CN110822214B - Pipeline detection device - Google Patents
Pipeline detection device Download PDFInfo
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- CN110822214B CN110822214B CN201911081540.6A CN201911081540A CN110822214B CN 110822214 B CN110822214 B CN 110822214B CN 201911081540 A CN201911081540 A CN 201911081540A CN 110822214 B CN110822214 B CN 110822214B
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- pipeline
- air duct
- wall
- groove
- unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/30—Constructional aspects of the propulsion means, e.g. towed by cables
- F16L55/32—Constructional aspects of the propulsion means, e.g. towed by cables being self-contained
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/40—Constructional aspects of the body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
Abstract
The invention discloses a pipeline detection device, and belongs to the technical field of pipeline detection. The air duct is arranged at one end of the frame body, the power unit is arranged on the air duct, and the power supply supplies power to the power unit under the control of the controller, so that the propeller in the power unit can rotate in the medium to obtain the propelling force applied by the medium, and the whole pipeline detection device is pushed to move. Therefore, the device can travel in the pipeline only by means of the power provided by the power unit without the aid of a high-pressure medium, and the defects on the pipeline wall can be effectively detected.
Description
Technical Field
The invention relates to the technical field of pipeline detection, in particular to a pipeline detection device.
Background
Defects in pipelines need to be regularly detected before and during the production of long-distance oil and gas pipelines, and the defects on the pipeline walls are usually detected by putting a pipeline detection device into the pipelines.
The pipeline detection device commonly used at present comprises a detection unit and a power supply unit, wherein the power supply unit is used for supplying power to the detection unit, the detection unit advances by means of the pressure of a medium in a pipeline, and particularly, in the use process of the pipeline, as the medium such as high-pressure natural gas flows in the pipeline, the flowing medium applies pressure along the flowing direction to the pipeline detection device, and the pressure can push the pipeline detection device to move so as to facilitate the detection unit to detect.
Before the pipeline is put into production or in other special production processes, when no high-pressure medium exists in the pipeline, the pipeline detection device cannot move in the pipeline, and therefore defects on the pipeline wall cannot be effectively detected.
Disclosure of Invention
The embodiment of the invention provides a pipeline detection device, which can solve the problem that the defects on the pipeline wall cannot be effectively detected when high-pressure media do not exist in the pipeline in the conventional pipeline detection device. The technical scheme is as follows:
there is provided a pipeline inspecting apparatus, including: the device comprises a frame body, a power unit, at least one detection unit and a control unit;
the bottom plate of the frame body is connected with a plurality of wheel sets, one end of the frame body is provided with an air duct, the outer wall of the air duct is provided with a plurality of supporting components, and each supporting component is used for contacting with the inner wall of the pipeline;
the power unit comprises a motor, a transmission mechanism and a propeller, wherein the motor is arranged on the outer wall of the air duct, the propeller is rotatably connected to the inner wall of the air duct, and the transmission mechanism penetrates through an opening in the wall of the air duct;
the output shaft of the motor is connected with the input end of the transmission mechanism, the propeller comprises a hub and a plurality of blades which are radially connected to the hub along the circumferential direction, the end parts of the plurality of blades are all connected with the output end of the transmission mechanism, and the transmission mechanism is used for driving the propeller to rotate in a medium so that the medium applies propulsive force to the propeller;
at least one detection unit is connected to the frame body and used for detecting the pipeline;
the control unit is arranged on the bottom plate of the frame body and comprises a power supply and a controller electrically coupled with the power supply, the power supply is electrically coupled with the power unit and each detection unit, and the controller is electrically coupled with the power unit and each detection unit.
In one possible design, the transmission mechanism includes a first gear and a second gear which are meshed with each other, the output shaft of the motor is coupled with the shaft of the first gear, and the ends of the plurality of blades are connected with the second gear.
In one possible design, the power unit further includes: an annular retainer sleeve;
the ends of a plurality of blades of the propeller are connected with the inner wall of the fixed sleeve; the second gear is sleeved on the fixed sleeve.
