JP2012021667A - Gun barrel cleaning method and gun barrel cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gun barrel cleaning method for reliably removing and collecting soot in a gun barrel without damaging the gun barrel.SOLUTION: While dust in a bore is sucked from a gun breech 53 by a dust collector 10, and media are injected together with compressed gas, a blast gun 30 is moved from the gun breech 53 side to a muzzle 51 side, so as to remove soot. Compressed air including no media is injected and the blast gun 30 is pushed in from the muzzle 51 side to the gun breech 53 side, so as to push out the media and soot from the gun breech 53 and collect the media and soot by the dust collector 10. A diffuser 33 provided at the tip of the blast gun 30 diffuses injected injection fluid in 360 degree direction. Thus, the media collide with a bore inner wall uniformly, and the media and soot can be reliably collected by pushing in the blast gun 30.

Description

  The present invention relates to a gun barrel cleaning method and a gun barrel cleaning device, and more particularly to a cleaning method and a cleaning device for projecting a medial surface of a gun cavity formed in a gun barrel of a tank or the like.

  The barrel of the Type 90 tank owned by the Ground Self-Defense Force employs a smooth barrel called “sliding cannon” that does not have a life ring in its canal.

  The artillery shell used in such a “sliding cannon” is equipped with a cartridge case called a burned-out cartridge case, which has a structure in which the cartridge case is burned away leaving the bottom. There is no need to throw it away.

  However, with such a burning cartridge, the flame that accompanies the burning of the cartridge is attached to the gun cavity after the shell is fired, and if this flame is left attached, the gun barrel may be corroded. In the case of performing the cleaning, a cleaning operation for removing wrinkles and the like adhering to the canal after the training is completed is performed.

  As shown in FIG. 6, such canal cleaning is usually performed by using a cleaning tool called a “cleaning rod” in which a cloth or other wiping material 102 is attached to the end of an aluminum pipe member 101. The cleaning rod 100 is inserted into the canal 152 through the mouth 151, and the cleaning rod 100 is moved forward and backward in the canal 152 by several persons, so that the wiping material 102 attached to the cleaning rod 100 is rubbed against the inner wall of the canal 152. ing.

  However, according to this method, in order to be able to strongly press the wiping material 102 against the inner wall of the cannon 152, the cleaning rod 100 having the wiping material 102 attached to a diameter larger than the inner diameter of the canal 152. Therefore, it is necessary to perform the above-described operation by pushing the nozzle into the canal 152, so that an extremely large force is required to move the cleaning rod 100 forward and backward within the canal 152, and several people are required to clean one gun barrel 150. It is necessary for the staff.

  In order to easily clean the gun barrel 150, the hydraulic pump 202 arranged outside the gun barrel 150, the hydraulic motor 203 inserted into the gun barrel 150, and the hydraulic pump 202 are used as shown in FIG. A cleaning oil hose 204 for supplying cleaning oil to the hydraulic motor 203, a winding drum 205 of the cleaning oil hose 204, a brush 209 rotated by the hydraulic motor 203, and the cleaning oil supplied into the hydraulic motor 203 are used. A sprinkler 210 that is distributed into the barrel, a cleaning oil tank 214 that stores cleaning oil that flows out of the gun barrel 150 from the gun barrel 150, and a cleaning that supplies the cleaning oil from the tank 214 to the hydraulic pump 202 via the filter 218 A maintenance device 200 inside the barrel including an oil supply pipe 217 has been proposed (Patent Document 1).

  Although not related to gun barrel cleaning, as a technique related to the cleaning of the inner surface of an existing buried pipe, a dust collector 305 is provided on one end side of the buried pipe a and a blower 301 is provided on the other end side as shown in FIG. An aeration flow is generated in a, and this circulating gas is passed through an annular circumferential space 321 formed between the outer peripheral surface of the plug body 302 disposed in the embedded tube a and the inner peripheral surface of the embedded tube a. While accelerating the flow velocity, the plug 302 is circulated in the pipe while the abrasive material pumped by the abrasive particle feeding device 304 is ejected from the nozzle 303 provided in the plug 302 into the accelerated gas flowing in the pipe. There has also been proposed a method of cleaning the inside of the buried pipe a by using gas as a driving source and gradually moving toward the front of the pipe while applying braking to the outside of the pipe (Patent Document 2).

