A self-cleaning device for pipes

Abstract

The application discloses a pipeline self-unblocking device, and relates to the technical field of equipment, which comprises an inner hose and an outer pipe sleeved outside the inner hose, and further comprises a pipeline vehicle installed between the inner hose and the outer pipe, wherein the pipeline vehicle comprises a vehicle frame, a wheel installed on the vehicle frame and used for contacting with an inner side wall of the outer pipe, an extension plate installed on the vehicle frame and used for pushing the inner hose, and a first driving motor installed on the vehicle frame and used for driving the wheel to rotate or stop, so as to drive the pipeline vehicle to move along the axial direction of the outer pipe; thus, the problems of machine stoppage and work loss, high labor cost, poor adaptation of general unblocking equipment to sauce working conditions, easy slippage during operation, incapability of self-adapting to pipe diameters and easy damage to pipelines of the traditional unblocking mode are solved.

Description

Technical Field

[0001] This invention relates to the field of equipment technology, and more specifically, to a self-draining device for pipelines. Background Technology

[0002] In the automated filling process of sauces, various sauces such as broad bean paste, tomato sauce, peanut butter, and salad dressing generally have the characteristics of high viscosity, easy solidification at room temperature, and solid-liquid mixture containing particulate impurities. During the continuous transportation of sauces in pipelines, they are very easy to adhere and accumulate on the inner wall of the pipeline, gradually forming scale and narrowing the diameter. In severe cases, it can cause partial or complete blockage of the pipeline, directly leading to problems such as unstable filling flow, quantitative accuracy deviation, and production line shutdown due to material shortage, which greatly affects filling production efficiency and product qualification rate.

[0003] In existing technologies, the main methods for dealing with blockages in filling pipes are manual unblocking or pipe disassembly and cleaning. Manual unblocking or high-pressure water flushing is inefficient, labor-intensive, and often incomplete, easily damaging the inner wall of the pipe. Pipe disassembly and cleaning requires production to be suspended, and the disassembly and installation process is cumbersome, not only affecting production efficiency but also potentially leading to sauce waste and reduced pipe sealing performance, increasing production costs. Existing pipe unblocking devices or pigs typically come into direct contact with the conveying medium during operation, acting directly on the inner wall of the pipe through scrapers, brushes, or high-pressure fluid. However, for flexible hoses used in food sauce filling, direct scraping can easily damage the inner wall, and the unblocking components are easily stuck and jammed by high-viscosity sauces.

[0004] Currently, there are a few pipe cleaning devices available, but most of them are general-purpose cleaning structures designed for liquid pipes. They cannot adapt to the viscous properties of sauces, and the cleaning parts are prone to sticking to the sauce and cannot be pushed in effectively during cleaning. As a result, the cleaning effect is poor and cannot meet the special cleaning needs of sauce filling pipes. Summary of the Invention

[0005] This invention provides a self-cleaning pipe device to solve the problems of traditional cleaning methods, such as downtime and work loss, high labor costs, poor compatibility of general cleaning equipment with sauce working conditions, easy slippage during operation, inability to adapt to pipe diameter, and easy damage to pipes.

[0006] To achieve the above objectives, the present invention provides the following solution: A self-dredging pipe device includes an inner flexible hose and an outer pipe sleeved outside the inner flexible hose, and a pipe trolley installed between the inner flexible hose and the outer pipe. The pipe trolley includes a frame, wheels mounted on the frame for contacting the inner wall of the outer pipe, a telescopic plate mounted on the frame for pushing the inner flexible hose, and a first drive motor mounted on the frame for driving the wheels to rotate or stop, so as to drive the pipe trolley to move axially along the outer pipe.

[0007] Furthermore, the telescopic plate includes a push plate for contacting the outer wall of the inner hose and at least two sets of linear guide rails mounted on the frame for pushing the push plate to move and / or adjusting the posture of the push plate. The at least two sets of linear guide rails are arranged at intervals along the axial direction of the inner hose, and the moving end of each set of linear guide rails is fixedly connected to the push plate.

[0008] Furthermore, the edge of the push plate near the inner hose is rounded.

[0009] Compared to the right-angle push plate structure, the full rounded corner transition design makes the contact between the push plate and the flexible inner hose smoother and gentler, completely eliminating the risk of sharp edges scratching and cutting the pipe wall. During high-frequency reciprocating pushing and tilting scraping operations, it can effectively protect the structural integrity of the food-grade inner hose, avoid pipe wall wear, cracking, aging and damage, extend the service life of the pipe, and at the same time, there is no debris generation and no sanitary dead corners, meeting the clean production standards for food sauce filling.

[0010] Furthermore, the frame includes two rotatably connected brackets, with the wheels rotatably mounted at both ends of each bracket, and a first telescopic column is installed on each bracket to control the relative rotation or stopping of the two rotatably connected brackets.

