A sand suction machine noise source integrated modular integrated shielding device

Abstract

The utility model discloses a kind of noise source integrated modularization shielding devices of sand suction machine, including box frame structure, the box frame structure includes the outer frame skeleton formed by section steel connection, sound insulation cover is arranged on the outer frame skeleton, noise source integrated module and non-noise source module formed by sound insulation cover are equipped in the box frame structure, the noise original integrated module is closed structure, and non-noise source module is open frame structure. Integrated design, space utilization is efficient, each component of sand suction machine is integrated installation using modularization frame, especially, noise source is centrally placed in independent noise source integrated module, realize equipment layout compactification, reduce floor area, while facilitating the installation, maintenance and overhaul of equipment, improve use convenience.

Description

Technical Field

[0001] This utility model relates to the field of sand suction machine technology, specifically to a modular integrated shielding device for the noise source of a sand suction machine. Background Technology

[0002] In special coating projects within the shipbuilding and repair industry, sand suction machines are crucial equipment for recovering abrasives from sandblasting operations. Their core function is to achieve pneumatic conveying through negative pressure generated by a Roots blower. However, the noise pollution problem of existing sand suction machines has long remained unresolved, with specific shortcomings as follows:

[0003] Traditional sand suction machines employ an open, scattered structure, resulting in dispersed noise sources without centralized control. Figure 1 As shown, its core noise-generating components, such as the Roots blower, motor, and silencer, are not modularly integrated. During operation, the aerodynamic noise generated by the periodic intake and exhaust of the Roots blower includes rotational noise and eddy current noise, mechanical noise from gear and bearing friction, and the Helmholtz resonance effect caused by intake volume resonance, all of which radiate directly to the outside through equipment gaps. For example, the noise level of a certain type of existing sand suction machine reaches as high as 95 dB during operation, far exceeding the 55 dB nighttime limit for Class 3 areas in the "Emission Standard for Environmental Noise at the Boundary of Industrial Enterprises".

[0004] Current measures rely solely on simple silencers and localized sound insulation materials, such as installing ordinary expansion chamber silencers at the air outlets. However, they fail to address the differentiated characteristics of noise at different frequency bands. For example, high-frequency noise (>1000Hz) cannot be effectively absorbed due to insufficient silencer design length and low density of sound-absorbing materials. Similarly, low-frequency noise is not effectively suppressed by traditional rubber pads for vibrations below 100Hz, resulting in low-frequency noise exceeding the factory boundary by 10-15dB. The equipment lacks professional vibration isolation design; vibrations from the Roots blower and motor are directly transmitted to the frame and ground through rigid bases and pipelines, forming a "sound bridge." Actual measurements show that the equipment vibration frequency is concentrated between 125-800Hz. Low-frequency vibrations easily trigger resonance in surrounding building structures, increasing the noise propagation distance by more than 200 meters and even penetrating residential building walls, causing indoor noise levels to reach 47dB at night, severely disrupting sleep.

[0005] To address the shortcomings of existing technologies, such as dispersed noise sources, insufficient vibration control, limited noise reduction methods, and inconvenient maintenance, this invention provides a modular integrated shielding device. By centrally isolating noise source components, designing a full-band noise reduction structure, strengthening vibration control, and optimizing operation and maintenance convenience, the noise of the sand suction machine is upgraded from "passive treatment" to "active control," ultimately reducing the noise at the equipment to below 62dB, meeting the Class 3 area standards at the plant boundary, and simultaneously improving the safety and reliability of equipment operation. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects in the existing technology and provide an integrated modular shielding device for the noise source of a sand suction machine.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A modular integrated shielding device for noise sources of a sand suction machine includes a box-type frame structure. The box-type frame structure includes an outer frame skeleton formed by connecting steel profiles. A sound insulation covering is provided on the outer frame skeleton. The box-type frame structure is provided with a noise source integrated module and a non-noise source module separated by the sound insulation covering. The noise source integrated module is a closed structure, and the non-noise source module is an open frame structure.

[0009] Furthermore, the noise source integration module is a closed structure with soundproofing coverings on the other five sides, except for the bottom surface.

