Noise reduction foundation pit system with top capable of being automatically folded and unfolded and used for installing large vibration equipment and using method

Abstract

The invention relates to the technical field of building construction, in particular to a noise reduction foundation pit system with the top capable of being automatically folded and unfolded and used for installing large vibration equipment and a using method. And the sound-absorbing roller shutter vertically and automatically extends to the bottom of the foundation pit at the same time, an intelligent opening and closing control system is constructed, and the operation efficiency and convenience are greatly improved. Specifically, the switch cabinet controls the servo motor to rotate so as to drive the winding drum to rotate, then the winding drum drives the pull rope to wind or extend, then the pull rope drives the telescopic hinge to move, the telescopic hinge drives the folding cover plate to fold or unfold, and therefore automatic closing is achieved to prevent noise from spreading outwards.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a noise reduction foundation pit system with a top that can be automatically folded and unfolded for installing large-scale vibration equipment, and a method for using the system. Background Art

[0002] In modern industrial production, large motors are key equipment for testing electrical drive systems on oil drilling rigs. These motors are relatively large, generating vibrations and high-decibel noise during operation. Noise reduction systems for foundation pits are crucial for this purpose. Traditional methods, particularly for noise reduction in foundation pits with automatically opening tops, have numerous limitations and shortcomings.

[0003] Traditional processes rely heavily on manual labor. A typical process involves manually operating a crane to lift several cover plates and place them on top of the foundation pit. This serves as a simple soundproofing measure, dampening the vibration and accompanying high-decibel noise generated by the motors during operation. During equipment maintenance, workers manually operate the crane to lift the cover plates and place them near the pit to complete the equipment inspection. This method has exposed numerous problems in practice. First, the manual operation of the cover plates during lifting poses a safety hazard. Second, conventional foundation pits and cover plates cannot reduce the noise generated by large motors during operation. Daily operation depends largely on the worker's proficiency. Different workers have varying levels of proficiency and consistent technique. This results in inconsistent performance even under the same operating conditions, which can easily lead to uncontrollable safety issues. In terms of vibration and noise reduction structure, the cover plate is made of steel plates and profiles spliced ​​and welded, without any vibration and noise reduction measures, and it is impossible for the side contact and fitting of each cover plate to be completely seamless. During the process of lifting and laying the cover plates, the cover plates are often unevenly placed, resulting in uneven gaps at the junctions between the cover plates and between the cover plates and the foundation pit sealing grooves, which requires workers to manually readjust them and fails to achieve the noise reduction effect; the foundation pit is cast with cement, without any vibration and noise reduction structure, and a large echo is generated in the foundation pit during the operation of the motor, affecting the normal production of other factory areas. This traditional operation is time-consuming and labor-intensive, greatly reducing work efficiency and increasing safety hazards. When the quality of the motor after maintenance is unqualified, rework is an extremely tedious process. Due to the unreasonable design of the traditional process, the occurrence of safety accidents is relatively high, and the foundation pit does not have any vibration reduction and noise reduction measures. During the experiment, the vibration generated by the high-speed operation of the large motor is accompanied by high-decibel noise, which will cause great interference to the experimental plant, other experimental equipment, and surrounding residents. This not only wastes a lot of manpower and time resources, but also requires a lot of energy to deal with the subsequent problems caused by the vibration and noise.

[0004] CN115822289A discloses a foundation pit skylight system capable of sound insulation and noise reduction and a construction method thereof. The skylight system includes a support mechanism, a screen mechanism and a moving mechanism. The support mechanism includes columns and beams. The columns are symmetrically arranged on both sides of the foundation pit. The beams are arranged on the tops of two adjacent columns on the same side. The screen mechanism is arranged above the foundation pit. The screen mechanism includes a fixed pulley, a suspension cable, a support pipe and a screen. The fixed pulley is rotatably arranged on the inner side of the column. The two ends of the suspension cable are respectively fixed to the column through the fixed pulley. The screen is arranged between the two adjacent suspension cables. There are two groups of screens symmetrically arranged, and they extend from both sides of the foundation pit to the middle. There are multiple groups of support tubes, which are evenly distributed on the curtain net. Both ends of the support tubes are provided with connecting rings, which are slidably set on the suspension cables. The curtain net includes mesh and sound-absorbing cotton. The moving mechanism includes a servo motor, a transmission wheel, a moving cable and a moving block. The transmission wheel is rotatably set on the top of the column, and the moving cable is wrapped around the outer surfaces of the two opposite transmission wheels. The moving cable is set above the suspension cables. There are four moving blocks, which are all set in the middle of the moving cable. The moving blocks are fixedly connected to the ends of the two groups of curtain nets in groups of two. The moving blocks are used to drive the curtain net to be folded from the middle of the foundation pit to both sides, or to be unfolded from both sides to the middle.

[0005] Therefore, there is an urgent need for a noise reduction foundation pit system with a top that can automatically fold and unfold for installing large-scale vibration equipment and a method of use to solve the above problems. Summary of the Invention

[0006] In response to the problems in the prior art, the present invention provides a noise reduction foundation pit system and a method of use for installing large-scale vibration equipment, with a top that can be automatically folded and unfolded, so as to overcome the defects of the prior art that the foundation pit cannot reduce noise when the large motor is running, and manual assistance is required when lifting and removing the foundation pit cover and laying the cover for equipment maintenance. The manual laying of the cover is inefficient and poses a safety hazard, and it cannot realize the deficiency of automatically opening and unfolding the cover, and the defect that the foundation pit cover has no noise reduction function.

