Sound acquisition device for security of main equipment of transformer substation

Abstract

The invention relates to the technical field of sound wave detection devices, in particular to a device for measuring the sound wave velocity of main equipment of a transformer substation, which is used for solving the problem that sound waves emitted by the main equipment are difficult to directionally receive in a complicated electromagnetic environment and a noise background of the transformer substation. The box body is provided with a port, a vibrating diaphragm is connected in the port, a plurality of vibrating sensors in contact with the vibrating diaphragm are connected in the box body, when sound waves are transmitted to the vibrating diaphragm, the vibrating diaphragm vibrates, and after the plurality of vibrating sensors sense the vibration of the vibrating diaphragm in sequence, the port of the box body swings towards the direction of the vibrating sensor which senses the vibration first; the port of the box body directly faces the sound source; a sound wave acquisition mechanism is arranged on the box body, and when the port of the box body directly faces the sound source, the sound wave acquisition mechanism is started; and through the sound source positioning mechanism and the sound wave acquisition mechanism, reliable data support is provided for monitoring the operation state of the main equipment of the transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid security, and in particular to a sound collection device for the security of main equipment in a transformer substation. Background Art

[0002] In large-scale power grids, substations are key nodes for power transmission and distribution, and their operational stability and safety are of vital importance. The main equipment of substations, such as transformers, circuit breakers, disconnectors, etc., will produce certain sounds during normal operation, and these sounds often contain information about the operating status of the equipment. However, with the expansion of the scale of the power grid and the aging of equipment, the main equipment of substations may experience abnormal vibrations or noises for various reasons. These abnormal signals are often precursors to equipment failures. If they are not discovered and handled in time, they may cause more serious power accidents.

[0003] In the large-scale power grid security, monitoring methods mainly rely on manual inspections and regular maintenance. This method is not only inefficient, but also difficult to capture sudden and instantaneous abnormal signals during equipment operation. Therefore, it is particularly important to develop an intelligent monitoring device that can monitor the sound signals of the main equipment of the substation in real time and accurately judge the operating status of the equipment.

[0004] As a non-contact monitoring method, sound wave velocity measurement technology has been widely used in the fields of mechanical fault diagnosis and environmental noise monitoring. However, in the complex electromagnetic environment and noise background of substations, how to accurately locate the sound signals emitted by the main equipment of substations has become an urgent problem to be solved. Summary of the invention

[0005] The present invention provides a sound collection device for security of main equipment of a substation, so as to solve the problem that the sound waves emitted by the main equipment are difficult to be received directionally under the complex electromagnetic environment and noise background of the substation.

[0006] In order to alleviate the above technical problems, the technical solution provided by the present invention is: A sound collection device for security of main equipment in a substation, comprising a sound source positioning mechanism, the sound source positioning mechanism comprising a box, the box having a port and a vibrating membrane connected inside the port, a plurality of vibration sensors in contact with the vibrating membrane connected inside the box, when sound waves are transmitted to the vibrating membrane, the vibrating membrane vibrates, and after the plurality of vibration sensors successively sense the vibration of the vibrating membrane, the port of the box swings toward the direction of the vibration sensor that senses the vibration first, so that the port of the box faces the sound source; The box body is provided with a sound wave collecting mechanism, and when the port of the box body faces the sound source, the sound wave collecting mechanism is started.

[0007] Furthermore, it also includes a steering mechanism, which includes a base, a turntable is rotatably connected to the base, an electric turning rod is connected to the turntable, the top of the electric turning rod is hinged to the box, an electric telescopic rod is hinged to the turntable, and the end of the electric telescopic rod is hinged to the box.

[0008] Furthermore, the sound wave collection mechanism includes a first rotating frame, a sound wave collector is connected to the middle of the first rotating frame, a positioning block is connected to the side wall of the box, the positioning block can abut against the first rotating frame, and after the port of the box is facing the sound source, the first rotating frame swings and contacts the positioning block so that the sound wave collector is located in the middle of the port of the box.

