CN118067574A - Experimental system and method for measuring flow characteristics of mineral aggregate in vibrating vertical conveying pipeline - Google Patents
Experimental system and method for measuring flow characteristics of mineral aggregate in vibrating vertical conveying pipeline Download PDFInfo
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- 239000007924 injection Substances 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 53
- 238000011084 recovery Methods 0.000 claims abstract description 26
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- 238000001914 filtration Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 26
- 230000003139 buffering effect Effects 0.000 claims description 22
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 13
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- 238000012546 transfer Methods 0.000 claims description 11
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
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Abstract
The invention discloses an experimental system and method for measuring flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline, which belong to the field of deep sea mining and mainly comprise a vibrating table module, a flow circulation module in a pipe, a mineral aggregate injection and recovery module and an image acquisition and analysis module. The vibration table module is used for driving transverse vibration of the vertical transparent mineral aggregate conveying pipeline; the in-pipe flow circulation module is used for conveying liquid moving in the pipeline; the mineral aggregate injection and recovery module is used for releasing and recovering mineral aggregate particles in the experimental process; the image acquisition and analysis module analyzes and processes the experimental image by means of the experimental image obtained by the high-speed camera so as to obtain the movement characteristics of mineral aggregate particles. The invention aims to obtain the movement characteristics of mineral aggregate particles in a vibrating vertical conveying pipeline through an experimental method.
Description
Technical Field
The invention belongs to the field of deep sea mining, and particularly relates to an experimental system and method for measuring flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline.
Background
In the development of deep-sea mineral resources, the mining system combining a mineral collector and vertical conveying pipeline lifting has the most development prospect. The vertical conveying pipeline is a key technical link, coarse particles are in two-phase internal flow in the conveying pipeline, and transverse vibration caused by vortex-induced vibration and the like is arranged outside the conveying pipeline, so that no accurate and complete theoretical and numerical simulation scheme exists at present for the novel complex system. The experimental system and the method for measuring the flow characteristics of the mineral aggregate in the vibration vertical conveying pipeline are beneficial to breaking through the technical bottleneck of fluid-solid coupling of the deep sea mining engineering structure system by means of an experimental means, have important scientific significance and have clear application prospect.
Disclosure of Invention
In order to solve the technical problems, the invention provides an experimental system and an experimental method for measuring the flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline. The vibration table module is used for driving transverse vibration forming a vertical conveying pipeline; the in-pipe flow circulation module is used for conveying the movement of the liquid in the pipeline; the mineral aggregate injection and recovery module is used for releasing and recovering mineral aggregate particles in the test process; the image acquisition and analysis module analyzes and processes the experimental image obtained by the high-speed camera aiming at the image so as to obtain the movement characteristics of mineral aggregate particles. The invention aims to obtain the movement characteristics of mineral aggregate particles in a vibrating vertical conveying pipeline through a test method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline comprises a vibrating table module, a flow circulation module in a pipe, a mineral aggregate injection and recovery module and an image acquisition and analysis module; the vibrating table module comprises a hydraulic actuator, a vibrating platform, a platform sliding rail, a platform base and a supporting structure; the in-pipe flow circulation module comprises a water storage tank, a stainless steel centrifugal water pump, a water pump frequency converter, a flowmeter, a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow, a water receiving tank and a reflux pipeline; the mineral aggregate injection and recovery module comprises a hot start mineral aggregate injection device and a mineral aggregate buffering and recovery filtering device;
The vibration platform is arranged on a platform sliding rail above the platform base, and the hydraulic actuator is connected with the vibration platform; the vertical transparent mineral aggregate conveying pipeline and the supporting structure are vertically fixed above the vibration platform, and the hydraulic actuator drives the vibration platform and the vertical transparent mineral aggregate conveying pipeline above the vibration platform to perform high-frequency reciprocating motion to a large extent and is used for driving the transverse vibration forming the vertical transparent mineral aggregate conveying pipeline; the water for the experimental system sequentially flows through a water storage tank, a stainless steel centrifugal water pump, a flowmeter, a hot start mineral aggregate injection device, a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow, a water receiving tank and a reflux pipeline, and finally flows into a mineral aggregate buffering, recycling and filtering device; the mineral aggregate injection and recovery module is used for injecting and recovering mineral aggregate particles in the experimental process; the image acquisition and analysis module analyzes and processes the experimental image by means of the experimental image obtained by the high-speed camera so as to obtain the movement characteristics of mineral aggregate particles.
