Umbrella-shaped leather cup bidirectional walking pipe cleaner

Abstract

The invention relates to the technical field of pipe cleaners, in particular to an umbrella-shaped leather cup bidirectional walking pipe cleaner which comprises a pipe cleaner framework, an umbrella-shaped leather cup assembly, a power unit and a driving unit. The two umbrella-shaped leather cup assemblies are symmetrically arranged at the front end and the rear end of the pipe cleaner framework. The umbrella-shaped leather cup assembly comprises a leather cup flexible body, a supporting connecting rod and a telescopic connecting rod, the supporting connecting rod is connected with the leather cup flexible body, one end of the telescopic connecting rod is hinged to the supporting connecting rod, and the other end of the telescopic connecting rod is connected with the power unit. The power unit comprises a servo motor, a coupler and a lead screw module, and the servo motor is connected with the lead screw module through the coupler; the driving unit comprises a motor control panel and a pressure sensor; the two pressure sensors are arranged at the front end and the rear end of the pipe cleaner framework respectively. The motor control panel is electrically connected with the pressure sensor and the servo motor so as to control the servo motor to rotate forwards or backwards according to the pressure difference, then the umbrella-shaped leather cup assembly is driven to be unfolded or folded, and the problem that the trafficability of the pipe cleaner is poor is solved.

Description

Technical Field

[0001] This application relates to the technical field of pigging devices, and particularly to an umbrella-shaped leather cup two-way walking pigging device. Background Art

[0002] In pipeline cleaning operations, the pigging device needs to complete the task of removing impurities in pipelines with complex orientations. Its running direction control ability and sealing adaptability directly affect the operation safety and efficiency. Especially in long-distance, multi-bend or low-pressure working conditions, the pigging device not only needs to have the ability to walk in both directions to cope with sudden jams, but also needs to dynamically adjust the sealing performance to adapt to different medium pressure conditions. This poses dual requirements of two-way controllable deformation and sealing self-adaptation for the design of the power leather cup structure.

[0003] There are mainly two implementation methods for the power leather cup structure: one is to use a butterfly-shaped leather cup as a unidirectional power source, and form a pressure difference through interference fit to drive unidirectional movement. Its unidirectional force-bearing characteristic results in the inability to reverse and escape when jammed; the other is to use a symmetric straight plate structure to achieve the ability to walk in both directions, but the straight plate has limited deformation and insufficient sealing surface stability. An excessive interference amount is likely to increase the running resistance, while an insufficient interference amount leads to an increased leakage flow rate. Especially at pipeline bends, secondary jams are likely to occur due to seal failure.

[0004] The above two types of structures have common technical limitations: the unidirectional driving characteristic of the butterfly-shaped leather cup and the uncontrollable sealing of the straight plate structure cannot simultaneously meet the coordinated requirements of two-way walking and pressure self-adaptation. The former is limited by the unidirectional sealing mechanism, resulting in the lack of escape ability, and the latter is difficult to balance the sealing performance and running resistance due to insufficient deformation adjustment ability. Especially in low-flow working conditions, it is impossible to maintain effective thrust by dynamically adjusting the interference amount, which has become the core technical bottleneck restricting the reliable operation of the pigging device in complex pipeline environments. Summary of the Invention

[0005] This application provides an umbrella-shaped leather cup two-way walking pigging device to solve the problem of poor passability of the pigging device.

[0006] This application provides an umbrella-shaped leather cup two-way walking pigging device, including: a pigging device skeleton, an umbrella-shaped leather cup assembly, a power unit, and a driving unit; Two groups of the umbrella-shaped leather cup assemblies are symmetrically arranged at the front and rear ends of the pigging device skeleton; The umbrella-shaped leather cup assembly includes a leather cup flexible body, a support connecting rod, and a telescopic connecting rod. The support connecting rod is connected to the leather cup flexible body. One end of the telescopic connecting rod is hinged to the support connecting rod, and the other end of the telescopic connecting rod is connected to the power unit; The power unit includes a servo motor, a coupling, and a lead screw module. The servo motor is connected to the lead screw module through the coupling; The driving unit includes a motor control board and a pressure sensor; Two of the pressure sensors are respectively arranged at the front and rear ends of the pigging tool framework for detecting the pressure difference before and after the pigging tool. The motor control board is electrically connected to the pressure sensor and the servo motor to control the forward or reverse rotation of the servo motor according to the pressure difference, and then drive the expansion or contraction of the umbrella-shaped leather bowl assembly.

[0007] The umbrella-shaped leather bowl two-way pigging tool, through two groups of symmetrically arranged umbrella-shaped leather bowl assemblies and a power unit composed of a servo motor, a coupling and a lead screw module, cooperates with the pressure sensor to detect the front and rear pressure differences and is controlled by the motor control board to expand or contract the umbrella-shaped leather bowl assembly, thereby increasing the interference fit between the umbrella-shaped leather bowl assembly and the pipeline to improve the sealing performance, enabling the pigging tool to have better passability. And it can flexibly adjust the movement direction according to the pressure change in the pipeline, adapt to the special pipeline conditions of low flow rate and low pressure, thereby improving the two-way walking ability of the pigging tool in the pipeline to solve the problem of poor passability of the pigging tool.

