CN209838340U - Drilling rod grabbing device - Google Patents

Abstract

The utility model provides a drill rod gripping device, which comprises a clamping mechanism, a first driving mechanism for driving the clamping mechanism to reciprocate vertically and a mounting plate for mounting the first driving mechanism; wherein, fixture includes: the positioning seat which is arranged at the movable end of the first driving mechanism and can be used for positioning the drill rod, more than two groups of clamping jaws which are circumferentially arranged around the positioning seat at intervals and second driving mechanisms which are connected with the clamping jaws in a one-to-one correspondence manner. The utility model discloses a first actuating mechanism changes fixture position in vertical side to the not unidimensional drilling rod of centre gripping, the commonality is high and can drive the drilling rod and move in vertical side.

Description

Drilling rod grabbing device

Technical Field

The utility model relates to an engineering machine tool equipment field, concretely relates to drilling rod grabbing device.

Background

At present, most existing pile machines are not provided with a drill rod storage system capable of achieving automatic storage and taking of drill rods, and the storage and taking of the drill rods depend on manpower to a large extent, so that the labor intensity is high, and time and labor are wasted. Particularly, in some special working environments, the pile machine further needs a system capable of achieving automatic storage and taking of the drill rods.

The prior art discloses an automatic drill rod storing and taking system which comprises a drill rod warehouse, a grabbing mechanism and a driving mechanism. The two drill rod storehouses are mainly used for storing various drill rods, and each drill rod storehouse can store 60 drill rods; the driving mechanism is mainly used for driving the drill rod in the drill rod warehouse to intermittently rotate, so that the drill rod in the drill rod warehouse can accurately rotate by a certain angle each time; the grabbing mechanism is used for storing and taking the drilling rod and realizing the connection and disconnection of the drilling rod, and the drilling tool moves among the left drilling rod library, the right drilling rod library and the power head. According to the technical scheme, the drill rod storage, taking out, clamping, connecting and disassembling and other actions of the drill rod are completed through the cooperation among the drill rod storage, the grabbing mechanism and the driving mechanism.

However, in the technical scheme, the grabbing mechanism is complex in structure, the drill rod can be clamped only after the drill rod needs to be rotated by a moving angle, when the drill rod is stored or clamped, the drill rod warehouse also needs to be rotated by a certain angle, the time consumption of the process is long, the grabbing and clamping position is located in the middle of the drill rod, the drill rod is prone to being inclined, and the drill rod cannot be controlled to ascend and descend.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art not enough, provide a can guarantee that the drilling rod snatchs stable, the drilling rod grabbing device that steerable drilling rod goes up and down.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a drill rod grabbing device comprises a clamping mechanism, a first driving mechanism and a mounting plate, wherein the first driving mechanism drives the clamping mechanism to reciprocate in the vertical direction;

wherein, fixture includes: the positioning seat which is arranged at the movable end of the first driving mechanism and can be used for positioning the drill rod, more than two groups of clamping jaws which are circumferentially arranged around the positioning seat at intervals and second driving mechanisms which are connected with the clamping jaws in a one-to-one correspondence manner.

Preferably, the positioning seat extends out of more than two connecting arms along different radial directions away from the first driving mechanism, and each connecting arm corresponds to one clamping jaw respectively.

Preferably, the positioning seat extends out of more than two hinged supports along different radial directions, and each hinged support corresponds to a second driving mechanism respectively;

the hinged support is positioned above the connecting arm, and the second driving mechanism is connected with the hinged support.

Preferably, the movable end of the second driving mechanism is hinged to one end of the clamping jaw, the suspension end of the connecting arm is hinged to the middle of the clamping jaw, and when the second driving mechanism works, the clamping jaw deflects up and down around the hinged position of the clamping jaw and the connecting arm.

Preferably, the end part of the clamping jaw, which is hinged with the second driving mechanism, is provided with a groove with two through sides, the movable end of the second driving mechanism is positioned in the groove and is hinged through a pivot, the clamping jaw deviates from the positioning seat from the hinged part of the connecting arm to be bent to form a clamping part, and the suspension end of the clamping part is provided with a clamping groove for clamping a drill rod.