Japanese Utility Model Publication No. 64-31394 Japanese Patent Publication No. 3-4277

  Among the conventional techniques described above, the maintenance device 200 inside the gun barrel introduced as Patent Document 1 uses this to clean the inside of the gun barrel 150, thereby greatly reducing the work labor borne by the worker. Can be reduced.

  However, since this apparatus has an extremely large apparatus configuration as described above, a large initial investment is required for its introduction, and the inside of the gun barrel 150 is cleaned using cleaning oil. , Running costs such as cost of consumed cleaning oil and disposal cost of used cleaning oil are incurred.

  Although it is not a technique related to cleaning the gun barrel 150, as introduced in Patent Document 2 mentioned above, as a method of cleaning the inner surface of the existing buried pipe a which is a cylindrical body like the gun barrel, the gas flow passing through the pipe is polished. There has also been proposed a technique for performing cleaning by placing and moving a material.

  However, “cleaning” performed on the buried pipe “a” in Patent Document 2 is an operation performed in place of scraping off rust with a scraper, a wire brush, or the like (“Prior Art and its Problems” in Patent Document 2). Column), that is, a cutting operation, and there is no idea to apply sandblasting for performing such cutting to the inner peripheral surface of the gun cavity finished with high precision.

  In addition, even if there is a slight deviation in the processing accuracy of the inner surface of buried pipes, etc., if the required wall thickness is secured, the performance may be greatly impaired, and a serious accident may occur. Furthermore, even if some abrasive material remains in the buried pipe without being recovered, this does not greatly affect the performance and safety.

  However, cleaning of the gun barrel greatly affects the performance and safety when the processing state in the gun cavity is uneven or when abrasives that could not be collected remain in the gun cavity.

  Considering this point again, the method described in Patent Document 2 is changed. In the method described in Patent Document 2, the airflow passing through the annular gap 321 between the outer periphery of the plug 302 and the inner periphery of the buried pipe a is changed. On the other hand, since the polishing material is jetted from the nozzle hole 303 provided in the plug 302 and joined, the processing is most advanced in the inner wall portion of the buried pipe a on the passage line of the nozzle hole 303. It is not possible to perform uniform processing over the entire inner circumference of the buried pipe.

  Therefore, when such a cleaning method is applied to gun barrel cleaning, if the process is continued until a part of the fistula remains unremoved or the fistula is completely removed, the inside of the cannon is partially worn. There is a risk.

  Further, in the configuration described in Patent Document 2, if it is desired to collect the sprayed abrasive without leaving it, it is necessary to use the blower 301 in addition to the abrasive particle pressure feeding device 304. As a result, the dust collector 305 is also used. A large dust collector 305 having a suction capacity corresponding to the sum of the volume of gas introduced into the pipe a by the abrasive grain pressure feeding device 304 and the volume of gas introduced into the pipe a by the blower 301 is provided. It is necessary to use it, and the device configuration becomes large and expensive.

  Therefore, the present invention can perform cleaning for removing the soot adhering to the inner surface of the gun barrel of a tank or the like by the jetting / collision of the media, which is a granular material, instead of the cleaning by the cleaning soot described above. And a method for cleaning the gun barrel that can perform uniform processing over the entire inner circumference of the gun barrel and can be recovered without leaving any particles injected into the gun barrel or removed soot. It is another object of the present invention to provide a cleaning device.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This symbol is intended to clarify the correspondence between the description of the claims and the description of the mode for carrying out the invention. Needless to say, it is used for the interpretation of the technical scope of the claims of the present invention. It is not used restrictively.

In order to achieve the above object, the gun barrel cleaning method of the present invention is a gun barrel of a gun barrel 50 that is to be cleaned with a blast gun 30 that allows the fluid jetted from the jet port 32 to diffuse 360 ° in all directions in the outer circumferential direction. Inserted into the cannon 52 from the mouth 51 toward the breech 53,
The blast gun 30 is moved to the muzzle 51 while injecting a fluid mixture of compressed gas and media from the blast gun 30 while the inside of the cannon 52 is sucked by the dust collector 10 communicated with the breech 53,
After the movement of the blast gun 30 to the muzzle 51 is completed, the blast gun 30 is again moved in the cannon 52 toward the breech 53 side while only the compressed gas is injected from the blast gun 30. By moving, the media and the rod in the cannon 52 are pushed out from the breech 53 (Claim 1).

  In this specification, “media” includes various particles that can remove wrinkles by impact when colliding with the inner wall of the cannon 52, and examples thereof include abrasives and shots.

