阅读说明：本技术 一种钻杆夹持器 (Drill rod holder ) 是由 周兆弟 于 2019-03-20 设计创作，主要内容包括：本发明提供了一种钻杆夹持器,包括：夹持机构、驱动夹持机构抓夹钻杆端部的竖向驱动机构、以及顶部用于安装夹持机构和竖向驱动机构的安装板；其中,所述夹持机构包含：两组以上周向环绕竖向驱动机构间隔分布的夹爪,和安装在所述竖向驱动机构活动端可用于定位钻杆端部的定位块。本发明能够保证钻杆被夹持时受力均匀并且通过定位块使钻杆能够调整位置,保证夹持的精准。(The present invention provides a drill rod holder comprising: the device comprises a clamping mechanism, a vertical driving mechanism for driving the clamping mechanism to clamp the end part of a drill rod, and a mounting plate, wherein the top of the mounting plate is used for mounting the clamping mechanism and the vertical driving mechanism; wherein, the fixture includes: more than two groups of clamping jaws are circumferentially distributed at intervals around the vertical driving mechanism, and a positioning block is arranged at the movable end of the vertical driving mechanism and can be used for positioning the end part of the drill rod. The invention can ensure that the stress is uniform when the drill rod is clamped, and the position of the drill rod can be adjusted through the positioning block, thereby ensuring the precision of clamping.)

1. A drill rod holder, comprising: the device comprises a clamping mechanism (3), a vertical driving mechanism (2) for driving the clamping mechanism (3) to clamp the end part of a drill rod (5), and a mounting plate (1) of which the top is used for mounting the clamping mechanism (3) and the vertical driving mechanism (2);

wherein the clamping mechanism (3) comprises: clamping jaw (31) of vertical actuating mechanism (2) interval distribution is encircleed to circumference more than two sets of, and installs vertical actuating mechanism (2) expansion end can be used to fix a position locating piece (4) of drilling rod (5) tip, the distance of locating piece (4) least significant end to mounting panel (1) is less than the distance of clamping jaw (4) least significant end to mounting panel (1).

2. A drill rod holder as claimed in claim 1, wherein the positioning block (4) extends in different radial directions away from the mounting plate (1) by more than two connecting arms (41), and each connecting arm (41) corresponds to a respective clamping jaw (31);

the clamping jaw (31) comprises a hinged arm (311) and a clamping arm (312), wherein two ends of the hinged arm (311) are respectively hinged with one end part of the clamping arm (312) and a hinged seat (11) of the mounting plate (1), a suspension end of the connecting arm (41) is hinged with the middle part of the clamping arm (312), and when the vertical driving mechanism (2) works, the clamping arm (312) deflects up and down around the hinged part of the clamping arm and the connecting arm (41).

3. The drill rod holder as recited in claim 2, wherein the hinge arm (311), the clamping arm (312) and the connecting arm (41) are all elongated, wherein both ends of the hinge arm (311) are provided with grooves (311a) with two sides passing through, and the hinge base (11) on the mounting plate (1) and one end of the clamping arm (312) are respectively positioned in the grooves (311a) at both ends of the hinge arm (311) and are hinged through a pivot;

the suspension end of the connecting arm (41) is also provided with a groove (41a) with two through sides, and the middle part of the clamping arm (312) is positioned in the groove (41a) and is hinged through a pivot;

the clamping arm (312) is provided with a clamping surface (312a) which is concave in the thickness direction from the middle part far away from the hinged arm (311).

4. The drill rod holder as recited in claim 3, wherein a distance from a hinge point P1 of the hinge arm (311) to the mounting plate (1) to a hinge point P2 of the hinge arm (311) to the clamping arm (312) is L1, a distance from a hinge point P2 of the hinge arm (311) to the clamping arm (312) to a hinge point P3 of the connecting arm (41) to the clamping arm (312) is L2, and a distance from a hinge point P1 of the hinge arm (311) to the mounting plate (1) to a hinge point P3 of the connecting arm (41) to the clamping arm (312) is L3;

when the clamping mechanism (3) effectively clamps the end of the drill rod (5), L2+ L3> L1 and L1-L2< L3;

when the clamping mechanism (3) is disengaged from the end of the drill rod (5), L1+ L2> L3 and L3-L2< L1.