[0008] Optionally, the pigging tool framework includes a straight plate, a cabin body, end covers and flanges. The two end covers are respectively arranged at both ends of the cabin body to form a pressure sealing cabin for accommodating the power unit and the driving unit. The straight plate and the flanges are symmetrically arranged on both sides of the cabin body. The outer edge of the straight plate abuts against the inner wall of the pipeline for scraping impurities on the inner wall of the pipeline; the flanges are used to fix the straight plate and the umbrella-shaped leather bowl assembly.

[0009] The pigging tool framework forms a pressure sealing cabin through the cooperation of the end covers and the cabin body to protect the internal power unit and driving unit. At the same time, by using the symmetrically arranged straight plate and flanges, the outer edge of the straight plate contacts the inner wall of the pipeline, which helps to scrape impurities on the inner wall of the pipeline and improve the pigging effect. The flanges enhance the fixing stability of the straight plate and the umbrella-shaped leather bowl assembly, reducing the risk of component loosening caused by vibration or pressure change.

[0010] Optionally, the umbrella-shaped leather bowl assembly further includes a leather bowl pressing plate and a connecting rod pin shaft. The leather bowl pressing plate sequentially connects the leather bowl flexible body and the supporting connecting rod for fixing the leather bowl flexible body and the supporting connecting rod; the connecting rod pin shaft is used for hinging the supporting connecting rod and the telescopic connecting rod.

[0011] The umbrella-shaped leather bowl assembly connects the leather bowl flexible body and the supporting connecting rod through the leather bowl pressing plate, enhancing the fixing stability of the leather bowl flexible body and reducing the risk of deformation caused by fluid impact. At the same time, by using the connecting rod pin shaft to hinge the supporting connecting rod and the telescopic connecting rod, the movement flexibility of the umbrella-shaped leather bowl assembly is improved, enabling it to expand or contract more smoothly in the pipeline.

[0012] Optionally, the power unit further includes a connecting rod mounting seat; the lead screw module includes a lead screw and a lead screw nut. One end of the power end of the servo motor is connected to one end of the lead screw. The lead screw nut is sleeved on the lead screw. One end of the telescopic connecting rod far from the supporting connecting rod is hinged to the connecting rod mounting seat, and the connecting rod mounting seat is fixedly connected to the lead screw nut.

[0013] The power unit cooperates with the servo motor through the lead screw module, so that the movement of the lead screw nut on the lead screw drives the connecting rod mounting seat to move, and then controls the expansion or contraction of the umbrella-shaped leather cup assembly through the hinged telescopic connecting rod, improving the accuracy of power transmission; the fixed connection method between the connecting rod mounting seat and the lead screw nut enhances the structural stability, reduces the vibration influence during the movement, and improves the operation reliability of the pig in the pipeline.

[0014] Optionally, the lead screw module further includes a lead screw support seat and a lead screw fixing seat; The lead screw is sleeved on the lead screw support seat, one end of the lead screw far from the servo motor is inserted into the lead screw fixing seat, and both the lead screw support seat and the lead screw fixing seat are fixedly connected to the pig skeleton.

[0015] The double-fixed structure of the lead screw module through the lead screw support seat and the lead screw fixing seat enables the lead screw to maintain stable centering during operation, reducing the yaw phenomenon of the lead screw caused by cantilever loading; the socketing fit between the lead screw support seat and the lead screw and the insertion structure of the lead screw fixing seat can disperse the radial load during the rotation of the lead screw, reduce the frictional resistance during the movement of the lead screw nut, thereby improving the power transmission efficiency and extending the service life of the lead screw module.

[0016] Optionally, the drive unit further includes a limit sensor; The motor control board is electrically connected to the limit sensor through a wire. When the lead screw nut moves along the lead screw to the preset maximum stroke, the end of the lead screw nut contacts the limit sensor to trigger the motor control board to turn off the servo motor.

[0017] The limit sensor is electrically connected to the motor control board through a wire and automatically triggers shutdown protection when the lead screw nut moves to the preset maximum stroke, which can prevent the lead screw module from over-running and reduce the risk of overload damage to the mechanical structure; the limit sensor helps to maintain the umbrella-shaped leather cup assembly working within a safe stroke range and improves the stability and reliability of the pig operation.

[0018] Optionally, the leather cup flexible body is of an umbrella shape, and a plurality of folds are evenly arranged along the circumference of the leather cup flexible body. The support connecting rod is arranged on both sides of the fold of the leather cup flexible body and is used to support the expansion or contraction of the leather cup flexible body.

[0019] The leather cup flexible body adopts an umbrella-shaped structure and is evenly provided with multiple folds along the circumference. In cooperation with the arrangement of the support connecting rods on both sides of the folds, it can improve the radial deformation ability of the leather cup flexible body, making it fit the inner wall of the pipeline better; the setting of the support connecting rods helps to maintain the structural stability of the leather cup flexible body, reduce local stress concentration during the unfolding or contraction process, and thus improve the adaptability and sealing effect of the pigging operation.

[0020] Optionally, both the straight plate and the leather cup flexible body are made of polyurethane material.

[0021] The straight plate and the leather cup flexible body made of polyurethane material can take into account both the structural strength and the elastic deformation ability, enabling the straight plate to maintain appropriate rigidity when scraping impurities in the pipeline, and at the same time enabling the leather cup flexible body to maintain good resilience when unfolding and contracting; this material selection helps to reduce the friction loss between the components and the inner wall of the pipeline, extend the service life of the key components of the pig, and improve its adaptability in complex pipeline environments.

