CN114161277A

CN114161277A - Pipe fitting welding seam equipment of polishing

Info

Publication number: CN114161277A
Application number: CN202111505218.9A
Authority: CN
Inventors: 王培良; 金建忠; 许宇翔; 郝利峰; 蔡志端
Original assignee: Huzhou Jinye Surface Technology Co ltd; Huzhou University
Current assignee: Huzhou Jinye Surface Technology Co ltd; Huzhou University
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-03-11

Abstract

The invention provides a pipe fitting welding seam polishing device which is characterized by comprising the following components: the polishing assemblies are distributed at the inner end and the outer end of the polishing piece; the detection unit is arranged at the fixed end of the polishing assembly; the fixing unit is arranged on the side part of the detection unit; after the position of a welding seam is found by the detection unit in the rotating process of the grinding piece, the grinding piece is locked by the fixing unit, and the grinding piece is formed into a grinding surface with smooth inside and outside in a mode that the grinding assembly swings and grinds, the arc length between the first prediction assembly and the second prediction assembly is equal to the effective length of the rack, so that when the reverse wedge-shaped plate is inserted into the welding seam, the first grinding roller and the second grinding roller just contact the upper end surface and the lower end surface of the grinding piece, and the welding seam position of the grinding piece can be automatically detected.

Description

Pipe fitting welding seam equipment of polishing

Technical Field

The invention relates to the technical field of grinding of reel pipe weld joints, in particular to pipe fitting weld joint grinding equipment.

Background

After the metal iron sheet is wound into a tubular shape, welding forming is required, however, a rough welding seam is formed at the welding position, and in order to smooth the welding seam, polishing treatment is usually required to be performed on the welding seam, so that the surface of the processed metal tube is smoother and more beautiful.

Chinese patent CN 113458903A discloses a steel container surface arc-shaped welding line polishing device, belonging to the technical field of welding line polishing, wherein a worm is meshed and connected between two symmetrical worm gears, so that the worm can drive the left and right worm gears to synchronously rotate relatively when rotating, the positions of the two lower roller columns I are adjusted, a screw rod and a screw sleeve which are in threaded connection are arranged, and the bottom of the screw rod and the worm are fixedly connected, when the two lower roller columns I move relatively to the middle position for adjustment, the upper roller column II can move upwards to form stable support for a transmission belt, and the bottom of the transmission belt can be adjusted to be arc-shaped by matching with a lift formed by pressing of an arc-shaped welding line, and is tightly attached to the arc-shaped welding line, so that when sand paper is used for polishing the outer surface of the arc-shaped welding line, the angle does not need to be adjusted repeatedly when moving, the polishing efficiency and the polishing precision are improved, and the labor intensity of workers is conveniently reduced.

But among this technical scheme only can polish the bellying of arc welding seam at the in-process of polishing, can not realize polishing simultaneously bellying and the concave part of welding seam, and the scope of the face of polishing is less, needs the piece of polishing of the upset that the in-process was polished repeatedly at every turn, and the operation is complicated, because curved welding seam is at the polishing in-process, is difficult to the location, leads to polishing the in-process and easily appears polishing a position and change, and the precision of polishing is low continuously.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides pipe welding seam polishing equipment.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a pipe fitting welding seam equipment of polishing which characterized in that includes:

the polishing assemblies are distributed at the inner end and the outer end of the polishing piece;

the detection unit is arranged at the fixed end of the polishing assembly;

the fixing unit is arranged on the side part of the detection unit;

after the grinding piece finds the position of the welding line by using the detection unit in the rotating process, the grinding piece is locked in position by the fixing unit, and an inner and outer smooth grinding surface is formed in the mode that the grinding assembly swings and grinds.

As a refinement, the grinding assembly comprises:

a first grinding roller;

and the second grinding roller is arranged at the lower part of the first grinding roller.

