CN111175811A - Ocean bottom seismograph equipment capable of improving signal-to-noise ratio - Google Patents
Ocean bottom seismograph equipment capable of improving signal-to-noise ratio Download PDFInfo
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- CN111175811A CN111175811A CN201911037499.2A CN201911037499A CN111175811A CN 111175811 A CN111175811 A CN 111175811A CN 201911037499 A CN201911037499 A CN 201911037499A CN 111175811 A CN111175811 A CN 111175811A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/186—Hydrophones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/10—Aspects of acoustic signal generation or detection
- G01V2210/14—Signal detection
- G01V2210/142—Receiver location
- G01V2210/1427—Sea bed
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Abstract
The invention discloses ocean bottom seismograph equipment capable of improving a signal-to-noise ratio, and aims to provide ocean bottom seismograph equipment which is stable and reliable in structure and capable of reliably recovering an ocean bottom seismograph and improving the signal-to-noise ratio. It comprises a seismograph; the protection shell is used for protecting the seismograph, and the seismograph is fixedly arranged in the protection shell; a weight reduction anchor; seismograph mounting structure, seismograph mounting structure including set up opening constant head tank up on the ballast anchor, set up in protective housing bottom be used for with constant head tank complex locating piece, set up airtight cavity in the locating piece, set up the electro-magnet in airtight cavity with for the electro-magnet provides the battery of power and inlay the iron plate of establishing in the bottom of constant head tank, the locating piece is inserted and is established in the constant head tank, and locating piece and iron plate closely laminate, electro-magnet and iron plate actuation to make seismograph, protective housing and the inseparable connection of ballast anchor as an organic whole.
Description
Technical Field
The invention relates to ocean bottom seismograph equipment, in particular to ocean bottom seismograph equipment capable of improving signal-to-noise ratio.
Background
Ocean bottom seismographs are seismographs designed for observing micro-vibrations caused by earthquakes and other crust formation events at the ocean floor. Current ocean bottom seismograph equipment generally comprises: the seismograph is used for detecting vibration signals of the seabed stratum, and the buoyancy of the seismograph is larger than the gravity; the protection shell is used for protecting the seismograph, and the seismograph is fixedly arranged in the protection shell; a weight reduction anchor; the wire for connect protecting sheathing and weight anchor, be connected seismograph, protecting sheathing and weight anchor as an organic whole, wire fusing device are used for fusing the wire, when retrieving the seismograph, send the instruction through staff on the ship, make wire fusing device fusing the wire, make the seismograph together come up to the sea with protecting sheathing under the buoyancy effect to the staff salvages and retrieves the seismograph. The existing ocean bottom seismograph equipment has the following defects that firstly, as the protective shell is connected with the ballast anchor through the metal wire, the connection between the protective shell and the ballast anchor is easy to loosen, so that the seismograph is easily interfered by external factors such as ocean bottom water flow and the like, the signal-to-noise ratio is reduced, and the receiving effect of the seismograph on seismic waves is influenced; secondly, because the submarine environment is complicated, the problem that the recovery of the seismograph fails because the metal wire cannot be fused due to the factors such as the self fault of the metal wire fusing device and the command receiving fault easily occurs.
On the other hand, due to the complex submarine topography, even if a submarine seismograph is launched in an area with a relatively flat submarine surface, the bottom surface of the ballast anchor cannot be tightly and stably supported on the sea bottom surface, and the practical situation is that after the submarine seismograph is settled to the seabed, gaps often exist between the bottom surface of the ballast anchor and the sea bottom surface due to the fact that the sea bottom surface is uneven, so that the contact area between the ballast anchor and the sea bottom surface is small, the stability of the ballast anchor fixed on the seabed is poor, the ballast anchor is easily interfered by external factors such as submarine water flow and the like, the signal-to-noise ratio is reduced, and the receiving effect of the seismograph on seismic.
Disclosure of Invention
The invention aims to provide ocean bottom seismograph equipment which is stable and reliable in structure and can reliably recover ocean bottom seismographs and improve the signal-to-noise ratio.
