Cement mixing pile core sample cutting assembly
By designing a core sample cutting component for cement mixing piles, and utilizing the forward and reverse rotation of the drill rod and centrifugal force to cut the core sample, the problem of incomplete core sample collection caused by the instability of drilling rig operators' abilities was solved, achieving efficient and reliable core sample testing.
Patent Information
- Application Number
- CN202422635472.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the existing technology, the success rate of core sampling in cement mixing piles is low due to the instability of the drilling rig operators' skills, which affects the test results and prolongs the test time.
A core sample extraction assembly for cement mixing piles was designed, including a collar, a ring groove, and a cutter head mechanism. The forward and reverse rotation of the drill rod, combined with centrifugal force, causes the blade of the cutter head mechanism to cut the core sample. The cooperation of the limiting rod and the limiting teeth ensures that the blade smoothly wedges into the core sample, thus achieving the extraction of the complete core sample.
It improved the success rate of single core sampling, ensured the integrity of the core sample, reduced the number of repeated core samplings, and improved detection efficiency.
Smart Images
Figure CN223611146U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of cement mixing pile sampling device, concretely relates to a cement mixing pile core sample intercepting assembly. BACKGROUND
[0002] Cement mixing pile is an effective form of soft foundation treatment, uses cement as the main agent of curing agent, uses the cement injection into the soil and fully mixes with the cement mixing pile machine, makes the cement and soil to have a series of physical and chemical reactions, makes the soft soil hardening and improves the foundation strength.
[0003] For the quality detection method of cement mixing pile, there are two kinds of conventional methods, portable sounding method and core sampling method, wherein the specific method of core sampling method is that after the completion of cement pile production process, the vertical bearing cement soil is checked after 90 days, and the horizontal bearing cement soil is checked after 28 days, and the core sampling method is used to check the pile body integrity, mixing uniformity, pile body strength and pile body verticality.
[0004] However, in the actual coring work, it is often found that due to the personal ability of the drilling operator, the core sample may be broken or crushed, so that the integrity of the core sample cannot be guaranteed, which not only affects the detection result of the whole pile body, but also needs to take the core sample repeatedly for detection, which prolongs the detection time. UTILITY MODEL CONTENTS
[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a cement mixing pile core sample intercepting assembly, which is used to solve the technical problem that the single core sampling success rate is not high due to the unstable ability of the drilling operator during the core sampling process of the cement mixing pile of the prior art, which not only affects the core sample detection result, but also easily prolongs the detection time.
[0006] The technical scheme for solving the above technical problem is as follows: a cement mixing pile core sample intercepting assembly, comprising:
[0007] A sleeve ring, both ends of the sleeve ring are connected with a drill rod and a drill bit;
[0008] A ring groove is formed on the inner wall of the sleeve ring;
[0009] A plurality of cutter head mechanisms are annularly distributed in the ring groove, and the cutter head mechanism does not exceed the space of the ring groove when it is closed;
[0010] The cutter head mechanism comprises a blade and a limiting rod, the tail of the blade is pivoted in the ring groove, one side of the blade is a cutting edge, and the other side of the blade is hinged with the end of the limiting rod.
[0011] The utility model discloses a sleeve ring with a tool bit mechanism is arranged above the drill bit, when drilling the core sample, the drill rod is normal rotation, and the tool bit mechanism is buried in the ring groove, when the drill bit reaches the specified depth, the drill rod reverses, and the tool bit mechanism is thrown out by centrifugal force, and the blade of tool bit mechanism cuts the core sample, of course, because the core sample is close to the inner wall in the drill rod, the extension of tool bit mechanism is hindered, so the drill rod needs to be repeatedly normal and reverse, until the blade is completely wedged into the core sample, at this moment, the drill rod is lifted, and the core sample is disconnected from the position of the blade wedge, so the core sample of complete length can be obtained, and the extended blade can also prevent the core sample from falling during the lifting of the drill rod.
[0012] Further, the cutting edge is arc-shaped, and the head of the blade is a pointed end.
[0013] The beneficial effects of the present step are as follows: compared with a straight blade, the arc blade has better cutting effect, in addition, the pointed end of the tool bit cooperates with the arc blade to have better drilling and cutting effect, and the recessed position in the middle of the arc blade also facilitates the discharge of cutting waste.