As a refinement, the first grinding roller comprises:

a first wobble plate;

the first driving roller is rotatably connected inside the first swinging plate;

the two groups of supporting plates are rotatably connected to the side part of the first swinging plate in the same horizontal plane;

the main fine adjustment teeth are connected to the side part of the first swing disc;

the outer grinding belt forms a regular triangle shape under the action of the supporting plate and the first driving roller.

As a refinement, the second grinding roller comprises:

a second wobble plate;

the second driving roller is rotatably connected to the side part of the second swinging plate;

the inner polishing belt is sleeved on the second driving roller to form an inverted triangle;

the driven fine adjustment teeth are connected to one side, opposite to the second driving roller, of the second swing disc;

the first driving roller and the second driving roller are positioned on the same vertical line;

the main fine-adjustment teeth are meshed with the auxiliary fine-adjustment teeth.

As an improvement, the detection unit includes:

a support member;

the first prediction component is arranged on the side part of the supporting component;

and the second prediction component is arranged on the side part of the supporting part and is positioned on the same horizontal plane with the uppermost end of the grinding part.

As an improvement, the first prediction assembly comprises a first elastic guide rail, and a forward wedge-shaped plate is inserted in the first elastic guide rail in a sliding manner;

the second prediction component comprises a second elastic guide rail, and a balance rod is inserted in the second elastic guide rail in a sliding manner;

the middle of the side part of the balancing rod is connected with a reverse wedge-shaped plate;

the oblique angle directions of the forward wedge-shaped plate and the reverse wedge-shaped plate are opposite.

As an improvement, the inside of the supporting part is connected with a lifting mechanism in a sliding manner, the lifting mechanism also comprises a lifting rod connected to the side part of the lifting mechanism, a guide groove is arranged inside the lifting rod, and an adjusting rod is connected inside the guide groove in a sliding manner;

an air cylinder is arranged in the supporting part and positioned at the side part of the adjusting rod, and a telescopic block used for controlling the position of the adjusting rod is connected in the air cylinder in a sliding manner;

the lower part of the adjusting rod is connected with a rack.

As an improvement, the fixing unit includes:

an inflation conduit;

the first control valve is used for controlling the gas motion state of the inflation pipeline and penetrates through the inflation pipeline;

the air outlet hole is used for connecting the air outlet hole for discharging the air in the fixing unit to the side part of the inflation pipeline;

the second control valve is used for controlling the air outlet and penetrates through the air outlet;

an expansion mechanism, one end of the expansion mechanism and the side part of the detection unit.

As a refinement, the expansion mechanism comprises:

a gas storage tank;

the guide sleeves are provided with three groups and are all annularly arranged on the outer side of the gas storage tank;

and a top block is inserted in the guide sleeve in a sliding manner.

As an improvement, the lower end of the fixing unit is provided with an adjusting unit, and the adjusting unit comprises:

a limiting component;

the four groups of supporting blocks are arranged and distributed on two sides of the limiting component;

and the opening at the upper end of the gas distribution pipe is communicated with the inflation pipeline, and the lower end of the gas distribution pipe is communicated with the limiting component.

The invention has the beneficial effects that:

1. according to the invention, the arc length between the first prediction component and the second prediction component is equal to the effective length of the rack, so that when the reverse wedge-shaped plate is inserted into the welding seam, the first grinding roller and the second grinding roller just contact the upper end surface and the lower end surface of the grinding piece, and the welding seam position of the grinding piece can be automatically detected.

2. According to the invention, the air distributing pipe enters the limiting assembly, and the limiting block is pushed to compress the supporting spring to move upwards, so that the fixed polishing piece is limited left and right, the polishing piece is positioned in an omnibearing positioning mode, and the polishing precision is prevented from being low due to the fact that the polishing piece deviates in the polishing process.

3. According to the invention, the first swing disc and the second swing disc synchronously rotate, so that the polishing track of the polishing piece by the outer polishing belt and the inner polishing belt is changed into a surface polishing track from a line polishing track, the polishing range is wide, and the positioning deviation caused by repeatedly switching the positioned polishing piece is avoided.

