Device and method for measuring pipe diameter of underground pipeline

Abstract

The invention relates to the technical field of underground pipeline measurement, in particular to an underground pipeline pipe diameter measuring device and method.The underground pipeline pipe diameter measuring device comprises a vehicle frame and a measuring module arranged on the vehicle frame, the measuring module comprises a shell arranged on the vehicle frame, and the underground pipeline pipe diameter measuring device further comprises a probe, a controller and a controller, the sensor is movably arranged in the shell and can be driven by a measuring point switching mechanism arranged in the shell to move along the circumference; the reciprocating swing mechanism is arranged in the shell and has a forward motion form and a reverse motion form; according to the invention, the probe can be strictly controlled to be in the power-off state in the measuring point switching process, the probe can be automatically recovered to the power-on state after the measuring point switching is completed, the mechanical interlocking cooperation is utilized, the mechanical interlocking cooperation is utilized, and the power-on state of the probe can be controlled to be in the power-off state in the measuring point switching process. The device is higher in stability and suitable for being used in underground pipeline measurement working environments.

Description

Technical Field

[0001] The invention relates to the technical field of underground pipeline measurement, and in particular to a device and a method for measuring the diameter of an underground pipeline. Background Art

[0002] The measurement of underground pipeline diameters can help construction workers understand the specific location, direction and depth of underground pipelines, thereby avoiding damage to existing pipelines during construction and ensuring the safety and accuracy of construction. At the same time, it can provide important basic data for urban planning. These data are helpful in formulating reasonable urban development plans, optimizing the use of underground space, and providing a scientific basis for subsequent construction and management.

[0003] There are many methods for measuring the diameter of underground pipelines. Among them, using the reflection characteristics of ultrasound to measure the diameter is a common method. However, in the existing measurement method, the staff usually pushes the measurement module along a pre-planned measurement path to perform measurements. However, at a single measurement point, the measurement range of the pipeline is limited. When there are serious problems of pipeline corrosion and aging within the measurement range, accidental errors will occur, resulting in inaccurate measurement results. In this regard, the staff may need to adjust the position of a single measurement point several times in small increments, which increases the complexity of the operation. In addition, during the adjustment process, it is easy for the measurement to deviate from the path, and it is easy to mismeasure other interfering data (outliers), resulting in low average accuracy of the final data. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for measuring the diameter of an underground pipeline to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for measuring the diameter of an underground pipeline, comprising a frame and a measuring module arranged on the frame, wherein the measuring module comprises a shell arranged on the frame, and further comprises:

[0007] A probe is movably disposed in the housing and can be driven by a measuring point switching mechanism disposed in the housing to move along a circle to change a measuring point;

[0008] The reciprocating swing mechanism is arranged in the shell and has two motion forms, forward and reverse. When the forward motion form ends, the probe can be powered off. When in the reverse motion form, the probe can be prompted to change the measuring point. After the reverse motion form ends, the probe is restored to the power-on state.

[0009] As a further solution of the present invention: the reciprocating swing mechanism comprises a driving motor installed in the housing, and the output shaft of the driving motor is connected to a rotating structure through a one-way transmission structure;

[0010] The rotating structure comprises a vertical shaft rotatably installed in the shell and a mounting beam fixed to the vertical shaft. The probe is mounted on the mounting beam, and a switching structure for switching the power on and off state of the probe is provided on the mounting beam.

[0011] As a further solution of the present invention: a mounting seat is slidably engaged in the guide groove, the switching structure includes a contact installed on the mounting seat and connected to a power supply, the contact is adapted to the interface on the probe, and the mounting seat is connected to a deflection ejection assembly arranged on the output shaft of the drive motor.

[0012] As a further solution of the present invention: the deflection ejection assembly includes a swing plate fixed on the output shaft of the driving motor, the swing plate is provided with a slide groove, a first slider and a second slider are slidably engaged in the slide groove, the first slider is provided with a two-way ejection member, and the second slider is connected to the mounting seat through a follower structure.

