A pipeline defect stress composite detection device and its detection control method

Abstract

The present invention relates to the technical field of pipeline stress detection, in particular to a pipeline defect stress composite detection device and its detection control method, which includes two arc-shaped seats. One end of the two arc-shaped seats is hinged to each other, and the other end of the two arc-shaped seats is detachably connected by a buckle. It further includes: a driving component installed on the inner arc surface of the arc-shaped seat to drive the arc-shaped seat to move along the pipeline; two cleaning brushes respectively fixed on one side edge of the two arc-shaped seats, and the two cleaning brushes form a complete ring after being combined; a cleaning liquid circulation component installed on the outer arc surface of the arc-shaped seat. Through the setting of the cleaning liquid circulation component, the cleaning brushes move with the arc-shaped seats to clean the surface of the steel pipe, and after the cleaning is completed, the cleaning liquid sprayed on the surface of the steel pipe is recycled through the cleaning liquid circulation component, so that the cleaning liquid is recycled.

Description

Technical Field

[0001] The present invention relates to the field of pipeline stress detection, and particularly to a pipeline defect stress composite detection device and its detection control method. Background Art

[0002] Pipeline defect stress composite detection refers to a detection method that comprehensively evaluates the structural defects and stress states of pipelines simultaneously. This method combines multiple detection techniques and aims to comprehensively understand the safety status of pipelines, including but not limited to defects such as corrosion, cracks, deformations, and dents, as well as stress distributions caused by factors such as internal pressure, external loads, and temperature changes.

[0003] When detecting the stress of a pipeline by ultrasonic waves, it is usually necessary to use a suitable coupling agent, such as water or oil-based gel, on the surface of the pipeline to ensure the effective transmission of ultrasonic waves into the material. When using a coupling agent on the pipeline surface, it is necessary to ensure that the detection surface is clean, flat, and grease-free to reduce interference with pipeline detection. Therefore, it is necessary to clean the pipeline surface before detection. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and to propose a pipeline defect stress composite detection device and its detection control method.

[0005] In a first aspect, the present invention provides a pipeline defect stress composite detection device, including two arc-shaped seats, one end of the two arc-shaped seats is hinged to each other, and the other end of the two arc-shaped seats is detachably connected by a buckle. The device further includes:

[0006] A driving component, installed on the inner arc surface of the arc-shaped seat to drive the arc-shaped seat to move along the pipeline;

[0007] Two cleaning brushes, respectively fixed on one side edge of the two arc-shaped seats, and the two cleaning brushes form a complete ring after being combined;

[0008] A cleaning liquid circulation component, installed on the outer arc surface of the arc-shaped seat to drive the cleaning liquid to circulate and be recycled after cleaning through the cleaning brush;

[0009] An ultrasonic detection component, installed on the other side of the arc-shaped seat to detect the pipeline after cleaning;

[0010] The operation clamps two arc-shaped seats outside the steel pipe to be detected. Subsequently, the ends of the two arc-shaped seats are positioned through the buckle between the other ends of the two arc-shaped seats, so that the two arc-shaped seats are sleeved on the surface of the steel pipe. After the arc-shaped seats are sleeved, the driving components on the inner arc surfaces of the arc-shaped seats support the steel pipe. The driving components support the arc-shaped seats through rollers, and while supporting the arc-shaped seats, the driving rollers are rotated to drive the arc-shaped seats to move, so that while the arc-shaped seats are moving, the surface of the pipeline is cleaned and then a coupling agent is applied.

[0011] During the movement of the arc-shaped seats, the cleaning liquid circulation component transports the cleaning liquid to the cleaning brush, so that after the cleaning liquid is transported to the position of the cleaning brush, the cleaning brush moves along with the arc-shaped seats to clean the surface of the steel pipe. And after the cleaning is completed, the cleaning liquid sprayed on the surface of the steel pipe is recycled through the cleaning liquid circulation component, so that the cleaning liquid is recycled.

[0012] The ultrasonic detection component is used to apply a coupling agent to the surface of the steel pipe after cleaning and perform ultrasonic detection, which is beneficial to perform ultrasonic detection after cleaning the surface of the steel pipe. And along with the movement of the arc-shaped seats, it can drive the ultrasonic detection component to move synchronously, so that the ultrasonic detection component can perform ultrasonic detection on different positions of the surface of the steel pipe, which is beneficial to improving the accuracy of the stress detection of the steel pipe.

[0013] Preferably, the driving component includes:

[0014] A plurality of first relief grooves, which are divided into two groups arranged symmetrically, and are all arranged in a circumferential array on the inner arc surfaces of the two arc-shaped seats;

[0015] A plurality of straight rods, which are arranged in one-to-one correspondence with the first relief grooves, and are respectively slidably inserted into the corresponding first relief grooves. Universal wheels are fixed at the ends of all the straight rods. The universal wheels are divided into two columns corresponding to the first relief grooves, and first springs are fixed between the universal wheels and the inner wall of the corresponding first relief grooves;

[0016] A second relief groove is opened on the inner wall of one of the arc-shaped seats;

[0017] A bracket is slidably installed inside the second relief groove, and a second spring is jointly fixed between the bracket and the inner wall of the second relief groove;

[0018] A driving wheel is rotatably installed on the bracket;

[0019] A motor is fixed on the side of the bracket, and the motor drives the driving wheel to rotate through an output shaft;

[0020] The straight rod can limit the elastic movement trajectory of the universal wheel. When the arc seat is sleeved on the surface of the steel pipe, the universal wheel fits on the surface of the steel pipe. The surface of the steel pipe squeezes the universal wheel to retreat, causing the universal wheel to push the first spring to compress, so that the universal wheel maintains an extrusion contact on the outside of the steel pipe. The first relief groove can provide a relief space for the retreat of the universal wheel. Thus, through the circumferential array arrangement of multiple universal wheels, the arc seat is supported on the outside of the steel pipe by the universal wheels;

[0021] The second relief groove is used to provide a relief space for the driving wheel. When the driving wheel is squeezed on the surface of the steel pipe, the driving wheel is reversely squeezed by the steel pipe, thereby pushing the second spring to compress. So that the driving wheel squeezes the steel pipe under the action of the second spring. After the motor is started, the driving wheel is driven to rotate through the output shaft. After the driving wheel rotates, it rotates along the surface of the steel pipe due to the squeezing action with the surface of the steel pipe, thereby driving the arc seat to move on the surface of the steel pipe. The universal wheel simultaneously supports the movement of the arc seat by rolling, thereby realizing the driving effect on the arc seat.