In one possible design, a first mounting ring and a second mounting ring are arranged in the air duct;
the fixing sleeve is arranged between the first mounting ring and the second mounting ring, and two side walls of the fixing sleeve are provided with a first annular groove and a second annular groove;
a third groove matched with the first groove is formed in the surface, adjacent to the fixed sleeve, of the first mounting ring, and a ball is arranged between the first groove and the third groove;
and a fourth groove matched with the second groove is arranged on the surface of the second mounting ring adjacent to the fixed sleeve, and a ball is arranged between the second groove and the fourth groove.
In one possible design, the air duct comprises a cylindrical portion and a hollow circular truncated cone portion;
the first end of the circular table part is connected with the cylindrical part, and the diameter of the second end of the circular table part is larger than that of the first end;
a plurality of supporting assemblies are uniformly arranged on the outer walls of the cylindrical part and the circular table part along the circumferential direction respectively.
In one possible design, each of the support assemblies includes: the connecting arm, the rolling ball seat and the rolling ball;
the first end of the connecting arm is connected to the air duct, and the second end of the connecting arm is connected to the rolling ball seat;
the rolling ball seat is internally provided with a rolling ball which is used for rolling along the inner wall of the pipeline.
In one possible design, a support ring is arranged on the frame body;
the detection unit includes: a magnetizing assembly and a leakage magnetic detecting element;
the magnetizing assembly includes: a Y-shaped supporting rod, an electromagnet and a magnetic conducting rod;
the first end of the supporting rod is connected to the outer wall of the supporting ring;
the electromagnet is detachably connected to the second end part of the supporting rod, and the magnetic conducting rod is telescopically connected to the electromagnet;
the leakage flux detecting member is detachably coupled to the third end portion of the support bar.
In a possible design, the electromagnet is provided with a magnetic conduction column, the magnetic conduction column is provided with a buffer slot, an elastic part is arranged in the buffer slot, and the free end of the elastic part is connected with the magnetic conduction rod.
In one possible design, the pipeline inspection device further includes: a brake unit electrically coupled to the control unit;
the brake unit includes a plurality of brake assemblies;
each of the brake assemblies includes: the telescopic rod and the arc-shaped positioning plate;
the telescopic rod is telescopically connected to the outer wall of the air duct;
the arc-shaped positioning plate is connected with the end part of the telescopic rod and used for abutting against the inner wall of the pipeline.
In one possible design, the rack further comprises: a first link, a second link, and a third link;
the first connecting rod is connected with the bottom plate and the air duct;
the second connecting rod is connected with the bottom plate and the detection unit;
the third connecting rod is connected with the air duct and the detection unit.
The air duct is arranged at one end of the frame body, the power unit is arranged on the air duct, and the power supply supplies power to the power unit under the control of the controller, so that the propeller in the power unit can rotate in the medium to obtain the propelling force applied by the medium, and the whole pipeline detection device is pushed to move. Therefore, the device can travel in the pipeline only by means of the power provided by the power unit without the aid of a high-pressure medium, and the defects on the pipeline wall can be effectively detected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pipeline detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power unit 2 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power unit 2 according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a support assembly 14 according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a magnetizing assembly 31 according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a brake unit 5 according to an embodiment of the present invention;
fig. 7 is an electrical schematic diagram of a pipeline detecting device according to an embodiment of the present invention.
