CN104280763A - Shear wave source device for seismic exploration - Google Patents
Shear wave source device for seismic exploration Download PDFInfo
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- CN104280763A CN104280763A CN201410569179.2A CN201410569179A CN104280763A CN 104280763 A CN104280763 A CN 104280763A CN 201410569179 A CN201410569179 A CN 201410569179A CN 104280763 A CN104280763 A CN 104280763A
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- gearing
- shear wave
- lifting column
- bearing
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Abstract
The invention relates to a shear wave source device for a seismic exploration which comprises an extensible vibrator, a transmission device, a ball bearing, a surface bearing, a lifting column of adjustable pressure and a control device, wherein the extensible vibrator is used for generating mechanical excitation force parallel to the ground and conducting shear wave exploration; the transmission device transmits the excitation force generated by the extensible vibrator to a cutting board through a contact element; the ball bearing is used for conducting shifting in the excitation direction and acting on the mechanical bias voltage preset of the transmission device; a seismic source device is made to surround the center axis of the surface bearing to rotate so as to excite the shear wave in different directions; the lifting column moves upwards and downwards in the vertical direction of a conduit of the lifting column, the preset pressure is applied by adjusting the lifting column; the control device is connected with the extensible vibrator and a shake sensor arranged on the transmission device and used for detecting the accelerated speed of the transmission device through the shake sensor and controlling and driving the extensible vibrator to conduct shake excitation. The shear wave source device can generate shear waves through shake excitation and is used for shear wave seismic exploration.
Description
Technical field
The present invention relates to a kind of shear wave source for seismic prospecting, especially a kind of elastic wave of generation that excites is the ground roll of wave of compression and shearing wave form and the shear wave source device of bulk wave.
Background technology
Determined by the distinctive kinematics of shear wave and dynamic characteristic, its for produce be furnished with gravel pebble bed and the Quaternary period natural gas pool bad ground there is higher resolution and penetration power, often be applied in Engineering seismic prospeCting, can reflect that the geological geophysical in exploration place characterizes preferably.The conventional focus gun, vibroseis, manpower focus etc. used cuts both ways, as focus gun excitation energy is large, but dangerous and environment for use is restricted; Vibroseis work safety, but cost is high and be not suitable for buildings or structures dense city; Manpower focus is easy-to-use, but excitation energy is little and Energy transmission unstable; Etc..
Summary of the invention
The object of the invention is: the deficiency existed for explosive source, vibroseis, air gun source, sparker source, manpower focus etc., a kind of light, portable, shear wave source device safe and simple to operate, easy to use are provided, implement the Engineering seismic prospeCting of high resolving power, strong penetrating power.
Realize above-mentioned purpose, the technical solution used in the present invention is: a kind of shear wave source device for seismic prospecting, has one and places on the ground, for the chopping block of seismic prospecting, it is characterized in that, comprising:
A flexible oscillator, is placed in above gearing, for generation of the mechanical exciting force parallel with surface of stratum, carries out shear wave exploration;
A gearing, is passed on chopping block by contact element by the exciting force that flexible oscillator produces;
A ball bearing, is arranged between flexible oscillator and gearing, at excitation orientation superior displacement and to serve as the mechanical type bias voltage of gearing preset;
A surface bearing, is arranged between lifting column conduit and top board, seismic source apparatus is rotated around surface bearing central axis, excites shear wave at different directions;
The lifting column that a pressure can regulate, lifting column connects fulcrum arrangement and flexible oscillator, and lifting column moves up and down along lifting column conduit vertical direction, applies bias pressure by regulating lifting column;
A control device, the vibration transducer connecting flexible oscillator and be placed on gearing, (for being detected the acceleration of gearing by vibration transducer, controlling to drive flexible oscillator exciting).
Contact element is connected on gearing with on chopping block by set bolt.Flexible oscillator comprises a housing and one can driving head, and can be fixed on housing by driving head, flexible oscillator be arranged in housing, and housing can move along ball bearing sense of displacement, and flexible oscillator applies exciting force by passing on gearing by driving head.
