CN110109175B - Reducing type seismic wave collecting device - Google Patents

Reducing type seismic wave collecting device Download PDF

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Publication number
CN110109175B
CN110109175B CN201910483535.1A CN201910483535A CN110109175B CN 110109175 B CN110109175 B CN 110109175B CN 201910483535 A CN201910483535 A CN 201910483535A CN 110109175 B CN110109175 B CN 110109175B
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China
Prior art keywords
reducing
diameter
push rod
hole
base
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CN201910483535.1A
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CN110109175A (en
Inventor
王浩
陈舞
张厚江
覃卫民
张国华
田湖南
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Wuhan Institute of Rock and Soil Mechanics of CAS
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/162Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G01V1/181Geophones
    • G01V1/184Multi-component geophones

Abstract

The invention discloses a variable-diameter seismic wave acquisition device. The device is sequentially connected with an operating head, a push rod seat, a sleeve, a reducing assembly, an end head seat and an end head along the length direction of a drilling direction, namely a rock surrounding hole. The variable-diameter assembly can extend out of the device in a variable distance perpendicular to the length direction of the device and is closely attached to the wall of a surrounding rock hole, so that the influence of interference waves formed by a metal sleeve is eliminated, the complicated construction steps caused by using butter, epoxy resin, an anchoring agent or non-shrinkable cement mortar added with special components as a coupling agent are avoided, and the precision of field data acquisition is improved.

Description

Reducing type seismic wave collecting device
Technical Field
The invention relates to the field of engineering geophysical prospecting, in particular to a variable-diameter seismic wave acquisition device for tunnel advanced geological prediction.
Background
Tunnel engineering is an important project for railway, highway, water conservancy and hydropower projects and the like. In recent years, the number and length of tunnel projects are increased, the complexity and construction difficulty of corresponding geological conditions are increased, and the situation that geological data in an exploration stage cannot meet the tunnel projects is common. The engineering investigation is expensive and damages the foundation, so the tunnel advanced geological prediction technology is widely applied.
An intelligent type explosive wave acquisition probe is disclosed in patent document with application number 201610598642.5, and comprises a drill collar shell, wherein the drill collar shell is connected with a conical end, the interior of the drill collar shell is divided into a detection cabin, a chip cabin and a battery cabin, a three-component acceleration detector is arranged in the detection cabin, a chip mainboard is arranged in the chip cabin, an ARM A7 chip, a 24-bit A/D converter, an instantaneous floating-point amplifier, a filter, a preamplifier, a synchronous trigger unit and a memory are arranged on the chip mainboard, and a power supply is arranged in the battery cabin. The detector, the chip main board and the power supply are integrated into a whole in the patent literature, so that offline work can be realized, and an unmanned acquisition mode on an acquisition site is realized. However, in the field experiment, the diameter can not be changed in the radial direction, so that the diameter can be closely attached to surrounding rock holes with different internal sizes and environments, the direct coupling with a drilling rock body needs to be realized through a coupling agent, and the reality of field data is influenced.
At present, widely used geological forecast equipment at home and abroad comprises a tunnel geological advanced forecast system (TSP) of Switzerland, a tunnel seismic wave reflector tracking technology (TRT) of America, a new tunnel geological advanced forecast Technology (TGP) of China and the like, wherein the method comprises the steps of punching and charging (20g-100g are different) on the side wall of a tunnel, and exciting shot by shot. The direct close contact or coupling of the three-component acceleration detector and the drilling rock mass is realized by using a metal sleeve or a coupling agent, so that the good reception of the field data is realized. The tunnel blasting detector has the defects that the tunnel rock wall can be damaged by blasting, meanwhile, the detector must be connected with the computer host, and when the detector is fixedly driven by the blast, a collection person must endure great sound waves and severe environment in the tunnel, and broken stones are likely to fall off and injure the tunnel after being vibrated. Meanwhile, during collection, construction is complicated, the flow is complex, devices such as a host machine are heavy, independent power supply cannot be achieved, the collection time is long, and the operation progress of a constructor is delayed.
