Tailing slurry pipeline conveying resistance reducing device

Abstract

The invention relates to the technical field of pipeline conveying, in particular to a tailing slurry pipeline conveying resistance reducing device which comprises a conveying pipe. The conveying pipe is characterized in that a high-pressure air inlet is formed in the outer pipe wall; a space between the inner pipe wall and the outer pipe wall is a high-pressure air passage; a plurality of gas film generation channels are formed in the inner pipe wall; the high-pressure air inlet is communicated with the high-pressure air passage; the plurality of high-frequency vibrators are uniformly arranged in the high-pressure air channel; micro-bubble flow generated by the micro-bubble generating mechanism and high-pressure gas in the high-pressure gas channel are sprayed out by attaching to the inner pipe wall through the gas film generating channel, and a water vapor gas film is formed. Micro bubbles formed by high-pressure gas and liquid are sprayed out in a manner of being attached to the inner pipe wall to form a water vapor film, so that contact between the pipe wall and the fluid can be reduced, internal friction resistance of mortar and boundary friction between the mortar and the pipe wall are improved, and conveying resistance of the pipeline is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of line maintenance, and in particular to a tailings slurry pipeline transportation drag reducing device. Background Art

[0002] Metal mines produce a large amount of tailings sand during the beneficiation process. Due to its small particle size and large output, the accumulation of tailings sand on the ground will cause serious environmental pollution. At the same time, metal mines will cause ground collapse during the mining process, damage farmland and ground buildings, and cause great economic losses to enterprises. In order to solve the above problems, the usual practice is to add an appropriate amount of cement to the tailings sand to make a cemented tailings mortar, and transport it through pipelines to achieve gravity flow to the underground goaf for filling. This approach solves the environmental pollution problem caused by the accumulation of tailings on the ground, and plays a role in supporting the roof of the goaf, preventing the surface from sinking and protecting ground buildings and farmland facilities. However, the following problems still exist: Since the mining depth of metal mines has now reached more than one kilometer, the underground horizontal pipelines are longer, the transportation resistance is large, the transportation efficiency is low, and the transportation pipelines are severely worn.

[0003] The existing Chinese authorized invention patent CN101275710A discloses a drag reduction pipeline for conveying high-viscosity crude oil, grease and chemical raw materials, belonging to the field of oil and gas transportation technology. The pipeline consists of an inner and outer pipe. The liquid or gas enters the outer surface of the inner pipe through the guide pipe, and then enters the pipe through the axial groove and the annular groove on the inner pipe. By changing the friction properties between the medium and the wall, the liquid-solid friction is changed to a liquid-solid and gas-solid mixed friction, which can reduce the friction resistance when conveying high-viscosity fluids such as crude oil, grease and chemical raw materials in the pipe, and greatly improve the transmission efficiency. However, it is not applicable to apply it to the conveying pipeline of the mining and filling system. First of all, considering the large friction between the tailings and the conveying pipeline, and the use intensity of the conveying pipeline, directly opening the groove on the pipeline will cause serious wear and tear, affecting its service life; in addition, the complex pipeline structure design increases the production cost and maintenance cost. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art that opening grooves on the conveying pipe wall will affect the service life and high cost of use, the main purpose of the present invention is to provide a tailings slurry pipeline transportation drag reduction device, which can extend the transportation distance, improve the transportation efficiency and reduce pipe wall wear by reducing the transportation resistance.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: a tailings slurry pipeline transportation drag reduction device, comprising a delivery pipe, wherein the delivery pipe comprises:

[0006] An outer tube wall having a high-pressure air inlet thereon;

[0007] The space between the inner tube wall and the outer tube wall is a high-pressure air channel; a plurality of air film generating channels are opened on the inner tube wall; and a high-pressure air inlet is connected to the high-pressure air channel;

[0008] A plurality of high-frequency vibrators are evenly arranged in the high-pressure air passage;

[0009] The microbubble generating mechanism is configured such that the microbubble flow and the high-pressure gas are ejected along the inner tube wall through the air film generating passage to form a water vapor air film.

