CN220551081U - Drill rod clamping device for rotary cutting shield non-excavation equipment - Google Patents

Abstract

The utility model discloses a drill rod clamping device for rotary cutting shield non-excavation equipment, which comprises a bottom plate, wherein a clamping mechanism is arranged on the bottom plate, the clamping mechanism comprises a base body fixedly assembled on the bottom plate, the base body is provided with a central through hole and a mounting cavity circumferentially encircling the central through hole, the central through hole is used for penetrating and mounting a drill rod, one end of the central through hole is provided with assembly gaps distributed along the circumferential array of the central through hole, a clamping block capable of radially sliding along the central through hole is mounted in the assembly gaps, a piston capable of axially sliding along the central through hole is mounted in the mounting cavity, and the piston can force the clamping block to radially reciprocate along the central through hole by reciprocating sliding. The beneficial effects of the utility model are as follows: the drill rod can be clamped to assist the drilling machine in stably completing the splicing and screwing-out of the drill rod.

Description

Drill rod clamping device for rotary cutting shield non-excavation equipment

Technical Field

The utility model relates to the technical field of municipal pipeline trenchless construction, in particular to a drill rod clamping device for rotary cutting shield trenchless equipment.

Background

At present, the conventional construction technology of paving pipes and replacing pipes for excavating urban road surfaces is not used in main cities of all countries in the world, and the non-excavation technology is used instead. The non-excavation is a new construction technology for laying, replacing and repairing various underground pipelines under the condition of excavating an extremely small part of the earth surface by utilizing various rock-soil drilling equipment and technical means in a guiding, directional drilling and other modes, traffic is not hindered, greenbelts and vegetation are not damaged, the normal living and working order of shops, hospitals, schools and residents is not influenced, the interference of the traditional excavation construction on the living of residents is solved, and the damage and adverse effect on traffic, environment and surrounding building foundations are avoided.

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.

Because the underground space of the vertical overhaul well is limited, the long drill rod is adopted to construct underground, and the problem of difficult operation exists. Therefore, the applicant intends to design the long drill rod into a multi-section splicing structure, and the drill rod is increased section by section along with the increase of the drilling depth in the process of advancing the drill rod; and in the process of backing the drill rod, the drill rod is reduced section by section. In the development conception, each section of drill rod is to be connected by screw threads, and after one section of drill rod is clamped, the drilling machine drives the adjacent drill rod to rotate, so that the screw threads among the sections of drill rod can be spliced. Due to the complex downhole construction environment, a clamp device capable of clamping a drill rod downhole is not available at present.

Disclosure of Invention

In view of the above, the utility model provides a drill rod clamping device for rotary cutting shield non-excavation equipment, which can clamp a drill rod to assist a drilling machine to complete the splicing and screwing-out of the drill rod.

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

the drill rod clamping device for the rotary cutting shield trenchless equipment is characterized by comprising a bottom plate, wherein a clamping mechanism is arranged on the bottom plate and comprises a base fixedly assembled on the bottom plate, the base is provided with a central through hole and a mounting cavity circumferentially encircling the central through hole, the central through hole is used for penetrating through a drill rod to be mounted, one end of the central through hole is provided with mounting notches distributed along a circumferential array of the central through hole, clamping blocks capable of radially sliding along the central through hole are mounted in the mounting notches, a piston capable of axially sliding along the central through hole is mounted in the mounting cavity, and the reciprocating sliding of the piston can force the clamping blocks to radially reciprocate along the central through hole.

By adopting the structure, when clamping and fastening is performed on the drill rod in the central through hole, the piston slides leftwards, so that the clamping block can be forced to move inwards along the radial direction of the central through hole, and the inner side of the clamping block is in close contact with the surface of the drill rod, so that the drill rod is clamped and fixed, and the drill rod can be stably spliced and screwed down. On the contrary, the piston slides rightwards, and the clamping block moves outwards along the radial direction of the central through hole, so that the clamping force on the drill rod can be relieved.

As preferable: the piston is provided with a sliding connection groove at the position corresponding to the assembly notch, the sliding connection groove is obliquely arranged relative to the central line of the central through hole, and the clamping block is provided with a sliding connection block which is in sliding sleeve joint with the sliding connection groove; the piston is provided with an annular part, and a first oil hole and a second oil hole are respectively arranged in the space, corresponding to the two sides of the annular part, of the mounting cavity. By adopting the structure, hydraulic oil is injected into the second oil hole, the piston can be pushed to slide leftwards, and then the clamping block moves inwards along the radial direction of the central through hole under the guiding action of the sliding connection groove and the sliding connection block, so that the drill rod is clamped. Otherwise, hydraulic oil is injected into the oil hole, so that the piston can be pushed to slide rightwards, and then under the guiding action of the sliding connection groove and the sliding connection block, the clamping block moves outwards along the radial direction of the central through hole, so that the clamping force on the drill rod can be relieved.

