An apparatus for arc-spraying the interior wall of a pipe

Abstract

The present application relates to a kind of pipeline inner wall electric arc spraying equipment, including air compressor, spraying power supply, spraying wire roll, fixed seat, spray gun rod and the electric arc spray gun connected to the one end of spray gun rod, the side of fixed seat is provided with drive assembly, tungsten electrode is rotationally arranged on electric arc spray gun, wire guide assembly is arranged on tungsten electrode, drive assembly drives tungsten electrode to rotate in electric arc spray gun, tungsten electrode is guided to shift to the upper end of tungsten electrode by wire guide assembly and is fused in the process of rotation, the side of spray gun rod is provided with pipe clamping assembly, pipe clamping assembly is used to fixedly hold the one end of pipeline and is driven to rotate under the action of drive assembly The pipeline of being clamped;The lower of spray gun rod is also provided with translation support assembly, translation support assembly is assisted to support in the pipeline of rotation and drives the pipeline to be translated along the direction of spray gun rod, wire guide assembly being set up can guide spraying wire material when tungsten electrode rotates, guarantee spraying wire material can and the accurate docking of upper tungsten electrode is fused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric arc spraying, in particular to a pipeline inner wall electric arc spraying equipment. BACKGROUND

[0002] The pipeline is a tool for conveying liquid or gas, and is widely used in various fields of the national economy. However, the inner and outer walls of the pipeline inevitably come into contact with various media, so the inner wall of the pipeline is easily corroded or adhered by various media, which affects the surface quality of the inner wall of the pipeline and greatly shortens the service life of the material. Therefore, it is particularly important to perform corrosion or adhesion prevention treatment on the inner wall of the pipeline.

[0003] A pipeline inner wall electric arc spraying gun is disclosed in a Chinese utility model with publication number CN210252762U, which comprises a front gun body, a rear gun body connected with the front gun body, a tungsten electrode and a clamp. The front gun body has a wire guide hole. The rear gun body is internally provided with an inner hole and a gas outlet hole in communication with the inner hole. The side of the rear gun body is provided with an air inlet hole in communication with the inner hole. The axial direction of the wire guide hole is perpendicular to the axial direction of the gas outlet hole. One end of the clamp is installed in the inner hole, and the other end of the clamp is exposed to the inner hole. The clamp is used to clamp the tungsten electrode, and part of the tungsten electrode extends out of the gas outlet hole. Compressed air flows to the tungsten electrode through the air inlet hole and is sprayed out of the gas outlet hole.

[0004] However, the inventors have found that the electric arc spraying gun has the following problems: the wire feeding mechanism has a long straight-line distance during wire feeding, and the long-time sliding friction between the spraying wire and the wire guide hole during the wire feeding process in the spraying gun rod causes rapid wear of the spraying wire, which affects the normal butt joint of the spraying wire with the tungsten electrode and the spraying quality after heat melting; after the spraying wire extends out of the wire guide hole, the heat melting temperature around the tungsten electrode is high, and the spraying wire is easily bent downward due to high temperature, thereby causing misalignment and affecting the normal butt joint of the spraying wire with the tungsten electrode, and the electric arc spraying gun cannot normally perform electric arc spraying, which affects the quality of the coating and the production efficiency. SUMMARY

