A new undisturbed marine sediment sampling bit

Abstract

The application discloses a novel undisturbed ocean sediment sampling cutter head, which comprises an outer cylinder, an inner cylinder, a turnover lever assembly and a petal assembly. When the sampler moves downward, the petal is clamped by the turnover lever by using the water flow and the upward force of the sediment on the turnover lever, so that the petal is kept in an open state during the whole sampling process. When the sampler starts to be pulled upward after the sampling is completed, the petal is pried by using the downward force of the sediment on the turnover lever, so that the petal is closed. The cutter head utilizes the natural resistance generated by the water flow and the sediment, and through the linkage of the turnover lever and the petal, the petal is kept in an open state and closely contacts the inner wall during the whole sampling process, so that the problem that the elastic petal disturbs the sediment sampling and generates resistance can be effectively solved. When the cutter is pulled, the petal can be closed in time by means of the sediment resistance and the action of the turnover lever, so that the sediment sample leakage is effectively blocked, the sampling efficiency is improved, and the disturbance of the petal to the sediment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of marine sediment sampling, in particular to a new type of undisturbed marine sediment sampling cutter head. BACKGROUND

[0002] The sampling cutter head of the existing marine columnar sediment sampler mostly adopts a spring petal type cutter head, the petals are always in a closed state before touching the bottom, and the petals can only be pushed open under the extrusion of the sediment, which not only generates resistance to the sediment sampling, reduces the sampling rate and reduces the sampling length, but also causes great disturbance to the sediment, destroys the original sediment sequence and microstructure of the sediment sample, and affects the sampling quality and subsequent sample analysis. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides a new type of undisturbed marine sediment sampling cutter head, which can improve the sampling rate and sample collection quality on the basis of protecting the original sequence and structure of the sediment sample to the maximum extent.

[0004] To achieve the above-mentioned purpose, the present application can adopt the following technical solutions:

[0005] A new type of undisturbed marine sediment sampling cutter head, comprising:

[0006] an inner cylinder and an outer cylinder, the outer cylinder and the inner cylinder are both hollow cylindrical structures, and the outer cylinder is sleeved on the outer circumferential surface of the inner cylinder; and

[0007] a flip lever assembly and a petal assembly coupled in motion, the flip lever assembly and the petal assembly are movably connected at the connection of the outer cylinder and the inner cylinder, the flip lever assembly is composed of a plurality of rectangular folding plates, and the petal assembly is composed of a plurality of petal leaves, wherein

[0008] the first bearing of the flip lever assembly is placed in the first square groove of the first groove group; the second rectangular plate in the flip lever assembly is clamped into the fifth groove in the petal assembly, when the first rectangular plate in the flip lever assembly is subjected to an upward force, the first petal in the petal assembly is clamped into the third groove group, the first petal is tangent to the inner wall of the first cylindrical segment through hole of the inner cylinder, the petal assembly is opened, when the first rectangular plate in the flip lever assembly is subjected to a downward force, the first rectangular plate in the flip lever assembly is pivoted on the first bearing and pries the first petal in the petal assembly through the second rectangular plate, the petal assembly is closed, and the aperture of the closed petal assembly is equal to the inner diameter of the first cylindrical segment through hole.

[0009] The new undisturbed ocean sediment sampling cutter head as described above, further, the inner cylinder is composed of the first cylindrical segment through hole of the upper part and the first inverted conical segment through hole of the lower part, the inner diameter of the first cylindrical segment through hole is equal to the inner diameter of the first inverted conical segment through hole, the upper part of the first inverted conical segment through hole is provided with the first groove;

[0010] The outer cylinder is composed of the second cylindrical segment through hole and the first protrusion of the bottom part, the inner diameter of the second cylindrical segment through hole of the outer cylinder is equal to the outer diameter of the first cylindrical segment through hole of the upper part of the inner cylinder, the outer diameter of the second cylindrical segment through hole of the outer cylinder is equal to the large diameter of the first inverted conical segment through hole of the lower part of the inner cylinder, the first protrusion is located at the bottom of the second cylindrical segment through hole, and the shape and size of the first protrusion are matched with the first groove of the upper part of the first inverted conical segment through hole of the lower part of the inner cylinder.

