipe 6, and cleaning and blowing can be controlled by the switch 61; the signal transmission cable 51 is connected to the endoscope 5 for signal transmission.

The above-mentioned comprehensive cleaning device has two states, one is a folded state, the other is an unfolded state, wherein:

in a furled state, referring to fig. 3, the whole set of apparatus is retracted within the protective sheath 7, and the whole set of apparatus enters and exits the access hole 81 of the inlet header 8 along with the protective sheath 7; at this time, the retractable nozzle 4 and the retractable support mechanism 2 are in a retracted state, the size of the retractable nozzle and the retractable support mechanism 2 is smaller than that of the inner wall of the protective sleeve 7, the whole set of device can be folded into the protective sleeve 7 by pulling the first compressed air pipe 6 and the signal transmission cable 51, in order to facilitate pulling, the outer pipe wall of the first compressed air pipe 6 can be provided with a braided reinforcing layer, and the folding of the signal transmission cable 51 and the endoscope 5 can be realized by pulling the signal transmission cable 51;

in an unfolded state, referring to fig. 2, the whole device enters a pipeline inside an inlet header 8, and the telescopic supporting mechanism 2 can be customized according to the inner pipe diameter of the inlet header 8, so that a certain gap is kept between the unfolded size of the telescopic supporting mechanism 2 and the inner wall of the inlet header 8, and the telescopic nozzle 4 is prevented from ejecting the whole device after being unfolded; meanwhile, the signal transmission cable 51 connected with the endoscope 5 in the unfolded state can also control the endoscope 5 to rotate at a certain angle, the endoscope 5 is electrically connected with the signal transmission cable 51 for signal transmission, and the image shot by the endoscope is transmitted to an upper computer or a display device in the form of optical signals or digital signals from the signal transmission cable 51, so that an operator can observe whether the comprehensive cleaning device is in place or not.

The header is a tank body, the access hole 81 of the header is smaller than the aperture of the inner wall of the header, the comprehensive cleaning device enters the inlet header 8 through the access hole of the boiler inlet header 8 on the premise of not destroying the integrity and the air tightness of the tank body, and the comprehensive cleaning device is stable when the nozzle is used for injecting air to prevent the nozzle from separating from a pipeline port, through the implementation of the above embodiment, when the oxide skin A blowing cleaning operation for the pipeline maintenance of the heating surface of the boiler of the thermal power plant is performed, the comprehensive cleaning device can be put into use only by cutting a small number of the access holes 81 of the final superheater header and a very small number of the inlet pipes of the reheater, the operation position when the comprehensive cleaning device is applied is at the inlet header 8, the access hole 81 on the inlet header 8 in the boiler system is positioned on the ceiling of the boiler, the inlet of the reheater is positioned on the platform, which is equivalent to change the welding port position of the operation, the risk of falling in the construction high altitude has been stopped, avoided at every again, cut off on the superheater pipe, the welding crater, avoid again, the life of superheater pipe reduces, improve thermal power factory economic nature, the reliability, it directly blows by synthesizing cleaning device to locate at the inside outlet pipe 82 tube hole of entry header 8, can easily get to be located the light dashing of elbow cinder A of pipeline bottom, and make cinder A pile up in export header tank 9, it is effectual to arrange the clearance of cinder A, high efficiency, the maintenance cost is about 3% of former scheme, a large amount of maintenance expenses have been saved.

In the above embodiment, the retractable nozzle 4 comprises an inner hoop 41 and a balloon structure 42, and referring to fig. 7, the inner hoop 41 is fixed in the nozzle housing 3, and the balloon structure 42 is mounted on the inner hoop 41; the balloon structure 42 is provided with double layers of rubber walls 420, an inflation space is formed between the double layers of rubber walls 420, the lower end of the double layers of rubber walls 420 is closed, the double layers of rubber walls 420 of the balloon structure 42 form an inverted cone with a bottom surface parallel to the cross section, a through hole 421 is formed in the center line of the cone, and a plurality of balloon air inlets 422 are formed above the cone on the double layers of rubber walls 420; the air inlet 401 of the retractable nozzle 4 is positioned above the balloon air inlet 422 and the through hole 421 of the cone, and the air outlet 402 of the retractable nozzle 4 is positioned below the inverted cone. When the first compressed air pipe 6 continuously inputs compressed air, the air continuously enters the balloon inlet 422 and the through hole 421, and the air entering the balloon inlet 422 stretches and expands the balloon structure 42 with the double-layer rubber wall 420 towards the inverted small opening of the cone, so that the double-layer rubber wall 420 extends to the pipe hole of the outlet pipe 82 of the header after expanding. The double-layer rubber wall 420 is made of natural rubber, ethylene propylene diene monomer, chloroprene rubber or reclaimed rubber, so that the double-layer rubber wall 420 has good tensile rate, and the air tightness is ensured when the double-layer rubber wall 420 expands and extends to the pipe orifice of the outlet pipe 82 of the inlet header 8. Meanwhile, due to the selection of the materials of the balloon air inlet 422, the through hole 421 and the double-layer rubber wall 420, the double-layer rubber wall 420 can be blown large when the air inlet 401 is used for air inlet, so that the double-layer rubber wall is not blown to be broken. In the collapsed state of the kit, the retractable nozzle 4 is not connected to compressed air, and the double rubber wall 420 of the balloon structure 42 collapses and retracts itself into the nozzle housing 3.