As preferable: the inner side of the clamping block is provided with small bumps distributed in an array. By adopting the structure, the friction force between the inner side of the clamping block and the surface of the drill rod can be increased, so that the clamping mechanism can clamp the drill rod more stably, the drill rod is prevented from being deviated in the splicing process, and the use quality of the drill rod is ensured.

As preferable: the base comprises a lantern ring, a first end plate and a second end plate, wherein the first end plate and the second end plate are fixed at two ends of the lantern ring, a sleeve extending into the lantern ring is arranged in the middle of the end plate, the central through hole is surrounded by an inner space of the sleeve, a rectangular base is integrally formed at the lower part of the lantern ring, and the rectangular base is fixedly arranged on the bottom plate. The structure is adopted so as to be convenient for installation.

As preferable: the number of the clamping blocks is four. By adopting the structure, the clamping effect of the clamping mechanism is further improved.

Compared with the prior art, the utility model has the beneficial effects that:

1. when the drill rod clamping device for the rotary cutting shield non-excavation equipment is adopted, the piston slides leftwards when clamping and fastening the drill rod in the central through hole, so that the clamping block can be forced to move inwards along the radial direction of the central through hole, the inner side of the clamping block is tightly contacted with the surface of the drill rod, the drill rod is clamped and fixed, and the drill rod can be stably spliced and screwed and disassembled. On the contrary, the piston slides rightwards, and the clamping block moves outwards along the radial direction of the central through hole, so that the clamping force on the drill rod can be relieved.

2. The piston of the drill rod clamping device is driven by hydraulic oil, can provide sufficient clamping force, has the advantages of convenient clamping and release, and is particularly suitable for non-excavation sites.

Drawings

Fig. 1 is a schematic view of a trenchless apparatus comprising a drill a, a composite drill rod 5 and a rod clamp F;

FIG. 2 is a cross-sectional view of the trenchless apparatus of FIG. 1;

fig. 3 is a schematic view of the structure of the transmission section 5a in the composite drill rod 5;

fig. 4 is a schematic structural view of the hollow boss 6 d;

FIG. 5 is a schematic view of the construction of the pipe clamp F;

FIG. 6 is a cross-sectional view of the pipe clamp F;

FIG. 7 is an exploded view of the pipe clamp F;

fig. 8 is a cross-sectional view of the housing 2a in the rod clamp F.

Detailed Description

The embodiment will be described in detail with reference to a specific application of the drill rod clamping device F in rotary cutting shield trenchless equipment.

As shown in fig. 1, a trenchless apparatus is composed of a drill a, a composite drill rod 5 and a rod clamp F. Referring to fig. 2, the drilling machine a mainly includes a flat bracket 6a, a base 6b, a hydraulic cylinder 6c mounted on the base 6b, a hollow shaft sleeve 6d, and a driving device 7. The hollow shaft sleeve 6d is rotatably mounted inside the base body 6b, and the driving device 7 is used for driving the hollow shaft sleeve 6d to rotate. As can be seen from fig. 2, the modular drill rod 5 comprises a transmission section 5a and a number of splicing sections 5b, which are threaded in sequence. As can be seen from fig. 4, the inner hole wall of the hollow shaft sleeve 6d is provided with a strip-shaped raised strip 6d1 extending along the length direction, as can be seen from fig. 3, the outer surface of the transmission section 5a is provided with a strip-shaped groove 5a1 extending along the length direction, under the interaction of the strip-shaped groove 5a1 and the strip-shaped raised strip 6d1, the transmission section 5a is sleeved in the hollow shaft sleeve 6d in a sliding spline manner, based on the sliding spline, the driving device 7 drives the hollow shaft sleeve 6d to rotate, and the combined drill rod 5 can synchronously rotate along with the hollow shaft sleeve 6d, so that the rotary motion of drilling is realized.