4. According to the invention, the inflation pipeline is closed through the first control valve, and the air outlet is opened through the second control valve, so that the gas in the gas storage tank and the limiting assembly flows back and is sprayed out from the air outlet, and the polishing debris left at the polishing assembly is blown out, thereby avoiding the influence of the debris on subsequent polishing.

In conclusion, the invention has the advantages that the internal and external grinding are synchronously carried out, the grinding position is controlled by adjusting the angle of the grinding roller, a grinding mode of forming a surface by a line is formed, the positioning deviation caused by repeatedly switching the positioned grinding piece is avoided, the position of a welding line can be automatically detected before each grinding, the automatic grinding is realized, the grinding precision is high, and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of the present invention showing the removal of a polishing member;

FIG. 4 is a diagram of the connection between the inspection unit and the polishing assembly according to the present invention;

FIG. 5 is a diagram of the engagement of a support member with a second prediction module in accordance with the present invention;

FIG. 6 is a diagram showing the relationship between the fixing unit and the detecting unit;

FIG. 7 is a diagram of the engagement of the transmission unit and the adjustment unit of the present invention;

FIG. 8 is an elevational partial cross-sectional view of the present invention;

FIG. 9 is a schematic structural view of the lifting mechanism of the present invention;

FIG. 10 is a schematic view showing an internal structure of a fixing unit according to the present invention;

FIG. 11 is an elevational, full sectional view of the present invention;

fig. 12 is an enlarged view of the invention at a in fig. 11.

In the figure; 1. polishing the assembly; 2. a detection unit; 3. a transmission unit; 4. a fixing unit; 5. an adjustment unit; 101. a first grinding roller; 1011. a first wobble plate; 1012. a first driving roller; 1013. an outer sanding belt; 1014. a support plate; 1015. a main fine adjustment tooth; 102. a second grinding roller; 1021. a second wobble plate; 1022. a second driving roller; 1023. an inner sanding belt; 1024. a secondary fine-tuning tooth; 201. a support member; 202. a first prediction component; 2021. a first elastic guide rail; 2022. a forward wedge plate; 203. a second prediction component; 2031. a second elastic guide rail; 2032. a balancing pole; 2033. a reverse wedge plate; 204. a lifting mechanism; 2041. a lifting rod; 20411. a guide groove; 2042. sleeving blocks; 2043. adjusting a rod; 2044. a rack; 2045. a reset mechanism; 205. a cylinder; 2051. a telescopic block; 301. a drive assembly; 3011. a drive motor; 3012. a rotating roller; 3013. a sprocket assembly; 3014. a helical gear; 401. an air pump; 402. an inflation conduit; 403. a first control valve; 4031. a first baffle plate; 40311. a first air hole; 4032. a first return spring; 404. a second control valve; 4041. a second baffle; 4042. a second return spring; 4043. a second air hole; 405. a top block; 4051. a third return spring; 406. an expansion mechanism; 4061. a gas storage tank; 4062. a guide sleeve; 407. an air outlet; 501. A limiting component; 5011. a carrying tray; 5012. a limiting block; 5013. a support spring; 502. a support block; 5021. turning over the roller; 503. a gas distributing pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example one

As shown in fig. 1-2, a pipe welding seam grinding apparatus includes:

the polishing components 1 are distributed at the inner end and the outer end of the polishing piece;

the detection unit 2 is arranged at the fixed end of the polishing component 1;

the fixing unit 4 is arranged on the side part of the detection unit 2, and the fixing unit 4 is arranged on the side part of the detection unit 2;

after the grinding part utilizes the detection unit 2 to find the position of the welding line in the rotating process, the grinding part is locked in position through the fixing unit 4, and an inner and outer smooth grinding surface is formed in the grinding mode of the grinding assembly 1 in a swinging and grinding mode.

As a refinement, as shown in fig. 2 to 6, the sanding assembly 1 comprises:

a first sanding roller 101;

and the second grinding roller 102, wherein the second grinding roller 102 is arranged at the lower part of the first grinding roller 101.

