Substation sound wave detection equipment

Abstract

The invention relates to the technical field of sound wave measurement, in particular to substation sound wave detection equipment, which is used for solving the problem of inaccurate sound wave measurement caused by other noises in a substation environment, and comprises a sound wave receiving mechanism, a lifting mechanism and a shielding mechanism, the shielding mechanism comprises a semicircular shell, and the sound wave receiving mechanism is inserted into the semicircular shell; the lifting mechanism comprises an electric telescopic rod, a rack and gears, the electric telescopic rod acts on the semicircular shell to drive the semicircular shell to ascend and descend, the gears are arranged on the two sides of the semicircular shell, and the rack is vertically arranged; the sound wave receiving mechanism comprises a microphone array arranged on the upper portion of the semicircular shell, and when the semicircular shell is driven to ascend, the gear rolls on the rack so that the semicircular shell can rotate in the first direction to wrap the microphone array. According to the equipment, after the semicircular shell is rotated, the opening can be aligned with equipment needing to be detected, so that other sound waves are blocked by the semicircular shell, and the sound waves of the equipment needing to be detected enter the semicircular shell through the opening of the semicircular shell and are captured by the microphone.

Description

Technical Field

[0001] The invention relates to the technical field of sound wave measurement, and in particular to a sound wave detection device for a transformer substation. Background Art

[0002] In intelligent power distribution systems, real-time monitoring of the operating status of key equipment is an important part of ensuring stable system operation and efficient management. Traditional monitoring methods mainly rely on direct measurement of electrical parameters and physical quantities, such as current, voltage, temperature, etc. However, these methods may not fully reflect the true operating status of the equipment in some cases, especially when there are potential defects or faults inside the equipment.

[0003] In order to overcome this limitation, in recent years, acoustic wave detection technology has gradually been applied in the field of substation equipment monitoring. Acoustic wave detection technology can realize non-contact monitoring of the internal status of the equipment by capturing the characteristics of the sound waves generated when the equipment is running. This technology not only has the characteristics of high sensitivity and fast response speed, but also can monitor the equipment when it is in normal operation, avoiding the inconvenience and loss caused by shutdown inspection.

[0004] However, in the actual application of acoustic wave measurement equipment in substations, a key technical problem is how to ensure that the acoustic wave receiving mechanism can accurately and stably locate the substation equipment to be measured. The internal environment of the substation is complex, with many devices, and often there are multiple interference factors such as electromagnetic interference and mechanical vibration, all of which may have an adverse effect on acoustic wave measurement. Summary of the invention

[0005] The invention provides a substation sound wave detection device to solve the problem of inaccurate sound wave measurement caused by other noises in the substation environment.

[0006] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0007] A substation acoustic wave detection device comprises an acoustic wave receiving mechanism, a lifting mechanism and a shielding mechanism, wherein the shielding mechanism comprises a semicircular shell, and the acoustic wave receiving mechanism is inserted into the interior of the semicircular shell;

[0008] The lifting mechanism includes an electric telescopic rod, a rack and a gear, the electric telescopic rod acts on the semicircular shell to drive the semicircular shell to rise and fall, the gear is arranged on both sides of the semicircular shell, and the rack is arranged vertically;

[0009] The sound wave receiving mechanism includes a microphone array arranged on the upper part of the semicircular shell. When the semicircular shell is driven to rise, the gear rolls on the rack to make the semicircular shell rotate along a first direction, and the first direction is a circumferential direction around the axis of the gear.

[0010] Furthermore, the semicircular shell is provided with a through groove, and when the semicircular shell rotates along the first direction, the through groove is used as an escape space for the sound wave receiving mechanism.

[0011] Furthermore, the sound wave receiving mechanism includes a sleeve and a rotating shaft, the sleeve is slidably sleeved on the rotating shaft, the microphone array is connected to the top of the rotating shaft, and the output end of the electric telescopic rod is connected to the protrusion on the side wall of the sleeve.

[0012] Furthermore, the rotating shaft is slidably connected to an arc-shaped baffle, the arc-shaped baffle is fixedly connected to the rotating shaft, the arc-shaped baffle can move up and down along the rotating shaft in the axial direction, and the rotating shaft can drive the arc-shaped baffle to rotate around the axis;

[0013] The arc-shaped baffle blocks the through slot when the semicircular shell rotates along the first direction, thereby avoiding the collection of sound waves at non-target points.

