A pipeline inner diameter measuring device and method

Abstract

The invention relates to the field of measurement technology, and specifically discloses a device and method for measuring the inner diameter of a pipeline. The device comprises a coupling sleeve and a hollow rotating shaft installed in the pipeline, an inner shaft is installed inside the rotating shaft through a bearing, an actuator component is fixedly arranged at the end of the rotating shaft, the actuator component comprises a first sleeve, a solid body is arranged inside the first sleeve to form a slot body, the inner shaft extends into a central slot and a guide plate is screwed and installed at the end, a third wedge is arranged in an outer peripheral array of the guide plate, a measuring unit is abutted on the third wedge, and a rust removal unit is arranged at an end away from the center of the guide slot; the invention realizes the integrated integration of rust removal and measurement functions by arranging a rust removal unit and a measuring unit with switchable positions in the actuator component; a centering component is arranged to avoid eccentric measurement; and more comprehensive pipeline inner diameter data are obtained by cooperating with the centering component and the actuator component to perform measurement at different depths inside the pipeline, thereby improving measurement accuracy, simplifying the operation process, and obtaining more comprehensive measurement data.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and in particular to a pipeline inner diameter measurement device and method. Background Art

[0002] Cast iron pipes are widely used in municipal water supply and drainage, industrial transportation and other fields due to their excellent mechanical properties and economy. In the production and use of pipes, accurate measurement of the inner diameter is of great significance to ensure the quality and safe operation of the pipes. Since cast iron pipes are used in humid environments for a long time, their inner walls generally have varying degrees of rust. These rusts not only form irregular protrusions, but are often accompanied by the attachment of impurities such as silt and scale. These rusts and impurities will significantly affect the actual inner diameter of the pipe, resulting in distortion of the measurement data. They may also damage the measuring tools and affect subsequent pipeline maintenance work.

[0003] Currently, commonly used methods for detecting the inner diameter of pipelines include ultrasonic measurement, laser measurement, endoscopic detection, and traditional mechanical measurement, but these methods all have obvious limitations. Although ultrasonic measurement is non-destructive, the material properties of cast iron pipes will affect the propagation of ultrasonic waves, and the rust on the inner wall will cause signal scattering, and the measurement results are not accurate enough; laser measurement equipment is expensive, sensitive to ambient light, and has poor reflection effect on rusted surfaces; endoscopic detection can only be performed visually, and cannot obtain accurate dimensional data, and is limited by light conditions; traditional mechanical measurement tools such as vernier calipers have limited measurement depth and cannot be used for bending pipe measurement, and the accuracy is heavily dependent on manual operation.

[0004] Chinese patent document (publication number: CN110966949A) discloses a method and device for measuring the inner diameter of a rainwater and sewage pipe, belonging to the field of surveying and mapping technology, the method comprises: step S1, selecting a reference point inside a circular pipe; step S2, measuring the length value of the distance between the reference point and the inner wall of the circular pipe in any three measuring directions in a cross centered on the reference point; step S3, according to a triangle formed by the three measuring points, processing the three length values ​​respectively to obtain the lengths of the three sides of the triangle; step S4, processing the three sides of the triangle to obtain the diameter value of the circumscribed circle corresponding to the triangle; the device comprises: a measuring end and a control end, the measuring end comprises: a distance measurement module, a processing module; the beneficial effect is: the measurement result is accurate, and the means are diverse, and it can effectively cope with the inner diameter measurement of complex pipe types, which greatly improves the convenience.

[0005] In the prior art, the inner wall of the cast iron pipe is prone to rust, which affects the measurement accuracy. Before measuring the inner diameter, it is usually necessary to perform rust removal separately. This step-by-step operation method not only increases the workload, but also easily causes secondary pollution. Traditional measuring devices often lack effective centering components, which can easily cause eccentricity during measurement or rust removal, resulting in inaccurate measurement data. Most existing measuring devices measure near the pipe mouth, which makes it difficult to measure deep into the pipe and cannot fully reflect the changes in the inner diameter of the pipe. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a device and method for measuring the inner diameter of a pipeline. The actuator component of the device is provided with a rust removal unit and a measuring unit that can switch positions. After the inner wall of the pipeline is cleaned by the rust removal unit, the measuring unit is switched to measure the cleaned part to ensure measurement accuracy. A centering component is provided near the actuator component to avoid eccentricity and improve measurement accuracy. Data is obtained by measuring at different depths inside the pipeline by the centering component and the actuator component, so as to more comprehensively reflect the change in the inner diameter of the pipeline.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] The cam is an axially oriented hollow cylindrical body, and the cam is provided with a plurality of cylindrical bodies, each of which is provided with a plurality of cylindrical bodies, and the cylindrical bodies are provided with a plurality of cylindrical bodies, each of which is provided with a plurality of cylindrical bodies. The cylindrical bodies are provided with a plurality of cylindrical bodies, and the cylindrical bodies are provided with a plurality of cylindrical bodies. The cylindrical bodies are provided with a plurality of cylindrical bodies, and the cylindrical bodies are provided with a plurality of cylindrical bodies.

[0009] Preferably, the rust removal unit includes a lifting plate, and two guide rails symmetrically fixed inside the first sleeve, a guide rod is slidably installed inside the guide rail, both ends of the guide rod are hinged to the bottom end of the lifting plate through connecting rods, the connecting rods opposite to each other on both sides are connected by a cross bar, an outer sleeve rod is vertically fixed on the cross bar, an inner sleeve rod is sleeved inside the outer sleeve rod, a second spring is sleeved on the inner sleeve rod, the lifting plate passes through the side wall of the first sleeve and extends to the outside, and a brush wire is fixed on the top of the first sleeve.

