Auxiliary grinding device for nondestructive testing of pressure-bearing pipeline

Abstract

The utility model relates to the technical field of pipeline detection, and discloses an auxiliary polishing device for nondestructive testing of a pressure-bearing pipeline, which comprises a shell, a rotating wheel assembly, an auxiliary wheel assembly and a polishing mechanism, a containing cavity is formed in the shell, and a rotating wheel groove is arranged on the shell. The shell is cylindrical and comprises a cylindrical hollow shell cabin and two end covers, and the two end covers are fixed to the two ends of the hollow shell cabin respectively. Three rotating wheel assemblies are arranged in the shell, driving structures of the rotating wheel assemblies are located in the containing cavity of the shell, and rotating wheels in the rotating wheel assemblies extend to the outer side of the shell from rotating wheel grooves to be used for walking. The driving structure of the rotating wheel assembly is arranged in the containing cavity, so that too fast pollution and damage to the driving structure of the rotating wheel assembly caused by the fact that attachments such as scale cleaned and polished by the polishing mechanism enter the shell can be reduced. The pipeline polishing device can continuously polish and clean attachments on the inner wall of a pipeline for a long distance, is suitable for pipelines in a certain size range, and improves the polishing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to an auxiliary grinding device for nondestructive detection of pressure pipelines. Background Art

[0002] Pipelines can be divided into pressure-bearing pipelines and non-pressure-bearing pipelines based on the pressure they bear. The fluid in the former has a certain pressure and can flow to the corresponding parts without a certain slope, such as boiler steam pipelines and oil pipelines. Due to their more severe working conditions, they have higher maintenance requirements and need to be inspected regularly. Inspection of pressure-bearing pipelines can prevent sudden leaks, discover risk points in advance, and reduce losses.

[0003] The non-destructive testing of pressure pipes not only needs to be targeted at the outside of the pipes, but also whether the inside is intact is equally important. Due to long-term use, the inside of the pipes contains a lot of scale, attachments, etc., so they need to be removed before non-destructive testing to improve the accuracy of non-destructive testing.

[0004] There are also some inner wall grinding or cleaning devices for non-destructive testing of pipelines in the prior art, such as the Chinese utility model patent with application number CN202120855348.4, entitled A grinding device for non-destructive testing of power station boiler pipelines. It relies on the third electric telescopic rod to drive the mounting plate and the grinding block to move, so that the screw drives the sliding sleeve to rotate, and can achieve back and forth grinding of the inner wall of the pipeline to remove scale. However, due to the obstruction of the screw, it can only grind and clean short-length pipelines, and cannot work on continuous long pipelines.

[0005] Another example is the Chinese invention patent with application number CN201310468609.7, entitled "An automatic grinding device and method for oxide scale of pipelines specially used for non-destructive testing". The device can automatically grind the pipeline and ensure the grinding quality, but it can only grind the outer wall of the pipeline and cannot grind the inner wall. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide an auxiliary grinding device for non-destructive testing of pressure pipes that is different from the existing structure, which can continuously grind and clean attachments on the inner wall of the pipe for a long distance, and is suitable for pipes within a certain size range to improve the grinding efficiency.

[0007] The utility model is implemented by the following technical scheme: an auxiliary grinding device for non-destructive testing of pressure pipes, comprising a shell, a housing cavity is formed inside the shell, and a plurality of runner grooves are arranged on the shell; a runner assembly, a plurality of runner assemblies are arranged inside the shell, a driving structure of the runner assembly is located inside the housing cavity of the shell, and a runner in the runner assembly extends from the runner groove to the outside of the shell for walking; an auxiliary wheel assembly, a plurality of auxiliary wheel assemblies are also arranged inside the shell, and the auxiliary wheels in each auxiliary wheel assembly extend from a corresponding runner groove to the outside of the shell for auxiliary walking; and a grinding mechanism, the grinding mechanism is installed in front of the shell and is used for grinding the inner wall of the pressure pipe; the auxiliary grinding device for non-destructive testing of pressure pipes uses the runner assembly and the auxiliary wheel assembly to walk on the inner wall of the pipe, and uses the grinding mechanism to grind the inner wall of the pressure pipe during the walking process.