Further, the first grinding roller 101 includes:

a first wobble plate 1011;

a first driving roller 1012, wherein the first driving roller 1012 is rotatably connected inside a first swinging disk 1011;

the two groups of support plates 1014 are rotatably connected to the side part of the first swinging plate 1011 in the same horizontal plane;

a main fine-tuning tooth 1015, wherein the main fine-tuning tooth 1015 is connected to the side of the first swinging disk 1011;

and an outer sanding belt 1013 formed in a regular triangle shape by the support plate 1014 and the first driving roller 1012.

Further, the second grinding roller 102 includes:

a second wobble plate 1021;

the second driving roller 1022 is rotatably connected to the side part of the second wobble plate;

an inner polishing belt 1023, wherein the inner polishing belt 1023 is sleeved on the second driving roller 1022 to form an inverted triangle;

a slave fine-tuning tooth 1024, the slave fine-tuning tooth 1024 being connected to a side of the second wobble plate 1021 opposite to the second driving roller 1022;

the first driving roller 1012 and the second driving roller 1022 are on the same vertical line;

the master fine tune teeth 1015 mesh with the slave fine tune teeth 1024.

It should be added that the end portions of the first driving roller 1012 and the second driving roller 1022 are both provided with driving motors, and the end portion of the second swing disk 1012, which is located at the supporting member 201, is provided with a mechanism capable of automatically aligning the second swing disk 1012 after being separated from the first swing disk 1011, and this aligning mechanism preferably adopts a torsion spring.

As a modification, as shown in fig. 5 to 9, the detecting unit 2 includes:

a support member 201;

a first prediction component 202, wherein the first prediction component 202 is arranged on the side of the supporting component 201;

and the second prediction component 203 is arranged on the side part of the supporting component 201, and the second prediction component 203 is positioned on the same horizontal plane with the uppermost end of the grinding piece.

It is added that the first prediction component 202 and the second prediction component 203 are on the same horizontal plane and pass over the limit of the turning roller 5021.

Further, the first prediction component 202 includes a first flexible guide 2021, and a forward wedge plate 2022 is slidably inserted into the first flexible guide 2021;

the second prediction component 203 comprises a second elastic guide rail 2031, and a balance bar 2032 is inserted in the second elastic guide rail 2031 in a sliding manner;

a reverse wedge-shaped plate 2033 is connected in the middle of the side part of the balance bar 2032;

the forward wedge plate 2022 is opposite to the reverse wedge plate 2033 in bevel angle direction.

Further, a lifting mechanism 204 is slidably connected inside the supporting member 201, the lifting mechanism 204 further includes a lifting rod 2041 connected to a side portion thereof, a guide groove 20411 is arranged inside the lifting rod 2041, and an adjusting rod 2043 is slidably connected inside the guide groove 20411;

a sleeve block 2042 for adjusting the position of the lifting mechanism 204 is connected to the upper and lower parts of the adjusting rod 2043 and located on the lifting rod 2041;

an air cylinder 205 is arranged inside the supporting part 201 and on the side of the adjusting rod 2043, and a telescopic block 2051 for controlling the position of the adjusting rod 2043 is slidably connected inside the air cylinder 205;

the lower part of the adjusting rod 2043 is connected with a rack 2044;

a limiting mechanism is arranged on the outer side of the adjusting rod 2043, and a resetting mechanism 2045 is sleeved on the lower portion of the limiting mechanism on the outer side of the adjusting rod 2043 and the upper portion of the telescopic rod 2051.

It is to be supplemented that a transmission unit 3 is arranged at the lower part of the detection unit 2, the transmission unit 3 comprises a driving assembly 301, the driving assembly 301 comprises a driving motor 3011 and a rotating roller 3012 rotationally connected with the driving motor 3011, a sprocket assembly 3013 for driving two rows of turning rollers 5021 arranged inside the supporting block 502 to rotate is rotationally connected to the outside of the rotating roller 3012, and a bevel gear 3014 in meshing transmission with the rack 2044 is arranged at the outer side of the rotating roller 3012 and at the right side of the sprocket assembly 3013;

the turning rollers 5021 are divided into four groups, and one end of the displacement detection unit 2 is in a step shape.

