An electromagnetic wave transmitting device for underground pipeline

Abstract

The invention relates to the technical field of wireless ranging, and specifically discloses an electromagnetic wave transmitting device for an underground pipeline, comprising an electromagnetic wave signal receiving processor and an electromagnetic wave transmitter, wherein the electromagnetic wave signal receiving processor is connected to the electromagnetic wave transmitter by signal, and a straight holding traction mechanism, a measuring point calibration clamp ring, a transmitting end centering measurement component, a straight transmission connection component, and an inflection point crossing measurement component are installed on one side of the electromagnetic wave transmitter; a light spot receiving panel verifies whether a current transmitting point positioning ring crosses a pipeline inflection point and extends to the other end of the pipeline according to a ray receiving surface, and at the same time, two groups of symmetrically distributed measuring midpoint displacement measuring mechanisms sense the sliding displacement with the inner wall of the pipeline gallery during transmission, and secondarily verifies whether the transmitting point positioning ring remains parallel to the pipeline distribution surface after crossing the pipeline inflection point, so that when the pipeline measuring point calibration clamp ring is completely in contact with the outer wall of the pipeline, the electromagnetic wave transmitter is quickly calibrated to the middle point position of the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of wireless distance measurement, in particular to an electromagnetic wave transmitting device for an underground pipeline. Background Art

[0002] In order to avoid the obstruction of multi-story buildings and underground pipe networks during pipeline measurement, which causes the propagation of electromagnetic waves to decrease after emission and causes signal attenuation, the traditional measurement method usually directly places the electromagnetic wave transmitter in the pipe gallery, and emits electromagnetic waves by directly placing the transmitter at the end of the pipeline to be measured, and senses and locates the pipeline damage based on the magnetic field reaction generated by the electromagnetic waves. However, this emission method has the following problems:

[0003] 1. Due to the limitation of the corridor space, when the pipe at the corridor port is selected as the base point for electromagnetic wave emission, if the pipe to be measured is an L-shaped pipe and the emission position is the other end of the pipe bend, the electromagnetic wave emission is not straight through, and it is easy to be affected by the bend surface and cause multiple reflections and refractions, which eventually leads to multipath propagation of the signal and measurement errors.

[0004] 2. Even if the existing pipeline crawler is used to transmit the electromagnetic wave generator to the turning point of the pipeline, there is a lack of means to determine whether the launch position is at the middle point of the pipeline after crossing the turning point. It is impossible to accurately confirm whether the current position of the electromagnetic wave during launch is maintained at the middle point of the pipeline, resulting in the accuracy of the launch position being less than ideal and prone to errors. Summary of the invention

[0005] In view of the problems in the prior art, the present invention provides an electromagnetic wave transmitting device for an underground pipeline. The technical solution adopted by the present invention to solve its technical problems is: an electromagnetic wave transmitting device for an underground pipeline, comprising an electromagnetic wave signal receiving processor and an electromagnetic wave transmitter, wherein the electromagnetic wave signal receiving processor is signal-connected to the electromagnetic wave transmitter, and a straight-line holding traction mechanism, a measuring point calibration clamp ring, a transmitting end centering measurement component, a straight-line transmission connection component, and an inflection point crossing measurement component are installed on one side of the electromagnetic wave transmitter, wherein the straight-line holding traction mechanism is used to drive the electromagnetic wave transmitter to transmit along the outer diameter of the pipeline to an artificially selected electromagnetic wave transmitting base point, the measuring point calibration clamp ring is installed at one end of the transmitting end centering measurement component, the straight-line transmission connection component is installed on the inner side of the straight-line holding traction mechanism, and the inflection point crossing measurement component is arranged between the transmitting end centering measurement component and the straight-line holding traction mechanism;

