Coating clamp for inner and outer side walls of gun barrel

Abstract

The utility model relates to a gun barrel inner and outer side wall coating clamp which comprises a main shell installed on a supporting table to form a machining cavity, a conveying assembly capable of directionally conveying pipe fittings is arranged in the main shell in a penetrating mode, and a plurality of rows of elastic supporting assemblies capable of supporting and limiting the pipe fittings are arranged on the conveying assembly at intervals. A lifting spraying assembly capable of synchronously coating the inner side wall and the outer side wall of the pipe limited by the elastic supporting assembly at the same time is further arranged on the inner top face of the main shell in a lifting mode. A drying assembly outputting directional dry airflow is further arranged on the inner top face of the main shell. According to the utility model, different types of film coating treatment can be carried out on the inner and outer side pipe walls of the gun barrel at the same time, so that the coating uniformity and the coating efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gun barrel coating equipment, in particular to a gun barrel inner and outer wall coating fixture. Background Art

[0002] The barrel specifically refers to the surface of the barrel between the two sights on the firearm. It is divided into smoothbore barrels and rifled barrels. The barrel is one of the main components of the firearm. It is usually made of a heat-resistant and non-deformable metal tube and connected to the chamber. When in use, the barrel, as a ballistic limiting structural part, must withstand high heat and high pressure. Generally, the outer diameter of the bullet is larger than the inner diameter of the barrel. At the beginning of shooting, when the bullet enters the throat of the barrel, the outer diameter of the bullet shrinks, and the shell of the bullet and the inside of the barrel form a tight fit closed state. This closed state can seal the combustion gas in the chamber and form chamber pressure. Therefore, the failure form inside the barrel is generally dry friction wear under high temperature and high pressure, which will greatly reduce the service life of the barrel. At the same time, the barrel also needs its inner tube cavity to withstand the ablation of gunpowder under high temperature and high pressure conditions. Therefore, it is necessary to apply a coating film to the inner tube cavity wall of the barrel to improve its corrosion resistance and wear resistance, so as to improve its service life. In addition, in order to achieve high concealment, wear resistance and corrosion and rust prevention, the existing barrel usually needs to be sprayed on its outer surface.

[0003] However, the existing spraying method usually involves hanging a gun barrel on a hanger or plugging it into a workbench, and spraying with a manual handheld spray gun, which can easily lead to uneven thickness of the sprayed coating, and in particular, it is impossible to spray different film layers on the inner and outer walls of the gun barrel at the same time, which reduces the quality of the spraying and the efficiency of the spraying, and cannot meet the needs of large-scale and efficient processing. Utility Model Content

[0004] The utility model aims to provide a gun barrel inner and outer wall coating fixture which can simultaneously perform different types of film coating treatments on the inner and outer wall of the gun barrel to improve coating uniformity and coating efficiency, so as to solve the problems that the existing manual operation mode of gun barrel coating or universal spraying equipment cannot simultaneously perform different film coating treatments on the inner and outer wall of the gun barrel, resulting in poor coating uniformity and low coating efficiency.

[0005] The technical solution adopted by the utility model is: a gun barrel inner and outer wall coating fixture, including a main shell body installed on a support platform to construct a processing chamber, a transmission component capable of directional transmission of pipe fittings is passed through the main shell body, and a plurality of rows of elastic support components capable of supporting and limiting the pipe fittings are arranged at intervals on the transmission component; a lifting and spraying component capable of synchronously coating the inner and outer wall of the pipe fittings limited by the elastic support component can also be lifted and lowered on the inner top surface of the main shell body; a drying component outputting directional dry airflow is also arranged on the inner top surface of the main shell body.

[0006] According to a preferred embodiment, the lifting and spraying assembly includes an upper top strip, a rotary drive unit, a lifting rod, a connecting circular plate, a first output pipe and a second output pipe, wherein the upper top strip is detachably mounted on the inner top surface of the main shell body, and a plurality of the rotary drive units are installed at intervals on the lower surface of the plate body; the output end of the rotary drive unit is connected to the lifting rod, and the connecting circular plate is provided at the axial lower end of the lifting rod; two of the first output pipes are symmetrically installed on the lower plate surface of the connecting circular plate, and the second output pipe is also connected thereto in a coaxial manner.