[0010] The high frequency vibrator comprises:

[0011] A turntable is rotatably mounted on the inner tube wall via a vibrating bracket;

[0012] One end of the multiple telescopic vibration components is evenly arranged on the turntable along the radial direction, and the other end, when the turntable drives the multiple telescopic vibration components to rotate, contacts with the inner tube wall in turn, the multiple telescopic vibration components are squeezed and contracted, and the inner tube wall vibrates slightly.

[0013] The telescopic vibration assembly comprises:

[0014] The telescopic vibration assembly comprises:

[0015] A vibrating sleeve, one end of which is evenly arranged on the rotating disk along the radial direction;

[0016] A spring is formed and arranged in the vibration sleeve rod, one end of which is connected to the bottom of the vibration sleeve rod;

[0017] A sleeve rod, one end of which is disposed in the vibration sleeve and fixedly connected to the other end of the forming spring, and the other end of which extends out of the vibration sleeve;

[0018] The abutment block is fixedly arranged on the other end of the sleeve rod.

[0019] It also includes a vibration table, which is fixed on the inner tube wall, and the turntable is rotatably arranged on the vibration table through a vibration bracket.

[0020] The vibration table comprises:

[0021] A connecting plate, on which the rotating disc is rotatably mounted via a vibrating bracket;

[0022] An outer sleeve, the upper end of which is fixedly connected to the bottom of the connecting plate;

[0023] A vibration spring, one end of which is fixedly connected to the lower end of the outer sleeve, and the other end of which is connected to the inner tube wall;

[0024] The inner pipe has a lower end fixedly connected to the inner pipe wall, and an upper end extending into the outer sleeve and slidably connected to the inner wall of the outer sleeve; a plurality of water inlets are provided at the lower portion of the inner pipe, and the diameter of the water inlets is the same as the length of the vibration spring in a compressed state.

[0025] A plurality of electrode assemblies are evenly arranged in the high-pressure air channel, and both ends of the electrode assemblies are fixedly connected to the inner tube wall and the outer tube wall, respectively, and are located in front of each of the air film generating channels; each of the electrode assemblies comprises:

[0026] Two electrodes, both ends of which are respectively plugged into the first groove opened in the inner tube wall and the second groove opened in the outer tube wall; one electrode is an anode, which is electrically connected to the positive electrode of a power supply arranged outside the outer tube wall through an anode wire, and the other electrode is a cathode, which is electrically connected to the negative electrode of the power supply arranged outside the outer tube wall through a cathode wire.

[0027] The air film generating channel includes a corrugated tube connected to the inner tube wall; the diameter of the corrugated tube is one tenth of the diameter of the outer tube wall; the corrugated tube includes three arcs.

[0028] The telescopic vibration component is tilted, and the tilt angle ranges from 10° to 20°, and the telescopic vibration component does not contact the edge of the turntable; the abutment block is a sphere, and is rotatably connected to the other end of the sleeve rod.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the water vapor film generating channel can make the solid mixed fluid have a tendency to move toward the center of the conveying pipeline, and a small space can be formed at the outlet of the water vapor film generating channel. At the same time, the high-pressure gas passes through the water vapor film generating channel and is ejected close to the inner tube wall, so that a layer of water vapor film is formed on the inner tube wall, and when the solid mixed fluid moves toward the inner tube wall, the viscosity of the mixed fluid and the inner tube wall can be reduced. Moreover, a high-frequency vibrator is provided on the inner tube wall of the gas outlet of the water vapor film generating channel, which is conducive to the formation of tiny bubbles between the high-pressure gas and the liquid and gas, and can reduce the contact between the tube wall and the fluid, thereby improving the internal friction of the mortar and the boundary friction between the mortar and the tube wall, and reducing the pipeline transportation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the high frequency vibrator of the present invention;

[0032] Figure 3 It is a schematic cross-sectional structure diagram of the vibration table of the present invention in a stretched state;

[0033] Figure 4It is a schematic cross-sectional structure diagram of the vibration table of the present invention in a compressed state.