  The cleaning method is preferably performed in a state where the gun barrel 50 is inclined by 10 to 20 ° with the muzzle 51 side facing upward (Claim 2).

  In the cleaning method, the media may be a spherical particle, for example, a shot of steel or ceramic, or a bead of glass or resin, preferably a glass bead.

  Furthermore, the injection pressure of the media can be set to 0.3 MPa to 0.5 MPa (gauge pressure).

Further, the gun barrel cleaning device of the present invention sucks the inside of the cannon 52 by communicating with the blast gun 30 which is inserted into the cannon 52 from the muzzle 51 and moves in the cannon 52 and the turret 53. A dust collector 10 and a pressure feeding device 20 for introducing a mixed fluid of compressed gas and media or a compressed gas into the blast gun 30;
The small-diameter portion of the diffuser 33 having a large-diameter portion 33b formed in a substantially truncated cone shape and a cylindrical thin-diameter portion 33a formed continuously on the small-diameter side of the large-diameter portion 33b. The large-diameter portion 33b of the diffuser 33 is attached in front of the injection port 32 of the blast gun by concentrically inserting the 33a into the injection port of the blast gun. The fluid is guided by an inclined surface 33c provided in the large-diameter portion 33b of the diffuser 33 so as to be able to diffuse 360 ° in all directions in the outer circumferential direction (Claim 5).

  In the cleaning device having the above-described configuration, the gun barrel 50 is a slide gun, and comes into contact with an inner wall of the cannon cavity 52 attached to a tip of the leg 34 and a leg 34 protruding in the outer peripheral direction with the blast gun 30 as a center. The blast gun 30 can be moved in the center of the cannula 52 (Claim 6).

  According to the configuration of the present invention described above, according to the barrel cleaning method of the present invention, the mixed fluid of the compressed gas and the media that has been ejected from the ejection port 32 of the blast gun 30 is spread in all directions of 360 ° in the outer peripheral direction. Since it was diffused without any gaps, the media injected from the blast gun 30 could be made to collide with the inner wall of the cannon 52 uniformly over the entire circumference.

  As a result, machining unevenness due to the uneven distribution of the media can be prevented, and the wrinkles adhering to the canal 52 are completely removed over the entire circumference while preventing the occurrence of harmful effects such as partial wear of the canal 52. We were able to.

  In addition, when only the compressed gas is introduced into the blast gun 30 after the injection of the media by the blast gun 30 described above, the distance between the blast gun 30 and the inner wall of the cannon 52 by the compressed gas injected from the blast gun 30 is as shown in FIG. As shown, an air curtain is formed by a compressed gas flow.

  As a result, when the blast gun 30 is pushed from the muzzle 51 side toward the breech 53 side in a state where such an air curtain is formed, the canal cavity is caused by the collision of the media and the media that remain in the canal 52 The soot peeled off the inner wall of the turret 52 can be pushed into the breech 53 side reliably, and as a result, the media in the turret 52 and the removed soot can be reliably recovered by the dust collector 10 communicating with the turret 53. I was able to.

  In the case where the above-described processing is performed with the muzzle 51 side of the gun barrel 50 facing upward and tilted by 10 to 20 °, the dust collector 10 more reliably prevents the jetted media and the soot peeled off by the collision of the media. Could be recovered.

  Further, when the jetting media is a sphere such as a shot or a bead, preferably a glass bead, it is possible to efficiently remove wrinkles adhering to the inner wall of the canal, while generating as much cutting force as possible to the inner wall of the canal. It was possible to prevent the wear in the cannon 52 from being reduced.

  Further, in the configuration in which the supply pressure to the blast gun 30 is 0.3 MPa to 0.5 MPa, the impact force necessary for removing the fistula can be exhibited at the time of collision with the inner wall of the cannon 52, while the cannon 52 It was possible to suitably prevent the inner wall from being cut or the like.

  Furthermore, according to the gun barrel cleaning device of the present invention provided with the blast gun 30 having the above-described configuration, the above-described gun barrel cleaning method can be suitably realized.

  If the blast gun 30 is provided with the legs 34 and the rollers 35, when the blast gun 30 is inserted into a smooth gun having no irregularities inside and moved, the gun 52 is surely formed. The center can be moved, the median can collide uniformly with the inner wall of the cannon 52 over the 360 ° front circumference direction, and an air curtain without a 360 ° break can be formed even during air blowing. .