[0010] Preferably, the measuring unit comprises a connecting block and a fourth wedge, the fourth wedge is slidably mounted inside the guide groove, the fourth wedge is arranged to abut against the inclined surface of the third wedge, a measuring component is fixedly arranged on the side of the fourth wedge close to the pipeline, a limiting groove and a reset groove are provided on the fourth wedge close to the outer side of the solid body, a reset spring is provided in the reset groove, one end of the reset spring is fixedly connected to the end of the reset groove away from the center, the other end of the reset spring is fixedly arranged on the connecting block, the connecting block extends out of the fourth wedge and is fixedly connected to the solid body of the first sleeve, the limiting groove is a T-shaped structure, a T-shaped limiting body is provided on the solid body corresponding to the limiting groove, and the T-shaped limiting body is slidably mounted in the limiting groove; a connecting rod is hingedly connected to the side of the outer sleeve close to the fourth wedge, a bayonet is provided on the side of the fourth wedge close to the connecting rod, and the end of the connecting rod can be detachably clamped in the bayonet; a third spring is provided on the side of the connecting rod close to the rust removal unit, and a limiting column is fixedly arranged between the rust removal unit and the measuring unit.

[0011] Preferably, the measuring component includes two symmetrically arranged support blocks, and slide grooves are provided on opposite sides of the support blocks. A guide rod is fixed inside the slide groove, and a guide block and a fourth spring are sleeved on the guide rod. A roller is installed between the guide blocks on both sides; a detection block is provided at the bottom of the guide block, and a distance sensor is provided at the bottom of the slide groove.

[0012] Preferably, the power assembly includes a motor, an output gear is installed at the output end of the motor, the output gear meshes with the transmission gear, a keyway is provided on the rotating shaft, and the transmission gear is detachably mounted on the rotating shaft through the keyway.

[0013] Preferably, it also includes a centering component, which includes a second sleeve and a wedge-shaped push plate. The second sleeve is installed on the rotating shaft through a sleeve, and three T-slots are arranged in an array on the second sleeve body, wherein the T-slots connect the radial direction and the circumferential direction, and a second wedge is installed radially in the T-slot, and the second wedge is connected to the second sleeve through a first spring; the wedge-shaped push plate includes a ring body, and three first wedges are fixed on the ring body, and the first wedges are all slidably installed in the axial direction of the T-slot, and one end of the ring body away from the first wedge is connected to the thrust sleeve, and the other end of the thrust sleeve abuts the thrust component; when the thrust component drives the thrust sleeve to approach the second sleeve, the inclined surfaces of the first wedge and the second wedge abut and displace, so that the second wedge moves toward the direction close to the pipeline.

[0014] Preferably, the thrust assembly includes a threaded sleeve, a nut, an adjusting sleeve, and a first ring sleeve and a second ring sleeve fixed coaxially. The outer periphery of the first ring sleeve is detachably connected to the pipe by a screw, and the threaded sleeve is fixedly installed inside the second ring sleeve. The threaded sleeve is sleeved on the rotating shaft. The threaded sleeve includes an oblique thread body and a flat thread body that are fixedly connected. The flat thread body is located on a side close to the first ring sleeve. The oblique thread body is threadedly connected to the nut and fixedly connected to the rotating shaft. The adjusting sleeve is threadedly connected to the flat thread body. A retaining ring is provided on the side of the second sleeve away from the thrust assembly, and the retaining ring is detachably connected to the rotating shaft.

[0015] Preferably, the coupling sleeve is a stepped sleeve structure, a spline groove is arranged inside the coupling sleeve, and splines are arranged at the ends of the rotating shaft and the inner shaft.

[0016] Preferably, a disc scale is arranged on the end of the rotating shaft away from the actuator, and a pointer is arranged on the inner shaft near the disc scale.

[0017] Preferably, a method for measuring using the pipeline inner diameter measuring device comprises the following steps:

[0018] S1: Initial installation: fix the actuator to the end of the shaft, move the actuator to the target A in the pipeline, and install the centering assembly inside the pipeline opening, wherein the pipe wall inside the pipeline opening has been rust-free in advance;

[0019] S2: Centering and fixing: The double ring sleeve structure consisting of the first ring sleeve, the second ring sleeve, the threaded sleeve and the nut cooperates with the power component to fix the centering component on the inner wall of the pipe to ensure the stability of the measurement reference;

[0020] S3: Function switching and measurement: After removing the double-ring structure, thrust sleeve and adjustment sleeve, start the power assembly to drive the rotating shaft and the actuator to rotate, and drive the rust removal assembly to remove rust from the inside of the pipeline; after the rust removal is completed, the rust removal unit is retracted into the actuator by adjusting the rotation of the inner shaft, and the measuring unit is driven to extend to measure the inner diameter of the pipeline at the target A and obtain data;

[0021] S4: Position transfer: After completing the measurement at target A, disassemble the detection device, move the actuator to the next measurement position target B, and install the centering assembly at the target A where the measurement has been completed, and use the previous measurement point as the new centering support position;

[0022] S5: Repeat measurement: Repeat the operations of steps S2 to S3 at the target B to complete the rust removal and measurement work at the target B;

[0023] S6: Progressive deepening: When it is necessary to measure deeper into the pipeline, repeat steps S4 to S5 to gradually complete the measurement work at different depths, where each position that has been measured can be used as the centering support for the next measurement point.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The device of the present invention realizes the integrated integration of rust removal and measurement functions by arranging switchable rust removal units and measuring units in the execution component, thereby avoiding the problem of increased workload caused by traditional step-by-step operation; the rust removal unit is used to clean the inner wall of the pipeline and then the measuring unit is switched to measure, thereby ensuring the accuracy of the measurement data; a centering component is provided to avoid eccentric measurement, thereby further improving the measurement accuracy; the centering component cooperates with the execution component to measure at different depths inside the pipeline, thereby obtaining more comprehensive data on the change in the inner diameter of the pipeline; at the same time, by arranging multiple groups of rust removal units and measuring units, synchronous measurement of the inner diameters at different angles with the same center is realized, thereby effectively improving the measurement efficiency and accuracy of the roundness of the pipeline; the present invention improves the measurement accuracy, simplifies the operation process, and obtains more comprehensive measurement data.