As a modification, as shown in fig. 6, fig. 10 to 12, the fixing unit 4 includes:

an inflation conduit 402;

a first control valve 403, through which the inflation tube 402 passes, for controlling the gas motion state of the inflation tube 402;

an air outlet 407, wherein the air outlet 407 for discharging the air inside the fixing unit 4 is connected to the side of the air charging duct 402;

a second control valve 404, wherein the second control valve 404 for controlling an air outlet 407 penetrates the air outlet 407;

an expansion mechanism 406, one end of the expansion mechanism 406 is connected with the side part of the detection unit 2.

It should be added that, as shown in fig. 12, the first control valve 403 includes:

a limiting mechanism is arranged between the lower end of the first baffle 4031 and the support component 201;

a first air hole 40311 penetrates through the first baffle 4031;

a first return spring 4042 for controlling the return of the first baffle 4031 is movably sleeved on the outer side of the first baffle 4031;

the second control valve 403 includes: a second air hole 4043 matched with the diameter of the air outlet 407 penetrates through the second baffle 4041, and a second return spring 4042 is movably sleeved on the outer side of the second baffle 4041;

the top of the second control valve 404 is higher than the height of the first control valve 403.

Further, the expanding mechanism 406 includes:

a gas storage tank 4061;

the guide sleeves 4062, the guide sleeves 4062 are provided with three groups, and the three groups are all annularly arranged outside the gas storage tank 4061;

the top block 405 is inserted into the guide sleeve 4062 in a sliding manner.

Further, as shown in fig. 6 to 7 and 11, the fixing unit 4 is provided at a lower end thereof with an adjusting unit 5, and the adjusting unit 5 includes:

a limiting component 501;

four groups of supporting blocks 502 are arranged on the supporting blocks 502 and distributed on two sides of the limiting component 501;

an opening at the upper end of the gas distribution pipe 503 is communicated with the inflation pipeline 402, and the lower end of the gas distribution pipe 503 is communicated with the limiting component 501;

the limiting assembly 501 comprises: the disc 5011 is provided with a limiting block 5012 in an inner movable insertion mode, and a supporting spring 5013 is arranged at the lower end of the limiting block 5012;

the upper end of the limiting block 5012 is in an inclined convex shape.

It should be noted that, initially, the fixing unit 4 is in a contracted state, the first polishing roller 101 and the second polishing roller 102 are in a separated state, the polishing member is sleeved outside the expanding mechanism 406, so that when the polishing member is located at a position where one end of the detecting unit 2 abuts against a limit position of the turning roller 5021, at this time, the first predicting component 201 and the second predicting component 203 are in a compressed state, the driving motor 3011 is started, the driving motor 3011 drives the turning roller 5021 to rotate through the rotating roller 3012, so that the turning roller 5021 drives the polishing member to rotate, when the weld seam of the polishing member rotates to the forward wedge-shaped plate 2022, the forward wedge-shaped plate 2022 abuts against the weld seam under the thrust of the internal elastic mechanism and records the position of the weld seam, at this time, the forward wedge-shaped plate 2022 is controlled by an internal electric signal, so that the air cylinder 205 drives the adjusting rod 2043 to move to engage with the helical gear 3014 through the telescopic block 2051, at this time, the helical gear 3014 drives the rack 2044 to move downward under the rotating action of the rotating roller 3012, the rack 2044 drives the lifting rod 2041 to move downwards through the sleeve block 2042, the lifting rod 2041 drives the first polishing roller 101 to move downwards through the lifting mechanism 204, so that the first polishing roller 101 and the second polishing roller 102 clamp a polishing part, at the moment, the reverse wedge-shaped plate 2033 is inserted into a welding seam under the action of elastic force, the polishing part is prevented from continuously rotating through reverse helical teeth, and the driving motor 3011 is turned off.

