Intelligent pipeline powdery material conveying and automatic monitoring system and method

Abstract

The invention discloses an intelligent pipeline powdery material conveying and automatic monitoring system. The system comprises a powder storage device, an automatic metering and conveying device, a feeding device, a double-layer pipeline conveying device, a pipeline driving device, a lubricating and cooling system, a detection system and a powder bin. The double-layer pipeline conveying device comprises an inner shell pipeline and an outer shell pipeline; a plurality of spiral blades are arranged on the inner side pipe wall of the inner shell pipeline; the length of the outer shell pipeline is smaller than that of the inner shell pipeline, and the end of the outer shell pipeline is rotationally connected with the outer wall of the inner shell pipeline through an annular rotary sealing structure. The pipeline driving device can drive the inner shell pipeline to rotate relative to the outer shell pipeline; the lubricating and cooling system comprises lubricating and cooling liquid, a liquid conveying pump and a heat dissipation device. The detection system is arranged on one side of the double-layer pipeline conveying device; the invention further discloses a corresponding conveying method. And the device can be applied in a scene with a strict material granularity requirement or a strict moisture requirement, and is good in safety and convenient for later maintenance.

Description

Technical Field

[0001] The present invention relates to the field of powder material transportation, and in particular to a device and method for intelligent pipeline transportation of powder materials and automatic monitoring. Background Art

[0002] Traditionally, long-distance transportation of powdered materials is generally carried out by hydraulic transportation through pipelines. For hydraulic transportation through pipelines, the conventional practice is to prepare the powdered materials into a mixed slurry at the head end. The particle size must be small and have a certain gradation. The upper limit of the particle size is generally not more than 3 mm. After the slurry has a certain stability, it is then transported by pressurizing the pump and then dehydrated after being transported to the terminal. This technology consumes a lot of power when the slurry is crushed or ground at the head end. After the material is transported to the terminal, the fine particles need to be dehydrated to meet the needs of users. On the one hand, the existing technology increases engineering investment and operating energy consumption, which is not conducive to energy saving and carbon reduction. On the other hand, in order to meet the conditions for transportation, the necessary crushing and grinding change the physical state of the material. In some scenarios where there are requirements for material particle size or strict moisture requirements, it cannot meet the application requirements, such as coking coal, power plant coal, etc. Summary of the invention

[0003] In view of the problems or defects in the prior art, the present invention aims to solve the problem that the long-distance transportation of traditional powdered materials in the prior art cannot meet the application requirements in some scenarios with strict requirements on material particle size or moisture.

[0004] The scheme of the present invention is as follows: an intelligent pipeline powder material conveying and automatic monitoring system, comprising: a powder material storage device, an automatic metering and conveying device, a feeding device, a double-layer pipeline conveying device, a pipeline driving device, a lubrication and cooling system, a detection system and a powder material bin;

[0005] The automatic metering and conveying device is arranged below the powder storage device, and conveys the powder material to the inlet of the feeding device, and the feeding device conveys the powder material to the feeding end of the double-layer pipe conveying device;

[0006] The double-layer pipeline feeding device comprises an inner shell pipeline and an outer shell pipeline; the inner tube wall of the inner shell pipeline is provided with a plurality of spiral blades at intervals along the longitudinal direction; a plurality of ball grooves protruding outward are fixedly provided on the outer tube wall of the inner shell pipeline, a plurality of through holes are opened on the outer walls on both sides of each ball groove and a plurality of balls are arranged in the groove, the outer shell pipeline is sleeved on the outside of the inner shell pipeline and supported by the rolling balls; the length of the outer shell pipeline is shorter than that of the inner shell pipeline, and the end of the outer shell pipeline is rotatably connected to the outer wall of the inner shell pipeline through an annular rotating sealing structure; the pipeline driving device is provided on one side of the end of the inner shell pipeline, and the pipeline driving device can drive the inner shell pipeline to rotate relative to the outer shell pipeline;

[0007] The lubricating and cooling system includes a lubricating and cooling liquid, a liquid delivery pump and a heat sink; the lubricating and cooling liquid is arranged between the inner shell pipeline and the outer shell pipeline and is connected to the liquid delivery pump and the heat sink through a pipeline;

[0008] The detection system is arranged in parallel on one side of the double-layer pipeline conveying device;

[0009] The powder bin is arranged at the discharge port of the inner shell pipeline;

[0010] Furthermore, the powder storage device comprises a funnel-shaped powder bin, a gate plate arranged at the lower part of the powder bin, and an under-bin vibrating feeding device arranged at the outlet end of the powder storage device.

