Visual device and method for researching bubble discharging rule of magnetic slurry under magnetic vibration

Abstract

The invention provides a visualization device and method for researching the bubble discharging rule of magnetic slurry under magnetic vibration, and the device comprises a support, the top of the support is fixedly provided with an acrylic device, the interior of the acrylic device is used for containing the magnetic slurry, the right lower part of the support is provided with a magnet for generating a magnetic field, and the magnet is arranged at the output end of a magnetic vibration device; a camera used for recording the whole experiment process is arranged on the side edge of the acrylic device. According to the device and the method, during testing, a camera is arranged in front of an acrylic device, bubbles are introduced by adding an air entraining agent into magnetic slurry, edible oil is used as upper-layer liquid, silicone oil with different viscosities simulates the viscosity of the magnetic slurry under different magnetic field intensities, and transparent magnetic particles can also be added to observe the influence of the transparent magnetic particles on a bubble discharging mechanism.

Description

Technical Field

[0001] The invention relates to the field of grouting material performance research, and relates to a visualization device and method for studying the bubble discharge law of magnetic slurry under magnetic vibration, which is used for studying the self-driving gas effect of magnetically driven cement-based grouting materials. Background Art

[0002] As time goes by, many infrastructure and industrial buildings are facing aging and damage. For example, a large number of bridges, tunnels, underground pipelines and building foundations, due to long-term loads, environmental erosion and geological activities, will have cracks, holes, looseness and other defects, which need to be repaired by grouting.

[0003] However, for some narrow and long cracks, traditional grouting repairs may not be dense enough and may result in cavities, so the grouting material needs to be vibrated and compacted. However, it is difficult to expel the air in the cracks with traditional grouting methods, making it difficult to ensure the safety and durability of the grouting repair. Summary of the invention

[0004] In order to solve the current technical problems, the main purpose of the present invention is to provide a visualization device and method for studying the bubble discharge law of magnetic slurry under magnetic vibration. During the test, a camera is set in front of the acrylic device. Bubbles are introduced by adding air entraining agent to the magnetic slurry. Edible oil is used as the upper liquid, and silicone oils of different viscosities simulate the viscosity of magnetic slurry under different magnetic field strengths. Transparent magnetic particles can also be added to observe their influence on the bubble discharge mechanism. The device and method can study the influence of factors such as magnetic powder particle size, content, magnetic field strength, vibration frequency, route, etc. on the number, diameter, volume, shape, position, rising speed, and stress state of bubbles discharged from magnetic slurry. It has the advantages of simple structure, low cost, and simple operation. It can be applied to underwater and narrow crack grouting repair scenes to achieve the effect of vibrating and compacting the magnetic slurry and discharging bubbles, and intuitively observe the change law of bubbles.

[0005] In order to realize the above-mentioned technical features, the purpose of the present invention is achieved as follows: a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration, comprising a bracket, an acrylic device is fixedly arranged on the top of the bracket, the interior of the acrylic device is used to hold the magnetic slurry, a magnet for generating a magnetic field is arranged directly below the bracket, and the magnet is arranged at the output end of the magnetic vibration device; a camera for recording the entire experimental process is arranged on the side of the acrylic device.

[0006] The acrylic device is made of two acrylic plates sealed by silicone rubber, and holes are punched at the bottom of the side for injecting magnetic slurry.

[0007] By injecting air-entraining agent into the interior of the magnetic slurry, a large number of tiny, independent and evenly distributed bubbles are introduced into the interior of the magnetic slurry, so that the movement law of the bubbles can be observed in the experiment.

[0008] Edible oil is arranged on the upper layer of the magnetic slurry, and the rising stage of bubbles is observed through the edible oil so as to observe the regularity of bubble discharge.