[0007] The present invention is achieved through the following technical solutions: A noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large vibrating equipment, comprising: Folding cover plate, set at the opening of the foundation pit; The cover driving mechanism includes a support unit and a power unit. The support unit includes two support rods, which are respectively fixed on two opposite inner walls of the foundation pit. The folding cover is connected to the support rods through a telescopic hinge, and the telescopic hinge is slidably connected to the support rods; the power unit includes a servo motor, a reel and a pull rope. The reel is located on an inner wall different from the support rods, the housing of the servo motor is fixed on the inner wall of the foundation pit, and the output shaft of the servo motor is connected to one end of the reel, and the other end of the reel is rotatably connected to the inner wall of the foundation pit; one end of the pull rope is fixed to the reel, and the other end is connected to the telescopic hinge after being wound around the reel; the angular range of the telescopic hinge is 15°~165°; a first travel switch is provided at the end of the support rod close to the reel, and a second travel switch is provided at the end of the support rod away from the reel; Sound-absorbing roller curtains are installed at partitions in the foundation pit; The sound-absorbing roller shutter drive mechanism includes a second support unit and a second power unit. The second support unit includes a roller rod, both ends of which are rotatably mounted on the inner wall of the foundation pit. The top of the sound-absorbing roller shutter is connected to the roller rod, and the bottom is suspended in the air and is provided with an infrared distance sensor. One end of the roller rod is installed as the second power unit and includes a rotary stepping motor. The output shaft of the rotary stepping motor is connected to one end of the roller rod. The switch cabinet, the control end of the servo motor and the control end of the rotary stepping motor are respectively connected to the corresponding control buttons in the switch cabinet, and the output end of the infrared distance sensor, the output end of the first travel switch and the output end of the second travel switch are connected to the input end of the switch cabinet.

[0008] Preferably, the folding cover comprises a plurality of single panels connected by hinges, and the telescopic hinge is arranged between two adjacent single panels.

[0009] Preferably, the single panel includes a frame welded by steel plates and square tubes, and the interior and sides of the frame are filled with glass fiber sound-absorbing cotton; a carbon fiber curtain is set on the cover plate on one side of the frame close to the foundation pit, and the other side is sealed with a perforated metal plate.

[0010] Preferably, the telescopic hinge includes a first support rod, a second support rod, a third support rod and a fourth support rod, the first support rod and the second support rod are respectively fixed on two adjacent single plates, one end of the third support rod is rotatably connected to the first support rod, one end of the fourth support rod is rotatably connected to the second support rod, the other ends of the third support rod and the fourth support rod are rotatably connected, and the two are combined to form a bottom structure, and the bottom structure is slidably connected to the support rod.

[0011] Preferably, the first support rod and the third support rod are rotationally connected through a first intermediate shaft, the length axis of the first intermediate shaft is parallel to the length axis of the support rod, and the first intermediate shaft is provided with a first center hole along its length axis; the second support rod and the third support rod are connected through a second intermediate shaft, and the second intermediate shaft is provided with a second center hole; the stretch rod passes through the first center hole and the second center hole of each telescopic hinge, and is fixed after the last second center hole.

[0012] Preferably, a positioning wheel is provided at the end of the telescopic hinge close to the support rod, a sliding groove is provided on the support rod, the positioning wheel is located in the sliding groove, and slides along the longitudinal axis of the sliding groove.

[0013] Preferably, detachably connected limit blocks are provided at both ends of the slide groove.

[0014] Preferably, a steel frame structure is installed on the inner wall of the foundation pit, the interior of the steel frame is filled with glass fiber sound-absorbing cotton, and a carbon fiber curtain is set on the surface of the steel frame structure.

[0015] Preferably, a folding button and an unfolding button are provided in the control switch cabinet, the output ends of the folding button and the unfolding button are connected to the control end of the servo motor, the input end of the folding switch is connected to the output end of the first travel switch, and the input end of the unfolding button is connected to the output end of the second travel switch.

[0016] Preferably, a winding button and an extending button are provided in the switch cabinet, and the output ends of the winding button and the extending button are connected to the control end of the stepping rotary motor; the output end of the infrared distance sensor is connected to the winding button and the extending button in the control switch cabinet.