Four angles of fulcrum arrangement respectively configure a displacement bearing, displacement bearing is inlayed and is arranged in fulcrum arrangement top board fluting, displacement bearing bottom contacts with bearing column, and the vibration force decoupling zero of bearing column is in the position of center line of displacement bearing, gearing is moved along displacement bearing sense of displacement by fulcrum arrangement, and makes fulcrum arrangement and gearing vibration uncoupling.
Flexible its concussion mode of oscillator is fluid pressure type or vapour-pressure type or electromagnetic type.Control device exports the sinusoidal signal of variable frequency to flexible oscillator, and its frequency range is 100Hz ~ 8kHz.
Beneficial effect of the present invention: the present invention produces a pulse excitation power by flexible oscillator.Gearing is connected with the shell one end being provided with flexible oscillator, by means of the chopping block being attached with single or multiple contact element, exciting force is passed to stratum.Focus is provided with the rotatable base of surface bearing and flexible oscillator produces the method that exciting force excites shearing wave.Focus can produce shearing wave by exciting, explores for shear wave earthquake.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described with enforcement.
As shown in Figure 1, a kind of shear wave source device for seismic prospecting, comprise: hanger flange 1, top board 2, surface bearing 3, lifting column guide pipe 4, oil top lock pin 5, flexible oil top 6, lifting column 7, oil pipe 8, oil top support lugn 9, lifting column flange 10, interior hexagonal set bolt 11, fixedly have strong market potential 12, control device 13, signal cable 14, bearing column 15, vibration transducer 16, chopping block 17, fulcrum arrangement 18, gearing 19, contact element 20, set bolt 21, displacement bearing 22, flexible oscillator 23, ball bearing 24, ground 25, can driving head 26, housing 27.
Hanger flange 1 is welded on above top board 2, and in the middle of hanger flange 1, processing through hole, can combine with external mobile devices.Surface bearing 3 top connects top board 2, and bottom connects lifting column guide pipe 4.Oil pipe 8 one end is connected with external hydraulic system, and oil pipe 8 other end pushes up 6 with flexible oil and is connected, and can provide power for flexible oil top 6.Oil top support lugn 9, is welded on lifting column guide pipe 4 both sides, and oil top support lugn 9 opens hole, and oil top lock pin, through oil top support lug 9 through hole, connects 6 tops, oil top.6 tops, oil top are pushed up support lug 9 with oil and are connected, and are fixed by oil top lock pin 5.6 bottoms, oil top are connected with lifting column flange 10.Lifting column flange 10 is welded on lifting column 7 both sides, and lifting column 7 top is inserted in lifting column guide pipe 4, and lifting column 7 bottom is welded with fulcrum arrangement 18.Fulcrum arrangement 18 top board is slotted, and displacement bearing 22 is inlayed and is arranged in fulcrum arrangement 18 top board fluting, and displacement bearing 22 bottom contacts with bearing column 15.It is inner that flexible oscillator 23 is arranged on housing 27.Housing 27 one end with can weld by driving head 26, can be connected on gearing 19 by driving head 26, fix with interior hexagonal set bolt 11.Gathering sill left by gearing 19, and ball bearing 24 is arranged in gathering sill, and the top of ball bearing 24 contacts with housing 27.Contact element 20 is by bolt 21, and be fixed on contact element top on gearing 19, bottom is fixed on chopping block 17, promotes chopping block 17 and inspires shear wave.Displacement bearing 22 is arranged in fulcrum arrangement 18, and oil top 6 moves up and down, and lifting column 7 bias pressure can be made to be applied on gearing 19.Fulcrum arrangement 18 transmits bias pressure by displacement bearing 22, and determines sense of displacement to bearing 22.Described gearing 19 centre position, the housing 27 that center is installed.