[0022] Optionally, the drive unit further includes a battery embedded inside the pig skeleton cabin, and the battery is electrically connected to the motor control board, the pressure sensor, the limit sensor, and the servo motor respectively through a power supply line.

[0023] By embedding the battery inside the pig skeleton cabin and providing power to each electrical component through a power supply line, the continuous operation ability of the pig in the pipeline can be maintained; the built-in layout of the battery helps to protect the power supply system from the external environment, reduce the risk of line damage, and at the same time optimize the utilization rate of the internal space of the pig, improving the compactness and reliability of the overall structure.

[0024] Optionally, the pig skeleton further includes a spacer ring; The spacer ring is sleeved on the cabin, and the spacer ring is located between the straight plate and the umbrella-shaped leather cup assembly for isolating the straight plate and the umbrella-shaped leather cup assembly.

[0025] By setting a spacer ring on the cabin and making the spacer ring located between the straight plate and the umbrella-shaped leather cup assembly, the working intervals of the two functional components can be effectively isolated, reducing the interference of the straight plate scraping operation on the umbrella-shaped leather cup assembly; this isolation structure helps to maintain the movement independence of the umbrella-shaped leather cup assembly, reduce the risk of mechanical interference between components, and thus improve the coordination and stability of the overall operation of the pig.

[0026] As can be seen from the above technical solutions, the present application provides an umbrella-shaped leather cup two-way walking pig, which includes: a pig skeleton, an umbrella-shaped leather cup assembly, a power unit and a driving unit; the two umbrella-shaped leather cup assemblies are symmetrically arranged at the front and rear ends of the pig skeleton; the umbrella-shaped leather cup assembly includes a leather cup flexible body, a support link and a telescopic link, the support link is connected to the leather cup flexible body, one end of the telescopic link is hinged to the support link, and the other end of the telescopic link is connected to the power unit; the power unit includes a servo motor, a coupling and a lead screw module, and the servo motor is connected to the lead screw module through the coupling; the driving unit includes a motor control board and a pressure sensor; the two pressure sensors are respectively arranged at the front and rear ends of the pig skeleton for detecting the pressure difference before and after the pig; the motor control board is electrically connected to the pressure sensor and the servo motor to control the forward or reverse rotation of the servo motor according to the pressure difference, and further drive the expansion or contraction of the umbrella-shaped leather cup assembly, so as to solve the problem of poor passability of the pig. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Isometric structural schematic diagram of the umbrella-shaped leather cup two-way walking pig provided by the embodiment of the present application; Figure 2 Front view of the umbrella-shaped leather cup two-way walking pig provided by the embodiment of the present application; Figure 3 Isometric view of the umbrella-shaped leather cup assembly provided by the embodiment of the present application; Figure 4 Main sectional view of the umbrella-shaped leather cup two-way walking pig provided by the embodiment of the present application; Figure 5 Isometric structural schematic diagram of the lead screw module provided by the embodiment of the present application; Figure 6 Schematic diagram of the telescopic state of the umbrella-shaped leather cup when the motor rotates forward provided by the embodiment of the present application; Figure 7 Schematic diagram of the telescopic state of the umbrella-shaped leather cup when the motor rotates reversely provided by the embodiment of the present application; Figure 8 Schematic diagram of the forward state of the umbrella-shaped leather cup two-way walking pig in the pipeline provided by the embodiment of the present application; Figure 9 Schematic diagram of the backward state of the umbrella-shaped leather cup two-way walking pig in the pipeline provided by the embodiment of the present application.

[0029] Illustration: Among them, 1-pipe cleaner skeleton; 101-straight plate; 102-cabin; 103-end cover; 104-flange; 105-spacer ring; 2-umbrella-shaped leather cup assembly; 201-leather cup flexible body; 202-support connecting rod; 203-telescopic connecting rod; 204-leather cup pressure plate; 205-connecting rod pin; 3-power unit; 301-servo motor; 302-coupling; 303-screw module; 303a-screw; 303b-screw nut; 303c-screw support seat; 303d-screw fixing seat; 304-connecting rod mounting seat; 4-drive unit; 401-motor control board; 402-pressure sensor; 403-limit sensor; 404-battery. DETAILED DESCRIPTION

[0030] The embodiments will be described in detail below, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following embodiments do not represent all implementation methods consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application.

[0031] Oil and natural gas have become an indispensable part of our lives. Land long-distance oil and gas pipelines have become the main mode of transportation for oil and natural gas with their high efficiency and low cost. However, pipelines are buried underground all year round, and the oil and gas media they transport contain a large amount of impurities. After years of accumulation, various impurities accumulate in large quantities inside the pipelines, which may even block the pipelines, greatly affecting the transmission efficiency of the pipelines. In addition, the impurities contain a large amount of corrosive substances, which cause irreversible corrosive damage to the pipelines. Therefore, as a pipeline cleaning device, the pig plays an indispensable role in ensuring the cleanliness of the pipeline, improving the transmission efficiency and protecting the health of the pipeline. However, in the actual pigging operation, the pig is often blocked in the pipeline due to deformation of the pipeline or solid impurities that are difficult to remove. If the conventional method of pressurizing the launch end of the pipeline is used, the pig still cannot move forward. Finally, the pig can only be removed by breaking the pipe, which causes huge economic losses. In addition, there are many low-flow, low-pressure long-distance oil and gas pipelines in service today, and there is also a high risk of blocking for pigs with poor sealing.