[0022] Preferably, it further includes:

[0023] A plurality of pressure sensors, which are arranged corresponding to one group of the first relief grooves, and the pressure sensors are fixed on the side wall of the universal wheel inside the corresponding first relief groove;

[0024] A plurality of fourth springs, which are arranged in one-to-one correspondence with the pressure sensors and are fixed between the corresponding pressure sensors and the side of the first relief groove;

[0025] A plurality of groups of scraping rods, with two scraping rods in a group. The plurality of groups of scraping rods are arranged corresponding to a row of universal wheels close to the ultrasonic detection component, and the scraping rods in the same group are symmetrically fixed on both sides of the corresponding universal wheel;

[0026] When the universal wheel moves towards the inside of the first relief groove under the extrusion of the steel pipe surface, the universal wheel drives the pressure sensor to move synchronously, causing the fourth spring to be compressed during the movement of the pressure sensor. The compressed fourth spring generates an elastic force, and thus exerts a pressure on the pressure sensor through the elastic force of the fourth spring, enabling the pressure sensor to detect the applied pressure. By using different pressure sensors to detect the pressure on different universal wheels, when there is a protrusion on the surface of the steel pipe, the protrusion position pushes the universal wheel to move a greater distance towards the inside of the first relief groove, thereby causing the fourth spring to be compressed more, increasing the pressure on the pressure sensor. When there is a protrusion on the surface of the steel pipe, the pressure information value detected by the pressure sensor on the corresponding universal wheel changes, and vice versa, thus identifying the defective position on the surface of the steel pipe. This is beneficial for detecting the defective position on the surface of the steel pipe during the process of cleaning the steel pipe when the arc-shaped seat moves, and cleaning the surface of the steel pipe with a cleaning brush, which is beneficial for cleaning the protrusions at the stain positions, thus avoiding interference from the protrusions at the stain positions on the detection of the defective position on the surface of the steel pipe.

[0027] Preferably, the cleaning liquid circulation assembly includes:

[0028] Two cleaning liquid tanks, which are respectively fixed on the outer arc surfaces of the two arc-shaped seats;

[0029] Two filter and exhaust assemblies, which are respectively installed inside the two cleaning liquid tanks and are used to filter the recycled liquid entering the inside of the cleaning liquid tanks to separate impurities and discharge the gas mixed in the recycled cleaning liquid;

[0030] Two recovery grooves, which are respectively opened inside the two arc-shaped seats. A number of second round holes are arranged in an array on the inner walls of the two recovery grooves, and the second round holes communicate the recovery grooves with the inner arc surfaces of the arc-shaped seats;

[0031] Two negative pressure pumps, which are respectively fixed on the side walls of the two cleaning liquid tanks. The output ends of the negative pressure pumps are communicated with the filter and exhaust assemblies, and the input ends of the negative pressure pumps are communicated with the recovery grooves;

[0032] The interior of the cleaning liquid tank stores the cleaning liquid. The cleaning liquid reaches the position of the cleaning brush through the filter and exhaust assembly, so that the cleaning liquid flows to the surface of the steel pipe through the cleaning brush, and the surface of the steel pipe is scrubbed by the cleaning brush. After the cleaning liquid flows to the surface of the steel pipe, with the movement of the arc-shaped seat, the cleaning liquid reaches the middle position of the arc-shaped seat. Under the negative pressure of the negative pressure pump, a strong negative pressure is generated inside the recovery tank. Thus, under the action of the negative pressure, the cleaning liquid on the surface of the steel pipe is absorbed through the second round hole and reaches the inside of the recovery tank, and then reaches the inside of the filter and exhaust assembly through the negative pressure pump. The filter and exhaust assembly processes the recovered cleaning liquid, discharges the gas synchronously inhaled during the recovery process, and filters the cleaning liquid, so that the impurities mixed in during the cleaning of the steel pipe surface are filtered and recovered, and the filtered cleaning liquid re-enters the cleaning brush to clean the surface of the steel pipe, thereby avoiding the situation that the cleaning liquid during cleaning adheres to the surface of the steel pipe and drips, interfering with the detection of the steel pipe.

[0033] Preferably, the filter and exhaust assembly includes:

[0034] A partition plate, fixed inside the cleaning liquid tank. The partition plate divides the interior of the cleaning liquid tank into a liquid discharge chamber and an exhaust chamber. A plurality of first round holes are formed through the side of the liquid discharge chamber facing the cleaning brush, and the first round holes connect the cleaning brush and the liquid discharge chamber;

[0035] A screen, fixed inside the exhaust chamber. The screen divides the exhaust chamber into an impurity chamber and a filtering chamber;

[0036] A one-way valve, fixedly penetrated through the side of the partition plate. The one-way valve unidirectionally connects the filtering chamber and the liquid discharge chamber;

[0037] An electromagnetic valve, fixedly penetrated through the side of the cleaning liquid tank. The electromagnetic valve connects the impurity chamber and the outside;

[0038] Under the action of the negative pressure pump, the recovered cleaning liquid reaches the inside of the impurity chamber. The cleaning liquid flows from the inside of the impurity chamber to the inside of the filtering chamber. During the flowing process, it passes through the screen, so that the impurities in the cleaning liquid are filtered and separated and remain inside the impurity chamber, while the clean liquid passes through the screen and enters the inside of the filtering chamber. When the negative pressure pump transports the cleaning liquid into the impurity chamber, the solenoid valve is in the closed state. At this time, under the action of the negative pressure pump, the internal pressure of the impurity chamber continuously increases. Thus, under the action of the pressure, the cleaning liquid inside the filtering chamber continuously enters the inside of the liquid discharge chamber through the one-way valve. Subsequently, the cleaning liquid reaches the cleaning brush through the first round hole inside the liquid discharge chamber for cleaning. When the liquid volume inside the filtering chamber decreases, the solenoid valve is controlled to open, so that the gas entering the impurity chamber together with the cleaning liquid is discharged by the solenoid valve, thereby reducing the air pressure inside the impurity chamber. Thus, it is avoided that the air pressure inside the impurity chamber continuously increases, resulting in the liquid volume inside the filtering chamber decreasing and the gas entering the liquid discharge chamber through the one-way valve, thus causing the gas to enter the cleaning brush and affecting the cleaning of the steel pipe surface.