[0007] According to a preferred embodiment, the first output pipe and the second output pipe are respectively connected to the material bin through a conveying pipe; and a rotating pressing mechanism is also provided on the lower end surface of the connecting circular plate.

[0008] According to a preferred embodiment, the rotary pressing mechanism includes a rotating tube body capable of rotating around its own axis and a fan-shaped cross-section column arranged at the axial lower end of the rotating tube body.

[0009] According to a preferred embodiment, a plurality of first injection holes are vertically spaced apart on the opposite side walls of the two first output pipes; and a plurality of second injection holes are annularly arrayed on the side walls of the second output pipe.

[0010] According to a preferred embodiment, the elastic support assembly includes a strip seat, an elastic support member and a limit support truncated table, wherein a plurality of the strip seats are arranged at intervals on the conveying surface defined by the conveying assembly, and the strip seat is provided with a plurality of mounting grooves spaced apart on its seat body in a manner coaxial with and corresponding to a plurality of the rotary drive units; the elastic support member is arranged in the mounting groove in a manner so as to adjustably limit the position of the limit support truncated table in the mounting groove.

[0011] According to a preferred embodiment, a plurality of open vertical grooves are circumferentially spaced apart on the side surface of the position-limiting support truncated cone, and supporting horizontal bars at least partially laterally inserted into the open vertical grooves are circumferentially spaced apart on the annular edge of the notch of the mounting groove.

[0012] According to a preferred embodiment, the conveying assembly includes a rotating wheel, a supporting inclined rod, a conveyor belt and a conveying rotating motor, wherein the two rotating wheels are symmetrically arranged on both sides of the main shell through the supporting inclined rod, and the conveyor belt passing through the main shell is sleeved on the rotating wheel; the end of the supporting inclined rod supports the conveying rotating motor which is transmission-connected to the rotating wheel.

[0013] According to a preferred embodiment, the drying component includes an air intake fan, an air intake pipe, a heating resistor wire and an exhaust port, wherein the air intake pipe is arranged in a manner of penetrating the top surface of the main shell body, and the air intake fan is arranged in the axial upper end tube cavity of the air intake pipe, the heating resistor wire is arranged in the middle section tube cavity, and the axial lower end of the air intake pipe is connected to the exhaust port.

[0014] According to a preferred embodiment, side openings for the conveyor belt to pass through are arranged on both sides of the main shell.

[0015] The beneficial effects of the utility model are:

[0016] The elastic support assembly provided in the present application can limit the vertically supported state of the pipe fitting by means of an interpolated support limiter, thereby driving the pipe fitting to perform directional translation and complete the coating process. The elastic support assembly can cooperate with the lifting and spraying assembly to limit the upright state of the pipe fitting, and can adjustably expose the complete inner and outer wall surfaces of the pipe fitting, thereby effectively completing the coating of the entire inner and outer walls, and avoiding the blocking of part of the inner wall surface by the interpolated support limiter. The lifting and spraying assembly can synchronously spray the inner and outer walls of the pipe fitting by adjustable periodic lifting and lowering, especially it can improve the uniform and effective full coverage spraying of its inner and outer walls by rotating around the axis during the lifting process, realize the synchronous spraying of the inner and outer walls, thereby improving the quality and efficiency of the spraying. The drying assembly provided in the present application can simultaneously output the annular airflow and the inner column airflow, thereby simultaneously performing heat drying treatment on the inner and outer walls of the pipe fitting, and ensuring the dryness of the output pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a preferred gun barrel inner and outer wall coating fixture proposed by the utility model;

[0018] Figure 2 It is a structural schematic diagram of an elastic support assembly of a preferred gun barrel inner and outer wall coating fixture proposed by the utility model;

[0019] Figure 3 It is a structural schematic diagram of a preferred lifting and spraying assembly of a gun barrel inner and outer wall coating fixture proposed by the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of a lifting spraying assembly of a preferred gun barrel inner and outer wall coating fixture proposed by the utility model.

