阅读说明：本技术 一种地下管线定位装置及方法 (Underground pipeline positioning device and method ) 是由 芮龙胤 于 2021-02-04 设计创作，主要内容包括：本申请涉及一种地下管线的定位的技术领域,尤其是涉及一种地下管线定位装置及方法,其包括前引导组件和后引导组件,前引导组件和后引导组件之间设置有球铰接件,所述前引导组件上连接有用于测量前引导组件移动距离的拉绳,所述前引导组件和后引导组件之间设置有角度测量仪,所述角度测量仪用于测量前引导组件和后引导组件之间的夹角。本申请具有方便管线定位测量的效果。(The utility model relates to a technical field of the location of underground pipeline, especially, relate to an underground pipeline positioner and method, it includes preceding guide assembly and back guide assembly, is provided with the ball articulated elements between preceding guide assembly and the back guide assembly, be connected with the stay cord that is used for measuring preceding guide assembly displacement on the preceding guide assembly, be provided with angular surveying appearance between preceding guide assembly and the back guide assembly, angular surveying appearance is used for measuring the contained angle between preceding guide assembly and the back guide assembly. This application has the effect that makes things convenient for pipeline location measurement.)

1. An underground pipeline positioner which characterized in that: including preceding guide assembly (1) and back guide assembly (2), be provided with ball articulated elements (4) between preceding guide assembly (1) and the back guide assembly (2), be connected with stay cord (5) that are used for measuring preceding guide assembly (1) displacement on preceding guide assembly (1), be provided with angle measuring instrument (6) between preceding guide assembly (1) and back guide assembly (2), angle measuring instrument (6) are used for measuring the contained angle between preceding guide assembly (1) and the back guide assembly (2).

2. The underground utility locating device of claim 1, wherein: the device is characterized in that a deviation rectifying assembly (7) is arranged in the front guide assembly (1), the deviation rectifying assembly (7) is used for measuring the deviation angle of the front guide assembly (1) around the center of the front guide assembly (1) in the moving process, and the data measured by the angle measuring instrument (6) is corrected by the deviation rectifying assembly (7).

3. The underground utility locating device of claim 2, wherein: the front guide assembly (1) is internally provided with a correcting assembly (8), a processor is arranged between the correcting assembly (8) and the correcting assembly (7), and the correcting assembly (8) receives deflection data of the correcting assembly (7) through the processor to control the correcting assembly (8) to work.

4. The underground utility locating device of claim 3, wherein: the angle measuring instrument (6) comprises a first sliding block (63), a first sliding rod (62), a second sliding block (65), a second sliding rod (64) and a fixing rod (61), wherein the fixing rod (61) is fixed on the front guide assembly (1), the second sliding rod (64) is in sliding fit with the rear guide assembly (2), the second sliding block (65) is in sliding fit with the second sliding rod (64), the first sliding block (63) is in sliding fit with the first sliding rod (62), the first sliding rod (62) is fixed on the second sliding block (65), and the first sliding rod (62) and the second sliding rod (64) are perpendicular to each other.

5. The underground utility locating device of claim 4, wherein: the deviation rectifying assembly (7) comprises a gravity rod (71) and a measuring ring (72), the gravity rod (71) is rotatably connected to the front guide assembly (1), and the gravity rod (71) and the measuring ring (72) are matched with a slide weight rod (71) to deflect an angle.

6. An underground utility locating device according to any one of claims 3 to 5, wherein: the aligning component (8) comprises an aligning motor (81), a rotating shaft (82) and a roller (83), the aligning motor (81) is fixed on the front guide component (1), the rotating shaft (82) is connected with the aligning motor (81), the roller (83) is rotatably connected to the rotating shaft (82) at one end far away from the aligning motor (81), the roller (83) is used for abutting against the inner wall of the pipeline, and the aligning motor (81) is connected with the processor.

7. The underground utility locating device of claim 6, wherein: the centering motor is characterized in that a central shaft (84) is coaxially and fixedly arranged on an output shaft of the centering motor (81), a multi-prism hole (85) is formed in the center of the rotating shaft (82), the rotating shaft (82) is in sliding fit with the central shaft (84) through the multi-prism hole (85), a compression spring (86) is sleeved on the central shaft (84), one end of the compression spring (86) abuts against the rotating shaft (82), and the other end of the compression spring abuts against the central shaft (84).