[0009] Based on the fact that the viscosity of magnetic slurry increases with the increase of magnetic field strength, that is, the closer the magnetic slurry is to the lower layer of the magnet, the greater its viscosity, silicone oils with different viscosities are used to simulate magnetic slurries under different magnetic field strengths, and silicone oils with different viscosities are dyed with pigments of different colors until they are translucent for easy observation, thereby achieving stratification of silicone oils with different viscosities, and facilitating the observation of the movement of bubbles in silicone oils with different viscosities and the changes of bubbles in the boundary line of silicone oils with different viscosities.

[0010] The magnetic field is provided by a magnet. Magnets with different magnetic field strengths are used to study the effects of different magnetic field strengths on the number, size, volume and efficiency of bubbles discharged from the magnetic slurry.

[0011] The magnetic vibrator consists of a motor, a control device and a transmission rod. The magnetic vibrator is provided with magnetic field strength by a magnet, the motor provides power, the transmission rod performs power transmission, and the control device adjusts the vibration frequency. By replacing magnets with different magnetic field strengths, adjusting the vibration frequency, and changing the up, down, left, and right vibration amplitude of the transmission rod, the influence of different factors on the bubble discharge law of magnetic slurry is studied.

[0012] Transparent magnetic particles were added to cement slurry instead of magnetic powder. The process of transparent magnetic particles forming chain or network structures under magnetic field strength was observed through a transparent acrylic device. The mechanism of transparent magnetic particles in expelling bubbles was further observed.

[0013] By placing the camera in front of the acrylic device and focusing on the entire acrylic device, it is ensured that the process of the magnetic slurry expelling bubbles can be fully captured; The bracket is used to support the entire acrylic device, and a space for placing a magnetic vibrating device is left under the bracket.

[0014] A method for studying the bubble removal law of magnetic slurry under magnetic vibration, the method is carried out using a visualization device, and comprises the following steps: Step 1: Prepare materials: prepare acrylic device, magnetic slurry, air entraining agent, edible oil, silicone oil, camera, bracket, magnet, magnetic vibration device, motor, control device, transmission rod and pigment; Step 2: Place the camera in front of the acrylic device and focus on the acrylic device. Add a certain amount of air entraining agent into the prepared magnetic slurry and stir the magnetic slurry evenly. Use a syringe to inject the magnetic slurry from the hole reserved at the bottom of the acrylic device and evenly add edible oil from the top of the acrylic device to prevent part of the slurry from mixing into the edible oil, which will cause turbidity and difficulty in observation. Step 3: Install the magnet on the magnetic vibration device and place the magnet directly below the acrylic device. Use the control device to adjust the required frequency and the direction of the force transmission rod to obtain the vibration amplitude required for the test. Step 4: Turn on the camera and the magnetic vibrator. The magnet changes the magnetic field through the vibration amplitude of the magnetic vibrator. The magnetic powder in the magnetic slurry vibrates under the influence of the magnetic vibration, so that a large number of bubbles in the magnetic slurry are discharged, thereby realizing the traditional concrete vibration and making the magnetic slurry denser. Step 5: Under the condition that other conditions remain unchanged, the particle size and content of magnetic powder in the magnetic slurry are changed, magnets with different magnetic field strengths are replaced, the vibration frequency and amplitude of magnetic vibration are changed, and magnetic vibration is performed to study the influence of magnetic powder content, magnetic field strength, vibration frequency and vibration amplitude on the degassing of magnetic slurry bubbles; Step 6: Process the captured video with equal frame numbers, crop the captured images using PS software, ensure that the cropping position is consistent with the size of the acrylic device, and analyze the number, diameter, volume, shape, position, rising speed and stress state of the bubbles discharged from the magnetic slurry in the image to obtain the bubble discharge law of the magnetic slurry under magnetic vibration.

[0015] The present invention has the following beneficial effects: 1. The present invention aims at underwater grouting repair and narrow crack grouting repair in some scenes where it is inconvenient to perform vibration compaction. By injecting magnetic slurry, the slurry can be vibrated and compacted by magnetic vibration to expel bubbles.

[0016] 2. The present invention utilizes a transparent visual device to realize a process in which bubbles are discharged from the magnetic slurry under magnetic vibration.