[0026] 2. The device of the present invention is provided with a switchable rust removal unit and a measuring unit in the execution component. In the initial state, the lifting plate of the rust removal unit is located in the through hole of the side plate of the first sleeve, and the measuring unit is located near the guide plate to prevent the measuring unit from being contaminated by impurities. When the rust removal operation is performed, the power component drives the rotating shaft to rotate, driving the first sleeve, the lifting plate and the brush wire to rotate together inside the pipeline, and the brush wire efficiently completes the cleaning work of the inner wall of the pipeline. When it is necessary to switch to the measuring state, the inner shaft is rotated, and the guide plate and the third wedge are driven to move away from the power component by screw connection. The third wedge pushes the fourth wedge to move radially outward along the first sleeve, and at the same time drives the connecting rod to move, pushing the outer rod and the cross rod to approach. The inner sleeve rod moves in the direction of the inner sleeve rod, thereby driving the connecting rod to move away from the end of the lifting plate, so that the lifting plate moves down along the inner wall of the first sleeve and exits the through-opening, thereby ensuring the reliability of function switching; after the lifting plate exits the through-opening, it moves with the guide rod, and at the same time the fourth wedge is displaced outward and drives the connecting rod to abut against the limit rod and disengage from the bayonet, so that the measuring component on the top of the fourth wedge enters the through-opening, thereby realizing the measurement of the inner diameter of the pipeline; when the fourth wedge is disengaged from the lifting plate, under the action of the spring assembly, the lifting plate and other components are automatically reset, and the connecting rod re-enters the bayonet of the fourth wedge to ensure the stability of the measuring component; the device of the present invention realizes the seamless connection between rust removal and measurement functions, improves efficiency, and ensures the accuracy of measurement.

[0027] 3. The device of the present invention adopts the cooperation of the centering component and the double ring sleeve structure to realize the in-depth measurement function of the inner diameter of the pipeline. The centering component forms a stable support in the pipeline through the cooperation of the wedge-shaped push plate in the second sleeve and the thrust component to ensure the concentricity of the measurement reference; the double ring sleeve structure is connected by a threaded pair to realize axial displacement, and the wedge-shaped push plate is driven to push out the wedge of the centering component and fix it to the inner wall of the pipe to realize the centering step;

[0028] During the progressive depth measurement process, after each measuring point is derusted and measured, the point is transformed into the centering support position of the next measuring point. The clean pipe wall that has been measured is used as the new centering reference, and the actuator continues to extend deeper into the pipeline to measure the next point. This point-to-point progressive method not only ensures the reliability of the measurement reference, but also realizes the effective transmission of measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the device of the present invention in the rust removal state;

[0030] Figure 2 A three-dimensional schematic diagram of the centering assembly of the device of the present invention when being positioned;

[0031] Figure 3 It is a partial cross-sectional perspective schematic diagram of the centering component of the device of the present invention;

[0032] Figure 4 It is a schematic diagram of the matching structure between the ring body and the thrust sleeve of the wedge-shaped push plate of the device of the present invention;

[0033] Figure 5 It is a three-dimensional schematic diagram of the component structure of the thrust assembly of the device of the present invention;

[0034] Figure 6 It is a three-dimensional schematic diagram of the matching structure of the coupling sleeve and the spline of the device of the present invention;

[0035] Figure 7 This is a three-dimensional schematic diagram of the internal structure of the execution component of the device of the present invention;

[0036] Figure 8 The three-dimensional schematic diagram of the measuring unit and rust removal unit of the device of the present invention Figure 1 ;

[0037] Fig. 9 The three-dimensional schematic diagram of the measuring unit and rust removal unit of the device of the present invention Figure 2 ;

[0038] Fig.10 It is a three-dimensional schematic diagram of the matching structure of the measuring components of the device of the present invention;

[0039] In the figure:

[0040] Pipeline-11; first sleeve-12; second sleeve-13; rotating shaft-14; inner shaft-15; coupling sleeve-16; motor-17; output gear-18; transmission gear-19; ring body-20; first wedge-21; thrust sleeve-22; first ring sleeve-23; screw-24; second ring sleeve-25; flat thread body-26; oblique thread body-27; adjusting sleeve-28; nut-29; retaining ring-30; sleeve-31; T-slot-32; second wedge-33; first spring-34; bearing locking sleeve-35; dovetail groove-36; dovetail slider-37; guide plate-38; third Wedge-39; measuring unit-40; rust removal unit-41; fourth wedge-42; connecting block-43; reset groove-44; bayonet-45; connecting rod-46; measuring component-47; guide rail-48; guide rod-49; connecting rod-50; cross bar-51; outer sleeve rod-52; inner sleeve rod-53; second spring-54; lifting plate-55; brush wire-56; fixing plate-57; third spring-58; limiting column-59; reset spring-60; supporting block-61; roller-62; guide block-63; guide rod-64; fourth spring-65; detection block-66; distance sensor-67. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0042] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] Figure 1-Figure 10As shown in the figure, a pipeline inner diameter measuring device includes a coupling sleeve 16 and a hollow rotating shaft 14 installed in a pipeline 11, an inner shaft 15 is installed inside the rotating shaft 14 through a bearing, an actuator is fixed at the end of the rotating shaft 14, and the actuator includes a first sleeve 12, a solid body is arranged in the first sleeve 12 to form a slot body, the slot body includes a central slot and a guide slot, the inner shaft 15 extends into the central slot and a guide plate 38 is screwed and installed at the end, and a third wedge 39 is arranged in an outer peripheral array of the guide plate 38, and the third wedges 39 are all located in the guide slots. A measuring unit 40 is arranged in abutment with the guide groove, and a rust removal unit 41 is arranged at one end away from the center of the guide groove, and the rust removal unit 41 passes through the side wall of the first sleeve 12 and extends to the outside; the ends of the rotating shaft 14 and the inner shaft 15 away from the first sleeve 12 are connected by a coupling sleeve 16, and a power assembly is arranged on the rotating shaft 14 near the coupling sleeve 16; when the power assembly is started, the first sleeve 12 is driven to rotate so that the rust removal unit cleans the inner wall of the pipeline, and when the coupling sleeve 16 is used to drive the inner shaft 15 to rotate, the measuring unit and the rust removal unit are switched in position to realize the measurement of the inner diameter of the pipeline.