Disclosure of Invention
The embodiment of the invention at least discloses a variable-diameter seismic wave acquisition device, which can enable a movable cone of the device to extend out in a vertical drilling direction and be closely attached to the inner wall of a surrounding rock hole, eliminate the influence of interference waves formed by a metal sleeve, reduce the complicated construction steps caused by adopting butter, epoxy resin, an anchoring agent or non-shrinkable cement mortar added with special components as a coupling agent, and simultaneously improve the accuracy of acquiring field data.
The device comprises a push rod, a push rod seat, a diameter-variable assembly, an end head seat and an end head which are sequentially connected along a drilling direction;
the end head is constructed to be a drill bit at one end part, and a mounting cavity is formed by detachably connecting the other end part with one end part of the end head seat, and the mounting cavity is provided with a three-component acceleration detector;
the reducing assembly is connected between the end head seat and the push rod seat and comprises a front reducing base, a rear reducing base, a reducing rod and at least one movable cone;
the front reducing base is provided with a front reducing through hole penetrating along the drilling direction, and one end of the front reducing base is coaxially connected with the push rod seat;
the rear reducing base is provided with a rear reducing hole along the drilling direction, one end of the rear reducing base is coaxially connected with the end socket, the surface of the other end of the rear reducing base is connected with the movable cone in a sliding mode, and one end, facing the rear reducing hole, of the movable cone is provided with a wedge-shaped surface;
the reducer rod is sequentially constructed into a front shaft, a middle shaft and a rear shaft along the drilling direction;
the front shaft is in threaded connection with the front variable-diameter through hole, all or part of the middle shaft is positioned in the front variable-diameter through hole and is constructed with a conical surface matched with the wedge surface, and the rear shaft extends into the rear variable-diameter hole;
the push rod seat is provided with a push rod hole penetrating along the drilling direction, one end part of the push rod seat is fixed with the front diameter-variable base, and the push rod penetrates through the push rod hole and is coaxially connected with the front shaft;
the three-component acceleration detector communicates with the outside through a signal line passing through all or part of the device.
In some embodiments of the disclosure, the apparatus includes at least two reducing assemblies connected in series along the drilling direction;
the front reducing base of any reducing assembly is coaxially connected with the adjacent push rod base or the rear reducing base of the adjacent reducing assembly;
the rear reducing base of any reducing assembly is coaxially connected with the adjacent end head seat or the front reducing base of the adjacent reducing assembly;
the front shaft of any diameter-variable component is coaxially connected with the adjacent push rod or the rear shaft of the adjacent diameter-variable component;
and the rear shaft of any reducing assembly extends into the rear reducing hole or is coaxially connected with the front shaft of the adjacent reducing assembly.
In some embodiments of the present disclosure, the rear shaft is threadedly connected to the rear variable diameter hole.
In some embodiments of the present disclosure, a return spring is fixed between the movable cone and the front variable diameter base.
In some embodiments of the disclosure, the end surface of the rear reducing base facing the front reducing base is configured with a limiting groove perpendicular to the drilling direction, the limiting groove faces the rear reducing hole, and the movable cone is limited in the limiting groove to slide.
In some embodiments of the disclosure, the end surface of the rear reducing base facing the front reducing base is a concave platform inclined toward the rear reducing hole, and the limiting groove is configured on the surface of the concave platform.
In some embodiments of the disclosure, the push rod and the front reducing base adjacent to the reducing assembly are both screwed in a sleeve.
In some embodiments of the present disclosure, the push rod is detachably connected to the front shaft of the adjacent diameter-variable assembly.
In some embodiments of the disclosure, a sliding range of the movable cone in the limiting groove is less than or equal to a depth of the rear variable diameter hole.
In some embodiments of the present disclosure, the three-component acceleration detector is in wireless communication with the external communication.