In the above-mentioned embodiment, the telescopic supporting mechanism 2 may be an inflatable supporting mechanism 21 or a stack of several parallelogram mechanisms 22, wherein:

when the inflatable support means 21 is used, referring to fig. 2, the telescopic support means 2 may use the inflatable support means 21, the inflatable supporting mechanism 21 comprises an inflatable body 211, flat plates 212 for fixing the crawling wheel 14 are arranged on the upper and lower surfaces of the inflatable body 211, the inflatable body 211 is connected with a second compressed air pipe 213, the second compressed air pipe 213 is communicated with the first compressed air pipe 6, an electromagnetic valve 214 is provided in the second compressed air pipe 213, and when the integrated cleaning apparatus is placed inside the pipe of the inlet header 8, the electromagnetic valve 214 on the second compressed air pipe 213 is opened, the first compressed air pipe 6 inflates the inflatable body 211 through the second compressed air pipe 213, after the inflatable body 211 is inflated to a certain degree, the size of the inflatable supporting mechanism 21 and the inner wall of the inlet header 8 keep a certain clearance, and the comprehensive cleaning device can move back and forth in the inlet header 8 by virtue of the crawling wheel 14; meanwhile, the inflatable body 211 of the inflatable supporting mechanism 21 can also be made of natural rubber, ethylene propylene diene monomer, chloroprene rubber or reclaimed rubber;

when the parallelogram mechanism 22 is adopted, a plurality of parallelogram mechanisms 22 are overlapped to form the telescopic supporting mechanism 2, the parallelogram mechanisms 22 comprise parallel connecting rods 221, and the crawling wheels 14 are arranged at the end parts of the parallel connecting rods 221 positioned at the top and the bottom; a plurality of parallelogram mechanisms 22 are overlapped to form the telescopic supporting mechanism 2, and reference is made to the attached figure 6; since the principle and operation of the parallelogram mechanism 22 are conventional in the art, they will not be described in detail.

It should be noted that, connection relation, control, and the like between the power supply and devices such as the electromagnetic valve, the rotating motor, and the motor for driving the crawling wheel are all related to the prior art, and therefore, are not described in detail herein.

Taking the inflatable supporting mechanism 21 as an example, the implementation process of the embodiment of the present invention can refer to the following steps:

1. the whole set of device is wrapped by a protective sleeve 7 and put into an inlet header 8, referring to the attached figure 4, and the comprehensive cleaning device enters the inside of a pipeline of the inlet header 8 through a manhole 81 of the boiler inlet header 8;

2. turning on the compressed air, opening the solenoid valve 214 in the second compressed air line 213 to bring the kit into proper engagement with the inlet header 8, and turning off the compressed air and the solenoid valve 214 in the second compressed air line 213 to maintain the inflatable support structure 21 in this condition;

3. with the endoscope 5, the crawl wheel 14 of the adjusting device advances and retreats, and the air outlet 402 of the telescopic nozzle 4 is aligned with the pipe hole of the inlet header 8 leading out of the pipe 82 at the 0-degree position;

4. compressed air is communicated, the telescopic nozzle 4 is expanded downwards, the lower part of the telescopic nozzle 4 is expanded and then is tightly matched with a pipe hole of an outlet pipe 82 of an inlet header 8, the compressed air is prevented from leaking, oxide skin A at the bottom elbow of the outlet pipe 82 is flushed out and accumulated in an outlet header 9, at the moment, the pressure of the compressed air can adopt 0.4 MPa, one end of the outlet pipe 82 is closed, the compressed air can quickly flush the oxide skin A from the bottom elbow of the outlet pipe 82 onto the outlet header 9, the oxide skin A on the outlet header 9 can be cleaned, and the state can refer to the attached drawing 5;

5. after cleaning the oxide skin A of the elbow at the bottom of one eduction tube 82, the compressed air is closed, the eduction tube 82 at the front and rear positions can be selected after the telescopic nozzle 4 is contracted, and the crawling wheel 14 is controlled to move forwards and backwards; or the outlet pipe 82 in the circumferential direction is cleaned by circumferentially rotating 30 degrees or 60 degrees, and the rotating shaft 12 is driven to rotate by the rotating motor 13 so as to enable the nozzle shell 3 and the telescopic nozzle 4 to circumferentially rotate;

6. and (5) repeating the steps (3), (4) and (5) to finish the cleaning operation of the oxide skin A of the bottom elbows of all the pipelines of the boiler.