[0011] Furthermore, the automatic metering and conveying device is a metering belt scale.

[0012] Furthermore, the feeding device is a feeding hopper.

[0013] Furthermore, the pipeline driving device includes a gear structure fixed on the outer wall of the inner shell pipeline and a driving device.

[0014] Furthermore, the detection system includes a No. 1 online monitoring system, a pipeline accompanying monitoring optical cable and a No. 2 online monitoring system; the pipeline accompanying monitoring optical cable is arranged along one side of the double-layer pipeline material conveying device and multiple sensors are arranged on it, and the No. 1 online monitoring system and the pipeline accompanying monitoring optical cable are arranged at both ends of the pipeline accompanying monitoring optical cable.

[0015] Furthermore, a conductive device is provided on the outer wall of the inner shell pipeline, and the end of the conductive device in contact with the outer wall is a conductive metal roller. A conductive rod is provided at the central axis of the metal roller, and the conductive rod is grounded to conduct the charge accumulated during the operation of the inner shell pipeline into the earth.

[0016] Furthermore, a material guide hopper is fixedly provided at the head end of the inner shell pipe. The material guide hopper is a hollow truncated cone structure without spiral blades inside; its outer side is open and serves as an inlet for powdered materials.

[0017] Furthermore, the number N of the spiral blades distributed in the longitudinal direction is determined by the following formula:

[0018]

[0019] Q: Required material delivery rate;

[0020] φ: Filling factor, which indicates the filling degree of the material in the pipeline. It is a dimensionless coefficient between 0 and 1, and its value is determined based on the operating experience of different materials.

[0021] W: Width of spiral blade;

[0022] Lbefore : Horizontal length of spiral blade;

[0023] D: diameter of the inner shell pipe;

[0024] θ: helix angle, whose tangent value indicates the inclination of the helix;

[0025] ω: angular velocity of the spiral blade;

[0026] N: The number of spiral blades required to ensure the required conveying rate is achieved without exceeding the maximum power of the motor;

[0027] P max: maximum power of the motor;

[0028] μ: The friction coefficient between the material and the spiral blade is a dimensionless coefficient;

[0029] ρ: density of material;

[0030] g: acceleration due to gravity.

[0031] Furthermore, the number of the spiral blades is an even number of 4, 6, 8..., and they are evenly spaced in the longitudinal direction inside the pipeline. The cross-sectional height h of the spiral blades is between 1 / 5 and 1 / 4 of the inner shell pipeline R, and the cross-sectional width K of the spiral blades is 4 to 5 times the maximum particle size of the transported powdered material.

[0032] As another aspect of the present invention, it also relates to a method for conveying powdered materials using an intelligent pipeline and an automatic monitoring system, comprising the following steps:

[0033] Step 1, testing and storage: After the system is installed, the no-load linkage test is first carried out. This process tests whether each system equipment is operating normally, especially the power unit. During the no-load operation, test whether the operating torque and the operating signal of the online monitoring system are normal; after the pipeline is operating normally, maintain the normal operation state;

[0034] Step 2, release control: by operating the gate, the release of the powdered material from the powder storage device is precisely controlled;

[0035] Step 3, feeding: using the vibrating feeding device under the bin to evenly feed the released powdered material into the automatic metering and conveying device;

[0036] Step 4: Measuring: Use a measuring belt scale to accurately measure the mass of the powdered material to ensure that the amount of material during the conveying process meets the predetermined requirements;

[0037] Step 5, conveying to the feeding end: feeding the measured powdered material into the feeding end of the double-layer pipe feeding device through the feeding funnel;

[0038] Step 6, pipeline rotation driving: driving the inner shell pipeline to rotate relative to the outer shell pipeline through the pipeline driving device. The driving device includes a driving gear meshing with a gear structure on the outer wall of the inner shell pipeline, thereby realizing the rotation of the inner shell pipeline;

[0039] Step 7, material transportation: during the rotation of the inner shell pipeline, the powdered material is transported along the pipeline to the destination through the spiral blades arranged on the inner wall thereof;

[0040] Step 8, Lubrication and Cooling: During the transportation process, the lubrication and cooling system is used to lubricate and cool the rotating inner shell pipe to maintain efficient operation of the system and prevent explosion or fire;