Preferably, the distance from a hinge point P1 of the second driving mechanism to a hinge seat to a hinge point P2 of the clamping jaw and the second driving mechanism is L1, the distance from a hinge point P2 of the clamping jaw and the second driving mechanism to a hinge point P3 of the clamping jaw and the connecting arm is L2, and the distance from a hinge point P1 of the second driving mechanism and the hinge seat to a hinge point P3 of the clamping jaw and the connecting arm 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 seat is formed with a containing cavity matched with the end part of the drill rod.

Preferably, the positioning seat is further formed with a conical guide cavity, and the conical guide cavity is communicated with the accommodating cavity.

Preferably, the first driving mechanism comprises a cylinder, the positioning seat is mounted at the end of a piston rod of the cylinder, and a cylinder body of the cylinder is vertically mounted on the mounting plate;

alternatively, the cylinder is replaced by a hydraulic cylinder;

and/or the second driving mechanism comprises an air cylinder, the cylinder body of the air cylinder is vertically arranged on the hinged support, and the piston rod of the air cylinder is hinged with the clamping jaw;

alternatively, the cylinder is replaced by a hydraulic cylinder.

Preferably, the first driving mechanism further comprises more than two guide rods, the guide rods penetrate through the mounting plate and are distributed at intervals around the cylinder in the circumferential direction, and the guide rods are connected with the mounting plate in a sliding mode;

the mounting plate is detachably mounted on a drill rod storage rack of an external pile driver.

The utility model has the advantages that:

(1) under the condition that the height difference exists between the clamping mechanism and the drill rod in the vertical direction, the first driving mechanism drives the clamping mechanism to move in the vertical direction, and then the position of the clamping mechanism in the vertical direction is adjusted, so that the clamping mechanism can grab the drill rod, and the drill rod can be driven to move in the vertical direction.

(2) The positioning seat can ensure that the position of the clamping mechanism and the drill rod is automatically adjusted under the condition of misalignment, so that the manual adjustment time is saved.

(3) The clamping jaws which are circumferentially arranged around the positioning seat at intervals in more than two groups can guarantee that the drill rod can be evenly stressed when the drill rod is grabbed.

Drawings

Fig. 1 is a schematic structural view of a preferred drill rod gripping device according to an embodiment of the present invention;

fig. 2 is a front view of a preferred drill rod gripping device in an embodiment of the present invention;

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

FIG. 4 is a sectional view taken along line B-B of FIG. 3;

FIG. 5 is a diagram showing the state of the gripping mechanism of the present invention;

fig. 6 is a schematic structural view of the clamping jaw 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 2, the drill rod gripping device provided in this embodiment is disposed on the top of a drill rod storage rack, which is not shown in the drawings, and includes a gripping mechanism 1, a first driving mechanism 2 for driving the gripping mechanism 1 to reciprocate in the vertical direction, and a mounting plate 6 for mounting the first driving mechanism 2; wherein, fixture 1 includes: the positioning seat 3 which is arranged at the movable end of the first driving mechanism 2 and can be used for positioning the drill rod, more than two groups of clamping jaws 4 which are circumferentially arranged around the positioning seat 3 at intervals and second driving mechanisms 5 which are connected with the clamping jaws 4 in a one-to-one correspondence manner.

In the structure, under the condition that the height difference exists between the clamping mechanism 1 and the drill rod in the vertical direction, the first driving mechanism 2 drives the clamping mechanism 1 to move in the vertical direction, so that the position of the clamping mechanism 1 in the vertical direction is adjusted, the clamping mechanism 1 can be guaranteed to grab the drill rod, and the drill rod can be driven to move in the vertical direction after the clamping mechanism 1 clamps the drill rod. In this embodiment, preferably, two sets of clamping jaws are symmetrically disposed on two sides of the positioning seat 3, and the second driving mechanism 5 drives the corresponding clamping jaw 4 to grab a drill rod (not shown in the figure), and meanwhile, the positioning seat 3 is disposed to ensure that when the clamping mechanism 1 and the drill rod are not aligned, and when the clamping mechanism 1 clamps the drill rod, the positioning seat 3 can automatically perform position adjustment in any radial direction of the drill rod under the action of interaction force, so as to save manual adjustment time.

