A kind of upper and lower spiral drill rod joint structure for drilling and pipe pile

Abstract

The present invention discloses a joint structure, comprising a rod body and a rod sleeve sleeved on one end of the rod body, a fixing structure is arranged between the rod body and the rod sleeve, the fixing structure comprises a connecting hole, a pin, and a second abutting portion, the connecting hole and the second abutting portion are arranged on the rod body and the rod sleeve respectively, the second abutting portion abuts against the outer wall surface of the pin; the axis of the connecting hole and the axis direction of the rod body are provided with an angle, the connecting hole gradually expands from the inside to the outside, the outer wall surface of the pin abuts against the inner wall surface of the connecting hole; and also comprises a connecting body, the two ends of the connecting body are connected to the pin and the rod sleeve respectively. The pin can fix the rod body and the rod sleeve, the connecting hole gradually expands from the inside to the outside and the outer wall surface of the pin abuts against the inner wall surface of the connecting hole, the same part of the pin is squeezed less as it moves outward, so that the pin can be rotated in and out during disassembly and assembly, and the connecting body can prevent the pin from falling out.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation engineering, and in particular to a drill rod quick connection device. Background Art

[0002] In pile foundation engineering, a drill is used to drill rock and soil. The drill bit is equipped with a pipe pile while drilling. The prestressed high-strength concrete pipe pile is sunk to the bottom of the hole while drilling. The pile end can be sealed by rotary grouting or pouring concrete to form a pile. The outside of the pipe wall can be poured with cement or cement mortar to improve the bearing capacity of the pile. The upper and lower spiral drill rods of conventional pipe piles are fixed with hexagonal joints and pins when connected. When connecting and separating the drill rods, workers need to use vibration hammers and other methods to insert or pull out the pins. After the spiral drill rod is used for a long time, it is difficult to insert and pull out the pins. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to provide an upper and lower spiral drill rod joint structure for a pipe pile while drilling to solve the problem of difficulty in disassembling and assembling the pins when connecting and separating the drill rods.

[0004] To achieve the above object, the present invention is implemented according to the following technical solutions:

[0005] A structure of upper and lower spiral drill rod joints for a drilling-while-pipe pile comprises a rod body and a rod sleeve sleeved on one end of the rod body, a fixing structure is provided between the rod body and the rod sleeve, the fixing structure comprises a connecting hole, a pin, and a second abutting portion, the connecting hole and the second abutting portion are respectively provided on the rod body and the rod sleeve, the second abutting portion abuts against the outer wall surface of the pin; an axis of the connecting hole is provided with an angle with an axis direction of the rod body, the connecting hole gradually expands from the inside to the outside, and the outer wall surface of the pin abuts against the inner wall surface of the connecting hole; a connecting body is also provided, and two ends of the connecting body are respectively connected to the pin and the rod sleeve.

[0006] Preferably, the rod body and the pin are both made of magnetic material, the connector is configured as a magnetic switch, and the connector is respectively connected to the rod body and the pin.

[0007] Preferably, the connector is configured as an annular structure, and the connector is sleeved on the pin; an end of the pin away from the rod body is provided with a third abutment portion for preventing the connector from falling outwards.

[0008] Preferably, the third abutting portion is arranged on the end surface of the pin, a striking surface for striking is provided on the third abutting portion, and a first gap is provided between the third abutting portion and the connecting body.

[0009] Preferably, a second gap is provided between the inner annular surface of the connector and the outer wall surface of the rod body.

[0010] Preferably, a recess is provided on the inner end surface of the pin.

[0011] Preferably, the connecting hole is arranged on the side wall surface of the rod body, the second abutting portion is arranged as a through hole penetrating the side wall of the rod sleeve, the hole wall of the through hole abuts against the pin; and the axis of the connecting hole is arranged along the radial direction of the rod body.

[0012] Preferably, at least two fixing structures are provided between the rod body and the rod sleeve, and the at least two fixing structures are evenly distributed along the circumference of the rod body.

[0013] Preferably, at least two fixing structures are provided between the rod body and the rod sleeve, and the at least two fixing structures are evenly distributed along the circumference of the rod body. A third gap is provided between the inner end surface of the pin and the axis of the rod body.

[0014] Preferably, an abutment surface is provided in the through hole, the abutment surface abuts against the connecting body, and the outer wall surface of the connecting body abuts against the hole wall of the through hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The pin can fix the rod body and the rod sleeve, the connecting hole gradually expands from the inside to the outside and the outer wall surface of the pin abuts against the inner wall surface of the connecting hole. The further outward the same part of the pin is, the less it will be squeezed, which makes it easier to rotate the pin in and out during disassembly and assembly, and the connecting body can prevent the pin from falling out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a front view of an embodiment of the joint structure of the present invention.