[0010] Furthermore, the sound insulation covering includes a steel plate, sound-absorbing material, and a positioning mesh cover. The steel plate is an outer covering layer set on the frame structure, and the inner side of the steel plate is filled with sound-absorbing material. The sound-absorbing material is fixed to the steel plate by the positioning mesh cover.

[0011] Furthermore, the side of the box-type frame structure is provided with ladders for climbing up and down and safety belt hook points.

[0012] Furthermore, quick-connection structures are provided at the four corners on the upper side of the outer frame. The quick-connection structures are rectangular, and waist holes are provided on the three adjacent exposed surfaces of the quick-connection structures. The waist holes on the three sides are connected inside the quick-connection structures.

[0013] Furthermore, the sound-absorbing material includes at least one of the following: sound insulation felt, foam, fiberboard, glass wool, rock wool, polyester fiber sound-absorbing cotton, aluminum foam, and mineral wool board.

[0014] Furthermore, a damping and shock absorption device is installed between the bottom foundation of the moving equipment and the outer frame within the noise source integration module.

[0015] Furthermore, the damping and vibration reduction device includes an adjustable damping and vibration reduction mechanism formed by a magnetorheological vibration isolation chassis. The magnetorheological vibration isolation chassis is provided with a magnetorheological fluid layer, a controllable magnetic field winding, and a sensor system. The magnetorheological fluid layer is placed within the magnetic field range of the controllable magnetic field winding. The sensor system collects the real-time vibration frequency of the moving equipment. The controllable magnetic field winding adjusts the magnetic field strength according to the real-time vibration frequency. The change in magnetic field strength changes the damping force of the magnetorheological fluid layer.

[0016] Furthermore, the bottom of the box frame structure is provided with slots for forklifts to lift the forklifts. The slots are made of square steel and extend laterally across the noise source integration module and the non-noise source module to form a bottom reinforcing skeleton.

[0017] The advantages and beneficial effects of this utility model are as follows:

[0018] 1. Integrated design for efficient space utilization: The modular frame integrates and installs all components of the sand suction machine. In particular, the noise source is concentrated in an independent noise source integrated module, which realizes a compact equipment layout, reduces the floor space, and facilitates the installation, maintenance and repair of the equipment, thus improving ease of use.

[0019] 2. The louvered soundproof air inlet window, soundproof exhaust fan, and fractal tree-shaped acoustic barrier structure, designed for air intake and exhaust, effectively suppress noise leakage at the openings while ensuring normal ventilation and heat dissipation of the sand suction machine. The unique duct structure of the fractal tree-shaped acoustic barrier, combined with melamine foam and gradient density glass wool, achieves a balance between ventilation and noise reduction through multiple reflections and absorption of noise.

[0020] 3. The sensor system in the magnetorheological fluid intelligent vibration isolation chassis collects the vibration frequency in real time, and adjusts the magnetic field strength of the controllable magnetic field winding accordingly to dynamically change the damping force of the magnetorheological fluid layer, thereby achieving precise control of vibration and noise under different working conditions and improving the environmental adaptability and noise reduction stability of the device. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a sand suction machine in the prior art.

[0022] Figure 2 This is an isometric drawing of a modular integrated shielding device for the noise source of a sand suction machine according to this utility model.

[0023] Figure 3 This is an exploded view of the modular integrated shielding device for the noise source of the sand suction machine in this utility model;

[0024] Figure 4 This is a structural schematic diagram of the sound insulation covering component in this utility model;

[0025] Figure 5 This is a top cross-sectional view of the box-type frame structure in this utility model;

[0026] Figure 6 This is a schematic diagram of the longitudinal section of the box-type frame structure in this utility model;

[0027] Figure 7 This is a utility model Figure 6 Enlarged structural diagram of the Chinese frame;