[0011] The new undisturbed ocean sediment sampling cutter head as described above, further, the first cylindrical segment through hole is provided with the first wall hole group, the first groove group, the second groove group and the third groove group along the radial direction of the lower part of the hole wall, the first wall hole group is a convex-shaped wall hole penetrating the inner wall from the outer wall, the rectangular width above the convex-shaped wall hole is greater than the width of the flip lever assembly, the rectangular height above the convex-shaped wall hole is one sixth of the inner diameter of the first cylindrical segment through hole, the rectangular width below the convex-shaped wall hole is less than the length of the bearing of the petal assembly, the rectangular height below the convex-shaped wall hole is one fourth of the inner diameter of the first cylindrical segment through hole, and the first wall hole group is a plurality of convex-shaped wall holes uniformly distributed along the meridian direction.

[0012] The new undisturbed ocean sediment sampling cutter head as described above, further, the first groove group is located on both sides of the rectangular top of the top part of the first wall hole group, which is a “┐” type first folding groove, the arc length of the first folding groove is less than the length of the bearing of the flip lever assembly, the first folding groove is composed of a first folding groove opening and a first square groove, the first folding groove opening penetrates the inner wall of the first cylindrical segment through hole and communicates with the first square groove, the first square groove is located between the inner wall and the outer wall of the lower part of the first cylindrical segment through hole, the width of the first square groove is less than the wall thickness of the first cylindrical segment through hole, and the distance from the inner wall of the first cylindrical segment through hole is less than the distance from the outer wall of the first cylindrical segment through hole, and the first groove group is a plurality of first folding grooves uniformly distributed along the meridian direction.

[0013] The new undisturbed ocean sediment sampling cutter head as described above, further, the second groove group is located on both sides of the rectangular bottom of the lower part of the first wall hole group, which is a “┌” type second folding groove, the arc length of the second folding groove is slightly less than the length of the bearing of the petal assembly, the second folding groove is composed of a second folding groove opening and a second square groove, the second folding groove opening penetrates the inner wall of the first cylindrical segment through hole and communicates with the second square groove, the second square groove is located between the inner wall and the outer wall of the lower part of the second cylindrical segment through hole, the width of the first square groove is slightly less than the wall thickness of the first cylindrical segment through hole, and the distance from the inner wall of the first cylindrical segment through hole is greater than the distance from the outer wall of the first cylindrical segment through hole, and the second groove group is a plurality of second folding grooves uniformly distributed along the meridian direction.

[0014] The new undisturbed ocean sediment sampling cutter head as described above, further, the third groove group is arranged on the inner wall of the lower part of the first cylindrical segment through hole, and has a first groove group composed of a second groove in the shape of an isosceles triangle located above the convex wall hole, a third groove in the shape of a right triangle located on both sides of the upper part of the rectangular shape of the convex wall hole, and a fourth groove in the shape of a right triangle located on both sides of the lower part of the rectangular shape of the convex wall hole, and the third groove group is a plurality of first groove groups uniformly distributed along the meridian direction.

[0015] The new undisturbed ocean sediment sampling cutter head as described above, further, the second wall hole group is arranged on the wall of the second cylindrical segment through hole in the radial direction, and the second wall hole group is a first square wall hole in the shape of a rectangle, the width of the first square wall hole is equal to the width of the upper part of the rectangular shape of the convex wall hole, and the height of the first square wall hole is 1.5 times the height of the upper part of the rectangular shape of the convex wall hole, the second wall hole group is a plurality of first square wall holes uniformly distributed along the meridian direction, the second wall hole group is axially aligned with the first wall hole group, and the distance between the top of the second wall hole group and the top of the first cylindrical segment through hole is less than the distance between the top of the first wall hole group and the top of the first cylindrical segment through hole.

[0016] The new undisturbed ocean sediment sampling cutter head as described above, further, the rectangular folding plate is composed of a first rectangular plate and a second rectangular plate, the first rectangular plate and the second rectangular plate are connected as a whole and form a certain angle, the first bearing is located on both sides of the turning part of the rectangular folding plate, the first bearing is a cylinder, and the top of the first rectangular plate is provided with an inclined arc-shaped groove.

[0017] The new undisturbed ocean sediment sampling cutter head as described above, further, the petal is composed of a first leaf, a first clamping plate, a fifth groove and a second bearing, the first leaf and the first clamping plate are connected as a whole, the second bearing is located on both sides of the connection between the first leaf and the first clamping plate, the second bearing is mainly characterized by a cylinder, the fifth groove is located between the first leaf and the first clamping plate, the width of the first clamping plate is less than the width of the lower part of the rectangular shape of the inner cylindrical convex wall hole, the first leaf is in the shape of a sector, the radius of the first leaf is less than the radius of the first cylindrical segment through hole, the central angle of the first leaf is less than 360 degrees divided by the number of petals, the bottom surface of the first leaf is flat, the thickness of the first leaf gradually decreases from the second bearing to the center of the sector of the first leaf, and the thickness of the first leaf decreases on both sides near the second bearing.