[0005] The side of the fixing base is provided with a driving assembly, a tungsten electrode is rotationally arranged on the electric arc spray gun, and a wire guiding assembly is arranged on the tungsten electrode; the driving assembly drives the tungsten electrode to rotate in the electric arc spray gun; the tungsten electrode guides and transfers the spraying wire to the upper end of the tungsten electrode for hot melting through the wire guiding assembly in the rotating process; the side of the spray gun rod is provided with a pipe clamping assembly; the pipe clamping assembly is used for fixing one end of the clamped pipeline and driving the clamped pipeline to rotate synchronously under the action of the driving assembly; the wire guiding assembly can guide the spraying wire well when the tungsten electrode rotates, so that the spraying wire can be accurately connected and hot melted above the tungsten electrode, and the disadvantages that the wire cannot be normally connected in the background art are solved; the driving assembly can drive the wire on the tungsten electrode to rotate synchronously and the pipeline to rotate, so that the inner wall of the pipeline can be sprayed, the production cost is saved, and the quality of the sprayed coating and the production efficiency are improved.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] A pipeline inner wall electric arc spraying equipment, comprising an air compressor, a spraying power supply, a spraying wire roll, a fixing base, a spray gun rod and an electric arc spray gun connected to one end of the spray gun rod, wherein the side of the fixing base is provided with a driving assembly, the electric arc spray gun is rotationally provided with a tungsten electrode, the tungsten electrode is provided with a wire guiding assembly, the driving assembly drives the tungsten electrode to rotate in the electric arc spray gun, the tungsten electrode guides and transfers the spraying wire to the upper end of the tungsten electrode for hot melting through the wire guiding assembly in the rotating process, the side of the spray gun rod is provided with a pipe clamping assembly matched therewith, and the pipe clamping assembly is used for fixing one end of the clamped pipeline and driving the clamped pipeline to rotate synchronously under the action of the driving assembly; the lower side of the spray gun rod is further provided with a translation supporting assembly, and the translation supporting assembly assists in supporting the pipeline in rotation and drives the pipeline to translate along the direction of the spray gun rod.

[0008] As a preferred, the electric arc spray gun is provided with an air inlet, an air outlet nozzle and a tungsten electrode clamping piece, the tungsten electrode is rotationally arranged in the tungsten electrode clamping piece, the lower side of the tungsten electrode clamping piece is provided with an insulating block matched with the tungsten electrode, the insulating block is made of insulating high-temperature resistant material and plays an insulating and heat insulation role, and the air outlet nozzle is obliquely arranged towards the tungsten electrode direction.

[0009] As a preferred, the lower end of the tungsten electrode is fixedly provided with a transmission ring a, the driving assembly comprises a motor and a first transmission rod driven by the motor, the top end of the first transmission rod is provided with a transmission ring b matched with the transmission ring a, and a belt a is further connected between the transmission ring a and the transmission ring b.

[0010] As a kind of preferred, the wire guide assembly includes the insulating ring arranged on the tungsten electrode, the insulating ring is provided with the wire guide groove around upward, the wire guide groove is fixedly provided with the matched guide groove, the guide groove is sleeved on the tungsten electrode, the insulating ring and guide groove are made of insulating high-temperature material.

[0011] As a kind of preferred, the pipe clamping assembly includes bottom plate and the rotating seat a fixedly arranged on bottom plate, the rotating seat a is rotatably provided with rotating main shaft, the rotating main shaft is telescopically provided with rotating secondary shaft, one side of the rotating secondary shaft is fixedly connected with pipe clamping seat, the pipe clamping seat is provided with a plurality of adjustment grooves in circumferential array, the pipe clamping block is slidably arranged in the adjustment groove, the tail end of the pipe clamping block is connected with the locking bolt matched with the adjustment groove, the pipe clamping block has different types of matching sizes according to different diameters of pipe.

[0012] As a kind of preferred, the bottom plate is fixedly provided with rotating seat b, the rotating seat b is rotatably provided with second transmission rod, the top end of the second transmission rod is fixedly connected with first bevel gear, the rotating main shaft is fixedly connected with second bevel gear matched with the first bevel gear, the first transmission rod and the second transmission rod are respectively provided with transmission ring c and transmission ring d matched with each other, the transmission ring c and the transmission ring d are further connected with belt b.