[0017] A method for using a noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large vibrating equipment, comprising: The output end of the switch cabinet sends a folding signal. After receiving the signal, the servo motor controls the drum to rotate clockwise. The drum drives the pull rope to wind. The pull rope pulls the telescopic hinge to slide along the support rod. The folding cover folds until the telescopic hinge is 15 degrees. At this time, the telescopic hinge contacts the first travel switch. The first travel switch sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the servo motor. The output end of the switch cabinet sends an expansion signal. After receiving the signal, the servo motor controls the drum to rotate counterclockwise, the pull rope is relaxed, and the folding cover pushes the telescopic hinge to slide along the support rod under the action of its own weight. The folding cover unfolds until the telescopic hinge is 165 degrees. At this time, the telescopic hinge contacts the second travel switch, and the second travel switch sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the servo motor. The output end of the switch cabinet sends a winding signal. After receiving the signal, the rotary stepper motor of the sound-absorbing roller curtain controls the sound-absorbing roller curtain to rotate clockwise. The rotary stepper motor drives the sound-absorbing roller curtain to wind, and the sound-absorbing roller curtain gradually shrinks. When the sound-absorbing roller curtain is 1 meter away from the winding rod, the infrared distance sensor sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the rotary stepper motor. The output end of the switch cabinet sends an extension signal. After receiving the signal, the rotary stepper motor of the sound-absorbing roller curtain controls the sound-absorbing roller curtain to rotate counterclockwise. The sound-absorbing roller curtain extends under the rotation of the rotary stepper motor and its own weight. When the sound-absorbing roller curtain is 0 meters from the ground, the infrared distance sensor sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the rotary stepper motor.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large vibrating equipment. The system utilizes a servo motor drive system, a coordinated telescopic hinge transmission mechanism, and a pull rope traction device to achieve automated folding and unfolding of the foundation pit cover. A rotary stepper motor is also used to drive a sound-absorbing roller curtain to wind, retract, or extend vertically, creating an intelligent opening and closing control system that significantly improves operational efficiency and convenience. Specifically, a switch cabinet controls the rotation of the servo motor, thereby driving a reel to rotate. The reel, in turn, drives a pull rope to wind or extend. The pull rope then drives the telescopic hinge, which in turn drives the foldable cover to fold or unfold. The switch cabinet also controls the rotation of the rotary stepper motor, thereby driving the sound-absorbing roller curtain to wind, retract, or extend vertically. This system achieves automatic closure to block noise transmission while ensuring access for personnel. When the large motor needs to be hoisted to the outside, the cover system on top of the foundation pit automatically opens and folds, eliminating the need for manual adjustment. This effectively meets the noise reduction requirements of the electrical drive power system of oil drilling rigs.

[0019] Furthermore, the folding cover panels are foldable. Each panel consists of a welded steel plate and square tube frame, with glass fiber sound-absorbing foam filling the interior and sides. The cover is made of perforated metal, giving the panels a sound-absorbing function. Furthermore, to minimize outward noise transmission, a carbon fiber curtain automatically unfolds beneath the cover panel once it seals the top of the pit. Once unfolded, the curtain and the air space between it and the cover panel effectively block motor noise within the pit.

[0020] Furthermore, the telescopic hinge is used to connect multiple single plates in the folding cover, and each rod is connected through an intermediate shaft with a mounting hole. The pull rope passes through all the intermediate shafts in sequence to realize the linkage of all the folding covers.

[0021] Furthermore, the positioning wheel can reduce the sliding friction between the telescopic hinge and the support rod, making it easier for the telescopic hinge to slide. The positioning wheel cooperates with the slide groove to reduce friction when the cover is folded or unfolded.

[0022] Furthermore, the limit block is used to prevent the positioning wheel from sliding out of the slide groove.

[0023] Furthermore, steel frame structures are installed around the foundation pit, close to the side walls and the ground. The interior of the steel frame is filled with glass fiber sound-absorbing cotton, and the surface is equipped with carbon fiber curtain roller shutters to form an air wall. The double sound-absorbing design can block the spread of motor noise.

[0024] Furthermore, the sound-absorbing roller curtain has a wrap-and-stretch function, which allows it to absorb sound when extended. To minimize the accumulation and transmission of noise from large equipment within the pit, when the sound-absorbing roller curtain is extended, conical honeycomb holes are installed on the surface facing the inside of the pit to eliminate motor noise within the pit.

[0025] The present invention provides a method for using a noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large vibrating equipment. When the cover is folded, the switch cabinet sends a folding signal to the servo motor. After the servo motor is energized, it drives the drum to rotate clockwise and wind the rope, causing the telescopic hinge to slide along the support rod until the folding cover is folded. When the cover is unfolded, the switch cabinet sends an unfolding signal to the servo motor. After the servo motor is energized, it drives the drum to rotate counterclockwise to release the rope. The cover, under its own weight, compresses the telescopic hinge and slides along the support rod until the folding cover is unfolded. When the sound-absorbing roller curtain is wound, the switch cabinet sends a winding signal. After receiving the signal, the rotary stepper motor controls the sound-absorbing roller curtain to rotate clockwise. The rotary stepper motor drives the sound-absorbing roller curtain to wind until the bottom of the roller curtain is 1 meter from the winding rod, completing the winding. When the sound-absorbing roller curtain is extended, the switch cabinet sends an extension signal. After receiving the signal, the rotary stepper motor controls the sound-absorbing roller curtain to rotate counterclockwise. The rotary stepper motor drives the sound-absorbing roller curtain to extend until the bottom of the roller curtain is 0 meters from the ground, completing the extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a noise reduction foundation pit system with a top that can be automatically folded and unfolded for installing large-scale vibration equipment according to the present invention; Figure 2 This is a schematic diagram of a telescopic hinge structure in a noise reduction foundation pit system with a top that can automatically fold and unfold for installing large-scale vibration equipment according to the present invention; Figure 3 This is a schematic diagram of a cover structure in a noise reduction foundation pit system with a top that can be automatically folded and unfolded for installing large-scale vibration equipment in an embodiment of the present invention; Figure 4The present invention is a schematic diagram of a sound-absorbing roller shutter structure in a noise reduction foundation pit system with a top that can be automatically folded and unfolded for installing large-scale vibration equipment in an embodiment of the present invention. In the figure, 1. cover plate; 2. hinge; 3. telescopic hinge; 4. positioning wheel; 5. slide; 6. support rod; 7. pull rope; 8. reel; 9. servo motor; 10. earring; 11. earring seat; 12. glass fiber sound-absorbing cotton; 13. foundation pit; 14. carbon fiber curtain; 15. sound-absorbing roller curtain; 16. rotary stepping motor; 17. fixed beam; 18. infrared distance sensor; 19. installation shell. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so as to provide a thorough and complete disclosure of the present invention and fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments shown in the accompanying drawings is not intended to limit the present invention. In the accompanying drawings, identical elements are denoted by the same reference numerals.

