CN220551082U - Screw thread pretightening force unscrewing rotary driving mechanism for combined drill rod - Google Patents

Abstract

The utility model discloses a screw thread pre-tightening loosening rotary driving mechanism for a combined drill rod, which comprises a lantern ring seat and a rotary clamp rotatably arranged in the lantern ring seat, wherein the rotary clamp is used for clamping the drill rod, a left connecting plate and a right connecting plate which horizontally extend outwards are symmetrically arranged at the lower part of the lantern ring seat, and a left hinging seat and a right hinging seat are respectively arranged on the left connecting plate and the right connecting plate; the rotary clamp is provided with a third end plate and a fourth end plate which are positioned at the two axial ends of the lantern ring seat; the left hinge lug is arranged at the position above the corresponding left hinge seat, the first hydraulic cylinder is connected between the left hinge lug and the left hinge seat, the right hinge lug is arranged at the position above the corresponding right hinge seat, and the second hydraulic cylinder is connected between the right hinge lug and the right hinge seat. The beneficial effects of the utility model are as follows: a small range of twisting movements can be performed to drive the clamp to achieve a small angle of rotation.

Description

Screw thread pretightening force unscrewing rotary driving mechanism for combined drill rod

Technical Field

The utility model relates to non-excavation construction equipment, in particular to a screw thread pre-tightening force unscrewing rotary driving mechanism for a combined drill rod.

Background

The non-excavation construction refers to that various rock-soil drilling equipment is utilized to directly replace or repair underground pipelines, so that traffic is not hindered, green lands and vegetation are not damaged. The technology has the advantages of small environmental impact, small occupied area, short construction period, small influence on traffic and the like, and is widely popularized and used at present.

The horizontal guide type top-pulling drilling equipment is one of common equipment for non-excavation construction, and the structure mainly comprises a drill rod and a drilling machine for driving the drill rod to move. The concrete construction process is as follows: after the drilling machine is lowered to the vertical repair well, the drilling machine drives the long drill rod to pre-drill a horizontal hole underground, the horizontal hole needs to extend into another adjacent repair well, then the other end (in the other repair well) of the long drill rod is connected with the reaming bit, and then the drilling machine drags the reaming bit back from the horizontal hole, so that the horizontal hole is enlarged to a required aperture, and then the non-excavation construction of the underground pipe network can be completed.

In the prior art, in order to facilitate the underground construction of a long drilling rod, the long drilling rod is designed into a multi-section combined structure, two adjacent sections of drilling rods are connected by adopting threads, and the driving of a drilling machine is used for realizing the screwing and the dismounting of threads. In the process of advancing the drill rod, the drill rod is increased section by section along with the increase of the drilling depth; and in the process of backing the drill rod, the drill rod is reduced section by section. Based on the long drilling rod of threaded connection's combination formula, there are many screw thread to twist and connect the position on the whole drilling rod, and when the rig reverse uninstallation one of them drilling rod section, any one drilling rod section all exists the possibility of being unscrewed, leads to unable corresponding drilling rod section of dismantling according to the established demand.

The applicant designs a screw thread pretightening force unloading device, and the concept is that two drill rod sections at a position to be disassembled are clamped simultaneously, one clamp is driven to rotate at a small angle, the screw thread pretightening force is released, the screw thread at the position is the position with the looest tightening force in a combined long drill rod, and finally the drilling machine reversely rotates to directionally disassemble the target screw rod section. In this development concept, there is no driving mechanism capable of achieving a small angle rotation of the jig.

Disclosure of Invention

In view of the above, the present utility model provides a screw pre-tightening unscrewing rotary driving mechanism for a modular drill rod, capable of performing a small range of screwing motions to drive a clamp to achieve a small angle rotation.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a screw thread pretightning force unscrewing rotary driving mechanism for combination formula drilling rod, its key lies in: the rotary clamp is used for clamping a drill rod, a left connecting plate and a right connecting plate which extend outwards horizontally are symmetrically arranged at the lower part of the collar seat, and a left hinging seat and a right hinging seat are respectively arranged on the left connecting plate and the right connecting plate; the rotary clamp is provided with a third end plate and a fourth end plate which are positioned at the two axial ends of the lantern ring seat;

the left hinge lug is arranged at the position above the corresponding left hinge seat, the first hydraulic cylinder is connected between the left hinge lug and the left hinge seat, the right hinge lug is arranged at the position above the corresponding right hinge seat, and the second hydraulic cylinder is connected between the right hinge lug and the right hinge seat.