[0032] In most of the related pigging devices, a butterfly-shaped leather cup with excellent sealing performance is used as the power leather cup. A sealing surface is formed through the interference fit between the butterfly-shaped leather cup and the inner wall of the pipeline, resulting in a pressure difference between the media before and after the pigging device. The pigging device moves forward relying on the pressure difference, and the steel brush carried on the pigging device will scrape off the impurities inside the pipeline to complete the pigging operation. The biggest feature of the butterfly-shaped leather cup is that it can only be stressed unidirectionally, that is, the pigging device using the butterfly-shaped leather cup as the power leather cup can only move unidirectionally. As a result, once the pigging device gets stuck in the pipeline, it cannot be taken out by retreating. There are also a small number of pigging devices that use a straight plate instead of a butterfly-shaped leather cup as the power leather cup. The purpose of this is to make the front and rear structures of the pigging device symmetrical, and theoretically it can also move bidirectionally. However, the deformation amount and sealing performance of the straight plate are not as good as those of the butterfly-shaped leather cup. If the interference amount is too large, the resistance of the pigging device is too large to move forward; if the interference amount is too small, the pigging device will have a large leakage and cannot generate a large thrust. Therefore, the pigging device with only a straight plate has a poor sealing effect in the pipeline. Especially when passing through elbows, the straight plate will cause a large leakage, increasing the risk of the pigging device getting stuck. The above factors result in the unsatisfactory pigging ability and passability of the straight-plate pigging device during actual use.

[0033] To solve the problem of poor passability of the pigging device, refer to Figures 1-9 , an umbrella-shaped leather cup bidirectional walking pigging device is provided in an embodiment of the present application, including: a pigging device skeleton 1, an umbrella-shaped leather cup assembly 2, a power unit 3 and a driving unit 4; two groups of the umbrella-shaped leather cup assemblies 2 are symmetrically arranged at the front and rear ends of the pigging device skeleton 1; the umbrella-shaped leather cup assembly 2 includes a leather cup flexible body 201, a support connecting rod 202 and a telescopic connecting rod 203. The support connecting rod 202 is connected to the leather cup flexible body 201. One end of the telescopic connecting rod 203 is hinged to the support connecting rod 202, and the other end of the telescopic connecting rod 203 is connected to the power unit 3; the power unit 3 includes a servo motor 301, a coupling 302 and a lead screw module 303. The servo motor 301 is connected to the lead screw module 303 through the coupling 302; the driving unit 4 includes a motor control board 401 and a pressure sensor 402; the two pressure sensors 402 are respectively arranged at the front and rear ends of the pigging device skeleton 1 to detect the pressure difference before and after the pigging device; the motor control board 401 is electrically connected to the pressure sensor 402 and the servo motor 301 to control the forward or reverse rotation of the servo motor 301 according to the pressure difference, and then drive the expansion or contraction of the umbrella-shaped leather cup assembly 2.

[0034] It should be understood that the driving unit 4 provides logical action control for the power unit 3. When the umbrella-shaped leather cup assembly 2 extends, the telescopic connecting rod 203 provides an upward unfolding thrust for the supporting connecting rod 202; when the umbrella-shaped leather cup assembly 2 contracts, the telescopic connecting rod 203 provides a downward contracting pulling force for the supporting connecting rod 202. Furthermore, by automatically controlling the umbrella-shaped leather cup assembly 2 through the driving unit 4, expanding the front leather cup flexible body 201 and contracting the rear leather cup flexible body 201, the pig can move forward in the pipeline; contracting the front leather cup flexible body 201 and expanding the rear leather cup flexible body 201 can make the pig move backward in the pipeline. And in order to adapt to the special pipeline conditions of low flow rate and low pressure, by detecting the pressure difference before and after the pig, the opening angle of the umbrella-shaped leather cup assembly 2 is increased, so as to increase the interference amount between the umbrella-shaped leather cup assembly 2 and the pipeline, improve the sealing performance, and make the pig have better passability.

[0035] The two-way walking pig with umbrella-shaped leather cups includes two groups of symmetrically arranged umbrella-shaped leather cup assemblies 2 and a power unit 3 composed of a servo motor 301, a coupling 302 and a lead screw module 303. The pressure sensor 402 is used to detect the pressure difference before and after, and the motor control board 401 controls the expansion or contraction of the umbrella-shaped leather cup assembly 2, so as to increase the interference amount between the umbrella-shaped leather cup assembly 2 and the pipeline, improve the sealing performance, and make the pig have better passability. And it can flexibly adjust the movement direction according to the pressure change in the pipeline, adapt to the special pipeline conditions of low flow rate and low pressure, so as to improve the two-way walking ability of the pig in the pipeline and solve the problem of poor passability of the pig.

[0036] In some embodiments, referring to Figure 2 , the pig skeleton 1 includes a straight plate 101, a cabin body 102, end covers 103 and flanges 104; the two end covers 103 are respectively arranged at both ends of the cabin body 102 to form a pressure-sealed cabin for accommodating the power unit 3 and the driving unit 4; the straight plate 101 and the flanges 104 are symmetrically arranged on both sides of the cabin body 102, and the outer edge of the straight plate 101 abuts against the inner wall of the pipeline for scraping impurities on the inner wall of the pipeline; the flange 104 is used to fix the straight plate 101 and the umbrella-shaped leather cup assembly 2.