[0044] Among them, a groove body is formed inside the first sleeve 12, and the groove body includes a central groove and a guide groove. The central groove is connected to the guide groove. The guide grooves are arrayed with the center of the first sleeve 12 as the center, and two are named as a group. The guide grooves can be set in 1 group, 2 groups or 3 groups, etc., and the third wedges 39 are all located in the guide grooves 38.

[0045] When the guide groove and the third wedge 39 cooperate for measurement, one component can directly measure the inner diameter of the pipe at the current position. When two or three or more groups are set at the same time, the inner diameters of the pipes at different positions can be obtained at the same time, thereby improving the measurement accuracy of the inner diameter. In this state, multiple groups of measurement data are measured in a concentric state, which is conducive to quickly measuring the roundness of the pipe.

[0046] The actuator of the device of the present invention is provided with a rust removal unit 41 and a measuring unit 40 that can switch positions. After the inner wall of the pipeline is cleaned by the rust removal unit 41, the measuring unit 40 is switched to measure the cleaned part to ensure the measurement accuracy. A centering component is arranged near the actuator to avoid eccentricity and improve the measurement accuracy. The centering component and the actuator are used to measure at different depths inside the pipeline 11 to obtain data, which more comprehensively reflects the change in the inner diameter of the pipeline. By arranging multiple groups of rust removal units 41 and measuring units 40, the inner diameters at different angles with the same center are measured, which is conducive to quickly measuring the roundness of the pipeline.

[0047] Furthermore, the rust removal unit 41 includes a lifting plate 55, and two guide rails 48 symmetrically fixed inside the first sleeve 12, a guide rod 49 is slidably installed inside the guide rail 48, and both ends of the guide rod 49 are hinged to the bottom end of the lifting plate 55 through connecting rods 50 respectively, and the connecting rods 50 opposite to each other on both sides are connected by a cross bar 51, an outer sleeve rod 52 is vertically fixed on the cross bar 51, an inner sleeve rod 53 is sleeved inside the outer sleeve rod 52, and a second spring 54 is sleeved on the inner sleeve rod 53, the lifting plate 55 passes through the side wall of the first sleeve 12 and extends to the outside, and a brush wire 56 is fixed to the top of the first sleeve 12; the rotating shaft 14 is fixedly connected to the first sleeve 12.

[0048] See also Figure 7 , Figure 8 and Fig. 9 In normal state, the lifting plate 55 of the rust removal unit 41 is in the through hole of the side plate of the first sleeve 12 to prevent external impurities from entering the first sleeve 12 and affecting the measurement accuracy of the measuring unit. The measuring unit 40 is located near the guide plate 38;

[0049] When rust removal is performed, the rotating shaft 14 is driven to rotate by the power assembly, driving the first sleeve 12, the lifting plate 55 and the brush wire 56 to rotate inside the pipe 11, so that the brush wire 56 cleans the inner wall of the pipe 11;

[0050] When the rust removal is completed, by rotating the inner shaft 15, the guide plate 38 and the third wedge 39 are driven to move away from the power assembly through the screw connection. The third wedge 39 causes the fourth wedge 42 above to move outward along the radial direction of the first sleeve 12, and at the same time drives the connecting rod 46 to move. The connecting rod 46 pushes the outer rod sleeve 52 and the cross bar 51 to move toward the inner sleeve rod 53, and further drives the end of the connecting rod 50 away from the lifting plate 55 to move toward the inner sleeve rod 53. At this time, the lifting plate 55 moves down along the inner wall of the first sleeve 12 (see Figure 7 ), the lifting plate 55 gradually withdraws from the through-hole of the first sleeve 12, and then the lifting plate 55 moves together with the guide rod 49 in a direction close to the inner sleeve rod 53 (the two adjacent connecting rods 50 are staggered to avoid interference); during this process, the fourth wedge 42 is displaced in a direction away from the center, and the fourth wedge 42 and the measuring component 47 gradually extend to the outside of the first sleeve 12 to measure the inner diameter of the pipeline 11.

[0051] It should be noted that one end of the third spring 58 is connected to the connecting rod 46, and the other end is connected to the fixing plate 57, and the fixing plate 57 is fixedly connected to the inside of the first sleeve 12;

[0052] When the fourth wedge 42 extends outward, the connecting rod 46 is driven to abut against the limiting rod 59, and the connecting rod 46 is separated from the bayonet 45 of the fourth wedge 42. Under the action of the third spring 58, the end of the connecting rod 46 is kept between the fourth wedge 42 and the center of the first sleeve 12, which is conducive to the end of the connecting rod 46 entering the bayonet 45 when the measuring unit is recovered and reset, so as to facilitate the next measurement and complete the automatic reset;

[0053] After the connecting rod 46 is disengaged from the bayonet 45 of the fourth wedge 42, the top of the fourth wedge 42 is located in the through hole of the first sleeve 12, and the bottom of the fourth wedge 42 contacts the lifting plate 55; when the fourth wedge 42 moves toward the center and disengages from the lifting plate 55, the outer sleeve rod 52, the cross rod 51, the connecting rod 50 and the lifting plate 55 are pushed together to move away from the inner sleeve rod 53 under the rebound effect of the second spring 54, and the lifting plate 55 moves outward along the guide groove wall and extends (see Figure 7 ), at this time, the end of the connecting rod 46 enters the bayonet 45 of the fourth wedge 42 under the action of the third spring 58, and is ready for the next cycle.