[0014] Furthermore, the sound wave receiving mechanism also includes a motor, a driving shaft is connected between the rotating shaft and the motor, the rotating shaft is connected to the output end of the motor, and the motor drives the rotating shaft to rotate when it is started, so that the semicircular shell rotates along a second direction, and the second direction is circumferential around the axis of the rotating shaft.

[0015] Furthermore, the sound wave receiving mechanism also includes a base, and the motor is arranged in the base.

[0016] Furthermore, a vacuum chamber is provided in the shell of the semicircular shell, and an exhaust pipe is connected to the vacuum chamber and the space between the sleeve and the driving shaft. When the sleeve slides upward relative to the driving shaft, the air in the vacuum chamber is discharged through the exhaust pipe.

[0017] Furthermore, the sound wave receiving mechanism also includes an outer cylinder connected to the base, a swivel is connected to the top of the outer cylinder, and the electric telescopic rod is connected to the swivel.

[0018] Furthermore, it also includes a locking mechanism, which includes a first sliding rod telescopically connected to the outer cylinder, and the end of the first sliding rod is connected to a locking plate. After the sleeve moves up, the locking plate abuts against the sleeve, so that the sleeve is locked to the base.

[0019] Furthermore, the locking mechanism further comprises a second sliding rod;

[0020] A pipeline is arranged in the outer cylinder, and when the second slide bar slides, it is transmitted to the first slide bar through the pipeline, so that the first slide bar and the second slide bar slide synchronously and in opposite directions;

[0021] The bottom of the sleeve is provided with an inclined surface, and the end of the second sliding rod is in contact with the outer wall of the sleeve. When the sleeve slides, the inclined surface drives the second sliding rod to slide on the outer cylinder.

[0022] The beneficial effects of the present invention are analyzed as follows:

[0023] A substation sound wave detection device comprises a sound wave receiving mechanism, a lifting mechanism and a shielding mechanism, wherein the shielding mechanism comprises a semicircular shell, and the sound wave receiving mechanism is inserted into the interior of the semicircular shell; the lifting mechanism comprises an electric telescopic rod, a rack and a gear, wherein the electric telescopic rod acts on the semicircular shell to drive the semicircular shell to rise and fall, the gear is arranged on both sides of the semicircular shell, and the rack is arranged vertically; the sound wave receiving mechanism comprises a microphone array arranged on the upper part of the semicircular shell, and when the semicircular shell is driven to rise, the gear rolls on the rack to make the semicircular shell rotate along a first direction a, and the semicircular shell covers the microphone array after moving.

[0024] The microphone array is arranged in a ring shape. When the equipment is in use, the microphone array captures sound waves around it, and then the sound waves are transmitted to the terminal. The staff observes the waveforms of the sound waves captured by each microphone and determines the microphone that receives the equipment to be detected. The staff then controls the semicircular shell to rotate so that the through slot is aligned with the equipment to be detected. The semicircular shell is then controlled to move upward. During the upward movement, the semicircular shell rotates and covers the microphone array. The opening of the rotated semicircular shell can be aligned with the equipment to be detected, so that the remaining sound waves are blocked by the semicircular shell, while the sound waves of the equipment to be detected enter the semicircular shell through the opening of the semicircular shell and are captured by the microphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a cross-sectional view of the base of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the sound wave receiving mechanism of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the rack of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the shielding mechanism of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the air extraction pipe of the present invention;

[0033] Figure 8 For the present invention Figure 2 Schematic diagram of the structure of part A.

[0034] icon:

[0035] 100, sound wave receiving mechanism; 110, base; 111, outer cylinder; 120, motor; 130, drive shaft; 140, sleeve; 141, bump; 150, rotating shaft; 160, microphone array; 200, lifting mechanism; 210, swivel; 220, electric telescopic rod; 230, rack; 240, gear; 300, shielding mechanism; 310, semicircular shell; 320, through groove; 330, vacuum chamber; 340, arc baffle; 350, exhaust pipe; 400, locking mechanism; 410, inclined plane; 420, second slide bar; 430, first spring; 440, pipeline; 450, first slide bar; 460, locking plate; 470, piston plate; 480, second spring. DETAILED DESCRIPTION

[0036] 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 the embodiments. 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.

[0037] 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.

[0038] 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.

