An online corrosion measurement system for chemical cleaning of electrode boiler tubes

Abstract

The present invention discloses an online corrosion measurement system for chemical cleaning of electrode boiler tubes, comprising an upper connecting tube rotatably mounted on a mounting seat, a driving mechanism for driving the upper connecting tube to rotate is installed between the upper connecting tube and the mounting seat, and a serpentine guide tube, a lower connecting tube, an elastic inner wall scraping mechanism, an elastic sealing capsule and a corrosion detection probe are installed in sequence vertically downward at the lower end of the upper connecting tube, and the elastic inner wall scraping mechanism and the elastic sealing capsule are both connected to a medium supply pipe system. The present invention can perform targeted cleaning on different positions of the inner wall of the furnace tube, improve the dirt removal effect, and accurately detect the corrosion condition of the inner wall of the furnace tube at the same time, and perform subsequent targeted maintenance work based on the detected condition. The present invention is applicable to the technical field of furnace tube maintenance of electrode boilers.

Description

Technical Field

[0001] The invention belongs to the technical field of electrode boiler maintenance, and in particular relates to an online corrosion measurement system for chemical cleaning of electrode boiler tubes. Background Art

[0002] An electrode boiler is a kind of boiler that heats water through electrodes to make it evaporate and form hot steam, and then uses hot steam to heat and disinfect. During long-term use, impurities, alkaline substances, etc. in the boiler water cause scaling in the furnace tube of the electrode boiler. When heating the boiler water, the thermal effect of the electrode boiler decreases due to uneven heating of the boiler water, and in severe cases, the furnace tube will rupture, and the furnace tube needs to be repaired or replaced in time. Therefore, it is necessary to regularly chemically clean the furnace tube to remove the stubborn dirt on the inner wall of the furnace tube to ensure the thermal effect of the furnace tube. However, the furnace tube will be corroded during long-term use, and the chemical agents will corrode it more or less during the chemical cleaning process. Therefore, a device for removing dirt in the furnace tube is needed to perform targeted cleaning on different positions of the inner wall of the furnace tube, improve the dirt removal effect, and accurately detect the corrosion of the inner wall of the furnace tube, and perform subsequent targeted maintenance work based on the detected situation. Summary of the invention

[0003] The present invention provides an online corrosion measurement system for chemical cleaning of electrode boiler tubes, which is used for targeted cleaning of different positions of the inner wall of the furnace tube, improving the dirt removal effect, and accurately detecting the corrosion condition of the inner wall of the furnace tube, and performing subsequent targeted maintenance work according to the detected condition.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An online corrosion measurement system for chemical cleaning of electrode boiler tubes comprises an upper connecting tube rotatably mounted on a mounting seat, a driving mechanism for driving the upper connecting tube to rotate is arranged between the upper connecting tube and the mounting seat, a serpentine guide tube, a lower connecting tube, an elastic inner wall scraping mechanism, an elastic sealing capsule and a corrosion detection probe are arranged in sequence vertically downward at the lower end of the upper connecting tube, and the elastic inner wall scraping mechanism and the elastic sealing capsule are both connected to a medium supply pipe system.

[0006] Furthermore, the driving mechanism includes an assembly shell installed on the mounting seat, a driving motor is installed in the assembly shell, a first pulley is coaxially mounted on the output shaft of the driving motor, and a second pulley is coaxially mounted outside the upper connecting tube, and the first pulley and the second pulley are connected via a transmission belt.

[0007] Furthermore, the medium supply pipe system includes a liquid-conducting metal hose installed in a snake-shaped catheter and extending along its shape, the lower end of the liquid-conducting metal hose is connected to an elastic inner wall scraping mechanism, and the lower end of the elastic inner wall scraping mechanism is connected to an elastic sealing bag via a telescopic tube rotatably connected thereto, the upper end of the liquid-conducting metal hose extends out of an upper connecting tube, an adapter sleeve is rotatably connected to the upper part of the liquid-conducting metal hose, a plurality of conducting holes are opened on the liquid-conducting metal hose and at a position located inside the adapter sleeve, and a transfer tube is constructed on the adapter sleeve.

[0008] Furthermore, the corrosion detection probe includes a probe body arranged below the elastic sealing capsule, the upper end of the probe body is connected to a wire, and the wire passes through the elastic sealing capsule, the telescopic tube, the elastic inner wall scraping mechanism, the lower connecting tube and the liquid-conducting metal hose in sequence, and a plug connector is installed at the upper end of the wire.