[0013] As a kind of preferred, the translation support assembly includes a pair of linear guides arranged on the bottom plate, and a pair of linear sliders a and a pair of linear sliders b slidably arranged on the linear guides, the linear sliders a and the linear sliders b are respectively fixedly provided with bearing strips a and bearing strips b at the upper ends, the bearing strips a and the bearing strips b are respectively fixedly connected with nut seats a and nut seats b at the bottom ends, one side of the bottom plate is further fixedly provided with a servo motor and a lead screw driven by the servo motor, the lead screw is arranged in the nut seats a and the nut seats b, and the lead screw is further provided with a first fixed seat and a second fixed seat on the bottom plate at both ends.

[0014] As another preferred, the bearing strips a and the bearing strips b are respectively fixedly provided with a pair of extension rods a and a pair of extension rods b, the extension rods a and the extension rods b are rotatably provided with support rollers therebetween, the support rollers are matched with the pipes, and the support rollers are provided with anti-skid layers on the surfaces to increase the friction with the outer walls of the pipes and prevent the pipes from slipping during translation.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The fixed seat of the application is provided with a driving assembly on one side, a tungsten electrode is rotatably arranged on the electric arc spraying gun, a wire leading assembly is arranged on the tungsten electrode, the driving assembly drives the tungsten electrode to rotate in the electric arc spraying gun, the tungsten electrode guides and transfers the spraying wire to the upper end of the tungsten electrode for hot melting through the wire leading assembly during rotation, a pipe clamping assembly is arranged on one side of the spraying gun rod, the pipe clamping assembly is used for fixing one end of the clamped pipeline and synchronously drives the clamped pipeline to rotate under the action of the driving assembly, the automation degree of the equipment is improved through the cooperation between the above-mentioned assemblies, the wire leading assembly can well guide the spraying wire during the rotation of the tungsten electrode, and it is ensured that the spraying wire can be accurately butt-jointed and hot-melted above the tungsten electrode, the defects that the wire cannot be normally butt-jointed in the background art are solved, and the driving assembly can synchronously drive the wire rotation and the pipeline rotation to cooperate with the spraying gun to spray the inner wall of the pipeline, the linkage between the two is cleverly realized through the setting of one power, the production cost is saved, and the quality and production efficiency of the sprayed coating are improved.

[0017] 2. The insulation ring of the tungsten electrode is provided with a wire leading groove facing upwards, a guide groove sleeved on the tungsten electrode is fixedly arranged above the wire leading groove, the spraying wire is preliminarily positioned and guided by being wound in the wire leading groove, the tungsten electrode drives the wire to continuously wind and guides the spraying wire extending out of the wire leading groove into the guide groove, the guide groove limits and guides the spraying wire to approach the upper end of the tungsten electrode, and the spraying wire extending out of the guide groove is fixedly butt-jointed with the tungsten electrode to realize hot melting, the continuously pulled-out spraying wire can be realized through the rotating tungsten electrode and the wire leading groove, the guide spraying wire can be realized through the wire leading groove and the fixedly arranged guide groove to approach the upper end of the tungsten electrode to realize fixed butt joint and hot melting, the design structure is clever, the wire pulling and guiding effect is good, and the accurate and continuous operation of electric arc spraying is facilitated.

[0018] 3. The pipe clamping seat is provided with an adjusting groove, and a pipe clamping block is slidably arranged in the adjusting groove; according to different diameters of the pipeline, the pipe clamping block matched with the pipeline can be installed in the adjusting groove; after clamping is completed, the pipe clamping block is locked in the position in the adjusting groove by a locking bolt to stably clamp the pipeline to cooperate with rotary spraying; the design structure is simple, and can be suitable for clamping and rotating the pipelines with different diameters, thereby increasing the applicability and multifunctionality of the equipment.

