In-pipeline tensioning device for calibrating pipeline devices

Abstract

The invention relates to an in-pipeline tensioning device for calibrating pipeline devices, which is characterized in that a base is integrally cylindrical, and a central through hole is formed in the base; three radial through grooves are uniformly distributed on the periphery of the central through hole; the two bearing seats are fixed at two ends of the base and are internally provided with bearings; the lead screw and the nut are meshed to form a lead screw nut transmission mechanism which is installed in a center through hole of the base, and the two ends of the lead screw are in interference fit with bearings in the bearing seats at the two ends. The nut is matched with the circular motion limiting structure; the positions, corresponding to the three radial through grooves in the base, of the outer side of the nut are each provided with an inclined sliding groove. The three sliding blocks are embedded in the three radial through grooves in the mode that the three sliding blocks can move in the radial direction of the base, inclined sliding faces are arranged on the inner sides of the three sliding blocks, and the inclined sliding faces are in contact fit with the corresponding inclined sliding grooves. The three tensioning action blocks are fixedly installed above the three sliding blocks respectively, and the upper portions of the tensioning action blocks extend outwards to be provided with tensioning action heads. The three tensioning action heads make contact with the inner wall of the pipeline, and efficient establishment of the pipeline axis can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline device calibration, and particularly relates to an in-pipe tensioning device for calibrating pipeline devices. Background Art

[0002] Pipeline devices are common components in equipment. Due to the need to maintain a certain level of operational accuracy, the pipeline devices of these devices need to be calibrated regularly to avoid operational errors. During the calibration process, it is usually necessary to use surveying instruments to measure the axial orientation information of the pipeline in the equipment, compare the measured orientation information with the orientation information recorded in the equipment, and derive the error and then perform error calibration. In this process, how to efficiently and accurately establish the axial orientation information of the pipeline becomes a key process. Due to the characteristics of the hollow structure and small inner diameter of pipeline devices, its axial orientation information is not convenient to measure directly or place it in a measuring device for measurement. Therefore, it is particularly important to design an auxiliary measurement device that can efficiently and accurately establish the axis information in the pipeline. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention proposes an in-pipe tensioning device for calibrating pipeline devices, which can efficiently and accurately establish axis information in the pipeline.

[0004] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0005] A pipeline tensioning device for calibrating pipeline devices, comprising a base, a lead screw, a nut, a slider, a tensioning block, and two bearing seats;

[0006] The base is cylindrical in shape as a whole and is provided with a central through hole; three radial through grooves are evenly distributed along the circumferential direction on the periphery of the central through hole on the base;

[0007] The two bearing seats are fixed at both ends of the base, and bearings are installed in the center holes of the two bearing seats; the screw and the nut are meshed through a trapezoidal thread to form a screw-nut transmission mechanism, and the screw-nut transmission mechanism is installed in the central through hole of the base, and the two ends of the screw are interference fit with the bearings in the bearing seats at both ends and are limited axially; the nut cooperates with the circular motion limiting structure; the outer side of the nut is provided with an inclined groove corresponding to the position of the three radial through grooves on the base; the three sliders are respectively embedded in the three radial through grooves in a manner that they can move radially along the base, and the inner sides of the three sliders are provided with inclined sliding surfaces, which contact and cooperate with the corresponding inclined sliding grooves; the three tensioning blocks are respectively fixedly installed above the three sliders, and a tensioning head is provided on the outer side of the upper part of the tensioning block, and the shape of the tensioning head is an arc.

[0008] Furthermore, the circular motion limiting structure includes a first limiting plate, a second limiting plate, and three limiting rods; the first limiting plate is evenly distributed along the circumferential direction with three clearance slots, and rod insertion holes are provided between adjacent clearance slots; the second limiting plate is evenly distributed along the circumferential direction with three rod insertion holes, which are threaded holes; a first limiting truncated cone and a second limiting truncated cone are coaxially provided at both ends of the central through hole of the base; the first limiting plate and the second limiting plate are fixed in the first limiting truncated cone and the second limiting truncated cone, respectively; one end of each of the three limiting rods is provided with a rod neck, the diameter of the rod neck being smaller than the diameter of the main part of the limiting rod. The three limiting rods are inserted and positioned with the three rod insertion holes on the first limiting plate through the rod necks, and the other ends of the three limiting rods are respectively inserted into the rod insertion holes on the second limiting plate. The rod insertion holes on the second limiting plate are provided with locking screws that compress the ends of the limiting rods to achieve axial fixation of the limiting rods.