In the embodiment, since the clamping mechanism 1 clamps the end of the drill rod, the drill rod cannot be stabilized after the drill rod is clamped, and therefore, the clamping jaws 4 and the second driving mechanism 5 (not shown in the figure) are arranged at the bottom and the middle part of the drill rod storage rack, so that the stable storage of the drill rod is ensured.

Meanwhile, a slide rail is arranged at the top of the drill rod storage rack which is not shown in the figure, and the mounting plate 6 can be arranged on the slide rail, so that the drill rod grabbing device can move in the horizontal direction to grab the drill rods at different positions in the horizontal direction.

Specifically, the positioning seat 3 extends out of the first driving mechanism 2 along different radial directions and obliquely downward to form more than two connecting arms 31, and the farther away from the first driving mechanism 2, the larger the distance between the connecting arms 31 is. And each connecting arm 31 corresponds to a respective clamping jaw 4.

The positioning seat 3 extends out of more than two hinged seats 32 along different radial directions, and each hinged seat 32 corresponds to a second driving mechanism 5 respectively; the hinge base 32 is located above the link arm 31, and the second drive mechanism 5 is connected to the hinge base 32. Preferably, the hinge base 32 may be formed by two hinge plates symmetrically disposed on two sides of the second driving mechanism 5, so as to prevent the second driving mechanism 5 from being stressed on one side and increase the bearing force of the second driving mechanism 5.

In the above mechanism, the connecting arm 31 is used for supporting the clamping jaw 4, the hinge base 32 is used for supporting the second driving mechanism 5, the connecting arm 31 and the hinge base 32 both extend outwards from the positioning base 3 along different radial directions, so as to ensure that the clamping jaw 4 and the second driving mechanism 5 have enough space to move, and the clamping jaw 4, the second driving mechanism 5 and the positioning base 3 form an integrated structure, so that the first driving mechanism 2 can drive the whole clamping mechanism 1 to move. In order to avoid collision between the movable end of the second driving mechanism 5 and the connecting arm 31 when extending out, the distance between the connecting arm 31 and the positioning seat 3 in the horizontal direction is smaller than the distance between the second driving mechanism 5 and the positioning seat 3 in the horizontal direction.

As shown in fig. 2 and 5, further, the movable end of the second driving mechanism 5 is hinged to one end of the clamping jaw 4 through a pivot, the overhanging end (i.e. the end away from the positioning seat 3) of the connecting arm 31 is hinged to the middle part of the clamping jaw 4 through the pivot, and when the second driving mechanism 5 works, the clamping jaw 4 deflects up and down around the hinged position of the connecting arm 31.

In the above structure, because one end of clamping jaw 4 is articulated with the movable end of second actuating mechanism 5, and the middle part of clamping jaw 4 is articulated with the overhang end of linking arm 31, linking arm 31 is fixed on positioning seat 3, so when the expansion end of second actuating mechanism 5 stretches out, the tip atress of clamping jaw 4, make clamping jaw 4 upwards deflect around its articulated department with linking arm 31, after the expansion end of second actuating mechanism 5 stretches out and reaches certain stroke, when the distance between the clamping jaw 4 of mutual symmetry is less than the size of drilling rod tip, another tip and the mutual butt of drilling rod of clamping jaw 4, owing to encircle to set up more than two sets of clamping jaws 4 in positioning seat 3 circumference simultaneously, so clamping jaw 4 radially grabs and presss from both sides the drilling rod tip.

Similarly, when the movable end of the second driving mechanism 5 retracts, the clamping jaws 4 deflect downwards around the hinged positions of the clamping jaws and the connecting arm 31, and when the movable end of the second driving mechanism 5 retracts to reach a certain stroke and the distance between the clamping jaws 4 which are symmetrical to each other is larger than the end of the drill rod, each clamping jaw 4 is separated from the drill rod, and the clamping jaws 4 can release the drill rod. (the direction that the clamping surface of the clamping jaw 4 is close to the positioning seat 3 is upward, and the direction that the clamping surface of the clamping jaw 4 is far away from the positioning seat 3 is downward.)