8. The underground utility locating device of claim 1, wherein: preceding guide assembly (1) and back guide assembly (2) are gone up and all are provided with a plurality of supporting wheels (3), supporting wheel (3) are connected with bracing piece (31), bracing piece (31) sliding fit is in the front on guide assembly (1) or back guide assembly (2), the one end of bracing piece (31) is provided with pressure spring (32), rotate screw rod (34) of connection corresponding with every bracing piece (31) on preceding guide assembly (1) and back guide assembly (2), threaded connection has butt plate (33) on screw rod (34), the one end butt of bracing piece (31) is kept away from in pressure spring (32) is on butt plate (33).

9. The underground utility locating device of claim 1, wherein: preceding guide assembly (1) is gone up to rotate and is connected with pull ring (9), pull ring (9) and the axis of rotation of preceding guide assembly (1) coincide with the central line of preceding guide assembly (1), be provided with on pull ring (9) and hang knot (91), stay cord (5) are fixed on hanging knot (91).

10. An underground pipeline positioning method is characterized in that: an underground utility locating device according to claim 1, for locating a pipe.

Technical Field

The application relates to the technical field of positioning of underground pipelines, in particular to an underground pipeline positioning device and method.

Background

The urban underground pipeline is mainly used for drainage, electric power and fuel gas, when the underground pipeline is constructed around, the position of the underground pipeline needs to be measured, and when the position data of the underground pipeline is lost or is difficult to obtain, workers need to measure on site, and in the underground pipeline positioning, a geophysical prospecting method, an inertial positioning method or a satellite positioning method is mainly used.

The patent document with the publication number of CN103064123B discloses an underground pipeline positioning device, which comprises an electronic identifier and a detector, wherein the electronic identifier is an electronic identifier with a low-load-like LC resonant circuit structure; the detecting instrument is handheld, can send low-frequency electromagnetic wave signals to oscillate the LC resonance circuit, and determines the position and the embedding depth of the electronic marker according to the strength of the received reflected signals; a GPS module is arranged on the detecting instrument to acquire longitude and latitude coordinates of the detecting instrument in real time; the detecting instrument also accesses the background computer management system through a movable reading device or is directly connected with the background computer management system through a hard wire interface.

However, the pipeline position measured in the above structure requires a worker to repeatedly determine the intensity of the reflected signal to complete the pipeline measurement, which makes the pipeline positioning troublesome.

Disclosure of Invention

In order to facilitate pipeline positioning, the application provides an underground pipeline positioning device and an underground pipeline positioning method.

The application provides an underground pipeline positioner adopts following technical scheme:

the utility model provides an underground pipeline positioner, is provided with the ball articulated elements including preceding guide assembly and back guide assembly between preceding guide assembly and the back guide assembly, be connected with the stay cord that is used for measuring preceding guide assembly displacement on the preceding guide assembly, be provided with angle measuring instrument between preceding guide assembly and the back guide assembly, angle measuring instrument is used for measuring the contained angle between preceding guide assembly and the back guide assembly.

Through adopting above-mentioned technical scheme, during the use, wear to establish the pipeline that awaits measuring earlier with the stay cord in, the tip and the preceding guide subassembly of stay cord are connected, guide subassembly and back guide subassembly remove along the pipeline before the drag through the stay cord makes, and set up the ball articulated elements between preceding guide subassembly and the back guide subassembly, thereby when the turn takes place in the pipeline, the angle that can survey with the pipeline turn through the angle measuring apparatu that sets up between preceding guide subassembly and the back guide subassembly, the direction of pipeline is measured to the distance that cooperates the stay cord to remove simultaneously, thereby it is more convenient to the location of pipeline.

Preferably, a deviation rectifying assembly is arranged in the front guide assembly and used for measuring the deviation angle of the front guide assembly around the center of the front guide assembly in the moving process, and data measured by the angle measuring instrument is corrected by the deviation rectifying assembly.

By adopting the technical scheme, when the pipeline of the front guide assembly rotates and inclines around the center of the front guide assembly in the moving process of the front guide assembly, the deflection angle is measured by the deviation correcting assembly, so that the data measured by the deviation correcting assembly on the data measured by the angle measuring instrument is corrected, and the accuracy of measuring the direction of the pipeline is improved.

Preferably, a correcting assembly is arranged in the front guide assembly, a processor is arranged between the correcting assembly and the deviation correcting assembly, and the correcting assembly receives the deviation data of the deviation correcting assembly through the processor to control the correcting assembly to work.