[0009] Furthermore, the telescopic tube includes a plurality of tube bodies which are sequentially plugged in vertically, the tube body at the top is rotatably connected to the lower end of the elastic inner wall scraping mechanism, and the elastic sealing bag is coaxially assembled outside the tube body at the bottom and is in conduction with it.

[0010] Furthermore, the elastic inner wall scraping mechanism includes a plurality of outward-stretched scraping units which are movably connected in sequence along the vertical direction, an assembly cavity is formed in each outward-stretched scraping unit, a vertical hard spring is arranged in the assembly cavity, and two ends of the vertical hard spring are respectively connected to the uppermost outward-stretched scraping unit and the lowermost outward-stretched scraping unit, and the medium supply pipe system is connected to each assembly cavity.

[0011] Furthermore, the outward-expanding scraping unit includes a cylindrical assembly having an active cavity, an active tube whose outer circumferential wall has a regular polygonal cross-section coaxially connected to the upper end of the cylindrical assembly, a flange extending radially outward is constructed at the upper end of the active tube, the active tubes in adjacent cylindrical assemblies are movably inserted into the active cavity of the corresponding cylindrical assembly, the assembly cavity is formed between the active cavity and the inner cavity of the active tube, a plurality of scraping components are elastically and evenly connected to the circumference of the cylindrical assembly, each of the scraping components extends radially outward along the cylindrical assembly and is connected to the assembly cavity.

[0012] Furthermore, a plurality of assembly arms are evenly constructed on the circumferential surface of the cylindrical assembly along its circumference, and each of the assembly arms extends radially outward along the cylindrical assembly; the scraping assembly includes a connecting arm at one end extending into the cylindrical assembly through the corresponding assembly arm, and a scraping member is detachably connected to the other end of the connecting arm, and the portion where the connecting arm and the assembly arm are inserted into each other is connected by a first connecting spring, and the first connecting spring extends radially along the cylindrical assembly.

[0013] Furthermore, the scraper member includes an integrally formed connecting portion and a circumferential scraper portion, and axial scraper portions are respectively formed at the upper and lower ends of the scraper member. At least one liquid guide channel is opened in the connecting arm, and the liquid guide channel extends radially along the cylindrical assembly and is connected to the outside through the scraper member, and the liquid guide channel is connected to the assembly cavity. A first nozzle or a second nozzle is installed on the connecting portion and at the end of the liquid guide channel.

[0014] Furthermore, a conical mounting groove is provided on the connecting portion and at the end of the liquid guiding channel, and the conical mounting groove is connected to the liquid guiding channel through an assembly groove; the second nozzle is assembled in the conical mounting groove and connected to the connecting portion via a second connecting spring installed in the assembly groove.