As shown in fig. 6, the holding jaw 4 is further provided with a groove 412 with two sides passing through at the end part hinged to the second driving mechanism 5, and the movable end of the second driving mechanism 5 is positioned in the groove 412 and hinged through a pivot.

In the structure, the end part of the clamping jaw 4 is provided with the groove 412 with two through sides, so that when the clamping jaw 4 is hinged with the movable end of the second driving mechanism 5, the clamping jaw 4 is prevented from being stressed on one side, the movable end of the clamping jaw 4 or the second driving mechanism 5 is prevented from receiving torque force, the fatigue damage of the movable end of the clamping jaw 4 or the second driving mechanism 5 is reduced, and in addition, when the pivot shaft is connected, the pivot shaft has two supporting points, so that the pivot shaft can bear larger load.

Meanwhile, when the movable end of the second driving mechanism 5 moves downwards, the clamping jaw 4 deflects upwards around the boundary of the clamping jaw and the connecting arm 31, so as to avoid the situation that the clamping jaw 4 cannot deflect upwards continuously to cause part damage, the depth of the groove 412 of the clamping jaw 4 needs to meet the following condition: when the movable end of the second driving mechanism 5 reaches the minimum stroke or the maximum stroke, neither the movable end of the second driving mechanism 5 nor the suspended end of the connecting arm 31 abuts against the holding jaw 4.

Furthermore, the clamping jaw 4 is bent away from the positioning seat 3 from the hinged position of the clamping jaw and the connecting arm 31 to form a clamping portion 41, and a clamping groove 411 for clamping the drill rod is arranged at the suspended end of the clamping portion 41.

In the structure, the clamping jaw 4 forms the clamping part 41 in the vertical direction, so that the interference between the clamping jaw 4 and the drill rod can be avoided, and the clamping jaw 4 is prevented from colliding with the drill rod. If the jaws 4 are not provided with the gripping portions 41 (i.e. the jaws 4 are straight plates), the distance between the jaws 4 may still be smaller than the diameter of the drill rod when the movable end of the second driving mechanism 5 is retracted to the minimum stroke, so that the jaws 4 cannot grip the drill rod, and the jaws 4 collide with the drill rod, and in order to avoid the above problem, the distance between the jaws 4 must be increased, so that the size of the positioning socket 3 must be increased, or the length of the connecting arm 31 and the hinge socket 32 must be increased, but the cost is increased to some extent. The holding jaw 4 forms the holding portion 41 in the vertical direction, not only the above-described problem can be avoided, but also the cost does not need to be increased. The clamping groove 411 is used for clamping a drill rod, and the shape of the clamping groove 411 is matched with that of the drill rod.

Furthermore, the distance from a hinge point P1 of the second driving mechanism 5 and the hinge base 32 to a hinge point P2 of the clamping jaw 4 and the second driving mechanism 5 is L1, the distance from a hinge point P2 of the clamping jaw 4 and the second driving mechanism 5 to a hinge point P3 of the clamping jaw 4 and the connecting arm 31 is L2, and the distance from a hinge point P1 of the second driving mechanism 5 and the hinge base 32 to a hinge point P3 of the clamping jaw 4 and the connecting arm 31 is L3;

when the gripping device 1 is effectively gripping the end of the drill rod, L2+ L3> L1 and L1-L2< L3;

when the gripping device 1 is disengaged from the end of the drill rod, L1+ L2> L3 and L3-L2< L1. Since the clamping jaw 4 needs to clamp the drill rod, the clamping jaw 4 must rotate around the hinge point P3 between the clamping jaw and the connecting arm 41, so as to ensure that the P1, the P2 and the P3 are not blocked because of being in a straight line to cause a dead point position, and a triangle is needed to ensure that the clamping jaw 4 must be driven to deflect around the hinge point P3 between the clamping jaw and the connecting arm 41 when the movable end of the second driving mechanism 5 moves.