By adopting the technical scheme, the deflection angle is measured by the deviation correcting component, and then the centering component is driven by the processor according to the deflection direction, so that the centering component moves the front guide component to the reverse deflection direction, the deflection of the front guide component is reduced, and the measurement accuracy of the pipeline is improved.

Preferably, the angle measuring instrument includes a first slider, a first slide bar, a second slider, a second slide bar and a fixing bar, the fixing bar is fixed on the front guide assembly, the second slide bar is in sliding fit on the rear guide assembly, the second slider is in sliding fit on the second slide bar, the first slider is in sliding fit on the first slide bar, the first slide bar is fixed on the second slider, and the first slide bar and the second slide bar are perpendicular to each other.

Through adopting above-mentioned technical scheme, the dead lever is along with preceding guide assembly takes place to deflect the back, and the dead lever drives first slider and moves on first slide bar and second slider and move on the second slide bar to make the deflection angle of dead lever survey through the position of first slider on first slide bar and the position of second slider on the second slide bar, conveniently to the direction survey of preceding guide assembly and back guide assembly.

Preferably, the deviation rectifying assembly comprises a gravity rod and a measuring ring, the gravity rod is rotatably connected to the front guide assembly, and the gravity rod and the measuring ring are matched to slide to measure the deflection angle of the gravity rod.

By adopting the technical scheme, the gravity rod is rotationally connected to the front guide assembly, and when the front guide assembly of the gravity rod deflects, the gravity rod moves relative to the measuring ring, so that the deflection angle of the front guide assembly is measured by measuring the movement angle of the gravity rod relative to the measuring ring.

Preferably, the aligning component comprises an aligning motor, a rotating shaft and a roller, the aligning motor is fixed on the front guide component, the rotating shaft is connected with the aligning motor, the roller is rotatably connected to one end of the rotating shaft, which is far away from the aligning motor, the roller is used for abutting against the inner wall of the pipeline, and the aligning motor is connected with the processor.

Through adopting above-mentioned technical scheme, return positive motor and rotate, return positive motor and make the pivot remove, the gyro wheel butt is on the inner wall of pipeline to the gyro wheel rotates under the effect of returning positive motor and inclines with the moving direction of preceding guide assembly, makes the guide assembly get back to initial condition before the gyro wheel drives.

Preferably, a central shaft is coaxially and fixedly arranged on an output shaft of the centering motor, a multi-prism hole is formed in the center of the rotating shaft, the rotating shaft is in sliding fit with the central shaft through the multi-prism hole, a compression spring is sleeved on the central shaft, one end of the compression spring abuts against the rotating shaft, and the other end of the compression spring abuts against the central shaft.

Through adopting above-mentioned technical scheme, set up many prism holes in the pivot, center pin sliding fit is in the pivot, can guarantee through compression spring that the gyro wheel is in the state with good butt of pipeline inner wall.

Preferably, all be provided with a plurality of supporting wheels on preceding guide assembly and the back guide assembly, the supporting wheel is connected with the bracing piece, bracing piece sliding fit is in the front on guide assembly or the back guide assembly, the one end of bracing piece is provided with the pressure spring, rotate the screw rod of connecting corresponding with every bracing piece on preceding guide assembly and the back guide assembly, threaded connection has the butt plate on the screw rod, the one end butt in the bracing piece is kept away from to the pressure spring is on the butt plate.

Through adopting above-mentioned technical scheme, when the screw rod rotated, the butt plate on the screw rod removed along the length direction of screw rod to can make the butt plate adjust the butt power of pressure spring, guide subassembly and back guide subassembly are in the central point of pipeline before making and put, improve the survey degree of accuracy to the pipeline trend.

Preferably, the front guide assembly is rotatably connected with a pull ring, the rotation axis of the pull ring and the rotation axis of the front guide assembly coincide with the central line of the front guide assembly, the pull ring is provided with a hanging buckle, and the pull rope is fixed on the hanging buckle.

Through adopting above-mentioned technical scheme, the pull ring rotates to be connected in the front on the guide assembly, sets up the pull ring between stay cord and preceding guide assembly, can make relative rotation between stay cord and the preceding guide assembly, reduces the angle influence of stay cord to preceding guide assembly.

The application provides an underground pipeline positioning method, which adopts the following technical scheme:

the underground pipeline positioning device is used for measuring the position of a pipeline.