[0017] 3. The present invention uses edible oil instead of the upper liquid of the magnetic slurry as a medium for observing the generation of bubbles in the magnetic slurry. The viscosity and color characteristics of the edible oil itself make it easier to observe the changes in the bubbles.

[0018] 4. The present invention clearly observes the number of bubbles generated by the magnetic slurry under magnetic vibration and the efficiency of discharging the bubbles within a certain period of time.

[0019] 5. The present invention can analyze the captured video frame by frame and analyze the force on the bubble through the diameter, shape and motion state of the bubble.

[0020] 6. The present invention can study the effect of magnetic powder vibrating under the action of magnetic field by changing the dosage of magnetic powder in magnetic slurry.

[0021] 7. The present invention can change the magnetic field strength and study the effect of different magnetic field strengths on the vibration of magnetic slurry.

[0022] 8. The present invention studies the influence of vibration frequency and vibration amplitude on the compaction and bubble discharge of magnetic slurry by changing the vibration frequency and vibration amplitude.

[0023] 9. Based on the characteristic that the viscosity of magnetic slurry increases with the increase of magnetic field strength, the present invention uses silicone oils of different viscosities to simulate magnetic slurry under different magnetic field strengths, that is, the silicone oil is layered, and the magnetic slurry in the lower layer closer to the magnet is simulated with larger silicone oil.

[0024] 10. The present invention observed the change in the shape of bubbles from high-viscosity silicone oil to low-viscosity silicone oil. In the process from high-viscosity silicone oil to low-viscosity silicone oil, the bubbles will undergo obvious deformation at the boundary between the two silicone oils, and then the bubbles will gradually change from irregular shape to regular circle.

[0025] 11. The present invention uses a portion of transparent magnetic particles, which can effectively observe the effect of transparent magnetic particles forming chain-like and network-like structures on the discharge of bubbles under the action of magnetic field strength.

[0026] 12. The device proposed by the present invention has the characteristics of simple structure, low cost, small size and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 Overall diagram of the device.

[0029] Figure 2 Pour magnetic mortar into the acrylic device.

[0030] Figure 3 Transmission rod and control device of magnetic vibrating device.

[0031] Figure 4 Motor for magnetic vibrating device.

[0032] Figure 5 Electromagnets replace magnetic vibrators.

[0033] Figure 6 The effect of magnetic mortar removing bubbles.

[0034] Figure 7 Silicone oil with different viscosities simulates magnetic mortar.

[0035] Figure 8 The change in the shape of bubbles under magnetic vibration.

[0036] Fig. 9 The change in the shape of bubbles under magnetic vibration.

[0037] Fig.10 The transparent magnetic particles form a network structure and a chain structure according to the magnetic flux lines.

[0038] In the figure: acrylic device 1, magnetic slurry 2, edible oil 4, silicone oil 5, camera 6, bracket 7, magnet 8, magnetic vibration device 9, motor 9.1, control device 9.2, transmission rod 9.3, electromagnet 13, power supply 14. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0040] Embodiment 1: Reference Figure 1-10 A visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration includes a bracket 7, an acrylic device 1 is fixedly arranged on the top of the bracket 7, the interior of the acrylic device 1 is used to hold the magnetic slurry 2, a magnet 8 for generating a magnetic field is arranged directly below the bracket 7, and the magnet 8 is arranged at the output end of the magnetic vibration device 9; a camera 6 for recording the entire experimental process is arranged on the side of the acrylic device 1. In this device and method, a camera is arranged in front of the acrylic device during the experiment, and bubbles are introduced by adding an air entraining agent to the magnetic slurry, using edible oil as the upper liquid, and different viscosity silicone oils simulate the viscosity of the magnetic slurry under different magnetic field strengths. Transparent magnetic particles can also be added to observe their influence on the bubble discharge mechanism. The device and method can study the influence of factors such as magnetic powder particle size, content, magnetic field strength, vibration frequency, route, etc. on the number, diameter, volume, shape, position, rising speed, and stress state of bubbles discharged from magnetic slurry. It has the advantages of simple structure, low cost, and simple operation. It can be used in scenarios such as underwater and narrow crack grouting repair, to achieve the effect of vibrating the magnetic slurry to compact it and discharge bubbles, and to intuitively observe the change pattern of bubbles.