Further, the experimental system performs injection, filtration and recovery of mineral aggregate particles under the conditions of transverse high-frequency vibration of the vertical transparent mineral aggregate conveying pipeline and adjustable conveying flow in the vertical transparent mineral aggregate conveying pipeline, so as to realize measurement and analysis of the motion characteristics of the mineral aggregate particles with different particle diameters in the vertical transparent mineral aggregate conveying pipeline; the high frequency is at most 2 Hz; the maximum adjustable conveying flow rate is 130 cubic meters per hour; the particle size of the mineral aggregate particles is 1-4 cm.
Further, the transverse vibration energy absorbing device comprises two metal expansion joints, the two metal expansion joints are fixedly arranged on a sliding table of the bench supporting structure in series, one metal expansion joint is connected with the hot start mineral aggregate injection device, the other metal expansion joint is perpendicular to the vertical transparent mineral aggregate conveying pipeline and is connected to an elbow flange below the vertical transparent mineral aggregate conveying pipeline.
Furthermore, the mineral aggregate injection and recovery module is used for injecting mineral aggregate particles with the diameter of 1-4 cm into the experimental system, and the mineral aggregate buffering, recovering and filtering device is arranged in the water storage tank, so that the damage to the water pump caused by the crushing of the mineral aggregate particles is avoided.
Further, the mineral aggregate buffering, recycling and filtering device is arranged on the metal sliding rail of the water storage tank, so that the mineral aggregate buffering, recycling and filtering device can be conveniently pushed to move transversely along the metal sliding rail, and mineral aggregate can be recycled at the position far away from the outlet of the backflow pipeline.
Further, the hot start mineral aggregate injection device is provided with a mineral aggregate bin and an injection channel, and the top of the hot start mineral aggregate injection device is provided with a quick-release sealing cover and a release valve; after the vertical transparent mineral aggregate conveying pipeline transversely vibrates and the in-pipe flow circulation module starts to operate, firstly closing a release valve of the hot start mineral aggregate injection device, filling a mineral aggregate bin with liquid water, putting mineral aggregate particles to be tested into the mineral aggregate bin, and closing a quick-release sealing cover at the top; and then opening a release valve of the hot start mineral aggregate injection device, allowing mineral aggregate particles to enter a horizontal main pipeline of the flow circulation module in the pipe through the injection channel, measuring the movement characteristics of the mineral aggregate particles when the mineral aggregate particles flow into the vertical transparent mineral aggregate conveying pipeline, and then closing the release valve.
Further, when the hydraulic actuator drives the vibration platform and the vertical transparent mineral aggregate conveying pipeline above the vibration platform to transversely vibrate, the other metal expansion joint connected with the lower part of the vertical transparent mineral aggregate conveying pipeline and the metal expansion joint connected in series simultaneously stretch and shrink, so that the transmission of the transverse vibration to the hot-start mineral aggregate injection device is eliminated.
Further, the inner wall of the mineral aggregate buffering, recycling and filtering device is attached with an organic buffer layer, and water filtering holes are chiseled in the inner wall and the organic buffer layer.
Further, the image acquisition and analysis module comprises a soft light plate and a light supplementing lamp which are sequentially arranged at the rear of the experimental system and used for providing uniform background light, and a high-speed CMOS (complementary metal oxide semiconductor) camera which is arranged at the front of the experimental system and used for obtaining a refined motion measurement image of mineral aggregate in a vertical transparent mineral aggregate conveying pipeline; and carrying out Hough transformation on the shot undistorted particle image by adopting a calculation program to obtain the boundary of the spherical particles, the pixel value of the diameter of each spherical particle and the two-dimensional coordinate of each spherical particle.