[0013] As a further solution of the present invention: the bidirectional ejection member includes a cross arm fixed on the first slider and a cross bar arranged on the cross arm, two ends of the cross bar respectively penetrate two lugs formed at two ends of the cross arm and are slidably connected to the lugs, and the outer circumference of the cross bar is also sleeved with a first spring and a second spring.

[0014] Among them, the head ends of the first spring and the second spring are connected and fixed to the round table on the cross bar, and the tail ends are respectively abutted against the two lugs. One end of the cross bar is fixed to the second slider, and the other end is connected to the limiting piece with the boss fixed on the cross arm.

[0015] As a further solution of the present invention: the position-limiting member comprises a fan-shaped plate fixed in the housing and concentric with the output shaft of the driving motor, and the fan-shaped plate is provided with a fan-shaped slot body and a combined slot body respectively adapted to the cross bar and the convex column;

[0016] Among them, the end of the cross bar away from the second slider and the boss are respectively placed in the fan-shaped groove body and the combined groove body and are slidably connected to the fan-shaped plate. When the boss moves along the combined groove body, it can prompt the first slider to move along the length direction of the swing plate.

[0017] As a further solution of the present invention: the follower structure comprises a first sleeve and a second sleeve which are respectively slidably sleeved on the output shaft of the driving motor and the vertical shaft, a connecting plate is provided between the first sleeve and the second sleeve, and two ends of the connecting plate are respectively rotatably connected to the first sleeve and the second sleeve;

[0018] Among them, a first connecting rod is provided between the first sleeve and the second slider, and the two ends of the first connecting rod are respectively hinged to the first sleeve and the second slider; a second connecting rod is provided between the second sleeve and the mounting seat, and the two ends of the second connecting rod are respectively hinged to the second sleeve and the mounting seat.

[0019] As a further solution of the present invention: the one-way transmission structure includes a driving ring fixed to the end of the output shaft of the driving motor and a transmission shaft rotatably installed in the housing and connected to the vertical shaft through a transmission belt, the transmission shaft is slidably sleeved with a telescopic shaft body, and the telescopic shaft body is connected to a third spring arranged in the transmission shaft;

[0020] Among them, the telescopic shaft is provided with a strip-shaped protrusion, the transmission shaft is provided with a strip-shaped groove adapted to the strip-shaped protrusion, the telescopic shaft is fixedly connected with a driven ring, the driven ring is abutted against the driving ring, the driving ring is provided with a plurality of driving teeth equidistantly along the circumference, the driven ring is provided with a plurality of slots equidistantly along the circumference adapted to the driving teeth, and an inclined surface and a vertical surface are formed in the slot.

[0021] A method for measuring the diameter of an underground pipeline, using the measuring device, comprises the following steps:

[0022] Step 1: determine the measurement path and mark multiple measurement points along the measurement path;

[0023] Step 2: Push the frame to stop at multiple measuring points in sequence;

[0024] Step 3, the reciprocating swing mechanism moves in a forward motion form, causing the probe to be powered off;

[0025] Step 4: the reciprocating swing mechanism moves in a reverse motion form, the measuring point switching mechanism drives the probe to change the measuring point, and restores the power supply state after the measuring point is changed;

[0026] Step 5: According to the measurement results of each point on the measurement path, the computer analyzes and processes the data to obtain the pipe diameter data.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present application utilizes the dual-mode motion of the reciprocating swing mechanism, namely the forward mode and the reverse mode. When in the forward motion mode, the power-on and power-off states of the probe are switched to ensure that when the reciprocating swing mechanism is in the reverse motion mode, that is, when the probe is changing the measuring point, the probe can be in the power-off state, thereby preventing the misdetection of interfering data, resulting in low average accuracy of the final data.

[0029] Secondly, during the measurement process, the reciprocating swing mechanism can make multiple changes in the single measuring point of the measuring path through multiple movements, which can effectively increase the measurement range and avoid large accidental errors caused by locations with serious corrosion and aging of the pipeline, so as to improve the accuracy of the measurement. It does not require the staff to make multiple adjustments at a single measuring point, thus simplifying the measurement operation.