[0009] Furthermore, the box body is also provided with a pushing mechanism for controlling the swing of the first rotating frame, the pushing mechanism includes an arc-shaped piston cylinder, an arc-shaped piston rod is slidably connected inside the arc-shaped piston cylinder, the arc-shaped piston cylinder is connected to the box body, the arc-shaped piston rod is connected to the first rotating frame, and the arc-shaped piston rod can push the first rotating frame to swing when sliding.

[0010] Furthermore, the pushing mechanism further comprises an insertion rod, and the insertion rod is inserted into the arc-shaped piston cylinder; A limit plate is connected to the insertion rod, a spring is connected between the limit plate and the arc-shaped piston cylinder, an electromagnet is connected to the outer wall of the box body and is electrically connected in series with the electric rotating rod, when the port of the box body is not facing the sound source, the electric rotating rod is energized so that the electromagnet attracts the insertion rod so that the insertion rod is inserted into the arc-shaped piston cylinder, and, when the port of the box body is facing the sound source, the electric rotating rod is de-energized so that the electromagnet is demagnetized, so that the spring pushes the insertion rod to pull out the arc-shaped piston cylinder, so that external air can enter the arc-shaped piston cylinder.

[0011] Furthermore, the box body is provided with a locking mechanism for locking the relative position of the electric rotating rod and the base, and the locking mechanism includes a first cylinder and a second cylinder, the first cylinder is connected to the box body, and the second cylinder is connected to the base, and the first rotating frame swings and squeezes the first cylinder so that the air in the first cylinder is transmitted to the second cylinder, so that the second cylinder abuts against the turntable to lock the electric rotating rod.

[0012] Furthermore, it also includes a sound wave transmission mechanism, which includes a second rotating frame rotated on the first rotating frame, a ball seat is hinged on the second rotating frame, a sound guide rod is slidably connected to the middle of the ball seat, and a sealing ball is connected to the end of the sound guide rod. After the second rotating frame is swung until the first rotating frame is located in the same plane, the sound guide rod can slide axially relative to the ball seat to contact the sound wave collector.

[0013] Furthermore, one end of the sound-guiding rod away from the ball seat is hinged to the sound source emitting device, an arc-shaped plate is connected to the second rotating frame, the sealing ball fits against the inner wall of the arc-shaped plate, the sound-guiding rod is composed of an inner rod and an outer tube, the inner rod slides in the outer tube, and the inner rod and the outer tube are connected by a return spring, the sealing ball is connected to the inner rod, when the second rotating frame swings, the sealing ball slides on the arc-shaped plate, when the second rotating frame swings to the level of the first rotating frame, the sealing ball detaches from the arc-shaped plate, so that the return spring pushes the inner rod of the sound-guiding rod to contact the sound wave collector.

[0014] Furthermore, the sound wave collector is composed of a conical shell and a collection unit, the collection unit is located at the innermost part of the conical shell, and a vacuum tube connected to the sealing ball is opened on the inner rod. After the sealing ball enters the conical shell and fits with the inner wall of the conical shell, the vacuum tube vacuums the conical shell.

[0015] Furthermore, it also includes an unlocking mechanism, which includes a slide bar sliding on the first rotating frame, a groove is opened on the lower surface of the slide bar, and a cam is connected to the second rotating frame. When the second rotating frame swings, the cam pushes the slide bar to slide, so that the groove moves to the upper part of the first cylinder so that the first cylinder can be extended.

[0016] The beneficial effects of the present invention are analyzed as follows: A sound collection device for security of main equipment in a substation comprises a sound source positioning mechanism, the sound source positioning mechanism comprises a box body, a port is opened in the box body and a vibration membrane is connected inside the port, a plurality of vibration sensors in contact with the vibration membrane are connected inside the box body, when sound waves are transmitted to the vibration membrane, the vibration membrane vibrates, after the plurality of vibration sensors successively sense the vibration of the vibration membrane, the port of the box body swings toward the vibration sensor that senses the vibration first, so that the port of the box body faces the sound source; a sound wave collection mechanism is arranged on the box body, and when the port of the box body faces the sound source, the sound wave collection mechanism is started.