The invention also provides an experimental method for measuring the flow characteristics of mineral aggregate in the vibrating vertical conveying pipeline, which comprises the following steps:
Step 1, injecting 70% volume of liquid water into a water storage tank;
Step 2, turning on a power supply of the hydraulic actuator, the stainless steel centrifugal water pump, the water pump frequency converter, the flowmeter and the light supplementing lamp;
Step 3, starting a water pump frequency converter, and increasing step by step until a preset flow is achieved;
Step 4, turning on a high-speed camera to start recording flow state change of an observation section of the vertical transparent mineral aggregate conveying pipeline;
Step5, closing a release valve of the hot-start mineral aggregate injection device, opening a quick-release sealing cover at the top, filling a mineral aggregate bin with liquid water, placing mineral aggregate particles to be tested into the mineral aggregate bin, and closing the quick-release sealing cover at the top; then opening a release valve of the hot start mineral aggregate injection device, enabling mineral aggregate particles to enter a horizontal main pipeline of the flow circulation module in the pipe, and then closing the release valve;
Step 6, mineral aggregate particles enter a mineral aggregate buffering, recycling and filtering device of the water storage tank through a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow pipe, a water receiving tank and a backflow pipeline;
step 7, after the experiment is finished, closing the high-speed camera, and performing data post-processing;
Step 8, gradually reducing the frequency converter of the water pump to 0Hz, and finally stopping flowing the liquid flowing in the pipe through the circulating module;
Step 9, closing a power supply of the hydraulic actuator, the stainless steel centrifugal water pump, the water pump frequency converter, the flowmeter and the light supplementing lamp;
and step 10, obtaining mineral aggregate particles recovered by the mineral aggregate buffering recovery filtering device.
The beneficial effects are that:
1. According to the invention, the injection, filtration and recovery of mineral aggregate particles can be realized under the conditions of high-frequency vibration of the vertical conveying pipeline and circular flow in the pipeline, and the measurement and analysis of the movement characteristics of the mineral aggregate particles with different particle diameters in the pipeline are realized.
2. In order to effectively offset the adverse effect of the transverse vibration on the impact of the circulating system, the invention is provided with the transverse vibration energy absorbing device, so that the friction is reduced, the flexible degree of freedom is limited, the service life of the device is prolonged, and the effect of the transverse vibration can be effectively eliminated.
3. According to the invention, the mineral aggregate buffering, recycling and filtering device is arranged in the water storage tank, so that experimental mineral aggregate can be conveniently recycled, the possibility of mineral aggregate crushing is reduced to the maximum extent, and the damage to the water pump is avoided.
4. The conventional feeding device often needs to inject mineral aggregate before the circulation system is started, and then the circulation system is started. The invention is provided with the devices such as the mineral aggregate bin, the injection channel and the like, and the top is provided with the quick-release sealing cover and the release valve, so that the injection of mineral aggregate can be conveniently realized under the running condition of a circulating system, and meanwhile, the influence on the pipeline flow state in the injection process can be effectively reduced.
Drawings
FIG. 1 is a schematic illustration of an experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer tube in accordance with the present invention;
FIG. 2 is a schematic diagram of a lateral vibration energy absorber;
FIG. 3 is a schematic diagram of a mineral aggregate buffering recovery filter device;
Fig. 4 is a schematic diagram of a hot start mineral aggregate injection device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, an experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline comprises a vibrating table module, a flow circulation module in a pipe, a mineral aggregate injection and recovery module and an image acquisition and analysis module. The vibration table module is used for driving transverse vibration of the vertical transparent mineral aggregate conveying pipeline; the in-pipe flow circulation module is used for conveying liquid and forming circulating flow of the liquid in the pipeline; the mineral aggregate injection and recovery module is used for injecting and recovering mineral aggregate particles in the experimental process; the image acquisition and analysis module analyzes and processes the experimental image by means of the experimental image obtained by the high-speed camera so as to obtain the movement characteristics of mineral aggregate particles. According to the invention, the motion characteristics of mineral aggregate particles in the vibrating vertical conveying pipeline are obtained through an experimental method.