[0030] In addition, the present application can strictly control the power-off state of the probe during the measurement point switching process, and automatically restore the power-on state after the measurement point switching is completed. By utilizing mechanical interlocking, the stability is higher and it is suitable for use in underground pipeline measurement working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a structural schematic diagram of an embodiment of a device for measuring the diameter of underground pipelines.

[0032] Figure 2 The present invention is a schematic structural diagram from another angle of an embodiment of a device for measuring the diameter of underground pipelines.

[0033] Figure 3 The present invention is a schematic structural diagram of an embodiment of a device for measuring the diameter of underground pipelines from another angle.

[0034] Figure 4 The present invention is a structural schematic diagram from another angle of an embodiment of a device for measuring the diameter of underground pipelines.

[0035] Figure 5 The present invention is a schematic diagram of the structure of a measuring module in one embodiment of a device for measuring the diameter of an underground pipeline.

[0036] Figure 6 This is a schematic structural diagram of a measuring module from another angle in one embodiment of a device for measuring the diameter of an underground pipeline.

[0037] Figure 7 The present invention is a schematic diagram of the connection state of a measuring point switching mechanism and a reciprocating swing mechanism in one embodiment of a device for measuring the diameter of an underground pipeline.

[0038] Figure 8 for Figure 7 Schematic diagram of the structure from another angle.

[0039] Fig. 9 for Figure 7Schematic diagram of the structure from another angle.

[0040] Fig.10 The present invention is a schematic diagram of the assembly of a probe in one embodiment of a device for measuring the diameter of an underground pipeline.

[0041] Fig.11 This is a structural exploded diagram of a reciprocating swing mechanism in one embodiment of a device for measuring the diameter of an underground pipeline.

[0042] Fig.12 for Fig.11 A magnified view of the structure at center.

[0043] Fig.13 The present invention is a schematic structural diagram of a sector plate in one embodiment of a device for measuring the diameter of an underground pipeline.

[0044] In the figure: 1, frame; 2, measuring module; 3, housing; 4, guide ring; 5, assembly beam; 501, guide groove; 6, mounting seat; 7, probe; 8, vertical shaft; 9, contact; 10, interface; 11, drive motor; 12, swing plate; 1201, slide groove; 13, round table; 14, first spring; 15, second spring; 16, first slider; 17, second slider; 18, crossbar; 19, cross arm; 1901, lug; 1902, boss; 20, fan plate; 2001, first Arc groove; 2002, first straight groove; 2003, second arc groove; 2004, second straight groove; 2005, third arc groove; 2006, third straight groove; 21, driving ring; 22, transmission shaft; 2201, strip groove; 23, third spring; 24, telescopic shaft; 2401, strip protrusion; 25, driven ring; 2501, inclined surface; 2502, vertical surface; 26, first sleeve; 27, second sleeve; 28, connecting plate; 29, first connecting rod; 30, second connecting rod. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0047] See also Figure 1-Figure 13 In an embodiment of the present invention, a device for measuring the diameter of an underground pipeline includes a frame 1 and a measuring module 2 disposed on the frame 1, wherein the measuring module 2 includes a housing 3 disposed on the frame 1, and further includes:

[0048] A probe 7 is movably disposed in the housing 3 and can be driven by a measuring point switching mechanism disposed in the housing 3 to move along a circle to change a measuring point;

[0049] It should be noted that the measurement principle of the pipe diameter in the present application is based on ultrasonic technology, that is, when working, the ultrasonic measuring instrument on the frame 1 transmits high-frequency ultrasonic waves through the probe 7, and calculates the distance between the signal emission point and the pipeline according to the transmission speed of the ultrasonic wave by receiving the reflection time of the ultrasonic signal. Then, through further analysis and processing, a curve can be drawn by computer according to the calculated multiple distances to obtain the pipe diameter parameters. This aspect is the application of the prior art, and the present application will not elaborate on it.

[0050] The reciprocating swing mechanism is arranged in the shell 3 and has two motion modes, forward and reverse. When the forward motion mode ends, the probe 7 can be powered off. When in the reverse motion mode, the probe 7 can be prompted to change the measuring point. After the reverse motion mode ends, the probe 7 is restored to the power-on state.