[0039] Preferably, the ultrasonic detection assembly includes:

[0040] Two arc-shaped fixing plates are symmetrically fixed on the side edges of the arc-shaped seat, and sponge brushes are fixed on the opposite sides of the two arc-shaped fixing plates;

[0041] Multiple ultrasonic detectors are fixedly arranged in a circumferential array on the side edge after the combination of the two arc-shaped fixing plates;

[0042] The arc-shaped fixing plate can install the sponge brush and the ultrasonic detector. The sponge brush can apply the coupling agent to the surface of the steel pipe. The coupling agent can be absorbed inside the sponge brush and can be supplemented through an external coupling agent storage box. The coupling agent is applied to the surface of the steel pipe after cleaning. The ultrasonic detector can detect the stress on the surface of the steel pipe. The ultrasonic detector can move along with the arc-shaped seat, which is beneficial to detecting different positions on the surface of the steel pipe, thereby improving the accuracy of stress detection on the surface of the steel pipe.

[0043] Preferably, it further includes:

[0044] Multiple sliding grooves are respectively opened on the side edges of the two arc-shaped seats, and a third spring is fixed between the inner wall of the sliding groove and the cleaning liquid tank;

[0045] A pushing plate is fixed on the side edge of the cleaning liquid tank;

[0046] An electric telescopic rod is fixed on the side edge of the arc-shaped seat, and the telescopic end of the electric telescopic rod pushes the pushing plate to move;

[0047] After the electric telescopic rod is started, it can push the push plate to move through the telescopic rod. After the push plate moves, it drives the cleaning liquid tank to move, thereby driving the cleaning brush to move, so that the cleaning brush rotates around the surface of the steel pipe. At the same time, the movement of the cleaning liquid tank pushes the third spring to compress. After the telescopic rod of the electric telescopic rod resets, under the elastic force of the third spring, it pushes the cleaning liquid tank to reset, thereby driving the cleaning liquid tank and the cleaning brush to rotate reciprocally on the surface of the steel pipe, which is beneficial to improving the cleaning effect on the surface of the steel pipe.

[0048] In a second aspect, a detection control method for a pipeline defect stress composite detection device is provided. A controller is fixed on the side of the arc-shaped seat. The control method includes the following steps:

[0049] The controller receives a plurality of pressure information detected and obtained by each of the pressure sensors;

[0050] The controller compares each of the pressure information. When it detects that any one of the pressure information values is different from the values of the other pressure information, the controller generates reciprocating drive control information, and the reciprocating drive information is used to control the drive assembly to start reciprocating drive;

[0051] The controller sends the reciprocating drive control information to the drive assembly to control the drive assembly to start reciprocating drive;

[0052] A plurality of pressure sensors detect the pressure being pressed and send the detected pressure information to the controller. After receiving the pressure information, the controller compares each pressure information. When it detects that any one of the pressure information is different from the other pressure air pressure information, the controller generates reciprocating drive control information and sends the reciprocating drive control information to the drive assembly to control the drive assembly to start driving the arc-shaped seat to move reciprocally, repeatedly detect the position where the detected pressure information value is different, and stop the reciprocating drive after reciprocatingly driving a specified number of times, control the drive assembly to resume the original drive path, and drive the arc-shaped seat to continue moving for the detection of the surface of the steel pipe;

[0053] On the one hand, by repeatedly detecting the detected defect position through reciprocating detection, the accuracy of the stress detection on the surface of the steel pipe is improved. On the other hand, through the reciprocating movement of the arc-shaped seat, the detected defect position of the cleaning brush is repeatedly cleaned, which is beneficial to avoiding the situation where the stains not completely cleaned in one cleaning interfere with the detection results, thereby being beneficial to improving the accuracy of the stress detection on the surface of the steel pipe.

[0054] Preferably, a liquid flow sensor is installed on the side wall of the screen, and further includes:

[0055] The controller receives the liquid flow information generated by the liquid flow sensor when detecting liquid flow;

[0056] The controller generates closing control information according to the liquid flow information, and the closing control information is used to control the solenoid valve to close;

[0057] The controller sends the closing control information to the solenoid valve to control the solenoid valve to close;

[0058] The liquid flow sensor detects the liquid at the position of the screen. After the cleaning liquid fills the inside of the filter chamber, the cleaning liquid overflows from the inside of the filter chamber to reach the position of the screen. After the liquid flow sensor detects the presence of liquid, it generates liquid flow information and sends the liquid flow information to the controller. After receiving the liquid flow information, the controller generates closing control information according to the liquid flow information and sends the closing control information to the solenoid valve to control the solenoid valve to close. After the solenoid valve closes, as the negative pressure pump continuously transports the recovered cleaning liquid to the inside of the impurity chamber, the pressure inside the impurity chamber increases. The increased pressure exerts pressure on the connected filter chamber, causing the filtered cleaning liquid inside the filter chamber to pass through the one-way valve under pressure and reach the inside of the drain chamber, thereby realizing the filtration of the cleaning liquid. When the liquid flow sensor detects that there is no liquid flow at the position of the screen, that is, no liquid flow information is generated anymore. At this time, the solenoid valve returns to the open state, and the gas inside the impurity chamber is discharged from the solenoid valve, restoring the pressure inside the impurity chamber.

[0059] Preferably, a pressure sensor is installed inside the impurity chamber, and further includes:

[0060] The controller receives the air pressure information P detected by the pressure sensor;

[0061] The controller brings the air pressure information P and the standard air pressure P0 input by the controller into the judgment formula P > P0. When the judgment result is in line, the controller generates opening control information according to the judgment result, and the opening control information is used to control the solenoid valve to open;

[0062] The controller sends the opening control information to the solenoid valve to control the solenoid valve to open;

[0063] The pressure sensor can detect the air pressure inside the impurity chamber and send the detected air pressure information P to the controller. The staff can manually input the standard air pressure P0 through the controller and bring it into the judgment formula P > P0. When the air pressure information P is greater than the standard air pressure P0, the air pressure inside the impurity chamber is too high. At this time, the controller generates opening control information and sends the opening control information to the solenoid valve to control the solenoid valve to open, thereby avoiding the situation that the air pressure inside the impurity chamber is too high and the pressure exerted on the cleaning liquid increases under the action of the too high air pressure, resulting in excessive discharge of the cleaning liquid to the cleaning brush.