In view of the above, other features and advantages of the disclosed exemplary embodiments will become apparent from the following detailed description of the disclosed exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a cross-sectional view of a variable diameter seismic acquisition device according to an embodiment;
FIG. 2 is a cross-sectional view of a reducer assembly according to one embodiment;
FIG. 3 is a cross-sectional view of a reducer bar according to an embodiment;
FIG. 4 is a partial cross-sectional view of a preferred construction of a reducer assembly according to one embodiment;
FIG. 5 is a cross-sectional view of a preferred construction of the reducer assembly according to one embodiment;
FIG. 6 is a cross-sectional view of a second variable-diameter seismic acquisition device according to an embodiment;
FIG. 7 is a cross-sectional view of a reducer bar according to a second embodiment.
The attached drawings are marked as follows:
100. an operating head; 200. a sleeve; 300. a push rod seat; 310. an intermediate lever; 400. a variable diameter component; 410. a front variable diameter base; 411. a front variable diameter through hole; 420. a rear variable diameter base; 421. a rear variable diameter hole; 430. the movable cone. 440. A reducer bar; 441. a front axle; 442. a middle shaft; 443. a rear axle; 500. an end head seat; 600. and (4) a terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as disclosed in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment discloses a variable-diameter seismic wave acquisition device. FIG. 1 shows a block diagram of the present apparatus; the movable cone 430 can extend out of a variable distance in a direction perpendicular to the length direction of the device and is closely attached to the wall of a surrounding rock hole, so that the influence of interference waves formed by the metal sleeve is eliminated, the complex construction steps caused by adopting butter, epoxy resin, an anchoring agent or non-shrinkable cement mortar added with special components and the like as a coupling agent are reduced, and meanwhile, the precision of collecting field data can be improved.
In fig. 1, the apparatus sequentially includes an operating head 100, a push rod seat 300, a sleeve 200, a reducing assembly 400, an end seat 500 and an end 600 along a drilling direction, i.e., a length direction of a rock surrounding hole.
The end of the present embodiment tip 600 facing the bottom of the surrounding rock bore is a tapered drill bit, the end facing the opening of the surrounding rock bore is recessed inwardly with a tip groove, and the inner wall of the tip groove is configured with an internal thread.
The end of the tip seat 500 facing the tip 600 in this embodiment is a first threaded post having a diameter equal to that of the tip groove, and the first threaded post is coupled with the internal thread of the tip groove, so that the opening of the tip groove is blocked by the first threaded post to form an installation cavity. The conventional three-component acceleration detector is fixed in the device of the embodiment. The three-component acceleration detector is a special detector special for multi-wave exploration, and is provided with three mutually perpendicular sensors for recording three-component seismic waves (P waves, SH waves and SV waves).
The push rod base 300 of the present embodiment is cylindrical and has a push rod hole formed at the center thereof in the drilling direction. The end part of the implementation push rod facing the opening of the surrounding rock hole is provided with an operating head 100 used for rotating with a synchronous push rod, and the end part facing the bottom of the surrounding rock hole penetrates through the push rod hole to drive the operating end of the reducing assembly 400. When the operation end of the reducing assembly 400 is driven by the push rod, the reducing assembly 400 can enable the device of the embodiment to be relatively fixed with the surrounding rock hole, so that the three-component acceleration detector can effectively, accurately and quickly acquire and record three-component seismic waves.
The outer walls of the push rod and the push rod seat 300 are respectively in threaded connection with the sleeve 200. The operation mode of the apparatus of this embodiment is to hold or fix the casing 200, and then rotate the operating head 100 to move the push rod toward the bottom of the surrounding rock hole, so that the operating end of the reducing assembly 400 is driven by the push rod.
In some embodiments, the push rod is threaded with an intermediate rod 310 in the push rod seat 300, and the intermediate rod 310 is integrally formed with the front shaft 441. The push rod and sleeve 200 can be quickly removed from the push rod seat 300.