[0019] Figure 2 It is an exploded view of an embodiment of the joint structure of the present invention.

[0020] Figure 3 for Figure 1 A partial enlarged view of position A in the middle.

[0021] Figure 4 Schematic diagram of the pin and the connector in the joint structure embodiment of the present invention.

[0022] in:

[0023] 1-rod body, 12-connecting hole, 2-rod sleeve, 22-through hole, 221-abutment surface, 3-pin, 31-third abutment portion, 311-striking surface, 32-recess, 4-connector. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] Example 1

[0027] A vertical spiral drill rod joint structure for a pile while drilling includes a rod body 1 and a rod sleeve 2 sleeved on one end of the rod body 1, a fixing structure is provided between the rod body 1 and the rod sleeve 2, the fixing structure includes a connecting hole 12, a pin 3, and a second abutting portion, the connecting hole 12 and the second abutting portion are respectively provided on the rod body 1 and the rod sleeve 2, and the second abutting portion abuts against the outer wall surface of the pin 3; an angle is provided between the axis of the connecting hole 12 and the axis direction of the rod body 1, the connecting hole 12 gradually expands from the inside to the outside, and the outer wall surface of the pin 3 abuts against the inner wall surface of the connecting hole 12; and a connecting body 4 is also provided, and the two ends of the connecting body 4 are respectively connected to the pin 3 and the rod sleeve 2. The rod body 1 and the rod sleeve 2 can be connected first by conventional joint forms, such as a hexagonal joint, and then the vertical spiral drill rod joint structure for the pile while drilling with the present solution is added. In this embodiment, the connection hole 12 and the pin 3 are both set to a truncated cone structure with a slope of 5 to 10 degrees, and the outer truncated cone surface of the pin 3 abuts against the inner wall surface of the connection hole 12. The connector 4 can achieve the connection between the pin 3 and the rod sleeve 2, including conventional wire bundling and other methods. The axis of the connection hole 12 is set at an angle with the axis direction of the rod body 1, so that the connection hole 12 can be used for axial and circumferential fixation with the pin 3. The angle in this embodiment is set to 90 degrees.

[0028] The rod body 1 and the pin 3 are both made of magnetic materials, and the connector 4 is set as a magnetic switch component, which is connected to the rod body 1 and the pin 3 respectively. Magnetic materials refer to existing materials containing iron, cobalt, nickel and other components, such as steel, especially manganese steel, manganese vanadium steel, manganese molybdenum steel and the like commonly used in drill rods. Magnetic switch components refer to components that can control the presence or absence of magnetism through switches, including magnetic bases, electromagnets and the like. The magnetic base refers to the magnet inside that is rotated by turning the handle. When the two poles of the magnet (N or S) are in the up and down direction, that is, when the N or S pole of the magnet is facing the base of the soft magnetic material, it is magnetized. There is strong magnetism in this direction, so it can be used to attract the surface of the magnetic material; when the two poles of the magnet are in the horizontal direction, and when the middle of the NS is facing the base of the soft magnetic material (the middle of the long strip magnet has only very small magnetism, which can be ignored), it will not be magnetized, so at this time there is almost no magnetic force on the base, and it can be easily removed from the surface of magnetic materials such as steel. An electromagnet is a device composed of a magnetic core and a coil, which can generate a magnetic field when current flows through the coil. The connector 4 can be further configured to be in the form of a magnetic table seat. The rod body 1 and the pin 3 are made of magnetic materials, and the connector 4 is configured as a magnetic switch. When the connector 4 generates a magnetic field, it can attract the rod body 1 and the pin 3 so that the rod body 1 and the pin 3 tend to approach each other, thereby ensuring the reliability of the upper and lower spiral drill rod joint structure of the drilling pile.

[0029] The connector 4 is provided as an annular structure, and the connector 4 is sleeved on the pin 3; the end of the pin 3 away from the rod body 1 is provided with a third abutment portion 31 for preventing the connector 4 from falling outward. The sleeve includes the form in which the inner annular surface of the connector 4 contacts and does not contact the pin 3, that is, the pin 3 passes through the inner annular surface of the connector 4. The third abutment portion 31 can prevent the connector 4 from falling off.