[0041] Furthermore, the acrylic device 1 is made of two acrylic plates sealed by silicone rubber, and a hole is punched at the bottom of the side for injecting the magnetic slurry 2. Moreover, the acrylic device 1 is a transparent structure, so as to facilitate the subsequent observation of the changes of the bubbles inside.

[0042] Furthermore, by injecting the air entraining agent 3 into the interior of the magnetic slurry 2, a large number of tiny, independent and evenly distributed bubbles are introduced into the interior of the magnetic slurry 2, so that the movement law of the bubbles can be observed in the experiment.

[0043] Furthermore, edible oil 4 is provided on the upper layer of the magnetic slurry 2, and the rising stage of the bubbles is observed through the edible oil 4, so as to observe the regularity of the bubble discharge.

[0044] Furthermore, based on the fact that the viscosity of the magnetic slurry 2 increases with the increase of the magnetic field strength, that is, the closer the magnetic slurry 2 is to the lower layer of the magnet 8, the greater its viscosity, the magnetic slurry 2 under different magnetic field strengths is simulated by using silicone oil 5 with different viscosities, and the silicone oil 5 with different viscosities is dyed with pigments of different colors to a translucent state for easy observation, thereby achieving stratification of silicone oils with different viscosities, and facilitating the observation of the movement of bubbles in silicone oils with different viscosities and the changes of bubbles in the boundary line of silicone oils 5 with different viscosities.

[0045] Furthermore, the magnet 8 provides a magnetic field, and the magnet 8 with different magnetic field strengths is used to study the effects of different magnetic field strengths on the number, size, volume and efficiency of bubbles discharged from the magnetic slurry 2.

[0046] Furthermore, the magnetic vibrating device 9 is composed of a motor 9.1, a control device 9.2 and a transmission rod 9.3. The magnetic vibrating device 9 is provided with magnetic field strength by a magnet 8, the motor 9.1 provides power, the transmission rod 9.3 performs power transmission, and the control device 9.2 adjusts the vibration frequency. By replacing the magnets 8 with different magnetic field strengths, adjusting the vibration frequency, and changing the vibration amplitude of the transmission rod up, down, left, and right, the influence of different factors on the bubble discharge law of the magnetic slurry 2 is studied.

[0047] Furthermore, transparent magnetic particles are added to cement slurry instead of magnetic powder, and the process of transparent magnetic particles forming a chain or network structure under the magnetic field strength is observed through a transparent acrylic device 1, and the mechanism of transparent magnetic particles in expelling bubbles is further observed.

[0048] Furthermore, by placing the camera 6 in front of the acrylic device 1 and focusing on the entire acrylic device 1, it is ensured that the process of the magnetic slurry 2 discharging bubbles can be completely captured; Furthermore, the bracket 7 is used to support the entire acrylic device 1 , and a space for placing the magnetic vibrating device 9 is reserved under the bracket 7 .