[0017] When the main equipment of the substation makes a sound, the sound wave first propagates through the air to the port of the box and causes the vibration of the vibrating membrane. The vibration of the vibrating membrane is then sensed by multiple vibration sensors in contact with it. Since there is a time difference, i.e., wavefront difference, when the sound wave reaches each position of the box port, the vibration sensor closer to the sound source will sense the vibration first. Once a vibration sensor senses the vibration first, the mechanical structure inside the box, such as through a connecting rod, gear or servo motor, will drive the box port to swing toward the sensor until the port is completely facing the sound source. This mechanism ensures the accuracy and speed of sound source positioning. A sound wave collection mechanism is provided on the box, which can be composed of a high-sensitivity microphone, a signal amplifier and a data acquisition module. When the box port is facing the sound source, the sound wave collection mechanism starts to collect and analyze the sound wave signal from the sound source. After processing, the collected sound wave signal can be used to analyze the operating status of the main equipment of the substation, such as judging whether the equipment is operating normally, whether there is abnormal vibration or noise, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the sound source localization mechanism of the present invention; Figure 3 It is a structural schematic diagram of the steering mechanism of the present invention; Figure 4 It is a structural schematic diagram of the pushing mechanism of the present invention; Figure 5 It is a structural schematic diagram of the sound wave collection mechanism of the present invention; Figure 6 It is a structural schematic diagram of the sound wave transmission mechanism of the present invention; Figure 7 It is a structural schematic diagram of the vacuum tube of the present invention; Figure 8 It is a structural schematic diagram of the unlocking mechanism of the present invention.

[0020] icon: 100, sound source positioning mechanism; 110, box; 120, support frame; 130, vibration sensor; 140, vibration membrane; 200, sound wave collection mechanism; 210, first rotating frame; 220, sound wave collector; 230, positioning block; 300, sound wave transmission mechanism; 310, second rotating frame; 320, arc-shaped telescopic rod; 330, sound guide rod; 340, ball seat; 350, arc-shaped plate; 360, sealing ball; 370, vacuum tube; 380, adding tube; 400 , pushing mechanism; 410, insert rod; 420, limit plate; 430, spring; 440, magnetic block; 450, electromagnet; 460, arc-shaped piston cylinder; 470, arc-shaped piston rod; 500, locking mechanism; 510, first cylinder; 520, second cylinder; 600, steering mechanism; 610, base; 620, turntable; 630, electric telescopic rod; 640, electric rotating rod; 700, unlocking mechanism; 710, cam; 720, slide bar; 730, groove. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0024] like Figure 1-Figure 8As shown, a sound collection device for security of main equipment in a substation includes a sound source positioning mechanism 100, which includes a box 110. The box 110 is provided with a port and a vibrating membrane 140 is connected inside the port. A plurality of vibration sensors 130 in contact with the vibrating membrane 140 are connected inside the box 110. When sound waves are transmitted to the vibrating membrane 140, the vibrating membrane 140 vibrates. After the plurality of vibration sensors 130 successively sense the vibration of the vibrating membrane 140, the port of the box 110 swings toward the vibration sensor 130 that senses the vibration first, so that the port of the box 110 faces the sound source. A sound wave collection mechanism 200 is provided on the box 110. When the port of the box 110 faces the sound source, the sound wave collection mechanism 200 is started.