[0008] Furthermore, the polishing mechanism includes a mounting plate; a telescopic outer rod, a plurality of the telescopic outer rods are symmetrically fixed on the outside of the mounting plate at equal angles, and a circular through hole is provided in the center of each telescopic outer rod; a telescopic inner rod, the telescopic inner rod is arranged in the telescopic outer rod through a clearance fit; a telescopic rod knob, the telescopic rod knob is installed on the outer end of the telescopic outer rod through a threaded fit, and is used to adjust and fix the position of the telescopic inner rod in the telescopic outer rod; a brush body, the brush body is fixed on the outer end of the telescopic inner rod; brush filaments, the brush filaments are arranged on the outside of the brush body; and a telescopic rod connecting ring, the telescopic outer rods are connected and fixed by the telescopic rod connecting ring, and are used to improve the strength of the telescopic rod.

[0009] Furthermore, the driving structure of the rotating wheel assembly includes a connecting column; a rear support seat, the rear end of the connecting column is fixed to the rear end of the shell through the rear support seat; a rotating shaft, the rotating shaft is installed at the front end of the connecting column; a second bevel gear, the second bevel gear is sleeved and fixed on the rotating shaft; a motor, the motor is fixed on the outside of the connecting column; a motor driving gear, the motor driving gear is fixed to the driving end of the motor, the motor driving gear is meshed with the rear teeth of the second bevel gear for transmission; and a front support seat, the front part of the rotating shaft is rotatably installed on the front end of the shell through the front support seat, and the front end of the rotating shaft extends to the front of the shell.

[0010] Furthermore, the wheel assembly also includes a wheel frame; a driven sprocket, which is rotatably mounted on one end of the wheel frame; a conical sprocket, which is rotatably mounted on the other end of the wheel frame; a transmission belt, which is sleeved on the driven sprocket and the conical sprocket for transmission; a bevel gear shaft seat, which is fixed on the front support seat; a first bevel gear, which has two first bevel gears rotatably mounted on both ends of the bevel gear shaft seat, and the first bevel gear and the conical sprocket are transmitted through meshing; a front support sleeve, which is sleeved on the outer side of the connecting column; and a wheel frame connecting rod, one end of which is hinged to the outer side of the front support sleeve, and the other end of the wheel frame connecting rod is connected to the wheel frame.

[0011] Furthermore, the auxiliary wheel assembly includes a rear support sleeve, which is arranged on the outer side of the rear part of the connecting column; an auxiliary wheel frame, which has a plurality of auxiliary wheel frames symmetrically arranged on the outer side of the rear support sleeve; an auxiliary wheel, each auxiliary wheel frame having an auxiliary wheel installed therein; and a second spring, which is arranged between the rear support sleeve and the auxiliary wheel frame.

[0012] Furthermore, a first spring is sleeved on the connecting column, and the first spring is located between the rear support sleeve and the front support sleeve.

[0013] Furthermore, the shell is cylindrical, and comprises a cylindrical hollow shell compartment and two end covers, and the two end covers are respectively fixed at two ends of the hollow shell compartment.

[0014] Furthermore, a limit spring is arranged in the central through hole of each telescopic outer rod, and two ends of the limit spring are respectively connected to the bottom end of the telescopic inner rod and the bottom end of the central through hole of the telescopic outer rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model is an auxiliary grinding device for non-destructive testing of pressure pipes. The driving structure of the rotary wheel assembly provides power to move on the inner wall of the pipe. During the movement, the second bevel gear drives the rotating shaft to rotate, and the grinding mechanism is used to grind the inner wall of the pressure pipe, and the scale and other attachments on the inner wall of the pipe are polished and cleaned, which improves efficiency. The device uses a motor to achieve walking and rotating grinding at the same time, which simplifies the structure of the device and improves reliability.

[0017] 2. The utility model is an auxiliary grinding device for non-destructive testing of pressure pipes, in which the main parts of the rotary wheel assembly and the auxiliary wheel assembly are arranged inside the accommodating cavity of the shell, which can reduce the scale and other attachments cleaned and polished off by the grinding mechanism from entering the shell, causing the driving structure of the rotary wheel assembly to be contaminated and damaged too quickly, thereby protecting the structure inside the shell and allowing the equipment to work continuously and stably for a longer time.