The second objective of the present invention is to provide an ocean bottom seismograph apparatus capable of effectively increasing the contact area between the ballast anchor and the sea bottom surface, and stably fixing the ballast anchor on the ocean bottom, thereby effectively reducing the influence of ocean bottom current on the seismograph, increasing the seismic wave receiving effect of the seismograph, and improving the signal-to-noise ratio.
The technical scheme of the invention is as follows:
an ocean bottom seismograph apparatus for improved signal-to-noise ratio, comprising: the seismograph is used for detecting vibration signals of the seabed stratum, and the buoyancy of the seismograph is larger than the gravity; the protection shell is used for protecting the seismograph, and the seismograph is fixedly arranged in the protection shell; a weight reduction anchor; the earthquake instrument mounting structure comprises a positioning groove, a positioning block, a closed cavity, an electromagnet, a battery and an iron plate, wherein the positioning groove is arranged on the weight anchor and provided with an upward opening, the positioning block is arranged at the bottom of the protective shell and matched with the positioning groove, the closed cavity is arranged in the positioning block, the electromagnet is arranged in the closed cavity, the battery is used for providing a power supply for the electromagnet, and the iron plate is embedded at the bottom of the positioning groove; when the electric quantity of the battery is used up, the electromagnet is powered off, so that the seismograph and the protective shell float upwards together under the buoyancy action of the seismograph.
Pass through the metal wire with the ocean bottom seismograph among the prior art and connect protective housing and weight anchor, it is not hard up to appear protective housing and weight anchor connection easily, make the seismograph receive the interference of external factors such as ocean bottom rivers easily, reduce the signal-to-noise ratio, influence the seismograph and compare to seismic wave's accepting effect, ocean bottom seismograph equipment in this scheme is inserted through the locating piece and is established in the constant head tank, the terminal surface and the iron plate of locating piece closely laminate, and through electro-magnet and iron plate actuation, so that the seismograph, protective housing and the inseparable connection of weight anchor are as an organic whole, its stable in structure is reliable, do not have protective housing and weight anchor to be connected not hard up, receive the interference of external factors such as ocean bottom rivers easily, the problem of reduction signal. On the other hand, compared with the prior art that the metal wire fusing device fuses the metal wire to achieve seismic instrument recovery, and the metal wire cannot be fused due to factors such as the fault of the metal wire fusing device and instruction receiving fault, and accordingly seismic instrument recovery failure is caused, the submarine seismic instrument equipment in the scheme is attracted to the iron plate through the electromagnet to enable the seismic instrument, the protective shell and the ballast anchor to be tightly connected into a whole, when the electric quantity of the battery is used up, the electromagnet is powered off, so that the seismic instrument and the protective shell float up together under the buoyancy action of the seismic instrument, seismic instrument recovery is achieved, the submarine seismic instrument can be reliably recovered, and the problem that the metal wire cannot be fused due to the factors such as the fault of the metal wire fusing device and instruction receiving fault and accordingly seismic instrument recovery failure is caused is avoided.
Preferably, an annular cover plate extending outwards is arranged on the outer side face of the positioning block and located above the positioning groove to cover the positioning groove. So, can effectively avoid foreign matter such as deposit, fall into the gap between the lateral wall of constant head tank and the locating hole by the notch of constant head tank to make the electric quantity of battery use up, the electro-magnet outage back, seismometer and protective housing can float up smoothly under the buoyancy of seismometer, realize that the seismometer retrieves.
Preferably, the ballast anchor includes the base and sets up the installation boss at base upper surface middle part, the constant head tank sets up on the top surface of installation boss, the edge of annular apron is equipped with the annular cover body that down extends the formation, it is internal that the annular cover is stretched into at the top of installation boss. So, can further avoid foreign matter such as deposit, fall into the gap between the lateral wall of constant head tank and the locating hole to make the electric quantity of battery use up, the electro-magnet outage back, seismometer and protective housing can be under the buoyancy of seismometer the smooth come-up, realize that the seismometer retrieves.
Preferably, the protection shell comprises a hemispherical lower shell and a hemispherical upper shell, the lower shell is connected with the upper shell through a flange, and the seismograph is fixed in the lower shell and the upper shell.