[0039] Examples, such as Figure 1-Figure 8 As shown, a substation sound wave detection device includes a sound wave receiving mechanism 100, and the sound wave receiving mechanism 100 includes a base 110, an outer cylinder 111 is connected to the base 110, a rotating shaft 150 is rotatably connected inside the outer cylinder 111, and a ring-shaped microphone array 160 is connected to the rotating shaft 150; the microphone array 160 receives substation sound waves, and a semicircular shell 310 is arranged on the upper part of the outer cylinder 111. When the semicircular shell 310 moves upward, it rotates along the first direction a and covers the microphone array 160.

[0040] The working mechanism of the acoustic wave detection device provided in this embodiment is as follows:

[0041] The rotating shaft 150 rotates on the base 110. In the initial stage of acquiring sound waves, the rotating shaft 150 does not rotate relative to the base 110, thereby ensuring that the initial position of the microphone array 160 is stable. The microphone array 160 is powered on so that the microphone arrays 160 are started up separately and sequentially acquire sound waves emitted by nearby devices. Each microphone constituting the microphone array 160 acquires sound waves in the direction in which it is facing and transmits them to the terminal. The staff analyzes the waveform and selects a microphone that acquires the required waveform according to the waveform characteristics of the device to be measured. This microphone is a specific microphone, and the position of the specific microphone is a reference point. The relative position between each microphone and the reference point is determined. When the specific microphone After confirmation, the control system controls the rotating shaft 150 to rotate so that the through slot 320 moves to the reference point, the microphone corresponding to the through slot 320 is turned on, and the other microphones constituting the microphone array 160 are turned off, and then the semicircular shell 310 rotates in the first direction a and covers the microphone array 160. When the semicircular shell 310 rotates in the first direction a, the vertical opening direction thereof is changed, and the microphone corresponding to the reference point is at the opening of the semicircular shell 310, so that only the microphone corresponding to the reference point receives the sound wave, thereby improving the stability of subsequent measurements and ensuring that the subsequent received sound waves are less disturbed. The specific microphone is the microphone corresponding to the reference point, and does not refer to one of the microphone array 160 in a fixed manner.

[0042] The acoustic wave detection equipment transmits data and receives instructions with the control center of the intelligent distribution system through a network interface or communication protocol. In the intelligent distribution system, the acoustic wave detection equipment can be used to monitor the operating status of key equipment such as transformers, switch cabinets, capacitors, etc. When these devices have abnormalities, such as discharge, vibration or mechanical failure, they will generate specific acoustic wave characteristics. The acoustic wave detection equipment can capture these characteristics and transmit them to the control center in real time so that the staff can take timely measures to deal with them.

[0043] Regarding the structure of the shielding mechanism 300, specifically:

[0044] The shielding mechanism 300 further includes an arc-shaped baffle 340 , which is slidably connected to the rotating shaft 150 . When the semicircular shell 310 rotates, the arc-shaped baffle 340 can block the through slot 320 .

[0045] The arc baffle 340 is slidably mounted on the rotating shaft 150, and the arc baffle 340 can move axially along the rotating shaft 150 without rotating. At the same time, the rotating shaft 150 can drive the arc baffle 340 to rotate synchronously. A slider is provided on the outer arc surface of the arc baffle 340, and the slider slides on the inner wall of the semicircular shell 310, so that the relative sliding stroke of the arc baffle 340 and the semicircular shell 310 is limited, and at the same time, the position of the arc baffle 340 and the through groove 320 is relatively fixed. When the semicircular shell 310 is in a rotated state, the arc baffle 340 can move to the position of the through groove 320 and block it, so that the sound waves under the semicircular shell 310 will not be transmitted to the specific microphone.

[0046] The semicircular shell 310 blocks and shields the sound waves in other directions to ensure that it receives sound waves in a directional manner. The opening is turned toward the substation equipment to be measured, so that the operator can quickly align the measurement target without moving the entire shielding mechanism 300 or the substation equipment. The rotating shaft 150 is a component connecting the semicircular shell 310 and the fixed structure, allowing the semicircular shell 310 to rotate so that the opening direction can be adjusted.

[0047] Among the optional methods of this embodiment, the more preferred ones are:

[0048] The sound wave receiving mechanism 100 also includes a motor 120, which is connected to the base 110. The output end of the motor 120 is connected to a drive shaft 130, and a sleeve 140 is slidably connected to the drive shaft 130. The rotating shaft 150 is connected to the top of the sleeve 140, and the semicircular shell 310 rotates on the top of the sleeve 140.

