CN112859155A

CN112859155A - Seismic detector

Info

Publication number: CN112859155A
Application number: CN202110059857.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-05-28

Abstract

The invention relates to the technical field of seismic survey and discloses a geophone which comprises a shell, wherein an upper cover is fixedly arranged above the shell, voice absorbing coils are fixedly sleeved on the upper and lower parts in the shell, mounting sleeves are fixedly arranged on the upper and lower surfaces of an inner cavity of the shell, a compression spring is fixedly arranged between the inner sleeve and the outer sleeve of the mounting sleeve, a silencing sleeve is movably sleeved on the inner surface of the mounting sleeve, a permanent magnet is fixedly sleeved below the inner cavity of the silencing sleeve, and a mounting shaft is arranged in the middle of the top of the silencing sleeve. This geophone through external wind and wind groove contact, produces great wind sound, and the sound wave produces the vibration with the diaphragm contact, makes the distance rod promote to one side on the amortization cover under the inclined plane guide effect of spout, drives the amortization cover and rotates to one side, turns into mechanical energy with the sound wave, and the sound wave is absorbed by the amortization cover simultaneously, prevents that the sound wave from causing the influence to spring leaf and coil to guarantee the detection precision of equipment.

Description

Seismic detector

Technical Field

The invention relates to the technical field of seismic surveying, in particular to a geophone.

Background

The geophone is an electromechanical conversion device for converting seismic waves transmitted to the ground or in water into electric signals, and is a key part for field data acquisition of a seismometer.

At present, the seismic exploration equipment commonly used in the field of oil and gas exploration is a moving coil velocity detector, a moving coil is fixed on a spring coaxial with a magnet, the spring and the coil move relative to the magnet through external vibration, induced electromotive force is generated by the coil, the magnitude of the induced electromotive force is in direct proportion to the relative movement velocity of the magnet, and the velocity change rule of an analog signal output by the coil is consistent with the velocity change rule of ground mechanical vibration.

In seismic exploration operation, longitudinal waves and transverse waves exist in a work area at the same time, the longitudinal waves enable a detector to vibrate axially, the transverse waves enable the detector to vibrate transversely, the axial direction of the detector is the normal working direction, generally, the longitudinal waves are measured only by the axial vibration response characteristics of the detector, but the structure of a moving-coil detector determines that the moving-coil detector is also responsive to the transverse vibration, a spring wire of a spring piece is twisted in the axial direction, a coil generates an obvious axial motion component, and the response of the detector to the actual axial vibration is seriously disturbed.

Disclosure of Invention

The invention provides a seismic detector which has the advantage of more accurate seismic wave exploration and solves the problem that the detection precision of the detector is influenced by transverse vibration.

The invention provides the following technical scheme: a geophone comprises a shell, an upper cover is fixedly arranged above the shell, voice absorbing coils are fixedly sleeved on the upper and lower parts in the shell, mounting sleeves are fixedly arranged on the upper and lower surfaces of an inner cavity of the shell, a compression spring is fixedly arranged between the inner sleeve and the outer sleeve of the mounting sleeve, a silencing sleeve is movably sleeved on the inner surface of the mounting sleeve, a permanent magnet is fixedly sleeved below the inner cavity of the silencing sleeve, a mounting shaft is arranged in the middle of the top of the silencing sleeve, a spring leaf is fixedly arranged at the bottom of the mounting shaft, a coil is fixedly arranged below the spring leaf, a plug is sleeved at the bottom of the silencing sleeve, an air duct is arranged in the middle of the outer surface of the shell, a sliding groove is arranged on the inner surface of the shell, a diaphragm is fixedly arranged on the inner surface of the shell, and a thrust rod is fixedly arranged on one side of the sliding plate and is in contact with the outer surface of the silencing sleeve.

Preferably, the matching surface of the sliding plate and the sliding chute is an inclined surface.