Preferably, the device further comprises a gap filling device, wherein the gap filling device is filled with uniformly-stirred concrete, the gap filling device is arranged on the ballast anchor, and after the ballast anchor is sunk to the seabed, the uniformly-stirred concrete in the gap filling device is extruded into a gap between the ballast anchor and the seabed surface and is used for filling the gap between the ballast anchor and the seabed surface so as to improve the contact area between the ballast anchor and the seabed surface and stably fix the ballast anchor on the seabed. Therefore, on one hand, the effective contact area between the ballast anchor and the sea bottom surface can be effectively increased, and the seismic wave receiving effect of the seismograph is increased, so that the signal to noise ratio is improved; on the other hand, the gap between the ballast anchor and the sea bottom surface is filled with the concrete which is uniformly mixed, and the ballast anchor and the sea bottom surface can be connected through the concrete after the concrete is solidified, so that the ballast anchor is stably and reliably fixed on the sea bottom, the interference of external factors such as sea bottom water flow and the like on the seismograph is effectively reduced, the quality of data acquired by the seismograph can be improved, and the signal to noise ratio is improved.
Preferably, the gap filling device comprises a vertical cylinder fixed on the ballast anchor, an extrusion piston arranged in the vertical cylinder in a sliding manner, a compression spring positioned between the extrusion piston and the inner top surface of the vertical cylinder, a filling port arranged at the lower part of the outer side surface of the vertical cylinder, a lower end cover used for sealing the filling port, an exhaust port arranged on the upper end surface of the vertical cylinder, an upper end cover used for sealing the exhaust port, a lower valve sleeve arranged on the lower end surface of the vertical cylinder, a valve core column limiting block arranged on the inner wall of the lower valve sleeve, an upper valve sleeve arranged on the upper end surface of the vertical cylinder, a valve core column through hole arranged on the extrusion piston, a valve core column matched with the lower valve sleeve and the upper valve sleeve, and a trigger rod connected with the lower end of the valve core column, wherein the uniformly-stirred concrete is filled into the vertical cylinder from the filling port, the upper valve sleeve, the lower valve sleeve and the valve core column via hole are coaxially distributed, an air guide groove extending up and down is formed in the upper portion of the outer side face of the valve core column, the valve core column penetrates through the valve core column via hole, the lower end of the valve core column extends into the lower valve sleeve, the upper end of the valve core column penetrates through the upper valve sleeve, the valve core column is connected with the lower valve sleeve in a sliding and sealing mode, the valve core column is connected with the upper valve sleeve in a sliding and sealing mode, a vertical through hole is formed in the weight-reducing anchor, the lower valve sleeve extends into the vertical through hole, the valve core column limiting block is located below the valve core column, when the lower end of the valve core column extends into the lower valve sleeve and abuts against the valve core column limiting block, the lower end of the trigger rod penetrates through the vertical through hole and is located below the weight-reducing anchor, the air guide groove is located in the vertical.
The gap filling device of this scheme is when the ballast anchor is close to the seabed, the lower extreme of trigger bar will earlier with the seabed contact, afterwards, continue to sink at the ballast anchor and subside the in-process at the seabed, the trigger bar will drive the case post and shift up, make the lower extreme of valve stem post shift up in vertical cylinder body, after the lower extreme of valve stem post shifts up in vertical cylinder body, the air guide groove communicates the external inner chamber with vertical cylinder body, at this moment, extrude the piston and will down move under compression spring's effect, extrude the even concrete of stirring in the vertical cylinder body by lower valve housing to in the lower port through vertical through-hole impresses the even concrete of stirring in the gap between ballast anchor and the seabed surface, be used for filling the gap between ballast anchor and the seabed surface, in order to improve the area of contact of ballast anchor and seabed surface, and make stable the fixing in the seabed of ballast anchor.
Preferably, the upper limiting block used for limiting the extrusion piston is arranged on the upper portion of the inner wall of the vertical cylinder body, and the extrusion piston is located below the upper limiting block.
Preferably, the lower limiting block used for limiting the extrusion piston is arranged on the lower portion of the inner wall of the vertical cylinder body, the extrusion piston is located above the lower limiting block, and the injection port is located below the lower limiting block.
Preferably, a middle sealing ring is arranged between the valve stem and the valve core post through hole, and the middle sealing ring is fixed on the inner wall of the valve stem through hole.