[0015] Due to the adoption of the above structure, the technical progress achieved by the present invention compared with the prior art is that: the present invention adjusts the snake-like conduit to lower different positions in the furnace tube, so that the corrosion detection probe can detect the corrosion conditions at different positions of the inner wall of the furnace tube. When cleaning a certain depth area of ​​the inner wall of the furnace tube, the lower end of the snake-like conduit is lowered to below the target area; then, by continuously supplying gas of a predetermined pressure to the elastic sealing capsule through the medium supply pipe system, the elastic sealing capsule gradually expands and expands on the inner wall of the furnace tube to seal the lower end of the target area of ​​the furnace tube. At the same time, the elastic inner wall scraping mechanism is also elastically expanded on the inner wall of the furnace tube, and the elastic inner wall scraping mechanism is expanded on the inner wall of the furnace tube before the elastic sealing capsule, that is, the pressure required to expand the furnace tube is lower than that of the elastic sealing capsule; under the positioning and restriction of the elastic inner wall scraping mechanism, it is extremely difficult for the elastic sealing capsule and the inner wall of the furnace tube to have relative displacement; then, a predetermined amount of cleaning liquid is directly supplied to the inner wall of the furnace tube. The cleaning liquid in the furnace tube is then added into the furnace tube so that the cleaning liquid in the furnace tube can immerse the target area; during the soaking process, the gas continuously discharged from the elastic inner wall scraping mechanism enters the cleaning liquid in the furnace tube to generate bubbles. During the rising process of the bubbles, the bubbles burst and generate energy, which acts on the dirt, thereby accelerating the efficiency of dirt detachment; after soaking for a period of time, most of the dirt on the inner wall of the furnace tube is detached, and the remaining stubborn dirt cannot be removed in a short time by the chemical soaking method. At this time, the gas supply to the medium supply pipe system is stopped, and the gas in the elastic sealing bag is discharged, so that the elastic sealing bag is detached from the inner wall of the furnace tube, so that the cleaning liquid in the furnace tube is gradually discharged; then, a certain pressure of cleaning liquid or Clean water is introduced into the medium supply pipe system. Under the pressure, the elastic sealing bag expands and approaches or slightly contacts the inner wall of the furnace tube. At the same time, the elastic inner wall scraping mechanism abuts against the inner wall of the furnace tube before the elastic sealing bag, and a part of the cleaning liquid or clean water is ejected onto the inner wall of the furnace tube by the elastic inner wall scraping mechanism; then the driving mechanism is controlled to drive the elastic inner wall scraping mechanism to rotate 1-3 times forward and the corresponding number of times reversely through the upper connecting pipe and the snake-shaped conduit, and repeat multiple times; at the same time, it can ensure that the cleaning liquid or clean water is higher than the predetermined pressure, and then the cleaning liquid or clean water is introduced into the medium supply pipe system in a pulse wave manner, driving the elastic inner wall scraping mechanism to expand and contract vertically, thereby realizing the elastic inner wall scraping. While the scraping mechanism rotates along the axis of the furnace tube, the elastic inner wall scraping mechanism telescopes along the axis of the furnace tube, thereby realizing circumferential rotary scraping and axial straight scraping of the inner wall of the furnace tube, thereby ensuring that the dirt on the tube wall is fully removed; synchronously, part of the cleaning liquid or clean water is ejected from the elastic inner wall scraping mechanism to flush the tube wall portion to be scraped; during the process of scraping the inner wall of the furnace tube, the present invention can drive the serpentine-shaped conduit to drive the elastic inner wall scraping mechanism to move along the extension direction of the furnace tube, thereby allowing the elastic sealing bag to further clean the tube wall after cleaning, and since the elastic sealing bag is made of elastic rubber, its peripheral wall can be deformed into the corroded portion, thereby achieving the purpose of cleaning the dirt in the corroded portion.In order to increase the life of the outer wall of the elastic sealing bag, a wear-resistant layer is provided on the outer wall of the elastic sealing bag. In summary, the present invention can perform targeted cleaning on different positions of the inner wall of the furnace tube, improve the dirt removal effect, and accurately detect the corrosion of the inner wall of the furnace tube, and perform subsequent targeted maintenance work based on the detected situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the connection of the mounting base, the driving mechanism, the lower connecting pipe and the local medium supply pipe system according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 a cross-sectional view of the structure shown;

[0021] Figure 4 It is a cross-sectional view of the structure of the connection between the elastic inner wall scraping mechanism, the elastic sealing bag and the corrosion detection probe according to the embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of an outward-stretching scraping unit in an elastic inner wall scraping mechanism according to an embodiment of the present invention;

[0023] Figure 6 It is a top view of the structure of the outward-stretched scraping unit in the elastic inner wall scraping mechanism according to an embodiment of the present invention;

[0024] Figure 7 It is a partial structural cross-sectional view of an outward-stretched scraping unit in the elastic inner wall scraping mechanism according to an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the scraping member and the connecting arm after being separated in the outward-extended scraping unit according to an embodiment of the present invention;

[0026] Fig. 9 It is a structural cross-sectional view of the connection between the assembly arm, the connecting arm and the scraping member equipped with the second nozzle in the outward-expanding scraping unit according to an embodiment of the present invention.

