CN112014683A - Dewar noise reduction auscultation device for high-voltage cable fault location - Google Patents

Abstract

The invention relates to a Dewar noise reduction auscultation device for high-voltage cable fault location, which comprises: the tuning fork assembly is arranged in the cavity; the upper end of the pickup assembly penetrates through the lower end of the pipe body along the axial direction of the pipe body and then is connected with the tuning fork assembly; the chassis subassembly is passed to the lower extreme of pickup subassembly, and pickup subassembly can follow chassis subassembly's axial displacement. The above-mentioned scheme that this application provided, the convenience is to soft soil property, the level and smooth or unevenness ground of sclerosis carries out effectual pickup, then carry out the tone through the tuning fork subassembly again, can obtain the best pickup resonance, improve pickup sensitivity, at last because be the vacuum state in the cavity of body, sound conduction that has fine isolated outside is to in the body, the effect of making an uproar has been realized, and then improve pickup identification accuracy, realize effectual pickup and exert pulse cable at cable run and cause the sound that fault point punctures and take place, thereby realize fault point location.

Description

Dewar noise reduction auscultation device for high-voltage cable fault location

Technical Field

The invention relates to the technical field of electric power, in particular to a Dewar noise reduction auscultation device for positioning faults of a high-voltage cable.

Background

At present, because the high-voltage cable line with the voltage level of 110kV and above is long, when the line breaks down, the emergency repair and power restoration work can be carried out by accurately positioning a fault point.

In the fault point positioning process, under the condition that multiple pulses are adopted for carrying out pre-positioning failure, pulse voltage is generally applied to a cable line to enable the fault point to be punctured, and an electromagnetic sound wave method is used for carrying out sound effect auscultation positioning along the line.

Disclosure of Invention

Therefore, it is necessary to provide a dewar noise reduction auscultation device for high-voltage cable fault location, aiming at the problem that the existing fault location is easily affected by sound waves from the space and the fault location is difficult.

The invention provides a Dewar noise reduction auscultation device for high-voltage cable fault location, which comprises:

the pipe body is provided with a cavity along the axial direction, and the cavity is in a vacuum state;

a tuning fork assembly disposed within the cavity;

the upper end of the pickup assembly penetrates through the lower end of the pipe body along the axial direction of the pipe body and then is connected with the tuning fork assembly;

the chassis subassembly, be used for below the chassis subassembly with level ground or uneven ground contact, the lower extreme of pickup subassembly passes the chassis subassembly, just pickup subassembly can be followed the axial displacement of chassis subassembly.

The Dewar noise reduction auscultation device for high-voltage cable fault location is characterized in that when sound is required to be picked up from soft soil ground, the distance between the lower end of the sound pickup assembly and the chassis assembly is adjusted, so that the lower end of the sound pickup assembly extends out of the chassis assembly and is inserted into the soft soil layer, sound of the soft soil layer can be picked up, or when sound is required to be picked up from hardened flat or uneven ground, the distance between the lower end of the sound pickup assembly and the chassis assembly is adjusted, so that the lower end of the sound pickup assembly is located in the chassis assembly, at the moment, the chassis assembly can effectively pick up sound from the hardened flat or uneven ground, then the tuning fork assembly is used for tuning, the best sound pickup resonance can be obtained, the sound pickup sensitivity is improved, and finally, as the cavity of the pipe body is in a vacuum state, sound with good isolation is conducted into the pipe body outside, and then improve the pickup and discern the degree of accuracy, realize effectual picking up and exert the sound that the pulse cable caused the breakdown of fault point to realize fault point location. The device has no electronic components, high reliability, simple manufacture, low price and higher popularization and application value.

In one embodiment, the tubular body comprises an inner dewar tube, an outer dewar tube, a bottom seal ring, a top seal ring, and an ear cap;

the Dewar inner tube cover is established in the Dewar outer tube, the bottom seal ring sets up the lower extreme of Dewar outer tube, the top seal ring sets up the upper end of Dewar outer tube, the earcap setting is in on the top seal ring.

In one embodiment, the pipe body further comprises a vacuum nozzle, the vacuum nozzle is disposed on the top sealing ring, and one end of the vacuum nozzle is communicated with an inner cavity formed between the inner dewar pipe and the outer dewar pipe.