[0011] Furthermore, both ends of the bracket are rotatably mounted with sliding shafts, and the frame also includes a sliding base. The sliding base has a sliding through hole for accommodating the sliding shaft. A second drive motor is fixedly mounted on the sliding base. One end of the sliding shaft is rotatably connected to the bracket, and the other end extends into the sliding through hole for transmission connection with the output shaft of the second drive motor.

[0012] Furthermore, the bracket has sliding bases installed at both ends. Each sliding base is equipped with a rotating wheel that contacts the inner wall of the outer tube and is driven to rotate, thereby causing the pipe cart to rotate circumferentially along the outer tube. A second telescopic column is also installed to drive the rotating wheel to extend or stop. The fixed end of the second telescopic column is installed on the side of the sliding base facing the outer tube, and the rotating wheel is installed on the telescopic end of the second telescopic column. The axis of the rotating wheel is parallel to the axis of the outer tube.

[0013] Furthermore, the outer circumference of the rotating wheel is covered with an anti-slip silicone layer, and the surface of the anti-slip silicone layer is provided with fine anti-slip texture. The fine anti-slip texture on the surface can further increase the friction coefficient between the rotating wheel and the inner wall of the outer pipe, ensuring that the circumferential adjustment process of the pipeline vehicle is controllable and free from slippage and deviation. After the adjustment is completed, the support is stable, further improving the overall equipment operation stability and adjustment accuracy.

[0014] Furthermore, the wheel is provided with multiple anti-slip grooves along the axial direction, and the inner wall of the outer tube is provided with multiple anti-slip rings. The axis of the anti-slip rings is collinear with the axis of the outer tube, and the anti-slip grooves are matched with the anti-slip rings.

[0015] Through the interlocking and limiting structure of the anti-slip groove and the anti-slip ring on the inner side of the outer pipe, under the weight of the pipeline vehicle and the force of scraping the inner hose, the wheel slippage, free spin, and deviation can be effectively prevented, ensuring that the pipeline vehicle moves steadily and uniformly along the pipeline axis, ensuring stable operation throughout the dredging process, and good dredging uniformity. This solves the defects of existing dredging devices that fail to move and do not dredge thoroughly under sauce conditions.

[0016] Furthermore, multiple pressure sensors are provided on the outer wall of the inner hose. The pressure sensors are connected to a controller for controlling the operation of the pipeline vehicle. The controller is configured to adjust the pushing action of the telescopic plate according to the signals from the pressure sensors.

[0017] Furthermore, multiple pressure sensors are arranged in a uniform array along the axial and circumferential directions of the inner hose to collect the deformation pressure of the hose wall at multiple points and provide feedback to adjust the pushing stroke and pushing speed of the telescopic plate.

[0018] The array of pressure sensors can build a pipe wall pressure sensing network, which can distinguish between unobstructed areas, areas with slight scale buildup, and areas with localized heavy caking, locate the blockage coordinates, and classify the blockage conditions. It can automatically match differentiated unblocking strategies for different conditions, realize zoned, graded, and targeted intelligent unblocking, effectively reduce equipment energy consumption and pipe damage, and greatly improve the unblocking adaptability and operational intelligence under complex sauce conditions.

