Anti-corrosion device for boiler

Abstract

The utility model belongs to the technical field of paint spraying, and particularly relates to a boiler anti-corrosion device which comprises a movable vehicle body and a spraying machine fixedly connected to the movable vehicle body, an output port of the spraying machine is connected with a spraying gun through a high-pressure pipe, a paint storage barrel is fixedly connected to the movable vehicle body, and an anti-solid mixing mechanism is arranged in the paint storage barrel. An output port of the spray gun is provided with an auxiliary spraying unit; according to the anti-corrosion device for the boiler, the precipitation phenomenon can be reduced through the anti-solid mixing mechanism, the anti-solid mixing mechanism assists in mixing with a diluent to adjust the viscosity, maintain the activity of alkyd enamel, prevent the alkyd enamel from being solidified, facilitate the subsequent spraying work and guarantee the quality of the anti-corrosion work, a motor is used for driving in the anti-solid mixing mechanism to drive a rotating roller to rotate, and the anti-corrosion effect is improved. The stirring blades and the scraping rod work, the edge alkyd enamel paint can be mixed through the scraping rod, the mixing efficiency is improved, meanwhile, the paint can be prevented from being adhered to the inner wall of the paint storage barrel, and follow-up cleaning is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of paint spraying, and in particular relates to a boiler anti-corrosion device. Background Art

[0002] The circulating drum boiler is a full steel frame structure, arranged in the open air. The boiler steel structure is exposed to the external environment and is subjected to chemical and electrochemical corrosion from humid air for a long time. There will be large-scale serious corrosion and paint peeling, and the corrosion situation continues to worsen. Such corrosion phenomenon will directly affect the mechanical strength and service life of the steel structure, and bring great harm and hidden dangers to the long-term use of the steel structure. Corrosion is one of the fatal shortcomings of steel structure. Once the steel structure is corroded, its main mechanical performance indicators such as strength and plasticity will drop significantly, seriously reducing the safety and durability of the steel structure. It seriously affects the safety of the boiler steel structure. Therefore, it is necessary to remove rust and corrosion in the severely corroded areas of the boiler body steel structure, otherwise it will cause irreversible harm to the safe production of the boiler.

[0003] After checking, the public (announcement) number: CN217190431U discloses an anti-corrosion paint spraying equipment. This technology discloses "including an equipment bracket, a positioning seat is fixedly provided on one side of the top of the equipment bracket, a paint bucket is placed inside the positioning seat, and a gun head cleaning box is fixedly provided on the other side of the top of the equipment bracket." and other technical solutions; it has "a gun head cleaning box is provided, after the spraying is completed, the used gun head is inserted into the opening of the gun head cleaning box and extended inwardly, and in the process of extending inwardly, the pressure structure drives the two connecting rods to open, and the corresponding upper sleeve and lower sleeve slide, and the gun head is pulled back and forth to make the gun head contact with the bristles, and the paint remaining on the surface of the gun head and the muzzle is removed by the bristles, so as to avoid the solidified paint at the muzzle affecting the spraying efficiency when it is used next time." and other technical effects;

[0004] In the above device, the anti-corrosion material is stored in a paint bucket, and then the material is sprayed by a gun head. However, the paint itself is a mixture of resin, pigment, filler, solvent, etc. During the anti-corrosion spraying process, it is placed and stored in a bucket. Under the action of gravity, there will inevitably be different degrees of precipitation. In addition, some anti-corrosion paints, such as alkyd enamels, need to be mixed with a thinner to adjust the viscosity before use. If they are left standing, they will gradually become hard and solidified due to environmental factors.