The invention has the beneficial effects that:
one of them, pass through the metal wire with the ocean bottom seismograph among the prior art and connect protective housing and weight anchor, it is not hard up to appear protective housing and weight anchor connection easily, make the seismograph receive the interference of external factors such as ocean bottom rivers easily, reduce the signal-to-noise ratio, influence the seismograph and compare to seismic wave's receiving effect, ocean bottom seismograph equipment in this scheme is inserted through the locating piece and is established in the constant head tank, the terminal surface and the iron plate of locating piece closely laminate, and through electro-magnet and iron plate actuation, so that the seismograph, protective housing and weight anchor inseparable be connected as an organic whole, its stable in structure is reliable, it is not hard up to have protective housing and weight anchor connection, easily receive the interference of external factors such as ocean bottom rivers, the problem of signal-to. On the other hand, compared with the prior art that the metal wire fusing device fuses the metal wire to achieve seismic instrument recovery, and the metal wire cannot be fused due to factors such as the fault of the metal wire fusing device and instruction receiving fault, and accordingly seismic instrument recovery failure is caused, the submarine seismic instrument equipment in the scheme is attracted to the iron plate through the electromagnet to enable the seismic instrument, the protective shell and the ballast anchor to be tightly connected into a whole, when the electric quantity of the battery is used up, the electromagnet is powered off, so that the seismic instrument and the protective shell float up together under the buoyancy action of the seismic instrument, seismic instrument recovery is achieved, the submarine seismic instrument can be reliably recovered, and the problem that the metal wire cannot be fused due to the factors such as the fault of the metal wire fusing device and instruction receiving fault and accordingly seismic instrument recovery failure is caused is avoided.
Secondly, after the ballast anchor sinks to the seabed, the uniformly-mixed concrete in the gap filling device is extruded into the gap between the ballast anchor and the seabed surface and is used for filling the gap between the ballast anchor and the seabed surface so as to improve the contact area between the ballast anchor and the seabed surface and stably fix the ballast anchor on the seabed. Therefore, on one hand, the effective contact area between the ballast anchor and the sea bottom surface can be effectively increased, the seismic wave receiving effect of the seismograph is increased, and the signal to noise ratio is improved; on the other hand, the gap between the ballast anchor and the sea bottom surface is filled with the concrete which is uniformly mixed, and the ballast anchor and the sea bottom surface can be connected through the concrete after the concrete is solidified, so that the ballast anchor is stably and reliably fixed on the sea bottom, the interference of external factors such as sea bottom water flow and the like on the seismograph is effectively reduced, the quality of data acquired by the seismograph can be improved, and the signal to noise ratio is improved.
Drawings
FIG. 1 is a schematic diagram of one configuration of the ocean bottom seismograph apparatus of the present invention that provides improved signal-to-noise ratio.
Fig. 2 is a partially enlarged view of a point a in fig. 1.
FIG. 3 is a schematic diagram of the structure of the ocean bottom seismograph equipment of the present invention after settling to the ocean bottom to improve signal-to-noise ratio.
In the figure:
the device comprises a ballast anchor 1, a base 1.1, a mounting boss 1.2 and a vertical through hole 1.3;
the device comprises a gap filling device 2, concrete 2.0, a vertical cylinder body 2.1, an extrusion piston 2.2, a compression spring 2.3, a lower valve sleeve 2.4, a valve core column limiting block 2.5, an upper valve sleeve 2.6, an upper sealing ring 2.7, a valve core column 2.8, an injection port 2.9, a lower end cover 2.10, an exhaust port 2.11, an upper end cover 2.12, an upper limiting block 2.13, a valve core column through hole 2.14, a middle sealing ring 2.15, a lower sealing ring 2.16, a lower limiting block 2.17, a trigger rod 2.18 and an air guide groove 2.19;
a seismograph 3;
a protective shell 4, a lower shell 4.1 and an upper shell 4.2;
the earthquake instrument comprises a seismograph mounting structure 5, a positioning groove 5.1, a positioning block 5.2, an electromagnet 5.3, an iron plate 5.4, an annular cover plate 5.5 and an annular cover body 5.6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; 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.