[0025] The working mechanism of the sound collection device provided in this embodiment is as follows: When the main equipment of the substation makes a sound, the sound wave first propagates through the air to the port of the box 110 and causes the vibration of the vibrating membrane 140. The vibration of the vibrating membrane 140 is then sensed by multiple vibration sensors 130 in contact with it. Since there is a time difference, i.e., a wavefront difference, between the sound wave and each position of the port of the box 110, the vibration sensor 130 closer to the sound source will sense the vibration first. Once a vibration sensor 130 senses the vibration first, the mechanical structure inside the box 110, such as through a connecting rod, gear or servo motor, will drive the port of the box 110 to move. The sensor swings in the direction until the port is completely facing the sound source. This mechanism ensures the accuracy and rapidity of locating the sound source. The box 110 is provided with a sound wave collection mechanism 200, which is composed of a high-sensitivity microphone, a signal amplifier and a data acquisition module. When the port of the box 110 is facing the sound source, the sound wave collection mechanism 200 is started to collect and analyze the sound wave signal from the sound source. After being processed, the collected sound wave signal can be used to analyze the operating status of the main equipment of the substation, such as judging whether the equipment is operating normally, whether there is abnormal vibration or noise, etc. The vibration sensor 130 is connected to the box body 110 through the support frame 120 .

[0026] Regarding the structure of the steering mechanism 600, specifically: The steering mechanism 600 includes a base 610 , on which a turntable 620 is rotatably connected, and an electric rotating rod 640 is connected to the turntable 620 . The top of the electric rotating rod 640 is hinged to the box 110 . An electric telescopic rod 630 is hinged to the turntable 620 , and the end of the electric telescopic rod 630 is hinged to the box 110 .

[0027] The control system acquires and processes the signal of the vibration sensor 130, and feeds the processed signal back to the steering mechanism 600 so that the steering mechanism 600 operates to drive the port of the box 110 toward the sound source. When the overall orientation of the box 110 needs to be changed, the electric rotating rod 640 maintains a fixed length, and the turntable 620 and the electric rotating rod 640 rotate under the drive of the motor, thereby driving the box 110 to rotate around the central axis of the base 610. This rotation allows the box 110 to freely adjust its direction 360 degrees in the horizontal plane. The extension and retraction of the electric telescopic rod 630 can adjust the pitch angle of the port of the box 110. Through the precise control of the electric telescopic rod 630, the fine adjustment of the position of the box 110 can be achieved.

[0028] Among the optional methods of this embodiment, the more preferred ones are: The sound wave collection mechanism 200 includes a first rotating frame 210, a sound wave collector 220 is connected to the middle of the first rotating frame 210, a positioning block 230 is connected to the side wall of the box 110, and the positioning block 230 can abut against the first rotating frame 210. After the port of the box 110 faces the sound source, the first rotating frame 210 swings and contacts the positioning block 230 so that the sound wave collector 220 is located in the middle of the port of the box 110.

[0029] Before the box 110 starts to rotate and position to align with the sound source, the first rotating frame 210 is located at the upper position of the box 110, and the sound wave collector 220 is located at this position. At this time, there is a distance between the positioning block 230 and the first rotating frame 210. Through the operation of the steering mechanism 600, the port of the box 110 is accurately adjusted to a position facing the sound source. In this process, the coordinated action of the electric rotating rod 640 and the electric telescopic rod 630 ensures that the box 110 can be stably and accurately positioned. Once the port of the box 110 faces the sound source, the first rotating frame 210 starts to swing. During the swinging process, the first rotating frame 210 gradually approaches the positioning block 230. When the first rotating frame 210 swings to contact with the positioning block 230, its swinging stops. At this time, since the position of the positioning block 230 is fixed and corresponds to the center of the port of the box body 110, the sound wave collector 220 is also located at the center of the port of the box body 110, ensuring that the sound wave collector 220 can receive the sound wave signal from the sound source to the maximum extent. After the sound wave collector 220 is in the correct position, it starts to work and collects the sound wave signal from the sound source. After these signals are processed, they can be used to analyze the operating status or potential faults of the main equipment of the substation.

[0030] Regarding the structure of the pushing mechanism 400, specifically: The pushing mechanism 400 is arranged on the box body 110, and is used to control the swing of the first rotating frame 210. The pushing mechanism 400 includes an arc-shaped piston cylinder 460, and an arc-shaped piston rod 470 is slidably connected inside the arc-shaped piston cylinder 460. The arc-shaped piston cylinder 460 is connected to the box body 110, and the arc-shaped piston rod 470 is connected to the first rotating frame 210. When the arc-shaped piston rod 470 slides, it can push the first rotating frame 210 to swing.