[0019] One or more technical solutions provided by this invention have at least the following technical effects or advantages: (1) This invention adopts a double-layer pipe sandwich built-in dredging structure, which integrates the pipe cart inside the annular cavity of the inner hose and the outer pipe, without occupying external installation space or modifying the original filling pipeline structure. During operation, the pipe cart relies on its autonomous walking function and actively pushes the inner hose with the telescopic plate, so that the flexible inner hose produces periodic contraction and expansion elastic deformation. The radial extrusion force and fluid oscillation force generated by the deformation of the pipe wall are used to quickly peel off and shake off the viscous sauce, fruit pulp particles and solidified scale attached to the inner wall of the pipe, so as to realize online fully automatic dredging without stopping the production line or disassembling the pipe. It solves the pain points of traditional manual pipe disassembly and cleaning, high pressure flushing, downtime, cumbersome operation and sluggish dredging. It is highly suitable for the special conveying conditions of sauces with high viscosity, easy solidification and solid particles. (2) Two working modes, synchronous extension and differential extension, can be realized through two sets of linear guide rails: In the synchronous extension mode, the two guide rails work together to drive the push plate to move smoothly forward and backward, and perform uniform and stable squeezing and expansion operations on the inner hose to realize normalized preventive deformation dredging of the pipeline; In the differential extension mode, by controlling the difference in the extension length of the two sets of linear guide rails, the tilt angle of the push plate can be changed, so that the upper or lower end of the push plate will first fit against the inner hose wall. Combined with the axial movement of the pipeline vehicle, a directional oblique scraping force is formed on the inner wall of the inner hose, which can effectively peel off stubborn adhesive sauce and thin layer scale that are difficult to remove by conventional vertical push. It breaks the defects of the traditional dredging method with a single function and many dead corner residues, and greatly improves the overall cleanliness of the pipeline. (3) The two sets of brackets are hinged together to form a frame body that can be opened and closed adaptively. The opening angle of the two sets of brackets can be adjusted by the telescopic action of the first telescopic column, and the support distance of the wheels at both ends of the frame can be changed in real time. This allows the device to adapt to different inner diameter specifications of outer tubes and inner hoses, greatly improving the equipment's versatility. There is no need to replace the unclogging parts for different pipe diameters. At the same time, the opening force of the brackets can be finely adjusted by the first telescopic column, so that the wheels can moderately squeeze the inner wall of the outer tube, actively increasing the pre-tightening friction between the wheels and the pipe wall, structurally reducing the risk of wheel slippage and ensuring walking stability. (4) Through the core linkage compensation structure of the frame adaptive adjustment, during the opening and closing of the first telescopic column drive bracket and the adaptation to different pipe diameters, the sliding base can adaptively slide along the sliding axis to automatically compensate for the stroke deviation and position error caused by the opening and closing of the frame, and always ensure that the telescopic plate, push plate and inner hose are centered and aligned, ensuring that the push plate can act on the optimal dredging position of the pipeline under any pipe diameter working condition. The structure has strong linkage and high alignment accuracy, solving the problems of dredging offset, unilateral force and local dredging failure after diameter adaptation. (5) Through the combination structure of telescopic column and rotating wheel, the two core functions of auxiliary support and circumferential adjustment can be realized: On the one hand, the extension length of the second telescopic column is adaptively adjusted to drive the rotating wheel to roll and support against the inner wall of the outer pipe, forming a double support structure with the main wheel, which improves the stability of the pipeline vehicle traveling long distances; On the other hand, the rotating wheel can be lifted by the second telescopic column to lift it and break away from the limit of the main wheel. The rotating wheel can be used to drive the pipeline vehicle to rotate along the circumference of the pipeline, adjust the circumferential position of the push plate, and make the push plate correspond to the blockage and sauce adhesion areas at different positions of the pipeline circumference, so as to achieve targeted and fixed-point dredging, solve the problem of difficult removal of local blockage on one side of the pipeline, and make the circumferential dredging of the pipeline without dead angles. (6) The present invention adopts an external pipe wall pressure detection scheme, which relies on pressure sensors to collect dynamic pressure data in real time during the pushing deformation process of the inner hose. It can promptly provide feedback on the thickness of sauce accumulation inside the pipe, the location of clumps, the severity of blockage, and the real-time stress state of the pipe wall. The controller forms an intelligent closed-loop control based on the real-time pressure data, and adaptively adjusts the pushing force, pushing stroke, reciprocating frequency, and working mode of the telescopic plate. This avoids incomplete unblocking due to insufficient pushing force and reduces pipe fatigue damage caused by excessive pushing, thus achieving refined, intelligent, and safe unblocking operations. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. Figure 1 This is a front view of the self-dredging device for pipes in this invention; Figure 2 This is a schematic diagram of the self-dredging device for pipes in this invention; Figure 3 yes Figure 1 Cross-sectional view of section AA; Figure 4 This is a schematic diagram of the wheel structure in this invention; Figure 5 This is a cross-sectional view of the linear guide rail in the self-dredging pipe device of the present invention; Among them, 1-inner hose, 2-outer pipe, 201-anti-slip ring, 3-pipeline cart, 4-carriage frame, 401-support, 402-first telescopic column, 403-sliding shaft, 404-sliding base, 405-sliding through hole, 406-second telescopic column, 407-rotating wheel, 5-wheel, 501-anti-slip groove, 6-telescopic plate, 601-linear guide rail, 602-push plate. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below. Example 1: This example provides a self-draining pipe device, such as... Figures 1-2As shown, the device includes an inner flexible hose 1 and an outer tube 2 sleeved outside the inner flexible hose 1. It also includes a pipe cart 3 installed between the inner flexible hose and the outer tube 2. The pipe cart 3 includes a frame 4, wheels 5 mounted on the frame 4 for contacting the inner wall of the outer tube 2, a telescopic plate 6 mounted on the frame 4 for pushing the inner flexible hose 1, and a first drive motor mounted on the frame 4 for driving the wheels 5 to rotate or stop, so as to drive the pipe cart 3 to move axially along the outer tube 2.