[0049] Embodiment 2: A method for studying the bubble removal law of magnetic slurry under magnetic vibration, the method is carried out using a visualization device, and comprises the following steps: Step 1: Prepare materials: prepare acrylic device 1, magnetic slurry 2, air entraining agent 3, edible oil 4, silicone oil 5, camera 6, bracket 7, magnet 8, magnetic vibration device 9, motor 9.1, control device 9.2, transmission rod 9.3 and pigment; Step 2: Place the camera 6 in front of the acrylic device 1 and focus on the acrylic device 1, add a certain amount of air entraining agent 3 into the prepared magnetic slurry 2, and stir the magnetic slurry 2 evenly; inject the magnetic slurry 2 from the hole reserved at the bottom of the acrylic device 1 using a syringe, and evenly add edible oil 4 from the top of the acrylic device 1 to prevent part of the slurry from mixing into the edible oil 4, resulting in turbidity and difficulty in observation; Step 3: Install the magnet 8 on the magnetic vibrating device 9, and place the magnet 8 directly below the acrylic device 1. Adjust the required frequency through the control device 9.2, adjust the direction of the force transmission rod 9.3, and obtain the vibration amplitude required for the test; Step 4: Turn on the camera 6 and the magnetic vibrator 9. The magnet 8 changes the magnetic field through the vibration amplitude of the magnetic vibrator. The magnetic powder in the magnetic slurry 2 vibrates under the influence of the magnetic vibration, so that a large number of bubbles in the magnetic slurry 2 are discharged, thereby realizing the traditional concrete vibration and making the magnetic slurry 2 denser. Step 5: Under the condition that other conditions remain unchanged, the particle size and content of magnetic powder in the magnetic slurry 2 are changed, the magnets 8 with different magnetic field strengths are replaced, the vibration frequency and amplitude of the magnetic vibration are changed, and magnetic vibration is performed to study the influence of the magnetic powder content, magnetic field strength 8, vibration frequency and vibration amplitude on the bubble removal of the magnetic slurry 2; Step 6: The captured video is processed with equal frame numbers, and the captured images are cropped using PS software to ensure that the cropping position is consistent with the size of the acrylic device 1. The number, diameter, volume, shape, position, rising speed and stress state of the bubbles discharged from the magnetic slurry 2 in the image are analyzed to obtain the bubble discharge law of the magnetic slurry under magnetic vibration.

[0050] Embodiment 3: Using edible oil instead of water as a medium for observing the bubble discharge of magnetic slurry includes the following steps: Step 1: Prepare materials: prepare acrylic device 1, magnetic slurry 2, air entraining agent 3, edible oil 4, camera 6, bracket 7, magnet 8, magnetic vibration device 9, motor 9.1, control device 9.2, transmission rod 9.3; Step 2: Place the camera 6 in front of the acrylic device 1 and focus on the acrylic device 1, add a certain amount of air entraining agent 3 to the prepared material, and stir evenly to form a magnetic slurry 2; inject the magnetic slurry 2 from the hole reserved at the bottom of the acrylic device 1 using a syringe, and evenly add edible oil 4 from the top of the acrylic device 1 to prevent part of the slurry from mixing into the edible oil 4, resulting in turbidity and difficulty in observation; Step 3: Install the magnet 8 on the magnetic vibrating device 9, and place the magnet 8 directly below the acrylic device 1. Adjust the required frequency through the control device 9.2, adjust the direction of the force transmission rod 9.3, and obtain the vibration amplitude required for the test; Step 4: Turn on the camera 6 and the magnetic vibrator 9. The magnet 8 changes the magnetic field through the vibration amplitude of the magnetic vibrator. The magnetic powder in the magnetic slurry 2 vibrates under the influence of the magnetic vibration, so that a large number of bubbles in the magnetic slurry 2 are discharged, thereby realizing traditional concrete vibration and making the magnetic slurry 2 denser. Step 5: Under the condition that other conditions remain unchanged, the magnetic powder content in the magnetic slurry 2 is changed respectively to study the effect of the magnetic powder content in the magnetic slurry on the bubble discharge of the magnetic slurry 2 under magnetic vibration; Step 6: Use an oily cleaning agent to clean the acrylic device 1. After cleaning, repeat Step 2-Step 4, ensure that other conditions remain unchanged, replace magnets with different magnetic field strengths, and study the effects of different magnetic field strengths on the bubble discharge of the magnetic slurry 2 under magnetic vibration; Step 7: Clean the acrylic device, repeat Step 2-Step 4, ensure that other conditions remain unchanged, change the vibration frequency, and study the effect of the vibration frequency on the bubble discharge of the magnetic slurry 2 under magnetic vibration; Step 8: Use a cleaning agent to clean the acrylic device, repeat Step 2-Step 4, ensure that other conditions remain unchanged, change the vibration amplitude, and study the effect of the vibration amplitude on the bubble discharge of the magnetic slurry 2 under magnetic vibration; Step 9: The captured video is processed with equal frame numbers, and the captured images are cropped using PS software to ensure that the cropping position is consistent with the size of the acrylic device 1. The number, diameter, volume, shape, position, rising speed and force of the bubbles discharged by the magnetic slurry 2 in the image are analyzed respectively. In this way, the bubble discharge law of the magnetic slurry under magnetic vibration is obtained.