[0006] The straight-direction holding traction mechanism comprises a tail end guide ring, an inflection point stagnation ring, a launch point positioning ring and an electrically controlled driving wheel, wherein the tail end guide ring, the inflection point stagnation ring and the launch point positioning ring are all provided with electrically controlled driving wheels on their inner sides, and the tail end guide ring, the inflection point stagnation ring and the launch point positioning ring are all connected through the straight-direction transmission connection assembly, and the straight-direction transmission connection assembly is used to keep the tail end guide ring, the inflection point stagnation ring and the launch point positioning ring centered along the path when they move along the pipeline, and the inflection point crossing measurement assembly comprises a light spot opposite-shooting generator and a light spot receiving panel, wherein the light spot opposite-shooting generator is fixedly connected to the outer wall of the tail end guide ring, and the light spot receiving panel is provided on the outer side of the launch end centering measurement assembly;

[0007] The straight transmission connection assembly includes a plurality of connection seats, an intermediate fixed page, an embedded steering column, an anti-twisting connection column and an intermediate reset torsion spring. An intermediate fixed page and an anti-twisting connection column are arranged between two adjacent connection seats. Both ends of the intermediate fixed page are fixedly connected to the embedded steering column. The embedded steering column is rotatably connected to the inner side of the connection seat. The anti-twisting connection column is fixedly connected to the intermediate reset torsion spring. Both ends of the intermediate reset torsion spring are respectively fixedly connected to the two adjacent connection seats.

[0008] Preferably, the transmitting end centering measurement component includes an inflection point motion measuring bracket, an embedded slider, a measuring midpoint displacement measuring mechanism and a longitudinal height adjustment mechanism, the inflection point motion measuring bracket is fixedly connected to the tail end guide ring, the longitudinal height adjustment mechanism is fixedly connected to the embedded slider, the electromagnetic wave transmitter is fixedly connected to the output end of the longitudinal height adjustment mechanism, the embedded slider is slidably connected to the inner side of the inflection point motion measuring bracket, the number of the measuring midpoint displacement measuring mechanisms is two, the two measuring midpoint displacement measuring mechanisms are symmetrically distributed and are both slidably connected to the inflection point motion measuring bracket.

[0009] Preferably, the light spot receiving panel is fixedly connected to the outer wall of the inflection point motion measuring bracket, and the emitting surface of the light spot matching generator and the receiving surface of the light spot receiving panel are in the same horizontal plane.

[0010] Preferably, the electromagnetic wave signal receiving processor includes a terminal signal processor, a point measurement signal processor and a receiving antenna. The point measurement signal processor and the receiving antenna are both integrated and installed in the terminal signal processor. The point measurement signal processor and the measurement midpoint displacement measurement mechanism are both connected to the light spot receiving panel signal.

[0011] Preferably, a plurality of contact-conducting balls distributed in a semi-arc shape are rotatably connected to the bottom side of the measuring point calibration clamp ring, and the measuring point calibration clamp ring is fixedly connected to the electromagnetic wave transmitter.

[0012] Preferably, the midpoint displacement measuring mechanism consists of a sliding rod, a guide wheel and a displacement sensor, the guide wheel is rotatably connected to the sliding rod, the sliding rod is slidably connected to the inner side of the inflection point motion measuring bracket, and the displacement sensor is arranged on the inner side of the inflection point motion measuring bracket to measure whether the sliding rod is displaced when the electromagnetic wave transmitter reaches the electromagnetic wave transmission base point.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a straight transmission connection component to maintain the connectivity when the straight holding traction mechanism moves to the inflection point of the pipeline, the electromagnetic wave transmitter set at one end of the launch point positioning ring stably crosses the inflection point of the pipeline to reach the launch base point, avoiding multiple reflections and refractions of the electromagnetic wave, and at the same time of transmission, the light spot radiation generator sends an approval ray to the light spot receiving panel, and the light spot receiving panel verifies whether the current launch point positioning ring crosses the inflection point of the pipeline and extends to the other end of the pipeline according to the ray receiving surface. At the same time, two sets of symmetrically distributed measurement midpoint displacement measurement mechanisms sense the sliding displacement with the inner wall of the pipeline gallery during the transmission process, and secondarily verify whether the launch point positioning ring remains parallel to the pipeline distribution surface after crossing the inflection point of the pipeline. After maintaining parallelism, the longitudinal height control mechanism drives the measuring point calibration clamp to extend downward, so that the measuring point calibration clamp contacts the outer wall of the pipeline. At this time, due to the extrusion of the measuring point calibration clamp, the embedded slider slides adaptively on the inner side of the inflection point motion measurement bracket, so that when the pipeline measuring point calibration clamp is completely fitted with the outer wall of the pipeline, the electromagnetic wave transmitter is quickly calibrated to the middle point position of the pipeline, so that the accuracy of the launch position is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 The present invention is a schematic structural diagram of an underground pipeline electromagnetic wave transmitting device.