[0021] Reference numerals list

[0022] 1: support platform; 2: main shell; 3: transmission component; 4: elastic support component; 5: lifting and spraying component; 6: drying component; 21: side port; 31: rotating wheel; 32: supporting diagonal rod; 33: conveyor belt; 34: transmission rotating motor; 41: strip seat; 42: elastic support member; 43: limit support round table; 51: upper top strip plate; 52: rotation drive unit; 53: lifting rod; 54: connecting round plate; 55: first output pipe; 56: second output pipe; 57: conveying pipe; 58: material bin; 59: rotating pressing mechanism; 61: air intake fan; 62: air intake pipe; 63: heating resistor wire; 64: exhaust port; 411: seat body; 412: mounting slot; 413: supporting horizontal bar; 431: opening vertical slot; 551: first injection hole; 561: second injection hole; 591: rotating tube body; 592: fan-shaped section column. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] The technical solution provided by the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0025] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0026] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0027] The following is a detailed description with reference to the accompanying drawings.

[0028] Example 1

[0029] The present application provides a gun barrel inner and outer wall coating fixture, which includes a support platform 1, a main shell 2, a transmission component 3, an elastic support component 4, a lifting spray component 5 and a drying component 6.

[0030] according to Figure 1-4 A specific embodiment is shown, in which a main shell 2 capable of defining a processing chamber is detachably mounted on a support table 1. A conveying assembly 3 capable of directional transmission of pipe fittings is provided in the main shell 2. Multiple rows of elastic support assemblies 4 capable of supporting and limiting the pipe fittings are arranged at intervals on the conveying assembly 3. A lifting spraying assembly 5 capable of simultaneously performing synchronous coating treatment on the inner and outer side walls of the pipe fittings limited by the elastic support assembly 4 can also be provided on the inner top surface of the main shell 2. A drying assembly 6 for outputting directional dry airflow is also provided on the inner top surface of the main shell 2. The conveying assembly 3 provided in the present application can continuously drive the elastic support assembly 4 on the transmission plane defined by it to translate, so that the multiple pipe fittings supported side by side by the elastic support assembly 4 can be adjusted to pass through the shell cavity defined by the main shell 2, so that the pipe fittings supported and limited by the elastic support assembly 4 can pass through the spraying station and the drying station defined by the lifting spraying assembly 5 and the drying assembly 6 respectively in sequence, thereby efficiently completing the inner and outer wall spraying treatment of the pipe fittings. The elastic support assembly 4 provided in the present application can limit the state of the pipe being supported vertically by means of an interpolated support limit, thereby driving the pipe to perform directional translation and complete the coating process. The elastic support assembly 4 can cooperate with the lifting spray assembly 5 to limit the upright state of the pipe, and can adjustably expose the complete inner and outer wall surfaces of the pipe, thereby effectively completing the coating of the entire inner and outer walls, and avoiding the blocking of part of the inner wall surface by the interpolated support limit. The lifting spray assembly 5 can synchronously spray the inner and outer walls of the pipe by adjustable periodic lifting and lowering, especially it can improve the uniform and effective full coverage spraying of its inner and outer walls by rotating around the axis during the lifting process, realize the synchronous spraying of the inner and outer walls, thereby improving the quality and efficiency of the spraying. The drying assembly 6 provided in the present application can simultaneously output the annular airflow and the inner column airflow, thereby simultaneously performing heat drying on the inner and outer walls of the pipe, and ensuring the dryness of the output pipe.

[0031] Preferably, both sides of the main housing 2 are provided with side openings 21 for the conveyor belt 33 to pass through, so that the conveyor assembly 3 can construct a conveying plane capable of driving the pipe fittings to move in and out of the shell cavity of the main housing 2 in a directional manner by driving the conveyor belt 33 to rotate horizontally in a directional manner.