[0049] The interaction between the motor 120, the drive shaft 130, the sleeve 140, the rotating shaft 150 and the semicircular shell 310 constitutes a rotating structure for adjusting the direction and position of the semicircular shell 310. The drive shaft 130 and the sleeve 140 are connected by a key sliding connection. The control system controls the motor 120 to start, so that the drive shaft 130 drives the sleeve 140 to rotate, so that the semicircular shell 310 at the top of the sleeve 140 can be driven by the sleeve 140 to rotate in the second direction b, so that the horizontal direction of the opening of the semicircular shell 310 can be changed.

[0050] Among the optional methods of this embodiment, the more preferred ones are:

[0051] A vacuum chamber 330 is provided in the semicircular shell 310 , and an exhaust pipe 350 is connected to the vacuum chamber 330 and the space between the sleeve 140 and the drive shaft 130 . When the sleeve 140 slides upward relative to the drive shaft 130 , the air in the vacuum chamber 330 can be discharged through the exhaust pipe 350 .

[0052] The vacuum chamber 330 is opened inside the semicircular shell 310, and a low-pressure or even vacuum environment is created to reduce or eliminate the influence of air on the transmission of sound waves, thereby ensuring the anti-interference ability of a specific microphone and significantly improving the accuracy and sensitivity of the measurement. The exhaust pipe 350 is a component that connects the vacuum chamber 330 with the space between the sleeve 140 and the drive shaft 130. When necessary, the air in the vacuum chamber 330 is extracted to maintain the required vacuum degree. Specifically, when the sleeve 140 slides up relative to the drive shaft 130, the semicircular shell 310 moves up. At this time, negative pressure is generated between the sleeve 140 and the drive shaft 130. The negative pressure then extracts the air in the semicircular shell 310 through the exhaust pipe 350, reducing the air in the vacuum chamber 330, thereby improving the anti-interference ability of the specific microphone.

[0053] Regarding the structure of the lifting mechanism 200, specifically:

[0054] The lifting mechanism 200 includes an electric telescopic rod 220 , which is connected to the base 110 , and an output end of the electric telescopic rod 220 is connected to a protrusion 141 on a side wall of the sleeve 140 .

[0055] The lifting mechanism 200 is used to change the vertical distance between the semicircular shell 310 and the ground, and when the semicircular shell 310 is driven to move upward, the semicircular shell 310 simultaneously rotates and covers the microphone array 160, so that the semicircular shell 310 wraps the specific microphone, so that the sound wave acquisition direction of the specific microphone can be located.

[0056] Among the optional methods of this embodiment, the more preferred ones are:

[0057] The lifting mechanism 200 also includes a rack 230 connected to the base 110, and a gear 240 meshing with the rack 230 is connected to the outer wall of the semicircular shell 310. When the electric telescopic rod 220 is extended, the semicircular shell 310 can move upward, and the gear 240 rolls on the rack 230, so that the opening of the semicircular shell 310 can face the substation equipment to be measured.

[0058] When the electric telescopic rod 220 is extended, an upward thrust is applied to the sleeve 140, and the semicircular shell 310 is positioned by the arc baffle 340 to ensure that the semicircular shell 310 can rotate in a normal direction with its spherical center, so that the sleeve 140 moves up relative to the base 110. Since the sleeve 140 is connected to the rotating shaft 150 and the semicircular shell 310, the thrust is transmitted to the semicircular shell 310, causing it to start to move up. The rack 230 is fixedly connected to the base 110. As the semicircular shell 310 moves up, the gear 240 connected to its outer wall is engaged with the rack. The teeth on 230 begin to mesh, so that the arc baffle 340 slides relative to the semicircular shell 310, and the rolling of the gear 240 on the rack 230 ensures the smooth movement of the semicircular shell 310. Since the meshing of the gear 240 and the rack 230 is self-locking, when the electric telescopic rod 220 stops working, the semicircular shell 310 can remain in the current position without accidentally sliding down. After the electric telescopic rod 220 is extended to the longest state, the semicircular shell 310 rotates so that its opening faces the equipment to be measured, and then the electric telescopic rod 220 stops running.

[0059] Among the optional methods of this embodiment, the more preferred ones are:

[0060] A swivel ring 210 is connected to the top of the base 110 , and the electric telescopic rod 220 is connected to the swivel ring 210 .