By adopting the technical scheme, the moving distance of the front guide assembly is measured through the pull rope, and the deflection angle between the front guide assembly and the rear guide assembly is measured through the angle measuring instrument, so that the position and the turning angle of the pipeline are measured, and the position of the pipeline is conveniently measured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the end part of the pull rope is connected with the front guide assembly, a ball hinge is arranged between the front guide assembly and the rear guide assembly, the angle measuring instrument can measure the turning angle of the pipeline, and the moving distance of the pull rope measures the direction of the pipeline, so that the pipeline is conveniently positioned;

2. through the inside of the front guide assembly of the deviation rectifying assembly, when the pipeline of the front guide assembly rotates and inclines around the center of the front guide assembly in the moving process, the deviation rectifying assembly measures the deflection angle, so that the data measured by the deviation rectifying assembly on the data measured by the angle measuring instrument is rectified, and the accuracy of measuring the pipeline direction is improved;

3. the deflection angle is measured by the deviation rectifying assembly, and then the centering assembly is driven by the processor according to the deflection direction, so that the centering assembly moves the front guide assembly to the reverse deflection direction, the deflection of the front guide assembly is reduced, and the measurement accuracy of the pipeline is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

fig. 2 is a schematic full-section structure diagram of an embodiment of the present application.

Description of reference numerals: 1. a front guide assembly; 11. a front housing; 2. a rear guide assembly; 21. a rear housing; 3. a support wheel; 31. a support bar; 32. a pressure spring; 33. a butt joint plate; 34. a screw; 35. a support plate; 4. a ball hinge; 41. a hemispherical shell; 42. a sphere; 5. pulling a rope; 6. an angle measuring instrument; 61. fixing the rod; 62. a first slide bar; 63. a first slider; 64. a second slide bar; 65. a second slider; 66. a fixed seat; 67. mounting a plate; 68. a guide bar; 69. a guide hole; 7. a deviation rectifying component; 71. a gravity bar; 72. a measuring ring; 73. a fixing plate; 8. a correcting component; 81. returning to the positive motor; 82. a rotating shaft; 83. a roller; 84. a central shaft; 85. a multi-prismatic hole; 86. a compression spring; 9. a pull ring; 91. and (7) hanging and buckling.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses pipeline positioner underground. Referring to fig. 1 and 2, the guide assembly comprises a front guide assembly 1 and a rear guide assembly 2, a plurality of support wheels 3 are arranged on the front guide assembly 1 and the rear guide assembly 2 in the circumferential direction, the number of the support wheels 3 on the front guide assembly 1 and the rear guide assembly 2 is three in the embodiment, and the plurality of support wheels 3 are uniformly distributed on the front guide assembly 1 and the rear guide assembly 2. A ball hinge 4 is arranged between the front guide assembly 1 and the rear guide assembly 2, the front guide assembly 1 is connected with the rear guide assembly 2 through the ball hinge 4, and a pull rope 5 is connected to the front guide assembly 1. During the use, connect in the front on guide assembly 1 from the other end of pipeline after drawing 5 penetrates from the one end of pipeline earlier, pull through pulling equipment, pulling equipment can select the grinder, under pulling equipment's effect, make preceding guide assembly 1 and back guide assembly 2 remove in the pipeline, be located and be provided with angle measurement appearance 6 between preceding guide assembly 1 and the back guide assembly 2, angle measurement appearance 6 is used for measuring the angle between preceding guide assembly 1 and the back guide assembly 2, the distance that preceding guide assembly 1 removed can be confirmed to the length of stay cord 5, angle measurement appearance 6 measures the direction that preceding guide assembly 1 removed, thereby survey out the route of pipeline by distance and direction.

Referring to fig. 1 and 2, the front guide assembly 1 includes a front housing 11, the rear guide assembly 2 includes a rear housing 21, the front housing 11 and the rear housing 21 are both cylindrical, and one end of the front housing 11 faces the rear housing 21, one end of the rear housing 21 faces the front housing 11, the ball hinge 4 includes a hemispherical shell 41 and a ball 42, the ball 42 is ball-hinge-fitted in the hemispherical shell 41, the ball 42 is fixed at one end of the front housing 11 close to the rear housing 21, and a center line of the front housing 11 passes through a center of the ball 42, the hemispherical shell 41 is fixed at one end of the rear housing 21 close to the front ball 42, and a center line of the rear housing 21 passes through a center of the hemispherical shell 41. The front guide assembly 1 is supported by a plurality of supporting wheels 3, the front guide assembly 1 is positioned on an extension line of a pipeline at the supporting wheels 3 on the front guide assembly 1, the rear guide assembly 2 is supported by a plurality of supporting wheels 3, the rear guide assembly 2 is positioned on an extension line of the pipeline outside the supporting wheels 3 on the rear guide assembly 2, when the position and the direction of the pipeline between the front guide assembly 1 and the rear guide assembly 2 are changed, the sphere 42 rotates in the hemispherical shell 41, and the sphere 42 can rotate in any direction in the hemispherical shell 41, so that the front guide assembly 1 and the rear guide assembly 2 can measure the three-dimensional path of the pipeline.