[0016] Figure 2 The present invention is a schematic structural diagram of a straight-direction holding traction mechanism, a measuring point calibration clamp ring and a transmitting end centering measurement component in an underground pipeline electromagnetic wave transmitting device.

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] In the figure: 1. Electromagnetic wave signal receiving processor; 11. Terminal signal processor; 12. Point measurement signal processor; 13. Receiving antenna; 2. Straight-keeping traction mechanism; 21. Tail end guide ring; 22. Inflection point stagnation ring; 23. Transmitting point positioning ring; 24. Electronically controlled drive wheel; 3. Measuring point calibration clamp; 31. Interface conduction ball; 4. Transmitting end centering measurement component; 41. Inflection point motion measurement bracket; 42. Embedded slider; 43. Measurement midpoint displacement measurement mechanism; 44. Longitudinal height adjustment mechanism; 5. Straight transmission connection component; 51. Connecting seat; 52. Middle fixed page; 53. Embedded steering column; 54. Anti-twisting connecting column; 55. Middle reset torsion spring; 6. Electromagnetic wave transmitter; 7. Inflection point crossing measurement component; 71. Light spot beam generator; 72. Light spot receiving panel. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] like Figure 1 - Figure 3 As shown, an underground pipeline electromagnetic wave transmitting device described in the present invention includes an electromagnetic wave signal receiving processor 1 and an electromagnetic wave transmitter 6. The electromagnetic wave signal receiving processor 1 is signal-connected to the electromagnetic wave transmitter 6. A straight-line holding traction mechanism 2, a measuring point calibration clamp ring 3, a transmitting end centering measurement component 4, a straight-line transmission connection component 5 and an inflection point crossing measurement component 7 are installed on one side of the electromagnetic wave transmitter 6. The straight-line holding traction mechanism 2 is used to drive the electromagnetic wave transmitter 6 to transmit along the outer diameter of the pipeline to an artificially selected electromagnetic wave transmitting base point. The measuring point calibration clamp ring 3 is installed at one end of the transmitting end centering measurement component 4, the straight-line transmission connection component 5 is installed on the inner side of the straight-line holding traction mechanism 2, and the inflection point crossing measurement component 7 is arranged between the transmitting end centering measurement component 4 and the straight-line holding traction mechanism 2.

[0021] In this embodiment, the present invention aims to improve the problem that when the pipeline at the port of the pipeline corridor is selected as the electromagnetic wave emission base point due to the limitation of the pipeline corridor space, if the pipeline to be measured is an L-shaped pipe, multiple reflections and refractions are prone to occur. At the same time, on the basis of solving this problem, after the electromagnetic wave transmitter crosses the inflection point of the pipeline and reaches the emission base point, the current position of 6 when performing electromagnetic wave emission can be quickly verified and adjusted to maintain it at the middle point of the pipeline.

[0022] In an optional implementation of this embodiment, the electromagnetic wave signal receiving processor 1 includes a terminal signal processor 11, a point measurement signal processor 12 and a receiving antenna 13. The point measurement signal processor 12 and the receiving antenna 13 are both integrated and installed in the terminal signal processor 11. The point measurement signal processor 12 and the measurement midpoint displacement measurement mechanism 43 are both signal-connected to the light spot receiving panel 72.

[0023] In this embodiment, the terminal signal processor 11, the receiving antenna 13 and the electromagnetic wave transmitter 6 are all existing electromagnetic wave measuring instruments. The improvement principle of the present invention is not how to analyze the electromagnetic wave signal, but how to control the electromagnetic wave to stably cross the inflection point of the pipeline to reach the next stage, and after arriving, verify and debug the emission point of the electromagnetic wave transmitter 6 at the middle point of the pipeline. Therefore, in this embodiment, the terminal signal processor 11, the receiving antenna 13 and the electromagnetic wave transmitter 6 are all well-known technical means in the field for the emission and reception analysis of electromagnetic waves, and this part will not be repeated here.