[0034] 1. Conveying pipe, 1-1. Outer pipe wall, 1-2. Inner pipe wall, 2. High-pressure airway, 3. High-frequency vibrator, 3-1. Turntable, 3-2. Vibrating sleeve, 3-3. Vibrating bracket, 3-4. Forming spring, 3-5. Resistance block, 4. Air film generating channel, 5. High-pressure air inlet, 6. Microbubble generating mechanism, 7. Vibrating table, 7-1. Connecting plate, 7-2. Outer sleeve, 7-3. Inner pipe, 7-4. Vibrating spring. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0036] Example:

[0037] See also Figure 1-4 A tailings slurry pipeline transportation drag reduction device includes a delivery pipe 1, the delivery pipe 1 includes an outer pipe wall 1-1, on which a high-pressure air inlet 5 is opened; an inner pipe wall 1-2, and the space between the inner pipe wall 1-1 and the outer pipe wall 1-1 is a high-pressure air channel 2; a plurality of air film generating channels 4 are opened on the side wall of the inner pipe 1-2; the high-pressure air inlet 5 is connected to the high-pressure air channel connection 2; a plurality of high-frequency vibrators 3 are evenly arranged in the high-pressure air channel 2; a micro-bubble generating mechanism 6, the micro-bubble flow and the high-pressure gas are ejected through the air film generating channel 4 against the inner pipe wall 1-2 to form a water vapor film. The water vapor film generating channel can make the solid mixed fluid have a tendency to move toward the center of the delivery pipeline, and a small range of true fast can be formed at the outlet of the water vapor film generating channel. At the same time, the high-pressure gas passes through the water vapor film generating channel and is ejected close to the inner pipe wall, so that a layer of water vapor film is formed on the inner pipe wall, and when the solid mixed fluid moves toward the inner pipe wall, the viscosity of the mixed fluid and the inner pipe wall can be reduced. Moreover, a high-frequency vibrator is provided on the inner pipe wall of the air outlet of the water vapor film generating channel, which is conducive to the formation of tiny bubbles between high-pressure gas and liquid and gas, and can reduce the contact between the pipe wall and the fluid, thereby improving the internal friction of the mortar and the boundary friction between the mortar and the pipe wall, and reducing the pipeline transportation resistance.

[0038] In order to prevent the tailings slurry from adhering to the inner tube 1-2, the high-frequency vibrator 3 performs high-frequency vibration under the vibration of the airflow. In order to achieve high-frequency vibration, the high-frequency vibrator 3 includes a turntable 3-1 and a plurality of telescopic vibration components. The turntable 3-1 is rotated on the side wall of the inner tube 1-2 through a vibration bracket 3-3; one end of the plurality of telescopic vibration components is respectively uniformly arranged on the turntable 3-1 along the radial direction. When the turntable 3-1 drives the plurality of telescopic vibration components to rotate, they contact the wall of the inner tube 1-2 in turn, and the plurality of telescopic vibration components are squeezed and contracted, and the wall of the inner tube 1-2 is slightly vibrated. In order to increase the frequency of vibration, the telescopic vibration components are tilted. Due to the formation of air vortices, the plurality of telescopic vibration components drive the turntable 3-1 to rotate faster through the vibration bracket 3-3. The tilt angle ranges from 10° to 20°, and the telescopic vibration components do not contact the edge of the turntable 3-1.

[0039] Each telescopic vibration assembly includes a vibration sleeve 3-2, one end of which is evenly arranged on the turntable 3-1 along the radial direction; a plurality of forming springs 3-4 are arranged in the vibration sleeve rod 3-2, one end of which is connected to the bottom of the vibration sleeve rod 3-2; a sleeve rod, one end of which is arranged in the vibration sleeve 3-2 and fixedly connected to the other end of the forming spring 3-4, and the other end extends out of the vibration sleeve 3-2; an abutment block 3-5 is arranged at the other end of the sleeve rod, and in order to reduce friction, a spherical and corrosion-resistant material is generally selected, and it is rotatably connected to the sleeve rod.