5. A drill rod holder as recited in claim 1, wherein the bottom of the locator block (4) is formed with a tapered guide cavity (44) that mates with the upper end of the drill rod (5).

6. A drill rod holder as in claim 5, wherein the locating block (4) has a flow passage (42) therein, the outlet of the flow passage (42) communicating with the tapered guide cavity (44), and the inlet of the flow passage (42) being exposed at the side wall or the top of the locating block (4).

7. Drill rod holder according to claim 6, c h a r a c t e r i z e d in that a sealing chamber (43) is formed between the conical guide chamber (44) and the outlet of the flow channel (42).

8. Drill rod holder according to claim 6, c h a r a c t e r i z e d in that the inlet of the flow channel (42) and the connecting arm (41) are offset in the circumferential direction of the vertical drive mechanism (2).

9. The drill rod holder as recited in claim 1, wherein the vertical drive mechanism (2) comprises a cylinder (21), a cylinder body of the cylinder (21) is vertically mounted at a bottom of the mounting plate (1), and the positioning block (4) is mounted at a piston rod end of the cylinder (21);

alternatively, the cylinder (21) is replaced by a hydraulic cylinder.

10. A drill rod holder as recited in claim 9, wherein the vertical drive mechanism (2) further comprises two or more guide rods (22), the guide rods (22) being circumferentially spaced around the cylinder (21).

Technical Field

The invention relates to the field of engineering mechanical equipment, in particular to a drill rod holder.

Background

The resistance of stratum soil is needed to be overcome when the pipe pile is sunk into the stratum, and the conventional pile sinking method mainly comprises the following modes: firstly, hammering method: the equipment adopts a diesel hammer, a hydraulic hammer and the like to directly hammer the upper top of the tubular pile by using a hammer head. Secondly, static pile pressing method: the equipment adopts a static pile press, and utilizes the self weight of the pile press to balance the resistance of the stratum to the pile, so that the pipe pile is sunk into the stratum. The two methods greatly damage the pipe pile in the construction process, such as cracking and breaking, are difficult to control the verticality, and have soil squeezing phenomenon, thereby causing certain influence on peripheral soil layers and buildings. Thirdly, a hole-forming and pile-inserting method: generally, a long spiral drilling machine and other equipment are adopted to firstly take soil in a stratum and then a pipe pile is inserted after a hole is formed. Due to the fact that some stratums are easy to collapse, holes are difficult to form by the method, and the pipe pile cannot be inserted.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a drill rod holder capable of ensuring uniform stress when a drill rod is held.

In order to achieve the purpose, the invention adopts the following technical scheme:

a drill rod holder, comprising: the device comprises a clamping mechanism, a vertical driving mechanism for driving the clamping mechanism to clamp the end part of a drill rod, and a mounting plate, wherein the top of the mounting plate is used for mounting the clamping mechanism and the vertical driving mechanism;

wherein, the fixture includes: the clamping jaw that vertical actuating mechanism interval distribution was surrounded to circumference more than two sets of and install the locating piece that vertical actuating mechanism expansion end can be used to fix a position the drilling rod tip, the distance of locating piece least significant end to mounting panel is less than the distance of clamping jaw least significant end to mounting panel.

Preferably, the positioning block extends out of more than two connecting arms along different radial directions away from the mounting plate, and each connecting arm corresponds to one clamping jaw;

the clamping jaw comprises a hinged arm and a clamping arm, wherein two ends of the hinged arm are respectively hinged with one end of the clamping arm and a hinged seat of the mounting plate, a suspension end of the connecting arm is hinged with the middle part of the clamping arm, and when the vertical driving mechanism works, the clamping arm rotates up and down around the hinged part of the clamping arm and the connecting arm.