Further, referring to fig. 1, a base 6b is slidably assembled on a flat bracket 6a, hydraulic cylinders 6c are symmetrically arranged on two sides of the base 6b, the hydraulic cylinders 6c include a cylinder body f fixed on the base 6b and a piston rod g with one end telescopically installed in the cylinder body f, a supporting disc 6a3 is arranged at the front part of the flat bracket 6a, and the outer ends of the piston rods g are fixedly supported on the supporting disc 6a 3. Limiting parts 5c are fixedly arranged at two ends of the transmission section 5a, and the limiting parts 5c are used for limiting the sliding range of the transmission section 5a in the hollow shaft sleeve 6 d. Based on the above, the piston rod g of the hydraulic cylinder 6c stretches and contracts, so that the base body 6b can be driven to slide back and forth relative to the flat bracket 6a, and in the process, when the base body 6b slides to be abutted with the limiting part 5c of the transmission section 5a, the combined drill rod 5 can slide synchronously along with the base body 6b, so that the axial feeding control of the drill rod is realized.

As shown in fig. 2, the transmission section 5a of the combined drill rod 5 is always located inside the hollow shaft sleeve 6d, and the total length of the drill rod is determined by the number of splicing sections 5b spliced at the front part of the transmission section 5 a. When the hydraulic cylinder 6c drives the transmission section 5a to feed forward to the limit position, the two splicing sections 5b are separated in a threaded manner, then the hydraulic cylinder 6c drives the drilling machine A to reset backward, and then one splicing section 5b is connected between the separated two splicing sections 5b again, so that the length expansion of the combined drill rod 5 can be realized. Conversely, the reverse operation can achieve a reduction in the spliced section 5b.

Referring to fig. 2 again, the drill rod clamping device F is installed at the front of the drilling machine a, and when the combined drill rod 5 increases or decreases the splicing section 5b, the drill rod clamping device F can clamp and fix the splicing section 5b to assist the drilling machine a to complete connection and disassembly of the splicing section 5b. The method comprises the following steps:

as shown in fig. 5 and 6, the drill rod clamping device F comprises a bottom plate 1, a clamping mechanism 2 is fixedly arranged on the bottom plate 1, the clamping mechanism 2 comprises a base body 2a fixedly assembled on the bottom plate 1, a central through hole a is formed in the middle of the base body 2a, a mounting cavity b circumferentially encircling the central through hole a is further formed in the base body 2a, an assembly notch c distributed along a circumferential array of the central through hole a is formed at one end of the central through hole a, a clamping block 2b capable of radially sliding along the central through hole a is mounted in the assembly notch c, a piston 2c capable of axially sliding along the central through hole a is mounted in the mounting cavity b, the piston 2c is driven to slide by hydraulic oil in the mounting cavity b, and the piston 2c can force the clamping block 2b to radially reciprocate along the central through hole a.

Based on the above structural design, when clamping the drill rod in the central through hole a, the piston 2c slides leftwards, so that the clamping block 2b can be forced to move inwards along the central through hole a in the radial direction, thereby clamping the drill rod. On the contrary, the piston 2c slides rightward, and the clamping block 2b moves radially outward along the central through hole a, so that the clamping force on the drill rod can be released.

Referring to fig. 7, a sliding groove 2c1 is provided at a position of the piston 2c near the clamping block 2b, the sliding groove 2c1 is inclined with respect to a center line of the center through hole a, and the clamping block 2b is provided with a sliding block 2b1 slidably sleeved with the sliding groove 2c 1. As can be seen from fig. 6, the piston 2c has an annular portion 2c2, and the space corresponding to 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. Based on this, the second oil hole e is filled with hydraulic oil, so that the piston 2c is pushed to slide leftward, and then the clamping block 2b moves radially inward along the center through hole a under the guiding action of the sliding groove 2c1 and the sliding block 2b1, thereby clamping the drill rod. Otherwise, hydraulic oil is injected into the oil hole d, so that the piston 2c can be pushed to slide rightwards, and then the 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 can be relieved.

Furthermore, be equipped with seal groove on the annular portion 2c2 outer disc, assembly sealing washer k in the seal groove, so design can guarantee the sealed effect of piston 2c in installation cavity b, ensures that hydraulic oil can promote piston 2c steadily and control the removal.

In the present embodiment, both ends of the sliding block 2b1 have the protruding portions n that can be fitted into both ends of the sliding groove 2c1, so that the sliding block 2b1 can stably slide in the sliding groove 2c 1.