The reference numerals for the various parts in the drawings are illustrated below:
1-a frame body;
11-a base plate;
12-a wheel set;
13-an air duct;
131-a first mounting ring;
1311-third groove;
132-a second mounting ring;
1321-a fourth groove;
133-a cylindrical section;
134-a circular table portion;
14-a support assembly;
141-connecting arm, 142-roller seat, 143-roller ball;
15-a support ring;
16-a first link;
17-a second link;
18-a third link;
2-a power unit;
21-a motor;
22-a transmission mechanism;
221-first gear, 222-second gear;
23-a propeller;
231-hub, 232-blades;
24-fixing the sleeve;
241-a first groove, 242-a second groove;
3-a detection unit;
31-a magnetising assembly;
311-support rods;
312-an electromagnet;
313-a flux bar;
314-magnetically conductive posts;
3141-buffer tank;
315-an elastic member;
32-a leakage magnetic detecting element;
4-a control unit;
41-power supply, 42-controller;
5-a braking unit;
51-a brake assembly;
511-a telescopic rod and 512-an arc positioning plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a pipeline detection device according to an embodiment of the present invention, please refer to fig. 1, where the pipeline detection device includes: the device comprises a frame body 1, a power unit 2, at least one detection unit 3 and a control unit 4; a plurality of wheel sets 12 are connected to a bottom plate 11 of the frame body 1, an air duct 13 is arranged at one end of the frame body 1, a plurality of support assemblies 14 are arranged on the outer wall of the air duct 13, and each support assembly 14 is used for contacting with the inner wall of a pipeline; the power unit 2 comprises a motor 21, a transmission mechanism 22 and a propeller 23, wherein the motor 21 is arranged on the outer wall of the air duct 13, the propeller 23 is rotatably connected to the inner wall of the air duct 13, and the transmission mechanism 22 penetrates through an opening on the wall of the air duct 13; the output shaft of the motor 21 is connected with the input end of the transmission mechanism 22, the propeller 23 includes a hub 231 and a plurality of blades 232 radially connected to the hub 231 along the circumferential direction, the ends of the plurality of blades 232 are all connected with the output end of the transmission mechanism 22, the transmission mechanism 22 is used for driving the propeller 23 to rotate in a medium, so that the medium applies a propelling force to the propeller 23; at least one detection unit 3 is connected to the frame body 1 and used for detecting the pipeline; the control unit 4 is disposed on the bottom plate 11 of the frame 1, the control unit 4 includes a power source 41 and a controller 42 electrically coupled to the power source 41, the power source 41 is electrically coupled to the power unit 2 and each of the detecting units 3, and the controller 42 is electrically coupled to the power unit 2 and each of the detecting units 3.
The working principle of the device is described in detail below:
after pushing the device into the pipeline, the power supply 41 in the control unit 4 supplies electrical energy to the electrical components; the controller 42 is used for controlling the starting or stopping of each electric element; on the basis of the power provided by the power unit 2, the device travels in the pipeline under the support of each support component 14 and a plurality of wheel sets 12, each wheel set 12 comprises a rotating shaft and wheels arranged at two ends of the rotating shaft, and the rotating shaft is rotatably connected to the bottom of the bottom plate 11; the detection unit 3 detects the pipe.
Specifically, after the controller 42 controls the motor 21 in the power unit 2 to be turned on, the motor 21 drives the transmission mechanism 22 to operate, the transmission mechanism 22 transmits the rotation motion of the motor 21 to the propeller 23, the blades 232 of the propeller 23 rotate in the medium to drive the medium to move, in the process that the medium flows from the first surface to the second surface of the propeller 23, the propeller 23 applies a force to the medium, the reaction force applied to the second surface by the medium is a propelling force for pushing the propeller 23 to advance, so that the propeller 23 moves along the direction from the second surface to the first surface, and the device is driven to move, wherein the medium may be air, natural gas, oil or the like. While the apparatus is traveling, the detection unit 3 detects the pipe under the control of the controller 42.
Through setting up dryer 13 in the one end of support body 1, set up power unit 2 on dryer 13, under the control of controller 42, power 41 supplies power for power unit 2 for screw 23 in power unit 2 can be through rotating in the medium, obtains the propulsive force that the medium was applyed, in order to promote whole pipeline detection device's removal. Therefore, the device can travel in the pipeline only by the power provided by the power unit 2 without the aid of high-pressure media, and effective detection of defects on the pipeline wall is realized.
The following details the structure of each part of the device:
structure and working principle of power unit 2
Fig. 2 is a schematic structural diagram of a power unit 2 according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a power unit 2 according to an embodiment of the present invention, and referring to fig. 2 and fig. 3, the power unit 2 includes a motor 21, a transmission mechanism 22, and a propeller 23. In a possible design, the transmission mechanism 22 includes a first gear 221 and a second gear 222 engaged with each other, the output shaft of the motor 21 is coupled with the shaft of the first gear 221, and the ends of the plurality of blades 232 are connected with the second gear 222.