[0054] It should be noted that the corner of the lifting plate 55 adjacent to the fourth wedge 42 is set to be an arc shape, and the corner of the fourth wedge 42 adjacent to the lifting plate 55 is set to be an arc shape, so that the lifting plate 55 and the fourth wedge 42 can pass smoothly when they move relative to each other.

[0055] The use positions of the rust removal unit and the measuring unit are switched by adjusting the inner shaft 15. During the rust removal process, the opening is always sealed to prevent external impurities from contaminating the measuring unit.

[0056] Furthermore, the measuring unit 40 includes a connecting block 43 and a fourth wedge 42, the fourth wedge 42 is slidably mounted inside the guide groove, the fourth wedge 42 is abutted against the inclined surface of the third wedge 39, a measuring component 47 is fixedly arranged on the side of the fourth wedge 42 close to the pipeline 11, a limiting groove and a reset groove 44 are provided on the fourth wedge 42 close to the outer side of the solid body, a reset spring 60 is arranged in the reset groove 44, one end of the reset spring 60 is fixedly connected to the end of the reset groove 44 away from the center, and the other end of the reset spring 60 is fixedly arranged with the connecting block 43, and the connecting block 43 extends out of the fourth wedge The body 42 is fixedly connected to the solid body of the first sleeve 12 outside, the limit groove is a T-shaped structure, a T-shaped limit body is arranged on the solid body corresponding to the limit groove, and the T-shaped limit body is slidably installed in the limit groove; a connecting rod 46 is hinged on the side of the outer sleeve rod 52 close to the fourth wedge 42, and a bayonet 45 is provided on the side of the fourth wedge 42 close to the connecting rod 46, and the end of the connecting rod 46 can be detachably connected to the bayonet 45; a third spring 58 is arranged on the side of the connecting rod 46 close to the rust removal unit 41, and a limit column 59 is fixedly arranged between the rust removal unit 41 and the measuring unit 40.

[0057] See also Figure 7 , Figure 8 and Fig. 9 The connecting block 43 is fixedly connected to the solid body of the first sleeve 12 , and one end of the connecting block 43 is located inside the reset groove 44 and connected to the reset spring 60 . This design facilitates the fourth wedge 42 on the outside to shrink back to its initial position close to the first sleeve 12 .

[0058] The limiting groove is a T-shaped structure. A T-shaped limiting body is arranged on the solid body corresponding to the limiting groove. The T-shaped limiting body is slidably installed in the limiting groove. This design ensures that the fourth wedge 42 always moves along the direction of the guide groove, thereby ensuring the integrity of the guide structure.

[0059] Furthermore, the measuring component 47 includes two symmetrically arranged support blocks 61, and slide grooves are provided on opposite sides of the support blocks 61. A guide rod 64 is fixed inside the slide groove, and a guide block 63 and a fourth spring 65 are sleeved on the guide rod 64. A roller 62 is installed between the guide blocks 63 on both sides; a detection block 66 is provided at the bottom of the guide block 63, and a distance sensor 67 is provided at the bottom of the slide groove.

[0060] See also Figure 7 and Fig.10 When the roller 62 contacts the inner wall of the pipe 11 to form an extrusion, the guide block 63 and the detection block 66 are driven to move, and data is obtained through the distance sensor 67. After the measurement is completed, the guide block 63 and the roller 62 are restored to the initial position together under the action of the fourth spring 65;

[0061] When measuring the inner diameter of the pipe 11, first install the centering component inside the pipe 11, rotate the inner shaft 15 to move the lifting plate 55 and the measuring component 47 to the outside of the first sleeve 12, and continue to rotate the inner shaft 15 to make the measuring component 47 contact the inner wall of the pipe 11; calculate the distance from the measuring component to the center according to the number of rotations of the inner shaft 15, and then integrate the data obtained by the distance sensor 67 on the measuring component 47 to obtain the inner diameter value.

[0062] Furthermore, the power assembly includes a motor 17, an output gear 18 is installed at the output end of the motor 17, the output gear 18 meshes with a transmission gear 19, a keyway is provided on the rotating shaft 14, and the transmission gear 19 is detachably installed on the rotating shaft 14 through the keyway.

[0063] See also Figure 1 and Figure 2 A power assembly is used during rust removal, but no power assembly is required during measurement. A keyway is provided on the rotating shaft 14, and the rotating shaft 14 and the transmission gear are transmitted through the keyway, which is also conducive to rapid disassembly and installation.

[0064] Furthermore, it also includes a centering component, which includes a second sleeve 13 and a wedge-shaped push plate. The second sleeve 13 is installed on the rotating shaft 14 through a sleeve 31. Three T-slots 32 are arranged in an array on the body of the second sleeve 13. The T-slots 32 connect the radial direction and the circumferential direction. Second wedges 33 are radially installed in the T-slots 32, and the second wedges 33 are connected to the second sleeve 13 through first springs 34; the wedge-shaped push plate includes a ring body 20, and three first wedges 21 are fixed on the ring body 20. The first wedges 21 are all slidably installed in the axial direction of the T-slots 32. One end of the ring body 20 away from the first wedges 21 is connected to the thrust sleeve 22, and the other end of the thrust sleeve 22 abuts the thrust component; when the thrust component drives the thrust sleeve 22 to approach the second sleeve 13, the first wedge 21 and the second wedge 33 are inclined and abutted and displaced, so that the second wedge 33 moves toward the direction close to the pipeline 11.