Preferably, the collar seat has a mounting circular hole penetrating through the front and rear sides, the rotary clamp comprises a rotary seat body, the rotary seat body is composed of a second collar, and a third end plate and a fourth end plate fixed at two ends of the second collar, wherein the second collar is rotationally assembled in the mounting circular hole.

Preferably, the diameters of the third end plate and the fourth end plate are larger than the diameter of the second lantern ring, and the third end plate and the fourth end plate are respectively stopped at two ends of the lantern ring seat.

Preferably, through holes are formed in the middle of the third end plate and the middle of the fourth end plate.

Preferably, the upper part of the lantern ring seat is provided with an avoidance notch, and the top of the rotating seat body is exposed by the avoidance notch.

Preferably, the first hydraulic cylinder comprises a first cylinder seat and a first piston rod which is arranged in the first cylinder seat in a telescopic manner, the lower end of the first piston rod is hinged to the left hinged seat, first connecting columns which are outwards protruded are arranged on the two radial sides of the first cylinder seat, and the first connecting columns are rotatably assembled on the left hinged lugs.

Preferably, the second hydraulic cylinder comprises a second cylinder seat and a second piston rod which is arranged in the second cylinder seat in a telescopic manner, the lower end of the second piston rod is hinged to the right hinging seat, second connecting columns which are outwards protruded are arranged on the two radial sides of the second cylinder seat, and the second connecting columns are rotatably assembled on the right hinging lugs.

The beneficial effects of the utility model are as follows:

1. when two drill rod sections to be disassembled are clamped simultaneously, the first hydraulic cylinder and the second hydraulic cylinder act simultaneously in an alternating mode, and the rotary clamp can be driven to rotate at a small angle on the lantern ring seat, so that the corresponding drill rod sections are driven to twist and rotate, the thread pretightening force of the corresponding drill rod sections is released, and the purpose that the drill can directionally disassemble the target drill rod sections is further ensured.

2. The two groups of hydraulic oil are simultaneously and alternately telescopic to control the small-range screwing motion of the rotary clamp, so that the rotary clamp has the advantages of good controllability and sufficient driving force, and is extremely suitable for unloading the screw thread pretightening force.

Drawings

FIG. 1 is a schematic diagram of a screw thread pretension unscrewing rotary drive mechanism;

FIG. 2 is a schematic diagram of an exploded construction of a screw thread pretension unscrewing rotary drive mechanism;

FIG. 3 is an end view of a screw thread pre-tightening unscrewing rotary drive mechanism;

FIG. 4 is a reference diagram of the use state of the screw thread pre-tightening force unscrewing rotary driving mechanism in the non-excavation construction drilling machine A;

fig. 5 is a sectional view of the fixing jig 2;

fig. 6 is an exploded view of the fixing clip 2;

fig. 7 is a sectional view of the fixing base body 2a in the fixing jig 2.

Detailed Description

The utility model is further described below with reference to examples and figures.

As shown in fig. 1 and 2, a screw thread pre-tightening force unscrewing rotary driving mechanism structurally comprises a collar seat 1a and a rotary clamp 3 rotatably installed inside the collar seat 1a, wherein the rotary clamp 3 is used for clamping a drill rod, a left connecting plate 11 and a right connecting plate 12 which extend horizontally outwards are symmetrically arranged at the lower part of the collar seat 1a, and a left hinge seat 1b and a right hinge seat 1c are respectively arranged on the left connecting plate 11 and the right connecting plate 12. The rotary jig 3 has a third end plate 3a2 and a fourth end plate 3a3 at both axial ends of the collar base 1 a. The position of the third end plate 3a2 and the position of the fourth end plate 3a3 above the corresponding left hinging seat 1b are respectively provided with a left hinging lug g, a first hydraulic cylinder 4a is connected between the left hinging lug g and the left hinging seat 1b, the position of the third end plate 3a2 and the position of the fourth end plate 3a3 above the corresponding right hinging seat 1c are respectively provided with a right hinging lug h, and a second hydraulic cylinder 4b is connected between the right hinging lug h and the right hinging seat 1c.