[0023] The device employs a double-layer pipeline structure, comprising a food-grade flexible inner hose 1 for conveying sauces and a rigid stainless steel outer hose 2 fitted over the inner hose 1 for overall support and protection. The inner hose 1 possesses excellent elastic deformation capability, allowing it to elastically contract and rebound under external force, providing a structural basis for deformation-based unblocking. A pipeline cart 3 is movably installed within the annular cavity formed by the inner hose 1 and the outer hose 2. The pipeline cart 3 is the core unblocking unit of the device, capable of moving freely along the pipeline axis. The pipeline cart 3 includes a frame 4, wheels 5, and a telescopic mechanism for deformation-based unblocking. Plate 6; To effectively clamp, squeeze, and scrape the inner hose 1, two telescopic plates 6 are preferably provided, symmetrically distributed on both sides of the inner hose 1, and move synchronously, including synchronously moving closer to or away from the inner hose 1, and simultaneously contacting and squeezing the inner hose 1; To provide sufficient support points for the pipe cart 3, eight wheels 5 are preferably provided on the frame 4. The pipe cart 3 has a roughly prismatic structure, with the eight wheels 5 evenly distributed on the eight vertices of the prism, driven by the first drive motor to rotate simultaneously, ensuring that all eight wheels 5 can simultaneously contact the inner wall of the outer tube 2, increasing friction; preferably, such as Figure 4 As shown, each wheel 5 is preferably equipped with a separate drive motor. The drive motor transmits power to the wheel 5 through bevel gear meshing. The drive motors of each wheel are controlled by the same control center to achieve synchronous start and stop. The housing of the device is omitted in the figure. The housing adopts the existing housing and is set according to the size and shape of the device. The installation method, transmission method and control method of the eight wheels are all implemented using existing technology. The specific structure and control method are not specifically limited in this application. Example 2: Based on Example 1, such as Figure 2 and Figure 5 As shown, the telescopic plate 6 includes a push plate 602 for contacting the outer wall of the inner hose 1 and at least two sets of linear guide rails 601 mounted on the frame 4 for pushing the push plate 602 to move and / or adjusting the posture of the push plate 602. The at least two sets of linear guide rails 601 are arranged at intervals along the axial direction of the inner hose 1, and the moving end of each set of linear guide rails 601 is fixedly connected to the push plate 602.

[0024] Preferably, two linear guide rails 601 are provided, consisting of a guide rail and a slider. The guide rail contains a lead screw driven by a motor, and the slider matches the lead screw, thereby driving the push plate 602 on the slider to extend and retract. The linear guide rails 601 are distributed along the axis of the outer tube 2 and can extend and retract synchronously. Compared to a single extension structure, this provides higher transmission stability and more uniform pushing force, effectively avoiding local stress concentration in the inner hose 1 and ensuring uniform force distribution on the inner hose 1. Alternatively, they can extend and retract asynchronously. For example, the linear guide rail 601 at the front end of the inner hose 1 may be longer than the linear guide rail 601 at the rear end. In this case, the end of the push plate 602 closest to the front end of the inner hose 1 contacts the inner hose 1 first, and the pipe cart 3 moves towards the rear end of the inner hose 1, subjecting the inner hose 1 to a scraping force from front to rear. While clearing blockages inside the inner hose 1, the sauce inside the inner hose 1 is pushed towards the rear end of the inner hose 1 to further clear the blockage. This effectively reduces the possibility of secondary blockages and also helps clear the filling port that the pipeline truck 3 cannot reach. Alternatively, the length of the linear guide rail 601 at the front end of the inner hose 1 can be made shorter than that at the rear end of the inner hose 1. In this case, the end of the push plate 602 near the rear end of the inner hose 1 contacts the inner hose 1 first, and the pipeline truck 3 moves towards the front end of the inner hose 1, so that the inner hose 1 is subjected to scraping force from the rear end to the front end. While scraping away the blockages inside the inner hose 1, the sauce inside the inner hose 1 is pushed towards the front end of the inner hose 1 to further clear the blockage. This not only effectively reduces the possibility of secondary blockages but also helps clear the sauce can outlet that the pipeline truck 3 cannot reach.

[0025] In this invention, the sauce is stored in a sauce container and connected to the filling port through an inner hose 1 and an outer hose 2. Therefore, the front end of the inner hose 1 and the outer hose 2 refers to the end of the inner hose 1 and the outer hose 2 that is close to the sauce container, and the rear end of the inner hose 1 and the outer hose 2 refers to the end of the inner hose 1 and the outer hose 2 that is close to the filling port.

[0026] In a more preferred embodiment, the edge of the push plate 602 near the inner hose 1 is rounded. The rounded corner structure eliminates the sharp edges of the push plate 602, preventing scratching, wear, or tearing of the inner hose 1 wall during repeated pushing and squeezing, effectively protecting the integrity of the pipeline structure, extending the service life of the equipment, and meeting the hygiene and safety requirements of food filling equipment, with no debris or residue dead corners.

[0027] The working principle of this embodiment is as follows: This device is installed inside the sauce filling and conveying pipeline. It can be on standby online with the production line for a long time without modifying the original filling equipment structure, without occupying external space, and is compatible with various existing automated sauce filling production lines.