[0018] 3. The utility model provides an auxiliary grinding device for non-destructive testing of pressure pipes, wherein the connecting rod of the rotary wheel frame can adjust the opening and closing angle following the forward and backward movement of the front support sleeve, so that the height of the rotary wheel assembly can be adjusted within a certain range. At the same time, the height of the grinding mechanism and the auxiliary wheel assembly can be automatically adjusted, so that it can be suitable for pipes within a certain size range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the auxiliary grinding device for nondestructive testing of pressure pipes of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model after the grinding mechanism is removed;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model after removing the grinding mechanism and the shell Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the structure of the utility model after removing the grinding mechanism and the shell Figure 2 ;

[0023] Figure 5 It is a partial structural schematic diagram of the driving structure of the rotating wheel assembly in the utility model;

[0024] Figure 6 It is a sectional view of the connection between the telescopic outer rod and the telescopic inner rod in the utility model.

[0025] In the figure: housing 2; wheel assembly 3; auxiliary wheel assembly 5; telescopic outer rod 11; telescopic inner rod 12; telescopic rod knob 13; brush body 14; brush filament 15; telescopic rod connecting ring 16; mounting plate 17; limit spring 18; shell compartment 21; end cover 22; wheel groove 23; shaft 24; wheel 31; driven sprocket 32; wheel frame 33; transmission belt 34; wheel frame connecting rod 35; conical sprocket 36; front support sleeve 37; first conical gear 38; second conical gear 39; motor 310; motor driving gear 311; conical gear shaft seat 312; front support seat 41; rear support seat 42; connecting column 43; first spring 44; rear support sleeve 51; auxiliary wheel frame 52; auxiliary wheel 53; second spring 54. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] The utility model aims to provide an auxiliary grinding device for nondestructive testing of pressure pipes in view of the defects of the prior art.

[0028] Embodiment 1

[0029] This embodiment provides an auxiliary grinding device for nondestructive testing of pressure pipes. Figure 1-Figure 3 As shown, it includes a shell 2, a wheel assembly 3, an auxiliary wheel assembly 5 and a grinding mechanism, wherein a receiving chamber is formed inside the shell 2, and six wheel grooves 23 are arranged on the shell 2. Specifically, the shell 2 in this embodiment is cylindrical, and includes a cylindrical hollow shell compartment 21 and two end covers 22, and the two end covers 22 are respectively fixed at both ends of the hollow shell compartment 21. Three wheel assemblies 3 are arranged in the shell 2, and the driving structure of the wheel assembly 3 is located inside the receiving chamber of the shell 2. The wheel 31 in the wheel assembly 3 extends from the wheel groove 23 to the outside of the shell 2 for walking; by arranging the driving structure of the wheel assembly 3 inside the receiving chamber, it is possible to reduce the scale and other attachments cleaned and polished by the grinding mechanism from entering the shell 2, which causes the driving structure of the wheel assembly 3 to be polluted and damaged too quickly, thereby protecting the structure inside the shell 2. Three auxiliary wheel assemblies 5 are also arranged in the shell 2. The auxiliary wheel 53 in each auxiliary wheel assembly 5 extends from a corresponding wheel groove 23 to the outside of the shell 2 for assisting walking. The grinding mechanism is installed in front of the shell 2 for grinding the inner wall of the pressure pipe.

[0030] The auxiliary grinding device for non-destructive testing of pressure pipes of the utility model utilizes a rotating wheel assembly 3 and an auxiliary wheel assembly 5 to move on the inner wall of the pipe. During the moving process, the inner wall of the pressure pipe is grinded by the grinding mechanism to grind away attachments such as scale on the inner wall of the pipe. By arranging the main parts of the rotating wheel assembly 3 and the auxiliary wheel assembly 5 inside the accommodating cavity of the shell 2, it is possible to reduce the attachments such as scale cleaned and grinded away by the grinding mechanism from entering the shell 2, which would cause the driving structure of the rotating wheel assembly 3 to be contaminated and damaged too quickly, thereby protecting the structure inside the shell 2 and allowing the equipment to work continuously and stably for a longer period of time.