[0051] Embodiment 4: Electromagnets are used instead of magnetic vibrators to change the current to achieve large magnetic field changes.

[0052] The following steps are involved: Step 1: Prepare materials: prepare acrylic device 1, magnetic slurry 2, air entraining agent 3, cooking oil 4, camera 6, bracket 7, electromagnet 13, power supply 14.

[0053] Step 2: Place the camera 6 in front of the acrylic device 1 and focus on the acrylic device 1, add a certain amount of air entraining agent 3 to the prepared material, and stir evenly to form the magnetic slurry 2. Use a syringe to inject the magnetic slurry 2 from the hole reserved at the bottom of the acrylic device 1, and evenly add edible oil 4 from the top of the acrylic device 1 to prevent part of the slurry from mixing into the edible oil 4, which will cause turbidity and difficulty in observation.

[0054] Step 3: Install the electromagnet 13 directly below the acrylic device 1 and connect the electromagnet 13 to the power source 14 via a wire.

[0055] Step 4: Turn on the camera 6 and the power supply 14, and change the magnitude of the magnetic field strength generated by the electromagnet 13 by changing the magnitude of the current flowing through the electromagnet 13. By greatly changing the magnitude of the current, a large-scale magnetic vibration is achieved that is far beyond the magnetic vibration device 9. The large-scale magnetic vibration allows a large number of bubbles in the magnetic slurry 2 to be quickly discharged, so that the magnetic slurry 2 is quickly vibrated and compacted.

[0056] Step 9: The captured video is processed with equal frame numbers, and the captured images are cropped using PS software to ensure that the cropping position is consistent with the size of the acrylic device 1. The number, diameter, volume, shape, position, rising speed and force of the bubbles discharged from the magnetic slurry 2 in the image are analyzed.

[0057] Embodiment 5: Transparent magnetic particles are used instead of magnetic powder to study the bubble expulsion mechanism of magnetic particles at a macroscopic level.

[0058] The following steps are involved: Step 1: Prepare materials: prepare acrylic device 1, magnetic slurry 2, air entraining agent 3, edible oil 4, camera 6, bracket 7, magnet 8, magnetic vibration device 9, motor 9.1, control device 9.2, transmission rod 9.3 transparent magnetic particles 11.

[0059] Step 2: Place the camera 6 in front of the acrylic device 1 and focus on the acrylic device 1, add a certain amount of air entraining agent 3 and transparent magnetic particles 11 to the prepared material, and stir evenly to form a magnetic slurry 2. Use a syringe to inject the magnetic slurry 2 from the hole reserved at the bottom of the acrylic device 1, and evenly add edible oil 4 from the top of the acrylic device 1 to prevent part of the slurry from mixing into the edible oil 4, resulting in turbidity and difficulty in observation.

[0060] Step 3: Install the magnet 8 on the magnetic vibrating device 9, and place the magnet 8 directly below the acrylic device 1. Adjust the required frequency through the control device 9.2, adjust the direction of the force transmission rod 9.3, and obtain the vibration amplitude required for the test.

[0061] Step 4: Turn on the camera 6 and the magnetic vibrator 9. The magnet 8 changes the magnetic field through the vibration amplitude of the magnetic vibrator. The transparent magnetic particles 11 in the magnetic slurry 2 are affected by the magnetic field strength and a chain or network structure will appear. The mechanism of the magnetic particles to remove bubbles is further observed and studied.