The diameter of the first gear 221 may be smaller than that of the second gear 222, so that the angular speed of the rotation of the second gear 222 and the propeller 23 is smaller than that of the rotation of the first gear 221, thereby achieving the effect of speed reduction.
The blades 232 of the propeller 23 are uniformly distributed along the circumferential direction of the hub 231 at the center, and have uniform shapes, so that the thrust force exerted on each blade 232 in the rotating process is equal, and the power provided by the power unit 2 has stability. Wherein, the hub 231 has a cylindrical outer wall, and the number of the blades 232 can be set according to the requirement, for example, can be 2 ~ 8. The first and second faces of each blade 232 are curved and the first face is convex to generate thrust during rotation of the propeller 23. On this basis, the device advances in the direction of the second face of the propeller 23 towards the first face, so that the mounting direction of the propeller 23 can be set as required by the direction of travel of the device.
The motor 21 can be provided with a motor box to protect the motor and the transmission mechanism 22.
In one possible design, the power unit 2 further includes: an annular retainer sleeve 24; the ends of the blades 232 of the propeller 23 are connected with the inner wall of the fixed sleeve 24; the second gear 222 is sleeved on the fixing sleeve 24.
The plurality of blades 232 of the propeller 23 can be fixed on the inner wall of the fixing sleeve 24 by welding, bonding, etc., and the fixing sleeve 24 plays a role in driving the propeller 23 to rotate. The second gear 222 has a through hole with a diameter equal to the outer diameter of the fixing sleeve 24, so that the second gear 222 can be sleeved on the fixing sleeve 24, and the second gear 222 can be integrally formed with the fixing sleeve 24 or connected by key connection or the like, which is not limited in this embodiment.
In a possible design, a first mounting ring 131 and a second mounting ring 132 are arranged in the air duct 13; the fixing sleeve 24 is disposed between the first mounting ring 131 and the second mounting ring 132, and two side walls of the fixing sleeve 24 are provided with a first annular groove 241 and a second annular groove 242; a third groove 1311 matched with the first groove 241 is arranged on the surface of the first mounting ring 131 adjacent to the fixed sleeve 24, and balls are arranged between the first groove 241 and the third groove 1311; the surface of the second mounting ring 132 adjacent to the fixing sleeve 24 is provided with a fourth groove 1321 matched with the second groove 242, and a ball is arranged between the second groove 242 and the fourth groove 1321.
The first mounting ring 131 and the second mounting ring 132 have the same outer diameter, and may be fixed on the inner wall of the air duct 13 by welding, bonding, or the like, and a gap between the first mounting ring 131 and the second mounting ring 132 is opposite to an opening on the air duct 13, so as to ensure the engagement between the first gear 221 and the second gear 222 sleeved outside the propeller 23.
The quantity and the diameter of ball can be according to the size setting of each recess, and a plurality of balls evenly distributed in each recess, the inside wall of each recess all is through polishing processing to reduce the friction, and this first retainer ring 131, this second retainer ring 132, this fixed cover 24 play the effect that makes this screw 23 rotationally connect on the inner wall of dryer 13 with the ball jointly.
In the process that the first gear 221 drives the second gear 222 to rotate and the second gear 222 drives the fixing sleeve 24 and the propeller 23 to rotate, the first mounting ring 131 and the second mounting ring 132 are kept stationary, the fixing sleeve 24 rotates relative to the first mounting ring 131 and the second mounting ring 132, and friction among the fixing sleeve 24, the first mounting ring 131 and the second mounting ring 132 is reduced through rolling of balls, so that the rotation of the propeller 23 is facilitated.
In one possible design, the air duct 13 comprises a cylindrical portion 133 and a hollow circular truncated cone portion 134; a first end of the circular truncated cone 134 is connected to the cylindrical portion 133, and a second end of the circular truncated cone 134 has a diameter larger than that of the first end; a plurality of support members 14 are uniformly provided on the outer walls of the cylindrical portion 133 and the circular truncated portion 134 in the circumferential direction, respectively.
The edges of each supporting component 14 and each detecting unit 3 in the device form a circle with the same inner diameter as the pipeline to be detected, so that the end parts of each supporting component 14 and each detecting unit 3 can be abutted against the inner wall of the pipeline after the device is pushed into the pipeline, and the advancing stability of the device and the accuracy of a detection result are improved.