As shown in fig. 10-12, the first baffle 4031 is driven to compress the first return spring 4032 to move downward during the process that the lifting rod 2041 drives the lifting mechanism 204 to move downward, when the first grinding roller 101 and the second grinding roller 102 are contacted with the grinding member, the first air hole 40311 is communicated with the air charging pipe 402, and the second air hole 4043 is staggered with the air outlet hole 407, the air pump 401 fills the air into the air storage tank 4061 through the air filling pipe 402, the air pushes the top block 405 inside the air storage tank 4061 to compress the third return spring 4051 to expand outwards to position the polishing member, meanwhile, the gas inside the inflation tube 402 enters the limiting component 501 through the gas distribution tube 503, and pushes the limit block 5012 to compress the support spring 5013 to move upwards, so that the fixed polishing piece is limited left and right, therefore, the polishing piece is positioned in an omnibearing positioning mode, and the polishing precision is prevented from being low due to the fact that the polishing piece deviates in the polishing process;

as shown in fig. 1 to 5, when a polishing member is fixed and the inner and outer welding seams are abutted by the first polishing roller 101 and the second polishing roller 102, the first driving roller 1012 and the second driving roller 1022 respectively drive the outer polishing belt 1013 and the inner polishing belt 1023 to rotate, so that a linear polishing track is formed at a position where the polishing member contacts with the polishing belt, and then, a driving motor inside the main fine adjustment tooth 1015 is started, so that the main fine adjustment wheel 1015 drives the slave micro-gear 1024 engaged therewith to rotate, at this time, the first swinging disc 1011 and the second swinging disc 1021 rotate synchronously, so that the polishing tracks of the polishing member by the outer polishing belt 1013 and the inner polishing belt 1023 are changed from the linear polishing track to a surface polishing track, the polishing range is wide, and positioning deviation caused by repeatedly switching the positioned polishing member is avoided.

Example two

Referring to fig. 8, fig. 11 to 12, wherein the same or corresponding components as in the first embodiment are designated by the same reference numerals as in the first embodiment, only the differences from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that:

through set up venthole 407 at gas-filled duct 402 lateral part, after polishing, driving motor 3011 drives rack 2044 rebound through rotor 3012, rack 2044 drives set 2042 through adjusting pole 2043 and drives lifter 2041 rebound, at this moment, first control valve 403 closes gas-filled duct 402, second control valve 404 opens venthole 407 simultaneously, make the inside gas reflux of gas storage tank 4061 and spacing subassembly 501 and spout in venthole 407 department, will leave over the piece of polishing in subassembly 1 department of polishing and blow off, avoid the piece to bring the influence for subsequent polishing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a pipe fitting welding seam equipment of polishing which characterized in that includes:

the polishing components (1) are distributed at the inner end and the outer end of the polishing piece;

the detection unit (2) is arranged at the fixed end of the polishing assembly (1);

the fixing unit (4), the said fixing unit (4) locates the side of the said detecting element (2);

after the grinding piece finds the position of the welding line by using the detection unit (2) in the rotating process, the grinding piece is locked in position by the fixing unit (4), and an inner and outer smooth grinding surface is formed in the grinding mode of the grinding assembly (1) in a swinging and grinding mode.

2. A pipe fitting weld grinding apparatus according to claim 1, wherein the grinding assembly (1) comprises:

a first sanding roller (101);

and the second grinding roller (102), wherein the second grinding roller (102) is arranged at the lower part of the first grinding roller (101).

3. A pipe weld grinding apparatus according to claim 2, wherein the first grinding roller (101) comprises:

a first wobble plate (1011);

the first driving roller (1012), the said first driving roller (1012) is connected to the inside of the first wobble plate (1011) rotatably;

the two groups of support plates (1014) are rotatably connected to the side part of the first swinging plate (1011) in the same horizontal plane;

a main fine-tuning tooth (1015), wherein the main fine-tuning tooth (1015) is connected to the side part of the first swinging plate (1011);

and the outer polishing belt (1013) is formed into a regular triangle shape under the action of the support plate (1014) and the first driving roller (1012).