[0028] Under normal filling operation conditions, the pipeline vehicle 3 is parked in the standby area at the end of the pipeline, the telescopic plate 6 is in the retracted and reset state, the push plate 602 is completely disengaged from the outer wall of the inner hose 1, the inner hose 1 maintains a standard circular diameter, and the sauce can be conveyed normally and smoothly along the inside of the inner hose 1 without affecting the normal filling accuracy and production rhythm of the production line. In long-term continuous filling production, high-viscosity sauces, fine fruit pulp particles, and spice residues are very easy to slowly adhere to and accumulate on the inner wall of the inner hose 1, gradually forming a thin layer of scale, causing the pipe diameter to shrink, the delivery flow rate to decrease, and the pipeline pressure to increase. If not cleaned in time, they will continue to accumulate and harden, eventually forming a severe blockage and causing shutdown failure. When the inner wall of the inner hose 1 is clogged by viscous sauce or particulate impurities, the linear guide rail 601 is controlled to reciprocate and extend, driving the push plate 602 to periodically press and release the outer wall of the inner hose 1, causing the inner hose 1 to continuously contract and rebound. The squeezing and vibration force generated by the deformation of the hose wall is used to peel off the stubborn sauce residue attached to the inner wall. The peeled impurities are naturally discharged with the sauce fluid, realizing online unblocking without stopping the machine, solving the problem of low efficiency of traditional unblocking and manual cleaning when the machine is stopped. When the linear guide rail 601 cannot clear the inner hose 1 by simply reciprocating, or when the filling port is blocked and the pipeline vehicle 3 cannot reach the blockage point, the linear guide rail 601 is controlled to extend. The length of the linear guide rail 601 at the front end of the inner hose 1 is greater than that at the rear end of the inner hose 1. The end of the push plate 602 near the front end of the inner hose 1 contacts the inner hose 1 first. The pipeline vehicle 3 moves towards the rear end of the inner hose 1, so that the inner hose 1 is subjected to scraping force from the front end to the rear end. While scraping away the blockage in the inner hose 1, the sauce inside the inner hose 1 is pushed towards the rear end of the inner hose 1, so as to clear the inner hose 1 or the filling port. When the end of the inner hose 1 near the sauce container is blocked, and the pipeline cart 3 cannot reach the blockage point, the linear guide rail 601 is extended. The length of the linear guide rail 601 at the front end of the inner hose 1 is shorter than that at the rear end of the inner hose 1. The push plate 602 at the rear end of the inner hose 1 contacts the inner hose 1 first, and the pipeline cart 3 moves towards the front end of the inner hose 1, so that the inner hose 1 is subjected to a scraping force from the rear end to the front end. While scraping away the blockage in the inner hose 1, the sauce inside the inner hose 1 is pushed towards the front end of the inner hose 1, so as to unclog the inner hose 1 or the end of the inner hose 1 near the sauce container. Example 3: Based on any of the above examples, such as Figure 2 As shown, the frame 4 includes two rotatably connected brackets 401, with the wheels 5 rotatably mounted at both ends of each bracket 401. A first telescopic column 402 is installed on each bracket 401 to control the relative rotation or stop of the two rotatably connected brackets 401.

[0029] The frame 4 consists of two sets of brackets 401, each set of brackets 401 being symmetrical and hinged to each other. Both sets of brackets 401 can rotate and open relative to each other, achieving adaptive adjustment of the outer diameter. The length of the bracket 401 is greater than the diameter of the outer tube 2. The wheels 5 are installed at both ends of the bracket 401, achieving eight-point support for walking, ensuring balanced force and stable movement of the frame 4. The opening and closing angle of the two sets of brackets 401 can be adjusted by the telescopic movement of the first telescopic column 402, achieving adaptive adjustment of the overall outer diameter of the frame 4. It can be used with outer tubes 2 and inner hoses 1 of different inner diameter specifications, with strong versatility, eliminating the need to change the unblocking equipment for different pipe diameters. Preferably, a first telescopic column 402 is set at each end of the hinge point of the bracket 401, extending and retracting synchronously, simultaneously controlling and supporting both ends of the bracket 401, enhancing its structural strength. The first telescopic column 402 can be an existing hydraulic cylinder or a sleeve-type telescopic column. The specific type of first telescopic column 402 used, as well as its specific installation and control methods, are not specifically limited.

[0030] In a more preferred embodiment, such as Figure 2 and Figure 3 As shown, both ends of the bracket 401 are rotatably mounted with sliding shafts 403. The frame 4 also includes a sliding base 404. The sliding base 404 has a sliding through hole 405 for accommodating the sliding shaft 403. A second drive motor is fixedly mounted on the sliding base 404. One end of the sliding shaft 403 is rotatably connected to the bracket 401, and the other end extends into the sliding through hole 405 for transmission connection with the output shaft of the second drive motor.

[0031] Preferably, a rack is provided on the sliding shaft 403, and a through hole is opened on the side wall of the sliding through hole 405, which communicates with the interior of the sliding base 404. A gear is provided inside the sliding base 404, and the gear meshes with the rack. The gear is driven by a motor, and the rotation of the motor is controlled by the control center, thereby adjusting the relative position of the sliding base 404 and the sliding shaft 403, so as to make fine adjustments to the orientation of the sliding base 404. When the first telescopic column 402 adjusts the opening and closing angle of the bracket 401 to adapt to different pipe diameters, the sliding base 404 can adapt to the sliding displacement, automatically compensate for the opening and closing stroke error of the frame 4, and always ensure that the telescopic plate 6 and the inner hose 1 are aligned, so as to maintain the best pushing and unblocking position under different pipe diameters, and the structural linkage and adaptability are greatly improved.