[0041] Step 9, operation status monitoring: The operation status of the double-layer pipeline conveying device is continuously monitored through the detection system, including the online monitoring system and the pipeline accompanying monitoring optical cable, to ensure the stability and safety of the system. If the operation is abnormal or encounters external damage, the accompanying monitoring optical cable (10) of the dedicated pipeline will detect the signal and transmit it to the No. 1 online monitoring system or the No. 2 online monitoring system, so as to quickly locate and perform maintenance. During the operation, the electrostatic charge generated by the inner shell pipeline during the operation is introduced into the ground through the conductive device, including the metal roller and the grounded conductive rod, so as to prevent the accumulation of static electricity and ensure the safe operation of the system.

[0042] Step 10: Material unloading: The powdered material transported to the terminal station is unloaded through the powder silo.

[0043] The beneficial effects and features of the present invention are:

[0044] (1) The intelligent pipeline conveying powdered materials and automatic monitoring system of the present invention take into account the advantages of traditional hydraulic pipeline and belt conveyor transportation. Not using water as the conveying medium reduces the cost of water treatment and the waste of water resources, and also avoids the possibility of water pollution from the perspective of conveying process technology; pipeline transportation can be laid underground and does not occupy arable land. The transportation process is continuous, closed, safe and efficient, and can be widely used in industries such as coal, metallurgy, construction, and mining environmental management.

[0045] (2) The intelligent pipeline powder material transportation and automatic monitoring system of the present invention effectively avoids the disadvantages of the traditional hydraulic material transportation such as the first-end crushing and grinding that increase energy consumption. It ensures stable, continuous, low-carbon, closed, green and environmentally friendly material transportation without changing the physical state of the solid powder material. It can be used in scenarios where there are requirements for material particle size or strict requirements for moisture.

[0046] (3) The intelligent pipeline powder material transportation and automatic monitoring system of the present invention, by providing a lubrication cooling system and a conductive device, avoids the generation of a large amount of heat during the material transportation process, and promptly conducts away the static charge generated during the friction process, thereby greatly reducing the risk of fire or explosion.

[0047] (4) The intelligent pipeline powder material conveying and automatic monitoring system of the present invention adopts the intermittent design of multiple spiral blades. When one of the spiral blades is damaged, it can be repaired or replaced individually in a modular manner, thereby improving the efficiency of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall system structure of a preferred embodiment of the present invention;

[0049] Figure 2 is a cross-sectional view of a double-layer pipeline material conveying device according to a preferred embodiment of the present invention;

[0050] Figure 3 It is a three-dimensional structural schematic diagram of a double-layer pipeline material conveying device of a preferred embodiment of the present invention (part of the outer shell pipeline is uncovered);

[0051] Figure 4 It is a three-dimensional structural schematic diagram of a double-layer pipeline material conveying device from another angle of a preferred embodiment of the present invention;

[0052] Figure 5 is a schematic diagram of the three-dimensional structure of a conductive device in a preferred embodiment of the present invention;

[0053] Figure 6 1 is a schematic diagram of the three-dimensional structure of the guide hopper of a preferred embodiment of the present invention (only part of the structure at the end is shown);

[0054] The reference numerals in the figure represent respectively: 1-powder silo, 2-gate, 3-vibrating feeding device, 4-metering belt scale, 5-gear structure, 6-driving device, 7-feeding end, 8-feeding funnel, 9-No. 1 online monitoring system, 10-pipeline accompanying monitoring optical cable, 11-No. 2 online monitoring system B, 12-powder silo, 13-outer shell pipeline, 14-spiral blade, 15-rolling steel ball, 16-inner shell pipeline, 17-lubricating cooling liquid, 18-liquid delivery pump, 19-heat dissipation device, 20-ball groove, 201-through hole, 21-conductive device, 22-rotating sealing structure, 23-guide hopper. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0058] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0059] Embodiment 1:

[0060] Please refer to Figure 1-Figure 2 , an embodiment of the present invention relates to an intelligent pipeline conveying powdered materials and automatic monitoring system, including: a powder storage device, an automatic metering and conveying device such as a metering belt scale 4, a feeding device, a double-layer pipeline conveying device, a pipeline driving device, a lubrication and cooling system, a detection system and a powder silo;

[0061] Specifically, the powder storage device includes a funnel-shaped powder silo 1, a gate plate 2 arranged at the lower part of the powder silo, and a vibrating feeding device 3 under the silo arranged at the outlet end of the powder storage device 1; an automatic metering and conveying device is arranged below the powder storage device, and conveys the powdered material to the inlet of the feeding device, and the feeding device feeds the powdered material into the feeding end 7 of the double-layer pipe conveying device; wherein the feeding device can be designed as a feeding funnel 8.

