CN112099076B

CN112099076B - Spiral penetration type submarine seismograph coupling frame

Info

Publication number: CN112099076B
Application number: CN202011316988.4A
Authority: CN
Inventors: 郭超颖; 刘志国
Original assignee: Shanghai Rainbowfish Ocean Technology Co ltd
Current assignee: Rainbow Fish Technology (Qingdao) Co.,Ltd.
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-02
Anticipated expiration: 2040-11-23
Also published as: CN112099076A

Abstract

The invention belongs to the technical field of marine seismic observation, and particularly relates to a spiral penetration type submarine seismograph decoupling frame. The conventional sinking coupling frame is of a flat plate structure, effective penetration is difficult to realize after the sinking to the seabed, and the coupling with the seabed is not tight enough, so that the observation precision of the seabed seismograph is influenced. To alleviate these problems, the present invention discloses a screw penetration type marine seismograph counter sink coupling frame, comprising: a housing, the housing being cylindrical with a bottom; a flange located at an upper edge of the housing; a plurality of arcuate vanes connected to a sidewall of the housing; a penetration cone connected to the bottom of the shell; and a helical blade connected to the conical surface of the penetration cone; wherein the plurality of arcuate vanes curve radially outward from the sidewall of the housing and in a uniform direction.

Description

Spiral penetration type submarine seismograph coupling frame

Technical Field

The invention relates to the technical field of marine seismic observation, in particular to a spiral penetration type submarine seismograph decoupling frame.

Background

Ocean bottom seismographs are high-precision observers for observing ocean bottom seismic waves, and are generally used in combination with a decoupling frame. When the submarine seismograph is deployed, the whole set of equipment comprising the submarine seismograph and the decoupling frame sinks to the sea bottom by using the gravity provided by the decoupling frame. And when the ocean bottom seismograph is recovered after the observation task is finished, the release device arranged on the ocean bottom seismograph is used for releasing the connection between the ocean bottom seismograph and the decoupling frame. And then the ocean bottom seismograph floats to the sea surface by means of self buoyancy, and recovery is completed. The existing sinking coupling frame is generally of a flat structure, effective penetration is difficult to realize after the sinking coupling frame sinks to the seabed, and the coupling with the seabed is not tight enough, so that the observation precision of the seabed seismograph is influenced.

Aiming at the problems that the conventional ocean bottom seismograph decoupling frame is small in penetration depth and not tightly coupled with the ocean bottom, the improved ocean bottom seismograph decoupling frame is expected to be provided.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

The invention provides a spiral penetration type submarine seismograph sinking coupling frame, which comprises: a housing, the housing being cylindrical with a bottom; a flange located at an upper edge of the housing; a plurality of arcuate vanes connected to a sidewall of the housing; a penetration cone connected to the bottom of the shell; and a helical blade connected to the conical surface of the penetration cone; wherein the plurality of arcuate vanes curve radially outward from the sidewall of the housing and in a uniform direction.

In one embodiment, the plurality of arcuate vanes may be evenly distributed about the sidewall of the housing. Preferably, the plurality of arc-shaped blades may include 8 arc-shaped blades.

In one embodiment, the spiral penetration type marine seismograph decoupling frame can be of an integrated structure, wherein the shell and the flange, the shell and the plurality of arc-shaped blades, the shell and the penetration cone and the spiral blades are connected in a welding mode.

In one embodiment, the side walls and bottom of the housing are welded together, and the inner diameter of the housing may be slightly larger than the outer diameter of the spherical structure of the ocean bottom seismograph.

In one embodiment, the thickness of the flange may be 50 mm.

In one embodiment, the spirally penetrating marine seismograph counter-coupling frame comprises a plurality of groups of spring mounting holes which are uniformly distributed on the upper end surface of the flange in a ring shape.

Preferably, the plurality of sets of spring mounting holes may include 4 sets of spring mounting holes, each set including 3 spring mounting holes.

In one embodiment, each spring mounting hole may be a cylindrical blind hole.

In one embodiment, the screw penetration ocean bottom seismometer decoupling mount further comprises a compression spring loaded into each spring mounting hole, wherein the compression spring is in a compressed state after the ocean bottom seismometer is mounted to the screw penetration ocean bottom seismometer decoupling mount.

In one embodiment, the spirally-penetrating ocean bottom seismograph counter-coupling frame comprises a plurality of hanging points which are uniformly distributed on the lower end face of the flange in an annular shape and are connected with the flange in a welding mode. The plurality of hanging points can be used for hanging and buckling a steel wire rope connected with the ocean bottom seismograph.

