A pig elbow deformation structure

Abstract

The utility model relates to a pig elbow deformation structure and relates to pipeline dredging technical field. The low speed axle of speed reducer is fixedly connected with propeller, the high speed axle of speed reducer is fixedly connected with universal joint, the other end of universal joint is fixedly connected with steering axle, and the scraping knife is fixedly connected on steering axle, and the scraping knife is evenly distributed along the radial circumference of steering axle. The utility model has the advantages of: the steering arm and pilot arm structure (the pilot arm enters the curved pipeline first, and the scraping knife turns only when the scraping knife enters the curved pipeline) are arranged at the front end of the scraping knife and can lag behind steering, so that the scraping knife travels in the curved pipeline according to the bending radius of the pipeline, the accidents of breaking and being stuck in the curved pipeline of the scraping knife are avoided, and the cleaning of the curved pipeline is completely thorough and has no dead angle.

Description

Technical Field

[0001] This invention relates to the field of pipeline dredging technology, and more particularly to a bend deformation structure for a pipeline cleaning tool. Background Technology

[0002] To ensure the quality and safety of fluid transported through pipelines, pipeline cleaning with pigs and regular maintenance are used to keep the pipelines in a new state and ensure efficient and safe operation. However, this is time-consuming and labor-intensive. Currently, a commonly used method is to use the kinetic energy of the liquid flow to drive a propeller, which in turn drives a scraper to scrape the inner wall of the pipeline, such as the pig disclosed in announcement number CN 110434129B. However, when the pig passes through curved pipelines, such as elbows, the axis of the scraper cannot actively rotate. It can only passively scrape the outer curved section of the elbow to enter the elbow, which can lead to scraper breakage accidents, and in severe cases, the scraper may become stuck at the elbow. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a deformation structure for the bend of a pigging tool.

[0004] The technical solution provided by this invention is: a pigging bend deformation structure, including a reducer, the reducer being a coaxial mechanical reduction mechanism, two sets of support components fixedly connected to the reducer housing along the axis front and rear, each set of support components being three circumferentially distributed, the low-speed shaft of the reducer being fixedly connected to a propeller, the high-speed shaft of the reducer being fixedly connected to a universal joint, the other end of the universal joint being fixedly connected to a steering shaft, a scraper being fixedly connected to the steering shaft, the scraper being evenly distributed radially along the steering shaft;

[0005] The steering shaft is connected to the support sleeve via needle roller bearings, shaft retaining rings, and bore retaining rings. The support sleeve and the steering shaft can rotate relative to each other and are axially positioned. Four steering arms are fixedly connected to the outer circle of the support sleeve. The four steering arms are evenly arranged around the circumference, and each steering arm is equipped with a pilot arm.

[0006] The steering arm includes a fixed arm, a support sleeve is fixedly connected to the fixed arm, a hole is opened in the fixed arm, a telescopic arm is inserted into the hole of the fixed arm, the telescopic arm is guided and slidably connected to the fixed arm, a support is provided on the outside of the telescopic arm, a compression spring B is provided between the support and the fixed arm, and a permanent magnet block is fixedly connected to the outside of the support.

[0007] The pilot arm includes a pilot wheel, which is rotatably connected to two side plates via shaft A. The two side plates are rotatably connected to the fixed arm via shaft B. A tension spring is provided between the fixed arm and the side plates on the outside of shaft B.

[0008] An opening lever is horizontally fixed between the two side plates. The fixed arm (72) extends a step (71) inside the shaft B (10). The step (71) is located inside the opening lever (81).

[0009] When the steering shaft and the reducer are coaxial, there is a distance between the opening lever and the step. When the scraper is located at the junction of the pipe and the elbow, the pilot arm located outside the elbow swings inward and the opening lever abuts against the step.

[0010] Adjustment shims are connected to the steps via countersunk bolts.

[0011] The support assembly includes a column, a reducer is fixedly connected to the column, a compression spring A is welded to the outer end face of the column, a wheel frame is welded to the outer end face of the compression spring A, and a support wheel is rotatably connected to the outer side of the wheel frame.