[0028] In the diagram: 1. Box-type frame structure; 2. Outer frame skeleton; 3. Sound insulation covering; 4. Noise source integrated module; 5. Non-noise source module; 6. Steel plate; 7. Sound-absorbing material; 8. Positioning mesh cover; 9. Ladders; 10. Safety belt hook points; 11. Quick connection structure; 12. Waist hole; 13. Damping and vibration reduction device; 14. Magnetorheological fluid layer; 15. Controllable magnetic field winding; 16. Slot; 17. Louvered air inlet soundproof window; 18. Soundproof exhaust fan; 19. Magnetorheological fluid intelligent vibration isolation chassis; 20. Upper electrode plate; 21. Fluororubber sealing ring; 22. Lower electrode plate; 23. Limiting post. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] The sand suction machine mainly consists of the following components: cyclone dust collector, cartridge dust collector, Roots blower (vacuum pump), electric motor, pump body inlet air cooling silencer, and outlet air silencer. Figure 1 As shown, the working principle of the sand suction machine is based on the high-speed rotation of two three-bladed blades of the Roots blower, which squeezes out the air between the blades. Through continuous operation, the air is transported from the inlet to the outlet, creating negative pressure in the connecting pipeline and the tank, thereby completing the pneumatic conveying.

[0031] During operation, the sand suction machine requires an external sand suction tank. Pneumatic conveying drives the abrasive into the suction tank; upon impact with the baffle, large abrasive particles fall off at low speed, achieving recovery. Dust-laden air passes sequentially through a cyclone dust collector and a cartridge filter dust collector. The cleaned air then enters a Roots blower, is compressed by the blades, and finally exits through the silencer exhaust port.

[0032] This invention analyzes and controls noise from sand suction machines by addressing the source and propagation path. Furthermore, existing sand suction machines are typically modular designs, resulting in large space requirements, limited mobility, and difficulties in centralized noise control. This invention improves upon this by focusing on overall equipment integration and noise reduction. Specifically:

[0033] A noise source integrated module for a sand suction machine with four integrated shielding devices, such as Figure 2-7 As shown, the sand suction machine includes a box-type frame structure 1. All components of the sand suction machine are integrated and installed inside the box-type frame structure 1. In this embodiment, the sand suction machine is an integral modular frame structure, and the noise-generating components are combined and integrated to form a noise source integrated module 4. The box-type frame structure 1 is provided with a noise source integrated module 4 and a non-noise source module 5 separated by a sound insulation covering 3. The noise source integrated module is a closed structure, and the non-noise source module 5 is an open frame structure.

[0034] Dynamic equipment (such as motors, vacuum pumps, silencers, and fans) is placed in the noise source integration module 4 to control and isolate noise sources and cut off noise propagation paths. Other non-noise source components with aerodynamic noise ≤45dB(A) are integrated into a non-noise source module 5. Specifically, the box-type frame structure 1 includes an independent noise source integration module 4, which integrates and installs the noise source components of the sand suction machine. The noise source of the sand suction machine is concentrated in the noise source integration module 4. Specifically, in this embodiment, the noise source integration module 4 is equipped with noise source devices such as motors, vacuum pumps (Roots blowers), silencers, and fans. It is understood that the types and quantities of noise source devices are not limited, and those skilled in the art can arbitrarily increase or decrease the types and quantities of equipment in the noise source integration module 4. The non-noise source module 5 is an open frame structure, and components such as cyclones, filter cartridges, control boxes, and cable trays are installed within the frame.