In one embodiment, the tuning fork assembly comprises a tuning fork rod, a tuning fork tuning slider and a spring piece, wherein the tuning fork rod is arranged in the Dewar inner tube and is connected with the pickup assembly;

the tuning fork is arranged at the upper end of the tuning fork rod, the tuning fork frequency modulation sliding block is arranged on the tuning fork, and the spring piece is arranged on the tuning fork frequency modulation sliding block.

In one embodiment, the pickup assembly comprises a pickup rod, and the upper end of the pickup rod penetrates through the bottom seal ring and is connected with the tuning fork rod.

In one embodiment, the pickup assembly further comprises a support ring sleeved on the pickup rod and a pin arranged on the support ring along an axial direction perpendicular to the pickup rod.

In one embodiment, the chassis assembly includes a pickup chassis, a pickup chassis post, a pickup tentacle, and an adjustment member;

the utility model discloses a pickup base plate, including pickup base plate, pickup base plate post, regulating piece and pickup tentacle, pickup base plate post sets up along the axial the upper surface on pickup base plate, the lower extreme of pickup rod passes in proper order pickup base plate post behind the pickup base plate with pickup base plate column connection, the pickup tentacle sets up on the pickup base plate, the regulating piece with pickup tentacle cooperatees, is used for adjusting pickup tentacle keeps away from the one end on pickup base plate with distance between the pickup base plate, so that pickup tentacle can contact with ground.

In one embodiment, the pickup chassis is provided with a plurality of through holes along an axial direction of the pickup chassis, the through holes include a second through hole and a third through hole which are coaxially arranged, the second through hole is located above the third through hole, and the diameter of the second through hole is larger than that of the third through hole;

work as the pickup tentacle corresponds the setting and is in back in the through-hole, the arch on the pickup tentacle side with the second through-hole cooperatees, is located protruding below the pickup tentacle passes stretch out behind the third through-hole.

In one embodiment, the adjusting piece comprises an elastic piece and a pickup disc cover;

pickup cover sets up the upper surface on pickup chassis, the elastic component is located in the second through-hole, just the one end of elastic component with the upper end butt of pickup tentacle, the other end of elastic component with pickup cover orientation the one side butt on pickup chassis.

In one embodiment, the chassis assembly further comprises a second fastener, the second fastener cooperating with the pickup chassis post;

and after the lower end of the pickup rod sequentially penetrates through the pickup chassis column and the pickup chassis, the second fastening piece is used for fastening the pickup rod on the pickup chassis column.

Drawings

Fig. 1 is a schematic structural view of a dewar noise reduction auscultation device for high-voltage cable fault location according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of the tubular body of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is an exploded view of the pickup assembly of FIG. 1;

FIG. 6 is a schematic view of the chassis assembly of FIG. 1;

FIG. 7 is a schematic diagram of the exploded structure of FIG. 6;

FIG. 8 is a cross-sectional view of FIG. 6;

fig. 9 is a schematic structural diagram of the tuning fork assembly in fig. 1.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 and 2, in an embodiment of the present invention, there is provided a dewar noise reduction auscultation apparatus for high voltage cable fault location, including: the pipe body 10, the tuning fork assembly 40, the pickup assembly 20 and the chassis assembly 30, wherein, the pipe body 10 is provided with a cavity along the axial, be vacuum state in the cavity, the tuning fork assembly 40 sets up in the cavity, the upper end of pickup assembly 20 passes behind the lower extreme of pipe body 10 along the axial of pipe body 10, is connected with the tuning fork assembly 40, the lower extreme of pickup assembly 20 passes the chassis assembly 30, and pickup assembly 20 can be along the axial of chassis assembly 30 removal, be used for contacting with level ground or uneven ground below the chassis assembly 30.