Specifically, the vibrating table module comprises a hydraulic actuator 1, a vibrating platform 2, a platform sliding rail 3, a platform base 4 and a supporting structure 5. The vibration platform 2 is arranged on a platform sliding rail 3 above a platform base 4, and the hydraulic actuator 1 is connected with the vibration platform 2. The vertical transparent mineral aggregate conveying pipeline 12 and the supporting structure 5 are vertically fixed above the vibration platform 2, the lower end of the vertical transparent mineral aggregate conveying pipeline is connected with the elbow flange 17, and the upper part of the supporting structure 5 is fixedly connected with the vertical transparent mineral aggregate conveying pipeline 12. The hydraulic actuator 1 is capable of driving the vibrating platform 2 and the vertical transparent mineral aggregate conveying pipeline 12 above the vibrating platform to reciprocate at a high frequency (up to 2 hz).
The in-pipe flow circulation module comprises a water storage tank 6, a stainless steel centrifugal water pump 7, a water pump frequency converter 8, a flowmeter 9, a transverse vibration energy absorbing device 11, a vertical transparent mineral aggregate conveying pipeline 12, an upper bent pipe 13, a water receiving tank 14 and a backflow pipeline 15. The experimental water sequentially flows through the water storage tank 6, the stainless steel centrifugal water pump 7, the flowmeter 9, the hot start mineral aggregate injection device 10, the transverse vibration energy absorbing device 11, the elbow flange 17, the vertical transparent mineral aggregate conveying pipeline 12, the upper elbow 13, the water receiving tank 14 and the reflux pipeline 15, and finally flows into the mineral aggregate buffering, recycling and filtering device 16. The output power of the stainless steel centrifugal water pump 7 is controlled by using the water pump frequency converter 8, so that the flow in the pipe is regulated. The experimental water is common liquid water, and the flow circulation module in the pipe can realize the conveying capacity of 130 cubic meters per hour at most.
As shown in fig. 2, the transverse vibration energy absorbing device 11 is provided with two metal expansion joints 18, the two metal expansion joints 18 are fixedly arranged on a sliding table 20 of a bench supporting structure 19 in series, one metal expansion joint 18 is connected with the hot start mineral aggregate injecting device 10, and the other metal expansion joint 18 is connected with an elbow flange 17 below the transparent mineral aggregate conveying pipeline 12. When the hydraulic actuator 1 drives the vibration platform 2 and the vertical transparent mineral aggregate conveying pipeline 12 above the vibration platform to transversely vibrate, the other metal expansion joint 18 connected below the vertical transparent mineral aggregate conveying pipeline 12 and the metal expansion joint 18 connected in series simultaneously stretch and shrink, so that the transmission of transverse vibration to the hot-start mineral aggregate injection device 10 is effectively eliminated. Meanwhile, as the two metal expansion joints 18 are fixed above the sliding table 20, the arrangement can control the stretching and shrinkage deformation of the metal expansion joints in the vibration direction, and the service life of the expansion joints can be effectively prolonged.
The mineral aggregate injection and recovery module includes a hot start mineral aggregate injection device 10 and a mineral aggregate buffer recovery filter device 16. The mineral aggregate injecting and recycling module is mainly used for injecting mineral aggregate particles with the diameter of 1-4 cm into an experimental system, and in order to avoid damage to a water pump caused by collision and crushing of mineral aggregate under the condition of high-flow transmission, a mineral aggregate buffering, recycling and filtering device 16 is arranged in the water storage tank 6, so that damage to the water pump caused by mineral aggregate crushing is avoided.