Preferably, the plurality of hanging points may include 4 hanging points, and are all cylindrical metal rods.

Further preferably, the distribution positions of the hanging points and the distribution positions of the groups of spring mounting holes can be spaced apart by a certain angle. In embodiments having 4 hang points and 4 sets of spring mounting holes, the distribution of hang points may be spaced 45 apart from the distribution of spring mounting holes of each set.

Preferably, the penetration cone may be a solid structure, and the cone angle of the penetration cone may be 30 °.

In one embodiment, the helical blade may extend helically along the conical surface of the penetration cone and the root of the helical blade may be welded to the conical surface of the penetration cone.

In one embodiment, the direction of the spiral of the helical blade is opposite to the direction of curvature of the arcuate blade. Further, when viewed downward from the top of the spirally penetrating marine seismograph decoupling frame, if the arc-shaped blade is bent in the clockwise direction, the spiral blade rotation line direction is set to be left-handed, and if the arc-shaped blade is bent in the counterclockwise direction, the spiral blade rotation line direction is set to be right-handed.

Preferably, the components of the screw penetration type ocean bottom seismograph decoupling frame can be made of the same metal material (for example, 316 stainless steel material).

The invention also provides a method of deploying and retrieving an ocean bottom seismometer using the aforementioned spirally penetrating ocean bottom seismometer sinking coupling rack, the method comprising: installing the ocean bottom seismograph to a spiral penetration type ocean bottom seismograph decoupling frame by means of a steel wire rope and a compression-resistant spring; distributing the ocean bottom seismograph and the spiral penetration type ocean bottom seismograph sinking coupling frame into water; in the sinking process, the spiral penetration type submarine seismograph sinking coupling frame makes rotary motion by utilizing a plurality of arc-shaped blades; after reaching the seabed, the spiral blade is pushed to penetrate into the seabed by the rotary motion in the sinking process; and after the ocean bottom seismograph completes the observation task, releasing the steel wire rope by means of a releasing device carried by the ocean bottom seismograph, so that the pressure-resistant spring rebounds to push the ocean bottom seismograph to be separated from the spiral penetration type ocean bottom seismograph decoupling frame.

The spiral penetration type submarine seismograph counter-coupling frame can increase the penetration depth and is tightly coupled with the seabed, so that the observation precision of the submarine seismograph is improved. Meanwhile, the spiral penetration type ocean bottom seismograph is beneficial to smooth separation from the ocean bottom seismograph, and the recovery of the ocean bottom seismograph is promoted.

Drawings

The features, nature, and advantages of the present invention will become more apparent from the detailed description set forth below when taken in conjunction with the drawings. In the drawings, like reference numerals are used to designate corresponding parts throughout the several views. It is noted that the drawings described are only schematic and are non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes.

Fig. 1 shows a schematic structural view of a helical penetrating ocean bottom seismograph decoupling frame of the present application.

FIG. 2 shows a cross-sectional schematic view of the housing and curved blade of FIG. 1.

FIG. 3 shows a schematic view of the installation of the helical penetrating ocean bottom seismograph decoupling mount of the present application.

FIG. 4 illustrates an exemplary method of deploying and retrieving a marine seismometer using the helical penetrating marine seismometer decoupling mount of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with specific embodiments. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the described exemplary embodiments. It will be apparent, however, to one skilled in the art, that the described embodiments may be practiced without some or all of these specific details. In other exemplary embodiments, well-known structures have not been described in detail to avoid unnecessarily obscuring the concepts of the present disclosure. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Meanwhile, the various aspects described in the embodiments may be arbitrarily combined without conflict.

FIG. 1 shows a schematic structural diagram 100 of a helical penetrating ocean bottom seismometer dip-coupling mount of the present application.

Referring to fig. 1, the helical penetration marine seismograph counter-sunk coupling bracket (hereinafter sometimes simply referred to as "counter-sunk coupling bracket") of the present application includes a flange 101, a spring mounting hole 102, a hanging point 103, an arc-shaped blade 104, a housing 105, a penetration cone 106, and a helical blade 107. As shown, the flange 101 is located at the upper edge of the housing 105, the spring mounting hole 102 is located at the upper end face of the flange 101, the hanging point 103 is located at the lower end face of the flange 101, the arc-shaped blade 104 is connected to the side wall of the housing 105, the penetration cone 106 is connected to the bottom of the housing 105, and the spiral blade 107 is connected to the conical surface of the penetration cone 106.