[0014] Further, the ring groove is provided with continuous limiting teeth in the range corresponding to the tail part of the limiting rod, and the tail part of the limiting rod abuts against the limiting teeth.
[0015] The beneficial effects of the present step are as follows: as the angle of the blade extension changes continuously, the limiting rod also protrudes continuously, and the limiting rod can also realize stepping along the limiting teeth.
[0016] Further, a tension spring is arranged between the blade and the limiting rod.
[0017] The beneficial effects of the present step are as follows: the tension spring can shorten the distance between the blade and the limiting rod, and can accelerate the folding speed of the limiting rod and the blade.
[0018] Further, the tail part of the blade is circular, the pivot shaft of the blade is not on the center of the tail part, and the pivot shaft is close to the limiting rod.
[0019] The bottom of the ring groove is also provided with a limiting block matched with the tail part of the blade.
[0020] The beneficial effects of the present step are as follows: the pivot shaft is in the eccentric structure of the tail part of the blade, and in cooperation with the limiting block, the rotation angle of the blade outward can be limited.
[0021] Further, one side or both sides of the ring groove are provided with at least one anti-disengagement groove, the tail part of the limiting rod is provided with a limiting hook, and the limiting hook is matched with the anti-disengagement groove.
[0022] The beneficial effects of the present step are as follows: the anti-disengagement groove can prevent the tail part of the limiting rod from disengaging from the range of the ring groove.
[0023] Further, the connecting mode of the sleeve ring with the drill rod and the drill bit is threaded connection, pin connection, key connection or buckle connection.
[0024] The beneficial effect of the present step is that each connection mode has its own advantages.
[0025] Further, when the connecting mode of the sleeve ring with the drill rod and the drill bit is threaded connection, the surface of the sleeve ring is provided with at least one pair of parallel planes.
[0026] The beneficial effect of the present step is that the planes can facilitate the fixing of the sleeve ring by tools such as wrenches, and facilitate the threaded connection of the sleeve ring with the drill rod and the drill bit.
[0027] The beneficial effect of the present application is:
[0028] 1. The tilt direction of the tool head mechanism of the present application is consistent with the normal drilling direction of the drill rod. Therefore, when the drill rod is normally used for coring, the tool head mechanism is embedded in the annular groove and does not affect the coring. Only when the drill rod reaches the specified depth, the drill rod will be repeatedly reversed, and the tool head mechanism will be gradually thrown out by centrifugal force. In this process, the core sample is gradually cut, the cross section of the cut core sample becomes smaller, and the strength decreases. When the drill rod is lifted, the core sample is more easily separated, and a more complete core sample can be obtained.
[0029] 2. During the lifting of the drill rod, the extended tool head mechanism can also prevent the core sample in the drill rod from sliding downward, thereby maintaining the completeness of the core sample. BRIEF DESCRIPTION OF DRAWINGS
[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0031] Figure 1 A perspective exploded view of the cement mixing pile core sample cutting assembly provided by the present application is provided.
[0032] Figure 2 A perspective view of the sleeve ring in the cement mixing pile core sample cutting assembly provided by the present application is provided.
[0033] Figure 3 An axial cross-sectional schematic view of the sleeve ring in the cement mixing pile core sample cutting assembly provided by the present application in the first embodiment when not working is provided.
[0034] Figure 4 An axial cross-sectional schematic view of the sleeve ring in the cement mixing pile core sample cutting assembly provided by the present application in the first embodiment when working is provided.
[0035] Figure 5 The axial sectional view schematic diagram of the sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment two works;
[0036] Figure 6 The sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment two works; Figure 5 The partial enlarged view of A part in the sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment two works;
[0037] Figure 7 The axial sectional view schematic diagram of the sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment three works;
[0038] Figure 8 The sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment three works; Figure 7 The partial enlarged view of B part in the sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment three works;
[0039] Figure 9 The radial sectional view schematic diagram of the sleeve ring of the cement mixing pile core sample cutting assembly provided by the utility model in embodiment four works;
[0040] Figure 10 The three-dimensional schematic diagram of the blade of the cement mixing pile core sample cutting assembly provided by the utility model;
[0041] Figure 11 The three-dimensional schematic diagram of the limiting rod of the cement mixing pile core sample cutting assembly provided by the utility model.