Preferably, the thickness of one side of the outer ring of the permanent magnet is larger than that of the other side of the outer ring of the permanent magnet, and the plug and the mounting shaft are sleeved with a bearing of the silencing sleeve.

Preferably, the middle part of the diaphragm is sunken towards one side and is slidably mounted with the sliding plate.

The invention has the following beneficial effects:

1. this geophone through external wind and wind groove contact, produces great wind sound, and the sound wave produces the vibration with the diaphragm contact, makes the distance rod promote to one side on the amortization cover under the inclined plane guide effect of spout, drives the amortization cover and rotates to one side, turns into mechanical energy with the sound wave, and the sound wave is absorbed by the amortization cover simultaneously, prevents that the sound wave from causing the influence to spring leaf and coil to guarantee the detection precision of equipment.

2. This geophone, through amortization cover and plug, the cooperation of installation axle, make amortization cover relative installation axle can not reciprocate with the plug, only can rotate, and under the different thickness effect in permanent magnet both sides, receive transverse vibration when the plug, transverse force is used on the amortization cover, under the different weight effect in both sides, and thrust rod drives amortization cover rotation action down, transverse force converts the revolving force of amortization cover into, and then reduce the transverse force that the spring leaf received, guarantee that the spring leaf can not take place transverse distortion, cause the elastic change, lead to the up-and-down movement volume change of coil, the potential energy change that cutting magnetic induction line produced, lead to surveying the change of precision, guarantee the precision of surveying.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic cross-sectional view of the top view of the present invention;

FIG. 3 is a schematic top view of the permanent magnet according to the present invention.

In the figure: 1. a housing; 2. an upper cover; 3. a voice coil; 4. installing a sleeve; 5. a compression spring; 6. a silencing sleeve; 7. a permanent magnet; 8. installing a shaft; 9. a spring plate; 10. a coil; 11. a plug; 12. an air duct; 13. a membrane; 14. a sliding plate; 15. a thrust rod; 16. a chute.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-3, a geophone includes a casing 1, an upper cover 2 is fixedly mounted above the casing 1, voice absorbing coils 3 are fixedly sleeved on upper and lower portions inside the casing 1, mounting sleeves 4 are fixedly mounted on upper and lower surfaces of an inner cavity of the casing 1, a compression spring 5 is fixedly mounted between inner and outer sleeves of the mounting sleeves 4, a silencing sleeve 6 is movably sleeved on an inner surface of the mounting sleeve 4, a permanent magnet 7 is fixedly sleeved below an inner cavity of the silencing sleeve 6, a mounting shaft 8 is disposed at a middle portion of a top portion of the silencing sleeve 6, a spring plate 9 is fixedly mounted at a bottom portion of the mounting shaft 8, a coil 10 is fixedly mounted below the spring plate 9, a plug 11 is sleeved at a bottom portion of the silencing sleeve 6, an air duct 12 is disposed at a middle portion of an outer surface of the casing 1, a sliding groove 16 is disposed on an inner surface of the casing 1, a, a thrust rod 15 is fixedly mounted on one side of the sliding plate 14, and the thrust rod 15 is in contact with the outer surface of the silencing cover 6.

The matching surface of the sliding plate 14 and the sliding groove 16 is an inclined surface, the sliding plate is contacted with the air groove 12 through external air to generate large wind sound, the sound wave is contacted with the diaphragm 13 to generate vibration, the thrust rod 15 is pushed to one side on the silencing sleeve 6 under the guiding action of the sliding groove 16 to drive the silencing sleeve 6 to rotate to one side, the sound wave is converted into mechanical energy, meanwhile, the sound wave is absorbed by the silencing sleeve 6 to prevent the sound wave from influencing the spring piece 9 and the coil 10, and therefore the detection precision of the equipment is guaranteed.