[0019] In summary, the pipeline inner wall electric arc spraying equipment has the advantages of clever design, simple structure, efficient and safe use, and is especially suitable for the field of electric arc spraying technology. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the technical solutions of the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings described below are only some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 Structure diagram of the pipe inner wall electric arc spraying equipment;

[0022] Figure 2 Structure diagram of the electric arc spraying gun;

[0023] Figure 3 Structure diagram of the wire feeding assembly;

[0024] Figure 4 Structure diagram of the driving assembly;

[0025] Figure 5 Structure diagram of the pipe clamping assembly;

[0026] Figure 6 Structure diagram of Figure 5 Enlarged structure diagram of A in

[0027] Figure 7 Structure diagram of the translation support assembly;

[0028] Figure 8 Structure diagram of the support roller;

[0029] Figure 9 State diagram of the wire feeding assembly guiding the spraying wire. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0031] Embodiment one

[0032] As Figures 1 to 9As shown, a pipeline inner wall arc spraying device comprises an air compressor 1, a spraying power supply 2, a spraying wire roll 3, a fixing seat 4, a spraying gun rod 5, and an arc spraying gun 6 connected to one end of the spraying gun rod 5. One side of the fixing seat 4 is provided with a driving assembly 7. A tungsten electrode 8 is rotatably arranged on the arc spraying gun 6. A wire guiding assembly 9 is arranged on the tungsten electrode 8. The driving assembly 7 drives the tungsten electrode 8 to rotate in the arc spraying gun 6. In the rotating process, the wire guiding assembly 9 guides and transfers the spraying wire 301 to the upper end of the tungsten electrode 8 for hot melting. One side of the spraying gun rod 5 is provided with a matched pipe clamping assembly 10. The pipe clamping assembly 10 is used for fixing and clamping one end of a pipeline 11 and driving the clamped pipeline 11 to rotate under the action of the driving assembly 7. The lower side of the spraying gun rod 5 is further provided with a translation supporting assembly 12. The translation supporting assembly 12 assists in supporting the rotating pipeline 11 and drives the pipeline 11 to translate along the direction of the spraying gun rod 5.

[0033] Here, one side of the fixing seat is provided with the driving assembly 7. The tungsten electrode 8 is rotatably arranged on the arc spraying gun 6. The wire guiding assembly 9 is arranged on the tungsten electrode 8. The driving assembly 7 drives the tungsten electrode 8 to rotate in the arc spraying gun 6. In the rotating process, the wire guiding assembly 9 guides and transfers the spraying wire 301 to the upper end of the tungsten electrode 8 for hot melting. One side of the spraying gun rod 5 is provided with the pipe clamping assembly 10. The pipe clamping assembly 10 is used for fixing and clamping one end of the pipeline 11 and driving the clamped pipeline 11 to rotate under the action of the driving assembly 7. Through the cooperation between the above components, the automation degree of the device is improved. The wire guiding assembly 9 arranged on the tungsten electrode 8 can guide the spraying wire 301 when the tungsten electrode 8 rotates, ensuring that the spraying wire 301 can be accurately connected and hot-melted with the upper tungsten electrode 8, solving the problem that the wire cannot be normally connected in the background technology. At the same time, the driving assembly 7 can drive the wire on the tungsten electrode 8 to rotate and the pipeline 11 to rotate, cooperating with the spraying gun to spray the inner wall of the pipeline. Through the setting of one power, the linkage between the two is realized, the production cost is saved, and the quality of the sprayed coating and the production efficiency are improved.

[0034] Further, the arc spraying gun 6 is provided with an air inlet 601, an air outlet blow nozzle 602, and a tungsten electrode clamping piece 603. The tungsten electrode 8 is rotatably arranged in the tungsten electrode clamping piece 603. The lower side of the tungsten electrode clamping piece 603 is provided with an insulation block 604 matched with the tungsten electrode 8.

[0035] Further, the lower end of the tungsten electrode 8 is fixedly provided with a transmission ring a801, the driving assembly 7 comprises a motor 701 and a first transmission rod 702 driven by the motor 701, and the top end of the first transmission rod 702 is provided with a transmission ring b703 matched with the transmission ring a801, and a belt a704 is further connected between the transmission ring a801 and the transmission ring b703.