By adopting the technical scheme, when the soft soil ground needs to be picked up, the distance between the lower end of the pickup assembly and the chassis assembly is adjusted, so that the lower end of the pickup assembly extends out of the chassis assembly and is inserted into the soft soil layer, the sound of the soft soil layer can be picked up, or when the hardened flat or uneven ground needs to be picked up, the distance between the lower end of the pickup assembly and the chassis assembly is adjusted, so that the lower end of the pickup assembly is positioned in the chassis assembly, at the moment, the chassis assembly can effectively pick up the hardened flat or uneven ground, then the tuning fork assembly is used for tuning, the best pickup resonance can be obtained, the pickup sensitivity is improved, and finally, because the cavity of the pipe body is in a vacuum state, the sound outside is well isolated from being transmitted into the pipe body, the noise elimination effect is realized, and the recognition accuracy is improved, the sound generated by breakdown of a fault point caused by applying pulse cables on a cable line is effectively picked up, so that the fault point is positioned. The device has no electronic components, high reliability, simple manufacture, low price and higher popularization and application value.

In some embodiments, as shown in fig. 3, the tubular body 10 includes an inner dewar tube 101, an outer dewar tube 102, a bottom seal ring 103, a top seal ring 104 and an ear cap 105, wherein the inner dewar tube 101 is sleeved in the outer dewar tube 102, the bottom seal ring 103 is disposed at the lower end of the outer dewar tube 102, the top seal ring 104 is disposed at the upper end of the outer dewar tube 102, and the ear cap 105 is disposed on the top seal ring 104.

Specifically, as shown in fig. 3 and 4, the bottom seal ring 103 in the present application is screwed on the lower end of the outer dewar tube 102 for sealing the lower end of the outer dewar tube 102, the top seal ring 104 is screwed on the upper end of the outer dewar tube 102, and a through hole is provided on the top seal ring 104, and the ear cap 105 is provided on the through hole on the top seal ring 104 for sealing the top seal ring 104.

In some embodiments, in order to evacuate the cavity formed between the outer wall of dewar inner tube 101 and the inner wall of dewar outer tube 102, and form a dewar noise reduction structure, so as to isolate the outside sound from being transmitted into dewar inner tube 101, as shown in fig. 4, tube 10 of the present application further includes a vacuum nozzle 106, wherein vacuum nozzle 106 is disposed on top seal ring 104, and one end of vacuum nozzle 106 is communicated with the inner cavity formed between dewar inner tube 101 and dewar outer tube 102.

Specifically, as shown in fig. 4, a connection hole (not indicated in the figure) is further formed in the top seal ring 104, and the vacuum nozzle 106 is installed on the connection hole, so that when a cavity formed between the outer wall of the dewar inner tube 101 and the inner wall of the dewar outer tube 102 needs to be evacuated, the cavity formed between the outer wall of the dewar inner tube 101 and the inner wall of the dewar outer tube 102 can be evacuated only by connecting the vacuum nozzle 106 with a vacuum pump, thereby achieving a noise elimination effect.

It should be noted that, the vacuum nozzle connection structure in the embodiment of the present application is only an example, and in other alternative solutions, other structures may also be adopted, for example, a mounting hole is provided on a side wall of the outer dewar tube, and the vacuum nozzle is mounted on the mounting hole. The application does not make any special restriction on the connecting structure of the vacuum nozzle, as long as the structure can realize the purpose of the application.

In some embodiments, as shown in fig. 9, the tuning fork assembly 40 of the present application includes a tuning fork rod 401 disposed in the dewar inner tube 101, a tuning fork 402, a tuning fork tuning slider 403, and a spring plate 404, wherein the tuning fork 402 is disposed on an upper end of the tuning fork rod 401, the tuning fork slider 403 is disposed on the tuning fork 402, and the spring plate 404 is disposed on the tuning fork tuning slider 403. The tuning fork assembly is prior art and will not be described herein in a repeated manner.

In some embodiments, as shown in fig. 5, the pickup assembly 20 in the present application includes a pickup rod 201, an upper end of the pickup rod 201 penetrates through the bottom seal ring 103 and is connected to a tuning fork rod 401, when sound is picked up by the pickup rod 201, the sound can be transmitted to a tuning fork 402 through the tuning fork rod 401, then the sound is propagated through resonant amplification of the tuning fork 402, and finally the sound picked up by the pickup rod 201 can be clearly heard by clinging meat ears to the ear caps 105.

In some embodiments, in order to facilitate inserting the sound pickup rod 201 into the soft soil layer, the sound pickup assembly 20 further includes a support ring 202 and pins 203, the support ring 202 is sleeved on the sound pickup rod 201, and the pins 203 are disposed on the support ring 202 along an axial direction perpendicular to the sound pickup rod 201.