[0035] The outer frame of the box-type frame structure 1 is made of 100*100*5mm square tubing welded steel structure. During use, all six sides of the noise source integration module 4 can be sealed with sound-insulating coverings 3. Preferably, the noise source integration module 4 is a closed structure with sound-insulating coverings 3 on the five sides except the bottom. All five sides are made of M6 steel plates 6, with the top and front steel plates 6 being detachable and connected to the sand suction machine frame steel structure using bolts. The core components of the sand suction machine (such as the Roots blower and motor) generate a large amount of heat during operation, requiring forced convection cooling by introducing outside cold air through the bottom air inlet. Secondly, space needs to be reserved at the bottom for installing vibration isolation devices (such as damping spring shock absorbers and magnetorheological fluid chassis). These components need to be exposed for debugging and replacement. The pneumatic conveying pipelines of the sand suction machine (such as suction pipes and return pipes) are usually connected from the bottom, and the open design avoids increased airflow resistance caused by pipe bends (actual measurements show that a fully enclosed design increases airflow resistance by 30%, affecting sand suction efficiency). Furthermore, the low-frequency noise (125-800Hz) generated by Roots blowers has a relatively long wavelength (2.7-0.4m) and strong diffraction ability, making it easy to conduct to distant locations through ground vibrations even when the bottom is enclosed. In contrast, prioritizing shielding the top and sides, where noise radiation is stronger (noise intensity is 10-15dB higher than the bottom), maximizes the "input-output ratio." The top and surrounding steel plates 6 form a "semi-enclosed acoustic enclosure," using the principle of sound reflection to direct noise to non-sensitive areas (such as open factory areas), while the noise from the bottom facing the ground can be absorbed by natural barriers such as soil and vegetation (measured ground absorption coefficient is approximately 0.2-0.3 for low-frequency noise and approximately 0.5-0.8 for high-frequency noise). If the bottom is enclosed, it may cause a "sound focusing" effect, causing noise to be reflected and superimposed inside the module, which would increase structural vibration noise (such as resonance of steel plate 6). Therefore, preferably, the bottom is hollowed out and not covered by sound insulation covering 3.

[0036] The noise source integration module 4 includes a soundproof covering 3 for noise blocking; a noise suppression device for the openings designed for air inlets and outlets; and a damping and vibration reduction device 13 for the noise source components. The noise source integration module 4 seals off the area around the noise source components through the soundproof covering 3, thereby blocking some of the noise from directly propagating outward through the air. By blocking the noise source components, the area of ​​direct contact between the noise source components and the outside environment is reduced, thus isolating the noise propagation path and preventing noise leakage.

[0037] Specifically, the soundproof covering 3 includes a steel plate 6, sound-absorbing material 7, and a positioning mesh cover 8. The sound-absorbing material 7 includes at least one of soundproofing felt, foam, fiberboard, glass wool, rock wool, polyester fiber sound-absorbing cotton, aluminum foam, and mineral wool board. This embodiment takes soundproofing felt as an example. The soundproofing felt is laid and fixed on the steel plate 6 by the positioning mesh cover 8 to form a soundproof wall. Figure 4As shown, sound insulation felt is pasted on the inner side of steel plate 6, and positioning mesh cover 8 is applied to the surface of the sound insulation felt to form a sound insulation wall. The size of the sound insulation wall is based on the installation position of the components, leaving room for pipelines and maintenance holes to facilitate operation and maintenance.

[0038] Measurements show that the vibration frequency of the sand suction machine is concentrated between 125 and 800 Hz. The minimum vibration frequency cutoff in this design is 100 Hz, and the load is ≤ 9T. After the sand suction machine is installed with a soundproof wall, at the factory boundary 200 meters away, it meets the national factory boundary environmental noise emission standard Class 3 nighttime requirement of 55 dB(A).

[0039] Furthermore, the noise suppression device at the opening includes a louvered air inlet soundproof window 17 corresponding to the noise source component of the moving equipment, and a soundproof exhaust fan 18 installed on the top of the noise source integrated module 4. The noise source integrated module 4 centrally houses the noise source components, including essential moving equipment. These moving equipment require airflow for heat dissipation during operation; otherwise, overheating may cause them to shut down. Therefore, the noise source integrated module 4 must be equipped with openings to provide ventilation for the moving equipment, maintaining airflow within the module. Specifically, at the critical location of the motor stator cooling channel in the sand suction machine, such as... Figure 2 , 3 As shown, a corresponding opening is provided at the air intake position of the motor, and this opening is located on the sound insulation cover 3. In this embodiment, the noise suppression device at the opening is set as a louvered air intake sound insulation window 17 to reduce noise propagation. In addition, the outer shell of the sand suction machine is reinforced and covered with sound-absorbing material 7 to further reduce noise. Furthermore, in order to prevent the exhaust noise from spreading to the surroundings, the sound insulation exhaust fan 18 is located on the top of the noise source integration module 4. Specifically, the sound insulation cover 3 on the top is equipped with an upward-facing sound insulation exhaust fan 18.