[0012] The beneficial effects of this invention are as follows: By setting a steering arm and a pilot arm structure with delayed steering at the front end of the scraper (the pilot arm enters the curved pipe first, and the scraper steering is activated only when the scraper enters the curved pipe), the scraper travels completely according to the bending radius of the pipe in the curved pipe, avoiding accidents such as scraper breakage or getting stuck in the curved pipe, and ensuring that the cleaning of the curved pipe is complete and thorough without leaving any dead corners. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Appendix Figure 2 It is attached Figure 1 Enlarged view of point A;

[0015] Appendix Figure 3 It is attached Figure 1 Enlarged view of point B;

[0016] Appendix Figure 4 This is a schematic diagram of the pilot arm structure in this invention;

[0017] Appendix Figure 5 This is a schematic diagram of the steering arm structure in this invention;

[0018] Appendix Figure 6 This is a schematic diagram of the supporting component in this invention;

[0019] Appendix Figure 7 This is a demonstration diagram of the scraper just entering the bend in this invention;

[0020] Appendix Figure 8 This is a demonstration diagram of the scraper entering the bend in this invention.

[0021] In the diagram, 1-reducer, 2-propeller, 3-support assembly, 31-support wheel, 32-wheel frame, 33-compression spring A, 34-support column, 4-universal joint, 5-scraper, 6-steering shaft, 7-steering arm, 71-step, 711-adjusting pad, 72-fixed arm, 73-telescopic arm, 74-support, 75-permanent magnet block, 76-compression spring B, 8-pilot arm, 81-opening lever, 82-side plate, 83-shaft A, 84-pilot wheel, 9-tension spring, 10-shaft B, 11-support sleeve, 12-retaining ring for hole, 13-needle roller bearing, 14-retaining ring for shaft. Detailed Implementation

[0022] like Figures 1-8 As shown, a pigging device with a curved deformation structure includes a reducer 1, which is a coaxial mechanical reduction mechanism. Two sets of support components 3 are fixedly connected to the housing of the reducer 1 along the axis. Each set of support components 3 is evenly distributed in three circles. The low-speed shaft of the reducer 1 is fixedly connected to a propeller 2, and the high-speed shaft of the reducer 1 is fixedly connected to a universal joint 4. The other end of the universal joint 4 is fixedly connected to a steering shaft 6. Scrapers 5 are fixedly connected to the steering shaft 6 and are evenly distributed in the radial circumference along the steering shaft 6.

[0023] The steering shaft 6 is connected to the support sleeve 11 via a needle roller bearing 13, a shaft retaining ring 14, and a hole retaining ring 12. The support sleeve 11 and the steering shaft 6 can rotate relative to each other and are axially positioned. Four steering arms 7 are fixedly connected to the outer circle of the support sleeve 11. The four steering arms 7 are evenly arranged around the circumference, and each steering arm 7 is provided with a pilot arm 8.

[0024] The steering arm 7 includes a fixed arm 72, which is fixedly connected to a support sleeve 11. The fixed arm 72 has a hole, and a telescopic arm 73 is inserted into the hole. The telescopic arm 73 is guided and slidably connected to the fixed arm 72. A support 74 is provided on the outside of the telescopic arm 73. A compression spring B76 is provided between the support 74 and the fixed arm 72. A permanent magnet block 75 is fixedly connected to the outside of the support 74.

[0025] The steering arm 7, support sleeve 11, and steering shaft 6 form an axially rigid assembly. The steering arm 7 serves to support the sleeve 11 and steering shaft 6 in aligning the pipe, while also preventing the steering arm 7 and support sleeve 11 from rotating inside the pipe. The pilot arm 8 guides the direction of movement in a straight line. Meanwhile, the permanent magnet block 75 is magnetically attracted to the inner wall of the pipe, which acts as a deceleration mechanism, creating a speed difference between the propeller 2 and the fluid flow. Otherwise, the propeller 2 would move with the fluid and would not be able to utilize the fluid's kinetic energy.

[0026] The pilot arm 8 includes a pilot wheel 84, which is rotatably connected to two side plates 82 via shaft A83. The two side plates 82 are rotatably connected to the fixed arm 72 via shaft B10. A tension spring 9 is provided between the fixed arm 72 and the side plates 82 on the outside of shaft B10.

[0027] An opening lever 81 is horizontally fixed between the two side plates 82. The fixed arm (72) extends a step (71) inside the shaft B (10), and the step (71) is located inside the opening lever (81). When the steering shaft 6 and the reducer 1 are coaxial, there is a distance between the opening lever 81 and the step 71. When the scraper 5 is located at the junction of the pipe and the elbow, the pilot arm 8 located outside the elbow swings inward and the opening lever 81 abuts against the step 71. From this point on, as the scraper 5 continues to move into the elbow, the outer pilot arm 8 continues to move along the inner wall of the outer arc of the elbow. The pilot arm 8 swings inward under the pressure of the curved arc surface of the elbow, and the opening lever 81 presses down on the step 71, causing the axis composed of the steering arm 7, the support sleeve 11, and the steering shaft 6 to bend. That is, the scraper 5 rotates along the bending radius of the elbow.