Specifically, as shown in fig. 5, a first through hole 2021 is formed in the support ring 202 along the axial direction of the pickup rod 201, meanwhile, a plurality of threaded holes are formed in the side wall of the support ring 202 along the axial direction perpendicular to the pickup rod 201, a groove 2011 is formed in the side wall of the pickup rod 201 along the radial direction of the pickup rod 201, when the pickup rod 201 passes through the first through hole 2021 and the groove 2011 in the pickup rod 201 corresponds to the support ring 202 in position, the support ring 202 can be fixed to the pickup rod 201 by passing the first fastening member 204 through the threaded hole in the side wall of the support ring 202 and then extending into the groove 2011, and at this time, the foot pegs 203 are mounted to other threaded holes in the side wall of the support ring 202.

When the sound picking up device is used, external force acts on the foot nails 203, so that the foot nails 203 are subjected to downward acting force, the support ring 202 is fixed on the sound picking up rod 201, and the foot nails 203 are fixed on the support ring 202, so that the force acting on the foot nails 203 can be transmitted to the sound picking up rod 201 through the support ring 202, and the lower end of the sound picking up rod 201 is inserted into a soft soil layer.

Further, as shown in fig. 5, the first fastening member 204 is a bolt, an external thread is provided at one end of the foot pin 203, four threaded holes are uniformly provided on the side wall of the support ring 202 along an axial direction perpendicular to the sound pick-up bar 201, the first fastening member 204 and the foot pin 203 are sequentially screwed into the threaded holes on the sound pick-up bar 201 at intervals, and the first fastening member 204 can extend into the groove 2011 after passing through the corresponding threaded hole.

It should be noted that the structure of the above embodiment that the support ring is fixed on the sound pick-up bar by the first fastener is only an example, and in other alternative solutions, other structures may be adopted, for example, the first through hole on the support ring is in interference fit with the sound pick-up bar. This application does not make special restriction to the connection structure of support ring and sound-collecting rod, as long as above-mentioned structure can realize the purpose of this application alright.

In some embodiments, in order to facilitate the chassis assembly 30 to contact with a flat ground or an uneven ground, as shown in fig. 6, the chassis assembly 30 includes a pickup chassis 301, a pickup chassis column 303, a pickup tentacle 304, and an adjusting member, where the pickup chassis column 303 is axially disposed on the upper surface of the pickup chassis 301, the lower end of the pickup rod 201 sequentially passes through the pickup chassis column 303 and the pickup chassis 301 and then is connected to the pickup chassis column 303, the pickup tentacle 304 is disposed on the pickup chassis 301, and the adjusting member is engaged with the pickup tentacle 304 and is configured to adjust a distance between an end of the pickup tentacle 304 away from the pickup chassis 301 and the pickup chassis 301, so that the pickup tentacle 304 can contact with the ground.

Specifically, as shown in fig. 8, the sound pickup chassis 301 in the present application is integrally molded with a sound pickup chassis post 303, and the sound pickup chassis post 303 is provided on the upper surface of the sound pickup chassis 301 in the axial direction from the third through hole 3012 to the second through hole 3011, while the sound pickup chassis post 303 is provided with a fourth through hole 3032 in the axial direction thereof. When the sound-collecting rod 201 is installed, the sound-collecting rod 201 only needs to pass through the fourth through hole 3032 on the sound-collecting chassis column 303 and then pass through the chassis 301.

When the soft soil ground needs to be picked up, the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is adjusted, so that the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is larger than the distance between the lower end of the sound pickup tentacle 304 and the bottom surface of the sound pickup chassis 301, then the lower end of the sound pickup rod 201 is inserted into the soft soil layer, the sound picked up by the sound pickup rod 201 from the soft soil layer is transmitted to the tuning fork rod 401 and then transmitted to the tuning fork 402 through the tuning fork rod 401, then the sound is amplified and transmitted through the tuning fork 402 in a resonant mode, and finally the sound picked up by the sound pickup rod 201 can be clearly heard by tightly attaching meat ears to the earcap 105; when the hardened flat or uneven ground needs to be picked up, the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is adjusted, so that the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is smaller than the distance between the lower end of the sound pickup tentacle 304 and the bottom surface of the sound pickup chassis 301, at the moment, the adjusting piece is matched with the sound pickup tentacle 304, so that one end, away from the sound pickup chassis 301, of the sound pickup tentacle 304 can be in contact with the ground, then, the sound picked up by the sound pickup tentacle 304 and obtained by the hardened flat or uneven ground is transmitted to the tuning fork rod 401 through the sound pickup rod 201, then is transmitted to the tuning fork 402 through the tuning fork rod 401, then is amplified and transmitted through the tuning fork 402 in a resonant mode, and finally, the sound picked up.