[0005] In order to solve the above problems, a boiler anti-corrosion device is proposed in the present application. Utility Model Content

[0006] To solve the problems raised in the above background technology, the utility model provides a boiler anti-corrosion device, which has the characteristics of fully mixing alkyd enamel with diluent, preventing alkyd enamel from solidifying to facilitate subsequent spraying work, assisting in cleaning the inner wall of the barrel cavity and facilitating spraying of dead corners of steel frames.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a boiler anti-corrosion device, comprising a mobile body and a sprayer fixedly connected to the mobile body, the output port of the sprayer is connected to a spray gun through a high-pressure pipe, a paint storage barrel is fixedly connected to the mobile body, an anti-solid mixing mechanism is arranged inside the paint storage barrel, and an auxiliary spraying unit is arranged at the output port of the spray gun;

[0008] The anti-solid mixing mechanism includes a protective cover, a motor, a rotating roller, a stirring blade, a transmission rod and a scraper rod. The protective cover is installed on the top surface of the paint storage barrel, the motor is fixedly connected to the top surface of the protective cover, the top surface of the protective cover is provided with a rotating hole, the rotating roller is rotatably connected to the inner wall of the rotating hole of the protective cover, the stirring blade is fixedly connected to the surface of the rotating roller, the surface of the rotating roller is provided with a mounting hole, the transmission rod is fixedly connected to the inner wall of the mounting hole, and the scraper rod is fixedly connected to the side of the transmission rod.

[0009] As a preferred boiler anti-corrosion device of the utility model, the output end of the motor is fixedly connected to the top surface of the rotating roller, the number of the scraper rods is two and they are respectively fixedly connected to the two sides of the transmission rod, the side surfaces of the scraper rods fit the inner wall of the cavity of the paint storage barrel, and the inner wall of the paint storage barrel is provided with a polytetrafluoroethylene coating.

[0010] As a preferred boiler anti-corrosion device of the utility model, the inner wall of the paint storage barrel is provided with a built-in opening groove, the inner wall of the built-in opening groove is provided with a connecting reflux port and a connecting suction port, and the connecting reflux port is located above the connecting suction port.

[0011] As a preferred boiler anti-corrosion device of the utility model, a feed port is fixedly connected above the surface of the paint storage barrel, and a discharge port is fixedly connected to the bottom below the surface of the paint storage barrel.

[0012] As a preferred boiler anti-corrosion device of the utility model, the reflux port of the sprayer is connected to a connecting reflux port through a pipeline, the suction port of the sprayer is connected to a connecting suction port through a pipeline, and a reflux valve and a pressure regulating valve are provided on the front of the sprayer.

[0013] As a preferred boiler anti-corrosion device of the utility model, the auxiliary spray unit includes a threaded connecting pipe, a threaded connecting piece, an extended spray pipe and a nozzle, the threaded connecting pipe is fixedly connected to the output port of the spray gun, and the threaded connecting piece is threadedly connected to the surface of the threaded connecting pipe.

[0014] As a preferred boiler anti-corrosion device of the utility model, the extended nozzle is fixedly connected to the side of the threaded connector, and the nozzle is installed at the output end of the extended nozzle.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The boiler anti-corrosion device can reduce the occurrence of precipitation through the anti-solid mixing mechanism, and assist in mixing with a diluent to adjust the viscosity, maintain the activity of the alkyd enamel, prevent the alkyd enamel from solidifying, facilitate subsequent spraying work, and ensure the quality of the anti-corrosion work. In the anti-solid mixing mechanism, a motor is used to drive the rotating roller to rotate, so that the stirring blade and the scraper work, and the scraper can be used to mix the edge alkyd enamel, which improves the mixing efficiency and prevents the paint from adhering to the inner wall of the paint storage barrel, facilitating subsequent cleaning.

[0017] The boiler anti-corrosion device can facilitate spraying of dead corners of steel frames through an auxiliary spraying unit, lengthen the distance between the spray gun output port and the nozzle to prevent affecting the workers, and connect the extended nozzle to the spray gun output end through a threaded connection in the auxiliary spraying unit to achieve the purpose of lengthening the output port. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model from the back side in a top view;

[0021] Figure 3 It is a structural schematic diagram of the spray gun and the auxiliary spray unit in the utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the paint storage barrel in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the protective mixer mechanism in the utility model.