[0029] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0030] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0031] The present invention discloses a noise reduction foundation pit system for installing large-scale vibration equipment, the top of which can be automatically folded and unfolded. Figures 1 to 4 ,include: The folding cover plate 1 is arranged at the opening of the foundation pit 13; the folding cover plate 1 includes a plurality of single plates connected by hinges 2, and a telescopic hinge 3 is arranged between two adjacent single plates. In a certain embodiment, the single plate includes a frame welded by steel plates and square tubes, and the interior and sides of the frame are filled with glass fiber sound-absorbing cotton 12; a carbon fiber curtain 14 is provided on the cover plate 1 on one side of the frame close to the foundation pit 13, and a perforated metal plate is used for sealing the other side. The perforated metal plate is used for sealing, so that the cover plate 1 has a sound-absorbing function, and a carbon fiber curtain 14 is installed at the bottom of the cover plate 1. An air wall is formed between the carbon fiber curtain 14 and the cover plate 1, which can effectively block part of the noise. The steel plate-square tube welded frame cover plate 1 is hinged to the earring seat 11 through the earring 10 connector to ensure structural strength and sealing, while meeting the equipment lifting space requirements and personnel load passage requirements.

[0032] In a certain embodiment, an earring seat 11 is also provided on the inner wall of one side of the foundation pit 13 where the reel 8 is provided. The earring seat 11 cooperates with the earring 10 on the cover plate 1. If the earring seat 11 is provided with a perforation, it is assembled with the earring 10 on the cover plate 1 through a pin shaft so that the earring 10 can cooperate with the earring seat 11 and rotate smoothly.

[0033] In a certain embodiment, the cover 1 driving mechanism includes a support unit and a power unit, the support unit includes two support rods 6, the two support rods 6 are respectively fixed on two opposite inner walls of the foundation pit 13, the folding cover 1 is connected to the support rod 6 through a telescopic hinge 3, and the telescopic hinge 3 is slidingly connected to the support rod 6; the power unit includes a switch cabinet, a servo motor 9, a reel 8 and a pull rope 7, the output end of the switch cabinet is connected to the control end of the servo motor 9, the reel 8 is located on an inner wall different from the support rod 6, the housing of the servo motor 9 is fixed on the inner wall of the foundation pit 13, and the output shaft of the servo motor 9 is connected to one end of the reel 8, and the other end of the reel 8 is rotatably connected to the inner wall of the foundation pit 13; one end of the pull rope 7 is fixed on the reel 8, and the other end is connected to the telescopic hinge 3 after being wrapped around the reel 8.

[0034] In one embodiment, referring to Figure 2 The telescopic hinge 3 includes a first support rod, a second support rod, a third support rod and a fourth support rod. The first support rod and the second support rod are respectively fixed on two adjacent single plates. One end of the third support rod is rotatably connected to the first support rod, one end of the fourth support rod is rotatably connected to the second support rod, and the other ends of the third support rod and the fourth support rod are rotatably connected, and the two are combined to form a bottom structure, which is slidably connected to the support rod 6.

[0035] In one embodiment, the telescopic hinge 3 has an active angle range of 15° to 165°, that is, when the folding cover 1 is folded, the angle between the first support rod and the second support rod is 15°; when the folding cover 1 is unfolded, the angle between the two is 165°.

[0036] In a certain embodiment, the first support rod and the third support rod are rotationally connected through a first intermediate shaft, the length axis of the first intermediate shaft is parallel to the length axis of the support rod 6, and the first intermediate shaft is provided with a first center hole along its length axis; the second support rod and the third support rod are connected through a second intermediate shaft, and a second center hole is provided on the second intermediate shaft; the stretcher passes through the first center hole and the second center hole of each telescopic hinge 3, and is fixed after the last second center hole.