[0031] The center of the trajectory of the arc-shaped piston cylinder 460 coincides with the rotation point of the first rotating frame 210 , so that when the arc-shaped piston rod 470 slides toward the outside of the arc-shaped piston cylinder 460 , it can push the first rotating frame 210 to swing.

[0032] Among the optional methods of this embodiment, the more preferred ones are: The pushing mechanism 400 also includes an insertion rod 410, which is inserted into the arc-shaped piston cylinder 460; a limit plate 420 is connected to the insertion rod 410, and a spring 430 is connected between the limit plate 420 and the arc-shaped piston cylinder 460; the outer wall of the box body 110 is connected to an electromagnet 450 and an electric rotating rod 640 electrically connected in series; when the port of the box body 110 is not facing the sound source, the electric rotating rod 640 is energized so that the electromagnet 450 attracts the insertion rod 410 so that the insertion rod 410 is inserted into the arc-shaped piston cylinder 460; and, when the port of the box body 110 is facing the sound source, the electric rotating rod 640 is powered off to demagnetize the electromagnet 450, so that the spring 430 pushes the insertion rod 410 to pull out the arc-shaped piston cylinder 460, so that external air can enter the arc-shaped piston cylinder 460.

[0033] When the port of the box 110 is not facing the sound source, the electric rotating rod 640 remains powered on. Since the electric rotating rod 640 is electrically connected in series with the electromagnet 450, the electromagnet 450 is activated and generates magnetic force. At this time, the magnetic block 440 at the bottom of the plug 410 is attracted by the magnetic force of the electromagnet 450 and is firmly inserted into the arc piston cylinder 460, so that no air can enter or exit the arc piston cylinder 460, thereby preventing the arc piston rod 470 from sliding freely in the arc piston cylinder 460, thereby maintaining the current position of the first rotating frame 210 and the sound wave collector 220. When the port of the box 110 is turned by the steering mechanism When the structure 600 is adjusted to face the sound source, the electric rotating rod 640 receives a power-off signal and stops working, followed by the demagnetization of the electromagnet 450, and the magnetic force disappears. At this time, the previously compressed spring 430 begins to release its stored energy, pushing the limit plate 420 and the plug rod 410 connected thereto to move away from the electromagnet 450, and the plug rod 410 is gradually pulled out of the arc-shaped piston cylinder 460, so that air can enter the arc-shaped piston cylinder 460, allowing the arc-shaped piston rod 470 to slide relative to the arc-shaped piston cylinder 460. At this time, the first rotating frame 210 swings under the action of gravity to the position where the positioning block 230 contacts.

[0034] Among the optional methods of this embodiment, the more preferred ones are: A locking mechanism 500 is provided on the box body 110 for locking the relative position of the electric rotating rod 640 and the base 610. The locking mechanism 500 includes a first cylinder 510 and a second cylinder 520. The first cylinder 510 is connected to the box body 110, and the second cylinder 520 is connected to the base 610. After the first rotating frame 210 swings, it squeezes the first cylinder 510 so that the air in the first cylinder 510 is transmitted to the second cylinder 520, so that the second cylinder 520 abuts against the turntable 620 to lock the electric rotating rod 640.

[0035] When the first rotating frame 210 completes its swinging motion, that is, the sound wave collector 220 has been accurately aligned with the middle of the port of the box body 110, the first rotating frame 210 will squeeze the cylinder rod of the first cylinder 510 installed on the box body 110, so that the air in the first cylinder 510 is transmitted to the second cylinder 520 connected thereto through the pipeline. At this time, the cylinder rod of the second cylinder 520 is extended, so that the cylinder rod of the second cylinder 520 abuts against the turntable 620, making it difficult for the turntable 620 to rotate relative to the base 610, so that the orientation of the sound wave collector 220 is locked.