During the running process of the device, the medium flows from the second end with the larger diameter of the circular table part 134 to the first end of the circular table part 134 and then flows into the cylindrical part 133, and the arrangement of the circular table part 134 increases the flow rate of the medium in the cylindrical part 133, so that the thrust is favorably acquired.
The plurality of support members 14 on the outer walls of the cylindrical portion 133 and the circular truncated cone portion 134 are uniformly arranged in the circumferential direction, which maintains the stability of the device during use and prevents the device from rolling over in the duct. The number of the supporting assemblies 14 may be set according to needs, for example, the number of the cylindrical portions 133 may be 3 to 6, the number of the circular truncated cone portions 134 may be 3 to 6, and the number of the supporting assemblies 14 of the cylindrical portions 133 may be equal to or different from the number of the circular truncated cone portions 134, which is not limited in this embodiment. Each support assembly 14 located on the cylindrical portion 133 may or may not correspond to the position of the support assembly 14 on one circular table portion 134, and this embodiment is not limited thereto.
Fig. 4 is a schematic structural diagram of a supporting assembly 14 according to an embodiment of the present invention, please refer to fig. 4, in a possible design, each supporting assembly 14 includes: a connecting arm 141, a rolling ball seat 142 and a rolling ball 143; the first end of the connecting arm 141 is connected to the air duct 13, and the second end is connected to the rolling ball seat 142; the rolling ball seat 142 is provided with a rolling ball 143 therein, and the rolling ball 143 is used for rolling along the inner wall of the pipe.
The connecting arm 141 is rod-shaped, a hemispherical groove is formed in the end face, far away from the connecting arm 141, of the rolling ball seat 142, a rolling ball 143 is arranged in the hemispherical groove, the shape of the inner cavity of the hemispherical groove is matched with the shape of the rolling ball 143, so that the rolling ball 143 can roll in all directions in the hemispherical groove, and when the device runs in different directions relative to a pipeline, the rolling ball 143 can roll in the corresponding direction, and friction force between the device and the inner wall of the pipeline is reduced.
Further, the connecting arm 141 is rotatably connected with the outer wall of the air duct 13, and the connecting arm 141 can be fixed at a position of a desired rotation angle by a clamping piece, so that the height of the supporting component 14 can be adjusted according to the inner diameter of the pipe to be measured, and the contact between the rolling ball 143 and the inner wall of the pipe can be ensured during use. The connecting arm 141 and the air duct 13 may be connected by a hinge or other rotatable means, which is not limited in this embodiment.
Furthermore, the connecting column is arranged at the bottom of the hemispherical groove, and the connecting arm 141 is connected with the bottom of the rolling ball seat 142 through the connecting column, so that the connecting arm 141 and the rolling ball seat 142 are conveniently connected during manufacturing, and the stability of the device is improved.
Secondly, the structure and the working principle of the detection unit 3
The detection unit 3 is used for detecting defects on the pipe wall, for example, the defects may be depressions or protrusions. In one possible design, the frame body 1 is provided with a support ring 15; the detection unit 3 includes: a magnetizing unit 31 and a leakage magnetic flux detecting element 32; the magnetizing assembly 31 includes: a Y-shaped support bar 311, an electromagnet 312 and a magnetic conducting bar 313, see fig. 5; the first end of the support bar 311 is connected to the outer wall of the support ring 15; the electromagnet 312 is detachably connected to the second end of the supporting rod 311, and the magnetic conducting rod 313 is telescopically connected to the electromagnet 312; the leakage flux detecting member 32 is detachably attached to the third end portion of the support rod 311.
The support ring 15 and the frame body 1 may be fixedly connected, for example, welded, or detachably connected, for example, screwed, which is not limited in this embodiment. The detection unit 3 is mainly used for detecting the defects on the pipeline wall, and the working principle of detecting the pipeline defects is as follows: the pipeline wall is magnetized by adopting a magnet, the magnetic field at the position of the defect is distorted to form magnetic leakage, and the defect is found by adopting a detection element to detect whether the magnetic leakage field exists or not.