The housing 105 is cylindrical with a bottom. The cylindrical side wall and bottom of housing 105 may be welded together. The inner diameter of the housing 105 is slightly larger than the outer diameter of the spherical structure of the ocean bottom seismograph.

Preferably, the flange 101 has a thickness of 50 mm and is welded to the upper edge of the housing 105. The flange 101 is large in size and provides a partial weight for the counter-sunk coupling frame. The upper end face of the flange 101 is provided with a spring mounting hole 102, and the lower end face is welded with a hanging point 103. The spring mounting holes 102 are filled with compression springs, and the hanging points 103 are used for hanging and buckling a steel wire rope connected with the ocean bottom seismograph, wherein the compression springs, the ocean bottom seismograph and the steel wire rope are shown in fig. 3.

Preferably, the counter coupling bracket includes 8 arc-shaped blades 104 uniformly distributed on the side wall of the housing 105. The root of the curved blade 104 and the sidewall of the shell 105 may be welded together. The arcuate vanes 104 curve radially outward from the sidewall of the housing 105 and in a uniform direction.

In some embodiments, the decoupling frame of the present application is a unitary structure. Specifically, the shell 105 and the flange 101, the shell 105 and the arc-shaped blade 104, the shell 105 and the penetration cone 106, the penetration cone 106 and the helical blade 107, and the flange 101 and the hanging point 103 are connected by welding.

The spring mounting hole 102 is a cylindrical blind hole. As shown, there are 4 sets of spring mounting holes, 3 per set, for a total of 12. The spring mounting holes are uniformly distributed on the upper end surface of the flange 101 in a ring shape.

The hanging points 103 are 4 in total, are cylindrical metal rods and are uniformly distributed on the lower end face of the flange 101 in an annular mode. Preferably, the distribution positions of the hanging points 103 are spaced apart from the distribution positions of the respective sets of spring mounting holes by a certain angle. In the embodiment in which the counter-sunk coupling has 4 suspension points and 12 spring mounting holes, the distribution of the suspension points 103 is preferably spaced 45 ° from the distribution of the sets of spring mounting holes.

The penetration cone 106 is a solid structure and provides a partial weight for the counter-coupling bracket. Preferably, the angle of taper of the penetration cone 106 is 30 °, which facilitates smooth penetration of the decoupling cage into the seabed substrate.

As shown, the helical blades 107 extend helically along the conical surface of the penetration cone 106. The root of the helical blade 107 is welded to the conical surface of the penetration cone 106. The spiral direction of the spiral blade 107 is opposite to the bending direction of the arc-shaped blade 104. Specifically, when viewed from the top of the decoupling frame downward, if the arc-shaped blade 104 is bent in the clockwise direction, the spiral direction of the helical blade 107 should be set to the left-hand rotation, and if the arc-shaped blade 104 is bent in the counterclockwise direction, the spiral direction of the helical blade 107 should be set to the right-hand rotation.

When the sinking coupling frame descends in water, the arc-shaped blades 104 can drive the sinking coupling frame to rotate by utilizing the transverse sea current, and the rotating speed is increased along with the descending depth. After reaching the seabed, the rotating motion of the sinking coupling generated in the descending process can push the helical blade 107 to penetrate into the seabed substrate, so as to improve the penetration depth and maintain the existing penetration state after the rotation is stopped.

Although the present disclosure shows a counter sink having 8 arc-shaped blades, 12 spring mounting holes, and 4 hanging points, the present application is not limited thereto. In other implementations, other suitable numbers of arcuate blades, spring mounting holes, and hanging points may be employed. Likewise, while the distribution of hang points 103 is shown herein as being spaced 45 apart from the distribution of sets of spring mounting holes and having a cone angle of 30 ° for the penetration cone, it is understood that these angles are merely exemplary. Other suitable angles may be used in different implementations.

For a better understanding of the present application, FIG. 2 shows a cross-sectional schematic view 200 of the casing and curved blade of FIG. 1. Specifically, fig. 2 illustrates a cross-sectional schematic view of the housing 105 and the arcuate blades 104 as viewed from the top of the decoupling mount looking down. For simplicity of illustration, only a single arcuate blade that curves clockwise is shown in fig. 2.