[0024] In the figure: 1. mobile body; 2. sprayer; 201. reflux valve; 202. pressure regulating valve; 3. spray gun; 4. paint storage barrel; 41. built-in slot; 42. connection to reflux port; 43. connection to suction port; 44. feed port; 45. discharge port; 401. protective cover; 402. motor; 403. rotating roller; 404. stirring blade; 405. transmission rod; 406. scraper rod; 501. threaded connecting pipe; 502. threaded connector; 503. extension nozzle; 504. nozzle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] like Figure 1-Figure 2 As shown;

[0028] A boiler anti-corrosion device comprises a mobile body 1 and a sprayer 2 fixedly connected to the mobile body 1, wherein the output port of the sprayer 2 is connected to a spray gun 3 via a high-pressure pipe;

[0029] In this embodiment: the existing CN217190431U {publication (announcement) number}: discloses an anti-corrosion paint spraying equipment, which discloses "including an equipment bracket, a positioning seat is fixedly provided on one side of the top of the equipment bracket, a paint bucket is placed inside the positioning seat, and a gun tip cleaning box is fixedly provided on the other side of the top of the equipment bracket." and other technical schemes; it has "a gun tip cleaning box is provided, and after the spraying is completed, the used gun tip is inserted into the opening of the gun tip cleaning box and extended inwardly. In the process of extending inwardly, the pressure structure drives the two connecting rods to open, and the corresponding upper sleeve and lower sleeve slide, and the gun tip is pulled back and forth to make the gun tip contact with the bristles, and the paint remaining on the surface of the gun tip and the muzzle is removed by the bristles to avoid the solidified paint at the muzzle affecting the spraying efficiency when it is used next time." and other technical effects As a result, this application makes further improvements on this existing anti-corrosion device, and please refer to the disclosed technology below for details; to solve the technical problems existing in this prior art, as disclosed in the background technology above, "in the above-mentioned device, the anti-corrosion material is stored in a paint bucket, and then the material is sprayed by a gun head. However, the paint itself is a mixture of resin, pigment, filler, solvent, etc. During the anti-corrosion spraying process, it is placed and stored in a bucket. Under the action of gravity, there will inevitably be different degrees of precipitation, and some anti-corrosion paints, such as alkyd enamel, need to be mixed with a diluent to adjust the viscosity before use. If it is to be left still, it will gradually become hard and solidified due to environmental factors." In terms of combined use, this problem is obviously a real problem that exists and is relatively difficult to solve. In view of this, in order to solve this technical problem, the following improvement plan is proposed.

[0030] More specifically:

[0031] like Figure 1-Figure 5 As shown;

[0032] Combining the above:

[0033] A boiler anti-corrosion device comprises a mobile body 1 and a sprayer 2 fixedly connected to the mobile body 1, wherein the output port of the sprayer 2 is connected to a spray gun 3 via a high-pressure pipe, a paint storage barrel 4 is fixedly connected to the mobile body 1, an anti-solid mixing mechanism is arranged inside the paint storage barrel 4, and an auxiliary spraying unit is arranged at the output port of the spray gun 3;

[0034] The anti-solid mixing mechanism includes a protective cover 401, a motor 402, a rotating roller 403, a stirring blade 404, a transmission rod 405 and a scraper rod 406. The protective cover 401 is installed on the top surface of the paint storage barrel 4, the motor 402 is fixedly connected to the top surface of the protective cover 401, a rotating hole is opened on the top surface of the protective cover 401, the rotating roller 403 is rotatably connected to the inner wall of the rotating hole of the protective cover 401, the stirring blade 404 is fixedly connected to the surface of the rotating roller 403, the surface of the rotating roller 403 is opened with a mounting hole, the transmission rod 405 is fixedly connected to the inner wall of the mounting hole, and the scraper rod 406 is fixedly connected to the side of the transmission rod 405.