[0031] Reference Figure 1As shown, the grinding mechanism includes a telescopic outer rod 11, a telescopic inner rod 12, a telescopic rod knob 13, a brush body 14, a brush filament 15, a telescopic rod connecting ring 16 and a mounting plate 17. Six telescopic outer rods 11 are symmetrically fixed on the outside of the mounting plate 17 at equal angles. A circular through hole is provided in the center of each telescopic outer rod 11. The telescopic inner rod 12 is provided in the telescopic outer rod 11 through clearance fit. The telescopic rod knob 13 is installed at the outer end of the telescopic outer rod 11 through thread fit, which is used to adjust and fix the position of the telescopic inner rod 12 in the telescopic outer rod 11. The brush body 14 is fixed to the outer end of the telescopic inner rod 12. The outer part of the brush body 14 is arc-shaped, which can better fit the inner wall of the pipeline, and polish and clean the attachments on the inner wall of the pipeline to improve the grinding effect. The brush filament 15 is provided on the outer side of the brush body 14. The brush filament 15 can use industrial wear-resistant metal brush filaments or plastic brush filaments in the prior art. The telescopic outer rods 11 are connected and fixed by the telescopic rod connecting ring 16 to improve the strength of the telescopic rod.

[0032] Reference Figure 6 As shown, a limit spring 18 is disposed in the central through hole of each telescopic outer rod 11, and the two ends of the limit spring 18 are respectively connected to the bottom end of the telescopic inner rod 12 and the bottom end of the central through hole of the telescopic outer rod 11. The matching length of the telescopic inner rod 12 and the telescopic outer rod 11 can be fixed by the telescopic rod knob 13, or can be adjusted elastically, that is, not fixed by the telescopic rod knob 13, so that the matching length of the telescopic inner rod 12 and the telescopic outer rod 11 is automatically adjusted according to the distance from the inner wall of the pipe under the action of the limit spring 18.

[0033] Embodiment 2

[0034] This embodiment provides an auxiliary grinding device for nondestructive testing of pressure pipes. Based on the structure of the first embodiment, Figure 2-Figure 5As shown, the driving structure of the rotating wheel assembly 3 includes a rotating shaft 24, a second bevel gear 39, a motor 310, a motor driving gear 311, a front support seat 41, a rear support seat 42 and a connecting column 43. The rear end of the connecting column 43 is fixed to the rear end of the housing 2 through the rear support seat 42, the rotating shaft 24 is installed at the front end of the connecting column 43, the second bevel gear 39 is sleeved and fixed on the rotating shaft 24, the motor 310 is fixed to the outside of the connecting column 43, the motor driving gear 311 is fixed to the driving end of the motor 310, the motor driving gear 311 is meshed with the rear teeth of the second bevel gear 39 for transmission, the front part of the rotating shaft 24 is rotatably installed at the front end of the housing 2 through the front support seat 41, and the front end of the rotating shaft 24 extends to the front of the housing 2. The wheel assembly 3 also includes a driven sprocket 32, a wheel frame 33, a transmission belt 34, a wheel frame connecting rod 35, a conical sprocket 36, a front support sleeve 37, a first conical gear 38 and a conical gear shaft seat 312. The driven sprocket 32 ​​is rotatably mounted on one end of the wheel frame 33, the conical sprocket 36 is rotatably mounted on the other end of the wheel frame 33, and the wheel 31 is coaxially connected to the driven sprocket 32. The transmission belt 34 is sleeved on the driven sprocket 32 ​​and the conical sprocket 36 for transmission. The conical gear shaft seat 312 is fixed on the front support seat 41. Two first conical gears 38 are rotatably installed at both ends of the conical gear shaft seat 312. The first conical gears 38 and the conical sprocket 36 are transmitted through meshing. The front support sleeve 37 is sleeved on the outer side of the connecting column 43. One end of the wheel frame connecting rod 35 is hinged to the outer side of the front support sleeve 37, and the other end of the wheel frame connecting rod 35 is connected to the wheel frame 33. One or two wheel frame connecting rods 35 can be set, and the two wheel frame connecting rods 35 are symmetrically fixed on both sides of the wheel frame 33. When the motor 310 is working, it drives the motor driving gear 311 to rotate, and the meshing transmission of the motor driving gear 311, the second bevel gear 39, and the first bevel gear 38 drives the conical sprocket 36 to rotate. The conical sprocket 36 and the driven sprocket 32 ​​are transmitted through the transmission belt 34, driving the rotating wheel 31 to rotate and walk on the inner wall of the pipeline. The rotating wheel frame connecting rod 35 can follow the front support sleeve 37 to adjust the opening and closing angle, so that the inclination angle of the rotating wheel frame 33 can be adjusted, and then the distance between the rotating wheel 31 and the central axis of the connecting column 43 can be adjusted, so that the height of the rotating wheel assembly 3 can be adjusted within a certain range, which is suitable for pipelines of a certain size range. At the same time, the second bevel gear 39 drives the rotating shaft 24 to rotate, driving the grinding mechanism to rotate. The device uses one motor to achieve walking and rotating grinding at the same time, which simplifies the structure of the device and improves reliability.