[0037] In one embodiment, a positioning wheel 4 is provided at the end of the telescopic hinge 3 near the support rod 6. A chute 5 is defined in the support rod 6. The positioning wheel 4 is located in the chute 5 and slides along the longitudinal axis of the chute 5. The positioning wheel 4 travels on the support rod 6 on the inner wall of the foundation pit 13. The positioning wheel 4 drives a reel 8 via a servo motor 9 to pull a pull rope 7 that passes through the central axis hole of the telescopic hinge 3, automatically controlling the folding and extension of the cover 1. When the servo motor 9 rotates the deployment rope 7 counterclockwise, the cover 1, under its own weight, drives the positioning wheel 4 of the telescopic hinge 3 to slide and unfold in the chute 5. When the telescopic hinge 3 is extended to 165 degrees, the cover 1 stops expanding, sealing the upper portion of the foundation pit 13. When the servo motor 9 rotates clockwise to retract the drawstring 7, the drawstring 7 drives the telescopic hinge 3 to slowly close. Simultaneously, the positioning wheel 4 slides along the chute 5, and the cover 1 begins to fold and retract. When the telescopic hinge 3 closes to 15 degrees, the cover 1 stops retracting, and the large motor in the foundation pit 13 can be lifted to the outside of the foundation pit 13. When the telescopic hinge 3 is working, the positioning wheel 4 moves quickly and accurately within the chute 5 to adjust its posture, achieving smooth folding and unfolding of the cover 1. The flexible connection also reduces friction and wear between components, extending the service life of the telescopic hinge 3.

[0038] In one embodiment, both ends of the slide groove 5 are provided with detachably connected limit blocks.

[0039] In one embodiment, a steel frame structure is installed on the inner wall of the foundation pit 13. The steel frame is filled with glass fiber sound-absorbing cotton 12, and the surface of the steel frame structure is provided with a carbon fiber curtain 14. Specifically, the foundation pit 13 includes a steel frame structure installed on all four sides, close to the side walls and the ground. The steel frame is filled with glass fiber sound-absorbing cotton 12. At the same time, the carbon fiber curtain 14 is provided on the surface to form an air wall between the glass fiber sound-absorbing cotton 12 and the adjacent cover plate 1. This dual sound-absorbing design can block the transmission of motor noise.

[0040] In one embodiment, a first travel switch is provided at the end of the support rod 6 near the reel 8, and a second travel switch is provided at the end of the support rod 6 away from the reel 8. A folding button and an unfolding button are provided in the control switch cabinet. The outputs of the folding and unfolding buttons are both connected to the control terminal of the servo motor 9. The input of the folding switch is connected to the output of the first travel switch, and the input of the unfolding button is connected to the output of the second travel switch. The first and second travel switches work in conjunction with mechanical limit blocks to achieve a dual protection mechanism. This, combined with the telescopic hinge 3 to stabilize the support structure, effectively mitigates the risk of over-limit movement of the cover 1. Furthermore, the automatic opening and closing function reduces manual operation, reduces the risk of high-altitude work and mechanical injuries, and comprehensively ensures the safety of personnel and equipment.

[0041] Reference Figure 4 The sound-absorbing roller curtain 15 is also constructed from carbon fiber and installed at a partition within the foundation pit 13. The surface of the roller curtain facing the inside of the foundation pit is provided with conical honeycomb holes to eliminate motor noise within the pit. The sound-absorbing roller curtain drive mechanism includes a second support unit and a second power unit. The second support unit includes a winding rod, both ends of which are rotatably mounted on the inner wall of the foundation pit 13. The top of the sound-absorbing roller curtain 15 is connected to the winding rod, while the bottom is suspended in the air and is equipped with an infrared distance sensor 18. One end of the winding rod is mounted as the second power unit, which includes a rotary stepping motor 16. The output shaft of the rotary stepping motor 16 is connected to one end of the winding rod. When the sound-absorbing roller curtain 15 is wound, the switch cabinet sends a winding signal, and the rotary stepping motor 16 rotates clockwise after receiving the signal. The rotary stepping motor 16 drives the sound-absorbing roller curtain 26 to wind until the bottom of the attraction roller curtain 15 is 1 meter away from the winding rod, and the winding is completed; when the sound-absorbing roller curtain 15 is extended, the switch cabinet sends an extension signal, and the rotary stepping motor 16 rotates counterclockwise after receiving the signal, and the rotary stepping motor 16 drives the sound-absorbing roller curtain 15 to extend until the bottom of the attraction roller curtain 15 is 0 meters away from the ground, and the extension is completed.

[0042] In one embodiment, the inner wall of the partition at the foundation pit 13 is grooved along the depth of the pit. Guide rods are positioned within the grooves. The sides of the sound-absorbing roller curtain 15 are secured by clamps, and pulleys are provided between the clamps and the guide rods for sliding connection. A fixed beam 17 is mounted on the tops of the two guide rods. A mounting housing 19 for the sound-absorbing roller curtain 15 is affixed to the fixed beam 17. Both ends of the roller rod are rotatably connected to the mounting housing 19. One end of the roller rod extends beyond the mounting housing 19 and connects to the output shaft of the rotary stepper motor 16.