[0037] It should be understood that the straight plate 101 is made of non-metallic material, which can scrape off the impurities attached to the pipe wall and push the scraped impurities forward along the advancing direction of the pig. In some embodiments, the straight plate 101 is in an H-shaped structure, which can not only enhance the structural strength of the straight plate 101, but also improve the scraping efficiency. The cabin body 102 provides installation, fixation and support for the straight plate 101, the umbrella-shaped leather cup assembly 2, the power unit 3 and the driving unit 4, and forms a pressure-sealed cabin in cooperation with the end covers 103 to protect the electronic circuit from being eroded by the medium in the pipeline.

[0038] The pig skeleton 1 forms a pressure-sealed chamber through the cooperation of the end cap 103 and the cabin body 102, protecting the internal power unit 3 and the drive unit 4. At the same time, by using the symmetrically arranged straight plates 101 and flanges 104, the outer edge of the straight plate 101 contacts the inner wall of the pipeline, which helps to scrape off the impurities on the inner wall of the pipeline and improve the pigging effect. The flange 104 enhances the fixing stability of the straight plate 101 and the umbrella-shaped leather cup assembly 2, reducing the risk of component loosening caused by vibration or pressure changes.

[0039] In some embodiments, referring to Figure 3 , the umbrella-shaped leather cup assembly 2 further includes a leather cup pressing plate 204 and a connecting rod pin shaft 205; the leather cup pressing plate 204 sequentially connects the leather cup flexible body 201 and the support connecting rod 202, and is used to fix the leather cup flexible body 201 and the support connecting rod 202; the connecting rod pin shaft 205 is used to hinge the support connecting rod 202 and the telescopic connecting rod 203.

[0040] It should be understood that the connecting rod pin shaft 205 hinges the joints that need to be connected between the support connecting rod 202 and the telescopic connecting rod 203.

[0041] The umbrella-shaped leather cup assembly 2 connects the leather cup flexible body 201 and the support connecting rod 202 through the leather cup pressing plate 204, enhancing the fixing stability of the leather cup flexible body 201 and reducing the risk of deformation caused by fluid impact. At the same time, the connecting rod pin shaft 205 is used to hinge the support connecting rod 202 and the telescopic connecting rod 203, improving the movement flexibility of the umbrella-shaped leather cup assembly 2, making it expand or contract more smoothly in the pipeline.

[0042] In some embodiments, referring to Figure 4 and Figure 5 , the power unit 3 further includes a connecting rod mounting seat 304; the lead screw module 303 includes a lead screw 303a and a lead screw nut 303b; the power end of the servo motor 301 is connected to one end of the lead screw 303a, the lead screw nut 303b is sleeved on the lead screw 303a, the end of the telescopic connecting rod 203 far from the support connecting rod 202 is hinged to the connecting rod mounting seat 304, and the connecting rod mounting seat 304 is fixedly connected to the lead screw nut 303b.

[0043] It should be understood that the servo motor 301 is connected to the lead screw module 303 through a coupling 302. The rotation of the servo motor 301 drives the rotation of the lead screw 303a, causing the lead screw nut 303b to perform forward and backward linear motions. The connecting rod mounting seat 304 is fixed to the lead screw nut 303b and moves linearly with the nut. The telescopic connecting rods 203 of the front and rear umbrella-shaped leather cup assemblies 2 are hinged to the connecting rod mounting seats 304 on both sides of the lead screw nut 303b. When the servo motor 301 rotates forward, the lead screw nut 303b moves forward, providing an upward unfolding thrust to the support connecting rod 202 through the telescopic connecting rod 203, and the front-end umbrella-shaped leather cup assembly 2 will perform an unfolding action. At the same time, due to the forward movement of the lead screw nut 303b, a forward pulling force is provided to the telescopic connecting rod 203 of the rear-end umbrella-shaped leather cup assembly 2, and the telescopic connecting rod 203 drives the support connecting rod 202 to perform a contraction action on the rear-end umbrella-shaped leather cup assembly 2, as Figure 6 shown. Conversely, when the servo motor 301 rotates in reverse, the lead screw nut 303b will move backward. At this time, the front-end umbrella-shaped leather cup assembly 2 performs a contraction action, and the rear-end umbrella-shaped leather cup assembly 2 performs an unfolding action, as Figure 7 shown.

[0044] When the value collected by the pressure sensor 402 at the front end of the pig is lower than the value collected by the pressure sensor 402 at the rear end, the motor control board 401 controls the servo motor 301 to rotate forward. The lead screw nut 303b moves forward, the front-end umbrella-shaped leather cup assembly 2 of the pig unfolds, and the rear-end umbrella-shaped leather cup assembly 2 contracts. When the pressure difference between the front and rear of the pig reaches the set value that can push the pig forward, the servo motor 301 stops moving, and the pig moves forward. When the pressure difference between the front and rear of the pig has not reached the set value that can push the pig forward, the servo motor 301 rotates forward all the time, increasing the opening angle of the umbrella-shaped leather cup assembly 2, increasing the interference amount between the umbrella-shaped leather cup assembly 2 and the pipeline to improve the sealing performance until the lead screw nut 303b reaches the limit switch. At this time, the umbrella-shaped leather cup assembly 2 and the inner wall of the pipeline reach the maximum interference amount, and the servo motor 301 stops rotating. Conversely, when the value collected by the pressure sensor 402 at the front end of the pig is higher than the value collected by the pressure sensor 402 at the rear end, the motor control board 401 controls the servo motor 301 to rotate in reverse. The lead screw nut 303b moves backward, the front-end umbrella-shaped leather cup assembly 2 of the pig contracts, and the rear-end umbrella-shaped leather cup assembly 2 unfolds. When the pressure difference between the front and rear of the pig reaches the set value that can push the pig forward, the servo motor 301 stops moving.