[0062] Please refer to Figure 2-Figure 4 The above-mentioned double-layer pipeline feeding device includes an inner shell pipeline 16 and an outer shell pipeline 13; during specific installation, various methods such as erection or burial can be selected; a plurality of spiral blades 14 are arranged at intervals along the longitudinal direction on the inner wall of the inner shell pipeline 16; the plurality of spiral blades 14 are arranged at intervals to facilitate the replacement and maintenance of a single spiral blade 14.

[0063] In some other embodiments, the spiral blades may not be arranged at intervals, but may be connected to form an integral spiral surface, forming a conventional spiral structure similar to an auger.

[0064] A plurality of ball grooves 20 protruding outward are fixedly arranged on the outer wall of the inner shell pipe 16, a plurality of through holes 201 are opened on the outer wall on both sides of each ball groove 17, and a plurality of balls 15 are arranged in the grooves, and the outer shell pipe 13 is sleeved on the outside of the inner shell pipe 16 and supported by the rolling balls 15; the length of the outer shell pipe 13 is shorter than that of the inner shell pipe, and its end is rotatably connected to the outer wall of the inner shell pipe 16 through an annular rotating sealing structure 22; wherein, in some preferred embodiments, the rotating seal may include a sliding ring made of polytetrafluoroethylene and a rubber O-ring providing elastic force, which may seal a rotating or swinging motion structure; the pipeline driving device is arranged on one side of the end of the inner shell pipe 16, and the pipeline driving device may drive the inner shell pipe 16 to rotate relative to the outer shell pipe 13;

[0065] The lubricating and cooling system includes a lubricating and cooling liquid 17, a liquid delivery pump 18 and a heat sink 19; the lubricating and cooling liquid 17 is arranged between the inner shell pipeline and the outer shell pipeline 13 and is connected to the liquid delivery pump 18 and the heat sink 19 through the pipeline. The lubricating and cooling liquid 17 circulates in the pipeline and takes away the heat generated during the operation of the inner shell pipeline 16 in time through the heat sink 19, thereby reducing the possibility of fire and ensuring operation safety;

[0066] The detection system is arranged in parallel on one side of the double-layer pipeline material conveying device, and is used for automatically monitoring and quickly locating the operating status or unexpected external damage of the double-layer pipeline material conveying device; specifically, the detection system includes a No. 1 online monitoring system 9, a pipeline accompanying monitoring optical cable 10 and a No. 2 online monitoring system 11; the pipeline accompanying monitoring optical cable 10 is arranged along one side of the double-layer pipeline material conveying device and a plurality of sensors are arranged on it, and the No. 1 online monitoring system 9 and the pipeline accompanying monitoring optical cable 10 are arranged at both ends of the pipeline accompanying monitoring optical cable 10.

[0067] The powder bin 12 is arranged at the discharge port of the inner shell pipe 16, and is used to receive the materials transported by the double-layer pipe conveying device through a spiral conveying method;

[0068] The pipeline driving device includes a gear structure 5 fixed on the outer wall of the inner shell pipeline 16 and a driving device 6 such as a motor or a diesel engine. The driving device is provided with a driving gear that matches the gear structure 5, and also includes a hydraulic coupling device, which can effectively protect the dedicated driving device during the process of stopping and restarting when the material is fully loaded.

[0069] In the above embodiment, the number N of spiral blades distributed in the longitudinal direction can be determined by the following formula:

[0070]

[0071] Q: Required material delivery rate;

[0072] φ: Filling factor, which indicates the filling degree of the material in the pipeline. It is a dimensionless coefficient between 0 and 1, and its value is determined based on the operating experience of different materials.

[0073] W: Width of spiral blade;

[0074] L before : Horizontal length of spiral blade;

[0075] D: diameter of the inner shell pipe;

[0076] θ: helix angle, whose tangent value indicates the inclination of the helix;

[0077] ω: angular velocity of the spiral blade;

[0078] N: The number of spiral blades required to ensure the required conveying rate is achieved without exceeding the maximum power of the motor;

[0079] P max: maximum power of the motor;

[0080] μ: The friction coefficient between the material and the spiral blade is a dimensionless coefficient;

[0081] ρ: density of material;

[0082] g: acceleration due to gravity.