[0062] Step 5: Intercept the captured video with equal frame numbers, and use PS software to crop the captured images to ensure that the cropping position is consistent with the size of the acrylic device 1. Analyze the number, diameter, volume, shape, position, rising speed and force of the bubbles discharged by the magnetic slurry 2 in the image. In this way, the rule of bubble discharge of the magnetic slurry under magnetic vibration is obtained.

[0063] Embodiment 6: Silicone oils of different viscosities are arranged in layers to simulate the viscosity of the magnetic slurry from near to far from the magnet.

[0064] The following steps are involved: Step 1: Prepare materials: prepare acrylic device 1, cooking oil 4, silicone oil 5, camera 6, bracket 7, and paint.

[0065] Step 2: Place the camera 6 in front of the acrylic device 1 and focus on the acrylic device 1. Use pigments to dye the silicone oil 5 of different viscosities into different colors until they are translucent for easy observation. Pour the silicone oils 5 from the top of the acrylic device 1 in order from large to small viscosity to avoid mixing and achieve a layered effect. Then evenly add the edible oil 4 from the top.

[0066] Step 3: Turn on the camera 6 and inject a small amount of bubbles from the reserved hole at the bottom of the acrylic device 1 using a syringe.

[0067] Step 4: Observe the diameter, volume, and rising speed of the bubbles in silicone oils with different viscosities; the shape and stability of the bubbles between the different color dividing lines; and the state changes of the bubbles when they rise from silicone oil 5 to edible oil 4.

[0068] Step 9: The captured video is processed with equal frame numbers, and the captured images are cropped using PS software to ensure that the cropping position is consistent with the size of the acrylic device 1. The change in the shape of the bubbles from high-viscosity silicone oil to low-viscosity silicone oil in the captured images frame by frame is analyzed. In the process from high-viscosity silicone oil to low-viscosity silicone oil, the bubbles will be significantly deformed at the boundary between the two silicone oils, and then the bubbles will gradually change from irregular shapes to regular circles.

Claims

1. A visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration, characterized in that: The invention comprises a bracket (7), an acrylic device (1) is fixedly arranged on the top of the bracket (7), the interior of the acrylic device (1) is used to contain magnetic slurry (2), a magnet (8) for generating a magnetic field is arranged directly below the bracket (7), and the magnet (8) is arranged at the output end of a magnetic vibration device (9); and a camera (6) for recording the entire experimental process is arranged on the side of the acrylic device (1).

2. According to claim 1, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: The acrylic device (1) is made of two acrylic plates sealed by silicone rubber, and holes are punched at the bottom of the side for injecting the magnetic slurry (2).

3. According to claim 2, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: By injecting an air entraining agent (3) into the interior of the magnetic slurry (2), a large number of tiny, independent and evenly distributed bubbles are introduced into the interior of the magnetic slurry (2), so that the movement law of the bubbles can be observed in the experiment.

4. According to claim 2, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: Edible oil (4) is provided on the upper layer of the magnetic slurry (2), and the rising stage of bubbles is observed through the edible oil (4) so ​​as to observe the regularity of bubble discharge.

5. According to claim 2, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: Based on the fact that the viscosity of the magnetic slurry (2) increases with the increase of the magnetic field strength, that is, the closer the magnetic slurry (2) is to the lower layer of the magnet (8), the greater its viscosity, silicone oils (5) of different viscosities are used to simulate the magnetic slurry (2) under different magnetic field strengths, and the silicone oils (5) of different viscosities are dyed with pigments of different colors until they are translucent for easy observation, thereby achieving the stratification of silicone oils of different viscosities, and facilitating the observation of the movement of bubbles in silicone oils of different viscosities and the changes of bubbles in the boundary line of silicone oils of different viscosities (5).