Referring to fig. 2, the angle measuring apparatus 6 includes a fixing rod 61, a first sliding rod 62 and a second sliding rod 64, the first sliding rod 62 and the second sliding rod 64 are perpendicular to each other, a first sliding block 63 is disposed on the first sliding rod 62, the first sliding block 63 is slidably fitted on the first sliding rod 62, a distance measuring instrument can be fixedly disposed at one end of the first sliding rod 62, the position of the first sliding block 63 on the first sliding rod 62 is measured by the distance measuring instrument, or a resistance wire is disposed on the first sliding rod 62, and the position of the first sliding block 63 on the first sliding rod 62 is measured by the measured resistance of the first sliding block 63 and one end of the first sliding rod 62. The second slide bar 64 is provided with a second slide block 65, the second slide block 65 is in sliding fit with the second slide bar 64, a distance meter is fixedly arranged at one end of the second slide bar 64, the position of the second slide block 65 on the second slide bar 64 is measured by the distance meter, or a resistance wire is arranged on the second slide bar 64, and the position of the second slide block 65 on the second slide bar 64 is measured by the measured resistance of the second slide block 65 and one end of the second slide bar 64. The fixing rod 61 is fixed on the ball 42, and the center line of the fixing rod 61 coincides with the center line of the front case 11, to improve the curvature of the pipe that can be measured, and one end of the fixing rod 61, which is far from the ball 42, is hinged on the first slider 63, and the first slide 62 is fixed on the second slider 65. When the front housing 11 and the rear housing 21 rotate relative to each other, the fixing rod 61 drives the first slider 63 to move on the first slide bar 62 and the second slider 65 to move on the second slide bar 64, so that the inclination angle of the fixing rod 61 in two directions can be resolved.

Referring to fig. 2, in order to facilitate the fixing rod 61 to drive the first slider 63 and the second slider 65 to move, a mounting plate 67 is disposed in the rear housing 21, the second sliding rod 64 is fixed on the mounting plate 67, two guide rods 68 are fixedly disposed on the mounting plate 67, a length direction of each guide rod 68 is parallel to a center line of the rear housing 21, a fixing seat 66 is disposed in the rear housing 21, a guide hole 69 matched with each guide rod 68 is formed in each fixing seat 66, and each guide rod 68 is slidably matched in the guide hole 69 along the length direction of each guide rod 68, so that when the fixing rod 61 moves, the mounting plate 67 moves along the length direction of each guide rod 68, so that the first slider 63 moves on the first sliding rod 62 and the second slider 65 moves on the second sliding rod 64. In use, since the fixing rod 61 can be hinged with the first slider 63, the angle change between the front guide assembly 1 and the rear guide assembly 2 can be more accurately measured by the positions of the first slider 63 and the second slider 65.

Referring to fig. 2, a deviation rectifying assembly 7 is disposed in the front housing 11, the deviation rectifying assembly 7 includes a gravity rod 71 and a measuring ring 72, a fixing plate 73 is fixedly disposed in the front housing 11, one end of the gravity rod 71 is rotatably connected to the fixing plate 73, a rotation axis of the gravity rod 71 on the fixing plate 73 is parallel to a center line of the front housing 11, the measuring ring 72 is fixed on the front housing 11, and when the gravity rod 71 swings, a deviation angle of the gravity rod 71 is identified by a resistance change between one end of the measuring ring 72 and the gravity rod 71. When the gravity rod 71 is inclined, the data generated by the fixing rod 61 needs to be corrected so that the data measured by the fixing rod 61 through the first slider 63 and the second slider 65 more accurately reflects the rotation direction of the front case 11 relative to the rear case 21. The correcting component 7 can also be a gyroscope and is fixed on the fixing plate 73 through the correcting component 7, and when the front shell 11 axially rotates, the correcting component 7 can also obtain the gravity direction, so that the data measured by the fixing rod 61 can be corrected.