[0083] According to the actual operation experience, the number of spiral blades 14 can be 4, 6, 8 ... an even number, and they are evenly spaced and spirally distributed in the longitudinal direction inside the pipeline. The cross-sectional height h of the spiral blades 14 is between 1 / 5 and 1 / 4 of the inner shell pipeline R, and the cross-sectional width K of the spiral blades 14 is 4 to 5 times the maximum particle size of the transported powdered material. The cross-sectional parameters are as follows: Figure 2 shown.

[0084] Embodiment 2:

[0085] Please refer to Figure 5 As a preferred solution, in some other embodiments, the difference from Embodiment 1 is that a conductive device 21 is further provided on the outer wall of the inner shell pipe 16, and one end of the conductive device in contact with the outer wall is a conductive metal roller 211, and a conductive rod 212 is provided at the central axis of the metal roller. The conductive rod 212 is grounded, and the charge accumulated by the friction between the powder and the spiral blades during the operation of the inner shell pipe 16 is introduced into the ground, thereby reducing the possibility of fire and explosion.

[0086] Embodiment 3:

[0087] Please refer to Figure 6As a preferred solution, in some other embodiments, the difference from Example 1 is that a guide hopper 23 is fixedly provided at the head end of the inner shell pipe 16. The guide hopper 23 is a hollow frustum-shaped structure, tilted inward from left to right (the tilt facilitates the material to slide down to the entrance of the inner shell pipe 16). No spiral blades are provided inside the guide hopper 23 to reduce the possibility of interference between the feeding funnel and the spiral blades; its outer side is open as an inlet for powdered materials.

[0088] Embodiment 4:

[0089] As a preferred solution, in some other embodiments, different from Embodiment 1, a dust collection hood can also be arranged around the periphery of the powder silo, and a closed dust collection space is formed between the dust collection hood and the powder silo, which is used to capture the dust generated by the powder silo during material unloading or storage; the lower end of the dust collection hood is connected to a dust filtering device, and the dust filtering device includes one or more high-efficiency filters and a dust collection container, which is used to collect and filter the dust in the dust collection space to ensure that the dust is not discharged into the external environment

[0090] Embodiment 5:

[0091] As a preferred solution, in some other embodiments, the difference from Example 1 is that due to the impact and sliding friction of the material on the blades near the discharge port, it is found from actual operation that the spiral blades near the discharge port are more severely worn than the spiral blades near the feed port. In some embodiments, wear-resistant coatings and wear-resistant welding rods can be added to the edges of the blades; the distribution of the spiral blades can also be divided into a front section and a rear section, the front section adopts a first-form spiral blade, and the rear section adopts a second-form spiral blade, wherein the first-form spiral blade has a smaller pitch and a larger inclination angle; the second-form spiral blade has a larger pitch and a smaller inclination angle, and the second-form spiral blade is used to gently convey the material in the later stage of conveying, reducing material crushing and wear of the spiral blades near the discharge port.

[0092] As another aspect of the embodiment of the present invention, it also relates to a method for conveying powdered materials using an intelligent pipeline and an automatic monitoring system, comprising the following steps:

[0093] Step 1, testing and storage: After the system is installed, the no-load linkage test is first carried out. This process tests whether each system equipment is operating normally, especially the power unit. During the no-load operation, test whether the operating torque and the operating signal of the online monitoring system are normal; after the pipeline is operating normally, maintain the normal operation state;

[0094] Step 2, release control: by operating the gate 2, the release of the powdery material from the powder storage device 1 is precisely controlled;

[0095] Step 3, feeding: using the vibrating feeding device 3 under the bin to evenly feed the released powdered material into the automatic metering and conveying device;

[0096] Step 4, metering: using a metering belt scale 4 to accurately measure the mass of the powdered material to ensure that the amount of material during the conveying process meets the predetermined requirements;

[0097] Step 5, conveying to the feeding end: feeding the measured powdered material into the feeding end 7 of the double-layer pipe feeding device through the feeding funnel 8;

[0098] Step 6, pipeline rotation driving: driving the inner shell pipeline 16 to rotate relative to the outer shell pipeline 13 through the pipeline driving device 6. The driving device includes a driving gear meshing with the gear structure 5 on the outer wall of the inner shell pipeline 16, thereby realizing the rotation of the inner shell pipeline;