[0064] Compared with the prior art, the present invention has the following beneficial effects:

[0065] 1. Through the setting of the cleaning liquid circulation component, the present invention enables the cleaning brush to move along with the arc-shaped seat to clean the surface of the steel pipe. After the cleaning is completed, the cleaning liquid sprayed on the surface of the steel pipe is recycled through the cleaning liquid circulation component, so that the cleaning liquid can be recycled. The provided ultrasonic detection component is used to apply the coupling agent and perform ultrasonic detection on the surface of the steel pipe after cleaning. Therefore, it is beneficial to perform ultrasonic detection after cleaning the surface of the steel pipe. Along with the movement of the arc-shaped seat, the ultrasonic detection component can be driven to move synchronously, enabling the ultrasonic detection component to perform ultrasonic detection on different positions of the surface of the steel pipe, thus facilitating the improvement of the accuracy of stress detection of the steel pipe.

[0066] 2. Through the setting of the driving component, while supporting the arc-shaped seat, the driving roller rotates to drive the arc-shaped seat to move, so that the surface of the pipeline can be cleaned and the coupling agent can be applied after the cleaning during the movement of the arc-shaped seat, thereby ensuring that the detection surface is clean, flat and grease-free, and reducing the interference of the ultrasonic detection component on the pipeline detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic flow chart of the method of the present invention.

[0068] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0069] Figure 3 It is a schematic diagram of the inner arc surface structure of the arc-shaped seat of the present invention.

[0070] Figure 4 It is a schematic diagram of the structure of the present invention after overall sectioning Figure 1 .

[0071] Figure 5 It is of the present invention Figure 4 The enlarged schematic diagram of the structure at A in

[0072] Figure 6 It is of the present invention Figure 4 The enlarged schematic diagram of the structure at B in

[0073] Figure 7 It is a schematic diagram of the structure of the present invention after overall sectioning Figure 2 .

[0074] Figure 8 It is of the present invention Figure 7 The enlarged schematic diagram of the structure at C in

[0075] Figure 9 It is a schematic diagram of the structure of the cleaning liquid tank of the present invention after sectioning.

[0076] In the figure: 1, arc-shaped seat; 2, first relief groove; 3, universal wheel; 4, straight rod; 5, first spring; 6, second relief groove; 7, bracket; 8, second spring; 9, motor; 10, drive wheel; 11, cleaning brush; 12, cleaning liquid tank; 1201, first round hole; 13, partition board; 14, sieve mesh; 15, one-way valve; 16, solenoid valve; 17, negative pressure pump; 18, third spring; 1801, chute; 19, recovery tank; 1901, second round hole; 20, arc-shaped fixing plate; 21, sponge brush; 22, ultrasonic detector; 23, electric telescopic rod; 24, push plate; 25, scraping rod; 26, pressure sensor; 27, fourth spring. Specific embodiments

[0077] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0078] As Figures 2 to 9 shown, a pipeline defect stress composite detection device includes two arc-shaped seats 1, one end of the two arc-shaped seats 1 is hinged to each other, and the other end of the two arc-shaped seats 1 is detachably connected by a buckle. The device further includes:

[0079] A drive assembly, installed on the inner arc surface of the arc-shaped seat 1 to drive the arc-shaped seat 1 to move along the pipeline;

[0080] Two cleaning brushes 11, respectively fixed on one side edge of the two arc-shaped seats 1, and the two cleaning brushes 11 form a complete ring after being combined;

[0081] A cleaning liquid circulation assembly, installed on the outer arc surface of the arc-shaped seat 1 to drive the cleaning liquid to be recycled after cleaning through the cleaning brush 11;

[0082] An ultrasonic detection assembly, installed on the other side of the arc-shaped seat 1 to detect the pipeline after cleaning;

[0083] When detecting the stress of the pipeline by ultrasonic waves, it is usually necessary to use a suitable coupling agent, such as water or oil-based gel, on the surface of the pipeline to ensure the effective transmission of ultrasonic waves into the material. When using a coupling agent on the surface of the pipeline, it is necessary to ensure that the detection surface is clean, flat and grease-free to reduce interference with the pipeline detection. Therefore, it is necessary to clean the surface of the pipeline before detection;

[0084] This embodiment of the present invention can solve the above problems. The specific implementation is as follows. The operation is to clamp the two arc-shaped seats 1 outside the steel pipe to be detected. Subsequently, the buckle between the other ends of the two arc-shaped seats 1 is used to position the ends of the two arc-shaped seats 1, so that the two arc-shaped seats 1 are sleeved on the surface of the steel pipe. After the arc-shaped seats 1 are sleeved, the driving components on the inner arc surface of the arc-shaped seats 1 support the steel pipe. The driving components support the arc-shaped seats 1 through rollers, and while supporting the arc-shaped seats 1, the arc-shaped seats 1 are driven to move by driving the rollers to rotate, so that the arc-shaped seats 1 clean the surface of the pipeline while moving and then apply the coupling agent.

[0085] During the movement of the arc-shaped seat 1, the cleaning liquid circulation component transports the cleaning liquid to the cleaning brush 11. After the cleaning liquid is transported to the position of the cleaning brush 11, the cleaning brush 11 moves along with the arc-shaped seat 1 to clean the surface of the steel pipe. After the cleaning is completed, the cleaning liquid sprayed on the surface of the steel pipe is recycled by the cleaning liquid circulation component, so that the cleaning liquid is recycled.

[0086] The ultrasonic detection component is used to apply the coupling agent to the surface of the steel pipe after cleaning and perform ultrasonic detection, which is beneficial to perform ultrasonic detection after cleaning the surface of the steel pipe. And as the arc-shaped seat 1 moves, it can drive the ultrasonic detection component to move synchronously, so that the ultrasonic detection component can perform ultrasonic detection on different positions of the surface of the steel pipe, which is beneficial to improving the accuracy of stress detection of the steel pipe.