[0018] The new undisturbed ocean sediment sampling cutter head as described above, further, the number of second folding grooves in the second groove group of the lower part of the first cylindrical segment through hole and the number of petals in the petal assembly correspondingly arranged, the second bearing in the petal assembly is placed in the second square groove in the second folding groove; the number of first folding grooves in the first groove group of the lower part of the first cylindrical segment through hole and the number of rectangular folding plates of the flip lever assembly correspondingly arranged.

[0019] Compared with the prior art, the present application has the beneficial effect that when the sampler moves downward, the petals are kept open by the water flow and the sediment force on the turning lever, and when the sampler starts to move upward after sampling is completed, the petals are closed by the sediment force on the turning lever and the bearing of the turning lever as a fulcrum. Therefore, the cutter head uses the natural resistance generated by the water flow and the sediment to ensure that the petals are kept open and close to the inner wall during the whole sampling process, effectively solving the problem of disturbance and resistance of the elastic petals to the sediment sampling, and ensuring that the petals can be closed in time by the sediment resistance and the turning lever during the cutter lifting, effectively preventing the sediment sample from leaking, improving the sampling efficiency, reducing the disturbance of the petals to the sediment, and improving the sampling quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure diagram of the inner cylinder of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0022] Figure 2 The upper view of the inner cylinder of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0023] Figure 3 The sectional view of the inner cylinder of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0024] Figure 4 The structure diagram of the outer cylinder of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0025] Figure 5 The side view of the turning lever of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0026] Figure 6 The structure diagram of the turning lever of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0027] Figure 7 The side view of the petal of the new undisturbed marine sediment sampling cutter head of the embodiment of the present application;

[0028] Figure 8The structural schematic view of the petal of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application;

[0029] Figure 9 The upper view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application when diving;

[0030] Figure 10 The sectional view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application when diving;

[0031] Figure 11 The upper view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application when the cutter is lifted;

[0032] Figure 12 The sectional view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application when the cutter is lifted;

[0033] Figure 13 The upper view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application after the petal is closed;

[0034] Figure 14 The sectional view of the new undisturbed ocean sediment sampling cutter head of the embodiment of the present application after the petal is closed.

[0035] Wherein: 1, inner cylinder; 101, first cylindrical segment through hole; 102, first inverted conical segment through hole; 103, first folding groove opening; 104, first square groove; 105, "convex" wall hole; 106, second groove; 107, second folding groove opening; 108, second square groove; 109, first groove; 110, cutter edge; 112, third groove; 113, fourth groove; 2, outer cylinder; 201, second cylindrical segment through hole; 202, first square wall hole; 203, first protrusion; 3, turnover lever assembly; 301, bevel arc-shaped groove; 302, first rectangular plate; 303, second rectangular plate; 304, first bearing; 4, petal assembly; 401, first blade; 402, first clamping plate; 403, fifth groove; 404, second bearing. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0037] Embodiment:

[0038] It has to be understood that the terms "first", "second", etc. as used in the specification and claims of the application and the above figures are used to distinguish similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in other than the order shown or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, as used in the embodiments of the application, are intended to cover the unexhaustive inclusion of, for example, processes, methods, systems, products, or devices that include not only those steps or units expressly listed, but also other steps or units that are not expressly listed or inherent to such processes, methods, products, or devices.

[0039] It is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0040] In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited. In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0042] Reference is made to Figures 1 to 14The application provides a novel undisturbed ocean sediment sampling cutter head, which can comprise an inner cylinder 1, an outer cylinder 2, a coupled motion connecting turnover lever assembly 3 and petal assembly 4, the outer cylinder 2 and the inner cylinder 1 are both hollow columnar structures, and the outer cylinder 2 is sleeved on the outer circumferential surface of the inner cylinder 1; the turnover lever assembly 3 and the petal assembly 4 are movably connected at the connecting part of the outer cylinder 2 and the inner cylinder 1, the turnover lever assembly 3 is composed of a plurality of rectangular folding plates, and the petal assembly 4 is composed of a plurality of petal leaves, wherein when the first rectangular plate 302 in the turnover lever assembly 3 is subjected to an upward force, the first petal leaf 401 in the petal assembly 4 is tangent to the inner wall of the first cylindrical segment through hole 101 of the inner cylinder 1, and then the petal assembly 4 is opened; when the first rectangular plate 302 in the turnover lever assembly 3 is subjected to a downward force, the first rectangular plate 302 in the turnover lever assembly 3 is pivoted on the first bearing 304 to pry the first petal leaf 401 in the petal assembly 4 through the second rectangular plate 303, and then the petal assembly 4 is closed, and the aperture of the closed petal assembly 4 is equal to the inner diameter of the first cylindrical segment through hole 101.