[0009] Moreover, radial guide grooves are provided in the middle of both sides of each radial through groove on the base; guide rails are provided on both sides of the three sliders; the guide rails on both sides of the sliders form a guiding fit with the radial guide grooves on both sides of the corresponding radial through grooves.

[0010] Moreover, a threaded hole is provided at the upper end of the slider, and inclined surfaces are symmetrically provided on both sides of the threaded hole, the inclined surfaces on both sides constitute a V-shaped positioning surface, and the inner ends of the V-shaped positioning surfaces are connected to the positioning vertical surfaces; screw through holes that match the threaded holes on the slider are provided on the tensioning block, and a V-shaped positioning groove that matches the V-shaped positioning surface on the slider is provided on the lower part of the tensioning block; the three tensioning blocks are respectively fixed to the upper ends of the three sliders by screws, and the V-shaped positioning grooves on the tensioning blocks form a positioning match with the V-shaped positioning surface on the slider, and radial limitation is formed by the positioning vertical surfaces on the slider.

[0011] The advantages and positive effects of the present invention are:

[0012] 1. The pipeline tensioning device of the present invention has the advantages of compact structure and strong adaptability. When the present invention is applied to the calibration work of pipeline devices, the pipeline axis can be efficiently established. In conjunction with measuring instruments, the orientation information can be measured, which effectively improves the working efficiency.

[0013] 2. The screw and nut of the tensioning drive mechanism in the pipeline tensioning device of the present invention are matched with each other through trapezoidal threads, which have a self-locking characteristic. This can ensure a stable and secure installation of the tensioner in the pipeline, preventing loosening during surveying and mapping operations, which could affect measurement accuracy.

[0014] 3. The pipeline tensioning device of the present invention can be used as a module and connected through a connecting frame, a connecting rod, an extension frame, and a driving rod to achieve the purpose of multi-module coordination and synchronous operation, thereby increasing the stability of the pipeline tensioning installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall appearance of the present invention Figure I

[0016] Figure 2 This is a schematic diagram of the overall appearance of the present invention Figure II

[0017] Figure 3 It is a top view of the present invention

[0018] Figure 4 yes Figure 3 AA section position plan view;

[0019] Figure 5 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 6 It is a top view of the cooperation between the nut with an outer conical surface and the radial slider of the present invention;

[0021] Figure 7 yes Figure 6 BB section position plan;

[0022] Figure 8 A three-dimensional diagram of the nut with an outer conical surface and a radial slider according to the present invention;

[0023] Figure 9 This is a schematic structural diagram of the base of the present invention.

[0024] Figure 10 10a is a side view of the pipeline tensioning device of the present invention in a contracted state within the pipeline, and 10b is a top view;

[0025] Figure 11 11a is a side view of the pipeline tensioning device of the present invention in a stretched state in the pipeline, and 11b is a top view;

[0026] Figure 12 This is a diagram showing an application example of the pipeline tensioning device of the present invention. DETAILED DESCRIPTION

[0027] The structure of the present invention will be further described below with reference to the accompanying drawings and through examples. It should be noted that the present examples are descriptive rather than restrictive.

[0028] An in-pipe tensioning device used for calibrating piping devices, see Figures 1-12 The invention point is: it mainly includes two bearing seats 1, a screw 2, an end cover 3, a tensioning block 4, a base 5, a slider 6, a first limit plate 7, a second limit plate 14, a limit rod 8, a linear bearing 9, a bearing retaining ring 10, a set screw 11, a bearing 12, and a nut 13.

[0029] The base shown is the basic component of the tensioning device in the pipeline, which is used to realize the centralized installation of other gas structural parts. The base is cylindrical as a whole, and a central through hole is provided on the base. A first limiting cone 5.1 and a second limiting cone are coaxially provided at both ends of the central through hole. Three radial through grooves 5.2 are evenly distributed along the circumferential direction on the periphery of the central through hole on the base, and the three radial through grooves are connected to one end of the first limiting cone provided on the base. Radial guide grooves 5.3 are provided in the middle of both sides of each radial through groove. In addition, a weight reduction hole 5.4 is provided on the base at a position between adjacent radial through grooves.

[0030] The screw is the tensioning power input part of the tensioning device in the pipeline, and can adopt a hollow screw structure. A connecting port is set in the middle of both ends of the screw, and axial holes along the radial direction of the screw are correspondingly set on both sides of the connecting port.