The reducing assembly 400 and the structural relationship between the reducing assembly 400 and the apparatus disclosed in this embodiment are shown in fig. 2 and 3. The reducing assembly 400 of the present embodiment is installed between the push rod holder 300 and the tip holder 500. The reducing assembly 400 comprises a front reducing base 410, a rear reducing base 420, a reducing rod 440 and four movable cones 430.
Fig. 1 and 2 show that the front reducing base 410 is a cylinder with the same diameter as the push rod base 300, and is integrally formed at the end of the push rod base 300 facing the bottom of the rock surrounding hole, a front reducing through hole 411 which penetrates through the middle of the front reducing base 410 is formed along the drilling direction, and an internal thread is arranged on the inner wall of the front reducing through hole 411. The rear reducing base 420 is a cylinder having the same diameter as the tip seat 500, and is integrally formed at an end of the tip seat 500 facing the opening of the rock surrounding hole. The middle part of the front reducing base 410 is provided with a rear reducing hole 421 which penetrates along the drilling direction.
The bottoms of the four movable cones 430 are limited in four limiting grooves on the surface of the end of the rear reducing base 420. Meanwhile, the four limiting grooves of the movable cone 430 uniformly surround the rear reducing hole 421, one end of each limiting groove faces the rear reducing hole 421, and the other end of each limiting groove is vertically drilled and communicated with the outside of the device. The ends of all movable cones 430 facing the rear reducer holes 421 are configured as wedge surfaces on the sides facing the front reducer bases 410. The sliding range of the general movable cone 430 in the limiting groove is less than or equal to the depth of the rear variable diameter hole 421.
Fig. 3 shows the structure of the reducer shaft 440 of the present embodiment. The reducer shaft 440 is integrally formed in the drilling direction as a front shaft 441, a middle shaft 442, and a rear shaft 443. The front shaft 441 is positioned in the front reducing through hole 411 and has an outer side with an external thread capable of matching with the internal thread of the front reducing through hole 411, and the end of the front shaft 441 facing the push rod seat 300 is coaxially fixed with the push rod as an operating end of the reducing assembly 400. The central shaft 442 is located inside the front variable diameter through hole 411 when the variable diameter assembly 400 is not driven, and is configured with a tapered surface that mates with the tapered surface of each movable cone 430. The rear shaft 443 extends into the rear variable diameter hole 421 in the drilling direction.
When the operating head 100 is rotated by an external force and the casing 200 is fixed, the push rod and the reducer rod 440 rotate synchronously and are pushed towards the bottom of the surrounding rock hole along the drilling direction in the reducing assembly 400 disclosed in this embodiment. The central axis 442 of the reducer 440 is matched with the wedge surface and the conical surface in the pushing process, so that the four movable cones 430 face the outside of the device along the limiting groove, namely the side wall of the rock surrounding hole. After the movable cone 430 of the embodiment is fully abutted against the side wall of the surrounding rock hole, the device and the surrounding rock are relatively fixed, so that the three-component acceleration detector can well receive the reflected seismic wave signals.
When the operating head 100 is rotated by a reverse applied external force and the sleeve 200 is fixed, the movable cone contacts and abuts against the side wall of the surrounding rock hole, and then the device can be directly taken out of the surrounding rock hole.
As shown in fig. 1, the operating head 100, the push rod, the front shaft 441, the middle shaft 442, the rear shaft 443, and the tip seat 500 of the present embodiment are all provided with a small wire guide hole for the three-component acceleration detector, so that the data collected by the three-component acceleration detector can be communicated to the outside of the present apparatus.
In some embodiments, all components of the device are made entirely of non-signal shielding material, such as rigid plastic or the like. The three-component acceleration detector can be internally or externally provided with a wireless communication module, such as a WI-FI or LORA transceiver module, and the wireless communication module enables data collected by the three-component acceleration detector to be wirelessly communicated to the outside of the device.