[0043] In the embodiment, when the sampler moves downward, the turnover lever assembly 3 is clamped by the petals by using the upward force of water flow and sediment, so that the petals are kept in an open state during the whole sampling process, when the sampler starts to be lifted upward after the sampling is completed, the turnover lever assembly 3 is pivoted on the bearing of the turnover lever assembly 3 by using the downward force of the sediment on the turnover lever assembly 3, so that the petals are closed. Therefore, the cutter head uses the natural resistance generated by water flow and sediment to ensure that the petals are kept in an open state and closely contact the inner wall during the whole sampling process through the linkage of the turnover lever assembly 3 and the petal assembly, so that the problem of disturbance and resistance of the elastic petals to the sampling of the sediment can be effectively solved, the petals can be closed in time by the sediment resistance and the effect of the turnover lever assembly 3 when the cutter is lifted, the leakage of the sediment sample can be effectively blocked, the sampling efficiency is improved, the disturbance of the petals to the sediment is reduced, and the sampling quality is improved.

[0044] Referring again to Figures 1 to 14 A novel undisturbed ocean sediment sampling cutter head can comprise an inner cylinder 1, an outer cylinder 2, a turnover lever assembly 3 and a petal assembly 4, the outer cylinder 2 and the inner cylinder 1 are both hollow columnar structures processed from pressure-resistant stainless steel columns, the outer wall of the inner cylinder 1 is composed of a first cylindrical segment through hole 101 at the upper part and a first inverted conical segment through hole 102 at the lower part, the inner diameter of the first cylindrical segment through hole 101 is equal to the inner diameter of the first inverted conical segment through hole 102; the outer diameter of the first cylindrical segment through hole 101 is equal to the inner diameter of the outer cylinder 2, and the large diameter of the first inverted conical segment through hole 102 is equal to the outer diameter of the outer cylinder 2; the first inverted conical segment through hole 102 at the lower part of the inner cylinder 1 is provided with a first groove 109 at the upper part, and the shape and size of the first groove 109 are matched with the first protrusion 203 of the second cylindrical segment through hole 201 of the outer cylinder 2.

[0045] The outer cylinder 2 is arranged outside the inner cylinder 1, and the outer cylinder 2 is composed of a second cylindrical segment through hole 201 and a bottom first protrusion 203. The inner diameter of the second cylindrical segment through hole 201 of the outer cylinder 2 is equal to the outer diameter of the first cylindrical segment through hole 101 of the upper part of the inner cylinder 1, the outer diameter of the second cylindrical segment through hole 201 of the outer cylinder 2 is equal to the large diameter of the first inverted conical segment through hole 102 of the lower part of the inner cylinder 1, and the first protrusion 203 is located at the bottom of the second cylindrical segment through hole 201. The shape and size of the first protrusion 203 are matched with the first recess 109 of the upper part of the first inverted conical segment through hole 102 of the lower part of the inner cylinder 1, that is, the bottom first protrusion 203 of the outer cylinder 2 is clamped into the first recess 109 of the upper part of the first inverted conical segment through hole 102.

[0046] Further, the first cylindrical segment through hole 101 is provided with a first wall hole group, a first groove group, a second groove group and a third groove group along the radial direction. The main feature of the first wall hole group is a "convex" wall hole 105 penetrating the inner wall from the outer wall. The rectangular width above the "convex" wall hole 105 is slightly larger than the width of the flip lever assembly 3, and the rectangular height above the "convex" wall hole 105 is about one sixth of the inner diameter of the first cylindrical segment through hole 101. The rectangular width below the "convex" wall hole 105 is slightly smaller than the bearing length of the petal assembly 4, and the rectangular height below the "convex" wall hole 105 is about one fourth of the inner diameter of the first cylindrical segment through hole 101. The first wall hole group is composed of a plurality of "convex" wall holes 105 uniformly distributed along the meridian direction.

[0047] Specifically, the first groove group is located on both sides of the top rectangular top of the first wall hole group, and the main feature is a "┐" type first folding groove. The arc length of the first folding groove is slightly smaller than the bearing length of the flip lever assembly 3. The first folding groove is composed of a first folding groove opening 103 and a first square groove 104. The first folding groove opening 103 penetrates the inner wall of the first cylindrical segment through hole 101 and communicates with the first square groove 104. The first square groove 104 is located between the inner wall and the outer wall of the lower part of the first cylindrical segment through hole 101. The width of the first square groove 104 is slightly smaller than the wall thickness of the first cylindrical segment through hole 101, and the distance from the inner wall of the first cylindrical segment through hole 101 is smaller than the distance from the outer wall of the first cylindrical segment through hole 101. The first groove group is composed of 10 first folding grooves uniformly distributed along the meridian direction.