Specifically, the end of the magnetic conducting rod 313 is provided with an arc-shaped surface for contacting with the inner wall of a steel pipeline, in the using process of the device, the electromagnet 312 magnetizes the pipeline wall fully through the magnetic conducting rod 313, the magnetic force lines in the pipeline wall are blocked by defects at the defect position on the pipeline wall and are distorted, and a part of the magnetic force lines leak out of the inner surface and the outer surface of the pipeline to form a leakage magnetic field. The leakage magnetic detecting element 32 picks up the leakage magnetic signal and transmits the leakage magnetic signal to the controller 42, so that the controller 42 performs data storage and transmission.
In a possible design, a magnetic pole 314 is disposed on the electromagnet 312, a buffer groove 3141 is disposed on the magnetic pole 314, an elastic member 315 is disposed in the buffer groove 3141, and a free end of the elastic member 315 is connected to the magnetic pole 313.
The magnetic conducting column 314 can move in the buffer groove 3141, and when the device travels to an uneven position on the pipe wall in use, the elastic part 315 keeps the end of the magnetic conducting column 314 against the inner wall of the pipeline through proper extension and retraction. The elastic member 315 may be a spring, one end of which is connected to the bottom of the buffer groove 3141, and the other end of which is fixed to the magnetic conductive column 314.
Further, the leakage magnetic detecting element 32 is telescopically connected to the third end of the supporting rod 311, so that the height of the leakage magnetic detecting element 32 can be adjusted according to the inner diameter of the pipe to be detected before use, so as to improve the accuracy of detection, for example, the leakage magnetic detecting element 32 and the supporting rod 311 can be in threaded connection.
Thirdly, the structure and the working principle of the brake unit 5
Fig. 6 is a schematic structural diagram of a brake unit 5 according to an embodiment of the present invention, please refer to fig. 6, in a possible design, the pipeline detecting device further includes: a brake unit 5 electrically coupled to the control unit 4; the brake unit 5 includes a plurality of brake assemblies 51; each of the brake assemblies 51 includes: the telescopic rod 511 and the arc positioning plate 512; the telescopic rod 511 is telescopically connected to the outer wall of the air duct 13; the arc positioning plate 512 is connected to the end of the telescopic rod 511 for abutting against the inner wall of the pipeline.
When it is necessary to stop the device from moving in the pipeline, the telescopic rod 511 is extended under the control of the controller 42, and the arc positioning plate 512 of the brake unit 51 is pressed against the inner wall of the pipeline, so that the device can be fixed in the pipeline by stopping the movement. The telescopic rod 511 can be extended or retracted through pneumatic or hydraulic modes, which is not limited in this embodiment. For example, a hydraulic cylinder may be disposed on an outer wall of the fan, the hydraulic cylinder is electrically coupled to the controller 42 and the power source 41, respectively, and an output end of the hydraulic cylinder is connected to the extension rod 511.
Furthermore, the outer wall of the convex surface of the arc-shaped positioning plate 512 is also provided with a rubber non-slip pad, so that the pipe wall can be prevented from being worn by the arc-shaped positioning plate 512, the friction force between the pipe wall and the inner wall of the pipeline can be increased, and the braking of the device is facilitated.
Fourth, the structure and the working principle of the frame body 1
In one possible design, the rack 1 further comprises: a first link 16, a second link 17, and a third link 18; the first connecting rod 16 connects the bottom plate 11 and the air duct 13; the second connecting rod 17 connects the bottom plate 11 and the detecting unit 3; the third connecting rod 18 connects the air duct 13 and the detecting unit 3.
The structure of the frame body 1 ensures that the two ends of the air duct 13 are wide, avoids blockage, enables the media inside and outside the air duct 13 to freely circulate, facilitates the flow of the media, and provides larger propelling force for the device.
Fifthly, the structure and the working principle of the control unit 4
The control unit 4 includes: a power source 41 and a controller 42 electrically coupled to the power source 41. The power supply 41 supplies power for the power unit 2 and the detection unit 3 simultaneously, and the power supply 41 with different electric quantities can be set according to the use requirements, so that the running and detection process stable running of the device is ensured, the running mileage of the device is increased, and the device is suitable for detection of a longer pipeline.