[0087] As an alternative embodiment, the driving component includes:

[0088] A plurality of first relief grooves 2, which are divided into two symmetrically arranged groups and are all arranged in a circumferential array on the inner arc surfaces of the two arc-shaped seats 1;

[0089] A plurality of straight rods 4, which are arranged in one-to-one correspondence with the first relief grooves 2 and are respectively slidably inserted into the corresponding first relief grooves 2. Universal wheels 3 are fixed to the ends of all the straight rods 4. The universal wheels 3 are divided into two columns corresponding to the first relief grooves 2, and first springs 5 are fixed between the universal wheels 3 and the inner wall of the corresponding first relief grooves 2;

[0090] A second relief groove 6 is opened on the inner wall of one of the arc-shaped seats 1;

[0091] A bracket 7 is slidably installed inside the second relief groove 6, and a second spring 8 is fixed between the bracket 7 and the inner wall of the second relief groove 6;

[0092] A driving wheel 10 is rotatably installed on the bracket 7;

[0093] A motor 9 is fixed to the side of the bracket 7, and the motor 9 drives the driving wheel 10 to rotate through the output shaft;

[0094] The straight rod 4 can limit the elastic movement trajectory of the universal wheel 3. When the arc-shaped seat 1 is sleeved on the surface of the steel pipe, the universal wheel 3 fits on the surface of the steel pipe. The surface of the steel pipe squeezes the universal wheel 3 to retract, causing the universal wheel 3 to push the first spring 5 to compress, so that the universal wheel 3 remains in extrusion contact with the outside of the steel pipe. The first relief groove 2 can provide a relief space for the retraction of the universal wheel 3. Thus, through the circumferential array arrangement of multiple universal wheels 3, the arc-shaped seat 1 is supported outside the steel pipe by the universal wheels 3;

[0095] The second relief groove 6 is used to provide a relief space for the driving wheel 10. When the driving wheel 10 is squeezed on the surface of the steel pipe, the driving wheel 10 is reversely squeezed by the steel pipe, thereby pushing the second spring 8 to compress, so that the driving wheel 10 squeezes the steel pipe under the action of the second spring 8. After the motor 9 is started, the driving wheel 10 is driven to rotate by the output shaft. After the driving wheel 10 rotates, it rotates along the surface of the steel pipe due to the extrusion action with the surface of the steel pipe, thereby driving the arc-shaped seat 1 to move on the surface of the steel pipe. The universal wheel 3 simultaneously supports the movement of the arc-shaped seat 1 by rolling, so as to realize the driving effect on the arc-shaped seat 1.

[0096] As an alternative embodiment, it further includes:

[0097] Multiple pressure sensors 26, which are arranged corresponding to one group of the first relief grooves 2, and the pressure sensors 26 are fixed on the side wall of the universal wheel 3 inside the corresponding first relief groove 2;

[0098] Multiple fourth springs 27, which are arranged in one-to-one correspondence with the pressure sensors 26, and are fixed between the corresponding pressure sensors 26 and the side of the first relief groove 2;

[0099] Multiple groups of scraping rods 25, with two scraping rods 25 in a group. Multiple groups of scraping rods 25 are arranged corresponding to the row of universal wheels 3 close to the ultrasonic detection assembly, and the scraping rods 25 in the same group are symmetrically fixed on both sides of the corresponding universal wheel 3;

[0100] When the universal wheel 3 moves inward to the first relief groove 2 under the extrusion of the steel pipe surface, the universal wheel 3 drives the pressure sensor 26 to move synchronously, causing the fourth spring 27 to be compressed during the movement of the pressure sensor 26. The compressed fourth spring 27 generates an elastic force, thereby applying a pressure to the pressure sensor 26 through the elastic force of the fourth spring 27, enabling the pressure sensor 26 to detect the applied pressure. By using different pressure sensors 26 to detect the pressure on different universal wheels 3, when there is a protrusion on the surface of the steel pipe, the protrusion position pushes the universal wheel 3 to move a greater distance inward to the first relief groove 2, thereby further compressing the fourth spring 27, increasing the pressure on the pressure sensor 26. When there is a protrusion on the surface of the steel pipe, the pressure information value detected by the pressure sensor 26 on the corresponding universal wheel 3 changes, and vice versa, thus identifying the defective position on the surface of the steel pipe. This is beneficial for detecting the defective position on the surface of the steel pipe during the process of the arc-shaped seat 1 moving to clean the steel pipe, and cleaning the surface of the steel pipe with the cleaning brush 11, which is beneficial for cleaning the protrusions at the stain position, thereby avoiding interference from the protrusions at the stain position to the detection of the defective position on the surface of the steel pipe.

[0101] As an alternative embodiment, the cleaning liquid circulation assembly includes:

[0102] Two cleaning liquid tanks 12, which are respectively fixed on the outer arc surfaces of the two arc-shaped seats 1;

[0103] Two filter and exhaust components, which are respectively installed inside the two cleaning liquid tanks 12, and are used for filtering the recycled liquid entering the inside of the cleaning liquid tanks 12 to separate impurities and discharge the gas mixed in the recycled cleaning liquid;

[0104] Two recovery tanks 19, which are respectively opened inside the two arc-shaped seats 1. A number of second round holes 1901 are arranged in an array on the inner walls of the two recovery tanks 19, and the second round holes 1901 communicate the recovery tanks 19 with the inner arc surfaces of the arc-shaped seats 1;

[0105] Two negative pressure pumps 17, which are respectively fixed on the side walls of the two cleaning liquid tanks 12. The output ends of the negative pressure pumps 17 are communicated with the filter and exhaust components, and the input ends of the negative pressure pumps 17 are communicated with the recovery tanks 19;

[0106] The interior of the cleaning liquid tank 12 stores the cleaning liquid. The cleaning liquid reaches the position of the cleaning brush 11 through the filter and exhaust assembly, so that the cleaning liquid flows through the cleaning brush 11 to the surface of the steel pipe, and the surface of the steel pipe is scrubbed by the cleaning brush 11. After the cleaning liquid flows to the surface of the steel pipe, with the movement of the arc-shaped seat 1, the cleaning liquid reaches the middle position of the arc-shaped seat 1. Under the negative pressure of the negative pressure pump 17, a strong negative pressure is generated inside the recovery tank 19. Thus, under the action of the negative pressure, the cleaning liquid on the surface of the steel pipe is absorbed through the second round hole 1901 and reaches the inside of the recovery tank 19, and then reaches the inside of the filter and exhaust assembly through the negative pressure pump 17. The filter and exhaust assembly processes the recovered cleaning liquid, discharges the gas simultaneously inhaled during the recovery process, and filters the cleaning liquid, so that the impurities mixed in during the cleaning of the surface of the steel pipe are filtered and recovered, and the filtered cleaning liquid re-enters the cleaning brush 11 to clean the surface of the steel pipe, thereby avoiding the situation that the cleaning liquid adhering to the surface of the steel pipe during cleaning drips and interferes with the detection of the steel pipe.