[0061] The setting of the rotating ring 210 enables the electric telescopic rod 220 to rotate relative to the base 110, so that when the motor 120 operates to move the reference point to a specific microphone position, the rotation of the rotating shaft 150 will not be interfered.

[0062] Regarding the structure of the locking mechanism 400, specifically:

[0063] The locking mechanism 400 includes a first slide bar 450 that slides on the base 110 , and a locking plate 460 is connected to the end of the first slide bar 450 . After the sleeve 140 moves up to rotate the semicircular shell 310 , the locking plate 460 can abut against the sleeve 140 , so that the sleeve 140 is locked to the base 110 .

[0064] When the position and angle of the semicircular shell 310 need to be adjusted, the sleeve 140 is first moved up through the lifting mechanism 200, and the rotating shaft 150 and the semicircular shell 310 are driven to rotate. During this process, the locking mechanism 400 is in an unlocked state, that is, the locking plate 460 is not in contact with the sleeve 140. Once the semicircular shell 310 is adjusted to the desired position and angle, the first slide bar 450 slides along the base 110 until the locking plate 460 abuts against the sleeve 140. When the locking plate 460 is in close contact with the sleeve 140, the sleeve 140 is prevented from further moving or rotating, thereby locking the semicircular shell 310 in the desired position. In the locked state, even if it is subject to external interference or vibration, the semicircular shell 310 can maintain the stability of its position and angle, thereby ensuring the accuracy and reliability of sound wave reception.

[0065] Among the optional methods of this embodiment, the more preferred ones are:

[0066] The locking mechanism 400 also includes a second slide bar 420, a first slide hole that cooperates with the second slide bar 420 is opened in the base 110, a first spring 430 is placed in the hole, and the first spring 430 is connected between the second slide bar 420 and the base 110; the end of the first slide bar 450 is connected to the piston plate 470, and the base 110 is opened. A second slide hole that cooperates with the piston plate 470 is opened, and a second spring 480 is connected between the piston plate 470 and the base 110; the first slide hole and the space between the piston plate 470 and the locking plate 460 in the second slide hole are connected by a pipeline 440; the bottom of the sleeve 140 is provided with an inclined surface 410, and the end of the second slide bar 420 is in contact with the outer wall of the sleeve 140. After the sleeve 140 moves up to rotate the semicircular shell 310, the end of the second slide bar 420 can move to the inclined surface 410, so that the medium in the second slide hole moves to the first slide hole, so that the locking plate 460 abuts against the sleeve 140.

[0067] In the initial state, the outer wall of the sleeve 140 at the upper part of the inclined surface 410 abuts against the second sliding rod 420, causing the second sliding rod 420 to slide into the first sliding hole, thereby compressing the first spring 430. At this time, the medium in the first sliding hole is transmitted to the second sliding hole, so that the piston plate 470 is pushed, compressing the second spring 480 while the locking plate 460 does not contact the sleeve 140. At this time, the locking mechanism 400 is in an unlocked state. When the sleeve 140 moves up through the lifting mechanism 200 and drives the semicircular shell 310 to rotate to the desired position, the inclined surface 410 at its bottom will contact the end of the second sliding rod 420. As the sleeve 140 moves further up, the second sliding rod 420 slides along the inclined surface 410, causing the first spring 430 to be elastically released. , causing the medium in the pipeline 440 to start flowing, and this flow causes the medium in the second sliding hole to move into the first sliding hole, so that the compressed second spring 480 elastically recovers and pushes the piston plate 470, so that the locking plate 460 is close to the sleeve 140. When the electric telescopic rod 220 is extended to the longest, the locking plate 460 abuts against the sleeve 140 to achieve the locking function. In the locked state, even if there is external interference or vibration, due to the close contact between the locking plate 460 and the sleeve 140, the semicircular shell 310 will remain in its locked position. In order to unlock, the second sliding rod 420 can be reset by manual operation or electric control, thereby allowing the medium in the pipeline 440 to flow in the opposite direction and pushing the piston plate 470 and the locking plate 460 back to their initial positions.