[0027] Labeled parts: 100-snake-shaped catheter, 200-upper connecting tube, 201-tubular body, 202-first tube cavity, 203-tubular joint, 300-mounting seat, 301-disc-shaped seat body, 302-handle bar, 400-elastic inner wall scraping mechanism, 401-cylindrical assembly, 402-movable tube, 403-movable cavity, 404-assembly cavity, 405-assembly arm, 406-connecting arm, 407-liquid guide channel, 408-first connecting spring, 409-connecting part, 410-circumferential scraping part, 411-limiting protrusion, 412-plug tube, 413-plug hole, 414-fixing hole, 4 15-first nozzle, 416-assembly groove, 417-second nozzle, 418-second connecting spring, 500-elastic sealing bag, 600-corrosion detection probe, 601-probe body, 602-lead, 603-plug connector, 700-medium supply pipe system, 701-liquid-conducting metal hose, 702-second tube cavity, 703-adapter sleeve, 704-adapter tube, 800-driving mechanism, 801-assembly shell, 802-driving motor, 803-first pulley, 804-second pulley, 805-transmission belt, 900-lower connecting pipe, 1000-vertical hard spring, 1100-telescopic tube. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] The present invention discloses an online corrosion measurement system for chemical cleaning of electrode boiler tubes. Figure 1-9As shown, it includes an upper connecting pipe 200, a serpentine conduit 100, a lower connecting pipe 900, an elastic inner wall scraping mechanism 400, an elastic sealing capsule 500, a corrosion detection probe 600, a driving mechanism 800 and a medium supply pipe system 700. Among them, the upper connecting pipe 200 is rotatably mounted on the mounting seat 300, and the driving mechanism 800 is assembled between the upper connecting pipe 200 and the mounting seat 300. The driving mechanism 800 is used to drive the upper connecting pipe 200 to rotate. The upper connecting pipe 200, the serpentine conduit 100, the lower connecting pipe 900, the elastic inner wall scraping mechanism 400, the elastic sealing capsule 500 and the corrosion detection probe 600 are sequentially connected downward in the vertical direction, and the elastic inner wall scraping mechanism 400 and the elastic sealing capsule 500 are both connected to the medium supply pipe system 700. The working principle and advantage of the present invention are: the present invention adjusts the serpentine conduit 100 to lower different positions in the furnace pipe, so that the corrosion detection probe 600 detects the corrosion conditions of different positions on the inner wall of the furnace pipe.When cleaning a certain depth area of ​​the inner wall of the furnace tube, the lower end of the serpentine conduit 100 is lowered to below the target area; thereafter, by continuously supplying gas of a predetermined pressure to the elastic sealing bag 500 through the medium supply pipe system 700, the elastic sealing bag 500 gradually expands and expands on the inner wall of the furnace tube to seal the lower end of the target area of ​​the furnace tube. At the same time, the elastic inner wall scraping mechanism 400 is also elastically expanded on the inner wall of the furnace tube, and the elastic inner wall scraping mechanism 400 is expanded on the inner wall of the furnace tube before the elastic sealing bag 500, that is, the pressure required to expand the furnace tube is lower than that of the elastic sealing bag 500; under the positioning and restriction of the elastic inner wall scraping mechanism 400, it is extremely difficult for the elastic sealing bag 500 and the inner wall of the furnace tube to have relative displacement; then, the predetermined A large amount of cleaning liquid is directly added into the furnace tube, so that the cleaning liquid in the furnace tube can immerse the target area; during the soaking process, the gas continuously discharged from the elastic inner wall scraping mechanism 400 enters the cleaning liquid in the furnace tube, generating bubbles, and in the process of the bubbles rising, the bubbles burst and generate energy, which acts on the dirt, thereby accelerating the efficiency of dirt detachment; after soaking for a period of time, most of the dirt on the inner wall of the furnace tube is detached, and the remaining stubborn dirt cannot be removed in a short time by the chemical soaking method. At this time, stop supplying gas to the medium supply pipe system 700, and discharge the gas in the elastic sealing bag 500, so that the elastic sealing bag 500 is detached from the inner wall of the furnace tube, so that the cleaning liquid in the furnace tube is gradually discharged; then, a certain pressure of cleaning liquid or clean water is passed into the medium Supply pipe system 700, under this pressure, the elastic sealing bag 500 expands and approaches or slightly contacts the inner wall of the furnace tube, and at the same time, the elastic inner wall scraping mechanism 400 is against the inner wall of the furnace tube before the elastic sealing bag 500, and a part of the cleaning liquid or clean water is ejected to the inner wall of the furnace tube by the elastic inner wall scraping mechanism 400; then control the driving mechanism 800 to operate, so that it drives the elastic inner wall scraping mechanism 400 to rotate 1-3 times forward and the corresponding number of times in the reverse direction through the upper connecting pipe 200 and the snake-shaped conduit 100, and repeats multiple times; at the same time, it can ensure that the cleaning liquid or clean water is higher than the predetermined pressure, and then the cleaning liquid or clean water is introduced into the medium supply pipe system 700 in a pulse wave manner, so as to drive the elastic inner wall scraping mechanism 400 to expand and contract vertically, thereby realizing the elastic While the inner wall scraping mechanism 400 rotates along the axis of the furnace tube, the elastic inner wall scraping mechanism 400 telescopes along the axis of the furnace tube to achieve circumferential rotary scraping and axial straight scraping of the inner wall of the furnace tube, ensuring that the dirt on the tube wall is fully removed; synchronously, part of the cleaning liquid or clean water is ejected from the elastic inner wall scraping mechanism 400 to flush the scraped tube wall portion; during the process of scraping the inner wall of the furnace tube, the present invention can drive the serpentine guide tube 100 to drive the elastic inner wall scraping mechanism 400 to move along the extension direction of the furnace tube, so that the elastic sealing bag 500 further cleans the tube wall after cleaning, and because the elastic sealing bag 500 is made of elastic rubber, its outer peripheral wall can be deformed into the corroded portion, thereby achieving the purpose of cleaning the dirt in the corroded portion.In order to increase the life of the outer wall of the elastic sealing bag 500, a wear-resistant layer is provided on the outer wall of the elastic sealing bag 500. In summary, the present invention can perform targeted cleaning on different positions of the inner wall of the furnace tube, improve the dirt removal effect, and accurately detect the corrosion of the inner wall of the furnace tube, and perform subsequent targeted maintenance work based on the detected situation.