[0040] Furthermore, vibration noise from the noise source component may also be transmitted through a rigid connection with the frame on the noise source integration module 4. Specifically, the damping and vibration reduction device 13 includes a passive vibration isolation device, such as a vibration isolation spring, air spring, damping material, or buffer material, disposed between the bottom of the noise source component's moving part and its foundation. This cuts off or weakens the sound bridge, reduces vibration transmission, and lowers noise at sensitive points. This is suitable for vibration control of the noise source component in this embodiment. Specifically, the passive vibration isolation device includes at least one of a vibration isolation spring, an air spring, and a damping pad. By adding damping material, the vibration of the object is suppressed, thereby eliminating low-frequency vibration noise.

[0041] The non-noise source module 5 is an open frame structure, with components such as cyclones, filter cartridges, control boxes, and cable trays installed inside the frame; the box-type frame structure 1 is simultaneously designed with ladders 9 and safety belt hook points 10 for personnel to climb to the top for inspection and maintenance.

[0042] Measurements show that the vibration frequency of the sand suction machine is concentrated between 125 and 800 Hz. The minimum vibration frequency cutoff for this design is 100 Hz, and the load is ≤ 9T. After installing soundproof walls, the sand suction machine meets the national standard for Class 3 nighttime environmental noise emissions (55 dB(A)) at the factory boundary, located 200 meters away. However, the nighttime low-frequency noise control requirements of this design are slightly higher than the standard.

[0043] In actual use, the soundproof wall of the sand suction machine can be designed according to customer needs, and the product characteristics such as size, sound insulation capacity, door hole position, and flexible power cable retraction can be customized.

[0044] Furthermore, the damping and vibration reduction device 13 includes a magnetorheological fluid intelligent vibration isolation chassis 19. The chassis 19 contains a magnetorheological fluid layer 14, a controllable magnetic field winding 15, and a sensor system. The magnetorheological fluid layer 14 is placed within the magnetic field range of the controllable magnetic field winding 15. The magnetic field strength of the controllable magnetic field winding 15 is adjusted based on the real-time vibration frequency collected by the sensor system to change the damping force of the magnetorheological fluid layer 14. Specifically, the principle is to monitor the vibration frequency in real time through the sensor. When low-frequency resonance is detected, such as vibration at 125Hz, the coil is energized, causing the viscosity of the magnetorheological fluid to increase instantaneously by 100 times, switching to a "rigid locking state" to suppress resonance. Conversely, at high-frequency vibrations >500Hz, a "flexible damping state" is maintained to absorb energy, thus achieving dynamic control. Compared to the dampers with fixed stiffness used in the previous embodiments, which cannot adapt to vibrations of different frequencies, the magnetorheological fluid system achieves wideband vibration isolation switching with a response of 0.1 seconds, reducing the vibration transmissibility from 40% to 12%.

[0045] In this embodiment, the magnetorheological fluid layer 14 contains a magnetorheological fluid, which is composed of micron-sized magnetic particles, such as carbonyl iron powder, dispersed in silicone oil or mineral oil. When no magnetic field is applied, it exhibits a highly fluid liquid state; when an external magnetic field is applied, the particles align along the magnetic field direction to form a chain-like structure, and the fluid viscosity increases rapidly within milliseconds, exhibiting solid-like properties. This characteristic makes the magnetorheological fluid very suitable for vibration control; by adjusting the magnetic field strength, the damping force can be changed in real time, achieving adaptive control of vibrations at different frequencies. The controllable magnetic field winding 15 includes a magnetically conductive frame and an electromagnetic coil wound thereon.

[0046] In this embodiment, specifically, as shown in... Figure 6 , 7As shown, the magnetorheological fluid intelligent vibration isolation chassis 19 is positioned between the bottom of the noise source component and the frame at the bottom of the noise source integrated module 4, replacing the traditional damping spring shock absorber. It includes upper and lower electrode plates 22, made of Q235 steel plate 6, 20mm thick, with a nickel-plated surface for corrosion protection; a magnetorheological layer, 5mm thick, filled with MRF-132DG type magnetorheological fluid, with a density of 3.3g / cm³ and a yield strength ≥50kPa@2kA / m, is placed between the two electrode plates; the magnetic guiding frame is made of stacked silicon steel sheets, surrounding the magnetorheological fluid layer 1424 to form a closed magnetic circuit, enhancing magnetic field efficiency. The electromagnetic coil uses AWG18 enameled wire, wound several turns on the silicon steel sheet, embedded in the groove of the lower electrode plate 22, generating a vertical magnetic field after energization.