Preferably, the hinged arm, the clamping arm and the connecting arm are all in a strip shape, two ends of the hinged arm are provided with grooves with two through sides, and a hinged seat on the mounting plate and one end of the clamping arm are respectively positioned in the grooves at two ends of the hinged arm and hinged through a pivot;

the suspension end of the connecting arm is also provided with a groove with two through sides, and the middle part of the clamping arm is positioned in the groove and is hinged through a pivot;

the middle part of the clamping arm is far away from the hinged arm to form a clamping surface which is concave in the thickness direction.

Preferably, the distance from the hinge arm and mounting plate hinge point P1 to the hinge arm and clamping arm hinge point P2 is L1, the distance from the hinge arm and clamping arm hinge point P2 to the connecting arm and clamping arm hinge point P3 is L2, and the distance from the hinge arm and mounting plate hinge point P1 to the connecting arm and clamping arm hinge point P3 is L3;

when the gripping mechanism is effective to grip the end of the drill rod, L2+ L3> L1 and L1-L2< L3;

when the gripping mechanism is disengaged from the end of the drill rod, L1+ L2> L3 and L3-L2< L1.

Preferably, the bottom of the positioning block is provided with a conical guide cavity matched with the upper end of the drill rod.

Preferably, a flow passage is arranged in the positioning block, an outlet of the flow passage is communicated with the conical guide cavity, and an inlet of the flow passage is exposed out of the side wall or the top of the positioning block.

Preferably, a sealing cavity is formed between the conical guide cavity and the outlet of the flow passage.

Preferably, the inlet of the flow channel and the connecting arm are arranged offset in the circumferential direction of the vertical drive.

Preferably, the vertical driving mechanism comprises a cylinder, a cylinder body of the cylinder is vertically installed at the bottom of the installation plate, and the positioning block is installed at the piston rod end of the cylinder;

alternatively, the cylinder is replaced by a hydraulic cylinder.

Preferably, the vertical driving mechanism further comprises more than two guide rods, and the guide rods are circumferentially distributed around the cylinder at intervals.

The invention has the beneficial effects that:

(1) the clamping mechanism and the vertical driving mechanism are connected into an integral structure through the mounting plate, so that the clamping mechanism can grab and clamp the end part of the drill rod under the driving of the vertical driving mechanism.

(2) The clamping jaws are circumferentially distributed around the vertical driving mechanisms at intervals, so that the clamping jaws can be driven to synchronously clamp the end part of the drill rod only through one vertical driving mechanism, the cost can be saved, the synchronism of the clamping jaws is high, the end part of the drill rod can be guaranteed to be subjected to uniform clamping force when the end part of the drill rod is clamped by the clamping jaws, and the drilling verticality requirement of the drill rod is guaranteed.

(3) The positioning block is arranged at the movable end of the vertical driving mechanism, so that the position of the clamping mechanism can be automatically adjusted under the condition that the clamping mechanism is not aligned with the drill rod in position, and the manual adjustment time is saved.

Drawings

FIG. 1 is a schematic view of a preferred drill rod holder configuration in an embodiment of the present invention;

FIG. 2 is a front view of a preferred drill rod holder of an embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view of the positioning block of the present invention;

FIG. 5 is a view showing a state of use of the gripping mechanism of the present invention gripping an end of a drill pipe;

FIG. 6 is a schematic view of the construction of the hinge arm of the present invention;

FIG. 7 is a schematic view of a clamp arm according to the present invention;

fig. 8 is a schematic structural view of a connecting arm of the present invention.

Detailed Description

In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 5, the present embodiment provides a drill rod holder disposed on a machine frame of a pile machine, which is not shown in the drawings, the drill rod holder including: the device comprises a clamping mechanism 3, a vertical driving mechanism 2 for driving the clamping mechanism 3 to clamp the end part of a drill rod 5, and a mounting plate 1 with the top used for mounting the clamping mechanism 3 and the vertical driving mechanism 2; wherein the clamping mechanism 3 comprises: 2 interval distribution's of vertical actuating mechanism clamping jaw 31 is encircleed to circumference more than two sets of and installs 2 expansion ends of vertical actuating mechanism can be used to the locating piece 4 of 5 tip of location drilling rods, 4 least significant ends of locating piece to the distance of mounting panel 1 are less than 4 least significant ends of clamping jaw to the distance of mounting panel 1. The mounting plate 1 can be moved back and forth in the drilling direction by means of a slide device not shown in the figures.