Preferably, as shown in fig. 4, the end surface of the rear reducing base 420 facing the front reducing base 410 is a rear concave platform inclined toward the rear reducing hole 421. The limiting groove is arranged at the rear boss and is not perpendicular to the drilling direction any more, but one end of the limiting groove faces the rear reducing hole 421 along the rear boss, and the other end faces the outside of the device along the rear boss. The end surface of the front reducing base 410 facing the rear reducing base 420 is a front concave platform inclined toward the rear reducing hole 421. The four movable cones 430 are parallelograms in cross section as in fig. 4, the parallelograms being inclined in the drilling direction towards the bottom of the surrounding rock bore.
The preferred movable cone 430 can be pushed out by the conical surface of the middle shaft 442 of the reducing rod 440 obliquely relative to the drilling direction to abut against the side wall of the surrounding rock hole, so that the device can be used for surrounding rock holes in complex environments, and the practicability of the device is improved. Meanwhile, after the movable cone 430 is ejected out by the conical surface of the middle shaft 442 of the reducing rod 440, the movable cone 430 can fully extend into the space between the front reducing base 410 and the rear reducing base 420 along the limiting groove under the action of self gravity, so that the device can be taken out conveniently when the use is finished.
Preferably, as shown in fig. 5, the rear shaft 443 of the reducer shaft 440 is threadedly coupled to the rear reducer hole 421. The threaded connection between the rear shaft 443 and the rear variable diameter hole 421 keeps the front variable diameter base 410, the rear variable diameter base 420, the tip seat 500, the push rod seat 300, and the sleeve 200 fixed relatively all the time, so as to prevent the tip seat 500 and the tip 600 from rotating in the surrounding rock hole to affect the use of the device or damage the inside of the surrounding rock hole when the wedge surface of the movable cone 430 abuts against the cone surface of the middle shaft 442.
In some embodiments, a return spring is fixed between the movable cone 430 and the front variable diameter base 410 or the rear variable diameter base 420, so that the movable cone 430 can extend into the space between the front variable diameter base 410 and the rear variable diameter base 420 under the action of the return spring.
Example two
Fig. 6 and 7 show a difference between the apparatus of the present embodiment and the apparatus of the first embodiment in that two sets of diameter-variable assemblies 400 are sequentially connected between the push rod holder 300 and the tip holder 500 along the drilling direction.
Fig. 6 shows that the front reducing seat 410 of the left reducing assembly 400 is integrally formed with the push rod seat 300; the rear reducing assembly 400 is integrally formed with the front reducing assembly 400 of the right reducing assembly 400 in the drawing. The rear reducing seat 420 of the right reducing assembly 400 is integrally formed with the tip seat 500 in fig. 6. Fig. 7 shows that the front shaft 441 of the reducer shaft 440 of the left reducer assembly 400 is integrally formed with the intermediate shaft 310, and the rear shaft 443 is integrally formed with the front shaft 441 of the reducer shaft 440 of the right reducer assembly 400.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A variable-diameter seismic wave acquisition device is characterized in that,
the device comprises a push rod, a push rod seat, a diameter-variable assembly, an end head seat and an end head which are sequentially connected along a drilling direction;
the end head is constructed to be a drill bit at one end part, and a mounting cavity is formed by detachably connecting the other end part with one end part of the end head seat, and the mounting cavity is provided with a three-component acceleration detector;
the reducing assembly is connected between the end head seat and the push rod seat and comprises a front reducing base, a rear reducing base, a reducing rod and at least one movable cone;
the front reducing base is provided with a front reducing through hole penetrating along the drilling direction, and one end of the front reducing base is coaxially connected with the push rod seat;
the rear reducing base is provided with a rear reducing hole along the drilling direction, one end of the rear reducing base is coaxially connected with the end socket, the surface of the other end of the rear reducing base is connected with the movable cone in a sliding mode, and one end, facing the rear reducing hole, of the movable cone is provided with a wedge-shaped surface;
the reducer rod is sequentially constructed into a front shaft, a middle shaft and a rear shaft along the drilling direction;
the front shaft is in threaded connection with the front variable-diameter through hole, all or part of the middle shaft is positioned in the front variable-diameter through hole and is constructed with a conical surface matched with the wedge surface, and the rear shaft extends into the rear variable-diameter hole;
the push rod seat is provided with a push rod hole penetrating along the drilling direction, one end part of the push rod seat is fixed with the front diameter-variable base, and the push rod penetrates through the push rod hole and is coaxially connected with the front shaft;
the three-component acceleration detector communicates with the outside through a signal line passing through all or part of the device.