[0047] The upper electrode plate 20 is connected to the noise source component. The upper plate is made of Q235 steel plate 6 with a thickness of 20mm and nickel-plated surface for corrosion protection. Multiple screw holes are opened on the top surface, and it is fixedly connected to the base of the noise source component by high-strength bolts. A 5mm deep annular groove is machined on its bottom surface, and a fluororubber sealing ring 21 is embedded inside to prevent the magnetorheological fluid from leaking. Positioning pin holes are set at the four corners of the upper plate, which cooperate with the positioning pins of the lower electrode plate 22 to ensure installation accuracy.

[0048] The lower electrode plate 22 is used for connection with the frame; it is made of QT400 ductile iron with a thickness of 25mm and a powder-coated surface; a 50mm thick neoprene rubber shock-absorbing pad with a Shore hardness of 60A is pasted on the bottom surface to further isolate the frame vibration; an electromagnetic coil mounting groove with a depth of 15mm and a diameter of 200mm is opened in the center of the top surface, and a thermally conductive silicone sheet with a thermal conductivity of 1.5W / (m・K) is attached to the groove wall to ensure coil heat dissipation; positioning pins are evenly distributed on the edge of the lower electrode plate 22 to cooperate with the pin holes of the upper electrode plate 20 to achieve quick alignment.

[0049] The distance between the upper and lower electrode plates 22 is precisely controlled to 5mm, supported by multiple edge limiting posts 23, which are made of 8mm diameter nylon material, to prevent short circuits caused by contact between the electrode plates and to ensure uniform thickness of the magnetorheological fluid layer 14. The magnetic guiding frame is made of 0.35mm thick silicon steel sheets stacked together, forming a closed magnetic circuit by surrounding the magnetorheological fluid layer 14 in a circular shape; it is understood that the shape of the magnetic guiding frame can also be a polygonal structure, and its shape is not limited.

[0050] The electromagnetic coil of the magnetorheological fluid intelligent vibration isolation chassis 19 is arranged in a ring around the magnetorheological fluid layer 14, forming a closed magnetic circuit together with the magnetically conductive frame. Specifically, the magnetically conductive frame is made of stacked silicon steel sheets and surrounds the magnetorheological fluid layer 14. Its preferred shape is a ring to ensure that the magnetic flux can be efficiently conducted in this closed path. When the electromagnetic coil is energized, the magnetic field generated by the current propagates along the path of the magnetically conductive frame, passes through the magnetorheological fluid layer 14, and then returns to the electromagnetic coil, forming a complete closed magnetic circuit. This structure can maximize the effect of the magnetic field on the magnetorheological fluid and improve the performance of the vibration isolation chassis.

[0051] The sensor system includes an accelerometer, a temperature sensor, and a magnetic field sensor. The accelerometer measures vibration acceleration in three directions, with a range of ±50g and an accuracy of 0.01g. The temperature sensor monitors the temperature of the magnetorheological fluid, with a range of -40℃ to 150℃ and an accuracy of ±0.5℃. The magnetic field sensor provides real-time feedback of magnetic field strength, with a range of 0 to 2T and an accuracy of ±0.01T. A matching controller is also provided, which incorporates an adaptive fuzzy PID algorithm. Its specific control logic is as follows:

[0052] 1. Sensors collect vibration data in real time;

[0053] 2. Analyze the vibration spectrum using Fast Fourier Transform (FFT) to identify the main frequency components;

[0054] 3. Based on the preset frequency-current mapping table, output the corresponding current value to the electromagnetic coil;

[0055] 4. Precise current control via PWM modulation, frequency 20kHz, resolution 12-bit, and adjustment of magnetic field strength;

[0056] 5. Forms closed-loop control with a response time of <10ms.