In the embodiment, in order to ensure a stable and reliable drilling rod clamping effect, the P2 is located right below the P1, the P3 is located obliquely below the P2, and the P3 is closer to the central axis of the positioning seat 3 relative to the P2. Of course, in the drill rod gripping device provided by the present invention, P2 may also be obliquely below P1, and P2 is closer to the central axis of the positioning socket 3 than P1. Of course, the particular positional settings relating to P1, P2, P3 may be adjusted according to the particular clamping effect required for the drill rod, but it should be noted that when the clamping jaw 4 is effectively clamping a drill rod, it is preferred that the clamping portion 41 of the clamping jaw 4 is in reliable surface contact, or at least line contact, with the end peripheral surface or flange of the drill rod.

As shown in fig. 3, the end of the drill rod has a radially enlarged enlargement, and the bottom of the positioning seat 3 is formed with a receiving cavity 33 matching the drill rod enlargement. When the clamping mechanism 1 clamps the drill bit, the accommodating cavity 33 can wrap the enlarged part of the drill rod, so that the enlarged part of the drill rod is prevented from being damaged due to impact in the process of grabbing the drill rod.

Preferably, the enlarged part of the drill rod has an axially convex conical end surface, the positioning seat 3 is further formed with a conical guide cavity 34, the aperture of the conical guide cavity 34 is gradually increased from top to bottom, and the conical guide cavity 34 is communicated with the accommodating cavity 33.

In the structure, the toper direction chamber 34 of positioning seat 3 not only can be when fixture 1 effectively grabs the clamp drilling rod tip, the tip of drilling rod can be wrapped up, play the effect of protection drilling rod tip, and when fixture 1 centre gripping drilling rod, when fixing a position under the inaccurate condition between drilling rod and positioning seat 3, the upper end of drilling rod and the contact of the toper face in toper direction chamber 34, can produce the interact power between toper face and the drilling rod, thereby make the tip of drilling rod can be along with the accurate cunning in toper direction chamber 34 of toper face, ensure that the drilling rod can be by clamping jaw 4 to the accurate centre gripping of positioning seat 3 direction.

Furthermore, since the drill rod is preferably a slurry pipe with a slurry pipeline in the embodiment, a sealing cavity 35 is further provided on the positioning seat 3 above the conical guide cavity 34 and communicated with the conical guide cavity 34.

As shown in fig. 2, the first driving mechanism 2 includes a cylinder 21, the positioning seat 3 is mounted at a piston rod end of the cylinder 21, and a cylinder body of the cylinder 21 is vertically mounted on the mounting plate 6; of course, said cylinder 21 is replaced by a hydraulic cylinder;

and/or the second driving mechanism 5 comprises a cylinder 51, the cylinder body of the cylinder 51 is vertically arranged on the hinged support 32, and the piston rod of the cylinder 51 is hinged with the clamping jaw 4; of course, the air cylinder 51 is replaced by a hydraulic cylinder.

In the structure, the piston rod of the cylinder 21 drives the positioning seat 3 to move in the vertical direction, so as to drive the clamping jaw 4 and the second driving mechanism 5 which are arranged on the positioning seat 3 to move synchronously, thereby realizing the change of the position of the clamping mechanism 1 in the vertical direction and clamping the drill rods with different height sizes.

In this embodiment, since each clamping jaw 4 is driven by the second driving mechanism 5, in order to prevent the drill rod from toppling over when part of the clamping jaw 4 moves first and part of the clamping jaw 4 does not move during the clamping process, the second driving mechanism 5 preferably adopts a synchronous hydraulic cylinder or a synchronous air cylinder.

Further, the first driving mechanism 2 further includes two guide rods 22, the guide rods 22 penetrate through the mounting plate 6 and are circumferentially distributed around the cylinder 21 at intervals, and the guide rods 22 are slidably connected with the mounting plate 6; the mounting plate 6 is detachably mounted on a drill rod storage rack of an external pile driver. Preferably, the guide bars are equally spaced.