[0035] In this embodiment: the boiler anti-corrosion device can reduce the occurrence of precipitation through the anti-solid mixing mechanism, and assist in mixing with the diluent to adjust the viscosity, maintain the activity of the alkyd enamel, prevent the alkyd enamel from solidifying, facilitate subsequent spraying work, and ensure the quality of the anti-corrosion work. In the anti-solid mixing mechanism, it is driven by the motor 402 to drive the rotating roller 403 to rotate, so that the stirring blade 404 and the scraper 406 work, and the scraper 406 can be used to mix the edge alkyd enamel, which improves the mixing efficiency and prevents the paint from adhering to the inner wall of the paint storage barrel 4, which is convenient for subsequent cleaning. When the utility model is in use, first ensure that the upper surface of the entire steel frame of the boiler has been rust-removed, and use electric tools to thoroughly polish the corroded areas and the old paint film on the surface of the steel structure, and the rust removal standard reaches Sa2.5 level. The rust removal is carried out in sections. Anti-corrosion treatment can be carried out only after the rust removal is accepted. The auxiliary spray unit is installed on the spray gun 3, and the alkyd enamel and X-6 thinner are put into the paint storage barrel 4 according to the proportion. The motor 402 is started to drive the rotating roller 403 to rotate, and the stirring blade 404 rotates with the rotating roller 403 to stir and mix the alkyd enamel and the X-6 thinner, and the transmission rod 405 also follows the rotating roller 403 to drive the scraper rod 406 to rotate. The scraper rod 406 can scrape the inner wall of the cavity of the paint storage barrel 4 to further mix the edge alkyd enamel, and also facilitate subsequent cleaning; when cleaning is needed, add an appropriate amount of clean water and detergent into the paint storage barrel 4. Similarly, the motor 402 is started to stir the clean water to clean the cavity of the paint storage barrel 4, and the scraper rod 406 works to clean the inner wall of the cavity of the paint storage barrel 4.

[0036] Going further:

[0037] In an optional embodiment, the output end of the motor 402 is fixedly connected to the top surface of the rotating roller 403, and the number of scraper rods 406 is two, which are respectively fixedly connected to the two sides of the transmission rod 405, and the side surfaces of the scraper rods 406 are in contact with the inner wall of the cavity of the paint storage barrel 4.

[0038] In this embodiment, the starter motor 402 drives the rotating roller 403 to rotate, and the transmission rod 405 follows the rotating roller 403 to drive the scraper rod 406 to rotate. The scraper rod 406 can scrape the inner wall of the cavity of the paint storage barrel 4.

[0039] Going further:

[0040] In an optional embodiment, the inner wall of the paint storage barrel 4 is provided with a built-in opening groove 41 , and the inner wall of the built-in opening groove 41 is provided with a connecting reflux port 42 and a connecting suction port 43 , and the connecting reflux port 42 is located above the connecting suction port 43 .

[0041] In the present embodiment: the reflux port of the sprayer 2 is connected to the connecting reflux port 42 through a pipeline, and the suction port of the sprayer 2 is connected to the connecting suction port 43 through a pipeline. When the sprayer 2 is started, the sprayer 2 sucks material through the connecting suction port 43 connected to the paint storage barrel 4. Due to the operation of the anti-solid mixing mechanism, the fluidity of the alkyd enamel can be maintained to facilitate suction, and reflux is carried out through the connecting reflux port 42.

[0042] Going further:

[0043] In an optional embodiment, a feed port 44 is fixedly connected above the surface of the paint storage barrel 4 , and a discharge port 45 is fixedly connected to the bottom below the surface of the paint storage barrel 4 .

[0044] In this embodiment, the feed port 44 is convenient for feeding materials into the paint storage barrel 4 , and the discharge port 45 is capable of discharging the residual materials in the paint storage barrel 4 .

[0045] Going further:

[0046] In an optional embodiment, the return port of the sprayer 2 is connected to the return port 42 through a pipeline, the suction port of the sprayer 2 is connected to the suction port 43 through a pipeline, and a return valve 201 and a pressure regulating valve 202 are provided on the front of the sprayer 2.

[0047] In this embodiment: start the sprayer 2, unscrew the reflux valve 201, and the sprayer 2 sucks material through the suction port 43 connected to the paint storage barrel 4. Due to the operation of the anti-solid mixing mechanism, the fluidity of the alkyd enamel can be maintained to facilitate suction, and reflux is carried out through the reflux port 42. Turn the pressure regulating valve 202 to prepare for anti-corrosion work.