[0028] A steering arm 7 and a pilot arm 8 with delayed steering are set at the front end of the scraper 5 (the pilot arm 8 enters the curved pipe first, and the scraper 5 is turned when it enters the curved pipe), so that the scraper 5 travels completely according to the bending radius of the pipe in the curved pipe, avoiding the scraper 5 from breaking or getting stuck in the curved pipe, and cleaning the curved pipe is completely thorough and leaves no dead corners.

[0029] An adjusting shim 711 is connected to the step 71 by a countersunk bolt. By changing the back of the adjusting shim 711, the distance between the step 71 and the opening lever 81 can be changed to adapt to curved pipes with different bending radii.

[0030] The support assembly 3 includes a column 34, which is fixedly connected to the reducer 1. A compression spring A33 is welded to the outer end face of the column 34, and a wheel frame 32 is welded to the outer end face of the compression spring A33. A support wheel 31 is rotatably connected to the outer side of the wheel frame 32. The support assembly 3 serves to center the reducer 1 and the propeller 2 in the pipeline. At the same time, the support assembly 3 provides circumferential resistance, so that the reducer 1 does not rotate or rotates slowly, and the propeller 2 can use the kinetic energy of the fluid to drive the scraper 5 to rotate at high speed.

Claims

1. A pigging bend deformation structure, comprising a reducer (1), characterized in that: The reducer (1) is a coaxial mechanical reduction mechanism. Two sets of support components (3) are fixedly connected to the housing of the reducer (1) along the axis. Each set of support components (3) consists of three parts and is evenly distributed around the circumference of the reducer (1). The low-speed shaft of the reducer (1) is fixedly connected to the propeller (2). The high-speed shaft of the reducer (1) is fixedly connected to the universal joint (4). The other end of the universal joint (4) is fixedly connected to the steering shaft (6). The steering shaft (6) is fixedly connected to the scraper (5). The scraper (5) is evenly distributed around the radial circumference of the steering shaft (6). The steering shaft (6) is connected to the support sleeve (11) through the needle roller bearing (13), the shaft retaining ring (14) and the hole retaining ring (12). The support sleeve (11) and the steering shaft (6) can rotate relative to each other and be axially positioned. The outer circle of the support sleeve (11) is fixedly connected to four steering arms (7). The four steering arms (7) are evenly arranged around the circumference, and each steering arm (7) is provided with a pilot arm (8). The steering arm (7) includes a fixed arm (72), which is fixedly connected to a support sleeve (11). The fixed arm (72) has a hole, and a telescopic arm (73) is inserted into the hole of the fixed arm (72). The telescopic arm (73) is guided and slidably connected to the fixed arm (72). A support (74) is provided on the outside of the telescopic arm (73). A compression spring B (76) is provided between the support (74) and the fixed arm (72). A permanent magnet block (75) is fixedly connected on the outside of the support (74). The pilot arm (8) includes a pilot wheel (84), which is rotatably connected to two side plates (82) via shaft A (83). The two side plates (82) are rotatably connected to the fixed arm (72) via shaft B (10). A tension spring (9) is provided between the fixed arm (72) and the side plates (82) on the outside of shaft B (10). An opening lever (81) is horizontally fixed between the two side plates (82), and a step (71) extends from the inside of shaft B (10) of the fixed arm (72), with the step (71) located inside the opening lever (81); When the steering shaft (6) and the reducer (1) are coaxial, there is a distance between the opening lever (81) and the step (71). When the scraper (5) is located at the junction of the pipe and the elbow, the pilot arm (8) located outside the elbow swings inward and the opening lever (81) abuts against the step (71). An adjusting pad (711) is connected to the step (71) by a countersunk bolt.

2. The pigging bend deformation structure according to claim 1, characterized in that: The support assembly (3) includes a column (34), which is fixedly connected to a reducer (1). A compression spring A (33) is welded to the outer end face of the column (34), and a wheel frame (32) is welded to the outer end face of the compression spring A (33). A support wheel (31) is rotatably connected to the outer side of the wheel frame (32).

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