[0045] The power unit 3 cooperates with the servo motor 301 through the lead screw module 303, so that the movement of the lead screw nut 303b on the lead screw 303a drives the link mounting seat 304 to move. Furthermore, the expansion or contraction of the umbrella-shaped leather cup assembly 2 is controlled through the articulated telescopic link 203, improving the accuracy of power transmission; the fixed connection method between the link mounting seat 304 and the lead screw nut 303b enhances the structural stability, reduces the vibration influence during the movement, and improves the operation reliability of the pig in the pipeline.

[0046] The operation state of the pig in the pipeline is as follows: When the pig is in the default state, the lead screw nut 303b is located at the middle position between the two umbrella-shaped leather cup assemblies 2. At this time, both leather cup flexible bodies 201 are in a semi-contracted state, and the outer diameter of the leather cup flexible body 201 is smaller than the inner diameter of the pipeline. Align the front end of the pig with the forward direction and push it into the pipeline launching cylinder. Apply pressure to the rear end of the pig. At this time, the pressure values P1 > P2 collected at the front and rear ends of the pig, and the servo motor 301 rotates forward. The lead screw nut 303b moves forward, the front umbrella-shaped leather cup assembly 2 expands, and the rear umbrella-shaped leather cup assembly 2 contracts. When the difference value of P1 - P2 reaches the set value, the servo motor 301 stops moving, as Figure 6 shown. After the front umbrella-shaped leather cup assembly 2 expands, it forms a sealing surface with the pipeline. After the rear umbrella-shaped leather cup assembly 2 contracts, the pressure applied at the rear end of the pig will directly act on the front umbrella-shaped leather cup assembly 2 to form a thrust force, pushing the pig forward, as Figure 8 shown. When the pig encounters an obstacle in the pipeline and forms a stuck ball, the ground operator applies reverse pressure to the pipeline. At this time, the pressure values P1 < P2 collected at the front and rear ends of the pig, and the servo motor 301 rotates in reverse. The lead screw nut 303b moves backward, the front umbrella-shaped leather cup assembly 2 contracts, and the rear umbrella-shaped leather cup assembly 2 expands. When the difference value of P2 - P1 reaches the set value, the servo motor 301 stops moving, as Figure 7 shown. After the front umbrella-shaped leather cup assembly 2 contracts, the reverse pressure passes through the front umbrella-shaped leather cup assembly 2 and directly acts on the rear expanded umbrella-shaped leather cup assembly 2 to form a thrust force, pushing the pig backward and returning it to the launching cylinder along the original route, as Figure 9 shown.

[0047] In some embodiments, referring to Figure 5 , the lead screw module 303 further includes a lead screw support seat 303c and a lead screw fixing seat 303d; the lead screw 303a is sleeved with the lead screw support seat 303c, and one end of the lead screw 303a away from the servo motor 301 is inserted into the lead screw fixing seat 303d. Both the lead screw support seat 303c and the lead screw fixing seat 303d are fixedly connected to the pig skeleton 1.

[0048] The lead screw module 303 has a dual fixing structure through the lead screw support base 303c and the lead screw fixing base 303d, enabling the lead screw 303a to maintain stable centering during operation and reducing the yaw phenomenon of the lead screw 303a caused by cantilever loading; the socket fit between the lead screw support base 303c and the lead screw 303a and the insertion structure of the lead screw fixing base 303d can disperse the radial load during the rotation of the lead screw 303a and reduce the frictional resistance during the movement of the lead screw nut 303b, thereby improving the power transmission efficiency and extending the service life of the lead screw module 303.

[0049] In some embodiments, referring to Figure 4 , the drive unit 4 further includes a limit sensor 403; the motor control board 401 is electrically connected to the limit sensor 403 through a wire. When the lead screw nut 303b moves along the lead screw 303a to a preset maximum stroke, the end of the lead screw nut 303b contacts the limit sensor 403 to trigger the motor control board 401 to turn off the servo motor 301.

[0050] It should be understood that the preset maximum stroke refers to the maximum safe distance that the lead screw nut 303b is allowed to move on the lead screw 303a, and its specific value needs to be determined comprehensively according to the mechanical design requirements and application scenarios.

[0051] The limit sensor 403 is electrically connected to the motor control board 401 through a wire and automatically triggers shutdown protection when the lead screw nut 303b moves to the preset maximum stroke, which can prevent the lead screw module 303 from over-running and reduce the risk of overload damage to the mechanical structure; the limit sensor 403 helps to maintain the umbrella-shaped leather bowl assembly 2 working within a safe stroke range and improves the stability and reliability of the pig operation.