[0051] Furthermore, in the specific implementation, the staff should first determine the measurement position, push the frame 1 to the determined measurement position, and then start the ultrasonic measuring instrument, and the probe 7 can start to emit high-frequency ultrasonic waves. After the current point is measured, the reciprocating swing mechanism works;

[0052] The reciprocating swing mechanism first moves in a forward motion form, during which the measuring point switching mechanism is not triggered, and when the process is terminated, the probe 7 will be powered off and stop emitting high-frequency ultrasonic waves. Subsequently, the reciprocating swing mechanism moves in a reverse motion form, during which the measuring point switching mechanism is triggered, so that the probe 7 moves along the circumference to change the measuring point position, and when the process is terminated, the probe 7 is restored to the power-on state;

[0053] Furthermore, while realizing the measurement point switching function, the present application can effectively disconnect the power supply state of the probe 7 before switching, thereby avoiding measuring other interfering data during the measurement point switching process.

[0054] In this way, the probe 7 can perform measurements at multiple points, thereby improving the measurement range of the pipeline. The frame 1 can measure multiple groups of measurement data at a single measurement position, and the measurement accuracy can be improved by taking the average value. In addition, since underground pipelines (especially metal pipes) are underground for a long time, they may be corroded by chemical substances in the soil, groundwater and surrounding environment (such as acidic and alkaline substances, salt, etc.). These factors will cause an oxide layer or a corrosion layer to form on the surface of the metal pipe, thereby causing accidental errors in the measurement. In this regard, the present application uses the measuring point switching mechanism to adjust the position of the probe 7, thereby reducing the accidental errors caused by the formation of an oxide layer or a corrosion layer on the surface of the metal pipe.

[0055] Please refer again Figure 7 , Figure 8 as well as Fig. 9 The reciprocating swing mechanism includes a driving motor 11 installed in the shell 3, and the output shaft of the driving motor 11 is connected to a rotating structure through a one-way transmission structure; the rotating structure includes a vertical shaft 8 rotatably installed in the shell 3 and an assembly beam 5 fixed to the vertical shaft 8, the probe 7 is installed on the assembly beam 5, and the assembly beam 5 is provided with a switching structure for switching the power-on and power-off states of the probe 7.

[0056] Furthermore, the forward and reverse motion modes of the reciprocating swing mechanism correspond to the forward and reverse rotations of the output shaft of the drive motor 11, respectively. When the output shaft of the drive motor 11 rotates in the reverse direction, the vertical shaft 8 can be driven to rotate through the one-way transmission structure. Therefore, the vertical shaft 8 can drive the probe 7 to change the measuring point through the assembly beam 5.

[0057] In order to improve the stability of the movement of the probe 7, a guide ring 4 is also fixed in the shell 3, the inner wall of the guide ring 4 is provided with a guide groove, and the two ends of the assembly beam 5 are respectively fixed with a guide block (not numbered in the figure) that is slidably engaged with the guide ring 4 through the guide groove. Specifically, a mounting frame is also provided on the guide ring 4, and the drive motor 11 is installed on the mounting frame.

[0058] The assembly beam 5 is provided with a guide groove 501, and a mounting seat 6 is slidably engaged in the guide groove 501. The switching structure includes a contact 9 installed on the mounting seat 6 and connected to a power supply. The contact 9 is adapted to the interface 10 on the probe 7. The mounting seat 6 is connected to a deflection ejection assembly arranged on the output shaft of the drive motor 11.

[0059] It should be noted that, during operation, the assembly beam 5 rotates, and therefore, the positions of the probe 7, the mounting seat 6, and the contact 9 are not fixed. To facilitate the connection between the contact 9 and the power supply, the vertical shaft 8 is hollow to form a path for the connecting line to pass through.