The first embodiment is as follows: as shown in FIG. 1, the ocean bottom seismograph equipment capable of improving the signal-to-noise ratio comprises a seismograph 3, a protective shell 4, a ballast anchor 1 and a seismograph mounting structure 5. The seismograph is used for detecting vibration signals of the seabed stratum, and the buoyancy of the seismograph is larger than the gravity. The protective shell is used for protecting the seismograph. The seismograph is fixedly arranged in the protective shell. Seismograph mounting structure 5 is including setting up the opening constant head tank 5.1 up on the ballast anchor, set up in protective housing bottom be used for with constant head tank complex locating piece 5.2, set up airtight cavity in the locating piece, set up electro-magnet 5.3 in airtight cavity, set up in airtight cavity for the battery of electro-magnet power supply and inlay iron plate 5.4 of establishing in the bottom of constant head tank. The locating piece is inserted and is established in the constant head tank, and the locating piece closely laminates with iron plate, specifically, the lower terminal surface of locating piece closely laminates with the tight upper surface of iron plate. The electromagnet is attracted with the iron plate so that the seismograph, the protective shell and the ballast anchor are tightly connected into a whole. When the electric quantity of the battery is used up, the electromagnet is powered off, so that the seismograph and the protective shell float upwards together under the buoyancy action of the seismograph.
Pass through the metal wire with the ocean bottom seismograph among the prior art and connect protective housing and weight anchor, it is not hard up to appear protective housing and weight anchor connection easily, make the seismograph receive the interference of external factors such as ocean bottom rivers easily, reduce the signal-to-noise ratio, influence the seismograph and compare to seismic wave's accepting effect, ocean bottom seismograph equipment in this scheme is inserted through the locating piece and is established in the constant head tank, the terminal surface and the iron plate of locating piece closely laminate, and through electro-magnet and iron plate actuation, so that the seismograph, protective housing and the inseparable connection of weight anchor are as an organic whole, its stable in structure is reliable, do not have protective housing and weight anchor to be connected not hard up, receive the interference of external factors such as ocean bottom rivers easily, the problem of reduction signal.
On the other hand, compared with the submarine seismograph in the prior art, the recovery of the seismograph is realized by fusing the metal wire through the metal wire fusing device, the metal wire can not be fused due to the factors of the fault of the metal wire fusing device, the fault of instruction receiving and the like, compared with the problem of failure of seismic detector recovery, the submarine seismic detector equipment in the scheme is attracted with the iron plate through the electromagnet, so that the seismic detector, the protective shell and the ballast anchor are tightly connected into a whole, when the electric quantity of the battery is used up, the electromagnet is powered off, the electromagnet is demagnetized, at the moment, the seismograph and the protective shell float upwards together under the buoyancy action of the seismograph, the recovery of the seismograph is realized, the submarine seismograph can be reliably recovered, and the problem that the recovery of the seismograph fails because the metal wire cannot be fused due to the factors such as the fault of the metal wire fusing device and the fault of instruction receiving does not exist.
Furthermore, as shown in fig. 1, an annular cover plate 5.5 extending outward is disposed on the outer side surface of the positioning block, and the annular cover plate is located above the positioning groove and used for covering the positioning groove. So, can effectively avoid foreign matter such as deposit, fall into the gap between the lateral wall of constant head tank and the locating hole by the notch of constant head tank to make the electric quantity of battery use up, the electro-magnet outage back, seismometer and protective housing can float up smoothly under the buoyancy of seismometer, realize that the seismometer retrieves.
Further, as shown in fig. 1, the ballast anchor comprises a base 1.1 and an installation boss 1.2 arranged in the middle of the upper surface of the base, a positioning groove is arranged on the top surface of the installation boss, an annular cover body 5.6 formed by extending downwards is arranged at the edge of the annular cover plate, and the top of the installation boss extends into the annular cover body. So, can further avoid foreign matter such as deposit, fall into the gap between the lateral wall of constant head tank and the locating hole to make the electric quantity of battery use up, the electro-magnet outage back, seismometer and protective housing can be under the buoyancy of seismometer the smooth come-up, realize that the seismometer retrieves.