[0036] Regarding the structure of the sound wave transmission mechanism 300, specifically: The sound wave transmission mechanism 300 includes a second rotating frame 310 that rotates on the first rotating frame 210. A ball seat 340 is hinged on the second rotating frame 310. A sound guide rod 330 is slidably connected to the middle of the ball seat 340. A sealing ball 360 is connected to the end of the sound guide rod 330. After the second rotating frame 310 swings until it is in the same plane as the first rotating frame 210, the sound guide rod 330 can slide axially relative to the ball seat 340 to contact the sound wave collector 220.

[0037] If the external noise is too loud, or the sound waves collected are small or complex and difficult to analyze, the sound wave transmission mechanism 300 is activated to collect the sound waves. The second rotating frame 310 is rotatably mounted on the first rotating frame 210 and can be swung as needed. The ball seat 340 is hinged on the second rotating frame 310, providing a platform that can accommodate and guide the movement of the sound guide rod 330. The middle part of the sound guide rod 330 is slidably connected in the ball seat 340 to ensure that the rotation of the second rotating frame 310 is not interfered with. The end of the sound guide rod 330 is connected with a sealing ball 360 for contacting with the sound wave collector 22 0 forms a sealed contact, the second rotating frame 310 is driven by the arc-shaped telescopic rod 320 to swing, and the arc-shaped telescopic rod 320 is electrically or hydraulically driven to extend and retract. When the second rotating frame 310 swings, the end of the sound guide rod 330 connected to the second rotating frame 310 through the ball seat 340 can move to the front of the sound wave collector 220, so that the sound guide rod 330 can then approach the sound wave collector 220 and contact the sound wave collector 220, so that the sound waves are transmitted to the sound wave collector 220 through the solid state of the sound guide rod 330, thereby ensuring that the sound waves collected by the sound wave collector 220 are accurate and clear.

[0038] Among the optional methods of this embodiment, the more preferred ones are: One end of the sound-guiding rod 330 away from the ball seat 340 is hinged to the sound source emitting device, and an arc plate 350 is connected to the second rotating frame 310, and a sealing ball 360 is attached to the inner wall of the arc plate 350. The sound-guiding rod 330 is composed of an inner rod and an outer tube, and the inner rod slides on the outer tube, and the inner rod and the outer tube are connected by a return spring, and the sealing ball 360 is connected to the inner rod. When the second rotating frame 310 swings, the sealing ball 360 slides on the arc plate 350. When the second rotating frame 310 swings to the level of the first rotating frame 210, the sealing ball 360 is separated from the arc plate 350, so that the return spring pushes the inner rod of the sound-guiding rod 330 to contact the sound wave collector 220.

[0039] The action of the return spring makes the sound-guiding rod 330 always have a tendency to extend, so that when the second rotating frame 310 swings, the sealing ball 360 can press against the arc plate 350 and slide along the inner wall of the arc plate 350. When the second rotating frame 310 swings to a horizontal state with the first rotating frame 210, the arc plate 350 no longer blocks the sealing ball 360. At this time, the return spring pushes the inner rod of the sound-guiding rod 330, so that the sound-guiding rod 330 contacts the sound wave collector 220. Liquid medium can also be injected between the inner rod and the outer tube to promote the mutual sliding of the inner rod and the outer tube. An addition tube 380 is connected to the outer tube, and the medium is injected into the internal space of the outer tube through the addition tube 380, so that the inner rod is pushed, thereby avoiding the transmission of sound causing the return spring to vibrate and cause chaotic sound waves.

[0040] Among the optional methods of this embodiment, the more preferred ones are: The sound wave collector 220 is composed of a conical shell and a collection unit. The collection unit is located at the innermost part of the conical shell. A vacuum tube 370 connected to the sealing ball 360 is opened on the inner rod. After the sealing ball 360 enters the conical shell and fits with the inner wall of the conical shell, the vacuum tube 370 evacuates the conical shell.