[0024] In an optional implementation of the present embodiment, the electric-controlled driving wheel 24 is used as a driving member to transmit the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 along the outer side of the pipeline to the selected measurement base point. During the transmission process, the straight transmission connection component 5 maintains the connectivity of the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 when they move to the turning point of the pipeline, so that the electromagnetic wave transmitter 6 set at one end of the launch point positioning ring 23 can stably cross the turning point of the pipeline to reach the launch base point, avoiding multiple reflections and refractions of the electromagnetic wave, and at the same time of transmission, the light spot radiation generator 71 sends an approval ray to the light spot receiving panel 72, and the light spot receiving panel 72 approves the current launch point positioning according to the ray receiving surface. Whether the positioning ring 23 extends across the pipeline inflection point to the other end of the pipeline, and at the same time, two sets of symmetrically distributed measuring midpoint displacement measuring mechanisms 43 sense the sliding displacement with the inner wall of the pipeline gallery during the transmission process, and secondarily verify whether the transmitting point positioning ring 23 remains parallel to the pipeline distribution surface after crossing the pipeline inflection point. After remaining parallel, the longitudinal height control mechanism 44 drives the measuring point calibration clamp 3 to extend downward, so that the measuring point calibration clamp 3 contacts the outer wall of the pipeline. At this time, due to the compression of the measuring point calibration clamp 3, the embedded slider 42 slides adaptively on the inner side of the inflection point motion measuring bracket 41, and then when the pipeline measuring point calibration clamp 3 is completely in contact with the outer wall of the pipeline, the electromagnetic wave transmitter 6 is quickly calibrated to the middle point of the pipeline, so that the accuracy of the emission position is improved.

[0025] In an optional implementation of the present embodiment, the straight-line maintaining traction mechanism 2 includes a tail end guide ring 21, a turning point stagnation ring 22, a launch point positioning ring 23 and an electrically controlled drive wheel 24. The tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 are all provided with electrically controlled drive wheels 24 on their inner sides. The tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 are all connected by a straight-line transmission connection component 5. The straight-line transmission connection component 5 is used to keep the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 centered along the path when they move along the pipeline. The turning point crossing measurement component 7 includes a light spot radiation generator 71 and a light spot receiving panel 72. The light spot radiation generator 71 is fixedly connected to the outer wall of the tail end guide ring 21, and the light spot receiving panel 72 is arranged on the outer side of the launch end centering measurement component 4.

[0026] In an optional implementation of the present embodiment, the straight transmission connection assembly 5 includes a plurality of connection seats 51, an intermediate fixed page 52, an embedded steering column 53, an anti-twisting connection column 54 and an intermediate reset torsion spring 55. An intermediate fixed page 52 and an anti-twisting connection column 54 are arranged between two adjacent connection seats 51. Both ends of the intermediate fixed page 52 are fixedly connected with the embedded steering column 53. The embedded steering column 53 is rotatably connected to the inner side of the connection seat 51. The anti-twisting connection column 54 is fixedly connected with the intermediate reset torsion spring 55. The two ends of the intermediate reset torsion spring 55 are respectively fixedly connected to the two adjacent connection seats 51.

[0027] In this embodiment, the electric control driving wheel 24 uses a driving motor and a transmission guide wheel, and the driving motor controls the rotation of the transmission guide wheel, so that the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 can slide along the outer side of the pipeline under the transmission action of the guide wheel. In addition, in order to maintain the continuity of the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 when they move along the outside of the pipeline, so that the launch point positioning ring 23 can cross the pipeline inflection point to reach the other end of the pipeline, the present invention uses a straight transmission connection component 5 to connect the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 in the moving state.