As shown in fig. 2, a denotes a proximal end point of the arc-shaped blade 104 and the end point intersects with the side wall of the housing 105, B denotes a distal end point of the arc-shaped blade 104, and C denotes a center of a circular arc in which the arc-shaped blade 104 is located. Line L represents the tangent to the circle of housing 105 at point a.

To illustrate the angular relationship of the housing 105 and the arcuate blade 104, the angle between the arcuate blade 104 and the housing 105 is represented by the angle α between the line segment AB and the line L, as shown in FIG. 2. In addition, the angle β between line segments AC and BC is used to represent the arc of the arcuate blade 104 itself. Preferably, the angle α ranges between 15 ° and 60 °. Preferably, the angle β is not greater than 90 °.

Although only clockwise curved arcuate vanes are shown in fig. 2, it is noted that the angular relationship described above applies equally to counterclockwise curved arcuate vanes.

FIG. 3 shows a schematic installation diagram 300 of the helical penetrating ocean bottom seismograph decoupling mount of the present application.

Reference is now made to fig. 3 in conjunction with fig. 1. As shown in fig. 3, the ocean bottom seismograph 110 is a spherical structure. The middle part of the ocean bottom seismograph 110 is provided with a connecting disc, and the top part of the ocean bottom seismograph is provided with a release device 108. The release device 108 connects the ocean bottom seismometer to the decoupling frame through a steel cable 109 with rope buckles at two ends. Specifically, the rope loop at one end of the steel rope 109 is connected to the releasing device 108, and the rope loop at the other end is hooked to the corresponding hanging point 103 of the counter coupling bracket.

When the marine seismograph 110 is mounted to the decoupling frame, the compression springs 111 are inserted into the spring mounting holes 102 of the flange 101. The lower half of the ocean bottom seismograph 110 is fitted into the gimbal housing 105 so that the connection disc of the ocean bottom seismograph 110 is in contact with the compression springs 111. The compression springs 111 are then compressed by an external force, causing the connection pads of the ocean bottom seismometer to further contact the flanges 101 of the decoupling bracket. Then, two end rope buckles of the steel wire rope 109 are respectively hung on the releasing device 108 and the corresponding hanging points 103, so that the fixed connection between the ocean bottom seismograph 110 and the decoupling frame is realized. After the installation is completed, the compression spring 111 is in a compressed state and maintains a certain pre-pressure.

To better understand the method of use of the deep coupling rig, FIG. 4 illustrates a method 400 of deploying and retrieving a seismometer using the helically penetrating ocean bottom seismometer deep coupling rig of the present application.

The method 400 begins at step 405. At step 405, the ocean bottom seismometer is mounted to a decoupling frame by means of wire ropes and compression springs, thereby forming a complete set of equipment. After the lower half of the ocean bottom seismograph 110 is installed in the decoupling frame shell 105, the two ends of the wire rope 109 are respectively hung on the release device 108 and the corresponding hanging point 103, and the installation is completed. After the installation is completed, the compression springs 111 in the counter-sunk coupling frame are in a compressed state. The detailed process of mounting the ocean bottom seismograph to the decoupling frame is described in fig. 3 and will not be described in detail.

At step 410, the entire set of equipment (i.e., the ocean bottom seismograph and the decoupling mounts) is deployed into the water, and the entire set of equipment sinks under its own weight.

In step 415, the sink coupling bracket rotates with the curved blade 104 during the sinking process. Specifically, the curved blades 104 of the decoupling bracket derive power from the transverse ocean currents, produce rotational motion, and rotate the ocean bottom seismometer together. And the rotational speed is increased during the descent.

After the installation has reached the seabed, the rotational movement generated during the sinking process pushes the helical blades 107 into the seabed in step 420. And (3) slowing down the rotation motion along with the increase of the penetration depth, and finally stopping the rotation to finish the distribution of the ocean bottom seismograph. After the rotation is stopped, the sinking coupling frame can keep the existing penetration state, and the coupling tightness can not be reduced due to the action of ocean currents. Meanwhile, the conical structure of the penetration cone is beneficial to increasing the penetration depth. Furthermore, both the flange and the penetration cone provide a counterweight to the counter-coupling frame, thereby also facilitating the increase of the penetration depth.