Explanatory drawing which showed the name of each part of the gun barrel used in this specification. Explanatory drawing of the cleaning method of the gun barrel of this invention. The schematic sectional drawing which shows the structural example of a blast gun. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. Explanatory drawing of the formation state of the air curtain by a blast gun. Explanatory drawing of the conventional gun barrel cleaning method which used the cleaning rod. Explanatory drawing of the conventional care apparatus inside a barrel (corresponding to FIG. 1 of Patent Document 1). An explanatory view of a conventional in-pipe cleaning device (corresponding to FIG. 1 of Patent Document 2).

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

  In addition, the name of each part of the barrel used in this specification follows the name shown in FIG.

Device Configuration FIG. 2 is an explanatory view of tank barrel cleaning using the cleaning device of the present invention. Reference numeral 1 denotes the cleaning device of the present invention.

  As shown in FIG. 2, the cleaning device 1 includes a dust collector 10 that communicates with a turret 53 that opens a switch 54, and a blast gun 30 that is inserted into a cannon 52. And a media feeding device 20 for introducing a mixed fluid of compressed gas and media or a compressed gas to the blast gun 30.

  The dust collector 10 described above is communicated with the turret 53 described above via a cyclone 11 and a media recovery pipe 12 mounted on the upper part of the media feeding device 20 and operates the blower 13 provided in the dust collector 10. Thus, the inside of the cyclone 11 is sucked to generate a negative pressure in the cyclone 11, and the inside of the cannon 52 can be sucked from the turret 53 through the media collecting tube 12 by this negative pressure. Has been.

  With this configuration, the media in the cannon 52 sucked through the breech 53 and the heel peeled off from the inner wall of the cannon 52 are introduced into the cyclone 11 and swiveled. Reusable media that is a heavy object is collected and collected at the bottom of the cyclone 11, and soot and crushed media are introduced into the dust collector 10 together with the air flow and collected in a filter (not shown). It is configured so that clean air can be discharged out of the machine via the blower 13.

  The reusable media that has been collected in this way can be introduced from the bottom of the cyclone 11 described above into the tank 21 of the media feeding device 20 disposed below the cyclone 11.

  The above-described media feeding device 20 includes the above-described tank (pressurized tank) 21 disposed below the above-described cyclone 11 and a compressed gas supply source (not shown) such as an air compressor, and introduces a compressed fluid into the blast gun 30. , A switch for switching the compressed fluid to be stopped and introduced into a mixed fluid of media and compressed gas and introduction of compressed gas only without media, and in this embodiment, a foot switch 22 is provided.

  The media collected in the cyclone 11 drops into the pressurized tank 21 when a dump valve (not shown) provided between the lower end of the cyclone 11 and the tank 21 is opened.

  After the media is dropped into the pressurized tank 21 in this way, the above-described dump valve is closed, and compressed air from the air compressor is introduced into the pressurized tank 21 so that a predetermined pressure ( When the valve provided between the blast gun 30 and the pressurized tank 21 is opened by operating the foot switch 22 in a state where the pressure is increased to 0.3 to 0.4 MPa (gauge pressure), the media in the pressurized tank 21 is compressed. The gas is introduced into the blast gun 30 together with the gas and can be injected from the blast gun 30.

  The foot switch 22 provided in the media feeding device 20 is provided with a plurality of (two in the illustrated example) switches. When one of these switches is stepped on, the media and the compressed gas as described above. The mixed fluid is introduced into the blast gun 30, while the one switch is released and the other switch is stepped on, so that the compressed fluid introduced into the blast gun 30 is a compressed fluid containing no media. , It is configured so that only compressed gas can be used.

  In this way, the blast gun 30 for injecting the compressed fluid introduced from the media feeding device 20 is formed in a substantially cylindrical shape communicating with the media feeding device 20 via the hose 23 as shown in FIG. The blast gun body 31 has a structure in which a diffuser 33 is attached.

  The diffuser 33 includes a large-diameter portion 33b formed in a substantially truncated cone shape, and a cylindrical thin-diameter portion 33a formed continuously on the small-diameter side of the large-diameter portion 33b. The large diameter portion 33b is arranged in front of the injection port 32 by inserting at least a part of the small diameter portion 33a of the diffuser 33 concentrically into the injection port 32 of the blast gun body 31. Has been.

  Due to the presence of the diffuser 33, the fluid ejected from the ejection port 32 of the blast gun body 31 is guided by the inclined surface 33 c provided in the large diameter portion 33 b of the diffuser 33, and 360 ° in the outer circumferential direction. It is comprised so that it can diffuse uniformly.