[0041] After the sound guide rod 330 approaches the sound wave collector 220, the sealing ball 360 can move into the conical shell of the sound wave collector 220, so that the sealing ball 360 can contact the inner wall of the conical shell, and the sealing ball 360 can also contact the collection unit. At this time, the conical shell is evacuated through the vacuum tube 370, so that negative pressure is generated in the conical shell to adsorb the sealing ball 360, ensuring a stable contact between the two. At the same time, the vacuum environment also prevents noise from being transmitted to the collection unit through the air, causing the collected sound waves to be chaotic.

[0042] Regarding the structure of the unlocking mechanism 700, specifically: The unlocking mechanism 700 includes a slide bar 720 that slides on the first rotating frame 210, and a groove 730 is formed on the lower surface of the slide bar 720. A cam 710 is connected to the second rotating frame 310. When the second rotating frame 310 swings, the cam 710 pushes the slide bar 720 to slide, so that the groove 730 moves to the upper part of the first cylinder 510 so that the first cylinder 510 can be extended.

[0043] The swing of the second rotating frame 310 makes the sound wave collector 220 no longer rely on the transmission of air to collect sound waves, so that the direction of the box 110 does not have to be facing the sound source. After the second rotating frame 310 rotates, the cam 710 connected to the second rotating frame 310 can push the slide bar 720, so that the groove 730 on the slide bar 720 can move to the upper part of the cylinder rod of the first cylinder 510, so that the cylinder rod of the first cylinder 510 is no longer compressed, so that the second cylinder 520 can be shortened to allow the electric rotating rod 640 to rotate, so that when the second rotating frame 310 swings, the box 110 can rotate to adapt to the movement of the sound guide rod 330.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound collection device for security of main equipment in a substation, characterized by: The sound source positioning mechanism (100) comprises a box (110), the box (110) being provided with a port and a vibration membrane (140) being connected inside the port, the box (110) being connected inside with a plurality of vibration sensors (130) in contact with the vibration membrane (140), when sound waves are transmitted to the vibration membrane (140), the vibration membrane (140) vibrates, and after the plurality of vibration sensors (130) successively sense the vibration of the vibration membrane (140), the port of the box (110) swings in the direction of the vibration sensor (130) that senses the vibration first, so that the port of the box (110) faces the sound source; The box (110) is provided with a sound wave collection mechanism (200), and when a port of the box (110) faces a sound source, the sound wave collection mechanism (200) is activated.

2. The sound collection device for security of main equipment of a substation according to claim 1 is characterized in that: The invention also comprises a steering mechanism (600), wherein the steering mechanism (600) comprises a base (610), a turntable (620) being rotatably connected to the base (610), an electric turning rod (640) being connected to the turntable (620), a top of the electric turning rod (640) being hinged to the box (110), an electric telescopic rod (630) being hinged to the turntable (620), and an end of the electric telescopic rod (630) being hinged to the box (110).

3. The sound collection device for security of main equipment of a substation according to claim 2, characterized in that: The sound wave collection mechanism (200) comprises a first rotating frame (210), a sound wave collector (220) being connected to the middle of the first rotating frame (210), a positioning block (230) being connected to the side wall of the box (110), the positioning block (230) being capable of abutting against the first rotating frame (210), and after the port of the box (110) faces the sound source, the first rotating frame (210) swings and contacts the positioning block (230) so that the sound wave collector (220) is located in the middle of the port of the box (110).

4. The sound collection device for security of main equipment of a substation according to claim 3 is characterized in that: The box body (110) is also provided with a pushing mechanism (400) for controlling the swing of the first rotating frame (210). The pushing mechanism (400) comprises an arc-shaped piston cylinder (460), and an arc-shaped piston rod (470) is slidably connected inside the arc-shaped piston cylinder (460). The arc-shaped piston cylinder (460) is connected to the box body (110), and the arc-shaped piston rod (470) is connected to the first rotating frame (210). When the arc-shaped piston rod (470) slides, it pushes the first rotating frame (210) to swing.