Referring to fig. 2, a centering assembly 8 is disposed in the front housing 11, a processor is disposed between the centering assembly 8 and the deviation rectifying assembly 7, deflection information obtained by the deviation rectifying assembly 7 is transmitted to the processor, the centering assembly 8 includes a centering motor 81, a rotating shaft 82 and a roller 83, the centering motor 81 is a stepping motor or a servo motor, the centering motor 81 is connected to the processor, a rotation direction of the centering motor 81 is controlled by the processor, a central shaft 84 is coaxially and fixedly disposed on an output shaft of the centering motor 81, the direction of the central shaft 84 is parallel to the gravity rod 71 and is at an initial position, the initial position of the gravity rod 71 is a state that the front housing 11 measured by the gravity rod 71 is deflected to be zero, a multi-prism hole 85 is disposed at the center of the rotating shaft 82, the central shaft 84 is inserted into the multi-prism hole 85, the rotating shaft 82 is in sliding fit with the multi-prism hole 85, a compression spring 86 is sleeved on the, one end of a compression spring 86 abuts against one end of the rotating shaft 82, the other end abuts against the central shaft 84, the acting force of the compression spring 86 is used for driving the rotating shaft 82 to move in the direction away from the central shaft 84, one end of the rotating shaft 82 away from the central shaft 84 is rotatably connected with a roller 83, the roller 83 is used for abutting against the inner wall of the pipeline, after the deviation rectifying component 7 detects that the front shell 11 deflects, the central shaft 84 is driven by the positive motor 81 to rotate, the central shaft 84 synchronously rotates the rotating shaft 82, so that the direction of the roller 83 deflects, the front shell 11 is rotated in the direction of returning to the deviation state of zero in the process that the roller 83 rolls on the inner wall of the pipeline, the deviation generated by the rotation of the front shell 11 and the rear shell 21 is reduced, the measurement accuracy of the pipeline is improved, and meanwhile, the data of the deviation rectifying component 7 can be corrected firstly when the roller, the measuring accuracy of the pipeline is improved.

Referring to fig. 2, each support wheel 3 is provided with a support rod 31, and a plurality of support rods 31 are distributed in a downward scattering manner in a radial direction from the center of the front housing 11 or the rear housing 21. One end of the supporting rod 31 is located in the front shell 11 or the rear shell 21, the supporting rod 31 is connected with a pressure spring 32, the supporting rod 31 is in sliding fit with the front shell 11 or the rear shell 21, one end of the supporting rod 31, which is located outside the front shell 11 or the rear shell 21, is rotatably provided with the supporting wheel 3, the other end of the supporting rod 31 is abutted against one end of the pressure spring 32, one end, which is located far away from the supporting rod 31, of the pressure spring 32 is provided with a screw 34, a supporting plate 35 is fixedly arranged on the front shell 11 or the rear shell 21, the screw 34 is rotatably connected on the supporting plate 35, an abutting plate 33 is in threaded connection with the screw 34, one end, which is located far away from the supporting rod 31, of the pressure, so that the abutting plates 33 press the compression springs 32 to adjust the force of the support wheels 3 acting on the inner wall of the pipeline while the center line of the front housing 11 or the rear housing 21 is positioned at the center of the pipeline.

Referring to fig. 1 and 2, a pull ring 9 is disposed on the front housing 11, the pull ring 9 is rotatably connected to the front housing 11, and the rotation axis of the pull ring 9 and the rotation axis of the front housing 11 coincide with the center line of the front housing 11, a hook 91 is hung on the pull ring 9, the hook 91 can be selected as a climbing hook, and the pull rope 5 is fixed on the hook 91, so that the pull rope 5 can be detachably connected to the front housing 11, and meanwhile, when the front housing 11 rotates or the pull rope 5 twists, the front housing 11 and the pull rope 5 can freely rotate relatively.

The embodiment of the application still discloses an underground pipeline positioning method, including the position of the underground pipeline positioner who this embodiment discloses to the pipeline survey, through wear to establish stay cord 5 in the pipeline that awaits measuring, then connect in preceding guide assembly 1, preceding guide assembly 1 and back guide assembly 2 measure the direction of laying of pipeline along with the in-process that stay cord 5 removed, the subassembly 7 of rectifying that sets up in the guide assembly 1 revises measured data before the cooperation simultaneously, still including the returning positive subassembly 8 that is located preceding guide assembly 1, it is connected with the subassembly 7 of rectifying to return positive subassembly 8, it rotates to return positive subassembly 8 by the subassembly 7 of rectifying, make preceding guide assembly 1 and back guide assembly 2 return to the state that the deflection is zero.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.