[0030] As a preferred embodiment of the present invention, Figure 2-4As shown, the mounting seat 300 includes a disc-shaped seat body 301, on which a handle bar 302 is constructed for the convenience of the operator to hold. The upper connecting pipe 200 of this embodiment includes a tubular body 201, the inner cavity of the tubular body 201 is a first tubular cavity 202, and a tubular joint 203 is constructed at the upper end of the tubular body 201 to coincide with its axis. The driving mechanism 800 of the present embodiment comprises an assembly shell 801, a driving motor 802, a first pulley 803, a second pulley 804 and a transmission belt 805, wherein the assembly shell 801 is detachably mounted on the mounting seat 300, the driving motor 802 is mounted in the assembly shell 801, the first pulley 803 is coaxially mounted on the output shaft of the driving motor 802, the second pulley 804 is coaxially mounted outside the tubular joint 203 of the upper connecting tube 200, and the first pulley 803 and the second pulley 804 are connected by transmission through the transmission belt 805; by controlling the action of the driving motor 802, the upper connecting tube 200 is driven to rotate through the transmission of the first pulley 803, the second pulley 804 and the transmission belt 805, and during the rotation of the upper connecting tube 200, the elastic inner wall scraping mechanism 400 is driven to rotate through the serpentine guide tube 100 to complete the operation of scraping the furnace tube wall. The medium supply pipe system 700 of this embodiment includes a liquid-conducting metal hose 701, an adapter sleeve 703 and an adapter tube 704. The liquid-conducting metal hose 701 is assembled in the snake-shaped catheter 100, and the liquid-conducting metal hose 701 extends along with the extension of the snake-shaped catheter 100. The inner cavity of the liquid-conducting metal hose 701 is the second lumen 702, and the lower end of the liquid-conducting metal hose 701 is connected to the elastic inner wall scraping mechanism 400. The lower end of the elastic inner wall scraping mechanism 400 of this embodiment is rotatably connected to a telescopic tube 1100, and the telescopic tube 1100 is connected to the elastic sealing capsule 500, and the telescopic tube 1100 connects the elastic inner wall scraping mechanism 400 with the elastic sealing capsule 500. The upper end of the liquid-conducting metal hose 701 extends out from the upper end of the tubular joint 203 through the first tube cavity 202 of the upper connecting tube 200. The upper part of the liquid-conducting metal hose 701 is a hard tube. The adapter sleeve 703 is rotatably mounted on the hard tube part of the liquid-conducting metal hose 701. A plurality of conducting holes are provided on the liquid-conducting metal hose 701 and in a part located inside the adapter sleeve 703. The adapter tube 704 is constructed on the adapter sleeve 703, and the adapter tube 704 is connected to the assembly shell 801 through a fixing seat. The corrosion detection probe 600 of this embodiment includes a probe body 601, which is arranged below the elastic sealing capsule 500. The upper end of the probe body 601 is connected to the wire 602. The wire 602 passes through the elastic sealing capsule 500, the telescopic tube 1100, the elastic inner wall scraping mechanism 400, the lower connecting tube 900 and the second tube cavity 702 of the liquid-conducting metal hose 701 in sequence, and a plug connector 603 is installed at the upper end of the wire 602.The snake-shaped conduit 100 of this embodiment can be inserted into a straight furnace tube or a curved furnace tube, so as to achieve the purpose of detecting and cleaning furnace tubes of different tube types. The telescopic tube 1100 of this embodiment includes a plurality of tube bodies which are plugged in vertically in sequence, the tube body at the top is rotatably connected with the lower end of the elastic inner wall scraping mechanism 400, the elastic sealing capsule 500 is coaxially assembled outside the tube body at the bottom, and the elastic sealing capsule 500 is connected with the inner cavity of the tube body. The medium (pressure gas, cleaning liquid or clean water) of this embodiment enters into the liquid-conducting metal hose 701 through the adapter tube 704 and the adapter sleeve 703, and then enters into the elastic inner wall scraping mechanism 400 and the elastic sealing capsule 500 respectively through the liquid-conducting metal hose 701, thereby achieving the purpose of expanding the elastic sealing capsule 500 and driving the elastic inner wall scraping mechanism 400 to expand outward and contact with the inner wall of the furnace tube. Moreover, since the telescopic tube 1100 is used to connect the elastic inner wall scraping mechanism 400 and the elastic sealing bag 500, the elastic sealing bag 500 can maintain a non-rotating state when the elastic inner wall scraping mechanism 400 is driven to rotate; and when the elastic inner wall scraping mechanism 400 is extended and retracted along the axial direction of the furnace tube, the telescopic tube 1100 also retracts and retracts accordingly.