5. The sound collection device for security of main equipment of a substation according to claim 4 is characterized in that: The pushing mechanism (400) further comprises an insert rod (410), wherein the insert rod (410) is inserted into the arc-shaped piston cylinder (460); The insertion rod (410) is connected to a limit plate (420), a spring (430) is connected between the limit plate (420) and the arc-shaped piston cylinder (460), and the outer wall of the box (110) is connected to an electromagnet (450) electrically connected in series with the electric rotating rod (640). When the port of the box (110) is not facing the sound source, the electric rotating rod (640) is energized so that the electromagnet (450) attracts the insertion rod (410) so that the insertion rod (410) is inserted into the arc-shaped piston cylinder (460); and when the port of the box (110) is facing the sound source, the electric rotating rod (640) is de-energized so that the electromagnet (450) is demagnetized, so that the spring (430) pushes the insertion rod (410) to pull out of the arc-shaped piston cylinder (460), so that external air enters the arc-shaped piston cylinder (460).

6. The sound collection device for security of main equipment of a substation according to claim 5, characterized in that: The box body (110) is provided with a locking mechanism (500) for locking the relative position of the electric rotating rod (640) and the base (610), the locking mechanism (500) comprising a first cylinder (510) and a second cylinder (520), the first cylinder (510) being connected to the box body (110), the second cylinder (520) being connected to the base (610), the first rotating frame (210) being swung to squeeze the first cylinder (510) so that the air in the first cylinder (510) is transmitted to the second cylinder (520), so that the second cylinder (520) abuts against the rotating disk (620) so that the electric rotating rod (640) is locked.

7. The sound collection device for security of main equipment of a substation according to claim 6, characterized in that: The device also comprises a sound wave transmission mechanism (300), wherein the sound wave transmission mechanism (300) comprises a second rotating frame (310) rotating on the first rotating frame (210), a ball seat (340) being hinged on the second rotating frame (310), a sound guide rod (330) being slidably connected to the middle of the ball seat (340), and a sealing ball (360) being connected to the end of the sound guide rod (330), and after the second rotating frame (310) is swung until the first rotating frame (210) is located in the same plane, the sound guide rod (330) slides axially relative to the ball seat (340) to contact the sound wave collector (220).

8. The sound collection device for security of main equipment in a substation according to claim 7, characterized in that: One end of the sound guide rod (330) away from the ball seat (340) is hinged to the sound source emitting device, and the second rotating frame (310) is connected to an arc plate (350), and the sealing ball (360) is fitted on the inner wall of the arc plate (350). The sound guide rod (330) is composed of an inner rod and an outer tube, and the inner rod slides on the outer tube, and the inner rod and the outer tube are connected by a return spring, and the sealing ball (360) is connected to the inner rod. When the second rotating frame (310) swings, the sealing ball (360) slides on the arc plate (350), and when the second rotating frame (310) swings to the level of the first rotating frame (210), the sealing ball (360) is separated from the arc plate (350), so that the return spring pushes the inner rod of the sound guide rod (330) to contact the sound wave collector (220).

9. The sound collection device for security of main equipment of a substation according to claim 8, characterized in that: The sound wave collector (220) is composed of a conical shell and a collection unit, wherein the collection unit is located at the innermost part of the conical shell, and the inner rod is provided with a vacuum tube (370) connected to the sealing ball (360). After the sealing ball (360) enters the conical shell and fits with the inner wall of the conical shell, the vacuum tube (370) evacuates the conical shell.

10. The sound collection device for security of main equipment of a substation according to claim 9, characterized in that: The invention also includes an unlocking mechanism (700), wherein the unlocking mechanism (700) includes a slide bar (720) sliding on the first rotating frame (210), a groove (730) being provided on the lower surface of the slide bar (720), and a cam (710) being connected to the second rotating frame (310), and when the second rotating frame (310) swings, the cam (710) pushes the slide bar (720) to slide, so that the groove (730) moves to the upper part of the first cylinder (510) to extend the first cylinder (510).

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