[0036] Further, the wire drawing assembly 9 comprises an insulating ring 901 arranged on the tungsten electrode 8, the insulating ring 901 is provided with an upward wire drawing groove 902, and a matched guide groove 903 is fixedly arranged above the wire drawing groove 902, and the guide groove 903 is sleeved on the tungsten electrode 8.

[0037] It should be pointed out that the insulating ring 901 arranged on the tungsten electrode 8 is provided with the upward wire drawing groove 902, and the guide groove 903 sleeved on the tungsten electrode 8 is fixedly arranged above the wire drawing groove 902, the spraying wire 301 is preliminarily positioned and guided by being wound in the wire drawing groove 902, the tungsten electrode 8 is rotated to drive the wire to continuously wind and guide and transfer the spraying wire 301 extending out of the wire drawing groove 902 into the guide groove 903, the guide groove 903 limits and guides the spraying wire to be close to the upper end of the tungsten electrode, the spraying wire 301 extending out of the guide groove 903 is fixedly connected with the tungsten electrode 8 to realize heat melting, the rotating tungsten electrode 8 and the wire drawing groove 902 can continuously pull out the spraying wire 301, and the wire drawing groove 902 and the fixedly arranged guide groove 903 can guide the spraying wire 301 to be close to the upper end of the tungsten electrode to realize fixed connection and heat melting, the design structure is ingenious, the wire drawing and guiding effect is good, and the accurate and continuous operation of the electric arc spraying is facilitated.

[0038] Further, the pipe clamping assembly 10 comprises a bottom plate 1001 and a rotating seat a1002 fixedly arranged on the bottom plate 1001, a rotating main shaft 1003 is rotatably arranged on the rotating seat a1002, a rotating auxiliary shaft 1004 is telescopically arranged on the rotating main shaft 1003, a pipe clamping seat 1005 is fixedly connected to one side of the rotating auxiliary shaft 1004, a plurality of adjusting grooves 1006 are arranged in a circumferential array on the pipe clamping seat 1005, a pipe clamping block 1007 is slidably arranged in the adjusting groove 1006, and a locking bolt 1008 matched with the adjusting groove 1006 is connected to the tail end of the pipe clamping block 1007.

[0039] It should be pointed out that the present application is provided with adjusting groove 1006 on the pipe clamp seat, the pipe clamp block 1007 is slidably arranged in the adjusting groove 1006, according to the pipe 11 of different diameter, the pipe clamp block 1007 matched can be installed in the adjusting groove, after clamping, the position of pipe clamp block 1007 in adjusting groove 1006 is locked by locking bolt 1008, the pipe 11 is stably fixed and clamped to cooperate with the rotary spraying, the design structure is simple, and it can be applicable to different diameter pipe 11 to clamp and rotate, increase the applicability and multifunction of the equipment.

[0040] Further, the bottom plate 1001 is fixedly provided with a rotating seat b1009, the rotating seat b1009 is rotatably provided with a second transmission rod 1010, the top end of the second transmission rod 1010 is fixedly connected with a first bevel gear 1011, the rotating main shaft 1003 is fixedly connected with a second bevel gear 1012 engaged with the first bevel gear 1011, the first transmission rod 702 and the second transmission rod 1010 are respectively provided with a transmission ring c705 and a transmission ring d1013 matched with each other, and the transmission ring c705 and the transmission ring d1013 are further connected with a belt b1014.

[0041] Further, the translation support assembly 12 comprises a pair of linear guides 1201 arranged on the bottom plate 1001 and a pair of linear slides a1202 and a pair of linear slides b1203 slidably arranged on the linear guides 1201, the linear slides a1202 and the linear slides b1203 are respectively fixedly provided with a bearing strip a1204 and a bearing strip b1205 at the upper end, the bottom ends of the bearing strip a1204 and the bearing strip b1205 are respectively fixedly connected with a nut seat a1206 and a nut seat b1207, one side of the bottom plate 1001 is further fixedly provided with a servo motor 1208 and a lead screw 1209 driven by the servo motor 1208, the lead screw 1209 is arranged in the nut seat a1206 and the nut seat b1207, and the lead screw 1209 is further provided with a first fixed seat 1210 and a second fixed seat 1211 on the bottom plate 1001 at both ends.