[0031] The nut is used to engage with the screw thread to form a screw-nut transmission mechanism. In the present invention, the nut and the screw are preferably engaged by a trapezoidal thread, which can achieve good self-locking performance and has the advantages of good transmission stability and high precision. Three inclined grooves 13.1 are evenly distributed along the circumferential direction on the outer side of the nut. Three axial guide holes parallel to the central axis of the nut are evenly distributed along the circumferential direction on the nut. A linear bearing is installed in each axial guide hole. One end of the linear bearing is positioned and matched with a shoulder provided in the axial guide hole. A bearing retaining ring is fastened and installed on the outside of the other end of the linear bearing in the axial guide hole to limit the other end of the linear bearing.

[0032] The limiting rod is used to restrict the rotation of the nut along the circumferential direction. In the present invention, there are three limiting rods. A rod neck is provided at one end of the limiting rod, and the diameter of the rod neck is smaller than the diameter of the main body of the limiting rod.

[0033] The first and second limiting plates cooperate to achieve axial limiting of the limiting rod. The first limiting plate is provided with three circumferentially spaced clearance notches for accommodating the three tensioning blocks, with rod insertion holes positioned between adjacent clearance notches. The second limiting plate is also provided with three circumferentially spaced threaded rod insertion holes. These three limiting rods, the first limiting plate, and the second limiting plate constitute a circular motion limiting structure.

[0034] The sliders are used to convert the nut's axial movement into radial movement. In the present invention, three identical sliders are included. A beveled edge 6.1 is provided on the inner side of each slider, and guide rails 6.3 are provided on either side of the sliders. Furthermore, a threaded hole is provided at the top end of the slider, and symmetrically disposed beveled surfaces are provided on either side of the threaded hole. These two beveled surfaces form a V-shaped positioning surface 6.2, the inner end of which is connected to a positioning vertical surface.

[0035] The tensioning block is used to release tension from the inner wall of the pipe. It is equipped with screw holes that mate with the threaded holes on the slider, preferably countersunk holes. A V-shaped positioning groove is provided at the bottom of the tensioning block, matching the V-shaped positioning surface on the slider. A tensioning head, shaped like an arc, extends outward from the top of the tensioning block.

[0036] The first limiting plate is fixedly mounted on the first limiting cone on the base by screws, and the second limiting plate is fixedly mounted on the second limiting cone on the base by screws. Two bearing seats are fixedly mounted on the two ends of the base by screws, and bearings are installed in the center holes of the two bearing seats. The screw and nut transmission mechanism is installed in the central through hole of the base, and the two ends of the screw are interference fit with the bearings in the bearing seats at both ends and are axially limited. A limiting rod passing through a linear bearing is installed in each axial guide through hole of the nut. The neck of the limiting rod forms an insert-and-position fit with the corresponding rod socket on the first limiting plate, and the other end of the limiting rod is insert-and-fit with the corresponding rod socket on the second limiting plate, and a locking screw for tightening the limiting rod is installed in the rod socket on the second limiting plate to achieve axial fixation of the limiting rod.

[0037] The three sliders are embedded in three radial slots on the base, with the guide rails on either side of the sliders aligning with the radial guide grooves on either side of the corresponding radial slots. The three tensioning blocks are fixed to the upper ends of the three sliders with screws. The V-shaped positioning grooves on the tensioning blocks align with the V-shaped positioning surfaces on the sliders, and the positioning surfaces on the sliders provide radial positioning limits.

[0038] The working principle of the pipeline tensioning device used for calibration of pipeline devices is as follows:

[0039] When external torque acts on the screw 2, the rotational movement of the screw 2 can drive the nut 13 to perform linear displacement movement, and the limit rod 8 can ensure the stability of the linear displacement movement of the nut 13; the slider 6 and the nut 13 are matched through the inclined surface, and the nut 13 can drive the slider to move radially. The slider 6 is installed in the radial through groove on the base 5, and the slider 6 can slide in the radial through groove on the base 5. The process is as follows: the slider 6 has an oblique sliding edge structure, and the nut 13 has three evenly distributed oblique sliding groove structures. The oblique sliding edge structure of the slider 6 can cooperate with the oblique sliding groove of the nut 13 The slider 6 has guide rail structures on both sides, and the base 5 has three evenly distributed radial guide groove structures. The straight sliding edge structure of the slider 6 can cooperate with the corresponding radial guide groove of the base 5. When external torque acts on the screw 2, the screw 2 rotates, thereby driving the nut 13 to perform linear displacement movement. The linear displacement movement of the nut 13 can simultaneously drive the three sliders 6 to slide in the radial through grooves of the base 5, thereby simultaneously driving the three tensioning blocks to perform radial telescopic movement. When the tensioning heads of the three tensioning blocks are in tight contact with the inner wall of the pipeline, the device is tightened on the pipeline. The axial orientation information of the pipeline can be obtained through this device, and the axial orientation information of the pipeline in the equipment can be measured in conjunction with surveying and mapping instruments.