Wherein, the great opposite side of outer lane one side thickness of permanent magnet 7, plug 11 and

installation axle

8 and 6 bearing housing of amortization cover, through amortization cover 6 and plug 11, installation axle 8's cooperation, make 6 relative installation axles of amortization cover 8 and plug 11 can not reciprocate, only can rotate, and under the different thickness effect in permanent magnet 7 both sides, receive transverse vibration when plug 11, transverse force is used on amortization cover 6, under the different weight effect in both sides, and thrust bar 15 drives amortization cover 6 under the rotary action, transverse force converts the revolving force of amortization cover 6 into, and then reduce the transverse force that spring leaf 9 received, guarantee that spring leaf 9 can not take place transverse distortion, cause the elastic change, the up-and-down movement volume that leads to coil 10 changes, the potential energy change that the cutting magnetic induction line produced, lead to the change of precision, guarantee the precision of.

Wherein, diaphragm 13 middle part is sunken to one side, with sliding plate 14 slidable mounting, setting through diaphragm 13, make the sound wave that wind groove 12 produced gather in the middle part of diaphragm 13 greatly, the middle part vibrations of diaphragm 13 are undulant big, it is rotatory to promote amortization cover 6, turn into mechanical energy with the sound wave, weaken the influence to spring leaf 9 and coil 10, just can not be cared about the vibrations power that amortization cover 6 received that direction after amortization cover 6 rotates simultaneously, permanent magnet 7's different weight can both turn into the turning force with the transverse force, and then improve equipment's survey precision.

The working principle of the base detector is as follows:

insert the ground that needs detected with plug 11, external wind and wind groove 12 work, produce stronger sound wave, act on diaphragm 13, turn into mechanical energy with the sound wave, mechanical energy's reciprocal vibrations promote amortization cover 6 and rotate, amortization cover 6 inhales the sound material simultaneously, absorb unnecessary sound wave, when plug 11 receives seismic wave's transverse wave simultaneously, amortization cover 6 receives horizontal pendulum power, permanent magnet 7's both sides weight is different, receive behind the pendulum power, and it is rotatory under the acoustic wave effect, the swinging force that amortization cover 6 received, turn into the revolving force, amortization cover 6 receives vertical seismic wave, coil 10 cutting magnetic induction line, survey seismic wave.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A geophone comprising a housing (1), characterized in that: the voice coil loudspeaker is characterized in that an upper cover (2) is fixedly mounted above the shell (1), a voice coil (3) is mounted in the shell (1) through an upper fixing sleeve and a lower fixing sleeve, an installation sleeve (4) is fixedly mounted on the upper surface and the lower surface of an inner cavity of the shell (1), a compression spring (5) is fixedly mounted between the inner sleeve and the outer sleeve of the installation sleeve (4), a silencing sleeve (6) is movably sleeved on the inner surface of the installation sleeve (4), a permanent magnet (7) is fixedly mounted below the inner cavity of the silencing sleeve (6), an installation shaft (8) is arranged in the middle of the top of the silencing sleeve (6), a spring piece (9) is fixedly mounted at the bottom of the installation shaft (8), a coil (10) is fixedly mounted below the spring piece (9), a plug (11) is sleeved at the bottom of the silencing sleeve (6), an air duct (12) is arranged in the middle of the outer, the inner surface of the shell (1) is fixedly provided with a diaphragm (13) in a matching mode with the sliding groove (16), one side of the middle of the diaphragm (13) is provided with a sliding plate (14) in a sliding mode, one side of the sliding plate (14) is fixedly provided with a thrust rod (15), and the thrust rod (15) is in contact with the outer surface of the silencing sleeve (6).

2. A geophone in accordance with claim 1, wherein: the matching surface of the sliding plate (14) and the sliding groove (16) is an inclined surface.

3. A geophone in accordance with claim 1, wherein: the thickness of one side of the outer ring of the permanent magnet (7) is larger than that of the other side of the outer ring of the permanent magnet, and the plug (11) and the mounting shaft (8) are sleeved with the silencing sleeve (6) through a bearing.

4. A geophone in accordance with claim 1, wherein: the middle part of the diaphragm (13) is sunken towards one side and is installed with the sliding plate (14) in a sliding mode.