[0032] Preferably, the conveying assembly 3 includes a rotating wheel 31, a supporting inclined rod 32, a conveyor belt 33 and a conveying rotating motor 34. Preferably, the two rotating wheels 31 are symmetrically arranged on both sides of the main shell 2 through the supporting inclined rod 32. Further preferably, a conveyor belt 33 passing through the main shell 2 is sleeved on the rotating wheel 31. Preferably, the end of the supporting inclined rod 32 supports a conveying rotating motor 34 that is transmission-connected to the rotating wheel 31. The conveyor belt 33 provided in the present application can continuously drive the elastic support assembly 4 to perform directional translation, so that multiple rows of pipe fittings can complete the coating process at intervals. The conveying rotating motor 34 provided in the present application can be a stepping intermittent rotating motor, so as to facilitate the periodic translation of the elastic support assembly 4, so that the pipe fittings transferred by the elastic support assembly 4 can be stopped at the spraying station for a certain period of time to complete the spraying process.

[0033] Preferably, the elastic support assembly 4 includes a strip seat 41, an elastic support member 42 and a position-limiting support truncated cone 43. Preferably, a plurality of strip seats 41 are arranged at intervals on the conveying surface defined by the conveying assembly 3. Preferably, the strip seat 41 is provided with a plurality of mounting grooves 412 spaced apart on its seat body 411 in a manner coaxial with and correspondingly arranged with a plurality of rotary drive units 52. Preferably, the elastic support member 42 is arranged in the mounting groove 412 in a manner that adjustably limits the position of the position-limiting support truncated cone 43 in the mounting groove 412. Preferably, a plurality of open vertical grooves 431 are circumferentially spaced apart on the side surface of the position-limiting support truncated cone 43. Further preferably, support cross bars 413 at least partially inserted laterally into the open vertical grooves 431 are circumferentially spaced apart on the edge of the notch annular surface of the mounting groove 412. The position-limiting support truncated platform 43 provided in the present application can be retracted into the installation groove 412 under the pressure of the rotating downward pressing mechanism 59, thereby gradually removing the shielding of the inner wall of the pipe fitting by the inserted pipe fitting, so that the inner wall of the pipe fitting can be fully exposed. The present application provides a plurality of open vertical grooves 431 circumferentially spaced on the side of the position-limiting support truncated platform 43, so that the support horizontal bar 413 partially inserted into the open vertical groove 431 can provide a bottom support structure without shielding the side wall surface of the pipe fitting when the position-limiting support truncated platform 43 is retracted into the installation groove 412, and the setting of the open vertical groove 431 can prevent the lower port of the pipe fitting from being completely closed, so as to facilitate the directional discharge of the hot air flow transported from top to bottom in the inner tube cavity, thereby ensuring the smoothness of the directional flow of the dry air flow inside the pipe fitting. After the spraying process is completed, the lifting spraying assembly 5 rises to release the limit on the pipe and the limit support truncated platform 43, so that the limit support truncated platform 43 rises under the rebound action of the elastic support member 42 (spring), and the pipe is reinserted to perform internal support and position limiting on the pipe. The internal support position limiting is that the limit support truncated platform 43 contacts the inner circle contour line of the end face of the pipe, which only causes air blocking and affects the spraying process, but it does not contact the inner wall surface of the pipe, so that the airflow can effectively contact the entire inner wall surface and complete the drying of the entire inner wall surface.