Further, as shown in fig. 1, the protective casing 4 includes a hemispherical lower casing 4.1 and a hemispherical upper casing 4.2, the lower casing and the upper casing are connected by a flange, and the seismograph is fixed in the lower casing and the upper casing.
Further, as shown in fig. 1 and 2, the ocean bottom seismograph equipment capable of improving the signal-to-noise ratio further comprises a gap filling device 2. The concrete 2.0 of the even stirring is equipped with in the gap filling device, and the gap filling device sets up on the ballast anchor, and after the ballast anchor sinks to the seabed, the even concrete of stirring in the gap filling device will be extruded in the gap between ballast anchor and the sea bottom surface for fill the gap between ballast anchor and the sea bottom surface, with the area of contact who improves ballast anchor and sea bottom surface, and make stable the fixing in the seabed of ballast anchor. Therefore, on one hand, the effective contact area between the ballast anchor and the sea bottom surface can be effectively increased, the seismic wave receiving effect of the seismograph is increased, and the signal to noise ratio is improved; on the other hand, the gap between the ballast anchor and the sea bottom surface is filled with the concrete which is uniformly mixed, and the ballast anchor and the sea bottom surface can be connected through the concrete after the concrete is solidified, so that the ballast anchor is stably and reliably fixed on the sea bottom, the interference of external factors such as sea bottom water flow and the like on the seismograph is effectively reduced, the quality of data acquired by the seismograph can be improved, and the signal to noise ratio is improved.
Specifically, as shown in fig. 1 and 2, the gap filling device 2 includes a vertical cylinder 2.1 fixed on the ballast anchor, an extrusion piston 2.2 slidably disposed in the vertical cylinder, a compression spring 2.3 located between the extrusion piston and an inner top surface of the vertical cylinder, a filling port 2.9 disposed at a lower portion of an outer side surface of the vertical cylinder, a lower end cap 2.10 for sealing the filling port, an exhaust port 2.11 disposed at an upper end surface of the vertical cylinder, an upper end cap 2.12 for sealing the exhaust port, a lower valve sleeve 2.4 disposed at a lower end surface of the vertical cylinder, a spool stopper 2.5 disposed at an inner wall of the lower valve sleeve, an upper valve sleeve 2.6 disposed at the upper end surface of the vertical cylinder, a spool via hole 2.14 disposed at the extrusion piston, a spool 2.8 engaged with the lower valve sleeve and the upper valve sleeve, and a trigger rod 2.18 connected to a lower end of the spool. In this embodiment, the lower end cap passes through threaded connection with the filling opening, and the upper end cap passes through threaded connection with the gas vent. The axis of the upper valve sleeve is parallel to the axis of the vertical cylinder body. The upper valve sleeve, the lower valve sleeve and the valve core column through hole are coaxially distributed. The outer diameter of the trigger rod is smaller than that of the valve stem.
The upper part of the outer side surface of the valve core column is provided with an air guide groove 2.19 which extends up and down. The valve core column penetrates through the valve core column through hole, in the embodiment, a middle sealing ring 2.15 is arranged between the valve core column and the valve core column through hole, and the middle sealing ring is fixed on the inner wall of the valve core column through hole. The lower end of the valve core column extends into the lower valve sleeve, and the upper end of the valve core column penetrates through the upper valve sleeve. The valve core column is connected with the lower valve sleeve in a sliding and sealing mode, specifically, a lower sealing ring 2.16 is arranged on the inner wall of the lower valve sleeve, and the valve core column is connected with the lower valve sleeve in a sliding and sealing mode through the lower sealing ring. The valve core column is connected with the upper valve sleeve in a sliding and sealing mode, specifically, an upper sealing ring 2.7 is arranged on the inner wall of the upper valve sleeve, and the valve core column is connected with the upper valve sleeve in a sliding and sealing mode through the upper sealing ring. In this embodiment, the inner diameters of the upper valve sleeve and the lower valve sleeve are the same, and the inner diameter of the vertical cylinder body is larger than the outer diameter of the upper valve sleeve.
Be equipped with vertical through-hole 1.3 on the ballast anchor, in this embodiment, vertical through-hole setting is on the base, and vertical through-hole runs through the upper and lower surface of base, and vertical cylinder body is fixed on the upper surface of base. The lower valve sleeve extends into the vertical through hole. The valve stem limiting block is positioned below the valve stem.