At step 425, after the ocean bottom seismometer completes the survey task, the ocean bottom seismometer is disengaged from the counter-coupling bracket by means of the wire rope and the compression springs. Specifically, the release device 108 on the ocean bottom seismograph is disengaged from the wire rope 109, and then the compression springs 111 in the spring mounting holes 102 eject the ocean bottom seismograph 110 upward under the action of the pre-pressure force, so that the ocean bottom seismograph 110 is disengaged from the counter coupling frame. Subsequently, the ocean bottom seismograph 110 floats up to the sea surface by means of self buoyancy, and recovery is completed.

In the method 400, the sinking coupling frame can obtain power from the sea current through the arc-shaped blades to rotate, the spiral blades are pushed to penetrate into the sea bottom after the spiral blades reach the sea bottom, and the coupling tightness is not reduced due to the action of the sea current after the rotation is stopped. Therefore, the sinking coupling frame can realize effective penetration and is tightly coupled with the seabed. In addition, when the submarine seismograph is recovered, the compression-resistant springs in the sinking coupling frame can eject the submarine seismograph, so that the submarine seismograph is smoothly separated from the sinking coupling frame.

The detailed description set forth above in connection with the appended drawings describes examples and is not intended to represent all examples that may be implemented or fall within the scope of the claims. The terms "example" and "exemplary" when used in this specification mean "serving as an example, instance, or illustration," and do not mean "superior or superior to other examples.

Spatial terms (e.g., "top," "bottom," "middle," "upper," "lower," etc.) used herein are for illustrative purposes only and do not define descriptors. These terms are relative and do not denote a particular absolute orientation.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, usage of such phrases may not refer to only one embodiment. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

While various embodiments have been illustrated and described, it is to be understood that the embodiments are not limited to the precise configuration and components described above. Various modifications, substitutions, and improvements apparent to those skilled in the art may be made in the arrangement, operation, and details of the devices disclosed herein without departing from the scope of the claims.

Claims

1. A screw-in marine seismograph decoupling mount comprising:

a housing, the housing being cylindrical with a bottom;

a flange located at an upper edge of the housing;

a plurality of arcuate vanes connected to a sidewall of the housing;

a penetration cone connected to the bottom of the shell; and

a helical blade connected to the conical surface of the penetration cone;

the arc-shaped blades are bent outwards from the side wall of the shell in the radial direction and have the same bending direction, the spiral blade extends in a spiral shape along the conical surface of the penetration cone, and the bending direction of the arc-shaped blades is opposite to the rotating line direction of the spiral blade.

2. The screw penetrating ocean bottom seismograph decoupling mount of claim 1, wherein the plurality of arcuate vanes are evenly distributed around the side wall of the housing.

3. The screw penetration ocean bottom seismograph decoupling frame of claim 1, wherein the screw penetration ocean bottom seismograph decoupling frame is of a one-piece structure, wherein the shell and the flange, the shell and the plurality of arc-shaped blades, the shell and the penetration cone, and the penetration cone and the helical blades are connected by welding.

4. The screw penetrating marine seismograph counter-coupling rack of claim 1, further comprising a plurality of sets of spring mounting holes uniformly distributed in a ring shape on the upper end surface of the flange, wherein each set of spring mounting holes comprises an equal number of spring mounting holes.

5. The apparatus of claim 4, further comprising a compression spring loaded into each spring mounting hole, wherein the compression spring is in compression after the apparatus is mounted to the apparatus.

6. The deep coupling frame for the SPD of claim 1, further comprising a plurality of hanging points, wherein the hanging points are uniformly distributed on the lower end surface of the flange in a ring shape and are welded with the flange, and the hanging points are used for hanging and buckling a steel wire rope connected with the SPD.

7. A method of deploying and retrieving a marine seismometer using the screw penetration marine seismometer sinker coupling according to any one of claims 1-6, comprising:

mounting the ocean bottom seismograph to the spirally penetrating ocean bottom seismograph counter-coupling frame by means of a steel wire rope and a compression-resistant spring;

laying the ocean bottom seismograph and the spiral penetration type ocean bottom seismograph sinking coupling frame into water;

in the sinking process, the spiral penetration type submarine seismograph sinking coupling frame utilizes the plurality of arc-shaped blades to do rotary motion;

after reaching the seabed, the spiral blade is pushed to penetrate into the seabed by the rotary motion in the sinking process; and

after the ocean bottom seismograph completes the observation task, the steel wire rope is released by means of a releasing device carried by the ocean bottom seismograph, so that the compression-resistant spring rebounds and further the ocean bottom seismograph is separated from the spiral penetration type ocean bottom seismograph decoupling frame.