[0042] Example two

[0043] As Figure 7 And Figure 8As shown in the figure, the same or corresponding parts as in Example One are denoted by the same reference numerals, and for the sake of brevity, only the differences from Example One are described below; the difference between this Example Two and Example One is that a pair of extension rods a 1212 and a pair of extension rods b 1213 are fixedly arranged on the carrier strip a 1204 and the carrier strip b 1205 respectively, and a support roller 1214 is rotatably arranged between the extension rods a 1212 and the extension rods b 1213, and the support roller 1214 is in close contact with the pipe 11.

[0044] The support roller 1214 in this example assists in supporting the pipe 11 in rotation, and under the action of the servo motor 1208 and the lead screw 1209, drives the pipe 11 to translate in the direction of the spray gun rod 5.

[0045] The working process is as follows:

[0046] The motor 701 rotates to synchronously rotate the tungsten electrode 8 in the tungsten electrode clamping piece 603 through the belt a 704, the tungsten electrode 8 rotates to guide and wind the spraying wire 301 through the wire guiding groove 902 on the insulating ring 901 and the fixedly arranged guide groove 903, the spraying wire 301 after extending out of the guide groove 903 precisely abuts against the upper end of the tungsten electrode 8 for hot melt fit, the electric arc spray gun 6 sprays the inner wall of the pipe 11, the motor 701 rotates to rotate the second transmission rod 1010 through the belt b 1014, the first bevel gear 1011 at the top of the second transmission rod 1010 drives the second bevel gear 1012 meshing therewith to rotate, the rotation of the second bevel gear 1012 drives the pipe clamping seat 1005 on the rotating pair shaft 1004 to rotate, the pipe clamping block 1007 is locked on the pipe clamping seat 1005 through the locking bolt 1008 to fixedly clamp and synchronously rotate the pipe 11, the pipe 11 in rotation is sprayed all around by the electric arc spray gun 6, at the same time, the servo motor 1208 drives the lead screw 1209 to rotate in the first fixed seat 1210 and the second fixed seat 1211, the rotation of the lead screw 1209 drives the carrier strip a 1204 and the carrier strip b 1205 to translate on the linear guide rail 1201, the support roller 1214 arranged on the carrier strip a 1204 and the carrier strip b 1205 assists in supporting the pipe 11 in rotation, and drives the rotating pair shaft 1004 to pull out from the rotating main shaft 1003 in the process of translation of the carrier strip, the support roller 1214 supports the pipe 11 to translate along the direction of the spray gun rod 5, and the electric arc spray gun 6 sprays the pipe 11 in the length direction.