[0034] Preferably, the lifting spray assembly 5 comprises an upper top strip 51, a rotary drive unit 52, a lifting rod 53, a connecting circular plate 54, a first output pipe 55, a second output pipe 56, a delivery pipe 57, a material bin 58 and a rotary pressing mechanism 59. Preferably, the upper top strip 51 is detachably mounted on the inner top surface of the main housing 2, and a plurality of rotary drive units 52 are installed at intervals on the lower surface of the plate body. Preferably, the output end of the rotary drive unit 52 is connected to the lifting rod 53. Further preferably, the axial lower end of the lifting rod 53 is provided with a connecting circular plate 54. Preferably, two first output pipes 55 are symmetrically installed on the lower plate surface of the connecting circular plate 54. Further preferably, the connecting circular plate 54 is also connected to the second output pipe 56 in a coaxial manner. Preferably, the first output pipe 55 and the second output pipe 56 are respectively connected to the material bin 58 through the delivery pipe 57. Preferably, the lower end surface of the connecting circular plate 54 is also provided with a rotary pressing mechanism 59. Preferably, a high-pressure liquid pump is provided at the port where the material bin 58 and the delivery pipe 57 are connected, so that the material can be output with a certain hydraulic strength to realize the spraying process. Further preferably, a one-way valve that limits the flow direction of the material is provided in the delivery pipe 57. Specifically, at least part of the pipe body of the delivery pipe 57 is passed through the connecting circular plate 54. Preferably, the material bin 58 is detachably mounted on the outside of the fixed length section of the lifting rod 53. Preferably, a plurality of first spray holes 551 are vertically spaced apart on the side walls of the pipe bodies of the two first output pipes 55 facing each other. Preferably, a plurality of second spray holes 561 are arranged in an annular array on the side wall of the pipe body of the second output pipe 56. Further preferably, a nozzle with an air pressure conduction valve is provided in both the first spray hole 551 and the second spray hole 561, so that the material is sprayed out from the nozzle under a specific air pressure state to spray the inner and outer walls of the pipe fitting. Preferably, the rotary pressing mechanism 59 includes a rotating tube body 591 that can rotate around its own axis and a fan-shaped cross-section column 592 that is arranged at the axial lower end of the rotating tube body 591 and matches at least the annular cross-sectional profile of the pipe fitting. Specifically, at least two fan-shaped cross-section columns 592 are arranged symmetrically. The rotating tube body 591 can rotate relative to the connecting circular plate 54 when the fan-shaped cross-section column 592 abuts against the limiting support truncated table 43, so that the first output tube 55 and the second output tube 56 can complete multi-directional dys-position spraying by coaxial rotation, so that the sprayed material can effectively and evenly cover the inner and outer walls of the entire gun barrel, so as to improve the uniformity, efficiency and quality of the coating. The fan-shaped cross-section column 592 can press down the upper end surface of the pipe fitting, so that the rotating tube body 591 and the supporting cross bar 413 cooperate to limit the spraying processing station of the pipe fitting.Specifically, the rotating top surface of the rotating tube body 591 of the present application can abut against the upper end surface of the pipe fitting, and while the sector-shaped cross-section column 592 releases the inner support limit of the pipe fitting by the limit support truncated table 43, the rotating top surface of the rotating tube body 591 can cooperate with the support horizontal bar 413 to form a positioning clamping structure for the upper and lower end surfaces of the pipe fitting, so as to clamp and limit the exposed inner and outer pipe side walls of the pipe fitting. Preferably, the first output pipe 55 and the second output pipe 56 are respectively connected to different material bins 58 through the delivery pipe 57, so as to respectively apply aesthetic and anti-rust paint to the outer wall of the gun barrel and apply functional coating to improve flatness, wear resistance and corrosion resistance to the inner wall of the gun barrel, so as to meet the different requirements of the inner and outer walls of the gun barrel for coating, so as to improve the service life of the gun barrel.

[0035] Preferably, the drying assembly 6 includes an air intake fan 61, an air intake pipe 62, a heating resistor 63 and an exhaust port 64. Preferably, the air intake pipe 62 is arranged in a manner of penetrating the top surface of the main shell 2. Preferably, an air intake fan 61 is arranged in the tube cavity at the axial upper end of the air intake pipe 62. Preferably, a heating resistor 63 is arranged in the tube cavity. Preferably, the axial lower end of the air intake pipe 62 branches off a plurality of branch pipe bodies that can correspond to the arrangement of the mounting grooves 412, and the outlet of the branch pipe body is connected to the exhaust port 64. Preferably, the air outlet end of the exhaust port 64 is provided with an annular opening and a built-in central circular hole opening, so as to simultaneously branch off two hot air flows to perform synchronous hot air flow drying treatment on the inner wall and the outer wall of the pipe fitting.

[0036] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A gun barrel inner and outer wall coating fixture, comprising a main housing (2) mounted on a support platform (1) to form a processing chamber, characterized in that: A conveying assembly (3) capable of directional transmission of pipe fittings is provided in the main housing (2), and multiple rows of elastic support assemblies (4) capable of supporting and limiting the position of the pipe fittings are arranged at intervals on the conveying assembly (3); A lifting spraying assembly (5) capable of simultaneously performing a synchronous coating treatment on the inner and outer side walls of the pipe piece limited by the elastic support assembly (4) is also provided on the inner top surface of the main shell (2) in a lifting manner; A drying component (6) for outputting directional dry airflow is also provided on the inner top surface of the main shell (2).