[0107] As an alternative embodiment, the filter and exhaust assembly includes:

[0108] A partition plate 13, fixed inside the cleaning liquid tank 12. The partition plate 13 divides the interior of the cleaning liquid tank 12 into a liquid discharge chamber and an exhaust chamber. A plurality of first round holes 1201 are formed through the side of the liquid discharge chamber facing the cleaning brush 11, and the first round holes 1201 connect the cleaning brush 11 with the liquid discharge chamber;

[0109] A screen 14, fixed inside the exhaust chamber. The screen 14 divides the exhaust chamber into an impurity chamber and a filtering chamber;

[0110] A one-way valve 15, fixedly penetrating through the side of the partition plate 13. The one-way valve 15 unidirectionally connects the filtering chamber with the liquid discharge chamber;

[0111] An electromagnetic valve 16, fixedly penetrating through the side of the cleaning liquid tank 12. The electromagnetic valve 16 connects the impurity chamber with the outside;

[0112] Under the action of the negative pressure pump 17, the recovered cleaning liquid reaches the inside of the impurity chamber. The cleaning liquid flows inside the impurity chamber towards the inside of the filtering chamber. During the flowing process, it passes through the screen 14, so that the impurities in the cleaning liquid are filtered and separated and remain inside the impurity chamber, while the clean liquid passes through the screen 14 and enters the inside of the filtering chamber. When the negative pressure pump 17 transports the cleaning liquid into the impurity chamber, the solenoid valve 16 is in the closed state. At this time, under the action of the negative pressure pump 17, the internal pressure of the impurity chamber continuously increases. Thus, under the action of the pressure, the cleaning liquid inside the filtering chamber continuously enters the inside of the drain chamber through the one-way valve 15. Subsequently, the cleaning liquid reaches the cleaning brush 11 through the first round hole 1201 inside the drain chamber for cleaning. When the liquid volume inside the filtering chamber decreases, the solenoid valve 16 is controlled to open, so that the gas that enters the impurity chamber together with the cleaning liquid is discharged by the solenoid valve 16, thereby reducing the air pressure inside the impurity chamber. Thus, it is avoided that the air pressure inside the impurity chamber continuously increases, resulting in the liquid volume inside the filtering chamber decreasing and then the gas entering the drain chamber through the one-way valve 15, thereby causing the gas to enter the cleaning brush 11 and affecting the cleaning of the steel pipe surface.

[0113] As an alternative embodiment, the ultrasonic detection assembly includes:

[0114] Two arc-shaped fixing plates 20, symmetrically fixed on the side edges of the arc-shaped seat 1, and sponge brushes 21 are fixed on the opposite sides of the two arc-shaped fixing plates 20;

[0115] A plurality of ultrasonic detectors 22, fixedly arranged on the side edge after the combination of the two arc-shaped fixing plates 20 in a circumferential array;

[0116] The arc-shaped fixing plate 20 can install the sponge brush 21 and the ultrasonic detector 22. The sponge brush 21 can apply the coupling agent to the surface of the steel pipe. The coupling agent can be absorbed inside the sponge brush 21 and can be replenished through an external coupling agent storage tank. The coupling agent is applied to the surface of the steel pipe after cleaning. The ultrasonic detector 22 can detect the stress on the surface of the steel pipe. The ultrasonic detector 22 can move along with the arc-shaped seat 1, which is beneficial to detecting different positions on the surface of the steel pipe, thereby improving the accuracy of stress detection on the surface of the steel pipe.

[0117] As an alternative embodiment, it further includes:

[0118] A plurality of sliding grooves 1801 are respectively opened on the side edges of the two arc-shaped seats 1, and a third spring 18 is fixed between the inner wall of the sliding groove 1801 and the cleaning liquid tank 12;

[0119] A push plate 24 is fixed on the side edge of the cleaning liquid tank 12;

[0120] The electric telescopic rod 23 is fixed to the side of the arc-shaped seat 1, and the end of the telescopic rod of the electric telescopic rod 23 pushes the push plate 24 to move;

[0121] After the electric telescopic rod 23 is started, it can push the push plate 24 to move through the telescopic rod. After the push plate 24 moves, it drives the cleaning liquid tank 12 to move, thereby pushing the cleaning brush 11 to move, so that the cleaning brush 11 rotates around the surface of the steel pipe. At the same time, the movement of the cleaning liquid tank 12 pushes the third spring 18 to compress. After the telescopic rod of the electric telescopic rod 23 is reset, under the elastic force of the third spring 18, it pushes the cleaning liquid tank 12 to reset, thereby driving the cleaning liquid tank 12 and the cleaning brush 11 to rotate reciprocally on the surface of the steel pipe, which is beneficial to improving the cleaning effect on the surface of the steel pipe.