[0035] Reference Figure 3As shown, the auxiliary wheel assembly 5 includes a rear support sleeve 51, an auxiliary wheel frame 52, an auxiliary wheel 53 and a second spring 54. The rear support sleeve 51 is sleeved and fixed on the rear outer side of the connecting column 43. A plurality of auxiliary wheel frames 52 are symmetrically arranged on the outer side of the rear support sleeve 51. An auxiliary wheel 53 is installed in each auxiliary wheel frame 52. A second spring 54 is arranged between the rear support sleeve 51 and the auxiliary wheel frame 52, so that the matching length between the rear support sleeve 51 and the auxiliary wheel frame 52 can be automatically adjusted within a certain range. Figure 5 As shown, a first spring 44 is sleeved on the connecting column 43 . The first spring 44 is located between the rear support sleeve 51 and the front support sleeve 37 and is used to adjust the distance between the rear support sleeve 51 and the front support sleeve 37 .

[0036] The utility model is an auxiliary grinding device for non-destructive testing of pressure pipes. When working, the driving structure of the wheel assembly 3 is used to provide power, and the motor 310 drives the motor driving gear 311 to rotate, and the meshing transmission of the motor driving gear 311, the second bevel gear 39, and the first bevel gear 38 drives the conical sprocket 36 to rotate, and then drives the wheel 31 to rotate through the transmission belt 34, and walks on the inner wall of the pipe. During the walking process, the second bevel gear 39 drives the rotating shaft 24 to rotate, and the grinding mechanism is used to grind the inner wall of the pressure pipe, and the scale and other attachments on the inner wall of the pipe are polished and cleaned, thereby improving efficiency. By arranging the main parts of the wheel assembly 3 and the auxiliary wheel assembly 5 inside the accommodating cavity of the shell 2, it can reduce the scale and other attachments cleaned by the grinding mechanism from entering the shell 2, causing the driving structure of the wheel assembly 3 to be polluted and damaged too quickly, thereby protecting the structure inside the shell 2, so that the equipment can work continuously and stably for a longer time.

[0037] The utility model is an auxiliary grinding device for nondestructive testing of pressure pipes, wherein the wheel frame connecting rod 35 can follow the front and rear movement of the front support sleeve 37 to adjust the opening and closing angle, so that the inclination angle of the wheel frame 33 can be adjusted, and then the distance between the wheel 31 and the central axis of the connecting column 43 can be adjusted, so that the height of the wheel assembly 3 can be adjusted within a certain range, and is suitable for pipes of a certain size range. At the same time, the height of the grinding mechanism and the auxiliary wheel assembly 5 can be automatically adjusted within a certain range according to the size of the pipe, so as to continuously grind and clean the attachments on the inner wall of the pipe for a long distance.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An auxiliary grinding device for nondestructive testing of pressure pipes, characterized in that: include A housing (2), wherein a receiving cavity is formed inside the housing (2), and a plurality of rotating wheel grooves (23) are provided on the housing (2); A rotating wheel assembly (3), wherein a plurality of rotating wheel assemblies (3) are arranged in the housing (2), a driving structure of the rotating wheel assembly (3) is located inside the accommodating cavity of the housing (2), and a rotating wheel (31) in the rotating wheel assembly (3) extends from the rotating wheel groove (23) to the outside of the housing (2) for movement; Auxiliary wheel assemblies (5), wherein a plurality of auxiliary wheel assemblies (5) are arranged in the housing (2), and an auxiliary wheel (53) in each auxiliary wheel assembly (5) extends from a corresponding rotating wheel groove (23) to the outside of the housing (2) for assisting walking; and A grinding mechanism, which is installed in front of the housing (2) and is used to grind the inner wall of the pressure pipe; The auxiliary grinding device for non-destructive testing of pressure pipes uses a rotating wheel assembly (3) and an auxiliary wheel assembly (5) to move on the inner wall of the pipe, and uses a grinding mechanism to grind the inner wall of the pressure pipe during the moving process.

2. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 1 is characterized in that: The grinding mechanism comprises Mounting plate (17); A telescopic outer rod (11), wherein a plurality of the telescopic outer rods (11) are symmetrically fixed at equal angles on the outside of the mounting plate (17), and a circular through hole is provided at the center of each telescopic outer rod (11); A telescopic inner rod (12), wherein the telescopic inner rod (12) is arranged in the telescopic outer rod (11) through clearance fit; A telescopic rod knob (13), wherein the telescopic rod knob (13) is installed on the outer end of the telescopic outer rod (11) through threaded engagement, and is used to adjust and fix the position of the telescopic inner rod (12) inside the telescopic outer rod (11); A brush body (14), wherein the brush body (14) is fixed to the outer end of the telescopic inner rod (12); Brush filaments (15), wherein the brush filaments (15) are arranged on the outside of the brush body (14); and The telescopic rod connecting ring (16) is used to connect and fix the telescopic outer rods (11) to improve the strength of the telescopic rod.

3. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 1 or 2, characterized in that: The driving structure of the rotating wheel assembly (3) comprises Connecting column (43); A rear support seat (42), wherein the rear end of the connecting column (43) is fixed to the rear end of the housing (2) through the rear support seat (42); A rotating shaft (24), wherein the rotating shaft (24) is installed at the front end of the connecting column (43); A second bevel gear (39), wherein the second bevel gear (39) is sleeved and fixed on the rotating shaft (24); A motor (310) fixed on the outside of the connecting column (43); A motor driving gear (311), wherein the motor driving gear (311) is fixed to the driving end of the motor (310), and the motor driving gear (311) is meshed with the rear teeth of the second bevel gear (39) for transmission; and A front support seat (41), wherein the front portion of the rotating shaft (24) is rotatably mounted on the front end of the housing (2) through the front support seat (41), and the front end of the rotating shaft (24) extends to the front of the housing (2).

4. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 3 is characterized in that: The rotating wheel assembly (3) also includes Rotating wheel frame (33); A driven sprocket (32), wherein the driven sprocket (32) is rotatably mounted on one end of a rotating wheel frame (33); A conical sprocket (36), wherein the conical sprocket (36) is rotatably mounted on the other end of the rotating wheel frame (33); A transmission belt (34), wherein the transmission belt (34) is sleeved on the driven sprocket (32) and the conical sprocket (36) for transmission; A bevel gear shaft seat (312), wherein the bevel gear shaft seat (312) is fixed on the front support seat (41); First bevel gears (38), two first bevel gears (38) are rotatably mounted on both ends of the bevel gear shaft seat (312), and the first bevel gears (38) are meshed with the conical sprocket (36) for transmission; A front support sleeve (37), wherein the front support sleeve (37) is sleeved on the outer side of the connecting column (43); and A rotating wheel frame connecting rod (35), one end of which is hinged to the outer side of the front support sleeve (37), and the other end of which is connected to the rotating wheel frame (33).

5. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 4 is characterized in that: The auxiliary wheel assembly (5) comprises A rear support sleeve (51), wherein the rear support sleeve (51) is sleeved on the rear outer side of the connecting column (43); Auxiliary wheel frames (52), wherein a plurality of auxiliary wheel frames (52) are symmetrically arranged on the outer side of the rear support sleeve (51); Auxiliary wheels (53), one auxiliary wheel (53) is installed in each auxiliary wheel frame (52); and A second spring (54) is provided between the rear support sleeve (51) and the auxiliary wheel frame (52).

6. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 5, characterized in that: The connecting column (43) is sleeved with a first spring (44), and the first spring (44) is located between the rear support sleeve (51) and the front support sleeve (37).

7. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 1, characterized in that: The shell (2) is cylindrical and comprises a cylindrical hollow shell compartment (21) and two end covers (22). The two end covers (22) are respectively fixed at two ends of the hollow shell compartment (21).

8. The auxiliary grinding device for nondestructive testing of pressure pipes according to claim 2, characterized in that: A limit spring (18) is arranged in the central through hole of each telescopic outer rod (11), and two ends of the limit spring (18) are respectively connected to the bottom end of the telescopic inner rod (12) and the bottom end of the central through hole of the telescopic outer rod (11).

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