In the above structure, preferably 4 sets of the gripping jaws 31 are equally spaced circumferentially around the vertical drive mechanism 2. The plurality of clamping jaws 31 can be driven to synchronously clamp the end part of the drill rod 5 only through one vertical driving mechanism 2, the number of the vertical driving mechanisms 2 can be saved, the purpose of saving cost is achieved, the synchronism of each clamping jaw 31 is high, and the end part of the drill rod 5 can be ensured to be subjected to uniform clamping force when the clamping jaws 31 clamp the end part of the drill rod 5. Meanwhile, the positioning block 4 is arranged to ensure that the positioning block 4 can automatically adjust the position of the drill rod in any radial direction under the action of interaction force when the clamping mechanism 3 clamps the drill rod 5 under the condition that the clamping mechanism 3 and the drill rod 5 are not aligned in position, so that the manual adjustment time is saved.

As shown in fig. 2, specifically, the positioning block 4 extends two or more connecting arms 41 in different radial directions away from the mounting plate 1, and the distance between the connecting arms 41 is larger the farther away from the positioning block 4. And each connecting arm 41 corresponds to one clamping jaw 31.

More specifically, the clamping jaw 31 includes a hinged arm 311 and a clamping arm 312, wherein two ends of the hinged arm 311 are respectively hinged to one end of the clamping arm 312 and the hinged seat 11 of the mounting plate 1, and a hanging end (i.e. an end far away from the positioning block 4) of the connecting arm 41 is hinged to a middle portion of the clamping arm 312, and when the vertical driving mechanism 2 operates, the clamping arm 312 deflects up and down around a hinged position of the connecting arm 41.

In the above structure, it is preferable that the hinge base 11 is provided at the bottom of the mounting plate 1. When the movable end of the vertical driving mechanism 2 moves upwards, the positioning block 4 connected to the movable end of the vertical driving mechanism is driven to move together, and the connecting arm 41 is driven to move upwards synchronously, because the two ends of the hinged arm 311 are respectively hinged to one end of the hinged support 11 and one end of the clamping arm 312, the connecting arm 41 is hinged to the middle part of the clamping arm 312, when the connecting arm 41 moves upwards, the hinged arm 311 deflects outwards around the hinged position of the hinged arm and the hinged support 11, and simultaneously, the clamping arm 41 deflects upwards around the hinged position of the connecting arm 41, when the movable end of the vertical driving mechanism 2 moves upwards to reach a certain stroke, the distance between the clamping arms 312 which are symmetrical to each other is smaller than the size of the end of the drill rod 5, the end of the clamping arm 312 is abutted against the end of the drill rod 5, and because the clamping jaws 31 are uniformly distributed at intervals around the vertical driving mechanism 2 in the, the gripper arms 312 grip the end of the drill rod 5 radially.

Similarly, when the movable end of the vertical driving mechanism 2 moves downward, the hinge arm 311 rotates inward around the hinge joint with the hinge base 11, and simultaneously, the clamping arms 312 rotate downward around the hinge joint with the connecting arm 41, and when the movable end of the vertical driving mechanism 2 moves downward to reach a certain stroke, the distance between the symmetrical clamping arms 312 is greater than the size of the end of the drill rod 5, and then the clamping arms 312 can release the end of the drill rod 5. (the direction of the clamping surface of the clamping arm 312 far away from the positioning block 4 is taken as the outer side, and the direction of the clamping surface close to the positioning block 4 is taken as the inner side.)