[0122] Such as Figure 1 shown in a detection control method of a pipeline defect stress composite detection device, a controller is fixed on the side of the arc-shaped seat 1. The control method includes the following steps:

[0123] The controller receives a plurality of pressure information detected and obtained by each pressure sensor 26;

[0124] The controller compares each pressure information. When it detects that the value of any one of the pressure information is different from the values of the other pressure information, the controller generates reciprocating drive control information, and the reciprocating drive information is used to control the drive assembly to start reciprocating drive;

[0125] The controller sends the reciprocating drive control information to the drive assembly to control the drive assembly to start reciprocating drive;

[0126] A plurality of pressure sensors 26 detect the pressure received, and send the detected pressure information to the controller. After the controller receives the pressure information, it compares each pressure information. When it detects that any one of the pressure information is different from the other pressure air pressure information, the controller generates reciprocating drive control information, and sends the reciprocating drive control information to the drive assembly to control the drive assembly to start driving the arc-shaped seat 1 to move reciprocally, and repeatedly detect the position where the detected pressure information value is different, and stop the reciprocating drive after reciprocating and moving a specified number of times, and control the drive assembly to resume the original drive path, driving the arc-shaped seat 1 to continue to move for the detection of the surface of the steel pipe;

[0127] On the one hand, the accuracy of the stress detection on the surface of the steel pipe is improved by repeatedly detecting the detected defect positions through reciprocating detection. On the other hand, through the reciprocating movement of the arc-shaped seat 1, the detected defect positions of the cleaning brush 11 are driven to be repeatedly cleaned, which is beneficial to avoiding the situation that the stains not completely cleaned by one cleaning interfere with the detection results, thereby being beneficial to improving the accuracy of the stress detection on the surface of the steel pipe.

[0128] As an alternative embodiment, a liquid flow sensor is installed on the side wall of the screen 14, and further includes:

[0129] The controller receives the liquid flow information generated by the liquid flow sensor when detecting the liquid flow;

[0130] The controller generates closing control information according to the liquid flow information, and the closing control information is used to control the solenoid valve 16 to close;

[0131] The controller sends the closing control information to the solenoid valve 16 to control the solenoid valve 16 to close;

[0132] The liquid flow sensor detects the liquid at the position of the screen 14. After the cleaning liquid fills the inside of the filter chamber, the cleaning liquid overflows from the inside of the filter chamber to reach the position of the screen 14. After the liquid flow sensor detects the presence of the liquid, it generates liquid flow information and sends the liquid flow information to the controller. After receiving the liquid flow information, the controller generates closing control information according to the liquid flow information and sends the closing control information to the solenoid valve 16 to control the solenoid valve 16 to close. After the solenoid valve 16 closes, as the negative pressure pump 17 continuously transports the recovered cleaning liquid into the impurity chamber, the pressure inside the impurity chamber increases. The increased pressure exerts pressure on the connected filter chamber, causing the filtered cleaning liquid inside the filter chamber to pass through the one-way valve 15 under pressure and reach the inside of the drain chamber, thereby realizing the filtration of the cleaning liquid. When the liquid flow sensor detects that there is no liquid flow at the position of the screen 14, that is, no liquid flow information is generated anymore. At this time, the solenoid valve 16 returns to the open state, and the gas inside the impurity chamber is discharged from the solenoid valve 16 to restore the pressure inside the impurity chamber.

[0133] As an alternative embodiment, a pressure sensor is installed inside the impurity chamber, and further includes:

[0134] The controller receives the air pressure information P detected by the pressure sensor;

[0135] The controller brings the air pressure information P and the standard air pressure P0 input by the controller into the judgment formula P > P0. When the judgment result is in line, the controller generates opening control information according to the judgment result, and the opening control information is used to control the solenoid valve 16 to open;

[0136] The controller sends the opening control information to the solenoid valve 16 to control the solenoid valve 16 to open;

[0137] The air pressure sensor can detect the air pressure inside the impurity chamber and send the detected air pressure information P to the controller. The staff can manually input the standard air pressure P0 through the controller and substitute it into the judgment formula P > P0. When the air pressure information P is greater than the standard air pressure P0, the air pressure inside the impurity chamber is too high. At this time, the controller generates an opening control signal and sends the opening control signal to the solenoid valve 16 to control the opening of the solenoid valve 16, thereby preventing the air pressure inside the impurity chamber from being too high and avoiding the situation that the pressure exerted on the cleaning liquid increases under the action of the excessive air pressure, resulting in excessive discharge of the cleaning liquid to the cleaning brush 11.

[0138] The working principle of the present invention: Operate to clamp the two arc-shaped seats 1 outside the steel pipe to be detected. Subsequently, position the ends of the two arc-shaped seats 1 through the buckle between the other ends of the two arc-shaped seats 1, so that the two arc-shaped seats 1 are sleeved on the surface of the steel pipe. After the arc-shaped seats 1 are sleeved, the driving components on the inner arc surface of the arc-shaped seats 1 support the steel pipe. The driving components support the arc-shaped seats 1 through rollers, and while supporting the arc-shaped seats 1, drive the arc-shaped seats 1 to move by driving the rollers to rotate, so that the arc-shaped seats 1 clean the surface of the pipeline while moving and then apply a coupling agent.

[0139] During the movement of the arc-shaped seats 1, the cleaning liquid circulation component conveys the cleaning liquid to the cleaning brush 11. After the cleaning liquid is conveyed to the position of the cleaning brush 11, the cleaning brush 11 cleans the surface of the steel pipe as it moves with the arc-shaped seats 1. After the cleaning is completed, the cleaning liquid sprayed on the surface of the steel pipe is recovered through the cleaning liquid circulation component, enabling the cleaning liquid to be recycled.

[0140] The ultrasonic detection component is used to apply a coupling agent to the surface of the steel pipe after cleaning and perform ultrasonic detection, which is conducive to ultrasonic detection after cleaning the surface of the steel pipe. As the arc-shaped seats 1 move, the ultrasonic detection component can be driven to move synchronously, enabling the ultrasonic detection component to perform ultrasonic detection on different positions of the surface of the steel pipe, which is conducive to improving the accuracy of stress detection of the steel pipe.