[0065] See also Figure 3 The second sleeve 13 is installed outside the shaft sleeve 31, and the interior of the shaft sleeve 31 is connected to the rotating shaft 14 through the bearing locking sleeve 35, which is convenient for quick installation and removal. A retaining ring 30 is arranged on the side of the second sleeve 13 away from the thrust assembly. The retaining ring 30 is detachably connected to the rotating shaft 14. The retaining ring 30 provides an axial limiting force for the second sleeve 13, which is convenient for the first wedge 21 of the wedge-shaped push plate to be smoothly pushed into the thrust sleeve 22, so that the three second wedges 33 are all moved toward the inner wall of the pipeline 11 to form abutment. The expansion angle of the three second wedges 33 is 120°, and the axis of the rotating shaft 14 is moved to be coaxial with the center of the pipeline 11, which plays a centering role. Among them, a roller is also arranged on the second wedge 33, which is convenient for contacting and moving with the inner wall of the pipeline 11 and quickly adjusting the position.

[0066] See also Figure 4 , three dovetail grooves 36 are arranged in a circumferential array on the ring body 20, and a dovetail slider 37 is fixedly arranged at the end of the thrust sleeve 22. The dovetail groove 36 is arc-shaped, the inside of the dovetail groove 36 is wide, and the outside of the dovetail groove 36 is narrow. The outside of one end of the dovetail groove 36 is the same width as the inside, which is conducive to the dovetail slider 37 entering the limit position;

[0067] When in use, the dovetail slider 37 is inserted into the dovetail groove 36 and rotated to be fixedly connected. When disassembly is required, the dovetail slider 37 is rotated in the opposite direction and then taken out.

[0068] Furthermore, the thrust assembly includes a threaded sleeve, a nut 29, an adjusting sleeve 28, and a first ring sleeve 23 and a second ring sleeve 25 fixed coaxially. The outer periphery of the first ring sleeve 23 is detachably connected to the pipe 11 through a screw rod 24, and the threaded sleeve is fixedly installed inside the second ring sleeve 25. The threaded sleeve is sleeved on the rotating shaft 14. The threaded sleeve includes a fixedly connected oblique thread body 27 and a flat thread body 26. The flat thread body 26 is located on the side close to the first ring sleeve 23. The oblique thread body 27 is threadedly connected to the nut 29 and fixedly connected to the rotating shaft 14. The adjusting sleeve 28 is threadedly connected to the flat thread body 26. A retaining ring 30 is provided on the side of the second sleeve 13 away from the thrust assembly, and the retaining ring 30 is detachably connected to the rotating shaft 14.

[0069] See also Figure 2 and Figure 5 The thrust assembly provides thrust for the wedge-shaped push plate, wherein the second ring sleeve 25 is coaxial with the pipe 11 through the cooperation of the first ring sleeve 23 and the screw rod 24, the center position of the rotating shaft 14 is determined, and the center of the centering assembly is further ensured to coincide with the center of the pipe 11.

[0070] A threaded sleeve is fixedly installed inside the second ring sleeve 25, and the rotating shaft 14 is installed inside the threaded sleeve. One end of the threaded sleeve is an oblique thread body 27, and the other end is a flat thread body 26. When the oblique thread body 27 cooperates with the nut 29, the threaded sleeve and the rotating shaft 14 are fixed; the axial displacement is achieved by rotating the adjusting sleeve 28 on the flat thread body 26, thereby generating a thrust on the wedge-shaped push plate, so that the first wedge 21 of the wedge-shaped push plate can smoothly enter the thrust sleeve 22, so that the three second wedges 33 are all moved toward the inner wall of the pipeline 11 to form abutment, and the axis of the rotating shaft 14 is moved to be coaxial with the center of the pipeline 11, which plays a centering role.

[0071] When it is necessary to perform rust removal measurement on the targets A and B inside the pipe 11 (target B is deeper than target A):

[0072] First, fix the actuator to the end of the rotating shaft 14, move the actuator to the target A in the pipe 11, and install the centering assembly inside the opening of the pipe 11 (where rust has been removed in advance);

[0073] Secondly, the double ring sleeve structure consisting of the first ring sleeve 23, the second ring sleeve 25, the threaded sleeve and the nut is used to cooperate with the power assembly to fix the centering assembly;

[0074] Next, the coupling sleeve 16 is removed, the rust removal unit 41 is retracted by adjusting the rotation of the inner shaft 15, and the measuring unit 40 is extended to measure and obtain the inner diameter data;

[0075] Finally, disassemble the device, move the actuator to target B, install the centering assembly at target A, and repeat the above operations to remove rust and measure target B;

[0076] When you need to measure a deeper target, repeat the above operation.

[0077] Furthermore, the coupling sleeve 16 is a stepped sleeve structure, a spline groove is arranged inside the coupling sleeve 16, and splines are arranged at the ends of the rotating shaft 14 and the inner shaft 15.

[0078] See also Figure 6 The coupling sleeve 16 is a stepped sleeve structure with large and small diameters. The large diameter end of the coupling sleeve 16 is slidably connected to the rotating shaft 14 through a spline fit, and the small diameter end of the coupling sleeve 16 is slidably connected to the inner shaft 15 through a spline fit; when rust removal is required, the coupling sleeve 16 rotates the shaft 14 and the inner shaft 15, and is fixedly connected with a pin so that the two rotate together; when measurement is required, the coupling sleeve 16 is detached from the rotating shaft 14, and the coupling sleeve 16 is used alone to rotate the inner shaft 15; a blind hole is arranged on the outer periphery of the coupling sleeve 16, which is conducive to the detachable insertion extension rod for rapid rotation.

[0079] Furthermore, a disc scale (not shown in the figure) is arranged on the end of the rotating shaft 14 away from the actuator, and a pointer (not shown in the figure) is arranged on the inner shaft 15 near the disc scale.