As shown in fig. 2, when the lower end of the valve core column extends into the lower valve sleeve and abuts against the valve core column limiting block, the lower end of the trigger rod penetrates through the vertical through hole and is located below the ballast anchor, and the air guide groove is located in the vertical cylinder body.
When the lower extreme of trigger bar shifts up to vertical cylinder body in, the air guide groove communicates the external inner chamber with vertical cylinder body, specifically, when the lower extreme of trigger bar shifts up to vertical cylinder body in, the upper portion in air guide groove is located the top of valve barrel, and the lower part in air guide groove is located the inner chamber of the vertical cylinder body above the extrusion piston to make air guide groove communicate the external inner chamber with vertical cylinder body.
The concrete which is evenly stirred is injected into the vertical cylinder body from the injection opening, and during the concrete operation, the upper end cover is firstly taken down, and the lower end of the valve core column extends into the lower valve sleeve and abuts against the valve core column limiting block; then, injecting the uniformly stirred concrete into the vertical cylinder body through the injection port, namely injecting the uniformly stirred concrete into the vertical cylinder body positioned below the extrusion piston through the injection port before the ocean bottom seismograph equipment is lowered into the sea, so that the extrusion piston moves upwards and further compresses a compression spring in the vertical cylinder body, and then immediately sealing the injection port through the lower end cover; then, the ocean bottom seismograph equipment is lowered into the sea.
As shown in fig. 3, when the ballast anchor is close to the seabed, the lower end of the trigger rod will contact with the seabed first, and then, in the process that the ballast anchor sinks and settles to the seabed, the trigger rod will drive the valve core column to move upwards, so that the lower end of the valve core column moves upwards into the vertical cylinder, and after the lower end of the valve core column moves upwards into the vertical cylinder, the air guide groove communicates with the outside and the inner cavity of the vertical cylinder, at this time, the extrusion piston will move downwards under the action of the compression spring, so as to press out the uniformly stirred concrete in the vertical cylinder from the lower valve sleeve, and press the uniformly stirred concrete into the gap between the ballast anchor and the seabed through the lower port of the vertical through hole, so as to fill the gap between the ballast anchor and the seabed, and after the concrete is solidified, the contact area between the ballast anchor and the seabed can be effectively increased, and the ballast anchor can be stabilized, And the fixing on the seabed is reliable.
Further, as shown in fig. 2, the upper portion of the inner wall of the vertical cylinder is provided with an upper limiting block 2.13 for limiting the extrusion piston, and the extrusion piston is located below the upper limiting block.
The lower limiting block 2.17 used for limiting the extrusion piston is arranged on the lower portion of the inner wall of the vertical cylinder body, the extrusion piston is located above the lower limiting block, and the injection port is located below the lower limiting block.
Further, as shown in fig. 2, a middle sealing ring 2.15 is arranged between the valve core column and the valve core column via hole, and the middle sealing ring is fixed on the inner wall of the valve core column via hole.
Further, the gap filling devices are four, the four gap filling devices are all distributed around the seismograph, and the vertical through holes in the ballast anchor correspond to the gap filling devices one to one.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. An ocean bottom seismograph apparatus for improved signal-to-noise ratio, comprising:
the seismograph is used for detecting vibration signals of the seabed stratum, and the buoyancy of the seismograph is larger than the gravity;
the protection shell is used for protecting the seismograph, and the seismograph is fixedly arranged in the protection shell;
a weight reduction anchor;
it is characterized by also comprising:
the earthquake instrument mounting structure comprises a positioning groove, a positioning block, a closed cavity, an electromagnet, a battery and an iron plate, wherein the positioning groove is arranged on the weight anchor and provided with an upward opening, the positioning block is arranged at the bottom of the protective shell and matched with the positioning groove, the closed cavity is arranged in the positioning block, the electromagnet is arranged in the closed cavity, the battery is used for providing a power supply for the electromagnet, and the iron plate is embedded at the bottom of the positioning groove; when the electric quantity of the battery is used up, the electromagnet is powered off, so that the seismograph and the protective shell float upwards together under the buoyancy action of the seismograph.