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 move in the vertical direction during the expansion and contraction process.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and decorations made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. The drill rod gripping device is characterized by comprising a clamping mechanism (1), a first driving mechanism (2) for driving the clamping mechanism (1) to reciprocate vertically and a mounting plate (6) for mounting the first driving mechanism (2);

wherein the clamping mechanism (1) comprises: the positioning seat (3) which can be used for positioning the drill rod is arranged at the movable end of the first driving mechanism (2), more than two groups of clamping jaws (4) are circumferentially arranged around the positioning seat (3) at intervals, and the second driving mechanisms (5) are correspondingly connected with the clamping jaws (4) one by one.

2. The drill rod gripping device according to claim 1, wherein the positioning socket (3) extends in different radial directions away from the first drive means (2) to more than two connecting arms (31), and each connecting arm (31) corresponds to a respective clamping jaw (4).

3. The drill rod gripping device according to claim 2, wherein the positioning base (3) extends out of more than two hinged bases (32) along different radial directions, and each hinged base (32) corresponds to a second driving mechanism (5);

the hinged support (32) is positioned above the connecting arm (31), and the second driving mechanism (5) is connected with the hinged support (32).

4. A rod gripping device according to claim 3, wherein the movable end of the second actuating mechanism (5) is hinged to one end of the jaw (4), the overhanging end of the link arm (31) is hinged to the middle of the jaw (4), and when the second actuating mechanism (5) is operated, the jaw (4) deflects up and down around its hinge with the link arm (31).

5. The drill rod gripping device as claimed in claim 4, wherein the clamping jaw (4) is provided with a groove (412) with two through sides at the end part hinged with the second driving mechanism (5), the movable end of the second driving mechanism (5) is arranged in the groove (412) and hinged through a pivot, the clamping jaw (4) is bent away from the positioning seat (3) from the hinged part of the clamping jaw and the connecting arm (31) to form a clamping part (41), and the suspension end of the clamping part (41) is provided with a clamping groove (411) for clamping a drill rod.

6. The drill rod gripping device as recited in claim 5, wherein the distance from the hinge point P1 of the second driving mechanism (5) and the hinge base (32) to the hinge point P2 of the clamping jaw (4) and the second driving mechanism (5) is L1, the distance from the hinge point P2 of the clamping jaw (4) and the second driving mechanism (5) to the hinge point P3 of the clamping jaw (4) and the connecting arm (31) is L2, and the distance from the hinge point P1 of the second driving mechanism (5) and the hinge base (32) to the hinge point P3 of the clamping jaw (4) and the connecting arm (31) is L3;

when the clamping mechanism (1) is effectively gripping the end of the drill rod, L2+ L3> L1 and L1-L2< L3;

when the clamping mechanism (1) is disengaged from the end of the drill rod, L1+ L2> L3 and L3-L2< L1.

7. The rod grabber as recited in claim 1, characterized in that the bottom of the positioning socket (3) is formed with a receiving cavity (33) matching the end of the rod.

8. The drill rod gripping device according to claim 7, wherein the positioning socket (3) is further formed with a tapered guide cavity (34), and the tapered guide cavity (34) is communicated with the accommodating cavity (33).

9. The drill rod gripping device as claimed in claim 1, wherein the first driving mechanism (2) comprises a cylinder (21), the positioning seat (3) is mounted at the piston rod end of the cylinder (21), and the cylinder body of the cylinder (21) is vertically mounted on the mounting plate (6);

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

and/or the second driving mechanism (5) comprises a cylinder (51), the cylinder body of the cylinder (51) is vertically arranged on the hinged support (32), and the piston rod of the cylinder (51) is hinged with the clamping jaw (4);

alternatively, the cylinder (51) is replaced by a hydraulic cylinder.

10. The drill rod gripping device according to claim 9, wherein the first driving mechanism (2) further comprises more than two guide rods (22), the guide rods (22) are distributed at intervals around the cylinder (21) in the circumferential direction of the mounting plate (6), and the guide rods (22) are connected with the mounting plate (6) in a sliding manner;

the mounting plate (6) is detachably mounted on a drill rod storage rack of an external pile machine.