[0032] In a more preferred embodiment, the bracket 401 is equipped with sliding bases 404 at both ends. The sliding bases 404 are equipped with a rotating wheel 407 for contacting the inner wall of the outer tube 2 and being driven to rotate so as to drive the pipe cart 3 to rotate circumferentially along the outer tube 2, and a second telescopic column 406 for driving the rotating wheel 407 to extend or stop. The fixed end of the second telescopic column 406 is installed on the side of the sliding base 404 facing the outer tube 2, and the rotating wheel 407 is installed on the telescopic end of the second telescopic column 406. The axis of the rotating wheel 407 is parallel to the axis of the outer tube 2.

[0033] The second telescopic column 406 can adaptively adjust its telescopic length, driving the rotating wheel 407 to roll and support against the inner wall of the outer pipe 2, matching the anti-slip ring 201, and forming a double support structure with the wheel 5. When the position of the push plate 602 is different from the position of the blockage in the inner hose 1, the effect of forcibly telescopically extending the push plate 602 to clear the blockage is greatly reduced, or even fails to achieve the purpose of clearing the blockage. Therefore, the second telescopic column 406 is controlled to extend, so that the rotating wheel 407 contacts the inner wall of the outer pipe 2. The first telescopic column 402 extends, increasing the opening angle of the bracket 401, so that the wheel 5 separates from the inner wall of the outer pipe 2. The rotating wheel 407 is controlled to rotate, so that the pipe cart 3 rotates along the circumference of the outer pipe 2, thereby adjusting the position of the push plate 602 so that the push plate 602 matches the position of the blockage in the inner hose 1.

[0034] In a more preferred embodiment, the outer ring of the rotating wheel 407 is covered with an anti-slip silicone layer, and the surface of the anti-slip silicone layer is provided with fine anti-slip texture.

[0035] In a more preferred embodiment, the wheel 5 is provided with a plurality of anti-slip grooves 501 along the axial direction, and the inner sidewall of the outer tube 2 is provided with a plurality of anti-slip rings 201, the axis of the anti-slip rings 201 being collinear with the axis of the outer tube 2, and the anti-slip grooves 501 being matched with the anti-slip rings 201. Example 4: Based on any of the above embodiments, a plurality of pressure sensors are provided on the outer wall of the inner hose 1. The pressure sensors are connected to a controller for controlling the operation of the pipeline vehicle 3. The controller is configured to adjust the pushing action of the telescopic plate 6 according to the signal of the pressure sensor.

[0036] In a more preferred embodiment, a plurality of pressure sensors are arranged in a uniform array along the axial and circumferential directions of the inner hose 1 to collect the deformation pressure of the hose wall at multiple points and to provide feedback to adjust the pushing stroke and pushing speed of the telescopic plate 6.

[0037] Multiple pressure sensors are evenly arrayed along the axial and circumferential directions of the inner hose 1, covering the entire effective area for pipe dredging and forming a pressure sensing network without blind spots. During the entire process of the pipe truck 3 moving and the telescopic plate 6 pushing to dredge, the pressure sensors collect pipe wall deformation pressure data in real time and at high frequency, and transmit the analog signals to the device control center in real time. The pipe wall pressure value can correspond to the pipe blockage condition: when the pipe is unobstructed and there is no sauce accumulation, the pipe wall pushing deformation resistance is small, and the pressure value is stable in the low threshold range; when a thin layer of sauce accumulates locally and there is slight blockage, the pipe wall friction resistance increases, and the local pressure rises slightly; when there is caking, particle accumulation, or severe blockage, local flow is obstructed, deformation resistance increases sharply, and the pressure value increases significantly.

[0038] The control center has a built-in multi-level intelligent control program that can dynamically and adaptively adjust the working parameters of the telescopic plate 6 based on real-time pressure data to achieve differentiated unblocking in different zones: For unobstructed areas, it automatically reduces the pushing stroke of the linear guide rail 601 and decreases the reciprocating extension frequency, operating in a low-power standby unblocking mode to save energy and reduce consumption, while avoiding pipe fatigue damage caused by frequent deformation and compression; for slightly blocked areas, it appropriately increases the pushing force and reciprocating frequency, gradually peeling off thin layers of scale through gentle pulsating deformation to achieve preventative cleaning; for severely blocked areas with abnormally high pressure, it automatically amplifies the pushing stroke and increases the extension frequency. The reciprocating speed of the extension and retraction increases the amplitude of the pipe wall compression and vibration. It uses strong deformation and vibration to break and peel off stubborn clumps and thick sauce accumulation layers, ensuring that severe blockages are completely cleared. For severely blocked areas with abnormally high pressure and where the linear guide rail 601 cannot clear the blockage by simply reciprocating, the linear guide rail 601 can be extended to different lengths. The axis of the push plate 602 and the axis of the inner hose 1 form a certain angle. In conjunction with the movement of the pipe cart 3, the push plate 602 scrapes the inner hose 1 and also causes the inner hose 1 to peristalse, ensuring the complete removal of severe blockages and blockage points in the inner hose 1 that the pipe cart 3 cannot reach.