[0047] In the description of the present application, it needs to be understood that the terms "front", "rear", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0048] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art under the technical hints of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pipeline inner wall arc spraying device, comprising an air compressor (1), a spraying power supply (2), a spraying wire roll (3), a fixing seat (4), a spraying gun rod (5), and an arc spraying gun (6) connected to one end of the spraying gun rod (5), characterized in that, One side of the fixed seat (4) is provided with a driving assembly (7), the electric arc spraying gun (6) is rotatably provided with a tungsten electrode (8), the tungsten electrode (8) is provided with a wire leading assembly (9), the driving assembly (7) drives the tungsten electrode (8) to rotate in the electric arc spraying gun (6), the tungsten electrode (8) is guided and transferred to the upper end of the tungsten electrode (8) by the wire leading assembly (9) during rotation to melt, one side of the spraying gun rod (5) is provided with a matched pipe clamping assembly (10), the pipe clamping assembly (10) is used for fixing one end of the pipe (11) and driving the clamped pipe (11) to rotate under the action of the driving assembly (7); The lower side of the spraying gun rod (5) is also provided with a translation supporting assembly (12), the translation supporting assembly (12) assists the support of the rotating pipe (11) and drives the pipe (11) to translate along the direction of the spraying gun rod (5); The electric arc spraying gun (6) is provided with an air inlet (601), an air outlet blow nozzle (602) and a tungsten electrode clamping piece (603), the tungsten electrode (8) is rotatably arranged in the tungsten electrode clamping piece (603), and an insulating block (604) matched with the tungsten electrode (8) is arranged below the tungsten electrode clamping piece (603); The lower end of the tungsten electrode (8) is fixedly provided with a transmission ring a (801), the driving assembly (7) comprises a motor (701) and a first transmission rod (702) driven by the motor (701), and the top end of the first transmission rod (702) is provided with a transmission ring b (703) matched with the transmission ring a (801); The transmission ring a (801) and the transmission ring b (703) are further connected with a belt a (704); The wire leading assembly (9) comprises an insulating ring (901) arranged on the tungsten electrode (8), the insulating ring (901) is provided with an upward wire leading groove (902) around the insulating ring (901), and the wire leading groove (902) is provided with a matched guide groove (903) fixedly arranged above the wire leading groove (902); The guide groove (903) is sleeved on the tungsten electrode (8); The pipe clamping assembly (10) comprises a bottom plate (1001) and a rotating seat a (1002) fixedly arranged on the bottom plate (1001), a rotating main shaft (1003) is rotatably arranged on the rotating seat a (1002), a rotating auxiliary shaft (1004) is telescopically arranged on the rotating main shaft (1003), a pipe clamping seat (1005) is fixedly connected to one side of the rotating auxiliary shaft (1004), a plurality of adjusting grooves (1006) are arranged in a circumferential array on the pipe clamping seat (1005), a pipe clamping block (1007) is slidably arranged in the adjusting groove (1006), and a locking bolt (1008) matched with the adjusting groove (1006) is connected to the tail end of the pipe clamping block (1007). The bottom plate (1001) is fixedly provided with a rotating seat b (1009), the rotating seat b (1009) is rotatably provided with a second transmission rod (1010), the top end of the second transmission rod (1010) is fixedly connected with a first bevel gear (1011), the rotating main shaft (1003) is fixedly connected with a second bevel gear (1012) engaged with the first bevel gear (1011), the first transmission rod (702) and the second transmission rod (1010) are respectively provided with a transmission ring c (705) and a transmission ring d (1013) matched with each other, and the transmission ring c (705) and the transmission ring d (1013) are further connected with a belt b (1014).

2. A pipeline internal wall electric arc spraying apparatus according to claim 1, characterised in that, The translation support assembly (12) comprises a pair of linear guides (1201) arranged on the bottom plate (1001) and a pair of linear sliders a (1202) and a pair of linear sliders b (1203) slidingly arranged on the linear guides (1201), the linear sliders a (1202) and the linear sliders b (1203) are respectively fixedly provided with a bearing strip a (1204) and a bearing strip b (1205) at the upper end, the bottom ends of the bearing strip a (1204) and the bearing strip b (1205) are respectively fixedly connected with a nut seat a (1206) and a nut seat b (1207), one side of the bottom plate (1001) is further fixedly provided with a servo motor (1208) and a lead screw (1209) driven by the servo motor (1208), the lead screw (1209) is arranged in the nut seat a (1206) and the nut seat b (1207), and the lead screw (1209) is further provided with a first fixed seat (1210) and a second fixed seat (1211) on the bottom plate (1001).

3. A pipeline internal wall electric arc spraying apparatus according to claim 2, characterised in that, The bearing strip a (1204) and the bearing strip b (1205) are respectively fixedly provided with a pair of extension rods a (1212) and a pair of extension rods b (1213), the extension rods a (1212) and the extension rods b (1213) are rotatably provided with a supporting roller (1214), and the supporting roller (1214) is attached to the pipeline (11).

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