[0043] The present invention relates to a noise reduction pit system and a method for using the top of a large-scale vibration equipment that can be automatically folded and unfolded. The system comprises a cover plate 1, a telescopic hinge 3, a servo motor 9, a positioning wheel 4, a slide 5, a pull rope 7, a reel 8, and a servo motor 9. When the servo motor 9 rotates counterclockwise to unfold the pull rope 7, the cover plate 1 drives the positioning wheel 4 of the telescopic hinge 3 to slide in the slide 5 by its own gravity and begins to unfold. When the telescopic hinge 3 is unfolded to 165 degrees, the cover plate 1 stops unfolding and the rotary stepping motor 16 rotates clockwise at the same time, and the sound-absorbing roller curtain 15 is extended until the sound-absorbing roller curtain 15 is extended. The bottom of the sound-absorbing roller curtain 15 is extended after it is 0 meters away from the ground; and the upper part of the foundation pit 13 and each large equipment in the foundation pit are closed. When the servo motor 9 rotates clockwise to retract the pull rope 7, the pull rope 7 drives the telescopic hinge 3 to slowly close. At the same time, the positioning wheel 4 slides along the slide groove 5, and the cover 1 begins to fold and retract. When the telescopic hinge 3 is closed to 15°, the cover 1 stops retracting, and the rotating stepper motor 16 rotates counterclockwise at the same time, and the sound-absorbing roller curtain 15 is wound. When the bottom of the sound-absorbing roller curtain 15 is 1 meter away from the winding rod, the winding is completed. At this time, the large motor in the foundation pit 13 can be lifted.

[0044] During operation, the positioning wheel 4 at the bottom of the telescopic hinge 3 stably supports the cover 1, and the telescopic hinge 3 ensures a stable state within a certain range, preventing the cover 1 from shaking or the telescopic hinge 3 from accidentally deforming, thereby ensuring the smooth folding or stretching of the cover 1. The telescopic hinge 3 can realize the automatic folding or unfolding of the cover 1 by sliding the positioning wheel 4 on the slide 5. During operation, there is no need to manually adjust the mechanical structure of the cover 1 to adapt. It is only necessary to give the servo motor 9 a folding or unfolding signal through the control box. The servo motor 9 drives the reel 8 to automatically pull or loosen the rope 7 to drive the cover 1 to move to the corresponding position. The positioning wheel 4 slides in the slide 5 and cooperates with the travel switch to automatically adjust the opening degree of the telescopic hinge 3, thereby achieving stable support for the unfolding or folding process of the cover 1. No manual adjustment is required, which well meets the needs of the noise reduction pit 13 system that can automatically open and close the top of large-scale vibration equipment.

[0045] The present invention is based on a servo motor 9 drive system, coordinated with the telescopic hinge 3 transmission mechanism and the pull rope 7 traction device, to achieve the automatic folding and unfolding of the foundation pit 13 cover plate 1, build an intelligent opening and closing control system, and greatly improve operational efficiency and convenience. At the same time, a composite noise reduction structure of glass fiber silencer cotton 12 sound absorption and carbon fiber curtain 14 sound insulation is used, combined with the perforated metal plate resonance sound absorption design, to build a multi-dimensional noise reduction system, significantly reducing the noise pollution of equipment operation. It also adopts a positioning wheel 4-slide 5 guide mechanism and a limit block combination, and cooperates with the telescopic hinge 3 diamond-shaped stable structure to achieve precise control of the movement trajectory of the cover plate 1 and ensure the stability and reliability of the system operation. The various components of the system use standardized interfaces to achieve modular assembly of the cover plate 1, hinges, drive devices, etc., which is convenient for rapid on-site installation and debugging, significantly shortens the construction period, and improves the efficiency of project implementation. It also reduces mechanical wear and failure risks, extends the service life of the equipment, and effectively reduces the operation and maintenance costs of the entire life cycle through the application of highly wear-resistant positioning wheels 4, corrosion-resistant metal profiles and maintenance-free servo drive systems.

[0046] Specifically, the pull ropes 7 passing through the telescopic hinges 3 at both ends of all cover plates 1 are respectively connected to the reels 8 at both ends driven by the servo motor 9, and the other ends of the pull ropes 7 are fixed to the end hinges. The entire connection process is simple and efficient to operate, and no additional complicated operating steps are required. The top cover plate 1 of the large-scale vibration equipment can be opened and closed quickly and automatically, which facilitates the flexible deployment of equipment in the foundation pit 13 according to production arrangements in the automation process.

[0047] The present invention also discloses a method for using a noise reduction foundation pit system with a top that can be automatically folded and unfolded for installing large-scale vibration equipment, comprising: Pressing the folding button in the switch cabinet sends a folding signal. After receiving the signal, the servo motor 9 controls the reel 8 to rotate clockwise. The reel 8 drives the pull rope 7 to wind. The pull rope 7 pulls the telescopic hinge 3 to slide along the support rod 6, and the folding cover 1 folds. When the positioning wheel 4 slides in the slide groove 5 and touches the first travel switch, the first travel switch sends a folding stop signal to the control cabinet. The control cabinet sends a stop signal to the servo motor 9. The servo motor 9 stops running, and the cover 1 is in the open state. The crane can lift large equipment in the foundation pit 13. Pressing the deploy button in the switch cabinet sends a deploy signal. The servo motor 9 receives the signal and controls the drum 8 to rotate counterclockwise. This loosens the pull cord 7, and the folding cover 1, under its own weight, pushes the telescopic hinge 3 along the support rod 6, unfolding the folding cover 1. When the positioning wheel 4 slides within the chute 5 and touches the second travel switch, the second travel switch sends a stop signal to the control cabinet, which in turn sends a stop signal to the servo motor 9, which stops the servo motor 9 and fully deploys the cover 1.