The controller 42 in the control unit 4 may be connected to a remote console through a cable, or the control unit 4 may further include a wireless information transceiver module, and the remote controller sends an instruction to the controller 42 through the wireless information transceiver module, thereby implementing information transmission between the remote controller and the controller 42.
Furthermore, each unit is relatively independent, and is electrically coupled through a cable quick connector, so that the quick connection and disconnection between the two units are realized, the units in the device are independent, and the quick replacement of the units in the device is facilitated.
The following description will take the electrical coupling between the control unit 4 and the detection unit 3 as an example to illustrate the above connection method, and the specific structure thereof is as follows: the tip integration that will follow many cables that the control unit 4 draws is on a quick plug, and this quick plug has many independent terminals, and the tip integration of the cable that draws in the detecting element 3 is on same quick socket to make the terminal on the socket and the terminal one-to-one on the plug, like this, when carrying out the quick plug between socket and the plug, can connect or break off simultaneously between many cables, improved the work efficiency who installs or dismantle between each unit greatly.
Fig. 7 is an electrical schematic diagram of a pipeline detecting device according to an embodiment of the present invention, please refer to fig. 7, wherein a power source 41 of the control unit 4 is electrically coupled to a controller 42; the power source 41 is electrically coupled with the power unit 2, the detection unit 3 and the brake unit 5 respectively; the controller 42 is electrically coupled to the power unit 2, the detection unit 3, and the brake unit 5, respectively. Thereby realizing the supply of electric energy for each electric element and the control of the start or stop of each electric element.
All the above-mentioned optional technical solutions can be combined arbitrarily to form the optional embodiments of the present invention, and are not described herein again.
According to the device provided by the embodiment of the invention, the air duct 13 is arranged at one end of the frame body 1, the power unit 2 is arranged on the air duct 13, and the power supply 41 supplies power to the power unit 2 under the control of the controller 42, so that the propeller 23 in the power unit 2 can rotate in a medium to obtain the propelling force applied by the medium so as to push the whole pipeline detection device to move. Therefore, the device can travel in the pipeline only by the power provided by the power unit 2 without the aid of high-pressure media, and effective detection of defects on the pipeline wall is realized.
Further, the arrangement of the circular table part 134 of the air duct 13 increases the flow of the medium in the cylindrical part 133, which is beneficial to obtaining the propulsion; the structure of the frame body 1 ensures that the two ends of the air duct 13 are wide, so that the medium can flow conveniently, and a larger propelling force is provided for the device; the units in the device are relatively independent, and are electrically coupled through the cable quick connectors, so that the units in the device can be quickly replaced.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.
Claims (9)
1. A pipeline inspection device, comprising: the device comprises a frame body (1), a power unit (2), at least one detection unit (3) and a control unit (4);
a plurality of wheel sets (12) are connected to a bottom plate (11) of the frame body (1), an air duct (13) is arranged at one end of the frame body (1), a plurality of supporting assemblies (14) are arranged on the outer wall of the air duct (13), and each supporting assembly (14) is used for contacting with the inner wall of a pipeline;
the air duct (13) comprises a cylindrical part (133) and a hollow circular table part (134);
a first end of the circular table part (134) is connected with the cylindrical part (133), and a second end of the circular table part (134) has a diameter larger than that of the first end;
a plurality of supporting assemblies (14) are uniformly arranged on the outer walls of the cylindrical part (133) and the circular table part (134) along the circumferential direction;
the power unit (2) comprises a motor (21), a transmission mechanism (22) and a propeller (23), the motor (21) is arranged on the outer wall of the air duct (13), the propeller (23) is rotatably connected to the inner wall of the air duct (13), and the transmission mechanism (22) penetrates through an opening in the wall of the air duct (13);
the output shaft of the motor (21) is connected with the input end of the transmission mechanism (22), the propeller (23) comprises a hub (231) and a plurality of blades (232) which are radially connected to the hub (231) along the circumferential direction, the ends of the plurality of blades (232) are connected with the output end of the transmission mechanism (22), and the transmission mechanism (22) is used for driving the propeller (23) to rotate in a medium, so that the medium applies a propelling force to the propeller (23);
the at least one detection unit (3) is connected to the frame body (1) and is used for detecting the pipeline;
the control unit (4) is arranged on the bottom plate (11) of the frame body (1), the control unit (4) comprises a power source (41) and a controller (42) electrically coupled with the power source (41), the power source (41) is electrically coupled with the power unit (2) and each of the detection units (3), and the controller (42) is electrically coupled with the power unit (2) and each of the detection units (3).