[0028] In this embodiment, the connecting seat 51, the intermediate fixed page 52 and the embedded steering column 53 in the straight transmission connection component 5 are used to maintain the connectivity between the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23. The specific use principle is that when the launch point positioning ring 23 reaches the turning point of the pipeline as driven by the electric control drive wheel 24, the movement path of the launch point positioning ring 23 is bent. In order to ensure that the launch point positioning ring 23 can still stably pull the tail end guide ring 21 and the turning point stagnation ring 22 to move synchronously when crossing the turning point of the pipeline, each adjacent connecting seat 51 is rotationally connected through the intermediate fixed page 52 and the embedded steering column 53. When the movement path of the launch point positioning ring 23 is bent, the embedded steering column 53 set at both ends of the intermediate fixed page 52 is rotated along the inner side of the connecting seat 51, and the launch point positioning ring 23 and the turning point stagnation ring 22 can adapt to the bending, which will not affect the movement of the launch point positioning ring 23.

[0029] In this embodiment, the anti-twisting connecting column 54 and the intermediate reset torsion spring 55 in the straight transmission connection assembly 5 are used to maintain a relatively stable spacing between the tail end guide ring 21, the inflection point stagnation ring 22 and the emission point positioning ring 23 when moving along the pipeline, so as to avoid the light spot matching generator 71 emitting the light spot too early or too late due to the change in the distance between the tail end guide ring 21, the inflection point stagnation ring 22 and the emission point positioning ring 23 when the light spot matching generator 71 and the light spot receiving panel 72 test whether the emission point positioning ring 23 crosses the inflection point of the pipeline, resulting in a test error. That is, when the tail end guide ring 21, the turning point stagnation ring 22 and the launching point positioning ring 23 move straight along the pipeline, the intermediate reset torsion spring 55 is not subjected to the tensile force and is fixed to the two anti-twisting connecting columns 54 for support, so that the connecting seat 51 and the intermediate fixing page 52 remain vertical until the launching point positioning ring 23 crosses the pipeline inflection point. The intermediate reset torsion spring 55 can adapt to the force generated when the launching point positioning ring 23 moves toward the pipeline inflection point and produce deformation, thereby maintaining the launching point positioning ring 23 to cross the pipeline inflection point along a curved path.

[0030] In an optional implementation of the present embodiment, the transmitting end centering measurement component 4 includes an inflection point motion measuring bracket 41, an embedded slider 42, a measuring midpoint displacement measuring mechanism 43 and a longitudinal height adjustment mechanism 44. The inflection point motion measuring bracket 41 is fixedly connected to the tail end guide ring 21, the longitudinal height adjustment mechanism 44 is fixedly connected to the embedded slider 42, the electromagnetic wave transmitter 6 is fixedly connected to the output end of the longitudinal height adjustment mechanism 44, the embedded slider 42 is slidably connected to the inner side of the inflection point motion measuring bracket 41, and there are two measuring midpoint displacement measuring mechanisms 43. The two measuring midpoint displacement measuring mechanisms 43 are symmetrically distributed and are both slidably connected to the inflection point motion measuring bracket 41.

[0031] In an optional implementation of this embodiment, a plurality of contact conductive balls 31 distributed in a semi-arc shape are rotatably connected to the bottom side of the measuring point calibration clamp ring 3 , and the measuring point calibration clamp ring 3 is fixedly connected to the electromagnetic wave transmitter 6 .