[0052] In some embodiments, the leather bowl flexible body 201 has an umbrella shape, and multiple folds are evenly arranged along the circumference of the leather bowl flexible body 201. The support connecting rods 202 are arranged on both sides of the folds of the leather bowl flexible body 201 and are used to support the expansion or contraction of the leather bowl flexible body 201.

[0053] It should be understood that when the umbrella-shaped leather bowl contracts, the leather bowl flexible body 201 at the folds will be compressed, reducing the outer diameter of the leather bowl flexible body 201. The support connecting rods 202 are evenly distributed on both sides of the folds of the leather bowl flexible body 201. When the leather bowl flexible body 201 expands, the support connecting rods 202 provide support for the leather bowl flexible body 201 to maintain the expanded state and form a seal with the inner wall of the pipeline, providing power for the pig; when the umbrella-shaped leather bowl contracts, the support connecting rods 202 will pull the leather bowl flexible body 201 downward to compress, reducing the outer diameter of the leather bowl flexible body 201 until the leather bowl flexible body 201 fits against the outer wall of the cabin 102.

[0054] The cup flexible body 201 adopts an umbrella-shaped structure and is evenly provided with multiple folds along the circumference. In cooperation with the arrangement of the support connecting rods 202 on both sides of the folds, the radial deformation ability of the cup flexible body 201 can be improved, making it fit the inner wall of the pipeline better; the setting of the support connecting rods 202 helps to maintain the structural stability of the cup flexible body 201, reduce local stress concentration during the unfolding or contraction process, and thus improve the adaptability and sealing effect of the pigging operation.

[0055] In some embodiments, both the straight plate 101 and the cup flexible body 201 are made of polyurethane material.

[0056] The straight plate 101 and the cup flexible body 201 made of polyurethane material can take into account both the structural strength and the elastic deformation ability, enabling the straight plate 101 to maintain appropriate rigidity when scraping impurities in the pipeline, and at the same time enabling the cup flexible body 201 to maintain good resilience during unfolding and contraction; this material selection helps to reduce the frictional loss between the components and the inner wall of the pipeline, extend the service life of the key components of the pig, and improve its adaptability in complex pipeline environments.

[0057] In some embodiments, the drive unit 4 further includes a battery 404 embedded inside the cabin 102 of the pig skeleton 1. The battery 404 is electrically connected to the motor control board 401, the pressure sensor 402, the limit sensor 403, and the servo motor 301 through a power supply line to provide power for the entire drive unit 4 and the servo motor 301.

[0058] By embedding the battery 404 inside the cabin 102 of the pig skeleton 1 and providing power to each electrical component through a power supply line, the continuous operation ability of the pig in the pipeline can be maintained; the built-in arrangement of the battery 404 helps to protect the power supply system from the external environment, reduce the risk of line damage, and at the same time optimize the utilization rate of the internal space of the pig, improving the compactness and reliability of the overall structure.

[0059] In some embodiments, refer to Figure 2 , the pig skeleton 1 further includes a spacer ring 105; the spacer ring 105 is sleeved on the cabin 102, and the spacer ring 105 is located between the straight plate 101 and the umbrella-shaped cup assembly 2 for isolating the straight plate 101 and the umbrella-shaped cup assembly 2.

[0060] By setting the spacer ring 105 on the cabin 102 so that the spacer ring 105 is located between the straight plate 101 and the umbrella-shaped cup assembly 2, the working areas of the two functional components can be effectively isolated, reducing the interference of the scraping operation of the straight plate 101 on the umbrella-shaped cup assembly 2; this isolation structure helps to maintain the movement independence of the umbrella-shaped cup assembly 2, reduce the risk of mechanical interference between components, and thus improve the coordination and stability of the overall operation of the pig.

[0061] As can be seen from the above technical solutions, an umbrella-shaped leather cup two-way traveling pigging device provided by an embodiment of the present application includes: a pigging device skeleton 1, an umbrella-shaped leather cup assembly 2, a power unit 3, and a driving unit 4; two groups of the umbrella-shaped leather cup assemblies 2 are symmetrically arranged at the front and rear ends of the pigging device skeleton 1; the umbrella-shaped leather cup assembly 2 includes a leather cup flexible body 201, a support connecting rod 202, and a telescopic connecting rod 203. The support connecting rod 202 is connected to the leather cup flexible body 201. One end of the telescopic connecting rod 203 is hinged to the support connecting rod 202, and the other end of the telescopic connecting rod 203 is connected to the power unit 3; the power unit 3 includes a servo motor 301, a coupling 302, and a lead screw module 303. The servo motor 301 is connected to the lead screw module 303 through the coupling 302; the driving unit 4 includes a motor control board 401 and a pressure sensor 402; the two pressure sensors 402 are respectively arranged at the front and rear ends of the pigging device skeleton 1 for detecting the pressure difference before and after the pigging device; the motor control board 401 is electrically connected to the pressure sensor 402 and the servo motor 301 to control the forward or reverse rotation of the servo motor 301 according to the pressure difference, and then drive the expansion or contraction of the umbrella-shaped leather cup assembly 2 to solve the problem of poor passability of the pigging device.

[0062] For the similar parts between the embodiments provided in the present application, reference can be made to each other. The specific embodiments provided above are only several examples under the general concept of the present application and do not constitute a limitation on the protection scope of the present application. For those skilled in the art, any other embodiments extended based on the solution of the present application without creative efforts belong to the protection scope of the present application.