[0030] The third abutting portion 31 is disposed on the end surface of the pin 3, and a striking surface 311 for striking is disposed on the third abutting portion 31, and a first gap is disposed between the third abutting portion 31 and the connecting body 4. The striking surface 311 can be struck when the pin 3 is installed to ensure that the pin 3 is interference-connected with the connecting hole 12. The first gap is shown as H1 in the accompanying drawings, and the first gap can prevent the impact force received by the third abutting portion 31 from being transmitted to the connecting body 4, thereby preventing the connecting body 4 from being damaged by striking or losing its magnetism by striking.

[0031] A second gap is provided between the inner annular surface of the connector 4 and the outer wall surface of the rod body 1. The second gap is shown as H2 in the figure. By providing the second gap, when the pin 3 is further extended into the connecting hole 12 for further interference connection, the obstruction of the connector 4 to the pin 3 can be reduced.

[0032] At least two fixing structures are provided between the rod body 1 and the rod sleeve 2, and the at least two fixing structures are evenly distributed along the circumference of the rod body 1. In this embodiment, two fixing structures are provided so that the rod body 1 is more evenly acted upon by the pin 3. The at least two fixing structures effectively prevent the pin 3 from being too long while ensuring the connection strength, further reducing the difficulty of disassembling and assembling the pin 3.

[0033] Example 2

[0034] Different from the first embodiment, a recess 32 is provided on the inner end surface of the pin 3. The recess 32 can be set in the form of a pit, a drilled hole, etc. By setting the recess 32, when the side surface of the end of the pin 3 is in interference connection with the connecting hole 12, the end of the pin 3 provided with the recess 32 can provide a certain structural elasticity to ensure the effect of the interference connection; in addition, when the end surface of the pin 3 is required to abut against the bottom surface of the connecting hole 12, the recess 32 can accommodate the protrusion on the bottom surface of the connecting hole 12, ensuring the effective contact between the end surface of the pin 3 and the ground of the connecting hole 12.

[0035] Example 3

[0036] Different from the embodiment 1, a contact surface 221 is provided in the through hole 22, the contact surface 221 contacts the connecting body 4, and the outer wall surface of the connecting body 4 contacts the hole wall of the through hole 22. The contact surface 221 is provided in the through hole 22, and the outer wall surface of the connecting body 4 contacts the hole wall of the through hole, which effectively ensures that the connection between the connecting body 4 and the rod sleeve 2 is fixed during the rotation of the rod body 1, and avoids the failure of the connection between the connecting body 4 and the rod body 1 and the rod sleeve 2.

[0037] Example 4

[0038] Different from the third embodiment, at least two fixing structures are provided between the rod body 1 and the rod sleeve 2, and the at least two fixing structures are evenly distributed along the circumference of the rod body 1, and a third gap is provided between the inner end surface of the pin 3 and the axis of the rod body 1. The third gap is shown as H3 in the figure. By providing the third gap, it is avoided that at least two pins 3 interfere with and collide with each other on the inner side during installation; when the third gap is applied to a solid drill rod, that is, when the rod body 1 is a solid structure, the third gap can also retain the central part of the solid structure, and ensure the strength of the rod body 1 after providing at least two connecting holes 12.

[0039] Example 5

[0040] Different from the third embodiment, the connection hole 12 is arranged on the side wall of the rod body 1, the second abutting portion is arranged as a through hole 22 penetrating the side wall of the rod sleeve 2, and the hole wall of the through hole 22 abuts against the pin 3; the axis of the connection hole 12 is arranged along the radial direction of the rod body 1. Since the connection hole 12 gradually expands from the inside to the outside, the axis of the connection hole 12 is arranged along the radial direction of the rod body 1, so that the thickness of the solid part of the rod body 1 on both sides of the connection hole 12 is equal, reducing the possibility of local damage to the rod body 1.