[0099] Step 7, material transportation: during the rotation of the inner shell pipe 16, the powdered material is transported along the pipe to the destination through the spiral blades 14 arranged on the inner wall thereof;

[0100] Step 8, lubrication and cooling: During the transportation process, the rotating inner shell pipe 16 is lubricated and cooled by the lubrication and cooling system to maintain efficient operation of the system and prevent explosion or fire;

[0101] Step nine, operation status monitoring: the operation status of the double-layer pipeline conveying device is continuously monitored through the detection system, including the online monitoring system and the pipeline accompanying monitoring optical cable, to ensure the stability and safety of the system. During the operation, the electrostatic charge generated by the inner shell pipeline 16 during the operation is introduced into the ground through the conductive device 21, including the metal roller 211 and the grounded conductive rod 212, to prevent the accumulation of static electricity and ensure the safe operation of the system;

[0102] Among them, in normal operating status, after the pipeline runs normally without load, slowly add materials; after draining the materials, carry out planned parking.

[0103] In abnormal operating conditions, when the pipeline is overloaded, stop continuous feeding; through the hydraulic coupling system, ensure that the system will not be overloaded. After maintenance, empty the material and carry out planned parking.

[0104] Step ten, material unloading: the powdered material transported to the terminal station is unloaded through the powder silo 12 .

[0105] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent pipeline powder material conveying and automatic monitoring system, characterized in that: It includes a powder storage device, an automatic metering and conveying device, a feeding device, a double-layer pipeline conveying device, a pipeline driving device, a lubrication and cooling system, a detection system and a powder silo; The automatic metering and conveying device is arranged below the powder storage device and conveys the powder material to the inlet of the feeding device, and the feeding device conveys the powder material to the feeding end (7) of the double-layer pipe conveying device; The double-layer pipeline conveying device comprises an inner shell pipeline (16) and an outer shell pipeline (13); a plurality of spiral blades (14) are arranged on the inner tube wall of the inner shell pipeline (16) at intervals in the longitudinal direction; a plurality of ball grooves (20) protruding outward are fixedly arranged on the outer tube wall of the inner shell pipeline (16); a plurality of through holes (201) are opened on the outer walls on both sides of each ball groove (17) and a plurality of balls (15) are arranged in the groove; the outer shell pipeline (13) is sleeved on the outside of the inner shell pipeline (16) and supported by the rolling balls (15); the length of the outer shell pipeline (13) is shorter than that of the inner shell pipeline, and the end of the outer shell pipeline (13) is rotatably connected to the outer wall of the inner shell pipeline (16) through an annular rotating sealing structure (22); the pipeline driving device is arranged on one side of the end of the inner shell pipeline (16), and the pipeline driving device can drive the inner shell pipeline (16) to rotate relative to the outer shell pipeline (13); The lubricating and cooling system comprises a lubricating and cooling liquid (17), a liquid delivery pump (18) and a heat dissipation device (19); the lubricating and cooling liquid (17) is arranged between the inner shell pipeline and the outer shell pipeline (13) and is connected to the liquid delivery pump (18) and the heat dissipation device (19) through the pipeline; The detection system is arranged on one side of the double-layer pipeline conveying device; The powder bin (12) is arranged at the discharge port of the inner shell pipe (16).

2. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: The powder material storage device comprises a funnel-shaped powder material bin (1), a gate plate (2) arranged at the bottom of the powder material bin, and an under-bin vibrating feeding device (3) arranged at the outlet end of the powder material storage device (1).

3. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: The automatic metering and conveying device is a metering belt scale (4).

4. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: The pipeline driving device comprises a gear structure (5) fixed on the outer wall of the inner shell pipeline (16) and a driving device (6), wherein the driving device is provided with a driving gear matched with the gear structure (5).

5. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: The detection system comprises a No. 1 online monitoring system (9), a pipeline accompanying monitoring optical cable (10) and a No. 2 online monitoring system (11); the pipeline accompanying monitoring optical cable (10) is arranged along one side of the double-layer pipeline conveying device and a plurality of sensors are arranged on the cable; the No. 1 online monitoring system (9) and the pipeline accompanying monitoring optical cable (10) are arranged at both ends of the pipeline accompanying monitoring optical cable (10).

6. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: A conductive device (21) is also provided on the outer wall of the inner shell pipe (16); one end of the conductive device in contact with the outer wall is a conductive metal roller (211); a conductive rod (212) is provided at the central axis of the metal roller; the conductive rod (212) is grounded to conduct the electric charges accumulated during the operation of the inner shell pipe (16) to the ground.

7. The intelligent pipeline powder material conveying and automatic monitoring system according to claim 1 is characterized in that: A material guide hopper (23) is fixedly arranged at the head end of the inner shell pipe (16). The material guide hopper (23) is a hollow truncated cone structure without spiral blades arranged inside; its outer side is open and serves as an inlet for powdered materials.

8. The intelligent pipeline powder material conveying and automatic monitoring system according to any one of claims 1 to 7 is characterized in that: The number N of the spiral blades distributed in the longitudinal direction is determined by the following formula: Q: Required material delivery rate; φ: Filling factor, which indicates the filling degree of the material in the pipeline. It is a dimensionless coefficient between 0 and 1, and its value is determined based on the operating experience of different materials. W: Width of the spiral blade, i.e. the length of the spiral blade in the radial direction after the spiral surface of the spiral blade is unfolded into an arc surface; L before : Horizontal length of spiral blade; D: diameter of the inner shell pipe; θ: helix angle, whose tangent value indicates the inclination of the helix; ω: angular velocity of the spiral blade; N: The number of spiral blades required to ensure the required conveying rate is achieved without exceeding the maximum power of the motor; P max: maximum power of the motor; μ: The friction coefficient between the material and the spiral blade is a dimensionless coefficient; ρ: density of material; g: acceleration due to gravity.

9. The intelligent pipeline powder material conveying and automatic monitoring system according to any one of claims 1 to 7, characterized in that: The number of the spiral blades (14) is 4, 6, 8, ... an even number, and they are evenly spaced in the longitudinal direction inside the pipeline. The cross-sectional height h of the spiral blades (14) is between 1 / 5 and 1 / 4 of the inner shell pipeline R, and the cross-sectional width K of the spiral blades (14) is 4 to 5 times the maximum particle size of the transported powdered material.

10. A method for conveying powdered materials using an intelligent pipeline and an automatic monitoring system, characterized in that: The steps include: Step 1, testing and storage: After the system is installed, the no-load linkage test is first carried out. This process tests whether each system equipment is operating normally, especially the power unit. During the no-load operation, the operating torque and the operating signal of the online monitoring system are tested to see if they are normal. After the pipeline is operating normally, the normal operation state is maintained. The powdered material to be transported is placed in a powder storage device (1), which is funnel-shaped to ensure smooth flow of the material; Step 2: release control: accurately controlling the release of the powdery material from the powder storage device (1) by operating the gate (2); Step 3, feeding: using the vibrating feeding device (3) under the bin, the released powdered material is evenly fed into the automatic metering and conveying device; Step 4: Measuring: Using a measuring belt scale (4) to accurately measure the mass of the powdered material to ensure that the amount of material during the conveying process meets the predetermined requirements; Step 5, conveying to the feeding end: feeding the measured powdered material into the feeding end (7) of the double-layer pipeline feeding device through the feeding funnel (8); Step 6: Pipeline rotation driving: the inner shell pipeline (16) is driven to rotate relative to the outer shell pipeline (13) by a pipeline driving device (6); the driving device comprises a driving gear meshing with a gear structure (5) on the outer wall of the inner shell pipeline (16), thereby realizing the rotation of the inner shell pipeline; Step 7, material transportation: during the rotation of the inner shell pipe (16), the powdered material is transported along the pipe to the destination through the spiral blades (14) arranged on the inner wall thereof; Step 8, lubrication and cooling: During the transportation process, the rotating inner shell pipe (16) is lubricated and cooled by a lubrication and cooling system to maintain efficient operation of the system and prevent explosion or fire; Step nine, operation status monitoring: the operation status of the double-layer pipeline conveying device is continuously monitored through a detection system, including an online monitoring system and a pipeline accompanying monitoring optical cable, to ensure the stability and safety of the system. During operation, the electrostatic charge generated by the inner shell pipeline (16) during operation is introduced into the ground through a conductive device (21), including a metal roller (211) and a grounded conductive rod (212), to prevent static electricity accumulation and ensure the safe operation of the system; Step 10, material unloading: the powdered material transported to the terminal station is unloaded through the powder silo (12).

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