  For example, as shown in FIG. 4, a plurality of leg portions 34 project from the blast gun body 31 at an equal angle in the circumferential direction, and a roller 35 is attached to the tip of the leg portion 34. The blast gun 30 is surely positioned at the center of the gun cavity 52 and can be smoothly moved by the roller 35 when inserted into the gun cavity 52 of the gun barrel 50.

  As shown in FIG. 3, the leg 34 and the roller 35 are provided in at least two or more positions in the longitudinal direction of the blast gun main body 31 with three or more legs at each position and inserted into the cannon 52. In this case, it is preferable that the blast gun 30 be configured so that it can be accurately placed in the center of the cannon 52.

Cleaning Method Gun barrel cleaning using the cleaning device 1 configured as described above is performed as follows.

  Prior to cleaning, if there is adhesion of lubricating oil or moisture in the canal 52, removal of soot and dirt prevents the media from adhering to the inner wall of the canal 52 and makes discharging difficult. If lubricating oil or moisture remains inside, the inside of the cannon 52 is kept dry by wiping with a waste cloth or the like in advance.

  Further, the smoke evacuator 55 provided in the gun barrel 50 is removed in advance, and an opening (not shown) communicating the smoke evacuator 55 and the inside of the gun cavity 52 is preliminarily removed. Cover it with a backing plate from the outside.

  Furthermore, in order to enable easy collection of media and spears, the gun barrel 50 may be inclined at an inclination angle of 10 to 20 °, for example, 15 °, with the muzzle 51 side facing upward. preferable.

  In this state, the switch 54 that closes the turret 53 of the barrel 50 is opened, the dust collector 10 is communicated with the breech 53 via the cyclone 11 described above, and the blast gun 30 is moved from the muzzle 51 into the canal 52. Insert into.

  The blast gun is inserted into the cannula 52 up to a portion in the cannula 52 that needs to be cleaned. For example, a hose 23 attached to the blast gun 30 is previously marked with a mark indicating the insertion length. It is convenient if the blast gun 30 is inserted up to this position.

  As described above, after the installation of each part is completed, the blower 13 of the dust collector 10 is started to suck the inside of the cannon 52, and the foot switch 22 is operated to operate the compressed gas and the media from the blast gun 30. The mixed fluid is ejected.

  Immediately after the start of injection, since the injection of the media is not stable, after waiting several seconds (for example, 5 seconds) after operating the foot switch 22, the hose 23 connected to the blast gun 30 is pulled out from the muzzle 51, etc. Then, the blast gun 30 is moved.

  The moving speed of the blast gun 30 is adjusted according to the media to be used, the injection pressure, the degree of dirt in the cannon 52, and the standard is about 30 cm for 10 seconds as an example.

  If the amount of abrasive in the pressurized tank 21 decreases during the process, the injection of the media may be stopped until the abrasive is collected in the cyclone 11, and during this time, compression is performed by switching the foot switch 22. For example, only the gas may be injected from the blast gun 30 for several seconds (10 seconds as an example).

  When the required amount of media is recovered and re-injection is possible, the blast gun 30 is moved to the muzzle 51 side while operating the foot switch 22 to inject the mixed fluid of media and compressed gas. The blast gun 30 is moved to the position of the muzzle 51 repeatedly.

  In this way, when the removal of the soot in the cannula 52 is completed by the injection of the mixed fluid of the media and the compressed gas, the foot switch 22 is once released to stop the injection of the mixed fluid, and the foot switch 22 is turned on. The other switch provided is stepped on and only the compressed gas containing no media is injected from the blast gun 30.

  In a state where the suction in the cannon 52 is continued by the dust collector 10 and the compressed gas is jetted from the blast gun 30, the blast gun 30 is gradually moved again toward the turret 53 for 10 seconds as an example. The blast gun 30 is pushed to a predetermined position on the breech 53 side by moving at a speed of about 30 cm.

  At this time, an air curtain is formed over the entire 360 ° circumference by the compressed gas injected from the blast gun 30 in the space between the blast gun 30 and the inner wall of the cannon 52 (see FIG. 5). As the blast gun 30 is pushed into the breech 53 side in the state, the media that adheres to the inner wall of the cannon 52 and the soot that floats up from the inner wall of the cannon 53 are pushed into the breech 53 side and the switch 54 is opened. It is pushed out from the opened breech 53 and introduced into the cyclone 11 through the media collecting tube 12 so that the media and soot in the cannon 52 are completely removed.