[0041] Example 6

[0042] A structure of upper and lower spiral drill rod joints for drilling and pipe piles, comprising a rod body 1 and a rod sleeve 2 sleeved on one end of the rod body 1, wherein the rod body 1, the rod sleeve 2 and the pin 3 are made of existing materials containing iron, cobalt, nickel and other components, such as steel, and the rod body 1 can be made of manganese steel, manganese vanadium steel, manganese molybdenum steel and the like commonly used in drill rods. A fixing structure is provided between the rod body 1 and the rod sleeve 2, and the fixing structure comprises a connecting hole 12, a pin 3, and a through hole 22 penetrating the side wall of the rod sleeve 2. The connecting hole 12 is provided on the rod body 1, and the through hole 22 is provided on the rod sleeve 2. The hole wall of the through hole 22 abuts against the pin 3, and the axis of the connecting hole 12 is provided along the radial direction of the rod body 1. The angle between the axis of the connecting hole 12 and the axis direction of the rod body 1 is set to 90 degrees. The connecting hole 12 and the pin 3 are both configured as a truncated cone structure with a slope of 5 to 10 degrees, and the outer wall surface of the pin 3 abuts against the inner wall surface of the connecting hole 12; the connecting body 4 is configured as a magnetic table seat, and the two ends of the connecting body 4 are respectively connected to the pin 3 and the rod sleeve 2. The rod sleeve 2 is configured to be made of a magnetic material, which can stably fix the connecting body 4 on the rod sleeve 2. The rod body 1 and the rod sleeve 2 can be connected first by a conventional joint form, such as a hexagonal joint, and then the upper and lower spiral drill rod joint structure of the drilling and pipe pile of this scheme is added. The outer truncated cone surface of the pin 3 abuts against the inner wall surface of the connecting hole 12.

[0043] The connector 4 is configured as an annular structure, and the connector 4 is sleeved on the pin 3; a second gap is configured between the inner annular surface of the connector 4 and the outer wall surface of the rod body 1, and the second gap is indicated as H2 in the figure.

[0044] The third abutting portion 31 is arranged on the end surface of the pin 3 , and a striking surface 311 for striking is arranged on the third abutting portion 31 . A first gap is arranged between the third abutting portion 31 and the connecting body 4 , and the first gap is shown as H1 in the figure.

[0045] A recess 32 is provided on the inner end surface of the pin 3 , and the recess 32 is arranged in the form of a drilled hole.

[0046] An abutting surface 221 is provided in the through hole 22 . The abutting surface 221 abuts against the connecting body 4 . The outer wall surface of the connecting body 4 abuts against the hole wall of the through hole 22 .

[0047] Two fixing structures are provided between the rod body 1 and the rod sleeve 2, and the two fixing structures are evenly distributed along the circumference of the rod body 1. A third gap is provided between the inner end surface of the pin 3 and the axis of the rod body 1, and the third gap is shown as H3 in the figure.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An upper and lower spiral drill rod joint structure for drilling and pipe pile, characterized in that: The invention also comprises a rod body and a rod sleeve sleeved on one end of the rod body, a fixing structure is provided between the rod body and the rod sleeve, the fixing structure comprises a connecting hole, a pin, and a second abutting portion, the connecting hole and the second abutting portion are respectively arranged on the rod body and the rod sleeve, and the second abutting portion abuts against the outer wall surface of the pin; an axis of the connecting hole and an axis direction of the rod body are provided with an included angle, the connecting hole gradually expands from the inside to the outside, the outer wall surface of the pin abuts against the inner wall surface of the connecting hole, and the connecting hole and the pin are both arranged as a truncated cone structure with a slope of 5 to 10 degrees; it also comprises a connecting body, the two ends of the connecting body are respectively connected to the pin and the rod sleeve; the rod body and the pin are both made of magnetic material, the connecting body is arranged as a magnetic table seat, and the connecting body is respectively connected to the rod body and the pin; the connecting body is arranged as an annular structure, and the connecting body is sleeved on the pin; an end of the pin away from the rod body is provided with a third abutting portion for preventing the connecting body from falling off outward The third abutting portion is arranged on the end surface of the pin, and the third abutting portion is provided with a knocking surface for knocking, and a first gap is provided between the third abutting portion and the connecting body; a recess is provided on the inner end surface of the pin, and the end surface of the pin abuts against the bottom surface of the hole of the connecting hole, and the recess can accommodate the protrusion on the bottom of the hole of the connecting hole; a second gap is provided between the inner annular surface of the connecting body and the outer wall surface of the rod body; the connecting hole is arranged on the side wall surface of the rod body, and the second abutting portion is arranged as a through hole penetrating the side wall of the rod sleeve, and the hole wall of the through hole abuts against the pin; the axis of the connecting hole is arranged along the radial direction of the rod body; an abutting surface is arranged in the through hole, and the abutting surface abuts against the connecting body, and the outer wall surface of the connecting body abuts against the hole wall of the through hole; at least two of the fixing structures are provided between the rod body and the rod sleeve, and the at least two fixing structures are evenly arranged along the circumference of the rod body, and a third gap is provided between the inner end surface of the pin and the axis of the rod body.

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