[0042] Reference signs:
[0043] 1-sleeve ring; 2-drill rod; 3-drill head; 4-blade; 5-limiting rod; 6-limiting tooth; 7-limiting block; 8-tension spring;
[0044] 11-ring groove; 51-limiting hook;
[0045] 111-anti-disengagement groove. DETAILED DESCRIPTION
[0046] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, therefore only serve as examples, and cannot limit the protection scope of the utility model.
[0047] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meanings understood by the technical personnel in the field to which the utility model belongs.
[0048] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0049] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.
[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.
[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0052] Embodiment
[0053] As Figures 1-11 shown, the cement mixing pile core sample cutting assembly provided by the present application comprises:
[0054] The sleeve ring 1 is connected with the drill rod 2 and the drill bit 3 at both ends respectively;
[0055] The annular groove 11 is arranged on the inner wall of the sleeve ring 1;
[0056] A plurality of cutter head mechanisms are annularly and evenly distributed in the ring groove 11, and the cutter head mechanism does not exceed the space of the ring groove 11 when closed.
[0057] The cutter head mechanism comprises a blade 4 and a limiting rod 5, the tail of the blade 4 is pivotally connected in the ring groove 1, one side of the blade 4 is a cutting edge, and the other side of the blade 4 is hingedly connected with the end of the limiting rod 5, generally, the end of the limiting rod 5 is hingedly connected with the middle of the other side of the blade 4, and the hinging modes are various, and in the embodiment, the preferred connection mode is that a gap hole is formed in the other side of the blade 4, the end of the limiting rod 5 extends into the blade 4 and is pivotally connected, but other connection modes such as that the hinging ring is arranged on the other side of the blade 4 and the end of the limiting rod 5 is hingedly connected with the hinging ring are not excluded.
[0058] The sleeve ring 1 with the cutter head mechanism is arranged above the drill bit 3, when the core sample is drilled, the drill rod 2 is forward rotated, the cutter head mechanism is buried in the ring groove, when the drill bit 3 reaches the specified depth, the drill rod 2 is reversely rotated, the cutter head mechanism is thrown out by the centrifugal force, and the blade 4 of the cutter head mechanism cuts the core sample; of course, since the core sample itself closely adheres to the inner wall in the drill rod 2, the extension of the cutter head mechanism is hindered, so the drill rod 2 needs to be repeatedly forward and reversely rotated until the blade 4 is completely wedged into the core sample, at this time, the drill rod 2 is lifted, the core sample is disconnected from the position wedged by the blade 4, the cross-sectional area of the core sample at the position is smaller, the connecting strength is lower, and the core sample is more easily disconnected, so the core sample with the complete length can be obtained, and the extended blade 4 can also prevent the core sample from falling in the lifting process of the drill rod 2. The drill rod 2 is repeatedly forward and reversely rotated, and the cutter head mechanism is also beneficial to discharging the cutting waste.
[0059] Therefore, the application can guarantee that the core sample taking process is not affected by the operation level of the operator, the obtained core sample is complete, and the detection reliability is improved; in addition, the completion rate of single core sample extraction is high, the number of repeated core sample extraction is reduced, and the detection efficiency is improved.
[0060] On the basis of the above technical scheme, the cutting edge is arc-shaped, and the head of the blade 4 is a pointed end.
[0061] Firstly, the arc blade is more suitable for the ring groove 11, when the curvature of the arc blade is suitable for the diameter of the ring groove 11, the blade 4 can be completely hidden in the ring groove 11, and the interference with the core sample is avoided, and the core sample is more beneficial to be drilled; secondly, compared with the straight blade, the arc blade has better cutting effect, in addition, the pointed end of the cutter head cooperates with the arc blade, and has better drilling and cutting effect, and the middle concave position of the arc blade is also beneficial to discharge the cutting waste.
[0062] On the basis of the above technical scheme, the ring groove 11 is provided with continuous limiting teeth 6 in the range corresponding to the tail of the limiting rod 5, and the tail of the limiting rod 5 abuts against the limiting teeth 6.
[0063] The limiting teeth 6 are continuous triangular convex teeth, the side surface of the triangular convex teeth serves as the abutting surface, as the angle of the blade 4 changes, the limiting rod 5 and the blade 4 gradually converge, the limiting rod 5 also continuously protrudes, and the limiting rod 5 can also step along the limiting teeth 6, so that the blade 4 can only gradually protrude and cannot retreat, and the cutting efficiency is ensured.