[0032] In this embodiment, the longitudinal height adjustment mechanism 44 uses a screw motor to adjust the longitudinal height of the measuring point calibration clamp 3. After the emission point positioning ring 23 crosses the inflection point of the pipeline and is confirmed to reach the other end of the pipeline through the light spot emission generator 71, the light spot receiving panel 72 and the measurement midpoint displacement measurement mechanism 43, the longitudinal height adjustment mechanism 44 drives the measuring point calibration clamp 3 to slide and extend downward until the measuring point calibration clamp 3 engages with the outside of the pipeline. In order to keep the emission base point of the electromagnetic wave transmitter 6 at the middle point of the pipeline after the measuring point calibration clamp 3 crosses the inflection point of the pipeline, when the measuring point calibration clamp 3 deviates from the middle point of the pipeline, since the embedded slider 42 and the outer shell of the longitudinal height adjustment mechanism 44 are fixedly connected, and the inflection point motion measurement bracket 41 and the embedded slider 42 are slidably connected, the force generated when the measuring point calibration clamp 3 contacts and squeezes the outer wall of the pipeline can directly make the embedded slider 42 slide adaptively inside the inflection point motion measurement bracket 41, so that the measuring point calibration clamp 3 can be automatically calibrated to the middle point of the pipeline through the sliding action of the inflection point motion measurement bracket 41 and the embedded slider 42, thereby improving the accuracy of the initial emission position of the electromagnetic wave of the electromagnetic wave transmitter 6. In addition, the setting of the contact conductive ball 31 is intended to reduce the contact friction when the measuring point calibration clamp 3 contacts the outer wall of the pipeline, that is, the measuring point calibration clamp 3 can move downward more smoothly when it is driven by the longitudinal height adjustment mechanism 44 to engage with the outside of the pipeline.

[0033] In an optional implementation of this embodiment, the light spot receiving panel 72 is fixedly connected to the outer wall of the inflection point motion measuring bracket 41, and the emitting surface of the light spot matching generator 71 and the receiving surface of the light spot receiving panel 72 are in the same horizontal plane.

[0034] In this embodiment, the light spot receiving panel 72 can be installed on one side wall of the emission point positioning ring 23 using a horizontal array of photosensors, and the light spot matching generator 71 can be installed using a light spot laser emitter. The light spot matching generator 71 is arranged at the upper end of the tail end guide ring 21. When the tail end guide ring 21 and the emission point positioning ring 23 move straight, the photoelectric signal emitted by the light spot matching generator 71 is captured by the light spot receiving panels 72 arranged in a horizontal row, until the emission point positioning ring 23 crosses the inflection point of the pipeline, and the receiving surface of the light spot receiving panel 72 is offset from the emitting surface of the light spot matching generator 71. After the light spot receiving panel 72 cannot receive the emission signal generated by the light spot matching generator 71, it is first determined that the emission point positioning ring 23 drives the electromagnetic wave emitter 6 to complete the crossing of the pipeline inflection point, and then the midpoint displacement measurement mechanism 43 performs a secondary verification on whether the electromagnetic wave emitter 6 crosses the pipeline inflection point.

[0035] In this embodiment, a single chip microcomputer is selected as the point measurement signal processor 12, and the point measurement signal processor 12 is used for signal transmission and obtaining the receiving response data of the light spot receiving panel 72, that is, when the point measurement signal processor 12 obtains that the light spot receiving panel 72 cannot receive the transmitting signal generated by the light spot radiation generator 71, it sends an enabling signal to the measuring midpoint displacement measuring mechanism 43, and verifies whether the electromagnetic wave transmitter 6 crosses the pipeline inflection point through the measuring midpoint displacement measuring mechanism 43.

[0036] In an optional implementation of this embodiment, the midpoint displacement measuring mechanism 43 is composed of a sliding rod, a guide wheel and a displacement sensor, the guide wheel is rotatably connected to the sliding rod, the sliding rod is slidably connected to the inner side of the inflection point motion measuring bracket 41, and the displacement sensor is arranged on the inner side of the inflection point motion measuring bracket 41, and is used to measure whether the sliding rod is displaced when the electromagnetic wave transmitter 6 reaches the electromagnetic wave transmitting base point. In order to keep the sliding rod quickly reset when the transmitting point positioning ring 23 crosses the pipeline inflection point and resumes straight movement, a reset spring is installed between the sliding rod and the inner wall of the inflection point motion measuring bracket 41.