[0048] Going further:

[0049] In an optional embodiment, the auxiliary spraying unit includes a threaded connecting pipe 501, a threaded connecting piece 502, an extended nozzle 503 and a nozzle 504, the threaded connecting pipe 501 is fixedly connected to the output port of the spray gun 3, and the threaded connecting piece 502 is threadedly connected to the surface of the threaded connecting pipe 501.

[0050] In this embodiment: the boiler anti-corrosion device can facilitate spraying of dead corners of the steel frame through the auxiliary spraying unit, lengthen the distance between the output port of the spray gun 3 and the nozzle 504 to prevent affecting the staff, and connect the extended nozzle 503 to the output end of the spray gun 3 through a threaded connection in the auxiliary spraying unit to achieve the purpose of lengthening the output port.

[0051] Going further:

[0052] In an optional embodiment, the extended nozzle 503 is fixedly connected to the side of the threaded connector 502 , and the nozzle 504 is installed at the output end of the extended nozzle 503 .

[0053] In this embodiment: the extended nozzle 503 is fastened to the threaded connection pipe 501 on the spray gun 3 through the threaded connector 502, and the nozzle 504 is installed. The staff holds and controls the spray gun 3 to perform anti-corrosion treatment on the boiler steel frame. When it is necessary to perform anti-corrosion treatment on the dead corner of the steel frame, it is necessary to control the spray gun 3 to adjust the angle so that the nozzle 504 is aligned with the dead corner using the extended nozzle 503, and then spray the alkyd enamel.

[0054] The working principle and use process of this utility model:

[0055] When using the utility model, first ensure that the upper surface of the boiler steel frame has been rust-free, and use electric tools to thoroughly polish the corroded areas and old paint film on the steel structure surface, and the rust removal standard reaches Sa2.5 level. Rust removal is carried out in sections, and anti-corrosion treatment can only be carried out after the rust removal is accepted.

[0056] The extended spray pipe 503 is fastened to the threaded connection pipe 501 on the spray gun 3 through the threaded connection piece 502, the nozzle 504 is installed, the alkyd enamel and the X-6 thinner are put into the paint storage barrel 4 from the feed port 44 according to the proportion, the motor 402 is started to drive the rotating roller 403 to rotate, the stirring blade 404 rotates with the rotating roller 403 to stir and mix the alkyd enamel and the X-6 thinner, and the transmission rod 405 also rotates with the rotating roller 403 to drive the scraper rod 406 to rotate. The scraper rod 406 can scrape the inner wall of the cavity of the paint storage barrel 4 to further mix the edge alkyd enamel, and it is also convenient for subsequent cleaning.

[0057] The device is moved to the anti-corrosion working position by pushing the mobile vehicle 1. If it is necessary to perform anti-corrosion treatment on the high part of the steel frame structure of the boiler, it can be moved to the relevant lifting device to perform high-level anti-corrosion work. After reaching the designated working position, the sprayer 2 is started, and the reflux valve 201 is turned on. The sprayer 2 absorbs material through the connecting suction port 43 connected to the paint storage barrel 4. Due to the operation of the anti-solid mixing mechanism, the fluidity of the alkyd enamel can be maintained to facilitate material absorption, and reflux is performed through the connecting reflux port 42. The pressure regulating valve 202 is turned to prepare for anti-corrosion work. The staff holds and controls the spray gun 3 to perform anti-corrosion treatment on the boiler steel frame. When it is necessary to perform anti-corrosion treatment on the dead corner of the steel frame, the spray gun 3 needs to be controlled to adjust the angle so that the nozzle 504 is aligned with the dead corner using the extended nozzle 503, and the alkyd enamel is sprayed.

[0058] When spraying anti-corrosion work, it should be noted that the anti-corrosion work is divided into three processes: primer, intermediate paint and topcoat, and alkyd enamel is used for all of them. There are two coats of primer, each with a thickness of 45-50um, the thickness of the intermediate paint is 45-50um, and the thickness of the topcoat is 60um.

[0059] When performing anti-corrosion work, the anti-solid mixing mechanism needs to work continuously or multiple times to maintain the activity of the alkyd enamel, prevent the alkyd enamel from solidifying, and ensure the quality of the anti-corrosion work.