[0031] As a preferred embodiment of the present invention, Figure 4-7As shown, the elastic inner wall scraping mechanism 400 includes a plurality of outward-stretched scraping units, which are movably connected together in sequence along the vertical direction, and an assembly cavity 404 is formed in each outward-stretched scraping unit. A vertical hard spring 1000 passes through the assembly cavity 404 of each outward-stretched scraping unit, and both ends of the vertical hard spring 1000 are respectively located at the uppermost outward-stretched scraping unit and the lowermost outward-stretched scraping unit, and the lower end of the liquid-conducting metal hose 701 in the medium supply pipe system 700 is connected to the assembly cavity 404 of the uppermost outward-stretched scraping unit. When the pressure of the medium entering the elastic inner wall scraping mechanism 400 increases, the medium drives the outward-stretched scraping units at the upper and lower ends to move away from each other. During the process of the two moving away from each other, the outward-stretched scraping units located between the two are gradually pulled apart, thereby achieving the purpose of these outward-stretched scraping units moving along the axial direction of the furnace tube. During this process, the vertical hard spring 1000 is gradually stretched to store energy; when the medium pressure decreases, the outward-stretched scraping units at both ends are moved closer to each other under the action of the vertical hard spring 1000. During the process of the two moving closer to each other, the distance between the outward-stretched scraping units located between the two is reduced. The vertical hard spring 1000 of this embodiment can also be connected to each external scraping unit, that is, the vertical hard spring 1000 is located in the corresponding assembly cavity 404 and is fixed to the corresponding external scraping unit at one or more points by welding. In this way, when the medium pressure changes, the distance between these external scraping units changes synchronously and evenly. Compared with the vertical hard spring 1000 that only connects the two external scraping units at the end, the effect of elastically driving all the external scraping units is better.

[0032] As a preferred embodiment of the present invention, Figure 5-7As shown, the outward-expanding scraping unit includes a cylindrical assembly 401 and a plurality of scraping components. The cylindrical assembly 401 has an active cavity 403, and a movable tube 402 is coaxially connected to the upper end of the cylindrical assembly 401. The cross-section of the outer peripheral wall of the movable tube 402 is a regular polygon. A flange is constructed at the upper end of the movable tube 402, and the flange extends radially outwardly along the movable tube 402. The movable tubes 402 in two adjacent cylindrical assemblies 401 are movably inserted into the active cavity 403 of the corresponding cylindrical assembly 401, and the inner cavity of the active cavity 403 and the movable tube 402 together form the above-mentioned assembly cavity 404. The above-mentioned multiple scraping components are elastically connected to the cylindrical assembly 401 uniformly along the circumference of the cylindrical assembly 401, and each scraping component extends radially outwardly along the cylindrical assembly 401, and each scraping component is respectively connected to the assembly cavity 404 and the inner cavity of the furnace tube. Specifically, in this embodiment, a plurality of assembly arms 405 are constructed on the circumferential surface of the cylindrical assembly 401. These assembly arms 405 are evenly arranged along the circumference of the cylindrical assembly 401, and each assembly arm 405 extends radially outwardly of the cylindrical assembly 401. The scraping assembly includes a connecting arm 406, a first connecting spring 408, and a scraping member. One end of the connecting arm 406 is movably extended into the cylindrical assembly 401 through the corresponding assembly arm 405, and the scraping member is detachably connected to the other end of the connecting arm 406. The first connecting spring 408 is arranged at the position where the connecting arm 406 and the assembly arm 405 are inserted into each other, and the two ends of the first connecting spring 408 are respectively connected to the connecting arm 406 and the assembly arm 405, and the first connecting spring 408 extends radially of the cylindrical assembly 401. In this embodiment, when there are two connecting arms 406, the two connecting arms 406 extend into one end of the assembly arm 405 and are connected together, so that the two connecting arms 406 form an inverted U-shaped structure, and one end of the first connecting spring 408 is connected to the connection between the two.