Referring to fig. 7 again, in order to provide a better clamping effect, the number of the clamping blocks 2b is four, and the four groups of clamping blocks 2b are circumferentially distributed in the circumferential direction of the base 2a in an array. Further, small bumps 2b2 distributed in an array are arranged on the inner side of the clamping block 2 b. So design, when grip block 2b inboard and drilling rod butt, the frictional force on grip block 2b inboard and drilling rod surface can be increased to little lug 2b for fixture 2 can more stably grip the drilling rod, prevents that the drilling rod from taking place the off normal at the concatenation in-process, has guaranteed the quality of use of drilling rod.

As shown in fig. 7 and 8, for facilitating the assembly of the fixture, the base 2a is a combined structure, and is composed of a collar 2a1, and end plates 2a2 and second end plates 2a3 fixed at two ends of the collar 2a1, wherein a sleeve 2a4 extending into the collar 2a1 is arranged in the middle of the end plate 2a, a central through hole a for penetrating a drill rod is surrounded by the inner space of the sleeve 2a4, a rectangular base 2a11 is integrally formed at the lower part of the collar 2a1, and the clamping mechanism 2 is fixedly arranged on the bottom plate 1 through the rectangular base 2a 11.

Referring to fig. 2, in particular applications, the drill rod clamping device F is mounted on the front of the drill a via the base plate 1, i.e. the base plate 1 is secured to the front of the flat bracket 6 a. The combined drill rod 5 realizes the working principle of disassembling and installing the splicing section 5b that: after the two splicing sections 5b are preliminarily butted, the clamping mechanism 2 clamps and fixes the splicing section 5b at the right end, then the drilling machine A drives the transmission section 5a to rotate forward or reversely, and the splicing section 5b at the left end can be driven to rotate, so that the connection and the disassembly of threads between the two splicing sections 5b are realized.

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. The drill rod clamping device for the rotary cutting shield trenchless equipment is characterized by comprising a bottom plate (1), wherein a clamping mechanism (2) is arranged on the bottom plate (1), the clamping mechanism (2) comprises a base body (2 a) fixedly assembled on the bottom plate (1), the base body (2 a) is provided with a central through hole (a) and a mounting cavity (b) circumferentially encircling the central through hole (a), the central through hole (a) is used for penetrating and mounting a drill rod, one end of the central through hole (a) is provided with assembly notches (c) distributed along a circumferential array of the central through hole, clamping blocks (2 b) capable of radially sliding along the central through hole (a) are arranged in the assembly notches (c), a piston (2 c) capable of axially sliding along the central through hole (a) is assembled in the mounting cavity (b), and the piston (2 c) can force the clamping blocks (2 b) to radially reciprocate along the central through hole (a).

2. The drill rod clamping device for rotary cutting shield trenchless equipment of claim 1, wherein: the piston (2 c) is provided with a sliding connection groove (2 c 1) at a position corresponding to the assembly notch (c), the sliding connection groove (2 c 1) is obliquely arranged relative to the central line of the central through hole (a), and the clamping block (2 b) is provided with a sliding connection block (2 b 1) which is in sliding sleeve connection with the sliding connection groove (2 c 1).

3. The drill rod clamping device for rotary cutting shield trenchless equipment of claim 1, wherein: the piston (2 c) is provided with an annular part (2 c 2), and a first oil hole (d) and a second oil hole (e) are respectively arranged in the space of the installation cavity (b) corresponding to the two sides of the annular part (2 c 2).

4. The drill rod clamping device for rotary cutting shield trenchless equipment of claim 1, wherein: the inner side of the clamping block (2 b) is provided with small bumps (2 b 2) distributed in an array.

5. The drill rod clamping device for rotary cutting shield trenchless equipment of claim 1, wherein: the base body (2 a) comprises a lantern ring (2 a 1) and a first end plate (2 a 2) and a second end plate (2 a 3) which are fixed at two ends of the lantern ring (2 a 1), a sleeve (2 a 4) extending into the lantern ring (2 a 1) is arranged in the middle of the end plate (2 a 2), the central through hole (a) is formed by encircling an inner space of the sleeve (2 a 4), a rectangular base (2 a 11) is integrally formed at the lower part of the lantern ring (2 a 1), and the rectangular base (2 a 11) is fixedly arranged on the base plate (1).

6. The drill rod clamping device for rotary cutting shield trenchless equipment of claim 1, wherein: the number of the clamping blocks (2 b) is four.

7. A drill rod clamping apparatus for rotary cutting shield trenchless equipment as claimed in claim 3 wherein: a sealing groove is arranged on the outer circular surface of the annular part (2 c 2), and a sealing ring (k) is assembled in the sealing groove.