As shown in fig. 6 to 8, further, the hinged arm 311, the clamping arm 312 and the connecting arm 41 are all in a long strip shape, wherein two ends of the hinged arm 311 are provided with two through recesses 311a, and one end of the hinged seat 11 and one end of the clamping arm 312 on the mounting plate 1 are respectively located in the recesses 311a at two ends of the hinged arm 311 and are hinged through a pivot; the suspension end of the connecting arm 41 is also provided with a groove 41a with two through sides, and the middle part of the clamping arm is positioned in the groove 41a and is hinged through a pivot; the grip arm 312 has a grip surface 312a recessed in the thickness direction from the middle away from the hinge arm 311.

In the above structure, the two ends of the hinge arm 311 are provided with the grooves 311a, which can ensure that when the hinge arm 311 is hinged with the hinge base 11 and the clamping arm 312, the single side of the hinge arm 311 is prevented from being stressed, thereby preventing the hinge arm 311 from being stressed by torque force, reducing fatigue damage to the hinge arm 311, and when the hinge arm is connected with a pivot, the hinge arm 311 has two supporting points, so that the bearing force of the pivot is larger;

similarly, the provision of the recess 41a at the overhanging end of the connecting arm 41 can prevent the connecting arm 41 from being stressed on one side, thereby preventing the connecting arm 41 from being stressed by torque, reducing fatigue damage to the connecting arm 41, and when pivotally connecting, having two supporting points, making the bearing capacity of the pivot greater.

Meanwhile, when the movable end of the vertical driving mechanism 2 moves upwards, the hinge arm 311 deflects upwards around the hinged position of the hinge arm 311 and the hinge base 11, and in order to avoid that the hinge arm 311 collides with the hinge base 11 when the hinge arm 311 deflects to a certain position, the hinge arm 311 cannot deflect upwards continuously to cause damage to parts, so that the depth of the groove 311a at two ends of the hinge arm 311 needs to satisfy the following conditions: when the movable end of the vertical driving mechanism 2 reaches the minimum stroke or the maximum stroke, the hinge base 11 and the clamping arm 312 can be positioned in the grooves 311a at the two ends of the hinge arm 311 and can not be abutted against the hinge arm 311.

Likewise, the depth of the recess 41a of the connecting arm 41 is also required to satisfy the following condition: when the movable end of the vertical driving mechanism 2 reaches the minimum stroke or the maximum stroke, the clamping arm 312 can be located in the groove 41a and will not abut against the clamping arm 312.

The grip arm 312 has a grip surface 312a recessed in the thickness direction from the middle portion away from the hinge arm 311. Because the clamping arm 312 is when the tip of the clamping rod 5, if the clamping arm 312 does not have the clamping surface 312a, when the stroke that the movable end of the vertical driving mechanism 2 contracts upwards is too small, the clamping arm 312 cannot control whether the tip of the clamping arm 312 collides with the drill rod 5, which easily causes the damage of the drill rod, when the clamping arm 312 has the clamping surface 312a, the tip of the clamping arm 312 is too close to the drill rod 5, the tip of the drill rod 5 can be located at the smooth part of the clamping arm 312, and the drill rod 5 can slide down to the clamping surface 312a of the clamping arm 312 under the action of its own gravity, thereby avoiding the tip of the clamping arm 312 colliding with the drill rod.

As shown in fig. 2, the distance from the hinge point P1 between the hinge arm 311 and the mounting plate 1 to the hinge point P2 between the hinge arm 311 and the clip arm 312 is L1, the distance from the hinge point P2 between the hinge arm 311 and the clip arm 312 to the hinge point P3 between the connecting arm 41 and the clip arm 312 is L2, and the distance from the hinge point P1 between the hinge arm 311 and the mounting plate 1 to the hinge point P3 between the connecting arm 41 and the clip arm 312 is L3; in this embodiment, when the gripping mechanism 3 is effective to grip the end of the drill rod 5, L2+ L3> L1 and L1-L2< L3;

when the gripping mechanism 3 is disengaged from the end of the drill rod 5, L1+ L2> L3 and L3-L2< L1. The vertical driving mechanism 2 is ensured that when the clamping mechanism 3 is driven to clamp the end of the drill rod 5 or release the end of the drill rod 5, the P1, the P2 and the P3 are not blocked due to the fact that the vertical driving mechanism is located on the same straight line to cause the dead center position of operation, and the vertical driving mechanism needs to be triangular.