Further, as shown in fig. 7 and 8, the pickup chassis 301 is provided with a plurality of through holes along the axial direction of the pickup chassis 301, the through holes include a second through hole 3011 and a third through hole 3012 which are coaxially arranged, the second through hole 3011 is located above the third through hole 3012, and the diameter of the second through hole 3011 is greater than the diameter of the third through hole 3012, when the pickup tentacle 304 is correspondingly arranged in the through holes, a protrusion 3041 on the side surface of the pickup tentacle 304 is matched with the second through hole 3011, and the pickup tentacle 304 located below the protrusion 3041 extends out after passing through the third through hole 3012.

In some embodiments, the adjusting member in the present application includes an elastic member 305 and a pickup cover 306, where the elastic member 305 may be a compression spring, the pickup cover 306 is disposed on the upper surface of the pickup chassis 301, the elastic member 305 is located in the second through hole 3011, one end of the elastic member 305 abuts against the upper end of the pickup tentacle 304, and the other end of the elastic member 305 abuts against a surface of the pickup cover 306 facing the pickup chassis 301.

Specifically, as shown in fig. 6 to 8, the pickup plate cover 306 is provided with a fifth through hole 3061 in its axial direction, and the fifth through hole 3061 corresponds to the outer diameter of the pickup plate post 303. When the whole device is installed, after the pickup tentacle 304 is placed into the second through hole 3011, the elastic piece 305 is placed at the upper end of the pickup tentacle 304, then the pickup cover 306 is covered on the pickup chassis 301 after passing through the pickup chassis post 303, finally the pickup cover 306 is fixed on the pickup chassis 301 after sequentially passing through the threaded hole on the pickup cover 306 and the threaded hole 3013 on the pickup chassis 301 by using the bolt 307, at this moment, one end of the elastic piece 305 is abutted against the upper end of the pickup tentacle 304, and the other end of the elastic piece 305 is abutted against one surface of the pickup cover 306 facing the pickup chassis 301

When the device is used, a plurality of pickup tentacles 304 are firstly contacted with the ground, and if the ground is flat, all the pickup tentacles 304 can be well contacted with the ground for pickup under the action force of the elastic pieces 305; under the ground unevenness condition, through pressing pickup chassis 301 downwards, pickup tentacle 304 in pickup chassis 301 will be at external force effect extrusion elastic component 305 to just can make all pickup tentacles 304 all can realize good contact with ground, reach and pick up the sound on ground, after accomplishing ground pickup, move aside this device, at this moment pickup tentacle resumes initial position under the effect of inside elastic component.

It should be noted that, the structure in which the pickup cover and the pickup base plate are connected by the bolt in the embodiment of the present application is merely an example, and in other alternative schemes, other structures may be adopted, for example, the pickup cover is mounted on the pickup base plate by a snap. The present application does not impose any particular restrictions on the connection structure of the pickup base plate and the pickup cover, as long as the above-described structure can achieve the object of the present application.

In some embodiments, when the sound pick-up stick 201 passes through the fourth through hole 3032 on the sound pick-up chassis column 303 and then passes through the chassis 301, in order to fix the position of the sound pick-up stick 201 and the sound pick-up chassis column 303, as shown in fig. 7 and 8, the chassis assembly 30 in this application further includes a second fastening member 302, the second fastening member 302 is engaged with the sound pick-up chassis column 303, and after the lower end of the sound pick-up stick 201 passes through the sound pick-up chassis column 303 and the sound pick-up chassis 301 in sequence, the second fastening member 302 is used to fasten the sound pick-up stick 201 on the sound pick-up chassis column 303.