[0040] Example:

[0041] Referring to Appendix 12 , the pipe tensioning device of the present invention is connected via a connecting frame 16 , a connecting rod 17 , an extension frame 18 , and a driving rod 19 to form a new device. This device is then placed in a pipe 15 to be measured. An external force rotates the driving rod, transmitting the rotational torque through the connecting rod to the lead screw, which drives the nut 13 to perform linear motion. This linear motion of the nut 13 drives the three sliders 6 to slide within the linear grooves of the base 5 , which in turn drives the three support blocks 4 to slide. The support blocks contact the inner wall of the pipe, achieving the purpose of expansion and tension. Reversing the driving rod rotation achieves contraction.

[0042] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A pipeline tensioning device for calibrating pipeline devices, characterized by: It includes a base, a lead screw, a nut, a slider, a tensioning block, and two bearing seats; The base is cylindrical in shape as a whole and is provided with a central through hole; three radial through grooves are evenly distributed along the circumferential direction on the periphery of the central through hole on the base; The two bearing seats are fixed at both ends of the base, and bearings are installed in the center holes of the two bearing seats; the screw and the nut are meshed through a trapezoidal thread to form a screw-nut transmission mechanism, and the screw-nut transmission mechanism is installed in the central through hole of the base, and the two ends of the screw are interference fit with the bearings in the bearing seats at both ends and are limited axially; the nut cooperates with the circular motion limiting structure; the outer side of the nut is provided with an inclined groove corresponding to the position of the three radial through grooves on the base; the three sliders are respectively embedded in the three radial through grooves in a manner that they can move radially along the base, and the inner sides of the three sliders are provided with inclined sliding surfaces, which contact and cooperate with the corresponding inclined sliding grooves; the three tensioning blocks are respectively fixedly installed above the three sliders, and a tensioning head is provided on the outer side of the upper part of the tensioning block, and the shape of the tensioning head is an arc.

2. The in-pipe tensioning device for calibrating pipeline devices according to claim 1, characterized in that: The circular motion limiting structure includes a first limiting plate, a second limiting plate and three limiting rods; three give way slots are evenly distributed on the first limiting plate in the circumferential direction, and rod insertion holes are provided between adjacent give way slots; three rod insertion holes are evenly distributed on the second limiting plate in the circumferential direction, and the three rod insertion holes are threaded holes; a first limiting table and a second limiting table are coaxially arranged at both ends of the central through hole of the base; the first limiting plate and the second limiting plate are respectively fixed in the first limiting table and the second limiting table; one end of the three limiting rods is provided with a rod neck, and the diameter of the rod neck is smaller than the diameter of the main part of the limiting rod; the three limiting rods are inserted and positioned with the three rod insertion holes on the first limiting plate through the rod neck, and the other ends of the three limiting rods are respectively inserted into the rod insertion holes on the second limiting plate, and a locking screw is installed in the rod insertion hole on the second limiting plate to compress the end of the limiting rod to realize axial fixation of the limiting rod.

3. The in-pipe tensioning device for calibrating pipeline devices according to claim 1, characterized in that: Radial guide grooves are provided in the middle of both sides of each radial through groove on the base; guide rails are provided on both sides of the three sliders; the guide rails on both sides of the sliders form a guiding fit with the radial guide grooves on both sides of the corresponding radial through grooves.

4. The in-pipe tensioning device for calibrating pipeline devices according to claim 1, characterized in that: A threaded hole is provided at the upper end of the slider, and inclined surfaces are symmetrically provided on both sides of the threaded hole, the inclined surfaces on both sides constitute a V-shaped positioning surface, and the inner ends of the V-shaped positioning surfaces are connected to the positioning vertical surfaces; screw through holes that match the threaded holes on the slider are provided on the tensioning block, and a V-shaped positioning groove that matches the V-shaped positioning surface on the slider is provided on the lower part of the tensioning block; the three tensioning blocks are respectively fixed to the upper ends of the three sliders by screws, and the V-shaped positioning grooves on the tensioning blocks form a positioning match with the V-shaped positioning surface on the slider, and radial limitation is formed by the positioning vertical surfaces on the slider.

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