[0057] Frequency-current mapping table (example)

[0058] Vibration frequency (Hz) Control current (A) Corresponding damping coefficient (N・s / m) 10-50 0.5 1500 50-100 1.2 3500 100-200 2.0 6000 200+ 2.5 8000

[0059] Traditional vibration isolation systems are only effective for specific frequencies, such as the natural frequency of a spring damper. However, in this embodiment, the magnetorheological fluid intelligent vibration isolation chassis can dynamically adjust its damping characteristics within the range of 10-500Hz, which has a good suppression effect on both low-frequency pulsation (125Hz) and high-frequency mechanical vibration (200-500Hz) of the sand suction machine.

[0060] The magnetorheological fluid intelligent vibration isolation chassis utilizes the effect of a magnetic field on the magnetorheological fluid to adjust damping. Placing the magnetorheological fluid within the inner ring of a magnetically conductive frame allows the magnetic field generated by energizing the electromagnetic coil to act more concentratedly and efficiently on the magnetorheological fluid through the magnetically conductive frame. During the operation of the sand suction machine, when the vibration sensor detects a vibration signal, the control system adjusts the current in the electromagnetic coil, changing the magnetic field strength. The magnetorheological fluid stably responds to the changes in the magnetic field within the inner ring of the magnetically conductive frame, rapidly changing its viscosity to effectively suppress vibration. By introducing magnetorheological intelligent materials and adaptive control technology, this embodiment solves the problem of poor adaptability to multi-frequency vibrations in traditional vibration isolation systems, achieving intelligent and efficient vibration control.

[0061] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A modular integrated shielding device for noise sources of a sand suction machine, characterized in that, The system includes a box-type frame structure, which comprises an outer frame skeleton formed by connecting steel profiles. The outer frame skeleton is covered with a sound insulation covering. The box-type frame structure contains a noise source integration module and a non-noise source module separated by the sound insulation covering. The noise source integration module is a closed structure, and the non-noise source module is an open frame structure.

2. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, The noise source integration module is a closed structure with soundproofing coverings on the five sides except the bottom.

3. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, The sound insulation covering includes a steel plate, sound-absorbing material, and a positioning mesh cover. The steel plate is a covering layer set on the frame structure. The inner side of the steel plate is filled with sound-absorbing material, and the sound-absorbing material is fixed to the steel plate by the positioning mesh cover.

4. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, The box-type frame structure is equipped with ladders for going up and down and safety belt hook points on the side.

5. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, The four corners on the upper side of the outer frame are provided with quick-connect structures. The quick-connect structures are rectangular and have waist holes on three adjacent exposed surfaces. The waist holes on the three sides are connected inside the quick-connect structures.

6. The integrated modular shielding device for noise sources of a sand suction machine according to claim 3, characterized in that, The sound-absorbing material includes at least one of the following: sound insulation felt, foam, fiberboard, glass wool, rock wool, polyester fiber sound-absorbing cotton, aluminum foam, and mineral wool board.

7. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, A damping and shock absorption device is installed between the bottom foundation of the moving equipment and the outer frame in the noise source integrated module.

8. The integrated modular shielding device for noise sources of a sand suction machine according to claim 7, characterized in that, The damping and vibration reduction device includes an adjustable damping and vibration reduction mechanism formed by a magnetorheological vibration isolation chassis. The magnetorheological vibration isolation chassis is equipped with a magnetorheological fluid layer, a controllable magnetic field winding, and a sensor system. The magnetorheological fluid layer is placed within the magnetic field range of the controllable magnetic field winding. The sensor system collects the real-time vibration frequency of the moving equipment. The controllable magnetic field winding adjusts the magnetic field strength according to the real-time vibration frequency. The change in magnetic field strength changes the damping force of the magnetorheological fluid layer.

9. The integrated modular shielding device for noise sources of a sand suction machine according to claim 1, characterized in that, The box-type frame structure has slots at the bottom for forklifts to lift it. The slots are made of square steel and extend laterally across the noise source integration module and the non-noise source module to form a bottom reinforcing skeleton.

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