[0037] In this embodiment, the principle of measuring the midpoint displacement measuring mechanism 43 to verify whether the electromagnetic wave transmitter 6 crosses the inflection point of the pipeline is: when the tail end guide ring 21, the inflection point stagnation ring 22 and the emission point positioning ring 23 move along the pipeline, the guide wheel in the midpoint displacement measuring mechanism 43 plays a role in guiding the sliding contact with the inner wall of the pipeline gallery, and at the same time, the displacement sensor in the midpoint displacement measuring mechanism 43 determines the sliding displacement of the inner side of the measuring bracket 41 when the guide wheel is squeezed by the inner wall of the pipeline gallery when the tail end guide ring 21, the inflection point stagnation ring 22 and the emission point positioning ring 23 slide straight along the pipeline, until the emission point positioning ring 23 crosses the inflection point of the pipeline, so that the receiving surface of the light spot receiving panel 72 and the emitting surface of the light spot matching generator 71 generate After the offset, the light spot receiving panel 72 obtains the measurement of the midpoint displacement measurement mechanism 43 after crossing the pipeline. When the guide wheel is squeezed by the inner wall of the pipeline gallery, the sliding displacement of the sliding rod moving toward the turning point to measure whether the displacement of the inner side of the bracket 41 is consistent with the displacement generated by the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 when they move straight. That is, when they are consistent, the launch point positioning ring 23 crosses the pipeline turning point to reach the straight arrangement interval under the pipeline. After crossing the pipeline turning point, the launch point positioning ring 23 is twice verified to be parallel to the pipeline distribution surface. If they are parallel, the point measurement signal processor 12 can send a start signal to the longitudinal height control mechanism 44 to control the measurement point calibration clamp 3 to press down so that the electromagnetic wave transmitter 6 and the middle point of the pipeline are adjusted to the same position. If they are not parallel, the launch point positioning ring 23 is driven to move by the electric control drive wheel 24.