[0060] Please refer again Figure 7 , Fig.11 as well as Fig.13 The deflection ejection assembly includes a swing plate 12 fixed on the output shaft of the driving motor 11, a slide groove 1201 is provided on the swing plate 12, a first slider 16 and a second slider 17 are slidably engaged in the slide groove 1201, a bidirectional ejection member is provided on the first slider 16, and the second slider 17 is connected to the mounting seat 6 through a follower structure. The bidirectional ejection member includes a cross arm 19 fixed on the first slider 16 and a cross bar 18 provided on the cross arm 19, two ends of the cross bar 18 respectively penetrate two lugs 1901 formed at two ends of the cross arm 19 and are slidably connected to the lugs 1901, and a first spring 14 and a second spring 15 are also sleeved on the outer periphery of the cross bar 18. The first and second springs 14 and 15 are connected to the truncated table 13 on the crossbar 18 at their head ends, and their tail ends are respectively in contact with the two lugs 1901. One end of the crossbar 18 is fixed to the second slider 17, and the other end and the boss 1902 fixed to the cross arm 19 are connected to a limiting member. The limiting member includes a fan-shaped plate 20 fixed in the housing 3 and concentric with the output shaft of the drive motor 11, and the fan-shaped plate 20 is provided with a fan-shaped slot body and a combined slot body respectively adapted to the crossbar 18 and the boss 1902.

[0061] In detail (see Fig.13 ), the fan-shaped slot body includes a first arc-shaped slot 2001, a first straight slot 2002, a second arc-shaped slot 2003 and a second straight slot 2004 which are connected to each other, the first arc-shaped slot 2001 and the second arc-shaped slot 2003 are both centered on the output shaft of the driving motor 11, and the first straight slot 2002 and the second straight slot 2004 are both arranged along the radial direction of the fan-shaped plate 20;

[0062] Secondly, the combined groove body includes a third arc groove 2005 and a third straight groove 2006 connected to each other, the third arc groove 2005 takes the output shaft of the drive motor 11 as the center, and the distance between one end of the third straight groove 2006 away from the third arc groove 2005 and the output shaft of the drive motor 11 is greater than the distance between the third arc groove 2005 and the drive motor 11.

[0063] The end of the cross bar 18 away from the second slider 17 and the boss 1902 are respectively placed in the fan-shaped groove body and the combined groove body and are slidably connected to the fan-shaped plate 20. When the boss 1902 moves along the combined groove body, it can prompt the first slider 16 to move along the length direction of the swing plate 12.

[0064] Attach Fig. 9 Taking the state shown as an example, at this time, the end of the cross bar 18 away from the second slider 17 is located at the connection between the first arc groove 2001 and the second straight groove 2004, the boss 1902 is located at the end of the third arc groove 2005 away from the third straight groove 2006, and the contact 9 and the interface 10 are in a docking state;

[0065] When the measuring point needs to be changed, the driving motor 11 drives the swing plate 12 to swing forward. During this process, the one-way transmission structure is not triggered, the orientation of the probe 7 does not change, the end of the cross bar 18 away from the second slider 17 (hereinafter referred to as the end of the cross bar 18) moves along the first arc groove 2001, and the boss 1902 moves along the third arc groove 2005 and the third straight groove 2006 in turn. When the boss 1902 is located in the third straight groove 2006, it will cause the cross arm 19 to drive the first slider 16 to give way, that is, the first slider 16 slides in the slide groove 1201 away from the output shaft of the driving motor 11, and the first spring 14 is compressed;

[0066] When the positive deflection process of the swing plate 12 is finished, the end of the cross bar 18 reaches the connection between the first arc groove 2001 and the first straight groove 2002, and the first spring 14 rebounds, so that the end of the cross bar 18 quickly switches to the connection between the first straight groove 2002 and the second arc groove 2003. Accordingly, the cross bar 18 pulls the second slider 17 to slide in the slide groove 1201 away from the output shaft of the drive motor 11, and the second slider 17 drives the mounting seat 6 to slide toward the vertical shaft 8 through the follower structure, and the contact 9 is pulled out of the interface 10, and the probe 7 is powered off;

[0067] Subsequently, the drive motor 11 drives the swing plate 12 to deflect in the opposite direction. During this process, the one-way transmission structure is triggered, so that the vertical shaft 8 rotates synchronously with the output shaft of the drive motor 11, so as to change the measuring point of the probe 7. Accordingly, the end of the cross bar 18 moves along the second arc groove 2003, and the probe 7 remains in the power-off state. The boss 1902 moves along the third straight groove 2006 and the third arc groove 2005 in turn. The boss 1902 prompts the cross arm 19 to drive the first slider 16 to slide close to the output shaft of the drive motor 11, and the second spring 15 is compressed.