[0048] The output end of the switch cabinet sends a winding signal. After receiving the signal, the rotary stepper motor 16 of the sound-absorbing roller curtain 15 controls the sound-absorbing roller curtain 15 to rotate clockwise. The rotary stepper motor 16 drives the sound-absorbing roller curtain 15 to wind, and the sound-absorbing roller curtain 15 gradually shrinks. When the sound-absorbing roller curtain 15 is 1 meter away from the winding rod, the infrared distance sensor 18 sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the rotary stepper motor 16. The output end of the switch cabinet sends an extension signal. After receiving the signal, the rotary stepper motor 16 of the sound-absorbing roller curtain 15 controls the sound-absorbing roller curtain 15 to rotate counterclockwise. The sound-absorbing roller curtain 15 extends under the rotation of the rotary stepper motor 16 and the action of its own weight. When the sound-absorbing roller curtain 15 is 0 meters from the ground, the infrared distance sensor 18 sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the rotary stepper motor 16.

[0049] The present invention provides a method for using a noise reduction pit 13 system with an automatically openable top for installing large-scale vibrating equipment. By automatically controlling the clockwise and counterclockwise rotation of the reel 8 of the servo motor 9, the telescopic hinge 3 slides on the slide 5 to achieve the folding and unfolding of the cover 1. The opening range and speed of the cover 1 can be precisely controlled so that the cover 1 does not affect the lifting of the equipment after folding and the height matches the sealed pit 13 after unfolding. The system can basically eliminate the vibration generated by the high-speed operation of the large motor and the accompanying high-decibel noise and interference with the experimental plant, other experimental equipment, and surrounding residents. At the same time, the stable folding and unfolding action can avoid collision damage to the cover 1 itself or surrounding equipment due to excessive or unstable movement of the cover 1, thereby ensuring the safety of the production process and the normal operation of the equipment.

[0050] At the same time, by rotating the stepper motor 16 and the infrared sensing sensor 18, when the sound-absorbing roller curtain 15 is wound, the switch cabinet sends a winding signal, and the rotating stepper motor 16 controls the sound-absorbing roller curtain to rotate clockwise after receiving the signal. The stepper motor drives the sound-absorbing roller curtain to wind until the bottom of the roller curtain is 1 meter away from the winding rod and completes the winding, which can meet the maintenance and installation space of large equipment; when the sound-absorbing roller curtain is extended, the switch cabinet sends an extension signal, and the rotating stepper motor 16 controls the sound-absorbing roller curtain 15 to rotate counterclockwise after receiving the signal, and the rotating stepper motor 16 drives the sound-absorbing roller curtain 15 to extend until the bottom of the roller curtain is 0 meters away from the ground and completes the extension, which can not only further enhance the sound absorption and noise reduction effect, but also does not affect the equipment lifting inside the foundation pit.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large-scale vibrating equipment, characterized in that: include: A folding cover plate (1) is arranged at the opening of the foundation pit (13), the folding cover plate (1) comprising a plurality of single plates connected by hinges (2), and a telescopic hinge (3) is arranged between two adjacent single plates; The cover driving mechanism comprises a first support unit and a second power unit, wherein the first support unit comprises two support rods (6), the two support rods (6) are respectively fixed on two opposite inner walls of a foundation pit (13), the folding cover (1) is connected to the support rods (6) via a telescopic hinge (3), and the telescopic hinge (3) is slidably connected to the support rods (6); the first power unit comprises a servo motor (9), a reel (8) and a pull rope (7), the reel (8) is located on an inner wall different from the support rods (6), and the housing of the servo motor (9) is fixed. On the inner wall of the foundation pit (13), the output shaft of the servo motor (9) is connected to one end of the reel (8), and the other end of the reel (8) is rotatably connected to the inner wall of the foundation pit (13); one end of the pull rope (7) is fixed to the reel (8), and the other end is wound around the reel (8) and connected to the telescopic hinge (3); the telescopic hinge (3) has an active angle range of 15° to 165°; a first travel switch is provided at one end of the support rod (6) close to the reel (8), and a second travel switch is provided at one end of the support rod (6) away from the reel (8); A sound-absorbing roller curtain (15) is arranged at a partition in the foundation pit (13); The sound-absorbing roller curtain driving mechanism comprises a second support unit and a second power unit, wherein the second support unit comprises a roller rod, both ends of which are rotatably mounted on the inner wall of a foundation pit (13), the top of the sound-absorbing roller curtain (15) is connected to the roller rod, the bottom is suspended in the air, and an infrared distance sensor (18) is provided; one end of the roller rod is mounted as the second power unit and comprises a rotary stepping motor (16), the output shaft of the rotary stepping motor (16) is connected to one end of the roller rod; The switch cabinet, the control end of the servo motor (9) and the control end of the rotary stepping motor (16) are respectively connected to corresponding control buttons in the switch cabinet, and the output end of the infrared distance sensor (18), the output end of the first travel switch and the output end of the second travel switch are connected to the input end of the switch cabinet.

2. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 1 is characterized in that: The single plate comprises a frame welded by steel plates and square tubes, the interior and sides of the frame are filled with glass fiber sound-absorbing cotton (12); a carbon fiber curtain (14) is set on the cover plate (1) on one side of the frame close to the foundation pit (13), and the other side is sealed with a perforated metal plate.

3. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 2, characterized in that: The telescopic hinge (3) comprises a first support rod, a second support rod, a third support rod and a fourth support rod, wherein the first support rod and the second support rod are respectively fixed to two adjacent single plates, one end of the third support rod is rotatably connected to the first support rod, one end of the fourth support rod is rotatably connected to the second support rod, and the other ends of the third support rod and the fourth support rod are rotatably connected, and the two are combined to form a bottom structure, and the bottom structure is slidably connected to the support rod (6).

4. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 3, characterized in that: The first support rod and the third support rod are rotatably connected via a first intermediate shaft, the longitudinal axis of the first intermediate shaft is parallel to the longitudinal axis of the support rod (6), and the first intermediate shaft is provided with a first center hole along its longitudinal axis; the second support rod and the third support rod are connected via a second intermediate shaft, and the second intermediate shaft is provided with a second center hole; the stretching member passes through the first center hole and the second center hole of each telescopic hinge (3), and is fixed after the last second center hole.

5. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibration equipment according to claim 1, characterized in that: A positioning wheel (4) is provided at the end of the telescopic hinge (3) close to the support rod (6). A sliding groove (5) is provided on the support rod (6). The positioning wheel (4) is located in the sliding groove (5) and slides along the longitudinal axis of the sliding groove (5).

6. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 5, characterized in that: Both ends of the slide groove (5) are provided with detachably connected limit blocks.

7. The noise reduction foundation pit system with automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 1, characterized in that: A steel frame structure is installed on the inner wall of the foundation pit (13), the interior of the steel frame is filled with glass fiber sound-absorbing cotton (12), and a carbon fiber curtain (14) is arranged on the surface of the steel frame structure.

8. The noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 1, characterized in that: A folding button and an unfolding button are provided in the switch cabinet. The output ends of the folding button and the unfolding button are both connected to the control end of the servo motor (9). The input end of the folding switch is connected to the output end of the first travel switch, and the input end of the unfolding button is connected to the output end of the second travel switch.

9. The noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large-scale vibrating equipment according to claim 1, characterized in that: A winding button and an extension button are provided in the switch cabinet, and the output ends of the winding button and the extension button are connected to the control end of the stepping rotary motor (16); the output end of the infrared distance sensor (18) is connected to the winding button and the extension button in the control switch cabinet.

10. A method for using a noise reduction foundation pit system with an automatically foldable and unfoldable top for installing large-scale vibrating equipment, characterized in that: include: The output end of the switch cabinet sends a folding signal, and the servo motor (9) controls the reel (8) to rotate clockwise after receiving the signal, and the reel (8) drives the pull rope (7) to be wound, and the pull rope (7) pulls the telescopic hinge (3) to slide along the support rod (6), and the folding cover (1) folds until the telescopic hinge (3) is 15 degrees. At this time, the telescopic hinge (3) contacts the first travel switch, and the first travel switch sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the servo motor (9); The output end of the switch cabinet sends an expansion signal, and after receiving the signal, the servo motor (9) controls the reel (8) to rotate counterclockwise, the pull rope (7) is loosened, and the folding cover (1) pushes the telescopic hinge (3) to slide along the support rod (6) under the action of its own weight, and the folding cover (1) performs an expansion action until the telescopic hinge (3) is 165 degrees. At this time, the telescopic hinge (3) contacts the second travel switch, and the second travel switch sends a signal to the switch cabinet. After receiving the signal, the switch cabinet sends a stop signal to the servo motor (9); The output end of the switch cabinet sends a winding signal, and the rotary stepper motor (16) of the sound-absorbing rolling curtain (15) controls the sound-absorbing rolling curtain (15) to rotate clockwise after receiving the signal. The rotary stepper motor (16) drives the sound-absorbing rolling curtain (15) to wind, and the sound-absorbing rolling curtain (15) gradually shrinks. When the sound-absorbing rolling curtain (15) is 1 meter away from the rolling rod, the infrared distance sensor (18) sends a signal to the switch cabinet, and the switch cabinet sends a stop signal to the rotary stepper motor (16) after receiving the signal. The output end of the switch cabinet sends an extension signal, and the rotary stepper motor (16) of the sound-absorbing roller curtain (15) controls the sound-absorbing roller curtain (15) to rotate counterclockwise after receiving the signal. The sound-absorbing roller curtain (15) extends under the rotation of the rotary stepper motor (16) and the action of its own weight; when the sound-absorbing roller curtain (15) is at a position of 0 meters from the ground, the infrared distance sensor (18) sends a signal to the switch cabinet, and the switch cabinet sends a stop signal to the rotary stepper motor (16) after receiving the signal.

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