[0038] The working principle of the present invention is: first, the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 are transmitted along the outer side of the pipeline to the selected measurement base point through the electric control driving wheel 24 as the driving member. During the transmission process, the tail end guide ring 21, the turning point stagnation ring 22 and the launch point positioning ring 23 are kept connected when they move to the turning point of the pipeline through the straight transmission connection component 5, so that the electromagnetic wave transmitter 6 set at one end of the launch point positioning ring 23 can stably cross the turning point of the pipeline to reach the launch base point, avoiding multiple reflections and refractions of the electromagnetic wave, and at the same time of transmission, the light spot radiation generator 71 sends an approval ray to the light spot receiving panel 72, and the light spot receiving panel 72 verifies whether the current launch point positioning ring 23 crosses the turning point of the pipeline and extends to the other end of the pipeline according to the ray receiving surface, that is, the light spot receiving panel 72 cannot continue to sense light After the point-to-point generator 71 emits a light spot, it is determined that the emission point positioning ring 23 has completed the crossing of the pipeline inflection point. Then, two sets of symmetrically distributed midpoint displacement measurement mechanisms 43 sense the sliding displacement with the inner wall of the pipeline gallery during the transmission process, and secondarily verify whether the emission point positioning ring 23 remains parallel to the pipeline distribution surface after crossing the pipeline inflection point. After remaining parallel, the longitudinal height control mechanism 44 can be used to drive the measuring point calibration clamp 3 to extend downward, so that the measuring point calibration clamp 3 contacts the outer wall of the pipeline. At this time, the measuring point calibration clamp 3 is squeezed to make the embedded slider 42 slide adaptively on the inner side of the inflection point motion measurement bracket 41, so that the pipeline measuring point calibration clamp 3 is completely in contact with the outer wall of the pipeline. When the electromagnetic wave transmitter 6 is quickly calibrated to the middle point of the pipeline, after calibration, electromagnetic waves can be emitted by the electromagnetic wave transmitter 6 to detect pipeline damage.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electromagnetic wave transmitting device for an underground pipeline, comprising an electromagnetic wave signal receiving processor (1) and an electromagnetic wave transmitter (6), wherein the electromagnetic wave signal receiving processor (1) is signal-connected to the electromagnetic wave transmitter (6), and is characterized in that: A straight-direction holding and traction mechanism (2), a measuring point calibration clamp (3), a transmitting end centering and measuring component (4), a straight-direction transmission connection component (5), and an inflection point passing and measuring component (7) are installed on one side of the electromagnetic wave transmitter (6); the straight-direction holding and traction mechanism (2) is used to drive the electromagnetic wave transmitter (6) to transmit along the outer diameter of the pipeline to an artificially selected electromagnetic wave transmitting base point; the measuring point calibration clamp (3) is installed at one end of the transmitting end centering and measuring component (4); the straight-direction transmission connection component (5) is installed on the inner side of the straight-direction holding and traction mechanism (2); and the inflection point passing and measuring component (7) is arranged between the transmitting end centering and measuring component (4) and the straight-direction holding and traction mechanism (2); The straight-line holding traction mechanism (2) comprises a tail end guide ring (21), an inflection point stagnation ring (22), a launch point positioning ring (23) and an electrically controlled drive wheel (24); the tail end guide ring (21), the inflection point stagnation ring (22) and the launch point positioning ring (23) are all provided with an electrically controlled drive wheel (24) inside; the tail end guide ring (21), the inflection point stagnation ring (22) and the launch point positioning ring (23) are all connected via the straight-line transmission connection assembly (5); The transmission connection component (5) is used to keep the tail end guide ring (21), the inflection point stagnation ring (22) and the emission point positioning ring (23) centered along the path of the pipeline, and the inflection point crossing measurement component (7) includes a light spot emission generator (71) and a light spot receiving panel (72), wherein the light spot emission generator (71) is fixedly connected to the outer wall of the tail end guide ring (21), and the light spot receiving panel (72) is arranged on the outer side of the emission end centering measurement component (4); The straight transmission connection assembly (5) comprises a plurality of connection seats (51), an intermediate fixing page (52), an embedded steering column (53), an anti-twisting connection column (54) and an intermediate return torsion spring (55); an intermediate fixing page (52) and an anti-twisting connection column (54) are arranged between two adjacent connection seats (51); both ends of the intermediate fixing page (52) are fixedly connected to the embedded steering column (53); the embedded steering column (53) is rotatably connected to the inner side of the connection seat (51); the anti-twisting connection column (54) is fixedly connected to the intermediate return torsion spring (55); and both ends of the intermediate return torsion spring (55) are respectively fixedly connected to the two adjacent connection seats (51); The transmitting end centering determination component (4) comprises an inflection point motion measurement bracket (41), an embedded slider (42), a measurement midpoint displacement measurement mechanism (43) and a longitudinal height control mechanism (44); the inflection point motion measurement bracket (41) is fixedly connected to the tail end guide ring (21); the longitudinal height control mechanism (44) is fixedly connected to the embedded slider (42); the electromagnetic wave transmitter (6) is fixedly connected to the output end of the longitudinal height control mechanism (44); the embedded slider (42) is slidably connected to the inner side of the inflection point motion measurement bracket (41); there are two measurement midpoint displacement measurement mechanisms (43); the two measurement midpoint displacement measurement mechanisms (43) are symmetrically distributed and are both slidably connected to the inflection point motion measurement bracket (41); A plurality of contact surface conductive balls (31) distributed in a semi-arc shape are rotatably connected to the bottom side of the measuring point calibration clamp ring (3), and the measuring point calibration clamp ring (3) is fixedly connected to the electromagnetic wave transmitter (6).

2. The underground pipeline electromagnetic wave transmitting device according to claim 1, characterized in that: The electromagnetic wave signal receiving processor (1) comprises a terminal signal processor (11), a point measurement signal processor (12) and a receiving antenna (13); the point measurement signal processor (12) and the receiving antenna (13) are both integrated and installed in the terminal signal processor (11); the point measurement signal processor (12) and the measurement midpoint displacement measuring mechanism (43) are both signal-connected to the light spot receiving panel (72).

3. The underground pipeline electromagnetic wave transmitting device according to claim 1, characterized in that: The midpoint displacement measuring mechanism (43) is composed of a sliding rod, a guide wheel and a displacement sensor, the guide wheel is rotatably connected to the sliding rod, the sliding rod is slidably connected to the inner side of the inflection point motion measuring bracket (41), and the displacement sensor is arranged on the inner side of the inflection point motion measuring bracket (41) and is used to measure whether the sliding rod is displaced when the electromagnetic wave transmitter (6) reaches the electromagnetic wave transmission base point.

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