[0060] After the anti-corrosion work is completed, tighten the pressure regulating valve 202 and the reflux valve 201, turn off the sprayer 2 and the motor 402, use the storage container to align with the discharge port 45, unscrew the control valve on the discharge port 45, and discharge the remaining alkyd enamel in the paint storage barrel 4. After the discharge is completed, close the control valve.

[0061] Add appropriate amount of clean water and detergent into the paint storage barrel 4, and similarly start the motor 402 to stir the clean water to clean the cavity of the paint storage barrel 4. The scraper 406 works to clean the inner wall of the cavity of the paint storage barrel 4. Similarly, start the sprayer 2, and use the spray gun 3 to open and close it multiple times. Use the extended nozzle 503 and the nozzle 504 to drain water and clean the inside to prevent residual alkyd enamel from clogging and affecting the next use. After cleaning to a certain extent, turn off the sprayer 2 and the motor 402, unscrew the control valve on the discharge port 45, and discharge the residual liquid in the paint storage barrel 4. After discharging, close the control valve to complete the cleaning.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A boiler anti-corrosion device, comprising a mobile body (1) and a sprayer (2) fixedly connected to the mobile body (1), wherein the output port of the sprayer (2) is connected to a spray gun (3) via a high-pressure pipe, and characterized in that: The mobile vehicle body (1) is fixedly connected to a paint storage barrel (4), the interior of the paint storage barrel (4) is provided with an anti-solid mixing mechanism, and the output port of the spray gun (3) is provided with an auxiliary spraying unit; The anti-solid mixing mechanism comprises a protective cover (401), a motor (402), a rotating roller (403), a stirring blade (404), a transmission rod (405) and a scraper rod (406); the protective cover (401) is mounted on the top surface of the paint storage barrel (4); the motor (402) is fixedly connected to the top surface of the protective cover (401); a rotating hole is provided on the top surface of the protective cover (401); the rotating roller (403) is rotatably connected to the inner wall of the rotating hole of the protective cover (401); the stirring blade (404) is fixedly connected to the surface of the rotating roller (403); a mounting hole is provided on the surface of the rotating roller (403); the transmission rod (405) is fixedly connected to the inner wall of the mounting hole; and the scraper rod (406) is fixedly connected to the side of the transmission rod (405).

2. The boiler anti-corrosion device according to claim 1, characterized in that: The output end of the motor (402) is fixedly connected to the top surface of the rotating roller (403), and the number of the scraper rods (406) is two, which are respectively fixedly connected to the two sides of the transmission rod (405), and the side surfaces of the scraper rods (406) are in contact with the inner wall of the cavity of the paint storage barrel (4).

3. The boiler anti-corrosion device according to claim 1, characterized in that: The inner wall of the paint storage barrel (4) is provided with a built-in opening groove (41), and the inner wall of the built-in opening groove (41) is provided with a connecting reflux port (42) and a connecting suction port (43), and the connecting reflux port (42) is located above the connecting suction port (43).

4. The boiler anti-corrosion device according to claim 1, characterized in that: A feed port (44) is fixedly connected above the surface of the paint storage barrel (4), and a discharge port (45) is fixedly connected to the bottom below the surface of the paint storage barrel (4).

5. The boiler anti-corrosion device according to claim 1, characterized in that: The return port of the sprayer (2) is connected to a connection return port (42) via a pipeline, the suction port of the sprayer (2) is connected to a connection suction port (43) via a pipeline, and a return valve (201) and a pressure regulating valve (202) are provided on the front of the sprayer (2).

6. The boiler anti-corrosion device according to claim 1, characterized in that: The auxiliary spraying unit comprises a threaded connection pipe (501), a threaded connection piece (502), an extended spray pipe (503) and a nozzle (504); the threaded connection pipe (501) is fixedly connected to the output port of the spray gun (3); and the threaded connection piece (502) is threadedly connected to the surface of the threaded connection pipe (501).

7. The boiler anti-corrosion device according to claim 6, characterized in that: The extended nozzle (503) is fixedly connected to the side of the threaded connector (502), and the nozzle (504) is installed at the output end of the extended nozzle (503).

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