[0068] 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 substation acoustic wave detection device, characterized in that: It comprises a sound wave receiving mechanism (100), a lifting mechanism (200) and a shielding mechanism (300); The shielding mechanism (300) comprises a semicircular shell (310), and the sound wave receiving mechanism (100) is inserted into the interior of the semicircular shell (310); The lifting mechanism (200) comprises an electric telescopic rod (220), a rack (230) and a gear (240), wherein the electric telescopic rod (220) acts on the semicircular shell (310) to drive the semicircular shell (310) to rise and fall, the gear (240) is arranged on both sides of the semicircular shell (310), and the rack (230) is arranged vertically; The sound wave receiving mechanism (100) comprises a microphone array (160) arranged on the upper part of the semicircular shell (310); when the semicircular shell (310) is driven to rise, the gear (240) rolls on the rack (230) so that the semicircular shell (310) rotates in a first direction, wherein the first direction is a circumferential direction around the axis of the gear (240).

2. The substation acoustic wave detection equipment according to claim 1, characterized in that: The semicircular shell (310) is provided with a through slot (320); when the semicircular shell (310) rotates along the first direction, the through slot (320) serves as an escape space for the sound wave receiving mechanism (100).

3. The substation acoustic wave detection equipment according to claim 2, characterized in that: The sound wave receiving mechanism (100) comprises a sleeve (140) and a rotating shaft (150), the sleeve (140) is slidably sleeved on the rotating shaft (150), the microphone array (160) is connected to the top of the rotating shaft (150), and the output end of the electric telescopic rod (220) is connected to a protrusion (141) on the side wall of the sleeve (140).

4. The substation acoustic wave detection equipment according to claim 3, characterized in that: The rotating shaft (150) is key-slidably connected with an arc-shaped baffle (340), the arc-shaped baffle (340) is fixedly connected to the rotating shaft (150), the arc-shaped baffle (340) can move up and down along the rotating shaft (150) in the axial direction, and the rotating shaft (150) can drive the arc-shaped baffle (340) to rotate around the axis; The arc-shaped baffle (340) blocks the through slot (320) when the semicircular shell (310) rotates in a first direction, thereby avoiding the collection of sound waves at non-target points.

5. The substation acoustic wave detection equipment according to claim 3, characterized in that: The sound wave receiving mechanism (100) further comprises a motor (120), a driving shaft (130) being connected between the rotating shaft (150) and the motor (120), the rotating shaft (150) being connected to an output end of the motor (120), and the motor (120) driving the rotating shaft (150) to rotate when the motor (120) is started, so that the semicircular shell (310) rotates in a second direction, the second direction being a circumferential direction around the axis of the rotating shaft (150).

6. The substation acoustic wave detection equipment according to claim 5, characterized in that: The sound wave receiving mechanism (100) further comprises a base (110), and the motor (120) is arranged in the base (110).

7. The substation acoustic wave detection equipment according to claim 6, characterized in that: A vacuum chamber (330) is provided in the shell of the semicircular shell (310), and an exhaust pipe (350) is connected between the vacuum chamber (330) and the space between the sleeve (140) and the drive shaft (130). When the sleeve (140) slides upward relative to the drive shaft (130), the air in the vacuum chamber (330) is discharged through the exhaust pipe (350).

8. The substation acoustic wave detection equipment according to claim 7, characterized in that: The sound wave receiving mechanism (100) further comprises an outer cylinder (111) connected to the base (110), a rotating ring (210) is connected to the top of the outer cylinder (111), and the electric telescopic rod (220) is connected to the rotating ring (210).

9. The substation acoustic wave detection equipment according to claim 8, characterized in that: The invention also includes a locking mechanism (400), wherein the locking mechanism (400) includes a first sliding rod (450) telescopically connected to the outer cylinder (111), and the end of the first sliding rod (450) is connected to a locking plate (460). After the sleeve (140) moves upward, the locking plate (460) abuts against the sleeve (140), so that the sleeve (140) is locked to the base (110).

10. The substation acoustic wave detection equipment according to claim 9, characterized in that: The locking mechanism (400) further comprises a second sliding rod (420); A pipeline (440) is arranged in the outer cylinder (111), and when the second sliding rod (420) slides, it is transmitted to the first sliding rod (450) through the pipeline (440), so that the first sliding rod (450) and the second sliding rod (420) slide synchronously and in opposite directions; The bottom of the sleeve (140) is provided with an inclined surface (410), and the end of the second sliding rod (420) is in contact with the outer wall of the sleeve (140). When the sleeve (140) slides, the inclined surface (410) drives the second sliding rod (420) to slide on the outer cylinder (111).

Images