With respect to the above embodiments, the changes that may be made by the present invention are described as follows:

1. the double-layer rubber wall 420 and the inflatable body 211 of the inflatable supporting mechanism 21 can be made of natural rubber, ethylene propylene diene monomer, chloroprene rubber or regenerated rubber materials, which have good stretching rate for inflating to extend the related structure and certain wear resistance and durability, and other materials with similar performance can be regarded as equivalent alternatives;

2. in the above embodiment, the retractable supporting mechanism 2 may be an inflatable supporting mechanism 21 or a stack of a plurality of parallelogram mechanisms 22, but the present invention is not limited thereto, and may be other structures that can support the device in the unfolding state.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (6)

1. The utility model provides a cleaning device is synthesized to boiler pipeline cinder, should synthesize cleaning device and enter into the inside of entry collection case (8) pipeline via access hole (81) of boiler entry collection case (8) for the cinder that thermal power factory boiler heating surface pipeline overhauld sweeps the clearance, its characterized in that:

the comprehensive cleaning device comprises a protective sleeve (7) and a pipeline crawler (1) detachably arranged in the protective sleeve (7), the pipeline crawler (1) is provided with a rack (11), two sides of the rack (11) are provided with telescopic supporting mechanisms (2), the periphery of each telescopic supporting mechanism (2) is connected with a crawling wheel (14), and the crawling wheels (14) are driven by a motor to drive the pipeline crawler (1) to crawl forwards and backwards in a pipeline;

a rotating shaft (12) and a rotating motor (13) are mounted on the rack (11), the rotating motor (13) is located on one side of the rotating shaft (12), the axis of the rotating shaft (12) is parallel to the axis of the protective sleeve (7), and the rotating motor (13) is in transmission connection with the rotating shaft (12);

a nozzle shell (3) is fixed on the rotating shaft (12), a telescopic nozzle (4) is installed in the nozzle shell (3), an air inlet (401) and an air outlet (402) are formed in the telescopic nozzle (4), and the aperture of the air inlet (401) is larger than that of the air outlet (402); the rotating motor (13) drives the rotating shaft (12) to rotate so as to enable the nozzle shell (3) and the telescopic nozzle (4) to rotate in the circumferential direction;

an endoscope (5) is arranged on one side of the nozzle shell (3) in the machine frame (11);

a first compressed air pipe (6) and a signal transmission cable (51) are arranged inside the protective sleeve (7), and the first compressed air pipe (6) and the signal transmission cable (51) extend along the axial direction of the protective sleeve (7); the first compressed air pipe (6) is communicated with an air inlet (401) of the telescopic nozzle (4) for compressed air transmission, and compressed air is sprayed out from an air outlet (402); the signal transmission cable (51) is connected to the endoscope (5) for signal transmission.

2. The integrated cleaning apparatus of claim 1, wherein: the telescopic nozzle (4) comprises an inner hoop (41) and an air balloon structure (42), the inner hoop (41) is fixed in the nozzle shell (3), and the air balloon structure (42) is installed on the inner hoop (41); the balloon structure (42) is provided with double layers of rubber walls (420), and an inflation space is formed between the double layers of rubber walls (420); the double-layer rubber wall (420) of the balloon structure (42) forms an inverted cone with a parallel section at the bottom surface, a through hole (421) is arranged at the center line of the cone, and a plurality of balloon air inlets (422) are arranged above the cone on the double-layer rubber wall (420); the air inlet (401) of the telescopic nozzle (4) is positioned above the balloon air inlet (422) and the through hole (421) of the cone, and the air outlet (402) of the telescopic nozzle (4) is positioned below the inverted cone.

3. The integrated cleaning apparatus of claim 1, wherein: the telescopic supporting mechanism (2) is an inflatable supporting mechanism (21), the inflatable supporting mechanism (21) comprises an inflatable body (211), flat plates (212) used for fixing the crawling wheel (14) are arranged on the upper surface and the lower surface of the inflatable body (211), the inflatable body (211) is connected with a second compressed air pipe (213), the second compressed air pipe (213) is communicated with the first compressed air pipe (6), and an electromagnetic valve (214) is arranged on the second compressed air pipe (213).

4. The integrated cleaning apparatus of claim 1, wherein: the telescopic supporting mechanism (2) is formed by overlapping a plurality of parallelogram mechanisms (22).

5. The integrated cleaning apparatus of claim 4, wherein: the parallelogram mechanism (22) comprises parallel connecting rods (221), and the crawling wheels (14) are arranged at the ends of the parallel connecting rods (221) positioned at the top and the bottom.

6. The integrated cleaning apparatus of claim 1, wherein: a switch (61) is arranged on the first compressed air pipe (6).

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