As shown in fig. 3, the mineral aggregate buffering, recovering and filtering device 16 is arranged on the metal slide rail 21 of the water storage tank 6, so that the mineral aggregate buffering, recovering and filtering device can conveniently slide along the metal slide rail 21 transversely, and can recover mineral aggregate at an outlet position far away from the return pipeline 15. The inner wall of the mineral aggregate buffering, recycling and filtering device 16 is coated with an organic buffer layer, the wall surface and the organic buffer layer are provided with water filtering holes 22, so that the possibility of mineral aggregate crushing is reduced to the greatest extent while the backflow liquid is conveniently discharged to the water storage tank 6, and the damage to the stainless steel centrifugal water pump 7 is avoided.
As shown in fig. 4, the hot start mineral aggregate injecting device 10 is provided with a mineral aggregate bin 24 and an injecting channel 26, and a quick-release sealing cover 23 and a release valve 25 are arranged at the top. Unlike the experiment in which mineral aggregate must be injected first and then the circulation system started, the invention can realize hot start mineral aggregate injection, and the concrete process is as follows: after the vertical transparent mineral aggregate conveying pipeline transversely vibrates and the in-pipe flow circulation module starts to operate, the release valve 25 of the hot start mineral aggregate injection device 10 is closed, the mineral aggregate bin 24 is filled with liquid water, the mineral aggregate to be tested is placed into the mineral aggregate bin 24, and the quick-release sealing cover 23 at the top is closed. The release valve 25 of the hot start mineral aggregate injection device 10 is then opened and mineral aggregate flows through the injection channel 26 into the horizontal main conduit 27 of the in-line flow circulation module, and the flow of mineral aggregate through the vertical transparent mineral aggregate transfer conduit 12 is measured for its movement characteristics, and the release valve 25 is then closed. The hot start mineral aggregate injection device 10 can conveniently realize the injection of mineral aggregate, and simultaneously the injection process can effectively reduce the influence on pipeline flow state.
The image acquisition and analysis module includes a soft light plate and a light supplementing lamp sequentially arranged at the rear of the experimental system to provide uniform background light, and a high-speed CMOS camera arranged at the front of the experimental system to obtain refined motion measurement images of mineral aggregate in the vertical transparent mineral aggregate conveying pipeline 12. And then carrying out Hough transformation on the shot undistorted particle image by adopting a calculation program to obtain the boundary of the spherical particles, the pixel value of the diameter of each spherical particle and the two-dimensional coordinate of each spherical particle.
The working process of the experimental system for measuring the flow characteristics of mineral aggregate in the vibrating vertical conveying pipeline comprises the following steps:
step 1, injecting 70% volume of liquid water into a water storage tank 6;
Step 2, turning on a power supply of the hydraulic actuator 1, the stainless steel centrifugal water pump 7, the water pump frequency converter 8, the flowmeter 9 and the light supplementing lamp;
step 3, starting a water pump frequency converter 8, and gradually adjusting and increasing until the preset flow is achieved;
Step 4, turning on a high-speed CMOS camera to start recording the flow state change of the observation section of the vertical transparent mineral aggregate conveying pipeline 12;
And 5, closing a release valve 25 of the hot-start mineral aggregate injection device 10, opening a quick-release sealing cover 23 at the top, filling the mineral aggregate bin 24 with liquid water, placing mineral aggregate particles to be tested into the mineral aggregate bin 24, and closing the quick-release sealing cover 23 at the top. Then opening the release valve 25 of the hot start mineral aggregate injection device 10, the mineral aggregate particles start to enter the horizontal main pipe 26 of the in-pipe flow circulation module, and then closing the release valve 25;
Step 6, mineral aggregate particles enter a mineral aggregate buffering, recycling and filtering device 16 of the water storage tank 6 through a transverse vibration energy absorbing device 11, an elbow flange 17, a vertical transparent mineral aggregate conveying pipeline 12, an upper elbow 13, a water receiving tank 14 and a backflow pipeline 15;
Step 7, after the experiment is finished, closing the high-speed CMOS camera, and performing data post-processing;