Claims

1. An umbrella-shaped leather cup two-way walking pigging device, characterized in that, Comprising: A pigging device skeleton (1), an umbrella-shaped leather cup assembly (2), a power unit (3) and a driving unit (4); Two groups of the umbrella-shaped leather cup assemblies (2) are symmetrically arranged at the front and rear ends of the pigging device skeleton (1); The umbrella-shaped leather cup assembly (2) includes a leather cup flexible body (201), a support connecting rod (202) and a telescopic connecting rod (203). The support connecting rod (202) is connected to the leather cup flexible body (201). One end of the telescopic connecting rod (203) is hinged to the support connecting rod (202), and the other end of the telescopic connecting rod (203) is connected to the power unit (3); The power unit (3) includes a servo motor (301), a coupling (302) and a lead screw module (303). The servo motor (301) is connected to the lead screw module (303) through the coupling (302); The driving unit (4) includes a motor control board (401) and a pressure sensor (402); Two of the pressure sensors (402) are respectively arranged at the front and rear ends of the pigging device skeleton (1) for detecting the pressure difference before and after the pigging device; The motor control board (401) is electrically connected to the pressure sensor (402) and the servo motor (301) to control the forward or reverse rotation of the servo motor (301) according to the pressure difference, thereby driving the expansion or contraction of the umbrella-shaped leather cup assembly (2).

2. The pigging device with umbrella-shaped cup leather for bidirectional travel according to claim 1, characterized in that The pigging device skeleton (1) includes a straight plate (101), a cabin body (102), an end cover (103) and a flange (104); Two of the end covers (103) are respectively arranged at both ends of the cabin body (102) to form a pressure-sealed cabin for accommodating the power unit (3) and the driving unit (4); The straight plate (101) and the flange (104) are symmetrically arranged on both sides of the cabin body (102). The outer edge of the straight plate (101) abuts against the inner wall of the pipeline for scraping impurities on the inner wall of the pipeline; the flange (104) is used for fixing the straight plate (101) and the umbrella-shaped leather cup assembly (2).

3. The pigging device with umbrella-shaped leather cup for bidirectional travel according to claim 1, wherein, The umbrella-shaped leather cup assembly (2) further includes a leather cup pressing plate (204) and a connecting rod pin shaft (205); The leather cup pressing plate (204) is sequentially connected to the leather cup flexible body (201) and the support connecting rod (202) for fixing the leather cup flexible body (201) and the support connecting rod (202); the connecting rod pin shaft (205) is used for hinging the support connecting rod (202) and the telescopic connecting rod (203).

4. The pigging tool with umbrella-shaped cup leather for two-way travel according to claim 1, characterized in that, The power unit (3) further includes a connecting rod mounting seat (304); the lead screw module (303) includes a lead screw (303a) and a lead screw nut (303b); The power end of the servo motor (301) is connected to one end of the lead screw (303a). The lead screw nut (303b) is sleeved on the lead screw (303a). One end of the telescopic connecting rod (203) far from the support connecting rod (202) is hinged to the connecting rod mounting seat (304), and the connecting rod mounting seat (304) is fixedly connected to the lead screw nut (303b).

5. The pigging tool with umbrella-shaped leather cup for two-way running according to claim 4, wherein The lead screw module (303) further includes a lead screw support seat (303c) and a lead screw fixing seat (303d); The lead screw (303a) is sleeved with a lead screw support seat (303c), and one end of the lead screw (303a) away from the servo motor (301) is inserted into a lead screw fixing seat (303d). Both the lead screw support seat (303c) and the lead screw fixing seat (303d) are fixedly connected to the pigging device skeleton (1).

6. The pigging tool with umbrella-shaped leather cup for two-way running according to claim 4, characterized in that, The drive unit (4) further includes a limit sensor (403); The motor control board (401) is electrically connected to the limit sensor (403) through a wire. When the lead screw nut (303b) moves along the lead screw (303a) to a preset maximum stroke, the end of the lead screw nut (303b) contacts the limit sensor (403) to trigger the motor control board (401) to turn off the servo motor (301).

7. The pigging device with umbrella-shaped leather cup for bidirectional travel according to claim 1, characterized in that, The leather cup flexible body (201) is of an umbrella-shaped structure, and a plurality of folds are evenly arranged along the circumference of the leather cup flexible body (201). The support connecting rods (202) are arranged on both sides of the folds of the leather cup flexible body (201) and are used to support the expansion or contraction of the leather cup flexible body (201).

8. The pigging device with umbrella-shaped leather cup for two-way travel according to claim 2, characterized in that, Both the straight plate (101) and the leather cup flexible body (201) are made of polyurethane material.

9. The pigging device with umbrella-shaped cup leather for two-way running according to claim 2, characterized in that, The drive unit (4) further includes a battery (404) embedded inside the cabin body (102) of the pigging device skeleton (1). The battery (404) is electrically connected to the motor control board (401), the pressure sensor (402), the limit sensor (403), and the servo motor (301) respectively through a power supply line.

10. The pigging device with umbrella-shaped leather cup for two-way travel according to claim 2, characterized in that, The pigging device skeleton (1) further includes a spacer ring (105); The spacer ring (105) is sleeved on the cabin body (102), and the spacer ring (105) is located between the straight plate (101) and the umbrella-shaped leather cup assembly (2) and is used to isolate the straight plate (101) and the umbrella-shaped leather cup assembly (2).

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