2. The marine seismograph apparatus of claim 1, wherein the locating block has an outwardly extending annular cover plate on the outer surface thereof, the annular cover plate being positioned over the locating groove to cover the locating groove.
3. The ocean bottom seismograph equipment capable of improving the signal-to-noise ratio as claimed in claim 2, wherein the ballast anchor comprises a base and a mounting boss arranged in the middle of the upper surface of the base, the positioning groove is arranged on the top surface of the mounting boss, the edge of the annular cover plate is provided with an annular cover body formed by extending downwards, and the top of the mounting boss extends into the annular cover body.
4. The ocean bottom seismograph equipment capable of improving signal-to-noise ratio as claimed in claim 1, 2 or 3, wherein the protective housing comprises a hemispherical lower housing and a hemispherical upper housing, the lower housing and the upper housing are connected through a flange, and the seismograph is fixed in the lower housing and the upper housing.
5. The marine seismograph apparatus of claim 1, 2 or 3, further comprising a gap filling device, wherein the gap filling device contains uniformly mixed concrete, the gap filling device is disposed on the ballast anchor, and when the ballast anchor is lowered to the sea bottom, the uniformly mixed concrete in the gap filling device is extruded into the gap between the ballast anchor and the sea bottom surface to fill the gap between the ballast anchor and the sea bottom surface, so as to increase the contact area between the ballast anchor and the sea bottom surface and stably fix the ballast anchor to the sea bottom.
6. The ocean bottom seismograph equipment capable of improving the signal-to-noise ratio as claimed in claim 5, wherein the gap filling device comprises a vertical cylinder fixed on the ballast anchor, an extrusion piston slidably disposed in the vertical cylinder, a compression spring located between the extrusion piston and the inner top surface of the vertical cylinder, a filling port disposed at the lower part of the outer side surface of the vertical cylinder, a lower end cover for sealing the filling port, an exhaust port disposed on the upper end surface of the vertical cylinder, an upper end cover for sealing the exhaust port, a lower valve sleeve disposed on the lower end surface of the vertical cylinder, a spool post limiting block disposed on the inner wall of the lower valve sleeve, an upper valve sleeve disposed on the upper end surface of the vertical cylinder, a spool post via hole disposed on the extrusion piston, a spool post engaged with the lower valve sleeve and the upper valve sleeve, and a trigger lever connected with the lower end of the spool post, the uniformly-stirred concrete, the axial line of the upper valve sleeve is parallel to the axial line of the vertical cylinder body, the upper valve sleeve, the lower valve sleeve and the valve core column through hole are coaxially distributed, the upper part of the outer side surface of the valve core column is provided with an air guide groove which extends up and down, the valve core column passes through the valve core column through hole, the lower end of the valve core column extends into the lower valve sleeve, the upper end of the valve core column penetrates through the upper valve sleeve, the valve core column is connected with the lower valve sleeve in a sliding and sealing manner, the valve core column is connected with the upper valve sleeve in a sliding and sealing manner, the weight anchor is provided with a vertical through hole, the lower valve sleeve extends into the vertical through hole, the valve core column limiting block is positioned below the valve core column, when the lower end of the valve core column extends into the lower valve sleeve and abuts against the valve core column limiting block, the lower end of the trigger rod penetrates through the vertical through hole and is positioned below the ballast anchor, the air guide groove is positioned in the vertical cylinder body, when the lower end of the trigger rod moves upwards into the vertical cylinder body, the air guide groove is communicated with the outside and the inner cavity of the vertical cylinder body.
7. The marine seismograph apparatus of claim 6 having an improved signal-to-noise ratio wherein the upper portion of the inner wall of said vertical cylinder is provided with an upper stop block for stopping the extrusion piston, said extrusion piston being located below the upper stop block.
8. The marine seismograph apparatus of claim 6 having an improved signal-to-noise ratio wherein a central seal is disposed between the valve stem and the valve stem through hole and the central seal is secured to an inner wall of the valve stem through hole.
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| CN201911037499.2A CN111175811B (en) | 2019-10-29 | 2019-10-29 | Ocean bottom seismograph equipment capable of improving signal-to-noise ratio |
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