[0039] Meanwhile, the array-type pressure sensors can locate the blockage point, and in conjunction with the pipeline vehicle 3's movement and positioning, targeted unblocking can be achieved. This eliminates the need for high-frequency, high-intensity operations on the entire pipeline, significantly improving unblocking efficiency and reducing equipment wear. When all pressure data across the entire area returns to the normal preset threshold range, it proves that the sauce buildup on the inner wall of the pipeline has been completely cleared and the pipeline diameter has returned to normal. The control center determines that unblocking is complete, automatically controls the telescopic plate 6 to fully retract and reset, and the pipeline vehicle 3 to return to the standby position. The entire machine enters a dormant standby state, completing a fully automatic intelligent unblocking closed loop. This embodiment requires no manual operation or parameter adjustment, and can adapt to various viscosities of sauces and different degrees of blockage, balancing thorough unblocking with pipeline safety, greatly improving the intelligence level of the device and its adaptability to production lines. Example 5: Based on any of the above examples, the fully automated operation steps of the pipeline truck are included: standby, self-test and adaptation upon startup, working condition detection and judgment, dredging operation, inspection and verification, and shutdown reset and hibernation.

[0040] Step 1: Standby. During normal filling operations, the pipeline cart 3 is parked at the pre-set standby position at the end of the outer pipe 2. This position is far from the filling flow area and does not occupy the sauce conveying channel. At this time, the first telescopic column 402 and the second telescopic column 406 are both in the retracted and reset state. The wheel 5 and the rotating wheel 407 are lightly attached to the inner wall of the outer pipe 2. The telescopic plate 6 is fully retracted, and the push plate 602 is completely disengaged from the outer wall of the inner hose 1. The whole machine is in a low-power sleep standby state with no interference resistance, which does not affect the normal filling production rhythm and filling accuracy of the production line.

[0041] Step Two: Power-On Self-Check and Pipe Diameter Adaptation. When the system reaches the preset timed unblocking cycle, or when the pressure sensor or flow sensor detects abnormal pressure, flow attenuation, or other potential blockages in the pipeline, the device automatically wakes up and starts. First, it enters the self-check and adaptation process. The control center controls the synchronous extension and retraction of the first telescopic columns 402 on both sides, driving the two sets of hinged brackets 401 to adaptively open and close, matching the actual pipe diameter of the outer pipe 2 and the inner flexible hose 1. Simultaneously, through fine-tuning compensation via the sliding shaft 403 and the internal gear and rack mechanism of the sliding base 404, it ensures that the frame 4 is centered, the four wheels 5 are evenly pressed against the inner wall of the outer pipe 2, and the anti-slip groove 501 and anti-slip ring 201 are engaged, completing the pipe diameter adaptation and walking positioning calibration, eliminating the risk of walking deviation and slippage. After adaptation, the system self-checks that the pipe diameter parameters, sensor signals, and drive mechanism are all normal, and enters the unblocking state.

[0042] Step 3: Operating Condition Detection and Unblocking Mode Determination. The pipeline truck 3 starts moving axially at low speed. Simultaneously, its onboard full-area array pressure sensor collects real-time high-frequency data on the deformation pressure of the inner hose 1 in various areas. Combined with real-time flow and pipe pressure parameters from the production line, the control center intelligently determines the overall unblocking status of the pipeline and automatically matches the corresponding unblocking mode: If the pipeline is completely unblocked, no unblocking is required, and it directly enters reset sleep mode; if there is a thin layer of slight buildup in the pipeline, a low-power pulsating preventative unblocking mode is activated; if there is localized caking or severe blockage in the pipeline, an enhanced unblocking and targeted unblocking mode is activated; if there is blind spot blockage at the pipeline end, filling port, or sauce can port, a differentiated tilting scraping unblocking mode is activated.

[0043] Step 4: Diversion of dredging operations by mode. 1. Routine preventative unblocking: The pipeline vehicle 3 moves at a constant low speed, and the dual linear guide rails 601 synchronously reciprocate slightly, driving the push plate 602 to periodically and gently press against the inner hose 1. Through slight pulsating deformation of the pipe wall, thin layers of accumulated dirt are peeled off, achieving routine cleaning. 2. Intensive unblocking for severe blockages: For points with abnormal pressure, the push stroke of the linear guide rails 601 is automatically amplified, and the extension and retraction frequency is increased to enhance the squeezing and vibration effect on the pipe wall, breaking up solidified clumps and thick sauce buildup. 3. Unblocking of localized obstructions: The second telescopic column 406 is activated to support the rotating wheel 407, releasing the wheel 5 limit and completing the circumferential rotation and reorientation of the pipeline vehicle 3, so that the push plate 602 is directly facing the blockage area, achieving targeted unblocking. 4. Unblocking of blind spots and dead angles: Switching the differentiated extension and retraction mode of the dual linear guide rails 601, the push plate 602 forms an inclined scraping angle, which, together with the directional movement of the pipeline vehicle 3, pushes the blockage impurities in the blind spot to the flow area or port, thoroughly clearing the dead angle blockage.