[0080] When measuring the inner diameter of the pipe 11, the centering assembly is first installed inside the pipe 11, and the lifting plate 55 and the measuring component 47 are moved to the outside of the first sleeve 12 by rotating the inner shaft 15, and the inner shaft 15 is further rotated to make the measuring component 47 contact the inner wall of the pipe 11; when the roller 62 of the measuring component 47 contacts the inner wall of the pipe 11 to form an extrusion, the guide block 63 and the detection block 66 are driven to move, and data is obtained through the distance sensor 67;

[0081] According to the preset conversion relationship between the number of rotations and angles of the inner shaft 15 and the distance moved by the measuring unit, the number of rotations of the inner shaft 15 is converted into the distance from the measuring component to the center, and then the data obtained by the distance sensor 67 on the measuring component 47 are integrated to obtain the inner diameter value. It is convenient and efficient to read the value at the measuring target without taking the reading.

[0082] The method for measuring the inner diameter of a pipeline using the pipeline inner diameter measuring device comprises the following steps:

[0083] S1: Initial installation: fix the actuator to the end of the rotating shaft 14, move the actuator to the target A in the pipe 11, and install the centering assembly inside the opening of the pipe 11, wherein the pipe wall inside the opening of the pipe 11 has been rust-removed in advance;

[0084] S2: Centering and fixing: The double ring sleeve structure composed of the first ring sleeve 23, the second ring sleeve 25, the threaded sleeve and the nut cooperates with the power component to fix the centering component on the inner wall of the pipe 11 to ensure the stability of the measurement reference;

[0085] S3: Function switching and measurement: After removing the double-ring structure, the thrust sleeve 22 and the adjusting sleeve 28, start the power assembly to drive the rotating shaft 14 and the actuator to rotate, and drive the rust removal assembly to remove rust from the inside of the pipeline; after the rust removal is completed, the rust removal unit 41 is retracted into the inside of the actuator by adjusting the rotation of the inner shaft 15, and the measuring unit 40 is driven to extend, and the inner diameter of the pipeline at the target A is measured and data is obtained;

[0086] S4: Position transfer: After completing the measurement at target A, disassemble the detection device, move the actuator to the next measurement position target B, and install the centering assembly at the target A where the measurement has been completed, and use the previous measurement point as the new centering support position;

[0087] S5: Repeat measurement: Repeat the operations of steps S2 to S3 at the target B to complete the rust removal and measurement work at the target B;

[0088] S6: Progressive deepening: When it is necessary to measure deeper into the pipeline, repeat steps S4 to S5 to gradually complete the measurement work at different depths, where each position that has been measured can be used as the centering support for the next measurement point.

[0089] The present invention illustrates the technical concept of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that the relevant improvements to the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A device for measuring the inner diameter of a pipeline, comprising a coupling sleeve (16) and a hollow rotating shaft (14) installed in a pipeline (11), wherein an inner shaft (15) is installed inside the rotating shaft (14) via a bearing, and characterized in that: An actuator assembly is fixedly arranged at the end of the rotating shaft (14), the actuator assembly comprising a first sleeve (12), a solid body is arranged inside the first sleeve (12) to form a slot body, the slot body comprising a central slot and a guide slot, the inner shaft (15) extends into the central slot and a guide plate (38) is screwed and mounted at the end thereof, a third wedge (39) is arranged in an array on the periphery of the guide plate (38), the third wedges (39) are all located in the guide slots, a measuring unit (40) is abutted against the third wedges (39), a rust removal unit (41) is arranged at one end of the guide slot away from the center, the rust removal unit (41) penetrates the side wall of the first sleeve (12) and extends to the outside; the ends of the rotating shaft (14) and the inner shaft (15) away from the first sleeve (12) are connected by a coupling The invention relates to a rotary shaft (14) and a rotary shaft (14) connected to the shaft sleeve (16); a power assembly is arranged on the rotary shaft (14) near the coupling sleeve (16); when the power assembly is started, the first sleeve (12) is driven to rotate so that the rust removal unit cleans the inner wall of the pipeline; when the inner shaft (15) is adjusted to rotate, the measuring unit and the rust removal unit are switched in position to achieve the measurement of the inner diameter of the pipeline; and the centralizing assembly also includes a second sleeve (13) and a wedge-shaped push plate; the second sleeve (13) is mounted on the rotary shaft (14) through the shaft sleeve (31); three T-slots (32) are arranged in an array on the body of the second sleeve (13); the T-slots (32) are connected in the radial direction and the circumferential direction; a second wedge (33) is radially mounted in the T-slot (32); the second wedge (33) is connected through the first sleeve (31) and the second wedge (33) is connected through the second sleeve (31) and the second wedge (33) is connected through the second sleeve (31) and the second sleeve (1 ... A spring (34) is connected to the second sleeve (13); the wedge-shaped push plate comprises a ring body (20), three first wedges (21) are fixedly arranged on the ring body (20), the first wedges (21) are all installed in the axial direction of the T-shaped slot (32), one end of the ring body (20) away from the first wedges (21) is connected to the thrust sleeve (22), and the other end of the thrust sleeve (22) abuts against the thrust assembly; when the thrust assembly drives the thrust sleeve (22) to approach the second sleeve (13), the first wedge (21) and the second wedge (33) are inclined and abutted and displaced, so that the second wedge (33) moves toward the inner wall of the pipe (11); the thrust assembly comprises a threaded sleeve, a nut (29), an adjusting sleeve (28) and a coaxially fixed A first ring sleeve (23) and a second ring sleeve (25), wherein the outer periphery of the first ring sleeve (23) is detachably connected to the pipe (11) via a screw rod (24), a threaded sleeve is fixedly installed inside the second ring sleeve (25), and the threaded sleeve is sleeved on the rotating shaft (14), the threaded sleeve comprises an oblique threaded body (27) and a flat threaded body (26) which are fixedly connected, the flat threaded body (26) being located on a side close to the first ring sleeve (23), the oblique threaded body (27) and a nut (29) being screwed together to be fixedly connected to the rotating shaft (14), and the adjusting sleeve (28) being screwed together with the flat threaded body (26); a retaining ring (30) is arranged on a side of the second sleeve (13) away from the thrust assembly, and the retaining ring (30) is detachably installed on the rotating shaft (14).