[0048] The second groove group is located on both sides of the bottom rectangular bottom of the top of the first wall hole group, and the main feature is a "┌" type second folding groove. The arc length of the second folding groove is slightly smaller than the bearing length of the petal assembly 4. The second folding groove is composed of a second folding groove opening 107 and a second square groove 108. The second folding groove opening 107 penetrates the inner wall of the first cylindrical segment through hole 101 and communicates with the second square groove 108. The second square groove 108 is located between the inner wall and the outer wall of the lower part of the second cylindrical segment through hole 201. The width of the first square groove 104 is slightly smaller than the wall thickness of the first cylindrical segment through hole 101, and the distance from the inner wall of the first cylindrical segment through hole 101 is greater than the distance from the outer wall of the first cylindrical segment through hole 101. The second groove group is composed of 10 second folding grooves uniformly distributed along the meridian direction.

[0049] The third groove group is arranged on the inner wall of the lower part of the first cylindrical segment through hole 101, and mainly comprises a first groove group 109 composed of a plurality of triangular grooves. The first groove group 109 is composed of an isosceles triangular second groove 106 located above the “convex” shaped wall hole 105, a right-angled triangular third groove 112 located on both sides of the upper part of the “convex” shaped wall hole 105, and a right-angled triangular fourth groove 113 located on both sides of the lower part of the “convex” shaped wall hole 105. The third groove group is composed of 10 first groove groups 109 distributed along the meridian direction.

[0050] The second wall hole group is arranged on the hole wall of the second cylindrical segment through hole 201 along the radial direction, and mainly comprises a first square wall hole 202 with a rectangular shape. The width of the first square wall hole 202 is equal to the width of the upper part of the “convex” shaped wall hole 105, and the height of the first square wall hole 202 is about 1.5 times the height of the upper part of the “convex” shaped wall hole 105. The second wall hole group is composed of 10 first square wall holes 202 distributed along the meridian direction. The second wall hole group is aligned with the first wall hole group along the axial direction, and the distance between the top of the second wall hole group and the top of the first cylindrical segment through hole 101 is slightly smaller than the distance between the top of the first wall hole group and the top of the first cylindrical segment through hole 101.

[0051] Referring to Figures 5-6 The overturning lever assembly 3 can be composed of 10 rectangular folding plates. The rectangular folding plate is composed of a longer first rectangular plate 302, a shorter second rectangular plate 303, and a first bearing 304. The first rectangular plate 302 and the second rectangular plate 303 are connected as a whole and form a certain angle. The first bearing 304 is located on both sides of the turning part of the rectangular folding plate. The first bearing 304 mainly comprises a cylinder. The top of the first rectangular plate 302 is provided with a beveled arc-shaped groove 301. The number of the first folding groove in the first groove group of the lower part of the first cylindrical segment through hole 101 and the number of the rectangular folding plates of the overturning lever assembly 3 correspond to each other, and the first bearing 304 of the overturning lever assembly 3 is arranged in the first square groove 104 in the first groove group.

[0052] Referring to Figures 7-8, the petal assembly 4 can be composed of 10 leaflets, each leaflet being composed of a first blade 401, a first clamping plate 402, a fifth groove 403 and a second bearing 404, the first blade 401 being integrated with the first clamping plate 402, the second bearing 404 being located on both sides of the joint between the first blade 401 and the first clamping plate 402, the second bearing 404 being mainly characterized by a cylinder, the fifth groove 403 being located between the first blade 401 and the first clamping plate 402, the first clamping plate 402 having a width slightly smaller than the rectangular width of the lower part of the inner cylindrical 1 " convex" wall hole 105, the first blade 401 being a sector with a radius slightly smaller than the radius of the first cylindrical section through hole 101 and a central angle slightly smaller than 360 degrees divided by the number of leaflets, the bottom surface of the first blade 401 being flat, the thickness of the first blade 401 decreasing from the second bearing 404 to the center of the sector, and the thickness of the first blade 401 decreasing on both sides near the second bearing 404. Among them, the second folding groove in the second groove group at the lower part of the first cylindrical section through hole 101 and the number of leaflets in the petal assembly 4 are correspondingly arranged, and the second bearing 404 in the petal assembly 4 is placed in the second square groove 108 of the second folding groove.