Fixedly have strong market potential 12 through fulcrum arrangement 18 intermediate throughholes, 12 upper ends of fixedly having strong market potential connect fulcrum arrangement 18, and 12 lower end threads of fixedly having strong market potential are connected with bearing column 15.Bearing column 15 is welded on gearing 19.Displacement bearing 22 effect is: the vibration uncoupling between fulcrum arrangement 18 and gearing 19, and due to the vibration that oscillator 23 produces, by displacement bearing 22 vibration uncoupling, vibration can not be transmitted fulcrum arrangement 18 and be synchronized them and vibrate.A flexible oscillator 23 is held between fulcrum arrangement 18 and gearing 19.The direction of motion of flexible oscillator 23 determines direction of vibration.Flexible oscillator 23 is arranged in housing 27, can weld with housing 27 driving head 26 one end, can be installed on gearing 19 together with longitudinal adjustable component of its inside by driving head 26 other end, fix with interior hexagonal set bolt 11, flexible oscillator 23 external shell 27 of generation vibration force is moved along level of vibration direction.Fulcrum arrangement 18 is configured with a length-adjustable lifting column 7, provides prebias voltage by regulating lifting column 7 length.Preset bias pressure transmits contact element 20 by fulcrum arrangement 18 through displacement bearing 22 and gearing 19, and final prebias voltage acts on chopping block 17.Described foundation preloads the flexible oil top 6 of pressue device, is controlled by extrinsic power.Lifting oil top 6 can be hydraulic pressure, also can be air pressure.Air pressure be specially adapted to open terrain, oil pressure can produce extremely strong power.The flexible oil top 6 of described pressue device, is also connected to extrinsic power control module, makes bias pressure adjustable.Slotting in gearing 19 one end, with mosaic mode, is provided with vibration transducer 16, to detect direction of vibration and the vibration force size of flexible oscillator 23.Flexible oscillator 23 is connected to control device 13 by signal cable 14.Vibration transducer 16 is connected to control device 13 by signal cable 14.Control device 13 controls flexible oscillator 23, produces the vibration of controllable frequency and amplitude.The state variable vibrated determined by vibration transducer 16, makes the requirement of vibration control variable As soon as possible Promising Policy exciting.Flexible oscillator 23 drives by the periodic vibration with variable frequency, and frequency range is 100Hz ~ 8kHz.This makes to carry out with different frequencies in seismic prospecting.The frequency characteristic of detected object is different, and the transmission of ripple is different.The adjustable amplitude joint of vibration, vibration machine has adjustable amplitude.The vibration generating material of flexible oscillator 23 is realized by high excitation frequency, also can adopt piezoelectric type, electromagnetic type, fluid pressure type, vapour-pressure type vibration machine.Wherein, the very high frequency of piezoelectric type oscillator generation; Fluid pressure type or vapour-pressure type oscillation force are comparatively large, but can not control to excite frequency spectrum, are only a kind of impulsive forces.Electromagnetic vibration generator can be made up of accelerating coil and oscillator body coil, produces Lorentz force as exciting force according to the interaction in magnetic field between hot-wire coil; Also can adopt the contactless electromagnetic launch system of multistage acceleration, oscillator body forms exciting force by the effect of high-intensity magnetic field power in the magnetic field that square coil produces.Certainly, more utilize electromagnetic field principle to produce the electromagnetic type of exciting force in addition to stretch oscillator.Vibration machine has at least 1kW peak power and the maximum output of 2kW.High-powerly can cause the exciting force that focus is large.Flexible oscillator 23 is arranged in housing 27, and the welding of housing 27 one end can driving head 26, and can be connected on gearing 19 in driving head 26 one end, fix with interior hexagonal set bolt 11, housing 27 other end presses close to ball bearing 24, can move freely along direction of vibration.The fulcrum arrangement 18 of focus is rotatable.In gearing 19 flexible oscillator 22 vibration machine and coupling element can in space different direction of vibration exciting shearing wave.The rotation of fulcrum arrangement 18 can be used external force and be realized, and centered by surface bearing 3, axle rotates.Focus can rotate by means of the axis of external force around vertical ground.
Seismic source apparatus is provided with flexible oscillator 23, and the direction of vibration of flexible oscillator 23 is parallel with ground 25.The tangential force that focus exciting causes acts on ground 25 and produces shear wave.Flexible oscillator 23 comprise a housing 27 and one can driving head 26.Can be weldingly fixed on housing 27 by driving head 26, flexible oscillator 23 be arranged in housing 27, is provided with ball bearing 24 between housing 27 and gearing 19.