4. A pipe weld grinding apparatus according to claim 3, wherein the second grinding roller (102) comprises:

a second wobble plate (1021);

a second driving roller (1022), wherein the second driving roller (1022) is rotatably connected to the side part of the second swinging disk;

the inner polishing belt (1023) is sleeved on the second driving roller (1022) to form an inverted triangle;

a slave fine-tuning tooth (1024) connected to a side of the second wobble plate (1021) opposite the second drive roller (1022);

the first drive roller (1012) is in the same vertical line as the second drive roller (1022);

the master fine tuning teeth (1015) mesh with slave fine tuning teeth (1024).

5. Pipe weld grinding apparatus according to claim 1, characterized in that the detection unit (2) comprises:

a support member (201);

a first prediction component (202), wherein the first prediction component (202) is arranged on the side of the support component (201);

and the second prediction component (203), the second prediction component (203) is arranged at the side part of the supporting component (201) and is positioned at the same horizontal plane with the uppermost end of the grinding piece.

6. The pipe fitting weld grinding apparatus according to claim 5, wherein the first prediction assembly (202) comprises a first elastic guide rail (2021), and a forward wedge plate (2022) is slidably inserted in the first elastic guide rail (2021);

the second prediction component (203) comprises a second elastic guide rail (2031), and a balance rod (2032) is inserted in the second elastic guide rail (2031) in a sliding way;

the middle of the side part of the balance rod (2032) is connected with a reverse wedge-shaped plate (2033);

the oblique angle directions of the forward wedge-shaped plate (2022) and the reverse wedge-shaped plate (2033) are opposite.

7. The pipe welding seam grinding device according to claim 5, characterized in that a lifting mechanism (204) is slidably connected inside the supporting component (201), the lifting mechanism (204) further comprises a lifting rod (2041) connected to the side portion of the lifting mechanism, a guide groove (20411) is formed inside the lifting rod (2041), and an adjusting rod (2043) is slidably connected inside the guide groove (20411);

an air cylinder (205) is arranged inside the supporting part (201) and on the side of the adjusting rod (2043), and a telescopic block (2051) for controlling the position of the adjusting rod (2043) is connected inside the air cylinder (205) in a sliding manner;

the lower part of the adjusting rod (2043) is connected with a rack (2044).

8. A pipe fitting weld grinding apparatus according to claim 1, wherein the fixing unit (4) comprises:

an inflation conduit (402);

a first control valve (403), wherein the first control valve (403) for controlling the gas motion state of the inflation pipeline (402) penetrates through the inflation pipeline (402);

an air outlet hole (407), wherein the air outlet hole (407) is used for discharging air in the fixing unit (4) and is connected with the side part of the inflation pipeline (402);

the second control valve (404) is used for controlling the second control valve (404) of the air outlet hole (407) to penetrate through the air outlet hole (407);

an expansion mechanism (406), one end of the expansion mechanism (406) and the side of the detection unit (2).

9. A pipe fitting weld grinding apparatus as claimed in claim 8, wherein the expansion mechanism (406) comprises:

a gas storage tank (4061);

the guide sleeves (4062), the guide sleeves (4062) are provided with three groups, and the three groups are annularly arranged on the outer side of the gas storage tank (4061);

the top block (405) is inserted in the guide sleeve (4062) in a sliding mode.

10. Pipe welding grinding device according to claim 8, characterized in that the lower end of the fixing unit (4) is provided with an adjusting unit (5), the adjusting unit (5) comprising:

a spacing assembly (501);

the four groups of supporting blocks (502) are arranged on the supporting blocks (502) and are distributed on two sides of the limiting component (501);

the opening at the upper end of the gas distribution pipe (503) is communicated with the inflation pipeline (402), and the lower end of the gas distribution pipe (503) is communicated with the limiting component (501).