[0040] See also Figure 3-4 It can be seen that in order to further include a vibration table 7, the vibration table 7 is fixedly arranged on the inner tube wall 1-2, and the turntable 3-1 is rotatably arranged on the vibration table 7 through the vibration bracket 3-3; the vibration table 7 includes a connecting plate 7-1, and the turntable 3-1 is rotatably arranged on the connecting plate 7-1 through the vibration bracket 3-3; an outer sleeve 7-2, the upper end of which is fixedly connected to the bottom of the connecting plate 7-1; a vibration spring 7-4, one end of which is fixedly connected to the lower end of the outer sleeve 7-2, and the other end is connected to the inner tube wall 1-2; an inner pipe 7-3, the lower end of which is fixedly connected to the inner tube wall 1-2, the upper end extends into the outer sleeve 7-2, and is slidably connected to the inner wall of the outer sleeve 7-2; a plurality of water inlets are opened at the lower part of the inner pipe 7-3, and the diameter of the water inlet is the same as the length of the vibration spring 7-4 in a compressed state.

[0041] The microbubble generating mechanism 6 includes several groups of electrode assemblies, which are evenly arranged in the high-pressure airway 2, and their two ends are fixedly connected to the inner tube wall 1-2 and the outer tube wall 1-1, and are located in front of each of the air film generating channels 4; each of the electrode assemblies includes: two electrodes, whose two ends are respectively plugged into the first groove opened in the inner tube wall 1-2 and the second groove of the outer tube wall 1-1; one electrode is an anode, which is electrically connected to the positive pole of a power supply arranged outside the outer tube wall 1-1 through an anode wire, and the other electrode is a cathode, which is electrically connected to the negative pole of a power supply arranged outside the outer tube wall 1-1 through a cathode wire.

[0042] The air film generating channel 4 includes a corrugated tube 4-1, which is connected to the wall of the inner tube 1-2; the diameter of the corrugated tube 4-1 is one tenth of the diameter of the outer tube wall 1-1; the corrugated tube 4-1 includes three arc sections, which play the role of smooth entry, smooth change of direction and wall-adhering spraying. When the solid-liquid mixed fluid passes through the position of the air film generating channel 5, it will move along the first arc-shaped inner wall of the air film generating channel 5, and at the end of the first arc-shaped inner wall, it has a tendency to continue moving along the tangent of the first arc-shaped inner wall toward the center of the conveying pipeline. In this way, a small range of vacuum will be formed at the second arc-shaped inner wall and the third arc-shaped inner wall. At the same time, after passing through the air film generating channel 5, the high-pressure gas is sprayed close to the inner tube wall 2, forming a layer of air film on the inner tube wall 2. When the solid-liquid mixed fluid moves toward the inner tube wall 2, it will not directly touch the inner tube wall 2, but touch the air film first, reducing the viscosity of the solid-liquid mixed fluid and the inner tube wall 2. Moreover, a high-frequency vibrator 4 is provided on the inner tube wall 2 of the air outlet of the air film generating channel 5, which is conducive to the formation of tiny bubbles between high-pressure gas and liquid, and can reduce the contact between the tube wall and the fluid, thereby improving the internal friction of the mud and the boundary friction between the mud and the tube wall, and reducing the pipeline transportation resistance.

[0043] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] The above embodiments are merely examples of the present invention and do not limit the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A tailings slurry pipeline transport drag reduction device, comprising a transport pipe (1), characterized in that: The delivery pipe (1) comprises: An outer tube wall (1-1) is provided with a high-pressure air inlet (5); The space between the inner tube wall (1-2) and the outer tube wall (1-1) is a high-pressure air passage (2); a plurality of air film generating passages (4) are provided on the inner tube wall (1-2); the high-pressure air inlet (5) is connected to the high-pressure air passage (2); A plurality of high-frequency vibrators (3) are evenly arranged in the high-pressure air passage (2); The microbubble generating mechanism (6) is arranged in the high-pressure airway (2) and generates a microbubble flow. The microbubble flow and the high-pressure gas in the high-pressure airway (2) are ejected along the inner tube wall (1-2) through the air film generating channel (4) to form a water vapor air film.