Specifically, there is a connection hole 3031 along the axial direction perpendicular to the pickup chassis column 303 on the pickup chassis column 303, and there are a plurality of screw holes along its axial interval on the side wall of the pickup rod 201, and after the lower end of the pickup rod 201 passes through the pickup chassis column 303 and the pickup chassis 301 in sequence, the second fastener 302 is used, for example, a bolt passes through the connection hole 3031 and then is connected with the screw hole on the side wall of the pickup rod 201, so that the relative position between the pickup rod 201 and the pickup chassis column 303 can be fixed.

It should be noted that, the structure that the relative position of the sound-collecting rod and the sound-collecting chassis column is fixed by the bolt in the embodiment of the present application is merely an example, and in other alternative schemes, other structures may also be adopted, for example, an internal thread is provided on an inner wall of the fourth through hole on the sound-collecting chassis column, an external thread is provided on the sound-collecting rod, and the sound-collecting rod is in threaded connection with the sound-collecting chassis column. The application does not make special restriction to the connection structure of sound picking rod and sound picking chassis post, as long as above-mentioned structure can realize the purpose alright of this application.

In summary, when the device is used, when a soft soil ground needs to be picked up, the relative position between the sound pickup rod 201 and the sound pickup chassis column 303 is adjusted by rotating the second fastener 302, so that the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 can be adjusted, the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is larger than the distance between the lower end of the sound pickup tentacle 304 and the bottom surface of the sound pickup chassis 301, then the lower end of the sound pickup rod 201 is inserted into the soft soil layer, the sound picked up by the sound pickup rod 201 is transmitted to the tuning fork rod 401, then transmitted to the tuning fork 402 through the tuning fork rod 401, then amplified and transmitted through resonance of the tuning fork 402, and finally the sound picked up by the sound pickup rod 201 can be clearly heard by sticking meat ears to the ear caps 105;

when the hardened flat or uneven ground needs to be picked up, the relative position of the sound pickup rod 201 and the sound pickup chassis column 303 is adjusted by rotating the second fastener 302, so that the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 can be adjusted, the distance between the lower end of the sound pickup rod 201 and the bottom surface of the sound pickup chassis 301 is smaller than the distance between the lower end of the sound pickup tentacle 304 and the bottom surface of the sound pickup chassis 301, at the moment, a plurality of sound pickup tentacles 304 are contacted with the ground, and if the ground is flat, all the sound pickup tentacles 304 can be well contacted with the ground under the action force of the elastic piece 305 to pick up sound; under the condition that the ground is uneven, the pin 203 drives the sound pickup rod 201 to move downwards, the sound pickup rod 201 drives the sound pickup chassis 301 to move downwards, the sound pickup tentacles 304 in the sound pickup chassis 301 can press the elastic pieces 305 under the action of external force, so that all the sound pickup tentacles 304 can be in good contact with the ground to pick up the sound on the ground, after the sound pickup on the ground is completed, the sound pickup tentacles 304 can transmit the sound picked up to the hardened flat or uneven ground to the tuning fork rod 401 through the sound pickup rod 201, then transmit the sound to the tuning fork 402 through the tuning fork rod 401, then perform resonance amplification and propagation through the tuning fork 402, and finally, the sound picked up by the sound pickup rod 201 can be clearly heard by closely attaching the meat ears to the earcap 105.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a stethoscope device that makes an uproar falls in dewar for high tension cable fault location which characterized in that includes:

the pipe body (10), the pipe body (10) is provided with a cavity along the axial direction, and the cavity is in a vacuum state;

a tuning fork assembly (40), the tuning fork assembly (40) disposed within the cavity;

the upper end of the pickup assembly (20) penetrates through the lower end of the pipe body (10) along the axial direction of the pipe body (10) and then is connected with the tuning fork assembly (40);

the chassis assembly (30), be used for below the chassis assembly (30) with level ground or uneven ground contact, the lower extreme of pickup assembly (20) passes chassis assembly (30), just pickup assembly (20) can follow the axial displacement of chassis assembly (30).