When flexible oscillator 23 works, by can gearing 19 be made to be excited to be parallel to ground 25 along flexible oscillator 23 direction of motion vibrate by driving head 26.The vibration force that gearing 19 excites is passed to contact element 20 by set bolt 21.Contact element 20 passes to chopping block 17 exciting ground 25 by set bolt 21.
Four angle configuration displacement bearings 22 of square gearing 19, the displacement of displacement bearing 22 comprises the bearing column 15 arranged placed in the middle, and during work, produced the specified output of 1kW under 100Hz ~ 8kHz frequency by flexible oscillator 23, design bias pressure is 20kN.
The initial position of gearing 19 and contact element 20 depends on fulcrum arrangement 18.Remain static when flexible oscillator 23 and apply external force along fulcrum arrangement 18 vertical direction, when flexible oscillator 23 moves in the horizontal direction, gearing 19 produces pushing force.The elastic displacement integral rigidity of displacement bearing 22 is about 1.8kN/mm in the horizontal direction
2, in vertical direction at least large 10 times.
The flexible eccentric moment produced between oscillator 23 and contact element 20 acts on displacement bearing 22, and the power that the heeling moment of displacement bearing 22 periodic shift change produces is very little in vertical direction.
Lifting column flange 10 is welded with outside the lifting column 7 of xsect circle, lifting column 7 lower end is welded on fulcrum arrangement 18, lifting column 7 upper end is inserted in lifting column conduit 4, the lifting column conduit 4 of xsect circle, and diameter is greater than and holds lifting column 7, flexible 6 two, oil top, be arranged on the support lugn 9 of oil top, by oil pipe 8, transmit extrinsic power, realizing traction lifting column 7 to move up and down, applying bias pressure by regulating lifting column 7.
Lifting column 7 moves up and down along lifting column conduit 4 vertical direction.Lifting column 7 both sides are welded with the flexible oil top 6 of lifting column flange 10, two and are connected with lifting column flange 10, and two flexible oil top 6 lifting column conduits 4 connect.By oil pipe 8, transmit extrinsic power, can force to control lifting column 7, and pressure can regulate.When shortening lifting column 7, chopping block 17 lifts from ground.
After chopping block 17 departs from ground 25, focus entirety can rotate by axis centered by surface bearing 3.After focus is rotated in place, chopping block 17 can be again made to be placed on ground 25.After exciting, produce shearing wave on stratum 25.Focus upper end have in four hanger flange 1(Fig. 1 only demonstrate two flanges 1).Four hanger flange can with extraneous moving vehicle or other devices, form a complete set of use.
Flexible oscillator 23 is controlled by control device 13.Control device 13 exports the sinusoidal signal of variable frequency to flexible oscillator 23, frequency range 100Hz ~ 8kHz.Vibration transducer 16 detects the acceleration of gearing 19, and the data that vibration transducer 16 detects by control device 13 and predetermined flexible oscillator 23 acceleration signal (DEF) compare.When control device 13 determines acceleration not for a certain predetermined acceleration signal (DEF), control device 13 drives flexible oscillator 23 exciting.
Claims (6)
1., for a shear wave source device for seismic prospecting, there is one and be placed on ground (25), for the chopping block (17) of seismic prospecting, it is characterized in that, comprising:
A flexible oscillator (23), is placed in above gearing (19), for generation of mechanical exciting force parallel to the ground, carries out shear wave exploration;
A gearing (19), is passed on chopping block (17) by contact element (20) by the exciting force that the oscillator that stretches (23) produces;
A ball bearing (24), is arranged between flexible oscillator (23) and gearing (19), at excitation orientation superior displacement and to serve as the mechanical type bias voltage of gearing (19) preset;
A surface bearing (3), is arranged between lifting column conduit (4) and top board (2), seismic source apparatus is rotated around surface bearing (3) central axis, excites shear wave at different directions;
The lifting column (7) that a pressure can regulate, lifting column (7) connects fulcrum arrangement (18) and flexible oscillator (23), and lifting column (7) moves up and down along lifting column conduit (4) vertical direction, applies bias pressure by regulating lifting column (7);
A control device (13), the vibration transducer (16) connecting flexible oscillator (23) and be placed on gearing (19), for being detected the acceleration of gearing (19) by vibration transducer (16), controls to drive flexible oscillator (23) exciting.