Step 8, gradually reducing the water pump frequency converter 8 to 0 Hz, and finally stopping flowing the liquid flowing in the pipe through the circulating module;
step 9, turning off the power supply of the hydraulic actuator 1, the stainless steel centrifugal water pump 7, the water pump frequency converter 8, the flowmeter 9 and the light supplementing lamp;
Step 10, obtaining mineral aggregate particles recovered by the mineral aggregate buffering recovery filtering device 16.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The experimental system for measuring the flow characteristics of mineral aggregate in the vibrating vertical conveying pipeline is characterized by comprising a vibrating table module, a flow circulation module in the pipe, a mineral aggregate injection and recovery module and an image acquisition and analysis module; the vibrating table module comprises a hydraulic actuator, a vibrating platform, a platform sliding rail, a platform base and a supporting structure; the in-pipe flow circulation module comprises a water storage tank, a stainless steel centrifugal water pump, a water pump frequency converter, a flowmeter, a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow, a water receiving tank and a reflux pipeline; the mineral aggregate injection and recovery module comprises a hot start mineral aggregate injection device and a mineral aggregate buffering and recovery filtering device;
The vibration platform is arranged on a platform sliding rail above the platform base, and the hydraulic actuator is connected with the vibration platform; the vertical transparent mineral aggregate conveying pipeline and the supporting structure are vertically fixed above the vibration platform, and the hydraulic actuator drives the vibration platform and the vertical transparent mineral aggregate conveying pipeline above the vibration platform to perform high-frequency reciprocating motion to a large extent and is used for driving the transverse vibration forming the vertical transparent mineral aggregate conveying pipeline; the water for the experimental system sequentially flows through a water storage tank, a stainless steel centrifugal water pump, a flowmeter, a hot start mineral aggregate injection device, a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow, a water receiving tank and a reflux pipeline, and finally flows into a mineral aggregate buffering, recycling and filtering device; the mineral aggregate injection and recovery module is used for injecting and recovering mineral aggregate particles in the experimental process; the image acquisition and analysis module analyzes and processes the experimental image by means of the experimental image obtained by the high-speed camera so as to obtain the movement characteristics of mineral aggregate particles.
2. The experimental system for measuring the flow characteristics of mineral aggregate in the vibrating vertical conveying pipeline according to claim 1, wherein the experimental system performs injection, filtration and recovery of mineral aggregate particles under the conditions of transverse high-frequency vibration of the vertical transparent mineral aggregate conveying pipeline and adjustable conveying flow in the vertical transparent mineral aggregate conveying pipeline, so as to realize measurement and analysis of the movement characteristics of mineral aggregate particles with different particle diameters in the vertical transparent mineral aggregate conveying pipeline; the high frequency is at most 2 Hz; the maximum adjustable conveying flow rate is 130 cubic meters per hour; the particle size of the mineral aggregate particles is 1-4 cm.
3. An experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer line according to claim 1, wherein the transverse vibration absorbing device comprises two metal expansion joints, wherein the two metal expansion joints are fixedly arranged on a slipway of a bench support structure in series, one metal expansion joint is connected with a hot start mineral aggregate injection device, the other metal expansion joint is vertical to the vertical transparent mineral aggregate transfer line, and is connected with an elbow flange below the vertical transparent mineral aggregate transfer line.
4. The experimental system for measuring the flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline according to claim 1, wherein the mineral aggregate injecting and recovering module is used for injecting mineral aggregate particles with the diameter of 1-4 cm into the experimental system, and the mineral aggregate buffering, recovering and filtering device is arranged in the water storage tank, so that damage to the water pump caused by crushing of the mineral aggregate particles is avoided.