[0033] As a preferred embodiment of the present invention, Figure 8As shown, the scraper includes an integrally formed connection portion 409 and a circumferential scraper portion 410, and axial scrapers are formed at the upper and lower ends of the scraper. A plug tube 412 and a limiting protrusion 411 are constructed on the side surface of the connection portion 409 close to the connection arm 406, and a plug hole 413 is constructed at the end of the connection arm 406. The plug tube 412 is inserted into the plug hole 413. A fixing hole 414 is opened on the side surface of the connection arm 406. The fastening bolt is threadedly connected in the fixing hole 414, and the end of the fastening bolt is locked on the plug tube 412. When the number of the connection arms 406 is two, the limiting protrusion 411 is set at a position between the ends of the two connection arms 406. When the first connection spring 408 drives the connection arm 406 back to the initial position, the end of the limiting protrusion 411 abuts against the end surface of the assembly arm 405. This embodiment can adapt to the inspection and dirt cleaning of furnace tubes with different diameters. By adjusting the pressure of the medium, the length of the connecting arm 406 extending from the assembly arm 405 changes. In addition, when the connecting arm 406 rotates with the cylindrical assembly 401, the circumferential scraping portion 410 of the scraping member scrapes the inner wall of the furnace tube; when the cylindrical assembly 401 moves along the axial direction of the furnace tube, the axial scraping portion of the scraping member scrapes the inner wall of the furnace tube axially. In this embodiment, at least one liquid conducting channel 407 is opened in the connecting arm 406. The liquid conducting channel 407 extends radially along the cylindrical assembly 401, and is connected to the outside through a scraper. The liquid conducting channel 407 is also connected to the assembly cavity 404. A first nozzle 415 or a second nozzle 417 is installed on the connecting portion 409 and at the end of the liquid conducting channel 407. When the circumferential scraping portion 410 and the axial scraping portion are in contact with the inner wall of the furnace tube, the connecting portion 409 is at a distance from the inner wall of the furnace tube, so that the first nozzle 415 or the second nozzle 417 can eject the medium.