[0064] On the basis of the above technical scheme, a tension spring 8 is arranged between the blade 4 and the limiting rod 5.
[0065] The tension spring 8 can shorten the distance between the blade 4 and the limiting rod 5, and can accelerate the convergence speed of the limiting rod 5 and the blade 4.
[0066] On the basis of the above technical scheme, the tail part of the blade 4 is circular, the pivot shaft of the blade 4 is not located at the center of the tail part, and the pivot shaft is close to the limiting rod 5.
[0067] The bottom of the ring groove 11 is further provided with a limiting block 7 matched with the tail part of the blade.
[0068] The eccentric structure of the pivot shaft in the tail part of the blade, in combination with the limiting block 7, can limit the rotation angle of the blade 4 outward, so as to ensure that the blade 4 is maintained at a suitable cutting angle.
[0069] On the basis of the above technical scheme, one side or both sides of the ring groove 11 are provided with at least one anti-disengagement groove 111, the tail part of the limiting rod 5 is provided with a limiting hook 51, and the limiting hook 51 is matched with the anti-disengagement groove 111.
[0070] The anti-disengagement groove 111 and the ring groove 11 are matched, and the radial cross-sectional shape formed by the anti-disengagement groove 111 and the ring groove 11 can be L-shaped, T-shaped, or Ω-shaped, or other shapes. The anti-disengagement groove 111 can constrain the limiting hook 51, and can prevent the tail part of the limiting rod 5 from disengaging from the range of the ring groove 11.
[0071] On the basis of the above technical scheme, the connection mode of the sleeve ring 1 and the drill rod 2 and the drill bit 3 is threaded connection, pin connection, key connection, or buckle connection.
[0072] Each connection mode has its own advantages, and the threaded connection has the most convenient and fast installation mode.
[0073] On the basis of the above technical scheme, when the connection mode of the sleeve ring 1 and the drill rod 2 and the drill bit 3 is threaded connection, the surface of the sleeve ring 1 is provided with at least one pair of parallel planes.
[0074] The planes can facilitate the fixing of the sleeve ring 1 by a wrench or the like, and facilitate the threaded connection of the sleeve ring 1 and the drill rod 2 and the drill bit 3.
[0075] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A cement mixing pile core sample taking assembly, characterized in that, The application relates to a drill collar and a drill bit. The drill collar comprises: a collar, two ends of which are connected with a drill rod and a drill bit respectively; a ring groove, which is arranged on the inner wall of the collar; a plurality of cutter head mechanisms, which are arranged in the ring groove in a ring shape and do not exceed the space of the ring groove when closed; 2. The cement mix pile core sample taking assembly according to claim 1, characterized in that, the cutter head mechanism comprises a blade and a limiting rod, the tail of the blade is pivoted in the ring groove, one side of the blade is a cutting edge, and the other side of the blade is hinged with the end of the limiting rod.
3. The cement mix pile core sample taking assembly according to claim 2, wherein, The cutting edge is arc-shaped, and the head of the blade is a pointed end.
4. The cement mix pile core sample taking assembly according to claim 3, wherein, The ring groove is provided with continuous limiting teeth in the range corresponding to the tail of the limiting rod, and the tail of the limiting rod is abutted in the limiting teeth.
5. The cement mix pile core sample taking assembly of claim 1, wherein, A tension spring is arranged between the blade and the limiting rod. The tail of the blade is circular, the pivoting shaft of the blade is not on the center of the tail, and the pivoting shaft is close to the limiting rod; 6. The cement mix pile core sample taking assembly of claim 1, wherein, the bottom of the ring groove is further provided with a limiting block matched with the tail of the blade.
7. The cement mix pile core sample taking assembly of claim 1, wherein, One side or both sides of the ring groove are provided with at least one anti-extrusion groove, the tail of the limiting rod is provided with a limiting hook matched with the anti-extrusion groove.
8. The cement mix pile core sample taking assembly according to claim 7, wherein, The connection mode of the collar with the drill rod and the drill bit is screw connection, pin connection, key connection or buckle connection. When the connection mode of the collar with the drill rod and the drill bit is screw connection, the surface of the collar is provided with at least one pair of parallel planes.