The working principle of the screw thread pre-tightening force unscrewing rotation driving mechanism is described below in combination with the specific application of the drilling machine A and the combined drill rod 5, as follows:

referring to fig. 4, the drill a mainly relates to an output shaft 7a with a rotatable flat bracket and a motor 7 capable of driving the output shaft 7a to rotate. The combined drill rod 5 comprises a plurality of sections of drill rod 5b which are sequentially connected in a threaded manner, only two drill rod sections 5b are shown in fig. 4, wherein the leftmost drill rod section 5b is in power connection with an output shaft 7a, and based on the power connection, the motor 7 can drive the combined drill rod 5 to rotate. During underground construction, the drilling machine A is arranged on the flat support 8, the screw thread pre-tightening unscrewing rotary driving mechanism is assembled at the far end of the flat support 8, namely the collar seat 1a is fixed at the far end of the flat support 8, the far end of the flat support 8 is fixedly provided with a set of fixing clamps 2, and the fixing clamps 2 and the screw thread pre-tightening unscrewing rotary driving mechanism are coaxially arranged on the rotary clamps 3.

Based on the structure, the working process of the drilling machine A for disassembling one drill rod section 5b of the combined drill rod 5 is as follows:

in the initial state, the fixing clamp 2 and the rotating clamp 3 each clamp one drill pipe section 5b, then please refer to fig. 3, the first hydraulic cylinder 4a performs the extending movement, the second hydraulic cylinder 4b performs the contracting movement, so that the rotating clamp 3 can be driven to rotate forward, the drill pipe section 5b clamped by the rotating clamp 3 is driven to rotate for a certain angle, and the process can release the thread pretightening force between the two drill pipe sections 5b. At this time, for the whole combined drill rod 5, the thread at the position is looest, and then the drilling machine A drives the combined drill rod 5 to rotate again, so that the rest threads can be quickly withdrawn, and the purpose of loosening the designated drill rod section 5b is achieved. Meanwhile, in the actual construction process, the screw thread is completely detached by virtue of the drilling machine A, the screw thread pretightening force is possibly too large, the detachment fails, and the corresponding screw thread pretightening force is detached in advance by virtue of the first hydraulic cylinder 4a and the second hydraulic cylinder 4b, so that the problem can be effectively avoided.

As shown in fig. 1 and 2, the rotary fixture 3 is rotatably assembled in the collar seat 1a through the rotary seat body 3a, specifically: the collar seat 1a is provided with mounting round holes 1a1 penetrating through the front side and the rear side, the rotating seat body 3a is composed of a second collar 3a1, and a third end plate 3a2 and a fourth end plate 3a3 fixed at two ends of the second collar 3a1, wherein the second collar 3a1 is of a round structure, the second collar 3a1 is rotatably assembled in the collar seat 1a, the diameter of the third end plate 3a2 and the diameter of the fourth end plate 3a3 are larger than that of the second collar 3a1, after the assembly is completed, the third end plate 3a2 and the fourth end plate 3a3 are respectively stopped at two ends of the collar seat 1a, and the second collar 3a1 can be stably and rotatably kept in the collar seat 1 a. In order to ensure that the drill rod can penetrate into the rotary clamp 3, through holes are formed in the middle of the third end plate 3a2 and the middle of the fourth end plate 3a3.