[0053] Among them, the second rectangular plate 303 in the flip lever assembly 3 is clamped into the fifth groove 403 in the petal assembly 4, when the first rectangular plate 302 in the flip lever assembly 3 is subjected to an upward force, the first blade 401 in the petal assembly 4 is clamped into the third groove group, the first blade 401 is tangent to the inner wall of the first cylindrical section through hole 101 of the inner cylinder 1, the petal assembly 4 is opened, so that the knife edge 110 is always in a completely open state, and the sediments can smoothly pass through the knife edge 110, achieving the purpose of reducing disturbance. When the first rectangular plate 302 in the flip lever assembly 3 is subjected to a downward force, the first rectangular plate 302 in the flip lever assembly 3 is pivoted around the first bearing 304 to pry the first blade 401 in the petal assembly 4 through the second rectangular plate 303, the petal assembly 4 is closed, and the aperture of the petal assembly 4 is equal to the inner diameter of the first cylindrical section through hole 101, so as to close the downward passage of the knife edge 110 and achieve the purpose of plugging the sediments.

[0054] In order to better understand the present application, the new undisturbed marine sediment sampling cutter head of the embodiment of the present application is described below through the installation process and the sampling process.

[0055] When installing, first, the first leaf 401 of the petal assembly 4 is passed through the "convex" wall hole 105 from the outer wall of the first cylindrical segment through hole 101 of the inner cylinder 1 one by one, and the second bearing 404 in the petal assembly 4 is placed in the second square groove 108 of the second folding groove through the second folding groove opening 107, then the outer cylinder 2 is sleeved into the first cylindrical segment through hole 101 of the inner cylinder 1 from the top of the inner cylinder 1, and rotated to the appropriate position to make the first protrusion 203 at the bottom of the outer cylinder 2 clamped into the first recess 109 at the upper part of the first inverted conical segment through hole 102, the first protrusion 203 and the first recess 109 are aligned and clamped to ensure that the first wall hole group of the inner cylinder 1 and the second wall hole group of the outer cylinder 2 can be aligned in the axial direction without misalignment each time the installation is performed. The first rectangular plate 302 of the turnover lever assembly 3 is passed through the "convex" wall hole 105 and the first square wall hole 202 from the inside of the first cylindrical segment through hole 101 of the inner cylinder 1 one by one in sequence, and the first bearing 304 of the turnover lever assembly 3 is placed in the first square groove 104 of the first folding groove through the first folding groove opening 103, the second rectangular plate 303 in the turnover lever assembly 3 is clamped into the fifth recess 403 in the petal assembly 4, the first leaf 401 in the petal assembly 4 is clamped into the third groove group so that the first leaf 401 is tangent to the inner wall of the first cylindrical segment through hole 101 of the inner cylinder 1, and a rubber ring is clamped into the beveled arc-shaped recess 301 of the turnover lever assembly 3 to ensure that the second rectangular plate 303 is always clamped in the fifth recess 403 before entering the water, and a new type of undisturbed marine sediment sampling cutter head device (hereinafter referred to as the device) is formed.

[0056] When the sampling is performed, the marine columnar sediment sampler is vertically dived to the seabed at a constant speed through the winch steel cable on the ship, and when diving, as shown in Figure 9 and Figure 10 , the device moves downward, the first rectangular plate 302 is subjected to an upward force under the impact of the water flow moving upward relative to the device, under the action of the lever, the second rectangular plate 303 is always clamped in the fifth recess 403 so that the first leaf 401 is tangent to the inner wall of the first cylindrical segment through hole 101 of the inner cylinder 1, and the device is always in a completely unobstructed state. Similarly, when the device contacts the seabed and continuously moves to the depth of the sediment, the first rectangular plate 302 is subjected to an upward force under the resistance of the sediment, under the action of the lever, the second rectangular plate 303 is always clamped in the fifth recess 403 so that the first leaf 401 is tangent to the inner wall of the first cylindrical segment through hole 101 of the inner cylinder 1, and the device is always in a completely unobstructed state, and the sediment located at the position of the first inverted conical segment through hole 102 of the inner cylinder 1 can smoothly enter the sampler, achieving the purpose of reducing the disturbance to the sediment sampling process. When the cutter is lifted after the sampling is completed, as shown in Figure 11 and Figure 12As shown, during the upward movement of the device, the first rectangular plate 302 is subjected to a downward force under the resistance of the sediment, and under the action of the lever, the first rectangular plate 302 makes the second rectangular plate 303 move upward with the first bearing 304 as the fulcrum, thereby prying the first leaf 401 in the petal assembly 4 to move the first leaf 401 toward the center of the first cylindrical segment through hole 101 of the inner cylinder 1, when the first leaf 401 forms a certain angle with the inner wall of the first cylindrical segment through hole 101, the sediment in the sampler moves downward under the action of gravity, and the first leaf 401 is pressed flat downward, and the petal assembly 4 is completely closed. The schematic diagram of the device after being closed is shown in FIG. 6. Figure 13 and Figure 14 as shown.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0058] The above embodiments are only for the purpose of illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the essence of the present application should be covered within the protection scope of the present application.