2. A tailings slurry pipeline transportation drag reduction device according to claim 1, characterized in that: The high-frequency vibrator (3) comprises: A rotating disk (3-1) is rotatably mounted on the inner tube wall (1-2) via a vibrating bracket (3-3); One end of the multiple telescopic vibration components is evenly disposed on the rotating disk (3-1) along the radial direction, and the other end, when the rotating disk (3-1) drives the multiple telescopic vibration components to rotate, sequentially contacts the inner tube wall (1-2), the multiple telescopic vibration components are squeezed and contracted, and the inner tube wall (1-2) slightly vibrates.

3. A tailings slurry pipeline transportation drag reduction device according to claim 2, characterized in that: The telescopic vibration assembly comprises: A vibration sleeve (3-2), one end of which is evenly arranged on the rotating disk (3-1) along the radial direction; A spring (3-4) is formed and arranged in the vibration sleeve rod (3-2), with one end of the spring being in contact with the inner bottom of the vibration sleeve rod (3-2); A sleeve rod, one end of which is arranged in the vibration sleeve (3-2) and fixedly connected to the other end of the forming spring (3-4), and the other end of which extends out of the vibration sleeve (3-2); The resistance block (3-5) is arranged at the other end of the sleeve rod.

4. A tailings slurry pipeline transportation drag reduction device according to claim 2, characterized in that: It also comprises a vibration table (7), wherein the vibration table (7) is fixedly mounted on the inner tube wall (1-2), and the turntable (3-1) is rotatably mounted on the vibration table (7) via the vibration bracket (3-3).

5. A tailings slurry pipeline transportation drag reduction device according to claim 4, characterized in that: The vibration table (7) comprises: A connecting plate (7-1), the rotating disk (3-1) being rotatably arranged on the connecting plate (7-1) via a vibrating bracket (3-3); An outer sleeve (7-2), the upper end of which is fixedly connected to the bottom of the connecting plate (7-1); A vibration spring (7-4), one end of which is fixedly connected to the lower end of the outer sleeve (7-2), and the other end of which is connected to the inner tube wall (1-2); The inner pipe (7-3) has a lower end fixedly connected to the inner pipe wall (1-2), and an upper end extending into the outer sleeve (7-2) and slidably connected to the inner wall of the outer sleeve (7-2); a plurality of water inlets are provided at the lower portion of the inner pipe (7-3), and the diameter of the water inlets is the same as the length of the vibration spring (7-4) in a compressed state.

6. A tailings slurry pipeline transportation drag reduction device according to claim 1, characterized in that: The microbubble generating mechanism (6) comprises: A plurality of electrode assemblies are evenly arranged in the high-pressure air channel (2), and the two ends of the electrode assemblies are respectively fixedly connected to the inner tube wall (1-2) and the outer tube wall (1-1), and are located in front of each of the air film generating channels (4); each of the electrode assemblies comprises: Two electrodes, both ends of which are respectively plugged into a first groove provided in the inner tube wall (1-2) and a second groove provided in the outer tube wall (1-1); one electrode is an anode, which is electrically connected to a positive electrode of a power source arranged outside the outer tube wall (1-1) via an anode wire, and the other electrode is a cathode, which is electrically connected to a negative electrode of a power source arranged outside the outer tube wall (1-1) via a cathode wire.

7. A tailings slurry pipeline transportation drag reduction device according to claim 1, characterized in that: The air film generating channel (4) comprises a corrugated tube (4-1) which is connected to the inner tube wall (1-2); the diameter of the corrugated tube (4-1) is one tenth of the diameter of the outer tube wall (1-1); and the corrugated tube (4-1) comprises three circular arcs.

8. A tailings slurry pipeline transportation drag reduction device according to claim 3, characterized in that: The telescopic vibration component is tilted, the tilt angle range is 10°-20°, and the telescopic vibration component does not contact the edge of the turntable (3-1); The abutment block (3-5) is a sphere and is rotatably connected to the other end of the sleeve rod.

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