[0141] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A pipeline defect stress composite detection device, comprising two arc seats (1), one ends of the two arc seats (1) are hinged to each other, and the other ends of the two arc seats (1) are detachably connected by a buckle, characterized in that: Also includes: A driving assembly, mounted on the inner arc surface of the arc seat (1) to drive the arc seat (1) to move along the pipeline; Two cleaning brushes (11) are respectively fixed on one side of the two arc-shaped seats (1), and the two cleaning brushes (11) form a complete ring when combined; A cleaning liquid circulation component is mounted on the outer arc surface of the arc-shaped seat (1) to drive the cleaning liquid to be recycled after cleaning through the cleaning brush (11); An ultrasonic detection component is installed on the other side of the arc-shaped seat (1) to detect the pipeline after cleaning; The drive assembly comprises: A plurality of first clearance grooves (2), which are divided into two symmetrically arranged groups and are all arranged in a circular array on the inner arc surfaces of the two arc-shaped seats (1); A plurality of straight rods (4) are arranged one by one corresponding to the first clearance grooves (2) and are respectively slidably inserted into the corresponding first clearance grooves (2); universal wheels (3) are fixed to the ends of all the straight rods (4); the universal wheels (3) are divided into two rows corresponding to the first clearance grooves (2); and first springs (5) are fixed between the universal wheels (3) and the inner walls of the corresponding first clearance grooves (2); A second clearance groove (6) is formed on the inner wall of one of the arc-shaped seats (1); A bracket (7) is slidably mounted inside the second clearance groove (6), and a second spring (8) is fixed between the bracket (7) and the inner wall of the second clearance groove (6); A driving wheel (10) rotatably mounted on the bracket (7); A motor (9) is fixed on a side of the bracket (7), and the motor (9) drives the driving wheel (10) to rotate via an output shaft; Also includes: A plurality of pressure sensors (26) are arranged corresponding to one group of the first clearance grooves (2), and the pressure sensors (26) are fixed on the side wall of the universal wheel (3) corresponding to the inside of the first clearance groove (2); A plurality of fourth springs (27), arranged one-to-one corresponding to the pressure sensors (26), and fixed between the corresponding pressure sensors (26) and the side edge of the first clearance groove (2); A plurality of groups of scraping rods (25), two of the scraping rods (25) forming one group, the plurality of groups of scraping rods (25) being arranged corresponding to a row of the universal wheels (3) close to the ultrasonic detection assembly, and the scraping rods (25) in the same group being symmetrically fixed to two sides of the corresponding universal wheels (3).

2. A pipeline defect stress composite detection device according to claim 1, characterized in that: The cleaning liquid circulation component comprises: Two cleaning liquid tanks (12), the two cleaning liquid tanks (12) being respectively fixed on the outer arc surfaces of the two arc-shaped seats (1); Two filtering and exhausting components, respectively installed inside the two cleaning liquid tanks (12), for filtering the recovered liquid entering the cleaning liquid tank (12) to separate impurities and exhaust the gas mixed in the recovered cleaning liquid; Two recovery grooves (19) are respectively provided inside the two arc-shaped seats (1), and a plurality of second circular holes (1901) are provided in an array on the inner walls of the two recovery grooves (19), wherein the second circular holes (1901) are connected between the recovery grooves (19) and the inner arc surface of the arc-shaped seat (1); Two negative pressure pumps (17) are respectively fixed on the side walls of the two cleaning liquid tanks (12); the output end of the negative pressure pump (17) is connected to the filter exhaust assembly, and the input end of the negative pressure pump (17) is connected to the recovery tank (19).

3. A pipeline defect stress composite detection device according to claim 2, characterized in that: The filter exhaust assembly comprises: a partition (13) fixed to the interior of the cleaning liquid tank (12), the partition (13) dividing the interior of the cleaning liquid tank (12) into a drainage chamber and an exhaust chamber, a plurality of first circular holes (1201) penetrating through the side of the drainage chamber facing the cleaning brush (11), the first circular holes (1201) connecting the cleaning brush (11) and the drainage chamber; A screen (14) is fixed inside the exhaust chamber, the screen (14) dividing the exhaust chamber into an impurity chamber and a filter chamber; A one-way valve (15) is fixed through a side edge of the partition (13), wherein the one-way valve (15) connects the filter chamber and the drainage chamber in one direction; The solenoid valve (16) is fixed through the side of the cleaning liquid tank (12), and the solenoid valve (16) connects the impurity chamber with the outside.

4. A pipeline defect stress composite detection device according to claim 3, characterized in that: The ultrasonic detection assembly comprises: Two arc-shaped fixing plates (20) are symmetrically fixed on the side edges of the arc-shaped seat (1), and sponge brushes (21) are fixed on opposite sides of the two arc-shaped fixing plates (20); A plurality of ultrasonic detectors (22) are fixed in a circular array on the sides of the two arc-shaped fixing plates (20) that are combined.

5. A pipeline defect stress composite detection device according to claim 3, characterized in that: Also includes: A plurality of slide grooves (1801) are respectively provided on the sides of the two arc-shaped seats (1), and a third spring (18) is fixed between the inner wall of the slide groove (1801) and the cleaning liquid tank (12); A push plate (24) fixed to a side edge of the cleaning liquid tank (12); The electric telescopic rod (23) is fixed on the side of the arc-shaped seat (1), and the telescopic rod end of the electric telescopic rod (23) pushes the push plate (24) to move.

6. A detection control method for a pipeline defect stress composite detection device, applicable to a pipeline defect stress composite detection device as claimed in any one of claims 3 to 5, characterized in that: A controller is fixed on the side of the arc-shaped seat (1), and the control method comprises the following steps: The controller receives a plurality of pressure information detected and acquired by each of the pressure sensors (26); The controller compares each of the pressure information, and when detecting that the value of any of the pressure information is different from the values ​​of the other pressure information, the controller generates reciprocating drive control information, and the reciprocating drive control information is used to control the drive component to start reciprocating drive; The controller sends the reciprocating drive control information to the drive component to control the drive component to start the reciprocating drive.

7. The detection control method of a pipeline defect stress composite detection device according to claim 6 is characterized in that: A liquid flow sensor is installed on the side wall of the screen (14), and further comprises: The controller receives liquid flow information generated by the liquid flow sensor when detecting liquid flow; The controller generates closing control information according to the liquid flow information, wherein the closing control information is used to control the closing of the solenoid valve (16); The controller sends the closing control information to the solenoid valve (16) to control the solenoid valve (16) to close.

8. The detection control method of a pipeline defect stress composite detection device according to claim 6 is characterized in that: The impurity chamber is provided with an air pressure sensor, and further comprises: The controller receives air pressure information P detected by the air pressure sensor; The controller compares the air pressure information with the standard air pressure P0 input by the controller and puts it into the judgment formula P>P0. When the judgment result is consistent, the controller generates opening control information according to the judgment result, and the opening control information is used to control the opening of the solenoid valve (16); The controller sends the opening control information to the solenoid valve (16) to control the solenoid valve (16) to open.

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