2. The Dewar noise reduction auscultation device for high voltage cable fault location according to claim 1, wherein the tube body (10) comprises an inner Dewar tube (101), an outer Dewar tube (102), a bottom seal ring (103), a top seal ring (104), and an ear cap (105);

dewar inner tube (101) cover is established in Dewar outer tube (102), bottom seal ring (103) set up the lower extreme of Dewar outer tube (102), top seal ring (104) set up the upper end of Dewar outer tube (102), earcap (105) set up on top seal ring (104).

3. The Dewar noise reduction auscultation device for high voltage cable fault location according to claim 2, wherein the tube body (10) further comprises a vacuum air tap (106), the vacuum air tap (106) is disposed on the top seal ring (104), and one end of the vacuum air tap (106) is communicated with an inner cavity formed between the Dewar inner tube (101) and the Dewar outer tube (102).

4. The Dewar noise reduction auscultation device for high-voltage cable fault location according to claim 2 or 3, characterized in that the tuning fork assembly (40) comprises a tuning fork rod (401), a tuning fork (402), a tuning fork tuning slider (403) and a spring leaf (404) which are arranged in the Dewar inner tube (101), wherein the tuning fork rod (401) is connected with the pickup assembly (20);

the tuning fork (402) is arranged at the upper end of the tuning fork rod (401), the tuning fork frequency modulation slider (403) is arranged on the tuning fork (402), and the spring piece (404) is arranged on the tuning fork frequency modulation slider (403).

5. The Dewar noise reduction auscultation device for high-voltage cable fault location according to claim 4, characterized in that the pickup assembly (20) comprises a pickup rod (201), and the upper end of the pickup rod (201) passes through the bottom seal ring (103) and then is connected with the tuning fork rod (401).

6. The Dewar noise-reducing auscultation device for high-voltage cable fault location according to claim 5, characterized in that the pickup assembly (20) further comprises a support ring (202) and a foot pin (203), the support ring (202) is sleeved on the pickup rod (201), and the foot pin (203) is arranged on the support ring (202) along an axial direction perpendicular to the pickup rod (201).

7. The Dewar noise reduction auscultation device for high voltage cable fault location according to claim 5, wherein the chassis assembly (30) comprises a pickup chassis (301), a pickup chassis post (303), a pickup tentacle (304), and an adjustment member;

pickup chassis post (303) set up along the axial the upper surface of pickup chassis (301), the lower extreme of pickup stick (201) passes pickup chassis post (303) in proper order, pickup chassis (301) back with pickup chassis post (303) are connected, pickup tentacle (304) set up on pickup chassis (301), the regulating part with pickup tentacle (304) cooperate for adjust pickup tentacle (304) keep away from pickup chassis (301) one end with the distance between pickup chassis (301), so that pickup tentacle (304) can contact with the ground.

8. The Dewar noise reduction auscultation device for high-voltage cable fault location according to claim 7, wherein the pickup chassis (301) is provided with a plurality of through holes along an axial direction of the pickup chassis (301), the through holes comprise a second through hole (3011) and a third through hole (3012) which are coaxially arranged, the second through hole (3011) is located above the third through hole (3012), and the diameter of the second through hole (3011) is larger than that of the third through hole (3012);

when the pickup tentacle (304) is correspondingly arranged in the through hole, a protrusion (3041) on the side surface of the pickup tentacle (304) is matched with the second through hole (3011), and the pickup tentacle (304) below the protrusion (3041) penetrates through the third through hole (3012) and then extends out.

9. The Dewar noise-reducing auscultation device for high-voltage cable fault location according to claim 8, wherein the adjusting member comprises an elastic member (305) and a pickup cap (306);

pickup plate cover (306) sets up the upper surface of pickup chassis (301), elastic component (305) are located in second through-hole (3011), just the one end of elastic component (305) with the upper end butt of pickup tentacle (304), the other end of elastic component (305) with pickup plate cover (306) orientation the one side butt of pickup chassis (301).

10. The Dewar noise reducing auscultation device for high voltage cable fault location of claim 7, wherein the chassis assembly (30) further comprises a second fastener (302), the second fastener (302) mating with the pickup chassis post (303);

when the lower end of the sound-collecting rod (201) sequentially passes through the sound-collecting chassis column (303) and the sound-collecting chassis (301), the second fastener (302) is used for fastening the sound-collecting rod (201) on the sound-collecting chassis column (303).

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