2. The varied-diameter seismic wave acquisition apparatus of claim 1,
the device comprises at least two reducing assemblies which are sequentially connected along the drilling direction;
the front reducing base of any reducing assembly is coaxially connected with the adjacent push rod base or the rear reducing base of the adjacent reducing assembly;
the rear reducing base of any reducing assembly is coaxially connected with the adjacent end head seat or the front reducing base of the adjacent reducing assembly;
the front shaft of any diameter-variable component is coaxially connected with the adjacent push rod or the rear shaft of the adjacent diameter-variable component;
and the rear shaft of any reducing assembly extends into the rear reducing hole or is coaxially connected with the front shaft of the adjacent reducing assembly.
3. The varied-diameter seismic wave acquisition apparatus of claim 2,
the rear shaft is in threaded connection with the rear variable-diameter hole.
4. The varied-diameter seismic wave acquisition apparatus of claim 2,
and a return spring is fixed between the movable cone and the front reducing base.
5. The varied-diameter seismic wave acquisition apparatus of claim 2,
the end surface of the rear reducing base facing the front reducing base is provided with a limiting groove perpendicular to the drilling direction, the limiting groove faces the rear reducing hole, and the movable cone is limited by the limiting groove to slide.
6. The varied-diameter seismic wave acquisition apparatus of claim 5,
the end surface of the rear reducing base facing the front reducing base is a concave platform inclined towards the rear reducing hole, and the limiting groove is formed in the surface of the concave platform.
7. The varied-diameter seismic wave acquisition apparatus of claim 2,
the push rod and the front reducing base adjacent to the reducing assembly are in threaded connection in a sleeve.
8. The varied-diameter seismic wave acquisition apparatus of claim 7,
the push rod is detachably connected with the front shaft adjacent to the reducing assembly.
9. The varied-diameter seismic wave acquisition apparatus of claim 5,
the sliding range of the movable cone in the limiting groove is smaller than or equal to the depth of the rear variable-diameter hole.
10. The varied-diameter seismic wave acquisition apparatus of claim 2,
the three-component acceleration detector is in wireless communication with the external communication.
CN201910483535.1A 2019-06-04 2019-06-04 Reducing type seismic wave collecting device Active CN110109175B (en)

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CN110673205B (en) * 2019-11-05 2021-05-25 合肥工业大学 Micro-seismic sensor taking and placing device with strain gauge pasting structure and using method thereof

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US20040065437A1 (en) * 2002-10-06 2004-04-08 Weatherford/Lamb Inc. In-well seismic sensor casing coupling using natural forces in wells
US7918307B2 (en) * 2004-02-03 2011-04-05 United Service Alliance, Inc. Accelerated weight drop for use as a seismic energy source and a method of operation thereof
CN101718180B (en) * 2009-11-17 2012-11-14 中国石油集团长城钻探工程有限公司 Floating hinged rolling reducing expansion cone
CN205479958U (en) * 2016-02-29 2016-08-17 池州恒生科技发展有限公司 Tapered pipeline repairs ware
CN206378605U (en) * 2016-12-08 2017-08-04 中石化石油工程技术服务有限公司 Wave detector lengthens backup arm
CN207905726U (en) * 2017-12-26 2018-09-25 中国石油集团川庆钻探工程有限公司长庆钻井总公司 A kind of cam-type reducing drifting connector
CN208379652U (en) * 2018-06-11 2019-01-15 武汉港湾工程质量检测有限公司 The device of Rock And Soil detection of grouting effects

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