[0068] When the reverse deflection process of the swing plate 12 is completed, the end of the cross bar 18 reaches the connection between the second arc groove 2003 and the second straight groove 2004, and then the second spring 15 rebounds, and the end of the cross bar 18 quickly switches to the connection between the first arc groove 2001 and the second straight groove 2004. Accordingly, the cross bar 18 pushes the second slider 17 to slide toward the output shaft of the drive motor 11, and the second slider 17 drives the mounting seat 6 to slide away from the vertical shaft 8 through the follow-up structure, and the contact 9 re-docking with the interface 10, and the probe 7 resumes the power-on state.

[0069] In summary, by utilizing the coordination of the mechanical structure, the on-off state switching of the probe 7 before and after the measuring point switching is realized. Further, if the rotation of the vertical shaft 8 is directly driven by a stepper motor, the on-off state switching of the probe 7 is controlled by an electric control switch. In this way, before the stepper motor works, the electric control switch needs to be closed to cut off the power of the probe 7. After the stepper motor finishes working, the electric control switch is opened again. Furthermore, the work of the stepper motor and the electric control switch needs to establish a certain logical sequence, which requires corresponding program control. However, according to the working environment of underground pipeline measurement, the stability of program control is not good. The present application can strictly control the probe 7 to be in a power-off state during the measuring point switching process, and automatically restore the power-on state after the measuring point switching is completed. By utilizing mechanical interlocking, the stability is higher and it is suitable for use in the underground pipeline measurement working environment.

[0070] The follow-up structure includes a first sleeve 26 and a second sleeve 27 which are respectively slidably sleeved on the output shaft of the driving motor 11 and the vertical shaft 8, and a connecting plate 28 is provided between the first sleeve 26 and the second sleeve 27, and the two ends of the connecting plate 28 are respectively rotatably connected to the first sleeve 26 and the second sleeve 27. A first connecting rod 29 is provided between the first sleeve 26 and the second slider 17, and the two ends of the first connecting rod 29 are respectively hinged to the first sleeve 26 and the second slider 17, and a second connecting rod 30 is provided between the second sleeve 27 and the mounting seat 6, and the two ends of the second connecting rod 30 are respectively hinged to the second sleeve 27 and the mounting seat 6.

[0071] When the first spring 14 rebounds, that is, the positive deflection of the swing plate 12 ends, the cross bar 18 pulls the second slider 17 to slide away from the output shaft of the drive motor 11, and the second slider 17 pulls the first sleeve 26 to slide upward on the output shaft of the drive motor 11 through the first connecting rod 29, and the first sleeve 26 drives the second sleeve 27 to slide upward on the vertical shaft 8 through the connecting plate 28, and the second sleeve 27 pulls the mounting seat 6 to slide toward the vertical shaft 8 through the second connecting rod 30, so that the contact 9 is withdrawn from the interface 10, and the probe 7 is powered off. When the second spring 15 rebounds, that is, the reverse deflection of the swing plate 12 (the measuring point switching of the probe 7 is completed) ends, the cross bar 18 pushes the second slider 17 to slide toward the output shaft of the drive motor 11, and then, the mounting seat 6 slides away from the vertical shaft 8, so that the contact 9 re-docking the interface 10, and the probe 7 resumes the power-on state.

[0072] Please refer again Figure 8 , Fig.11 as well as Fig.12 The one-way transmission structure includes a driving ring 21 fixed to the end of the output shaft of the driving motor 11 and a transmission shaft 22 rotatably installed in the housing 3 and connected to the vertical shaft 8 through a transmission belt. The transmission shaft 22 is slidably fitted with a telescopic shaft 24, and the telescopic shaft 24 is connected to a third spring 23 provided in the transmission shaft 22. A strip-shaped protrusion 2401 is provided on the telescopic shaft 24, and a strip-shaped groove 2201 adapted to the strip protrusion 2401 is provided in the transmission shaft 22. A driven ring 25 is fixedly connected to the telescopic shaft 24, and the driven ring 25 abuts against the driving ring 21. A plurality of driving teeth are equidistantly provided on the driving ring 21 along the circumference, and a plurality of slots adapted to the driving teeth are equidistantly provided on the driven ring 25 along the circumference, and an inclined surface 2501 and a vertical surface 2502 are formed in the slot.