2. The pipeline inspection device according to claim 1, wherein the transmission mechanism (22) includes a first gear (221) and a second gear (222) that are engaged with each other, an output shaft of the motor (21) is coupled to a shaft of the first gear (221), and ends of the plurality of blades (232) are connected to the second gear (222).
3. The pipeline inspection device of claim 2, wherein the power unit (2) further comprises: an annular fixed sleeve (24);
the ends of a plurality of blades (232) of the propeller (23) are connected with the inner wall of the fixed sleeve (24); the second gear (222) is sleeved on the fixed sleeve (24).
4. The pipeline detection device according to claim 3, characterized in that a first mounting ring (131) and a second mounting ring (132) are arranged in the air duct (13);
the fixing sleeve (24) is arranged between the first mounting ring (131) and the second mounting ring (132), and two side walls of the fixing sleeve (24) are provided with a first annular groove (241) and a second annular groove (242);
a third groove (1311) matched with the first groove (241) is formed in the surface, adjacent to the fixed sleeve (24), of the first mounting ring (131), and a ball is arranged between the first groove (241) and the third groove (1311);
and a fourth groove (1321) matched with the second groove (242) is arranged on the surface of the second mounting ring (132) adjacent to the fixed sleeve (24), and a ball is arranged between the second groove (242) and the fourth groove (1321).
5. The pipeline inspection device of claim 1, wherein each support assembly (14) includes: the connecting arm (141), the rolling ball seat (142) and the rolling ball (143);
the first end of the connecting arm (141) is connected to the air duct (13), and the second end of the connecting arm is connected to the roller seat (142);
the rolling ball seat (142) is internally provided with a rolling ball (143), and the rolling ball (143) is used for rolling along the inner wall of the pipeline.
6. The pipeline detection device according to claim 1, wherein a support ring (15) is arranged on the frame body (1);
the detection unit (3) comprises: a magnetizing unit (31) and a leakage magnetic flux detecting element (32);
the magnetizing assembly (31) comprises: a Y-shaped support rod (311), an electromagnet (312) and a magnetic conduction rod (313);
the first end of the supporting rod (311) is connected to the outer wall of the supporting ring (15);
the electromagnet (312) is detachably connected to the second end part of the supporting rod (311), and the magnetic conducting rod (313) is telescopically connected to the electromagnet (312);
the leakage magnetic detecting element (32) is detachably attached to the third end portion of the support rod (311).
7. The pipeline detection device according to claim 6, wherein a magnetic conductive column (314) is arranged on the electromagnet (312), a buffer groove (3141) is arranged on the magnetic conductive column (314), an elastic member (315) is arranged in the buffer groove (3141), and a free end of the elastic member (315) is connected with the magnetic conductive rod (313).
8. The pipeline inspection device of claim 1, further comprising: a braking unit (5) electrically coupled to the control unit (4);
the braking unit (5) comprises a plurality of braking assemblies (51);
each of the brake assemblies (51) includes: the telescopic rod (511) and the arc positioning plate (512);
the telescopic rod (511) is telescopically connected to the outer wall of the air duct (13);
the arc-shaped positioning plate (512) is connected with the end part of the telescopic rod (511) and is used for abutting against the inner wall of the pipeline.
9. The pipeline inspection device according to claim 1, wherein the rack (1) further comprises: a first link (16), a second link (17), and a third link (18);
the first connecting rod (16) is connected with the bottom plate (11) and the air duct (13);
the second connecting rod (17) is connected with the bottom plate (11) and the detection unit (3);
the third connecting rod (18) is connected with the air duct (13) and the detection unit (3).
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| CN110822214A (en) | 2020-02-21 |
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