Claims

1. A novel undisturbed marine sediment sampling tip, characterized in that, include: Inner cylinder (1) and outer cylinder (2), both the outer cylinder (2) and the inner cylinder (1) are hollow columnar structures, and the outer cylinder (2) is sleeved on the outer circumferential surface of the inner cylinder (1); as well as, A rotating lever assembly (3) and a petal assembly (4) are coupled and connected. The rotating lever assembly (3) and the petal assembly (4) are movably connected at the connection between the outer cylinder (2) and the inner cylinder (1). The rotating lever assembly (3) is composed of multiple rectangular plates, and the petal assembly (4) is composed of multiple petals. The lower wall of the through hole (101) of the first cylindrical section is provided with a first wall hole group, a first groove group, a second groove group, and a third groove group along the radial direction. The third groove group is located on the lower inner wall of the through hole (101) of the first cylindrical section and has a first groove group composed of multiple triangular grooves. The petal is composed of a first blade (401), a first retaining plate (402), a fifth groove (403), and a second bearing (404). The first blade (401) and the first retaining plate (402) are integrated. The fifth groove (403) is located between the first blade (401) and the first retaining plate (402). The first bearing (304) of the flip lever assembly (3) is placed in the first square groove (104) of the first groove group; the second rectangular plate (303) of the flip lever assembly (3) is inserted into the fifth groove (403) of the petal assembly (4); when the first rectangular plate (302) of the flip lever assembly (3) is subjected to an upward force, the first blade (401) of the petal assembly (4) is inserted into the third groove group, and the first blade (401) is tangent to the inner cylinder (1) of the first groove group. The inner wall of the cylindrical section through hole (101) is open. When the first rectangular plate (302) in the flip lever assembly (3) is subjected to a downward force, the first rectangular plate (302) in the flip lever assembly (3) uses the first bearing (304) as a fulcrum and pryes the first blade (401) in the petal assembly (4) through the second rectangular plate (303), and the petal assembly (4) closes. The diameter of the closed hole of the petal assembly (4) is equal to the inner diameter of the first cylindrical section through hole (101).

2. The novel undisturbed marine sediment sampling tip according to claim 1, characterized in that, The inner cylinder (1) is composed of a first cylindrical section through hole (101) at the top and a first inverted conical section through hole (102) at the bottom. The inner diameter of the first cylindrical section through hole (101) is equal to the inner diameter of the first inverted conical section through hole (102). A first groove (109) is provided on the upper part of the first inverted conical section through hole (102). The outer cylinder (2) is composed of a second cylindrical section through hole (201) and a bottom first protrusion (203). The inner diameter of the second cylindrical section through hole (201) of the outer cylinder (2) is equal to the outer diameter of the first cylindrical section through hole (101) at the upper part of the inner cylinder (1). The outer diameter of the second cylindrical section through hole (201) of the outer cylinder (2) is equal to the major diameter of the first inverted conical section through hole (102) at the lower part of the inner cylinder (1). The first protrusion (203) is located at the bottom of the second cylindrical section through hole (201). The shape and size of the first protrusion (203) match the first groove (109) at the upper part of the first inverted conical section through hole (102) at the lower part of the inner cylinder (1).

3. The novel undisturbed marine sediment sampling tip according to claim 1, characterized in that, The first wall hole group is a convex-shaped wall hole (105) that penetrates the inner wall from the outer wall. The width of the rectangle above the convex-shaped wall hole (105) is greater than the width of the flip lever assembly (3). The height of the rectangle above the convex-shaped wall hole (105) is one-sixth of the inner diameter of the first cylindrical section through hole (101). The width of the rectangle below the convex-shaped wall hole (105) is less than the bearing length of the petal assembly (4). The height of the rectangle below the convex-shaped wall hole (105) is one-quarter of the inner diameter of the first cylindrical section through hole (101). The first wall hole group consists of multiple convex-shaped wall holes (105) evenly distributed along the radial direction.