As shown in fig. 2 and 3, the first hydraulic cylinder 4a includes a first cylinder seat 4a2 and a first piston rod 4a1 telescopically arranged in the first cylinder seat 4a2, the lower end of the first piston rod 4a1 is hinged on the left hinge seat 1b, two radial sides of the first cylinder seat 4a2 are provided with first connecting columns k protruding outwards, and the first connecting columns k are rotatably assembled on the left hinge lugs g. The second hydraulic cylinder 4b comprises a second cylinder seat 4b2 and a second piston rod 4b1 which is arranged in the second cylinder seat 4b2 in a telescopic mode, the lower end of the second piston rod 4b1 is hinged to the right hinging seat 1c, second connecting columns m which are outwards protruded are arranged on two radial sides of the second cylinder seat 4b2, and the second connecting columns m are rotatably assembled on the right hinging lugs h. Based on this, when the piston rod of the first hydraulic cylinder 4a is extended outward, the piston rod of the second hydraulic cylinder 4b is contracted inward, and the rotary jig 3 can be driven to rotate forward. On the contrary, when the piston rod of the second hydraulic cylinder 4b extends outwards, the piston rod of the first hydraulic cylinder 4a contracts inwards, and the rotary clamp 3 can be driven to rotate reversely. In other words, the first hydraulic cylinder 4a and the second hydraulic cylinder 4b are simultaneously and alternately operated, so that the rotary clamp 3 can be driven to rotate in the collar seat 1a at a small angle, and the screw pretightening force is unloaded.

In this embodiment, the specific structure of the fixing clamp 2 clamping the drill rod section 5b is as follows:

referring to fig. 5, the fixing clamp 2 includes a fixing seat body 2a fixedly assembled at the front end of the flat bracket 8, and as can be seen in fig. 7, a central through hole a is formed in the middle of the fixing seat body 2a, a mounting cavity b circumferentially encircling the central through hole a is further provided in the fixing seat body 2a, an assembly notch c circumferentially arrayed along the central through hole a is provided at one end of the central through hole a, a first clamping block 2b capable of sliding radially along the central through hole a is installed in the assembly notch c, and a first piston 2c capable of sliding axially along the central through hole a is installed in the mounting cavity b. As can be seen from fig. 6, the position of the first piston 2c close to the first clamping block 2b is provided with a sliding connection groove 2c1, the sliding connection groove 2c1 is obliquely arranged relative to the center line of the central through hole a, and the first clamping block 2b is provided with a sliding connection block 2b1 in sliding sleeve connection with the sliding connection groove 2c 1. As can be seen from fig. 5, the first piston 2c has an annular portion 2c2, and the space corresponding to the two sides of the annular portion 2c2 in the mounting chamber b is provided with a first oil hole d and a second oil hole e, respectively. After the drill rod section 5b penetrates the central through hole a, hydraulic oil is injected into the second oil hole e, so that the first piston 2c can be pushed to slide leftwards, and then the first clamping block 2b moves inwards along the radial direction of the central through hole a under the guiding action of the sliding connection groove 2c1 and the sliding connection block 2b1, so that the drill rod is clamped. Otherwise, hydraulic oil is injected into the first oil hole d, so that the first piston 2c can be pushed to slide rightwards, and then the first clamping block 2b moves outwards along the radial direction of the central through hole a under the guiding action of the sliding connection groove 2c1 and the sliding connection block 2b1, so that the clamping force on the drill rod is relieved.

In this embodiment, in order to provide a better clamping effect, the first clamping blocks 2b have four groups, the circumferential array is distributed in the circumference of the fixing base body 2a, and further, the inner sides of the first clamping blocks 2b are all provided with small protruding blocks 2b2 distributed in an array.

As shown in fig. 7, for facilitating the assembly of the fixture, the fixing base body 2a is of a combined structure, and is composed of a first collar 2a1, a first end plate 2a2 and a second end plate 2a3 fixed at two ends of the first collar 2a1, a first sleeve 2a4 extending into the first collar 2a1 is arranged in the middle of the first end plate 2a2, a central through hole a for penetrating a drill rod is surrounded by the inner space of the first sleeve 2a4, a rectangular base 2a11 is integrally formed at the lower part of the first collar 2a1, and the fixing fixture 2 is fixedly mounted at the front end of the flat bracket 8 through the rectangular base 2a 11.

Referring to fig. 4, in the present embodiment, the working principle of the rotary clamp 3 for clamping the drill rod is the same as that of the fixed clamp 2, and the description thereof will not be repeated here. In addition to this, the rotary clamp 3 may also be used to clamp the drill rod section 5b using other clamps known in the art.