2. The gun barrel inner and outer wall coating fixture as claimed in claim 1, characterized in that: The lifting spraying assembly (5) comprises an upper top plate (51), a rotation drive unit (52), a lifting rod (53), a connecting circular plate (54), a first output pipe (55) and a second output pipe (56), wherein: The upper strip plate (51) is detachably mounted on the inner top surface of the main housing (2), and a plurality of the rotary drive units (52) are installed at intervals on the lower surface of the plate body; The output end of the rotation driving unit (52) is connected to the lifting rod (53), and the axial lower end of the lifting rod (53) is provided with the connecting circular plate (54); Two first output tubes (55) are symmetrically mounted on the lower plate surface of the connecting circular plate (54), and the second output tube (56) is also connected thereto in a coaxial manner.

3. The gun barrel inner and outer wall coating fixture as claimed in claim 2, characterized in that: The first output pipe (55) and the second output pipe (56) are respectively connected to the material bin (58) through a delivery pipe (57); The lower end surface of the connecting circular plate (54) is also provided with a rotating pressing mechanism (59).

4. The gun barrel inner and outer wall coating fixture as claimed in claim 3, characterized in that: The rotating pressing mechanism (59) comprises a rotating tube body (591) which can rotate around its own axis and a fan-shaped cross-section column (592) arranged at the axial lower end of the rotating tube body (591).

5. The gun barrel inner and outer wall coating fixture as claimed in claim 4, characterized in that: A plurality of first injection holes (551) are vertically spaced apart on the side walls of the tube bodies of the two first output tubes (55) facing each other; A plurality of second injection holes (561) are arranged in an annular array on the side wall of the tube body of the second output tube (56).

6. The gun barrel inner and outer wall coating fixture as claimed in claim 5, characterized in that: The elastic support assembly (4) comprises a strip seat (41), an elastic support member (42) and a position-limiting support truncated table (43), wherein: A plurality of the strip seats (41) are arranged at intervals on the conveying surface defined by the conveying assembly (3); the strip seats (41) are provided with a plurality of installation grooves (412) at intervals on their seat bodies (411) in a manner that they are coaxial with and corresponding to the plurality of the rotation drive units (52); The elastic support member (42) is arranged in the installation groove (412) in a manner to adjustably limit the position of the position-limiting support truncated table (43) in the installation groove (412).

7. The gun barrel inner and outer wall coating fixture as claimed in claim 6, characterized in that: A plurality of open vertical grooves (431) are circumferentially spaced apart on the side surface of the position-limiting support truncated table (43), and support horizontal bars (413) are circumferentially spaced apart on the annular edge of the notch of the mounting groove (412) and are at least partially laterally inserted into the open vertical grooves (431).

8. The gun barrel inner and outer wall coating fixture as claimed in claim 7, characterized in that: The transmission assembly (3) comprises a rotating wheel (31), a supporting inclined rod (32), a transmission belt (33) and a transmission rotating motor (34), wherein: The two rotating wheels (31) are symmetrically arranged on both sides of the main housing (2) through the supporting inclined rods (32), and the conveyor belt (33) inserted in the main housing (2) is sleeved on the rotating wheels (31); The end of the supporting inclined rod (32) supports the transmission rotating motor (34) which is transmission-connected to the rotating wheel (31).

9. The gun barrel inner and outer wall coating fixture as claimed in claim 8, characterized in that: The drying component (6) comprises an air intake fan (61), an air intake pipe (62), a heating resistor (63) and an air exhaust port (64), wherein: The air intake pipe (62) is arranged in a manner of penetrating the top surface of the main housing (2), and the air intake fan (61) is arranged in the tube cavity at the axial upper end of the air intake pipe (62), and the heating resistance wire (63) is arranged in the tube cavity at the middle end thereof. The axial lower end of the air inlet pipe (62) is connected to the exhaust port (64).

10. The gun barrel inner and outer wall coating fixture as claimed in claim 9, characterized in that: Side openings (21) for the conveyor belt (33) to pass through are arranged on both sides of the main shell (2).

Images