6. The visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping according to claim 2, characterized in that: A magnetic field is provided by a magnet (8), and magnets (8) with different magnetic field strengths are used to study the effects of different magnetic field strengths on the number, size, volume and efficiency of bubbles discharged from the magnetic slurry (2).

7. According to claim 2, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: The magnetic vibrating device (9) is composed of a motor (9.1), a control device (9.2) and a transmission rod (9.3). The magnetic vibrating device (9) is provided with magnetic field strength by a magnet (8), the motor (9.1) provides power, the transmission rod (9.3) performs power transmission, and the control device (9.2) adjusts the vibration frequency. By replacing magnets (8) with different magnetic field strengths, adjusting the vibration frequency, and changing the vibration amplitude of the transmission rod up, down, left, and right, the influence of different factors on the bubble discharge law of the magnetic slurry (2) is studied.

8. According to claim 2, a visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration tamping, characterized in that: Transparent magnetic particles are added to cement slurry instead of magnetic powder. The process of transparent magnetic particles forming chain or network structures under magnetic field strength is observed through a transparent acrylic device (1). The mechanism of transparent magnetic particles in expelling bubbles is further observed.

9. The visualization device for studying the bubble discharge law of magnetic slurry under magnetic vibration as claimed in claim 2, characterized in that: By placing the camera (6) in front of the acrylic device (1) and focusing on the entire acrylic device (1), it is ensured that the process of the magnetic slurry (2) discharging bubbles can be completely photographed; The bracket (7) is used to support the entire acrylic device (1), and a space for placing the magnetic vibrating device (9) is reserved under the bracket (7).

10. A method for studying the bubble discharge law of magnetic slurry under magnetic vibration, characterized in that: The method is performed using the visualization device according to any one of claims 1 to 9, and comprises the following steps: Step 1: Prepare materials: prepare acrylic device (1), magnetic slurry (2), air entraining agent (3), edible oil (4), silicone oil (5), camera (6), bracket (7), magnet (8), magnetic vibration device (9), motor (9.1), control device (9.2), transmission rod (9.3) and pigment; Step 2: Place the camera (6) in front of the acrylic device (1) and focus on the acrylic device (1), add a certain amount of air entraining agent (3) into the prepared magnetic slurry (2), and stir the magnetic slurry (2) evenly; inject the magnetic slurry (2) from the hole reserved at the bottom of the acrylic device (1) using a syringe, and evenly add edible oil (4) from the top of the acrylic device (1) to prevent part of the slurry from mixing into the edible oil (4), resulting in turbidity and difficulty in observation; Step 3: Install the magnet (8) on the magnetic vibration device (9), and place the magnet (8) directly below the acrylic device (1). Use the control device (9.2) to adjust the required frequency and adjust the direction of the force transmission rod (9.3) to obtain the vibration amplitude required for the test; Step 4: Turn on the camera (6) and the magnetic vibrator (9), and the magnet (8) changes the magnetic field through the vibration amplitude of the magnetic vibrator. The magnetic powder in the magnetic slurry (2) vibrates under the influence of the magnetic vibration, so that a large number of bubbles in the magnetic slurry (2) are discharged, thereby realizing traditional concrete vibration and making the magnetic slurry (2) more dense. Step 5: While ensuring that other conditions remain unchanged, the particle size and content of the magnetic powder in the magnetic slurry (2) are changed, the magnets (8) with different magnetic field strengths are replaced, the vibration frequency of the magnetic vibration is changed, the vibration amplitude of the magnetic vibration is changed, and the magnetic vibration is performed to study the effects of the magnetic powder content, magnetic field strength (8), vibration frequency, and vibration amplitude on the degassing of the magnetic slurry (2); Step 6: The captured video is processed with an equal number of frames, and the captured images are cropped using PS software to ensure that the cropping position is consistent with the size of the acrylic device (1). The number, diameter, volume, shape, position, rising speed and stress state of the bubbles discharged from the magnetic slurry (2) in the image are analyzed respectively, so as to obtain the bubble discharge law of the magnetic slurry under magnetic vibration.

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