[0073] When the driving motor 11 drives the driving ring 21 to rotate forward, the driving teeth act on the inclined surface 2501, thereby causing the driven ring 25 to retreat (the setting of the guide ring 4 can not only improve the stability of the rotation of the assembly beam 5, but also make the friction between the guide block at the end of the assembly beam 5 and the guide ring 4 larger, so that the driving teeth cannot cause the vertical shaft 8 to rotate when acting on the inclined surface 2501), that is, the telescopic shaft 24 slides toward the inside of the transmission shaft 22, and the third spring 23 is compressed;

[0074] On the contrary, when the driving motor 11 drives the driving ring 21 to rotate in the opposite direction, the driving teeth act on the vertical surface 2501, so that the driving ring 21 can drive the telescopic shaft 24 to rotate through the driven ring 25, and then the telescopic shaft 24 drives the transmission shaft 22 to rotate through the strip protrusion 2401 and the strip groove 2201, and the transmission shaft 22 drives the vertical shaft 8 to rotate through the transmission belt, thereby realizing the change of the measuring point of the probe 7.

[0075] As another embodiment of the present invention, a method for measuring the diameter of an underground pipeline is also proposed, using the measuring device, comprising the following steps:

[0076] Step 1: determine the measurement path and mark multiple measurement points along the measurement path;

[0077] Step 2, pushing the frame 1 to stop at multiple measuring points in sequence;

[0078] Step 3, the reciprocating swing mechanism moves in a forward motion form, causing the probe 7 to be powered off;

[0079] Step 4: the reciprocating swing mechanism moves in the reverse motion form, the measuring point switching mechanism drives the probe 7 to change the measuring point, and restores the power supply state after the measuring point is changed;

[0080] Step 5: According to the measurement results of each point on the measurement path, the computer analyzes and processes the data to obtain the pipe diameter data.

[0081] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0082] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for measuring the diameter of an underground pipeline, comprising a frame (1) and a measuring module (2) arranged on the frame (1), wherein the measuring module (2) comprises a housing (3) arranged on the frame (1); It is characterized in that Also includes: A probe (7) is movably disposed in the housing (3) and can be driven by a measuring point switching mechanism disposed in the housing (3) to move along a circle to change a measuring point; The reciprocating swing mechanism is arranged in the housing (3) and has two motion forms, forward and reverse. When the forward motion form ends, the probe (7) can be powered off. When in the reverse motion form, the probe (7) can be prompted to change the measuring point. After the reverse motion form ends, the probe (7) is restored to the powered state.

2. The underground pipeline diameter measuring device according to claim 1, characterized in that: The reciprocating swing mechanism comprises a driving motor (11) installed in the housing (3), and the output shaft of the driving motor (11) is connected to a rotating structure via a one-way transmission structure; The rotating structure comprises a vertical shaft (8) rotatably mounted in the housing (3) and a mounting beam (5) fixed to the vertical shaft (8); the probe (7) is mounted on the mounting beam (5), and a switching structure for switching the power on and off state of the probe (7) is provided on the mounting beam (5).

3. The underground pipeline diameter measuring device according to claim 2, characterized in that: The assembly beam (5) is provided with a guide groove (501), a mounting seat (6) is slidably engaged in the guide groove (501), the switching structure comprises a contact (9) mounted on the mounting seat (6) and connected to a power supply, the contact (9) is adapted to an interface (10) on the probe (7), and the mounting seat (6) is connected to a deflection ejection assembly arranged on an output shaft of the drive motor (11).

4. The underground pipeline diameter measuring device according to claim 3, characterized in that: The deflection ejection assembly comprises a swing plate (12) fixed on the output shaft of the driving motor (11), the swing plate (12) is provided with a slide groove (1201), a first slider (16) and a second slider (17) are slidably engaged in the slide groove (1201), the first slider (16) is provided with a bidirectional ejection member, and the second slider (17) is connected to the mounting seat (6) via a follower structure.