As shown in fig. 3 and 4, the drill rod 5 has an axially convex conical end surface, a conical guide cavity 44 matching with the conical end surface of the upper end of the drill rod 5 is formed at the bottom of the positioning block 4, and the aperture of the conical guide cavity 44 is gradually reduced from bottom to top.

Set up toper direction chamber 44 in the bottom of locating piece 4 and can be when fixture 3 effectively grabs the clamp drilling rod 5 tip, the tip of drilling rod 5 can be wrapped up by toper direction chamber 44, can play the effect of protection drilling rod 5 tip, and when fixture 3 centre gripping drilling rod 5, when fixing a position inaccurate condition between drilling rod 5 and the locating piece 4, the upper end of drilling rod 5 and the conical surface contact of toper direction chamber 44, can produce the interact power between conical surface and the drilling rod 5, thereby impel drilling rod 5 tip accurate slip in toper direction chamber 44, ensure that drilling rod 5 can be by the accurate centre gripping of fixture 3.

Furthermore, because the drill rod is preferably a slurry conveying drill rod with a slurry conveying pipeline in the embodiment, a flow passage 42 is arranged in the positioning block 4, an outlet of the flow passage 42 is communicated with a conical guide cavity 44, and an inlet of the flow passage 42 is exposed on the side wall or the top of the positioning block 4.

In the above structure, the positioning block 4 not only has a positioning guide function, but also can be connected with a slurry conveying pipe at the inlet of the flow passage 42 under the condition that the end part of the drill rod 5 is positioned in the conical guide cavity 44, and can convey slurry into the slurry conveying passage in the drill rod 5 through the flow passage 42 or discharge the slurry generated during the operation of the drill rod 5 from the underground.

In order to ensure that cement slurry does not leak from the connection between the tapered guide cavity 44 and the slurry inlet at the end of the drill rod 5 when the cement slurry is conveyed, a sealing cavity 43 is formed between the tapered guide cavity 44 and the outlet of the flow channel 42, when the clamping mechanism 3 clamps the end of the drill rod 5, the slurry inlet at the end of the drill rod 5 is in the sealing cavity 43, and a sealing ring can be arranged between the sealing cavity 43 and the top end of the drill rod 5 for sealing connection.

Further, in order to avoid position interference between the pulp conveying pipe required to be connected at the inlet of the flow passage 42 and the connecting arm 41, the inlet of the flow passage 42 is conveniently connected with an external pulp supply device, and the inlet of the flow passage 42 and the connecting arm 41 are arranged in a staggered manner in the circumferential direction of the vertical driving mechanism 2.

As shown in fig. 1, the vertical driving mechanism 2 of the present embodiment includes a cylinder 21, a cylinder body of the cylinder 21 is vertically installed at the bottom of the mounting plate 1, and the positioning block 4 is installed at a piston rod end of the cylinder 21; of course, the cylinder 21 is replaced by a hydraulic cylinder.

In the above structure, the piston rod of the cylinder 21 drives the positioning block 4 to move, so as to drive the connecting arm 41 arranged on the positioning block 4 to move, thereby realizing the clamping or releasing action of the clamping mechanism 3.

Further, the vertical driving mechanism 2 further includes four guide rods 22, and the guide rods 22 are circumferentially distributed around the cylinder 21 at intervals, preferably at equal intervals, although in the drill rod holder provided by the present invention, the vertical driving mechanism 2 includes more than two guide rods 22.

During the operation of the cylinder 21, the piston rod may incline due to uneven stress, so that more than two guide rods 22 are arranged in the circumferential direction of the cylinder 21 to ensure that the piston rod can always stretch and contract in the vertical direction during the stretching and contracting process.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is defined by the appended claims, and several modifications and amendments made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as the scope of the present invention.