[0044] Step 5: Full-area inspection and verification. After a single round of dredging is completed, pipeline vehicle 3 conducts a second, uniform-speed full-length inspection from one end of the pipeline to the other. Pressure sensors collect pipe wall pressure parameters a second time, covering the entire area, and compare them with the system's preset standard thresholds to verify the dredging effect in each area. If there are still areas with abnormal local pressure or unresolved blockages, the system automatically marks the blockage coordinates and repeats the corresponding dredging procedure until the overall pressure and flow parameters return to the normal standard range.

[0045] Step Six: Shutdown, Reset, and Sleep Mode. After the pipeline inspection confirms that it is completely unobstructed and free of any potential blockages, the control center controls all linear guides 601, the first telescopic column 402, and the second telescopic column 406 to retract and reset. The pipeline vehicle 3 automatically returns to the initial standby position at the end, locks the parking position, shuts down the drive and sensor acquisition modules, and enters a low-power sleep standby state, waiting for the next dredging command, thus completing a full-automatic dredging operation loop.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A self-dredging pipe device, comprising an inner flexible hose (1) and an outer pipe (2) sleeved outside the inner flexible hose (1), characterized in that, It also includes a pipe cart (3) installed between the inner hose (1) and the outer pipe (2). The pipe cart (3) includes a frame (4), wheels (5) mounted on the frame (4) for contacting the inner wall of the outer pipe (2), a telescopic plate (6) mounted on the frame (4) for pushing the inner hose (1), and a first drive motor mounted on the frame (4) for driving the wheels (5) to rotate or stop, so as to drive the pipe cart (3) to move axially along the outer pipe (2).

2. The self-dredging device for pipes according to claim 1, characterized in that, The telescopic plate (6) includes a push plate (602) for contacting the outer wall of the inner hose (1) and at least two sets of linear guide rails (601) mounted on the frame (4) for pushing the push plate (602) to move and / or adjusting the posture of the push plate (602). The at least two sets of linear guide rails (601) are arranged at intervals along the axial direction of the inner hose (1), and the moving end of each set of linear guide rails (601) is fixedly connected to the push plate (602).

3. The self-dredging device for pipes according to claim 2, characterized in that, The edge of the push plate (602) near the inner hose (1) is rounded.

4. The self-dredging device for pipes according to claim 1, characterized in that, The frame (4) includes two rotatably connected brackets (401), with the wheels (5) rotatably mounted at both ends of the brackets (401). A first telescopic column (402) is installed on the brackets (401) to control the relative rotation or stop of the two rotatably connected brackets (401).

5. A self-dredging pipe device according to claim 4, characterized in that, The bracket (401) has sliding shafts (403) rotatably mounted at both ends. The frame (4) also includes a sliding base (404). The sliding base (404) has a sliding through hole (405) for accommodating the sliding shaft (403). A second drive motor is fixedly mounted on the sliding base (404). One end of the sliding shaft (403) is rotatably connected to the bracket (401), and the other end extends into the sliding through hole (405) for transmission connection with the output shaft of the second drive motor.

6. A self-dredging pipe device according to claim 5, characterized in that, The bracket (401) has sliding bases (404) installed at both ends. The sliding bases (404) are equipped with a rotating wheel (407) for contacting the inner wall of the outer tube (2) and being driven to rotate so as to drive the pipe cart (3) to rotate circumferentially along the outer tube (2) and a second telescopic column (406) for driving the rotating wheel (407) to extend or stop. The fixed end of the second telescopic column (406) is installed on the side of the sliding base (404) facing the outer tube (2). The rotating wheel (407) is installed on the telescopic end of the second telescopic column (406). The axis of the rotating wheel (407) is parallel to the axis of the outer tube (2).

7. A self-dredging pipe device according to claim 6, characterized in that, The outer ring of the rotating wheel (407) is covered with an anti-slip silicone layer, and the surface of the anti-slip silicone layer is provided with fine anti-slip texture.

8. A self-dredging device for pipes according to claim 1, characterized in that, The wheel (5) is provided with a plurality of anti-slip grooves (501) along the axial direction, and the inner wall of the outer tube (2) is provided with a plurality of anti-slip rings (201). The axis of the anti-slip ring (201) is collinear with the axis of the outer tube (2), and the anti-slip groove (501) matches the anti-slip ring (201).

9. A self-dredging pipe device according to claim 1, characterized in that, Multiple pressure sensors are provided on the outer wall of the inner hose (1). The pressure sensors are connected to a controller for controlling the operation of the pipeline vehicle (3). The controller is configured to adjust the pushing action of the telescopic plate (6) according to the signal of the pressure sensor.

10. A self-dredging pipe device according to claim 9, characterized in that, Multiple pressure sensors are arranged in a uniform array along the axial and circumferential directions of the inner hose (1) to collect the deformation pressure of the pipe wall at multiple points and to provide feedback to adjust the pushing stroke and pushing speed of the telescopic plate (6).

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