[0034] As a preferred embodiment of the present invention, Figure 8 As shown, the first nozzle 415 is a nozzle, which will not be described in detail here. Fig. 9 As shown, in this embodiment, a conical mounting groove is provided on the connection part 409 and at the end of the liquid guiding channel 407, and the conical mounting groove is connected with the liquid guiding channel 407 through the assembly groove 416. The second nozzle 417 is assembled in the conical mounting groove, and the second nozzle 417 is connected with the connection part 409 through the second connecting spring 418 installed in the assembly groove 416. The medium drives the second nozzle 417 to move outward, and the second connecting spring 418 is in a stretched state. At the same time, a conical jet channel is formed between the second nozzle 417 and the conical mounting groove, and the medium is sprayed on the inner wall of the furnace tube through the jet channel to achieve the purpose of auxiliary cleaning of dirt.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An online corrosion measurement system for chemical cleaning of electrode boiler tubes, characterized by: It comprises an upper connecting tube rotatably mounted on a mounting seat, a driving mechanism for driving the upper connecting tube to rotate is installed between the upper connecting tube and the mounting seat, a snake-shaped conduit, a lower connecting tube, an elastic inner wall scraping mechanism, an elastic sealing bag and a corrosion detection probe are installed in sequence vertically downward at the lower end of the upper connecting tube, the elastic inner wall scraping mechanism and the elastic sealing bag are both connected to the medium supply pipe system; the elastic inner wall scraping mechanism comprises a plurality of outward-stretching scraping units movably connected in sequence vertically, and an assembly cavity is formed in each outward-stretching scraping unit, The vertical hard spring is arranged in the assembly cavity, and the two ends of the vertical hard spring are respectively connected to the uppermost outward-stretching scraping unit and the lowermost outward-stretching scraping unit, and the medium supply pipe system is connected to each assembly cavity; the outward-stretching scraping unit includes a cylindrical assembly with an active cavity, and an active tube with a cross-section of an outer peripheral wall being a regular polygon is coaxially connected to the upper end of the cylindrical assembly, and a flange extending radially outward is constructed at the upper end of the active tube, and the active tubes in adjacent cylindrical assemblies are movably inserted into the active tubes of the corresponding cylindrical assemblies. In the movable cavity, the assembly cavity is formed between the movable cavity and the inner cavity of the movable tube, and a plurality of scraping assemblies are elastically connected uniformly in the circumference of the cylindrical assembly, and each of the scraping assemblies extends radially outwardly along the cylindrical assembly and communicates with the assembly cavity; a plurality of assembly arms are uniformly constructed on the circumferential surface of the cylindrical assembly along its circumference, and each of the assembly arms extends radially outwardly along the cylindrical assembly; the scraping assembly includes a connecting arm whose one end extends into the cylindrical assembly through the corresponding assembly arm, and a scraping member is detachably connected to the other end of the connecting arm, and the portion where the connecting arm and the assembly arm are mutually inserted is connected by a first connecting spring, and the first connecting spring extends radially along the cylindrical assembly; the scraping member includes an integrally formed connecting portion and a circumferential scraping portion, and axial scraping portions are respectively formed at the upper and lower ends of the scraping member, and at least one liquid guide channel is opened in the connecting arm, and the liquid guide channel extends radially along the cylindrical assembly and communicates with the outside through the scraping member, and the liquid guide channel is communicated with the assembly cavity, and a first nozzle or a second nozzle is installed on the connecting portion and at the end of the liquid guide channel.

2. The corrosion online measurement system for chemical cleaning of electrode boiler tubes according to claim 1 is characterized by: The driving mechanism includes an assembly shell installed on the mounting seat, a driving motor is installed in the assembly shell, a first pulley is coaxially mounted on the output shaft of the driving motor, and a second pulley is coaxially mounted outside the upper connecting tube, and the first pulley and the second pulley are connected via a transmission belt.

3. The corrosion online measurement system for chemical cleaning of electrode boiler tubes according to claim 1 is characterized by: The medium supply pipe system includes a liquid-conducting metal hose installed in a snake-shaped catheter and extending along its shape. The lower end of the liquid-conducting metal hose is connected to an elastic inner wall scraping mechanism, and the lower end of the elastic inner wall scraping mechanism is connected to an elastic sealing bag via a telescopic tube rotatably connected thereto. The upper end of the liquid-conducting metal hose extends out of an upper connecting tube, and a conversion sleeve is rotatably connected to the upper part of the liquid-conducting metal hose. A plurality of conducting holes are opened on the liquid-conducting metal hose and at a position located inside the conversion sleeve, and a conversion tube is constructed on the conversion sleeve.

4. The corrosion online measurement system for chemical cleaning of electrode boiler tubes according to claim 3 is characterized by: The corrosion detection probe includes a probe body arranged below the elastic sealing bag, the upper end of the probe body is connected to a wire, and the wire passes through the elastic sealing bag, the telescopic tube, the elastic inner wall scraping mechanism, the lower connecting tube and the liquid-conducting metal hose in sequence, and a plug connector is installed at the upper end of the wire.

5. The corrosion online measurement system for chemical cleaning of electrode boiler tubes according to claim 3 is characterized by: The telescopic tube comprises a plurality of tube bodies which are plugged in sequence vertically, the tube body at the top is rotatably connected to the lower end of the elastic inner wall scraping mechanism, and the elastic sealing bag is coaxially assembled outside the tube body at the bottom and communicated with the tube body.

6. The corrosion online measurement system for chemical cleaning of electrode boiler tubes according to claim 1 is characterized by: A conical mounting groove is provided on the connecting portion and at the end of the liquid guiding channel, and the conical mounting groove is connected with the liquid guiding channel through the assembly groove; the second nozzle is assembled in the conical mounting groove and connected with the connecting portion through the second connecting spring installed in the assembly groove.

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