5. An experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer line according to claim 1, wherein the mineral aggregate buffer recovery filter device is disposed on a metal rail of the water storage tank to facilitate pushing the mineral aggregate buffer recovery filter device to move laterally along the metal rail to recover mineral aggregate at a location remote from the outlet of the return line.
6. The experimental system for measuring the flow characteristics of mineral aggregate in a vibrating vertical conveying pipeline according to claim 1, wherein the hot start mineral aggregate injection device is provided with a mineral aggregate bin and an injection channel, and a quick-release sealing cover and a release valve are arranged at the top; after the vertical transparent mineral aggregate conveying pipeline transversely vibrates and the in-pipe flow circulation module starts to operate, firstly closing a release valve of the hot start mineral aggregate injection device, filling a mineral aggregate bin with liquid water, putting mineral aggregate particles to be tested into the mineral aggregate bin, and closing a quick-release sealing cover at the top; and then opening a release valve of the hot start mineral aggregate injection device, allowing mineral aggregate particles to enter a horizontal main pipeline of the flow circulation module in the pipe through the injection channel, measuring the movement characteristics of the mineral aggregate particles when the mineral aggregate particles flow into the vertical transparent mineral aggregate conveying pipeline, and then closing the release valve.
7. An experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer line according to claim 3, wherein when the hydraulic actuator drives the vibrating platform and the vertical transparent mineral aggregate transfer line above the vibrating platform to vibrate laterally, the other metal expansion joint connected to the lower side of the vertical transparent mineral aggregate transfer line and the one metal expansion joint connected in series are simultaneously stretched and contracted, thereby eliminating transmission of the lateral vibration to the hot start mineral aggregate injector.
8. The experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer pipeline according to claim 1, wherein an organic buffer layer is attached to an inner wall of the mineral aggregate buffer recovery filter device, and water filtering holes are drilled in the inner wall and the organic buffer layer.
9. An experimental method of an experimental system for measuring flow characteristics of mineral aggregate in a vibrating vertical transfer tube as defined in claim 6, comprising the steps of:
Step 1, injecting 70% volume of liquid water into a water storage tank;
Step 2, turning on a power supply of the hydraulic actuator, the stainless steel centrifugal water pump, the water pump frequency converter, the flowmeter and the light supplementing lamp;
Step 3, starting a water pump frequency converter, and increasing step by step until a preset flow is achieved;
Step 4, turning on a high-speed camera to start recording flow state change of an observation section of the vertical transparent mineral aggregate conveying pipeline;
Step5, closing a release valve of the hot-start mineral aggregate injection device, opening a quick-release sealing cover at the top, filling a mineral aggregate bin with liquid water, placing mineral aggregate particles to be tested into the mineral aggregate bin, and closing the quick-release sealing cover at the top; then opening a release valve of the hot start mineral aggregate injection device, enabling mineral aggregate particles to enter a horizontal main pipeline of the flow circulation module in the pipe, and then closing the release valve;
Step 6, mineral aggregate particles enter a mineral aggregate buffering, recycling and filtering device of the water storage tank through a transverse vibration energy absorbing device, an elbow flange, a vertical transparent mineral aggregate conveying pipeline, an upper elbow pipe, a water receiving tank and a backflow pipeline;
step 7, after the experiment is finished, closing the high-speed camera, and performing data post-processing;
Step 8, gradually reducing the frequency converter of the water pump to 0Hz, and finally stopping flowing the liquid flowing in the pipe through the circulating module;
Step 9, closing a power supply of the hydraulic actuator, the stainless steel centrifugal water pump, the water pump frequency converter, the flowmeter and the light supplementing lamp;
and step 10, obtaining mineral aggregate particles recovered by the mineral aggregate buffering recovery filtering device.
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| CN116878799A (en) * | 2023-09-06 | 2023-10-13 | 天津大学 | Deep sea mining flexible riser conveying spiral flow vibration response testing device and method |
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