4. The novel undisturbed marine sediment sampling tip according to claim 3, characterized in that, The first groove group is located on both sides of the rectangular top above the top of the first wall hole group. It is a "┐" shaped first folded groove. The arc length of the first folded groove is less than the bearing length of the flip lever assembly (3). The first folded groove is composed of a first folded groove opening (103) and a first square groove (104). The first folded groove opening (103) penetrates the inner wall of the first cylindrical section through hole (101) and communicates with the first square groove (104). The first square groove (104) is located between the lower inner wall and the outer wall of the first cylindrical section through hole (101). The width of the first square groove (104) is less than the wall thickness of the first cylindrical section through hole (101), and the distance between it and the inner wall of the first cylindrical section through hole (101) is less than the distance between it and the outer wall of the first cylindrical section through hole (101). The first groove group is a plurality of first folded grooves evenly distributed along the radial direction.

5. The novel undisturbed marine sediment sampling tip according to claim 4, characterized in that, The second groove group is located on both sides of the bottom of the rectangle below the top of the first wall hole group. It is a "┌" shaped second folded groove. The arc length of the second folded groove is slightly less than the bearing length of the petal assembly (4). The second folded groove is composed of a second folded groove opening (107) and a second square groove (108). The second folded groove opening (107) penetrates the inner wall of the first cylindrical section through hole (101) and communicates with the second square groove (108). The second square groove (108) is located between the lower inner wall and the outer wall of the second cylindrical section through hole (201). The width of the first square groove (104) is slightly less than the wall thickness of the first cylindrical section through hole (101), and the distance between it and the inner wall of the first cylindrical section through hole (101) is greater than the distance between it and the outer wall of the first cylindrical section through hole (101). The second groove group consists of multiple second folded grooves evenly distributed along the radial direction.

6. The novel undisturbed marine sediment sampling tip according to claim 5, characterized in that, The first groove group consists of an isosceles triangular second groove (106) located above the convex wall hole (105), a right-angled triangular third groove (112) located on both sides of the upper rectangle of the convex wall hole (105), and a right-angled triangular fourth groove (113) located on both sides of the lower rectangle of the convex wall hole (105). The third groove group consists of multiple first groove groups evenly distributed along the longitudinal direction.

7. The novel undisturbed marine sediment sampling tip according to claim 6, characterized in that, The second cylindrical section through hole (201) has a second wall hole group arranged radially. The second wall hole group is a first square wall hole (202) in the shape of a rectangle. The width of the first square wall hole (202) is equal to the width of the rectangle above the convex wall hole (105). The height of the first square wall hole (202) is 1.5 times the height of the rectangle above the convex wall hole (105). The second wall hole group consists of multiple first square wall holes (202) evenly distributed along the radial direction. The second wall hole group is aligned with the first wall hole group along the axial direction. The distance between the top of the second wall hole group and the top of the first cylindrical section through hole (101) is less than the distance between the top of the first wall hole group and the top of the first cylindrical section through hole (101).

8. The novel undisturbed marine sediment sampling tip according to claim 7, characterized in that, The rectangular plate is composed of a longer first rectangular plate (302), a shorter second rectangular plate (303), and a first bearing (304). The first rectangular plate (302) and the second rectangular plate (303) are connected as one piece and form a certain angle. The first bearing (304) is located on both sides of the turning point of the rectangular plate. The first bearing (304) is a cylinder. The top of the first rectangular plate (302) is provided with a slanted arc-shaped groove (301).

9. The novel undisturbed marine sediment sampling tip according to claim 8, characterized in that, The second bearing (404) is located on both sides of the connection between the first blade (401) and the first clamping plate (402). The second bearing (404) is mainly characterized as a cylinder. The width of the first clamping plate (402) is smaller than the width of the lower rectangular part of the convex wall hole (105) of the inner cylinder (1). The first blade (401) is fan-shaped, and its radius is smaller than the radius of the through hole (101) of the first cylindrical section. Its central angle is less than 360 degrees divided by the number of blades. The bottom surface of the first blade (401) is flat. Its thickness decreases from the second bearing (404) to the center of the fan-shaped circle of the first blade (401). The thickness of the first blade (401) decreases on both sides near the second bearing (404).

10. The novel undisturbed marine sediment sampling tip according to claim 9, characterized in that, The number of the second folded groove in the second groove group at the lower part of the first cylindrical section through hole (101) and the number of petals in the petal assembly (4) are set accordingly. The second bearing (404) in the petal assembly (4) is placed in the second square groove (108) in the second folded groove. The number of the first folded groove in the first groove group at the lower part of the first cylindrical section through hole (101) and the number of rectangular plates in the flip lever assembly (3) are set accordingly.

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