Further, as shown in fig. 1, an avoidance gap 1a2 is provided at the upper portion of the collar seat 1a, and the avoidance gap 1a2 exposes the top of the rotating seat body 3a, so as to provide hydraulic oil required for clamping to the inside of the rotating clamp 3.

In the practical application process, when the drill rod section 5b of the combined drill rod 5 is disassembled, the axial displacement exists in the drill rod, the bottom of the lantern ring seat 1a can be arranged on the flat bracket 8 through a sliding rail component capable of moving at a small distance, and the purpose of the sliding rail component is to absorb the axial displacement of the transmission section 5a in a small range when the screw thread pretightening force is unloaded. Since this axial displacement is usually within 1mm, it can also be absorbed by self-deformation of the clamp.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (7)

1. A screw thread pretightning force unscrewing rotary driving mechanism for combination formula drilling rod, its characterized in that: the drilling rod clamping device comprises a lantern ring seat (1 a) and a rotating clamp (3) rotatably installed inside the lantern ring seat (1 a), wherein the rotating clamp (3) is used for clamping a drilling rod, a left connecting plate (11) and a right connecting plate (12) which extend outwards horizontally are symmetrically arranged at the lower part of the lantern ring seat (1 a), and a left hinging seat (1 b) and a right hinging seat (1 c) are respectively arranged on the left connecting plate (11) and the right connecting plate (12); the rotary clamp (3) is provided with a third end plate (3 a 2) and a fourth end plate (3 a 3) which are positioned at two axial ends of the collar seat (1 a);

the left hinge lug (g) is arranged at the position above the corresponding left hinge seat (1 b) of the third end plate (3 a 2) and the fourth end plate (3 a 3), the first hydraulic cylinder (4 a) is connected between the left hinge lug (g) and the left hinge seat (1 b), the right hinge lug (h) is arranged at the position above the corresponding right hinge seat (1 c) of the third end plate (3 a 2) and the fourth end plate (3 a 3), and the second hydraulic cylinder (4 b) is connected between the right hinge lug (h) and the right hinge seat (1 c).

2. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 1, wherein: the lantern ring seat (1 a) is provided with a mounting round hole (1 a 1) penetrating through the front side and the rear side, the rotary clamp (3) comprises a rotary seat body (3 a), the rotary seat body (3 a) is composed of a second lantern ring (3 a 1) and a third end plate (3 a 2) and a fourth end plate (3 a 3) which are fixed at two ends of the second lantern ring (3 a 1), and the second lantern ring (3 a 1) is rotatably assembled in the mounting round hole (1 a 1).

3. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 2, wherein: the diameters of the third end plate (3 a 2) and the fourth end plate (3 a 3) are larger than the diameter of the second lantern ring (3 a 1), and the third end plate (3 a 2) and the fourth end plate (3 a 3) are respectively stopped at two ends of the lantern ring seat (1 a).

4. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 1, wherein: and through holes are formed in the middle of the third end plate (3 a 2) and the middle of the fourth end plate (3 a 3).

5. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 2, wherein: the upper part of the lantern ring seat (1 a) is provided with an avoidance gap (1 a 2), and the avoidance gap (1 a 2) enables the top of the rotating seat body (3 a) to be exposed.

6. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 1, wherein: the first hydraulic cylinder (4 a) comprises a first cylinder seat (4 a 2) and a first piston rod (4 a 1) which is arranged in the first cylinder seat (4 a 2) in a telescopic mode, the lower end of the first piston rod (4 a 1) is hinged to the left hinging seat (1 b), first connecting columns (k) protruding outwards are arranged on the two radial sides of the first cylinder seat (4 a 2), and the first connecting columns (k) are rotatably assembled on the left hinging lugs (g).

7. The thread-pretension unscrewing rotary drive mechanism for a modular drill rod of claim 1, wherein: the second hydraulic cylinder (4 b) comprises a second cylinder seat (4 b 2) and a second piston rod (4 b 1) which is arranged in the second cylinder seat (4 b 2) in a telescopic mode, the lower end of the second piston rod (4 b 1) is hinged to the right hinging seat (1 c), second connecting columns (m) protruding outwards are arranged on the two radial sides of the second cylinder seat (4 b 2), and the second connecting columns (m) are rotatably assembled on the right hinging lugs (h).