5. The underground pipeline diameter measuring device according to claim 4, characterized in that: The bidirectional ejection member comprises a cross arm (19) fixed on the first sliding block (16) and a cross bar (18) arranged on the cross arm (19), two ends of the cross bar (18) respectively penetrate two lugs (1901) formed at two ends of the cross arm (19) and are slidably connected to the lugs (1901), and the outer periphery of the cross bar (18) is also sleeved with a first spring (14) and a second spring (15); The head ends of the first spring (14) and the second spring (15) are connected and fixed to the truncated table (13) on the cross bar (18), and the tail ends are respectively abutted against the two lugs (1901); one end of the cross bar (18) is fixed to the second slider (17), and the other end is connected to a limiting member with a lug (1902) fixed to the cross arm (19).

6. The device for measuring the diameter of underground pipelines according to claim 5, characterized in that: The limiting member comprises a fan-shaped plate (20) fixed in the housing (3) and concentric with the output shaft of the drive motor (11), and the fan-shaped plate (20) is provided with a fan-shaped groove body and a combined groove body respectively adapted to the cross bar (18) and the convex column (1902); Among them, the end of the cross bar (18) away from the second slider (17) and the boss (1902) are respectively placed in the fan-shaped groove body and the combined groove body and are slidably connected to the fan-shaped plate (20). When the boss (1902) moves along the combined groove body, it can prompt the first slider (16) to move along the length direction of the swing plate (12).

7. The underground pipeline diameter measuring device according to claim 4, characterized in that: The follower structure comprises a first sleeve (26) and a second sleeve (27) which are respectively slidably mounted on the output shaft of the driving motor (11) and the vertical shaft (8); a connecting plate (28) is provided between the first sleeve (26) and the second sleeve (27); two ends of the connecting plate (28) are respectively rotatably connected to the first sleeve (26) and the second sleeve (27); A first connecting rod (29) is provided between the first sleeve (26) and the second slider (17), and two ends of the first connecting rod (29) are respectively hinged to the first sleeve (26) and the second slider (17); a second connecting rod (30) is provided between the second sleeve (27) and the mounting seat (6), and two ends of the second connecting rod (30) are respectively hinged to the second sleeve (27) and the mounting seat (6).

8. The underground pipeline diameter measuring device according to claim 2, characterized in that: The one-way transmission structure comprises a driving ring (21) fixed to the end of the output shaft of the driving motor (11) and a transmission shaft (22) rotatably mounted in the housing (3) and connected to the vertical shaft (8) via a transmission belt, the transmission shaft (22) being slidably sleeved with a telescopic shaft body (24), and the telescopic shaft body (24) being connected to a third spring (23) arranged in the transmission shaft (22); The telescopic shaft (24) is provided with a strip-shaped protrusion (2401), the transmission shaft (22) is provided with a strip-shaped groove (2201) adapted to the strip-shaped protrusion (2401), the telescopic shaft (24) is fixedly connected with a driven ring (25), the driven ring (25) is in contact with the driving ring (21), a plurality of driving teeth are equidistantly provided on the driving ring (21) along the circumference, a plurality of slots adapted to the driving teeth are equidistantly provided on the driven ring (25), and an inclined surface (2501) and a vertical surface (2502) are formed in the slots.

9. A method for measuring the diameter of an underground pipeline, using the measuring device as claimed in claim 1, characterized in that: The following steps are involved: Step 1: determine the measurement path and mark multiple measurement points along the measurement path; Step 2, pushing the frame (1) to stop at multiple measuring points in sequence; Step 3, the reciprocating swing mechanism moves in a forward motion form, causing the probe (7) to be powered off; Step 4: the reciprocating swing mechanism moves in a reverse motion form, the measuring point switching mechanism drives the probe (7) to change the measuring point, and restores the power supply state after the measuring point is changed; Step 5: According to the measurement results of each point on the measurement path, the computer analyzes and processes the data to obtain the pipe diameter data.

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