  When the work is completed in this way, the foot switch 22 is released, the injection of compressed gas by the blast gun 30 is stopped, the blast gun 30 is removed from the muzzle 51, and the blower 13 of the dust collector 10 is stopped. Suction in the cannon 52 is stopped.

  Thereafter, the media collecting tube 12 connected to the breech 53 is removed, and the cleaning of the barrel 50 is completed.

  The inside of the barrel 52 of the barrel 50 that has been cleaned is visually checked, and if dirt remains, wipe it off with a waste cloth if necessary, and close the hole at the mounting position of the smoke evacuator 55. After removing the plate and the like, the smoke evacuator 55 is attached to the barrel and the operation is completed.

  As described above, according to the barrel cleaning according to the present invention, the media injected from the blast gun 30 is uniformly injected forward 360 ° around the blast gun 30, so that the entire circumference of the inner wall of the cannon 52 is The treatment can be performed uniformly over the entire area.

  In addition, the air blow after removing or floating the soot by the injection of the media causes the air curtain formed between the outer periphery of the blast gun 30 and the inner wall of the canal 52 to reliably shoot the media and soot remaining in the canal 52. Since it can be pushed out from the tail 53, no media or wrinkle remains in the cannula 52 after cleaning.

DESCRIPTION OF SYMBOLS 1 Cleaning device 5 Tank 10 Dust collector 11 Cyclone 12 Media carrier recovery pipe 13 Blower 20 Media carrier pumping device 21 Tank (pressurized tank)
22 Foot switch 23 Hose 30 Blast gun 31 Blast gun main body 32 Injection port 33 Diffuser 33a Small diameter portion 33b Large diameter portion 33c Inclined surface 34 Leg portion 35 Roller 50 Gun barrel 51 Gun mouth 52 Turret 53 Turret 54 Switch 55 Exhaust switch Smoker 56 Chamber 100 Cleaning rod 101 Pipe material 102 Wiping material 150 Gun barrel 151 Gun mouth 152 Gun barrel 200 Gun barrel maintenance device 202 Hydraulic pump 203 Hydraulic motor 204 Cleaning oil hose 205 Winding drum 209 Brush 210 Sprinkler 214 Cleaning oil tank 217 Cleaning Oil supply pipe 218 Filter 300 In-pipe cleaning apparatus 301 Blower 302 Plug body 303 Injection hole 304 Abrasive material grain pressure feeding apparatus 305 Dust collector 321 Annular circumferential space a Embedded pipe

Claims (6)

A blast gun that allows the fluid sprayed from the spray port to diffuse 360 ° in all directions in the outer circumferential direction is inserted into the gun cavity from the muzzle of the barrel to be cleaned toward the stern.
Moving the blast gun to the muzzle while injecting a mixed fluid of compressed gas and media from the blast gun in a state where the inside of the cannon is sucked by a dust collector connected to the breech;
After the movement of the blast gun to the muzzle is completed, the blast gun is moved again toward the breech side in the canal side while only the compressed gas is injected from the blast gun. A method of cleaning a gun barrel, characterized in that a medallion and a rod in a cavity are pushed out from a breech.   2. The method of cleaning a gun barrel according to claim 1, wherein the gun barrel is inclined at 10 to 15 degrees with the muzzle side facing upward.   The method for cleaning a gun barrel according to claim 1, wherein the media is a spherical particle.   The gun barrel cleaning method according to claim 1, wherein the injection pressure of the media is 0.3 MPa to 0.5 MPa. A blast gun that is inserted into the canal through the muzzle and moves in the canal, a dust collector that communicates with the breech and sucks the inside of the canal, and a mixed fluid of compressed gas and media or compressed Equipped with a media feeding device for introducing gas,
The small-diameter portion of a diffuser having a large-diameter portion formed in a substantially truncated cone shape and a cylindrical thin-diameter portion continuously formed on the small-diameter side of the large-diameter portion is the blast gun. The large-diameter portion of the diffuser is attached in front of the injection port of the blast gun by concentrically inserting it into the injection port of the blast gun. A gun barrel cleaning device, characterized in that it can be diffused in all directions by 360 ° in an outer circumferential direction by being guided by an inclined surface provided in a diameter portion.   The gun barrel is a smooth gun, and includes a leg portion projecting in an outer peripheral direction centering on the blast gun, and a roller attached to a tip of the leg portion and in contact with the inner wall of the gun cavity. 6. The gun barrel cleaning device according to claim 5, wherein the center is movable.

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