2. the shear wave source device for seismic prospecting according to claim 1, is characterized in that: described contact element (20) is connected on gearing (19) and on chopping block (17) by set bolt (21).
3. the shear wave source device for seismic prospecting according to claim 1, it is characterized in that: described flexible oscillator (23) comprises a housing (27) and one can driving head (26), can be fixed on housing (27) by driving head (26), flexible oscillator (23) is arranged in housing (27), housing (27) can move along ball bearing (24) sense of displacement, and flexible oscillator (23) applies exciting force by passing on gearing (19) by driving head (26).
4. the shear wave source device for seismic prospecting according to claim 1, it is characterized in that: four angles of described gearing (19) respectively configure a displacement bearing (22), displacement bearing (22) is inlayed and is arranged in fulcrum arrangement (18) top board fluting, displacement bearing (22) bottom contacts with bearing column (15), and the vibration force decoupling zero of bearing column (15) is in the position of center line of displacement bearing (22), gearing (19) is moved along displacement bearing (22) sense of displacement by fulcrum arrangement (18), and make fulcrum arrangement (18) and gearing (19) vibration uncoupling.
5. the shear wave source device for seismic prospecting according to any one of claim 1-4, is characterized in that: described its concussion mode of flexible oscillator (23) is fluid pressure type or vapour-pressure type or electromagnetic type.
6. the shear wave source device for seismic prospecting according to any one of claim 1-4, is characterized in that: described control device (13) exports the sinusoidal signal of variable frequency to flexible oscillator (23), and its frequency range is 100Hz ~ 8kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569179.2A CN104280763A (en) | 2014-10-23 | 2014-10-23 | Shear wave source device for seismic exploration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569179.2A CN104280763A (en) | 2014-10-23 | 2014-10-23 | Shear wave source device for seismic exploration |
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| CN104280763A true CN104280763A (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410569179.2A Pending CN104280763A (en) | 2014-10-23 | 2014-10-23 | Shear wave source device for seismic exploration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406692A (en) * | 2020-03-16 | 2021-09-17 | 中国石油天然气集团有限公司 | Transverse wave vibration system |
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| US5252785A (en) * | 1992-01-07 | 1993-10-12 | Industrial Vehicles International | Broad band seismic vibrator |
| CN1233384A (en) * | 1996-10-18 | 1999-10-27 | 输入输出公司 | Three-axis seismic vibrator |
| CN2821597Y (en) * | 2005-09-14 | 2006-09-27 | 四川石油管理局 | Transverse wave focus collision device |
| EP1729150A2 (en) * | 2005-05-27 | 2006-12-06 | GeoForschungsZentrum Potsdam | Seismic source and method for creating seismic shear waves |
| CN101435876A (en) * | 2007-11-13 | 2009-05-20 | 上海申丰地质新技术应用研究所有限公司 | Mechanical seismic source |
| CN203012147U (en) * | 2012-10-30 | 2013-06-19 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Portable shear wave source device |
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2014
- 2014-10-23 CN CN201410569179.2A patent/CN104280763A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5000285A (en) * | 1990-02-28 | 1991-03-19 | Atlantic Richfield Company | Apparatus for imparting seismic signals into the earth |
| US5252785A (en) * | 1992-01-07 | 1993-10-12 | Industrial Vehicles International | Broad band seismic vibrator |
| CN1233384A (en) * | 1996-10-18 | 1999-10-27 | 输入输出公司 | Three-axis seismic vibrator |
| EP1729150A2 (en) * | 2005-05-27 | 2006-12-06 | GeoForschungsZentrum Potsdam | Seismic source and method for creating seismic shear waves |
| CN2821597Y (en) * | 2005-09-14 | 2006-09-27 | 四川石油管理局 | Transverse wave focus collision device |
| CN101435876A (en) * | 2007-11-13 | 2009-05-20 | 上海申丰地质新技术应用研究所有限公司 | Mechanical seismic source |
| CN203012147U (en) * | 2012-10-30 | 2013-06-19 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Portable shear wave source device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406692A (en) * | 2020-03-16 | 2021-09-17 | 中国石油天然气集团有限公司 | Transverse wave vibration system |
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Application publication date: 20150114 |