2. The pipeline inner diameter measuring device according to claim 1, characterized in that: The rust removal unit (41) comprises a lifting plate (55) and two guide rails (48) symmetrically fixed inside the first sleeve (12); a guide rod (49) is slidably installed inside the guide rail (48); two ends of the guide rod (49) are respectively hinged to the bottom end of the lifting plate (55) through connecting rods (50); the connecting rods (50) opposite to each other on both sides are connected by a cross bar (51); an outer sleeve rod (52) is vertically fixed on the cross bar (51); an inner sleeve rod (53) is sleeved inside the outer sleeve rod (52); a second spring (54) is sleeved on the inner sleeve rod (53); the lifting plate (55) passes through the side wall of the first sleeve (12) and extends to the outside; a brush wire (56) is fixed at the top end of the first sleeve (12).

3. The pipeline inner diameter measuring device according to claim 2, characterized in that: The measuring unit (40) comprises a connecting block (43) and a fourth wedge (42), wherein the fourth wedge (42) is slidably mounted inside the guide groove, the fourth wedge (42) is arranged to abut against the inclined surface of the third wedge (39), a measuring component (47) is fixedly arranged on a side of the fourth wedge (42) close to the pipeline (11), a limiting groove and a reset groove (44) are provided on the fourth wedge (42) close to the outer side of the solid body, a reset spring (60) is arranged in the reset groove (44), one end of the reset spring (60) is fixedly connected to an end of the reset groove (44) away from the center, and the other end of the reset spring (60) is fixedly arranged on the connecting block (43), and the connecting block (43) extends out of the fourth wedge The outer body (42) is fixedly connected to the solid body of the first sleeve (12); the limiting groove is a T-shaped structure; a T-shaped limiting body is arranged on the solid body corresponding to the limiting groove; the T-shaped limiting body is slidably installed in the limiting groove; a connecting rod (46) is hingedly connected to the side of the outer sleeve rod (52) close to the fourth wedge (42); a bayonet (45) is provided on the side of the fourth wedge (42) close to the connecting rod (46); an end of the connecting rod (46) is detachably connected to the bayonet (45); a third spring (58) is arranged on the side of the connecting rod (46) close to the rust removal unit (41); and a limiting column (59) is fixedly arranged between the rust removal unit (41) and the measuring unit (40).

4. The pipeline inner diameter measuring device according to claim 3, characterized in that: The measuring component (47) comprises two symmetrically arranged support blocks (61), wherein opposite sides of the support blocks (61) are provided with slide grooves, a guide rod (64) is fixedly arranged inside the slide groove, a guide block (63) and a fourth spring (65) are sleeved on the guide rod (64), and a roller (62) is installed between the guide blocks (63) on both sides; a detection block (66) is arranged at the bottom of the guide block (63), and a distance sensor (67) is arranged at the bottom of the slide groove.

5. The pipeline inner diameter measuring device according to claim 1, characterized in that: The power assembly comprises a motor (17), an output gear (18) is mounted on the output end of the motor (17), the output gear (18) meshes with a transmission gear (19), a keyway is provided on the rotating shaft (14), and the transmission gear (19) is detachably mounted on the rotating shaft (14) by means of the keyway.

6. The pipeline inner diameter measuring device according to claim 1, characterized in that: The coupling sleeve (16) is a stepped sleeve structure, a spline groove is arranged inside the coupling sleeve (16), and splines are arranged at the ends of the rotating shaft (14) and the inner shaft (15).

7. The pipeline inner diameter measuring device according to claim 1, characterized in that: A disc scale is arranged on the end of the rotating shaft (14) away from the actuator assembly, and a pointer is arranged on the inner shaft (15) near the disc scale.

8. A method for measuring using the pipeline inner diameter measuring device according to any one of claims 3 to 7, characterized in that: The following steps are involved: S1: Initial installation: fix the actuator assembly to the end of the rotating shaft (14), move the actuator assembly to the target A in the pipe (11), and install the centering assembly inside the opening of the pipe (11), wherein the pipe wall inside the opening of the pipe (11) has been previously derusted; S2: Centering and fixing: The double ring sleeve structure composed of the first ring sleeve (23), the second ring sleeve (25), the threaded sleeve and the nut cooperates with the power component to fix the centering component on the inner wall of the pipe (11) to ensure the stability of the measurement reference; S3: Function switching and measurement: After removing the double ring structure, the power assembly is started to drive the rotating shaft (14) and the actuator assembly to rotate, thereby driving the rust removal assembly to remove rust from the inside of the pipeline; after the rust removal is completed, the rust removal unit (41) is retracted into the inside of the actuator assembly by adjusting the rotation of the inner shaft (15), and the measuring unit (40) is driven to extend, so as to measure the inner diameter of the pipeline at the target A and obtain data; S4: Position transfer: After completing the measurement at target A, disassemble the detection device, move the actuator to the next measurement position target B, and install the centering assembly at the target A where the measurement has been completed, and use the previous measurement point as the new centering support position; S5: Repeat measurement: Repeat the operations of steps S2 to S3 at the target B to complete the rust removal and measurement work at the target B; S6: Progressive deepening: When it is necessary to measure deeper into the pipeline, repeat steps S4 to S5 to gradually complete the measurement work at different depths, where each position that has been measured can be used as the centering support for the next measurement point.

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