CN213360050U - Small-caliber drill rod clamp holder - Google Patents

Abstract

A small-caliber drill rod holder. Because of the not enough and complicated operation of area of contact in the clamping process, lead to small-bore drilling rod clamping process in the potential safety hazard great, lack the clamping structure who matches the small-bore drilling rod, when the small-bore drilling tool suddenly moved down and moved, lacked effective emergent remedial measure. In the utility model, two cylindrical shells are coaxially arranged from top to bottom in sequence, the two cylindrical shells are in sliding fit, each cylindrical shell is provided with a first-level inlet port matched with a drill rod along the height direction, and a clamping body is fixedly arranged in each cylindrical shell; the clamping face of arc holding piece sets up towards the one-level inlet port, is formed with the second grade inlet port between two centre gripping roll bodys, encloses between arc holding piece and two supporting shoes and closes the chamber that holds that forms the cooperation drilling rod, and two arc elastic filler strips level respectively set up the upper end and the lower extreme at two centre gripping roll bodys. The utility model is used for small-bore drilling tool.

Description

Small-caliber drill rod clamp holder

The technical field is as follows:

the utility model relates to a small-bore drilling rod holder belongs to geological drilling technical field.

Background art:

small bore drilling refers to a drilling method that uses a drill bit with a diameter of less than 76 mm, and is also commonly referred to as diamond small bore drilling. The small-caliber drill rod used in the method is a small steel pipe with threads at the tail part and is used for connecting the surface equipment of a drilling machine and the drilling and grinding equipment or the bottom hole device positioned at the bottom end of a drilling well. The small-caliber drill rod is commonly used in the drilling work of the shallow surface layer due to the characteristics of light weight and convenient operation. The small-caliber drilling is mainly realized by a diamond bit or a hard alloy bit. When the small-caliber drill is drilled, the clearance between the drilling tool and the hole wall is small, and the drilling tool is not easy to bend, so that the drilling flexibility, the drilling tool abrasion, the power consumption and the like are small. Because the small-caliber drill bit breaks less rock in the hole, the used drilling tool and equipment are lighter. However, in the use, the light advantage of small-bore drilling rod also brings adverse effect, the outstanding performance is that complex anchor clamps do not correspond with small-bore drilling rod, current complex general type anchor clamps mostly contact well with the heavy-calibre drilling tool, because the self weight of small-bore drilling tool is little, the external diameter is little, area of contact is limited when making anchor clamps centre gripping small-bore drilling tool, the centre gripping mode is single, be difficult to stably and durably with small-bore drilling tool phase-match, there is the potential safety hazard, current anchor clamps self structure is complicated simultaneously, the centre gripping operation degree of difficulty is big and loaded down with trivial details, also consume operating personnel's operating energy. Once the small-caliber drilling tool is temporarily suddenly displaced downwards, emergency remedial measures are lacked.

The invention content is as follows:

in order to solve the problems mentioned in the background art, the present invention provides a small-bore drill rod holder.

A small-caliber drill rod holder comprises two cylindrical shells, wherein the two cylindrical shells are coaxially arranged in sequence from top to bottom, the two cylindrical shells are in sliding fit, a first-stage inlet matched with a drill rod is processed in each cylindrical shell along the height direction of the cylindrical shell, and a clamping body is fixedly arranged in each cylindrical shell;

the clamping body comprises an arc-shaped clamping piece, two arc-shaped elastic cushion strips, two clamping roller bodies, two supporting blocks and two rotating shafts, the arc-shaped clamping piece is arranged on the inner wall of the cylindrical shell, the clamping surface of the arc-shaped clamping piece is arranged towards the primary inlet, the two supporting blocks are respectively vertically arranged on two sides of the arc-shaped clamping piece, each supporting block is hinged with the cylindrical shell through the rotating shafts, a clamping roller body is arranged on each supporting block, a secondary inlet is formed between the two clamping roller bodies, a containing cavity matched with a drill rod is formed by enclosing the arc-shaped clamping piece and the two supporting blocks, the two arc-shaped elastic cushion strips are respectively and horizontally arranged at the upper end and the lower end of the two clamping roller bodies, one end of each arc-shaped elastic cushion strip is tightly attached to the outer wall of one clamping, the other end of the arc-shaped elastic filler strip is tightly attached to the outer wall of the other clamping roller body through the other supporting block of the two supporting blocks.

As a preferable scheme: the arc clamping piece that is in the cylindrical shell in top in two cylindrical shells is last arc clamping piece, goes up the arc clamping piece and has arranged the first circular arch of several towards one-level inlet port side, and the first circular bellied external diameter of several equals.

As a preferable scheme: arc holding piece that is in below cylindrical shell in two cylindrical shells is arc holding piece down, and arc holding piece has arranged the circular arch of several second towards having arranged on the one-level inlet port side down, and the circular bellied external diameter of several second is supreme descending in proper order down, and the circular bellied minimum external diameter of second is the same with the circular bellied external diameter of first.

As a preferable scheme: the clamping roller body comprises a single roller body and a supporting sheet, the single roller body is fixedly connected with the supporting sheet into a whole, an installation opening matched with the single roller body is machined in the end portion of the supporting sheet, the single roller body is arranged in the installation opening, the supporting sheet is tightly attached to the side face of the supporting sheet, and the two supporting sheets of the two clamping roller bodies are arranged oppositely.

As a preferable scheme: two arc elastic pad strip replacements are an arc elastic gasket in every holding body, paste after one of two supporting shoes to tightly set up on the outer wall of a centre gripping roll body one end of arc elastic gasket, paste after another supporting shoe in two supporting shoes to tightly set up on the outer wall of another centre gripping roll body the other end of arc elastic gasket, arc elastic gasket has the opening along its thickness direction processing, the arc holding piece passes the opening and sets up on the inner wall of cylindrical shell.

As a preferable scheme: one in two cylindrical shell the bottom processing of cylindrical shell has the slider, another in two cylindrical shell the top processing of cylindrical shell has the arc slide, and the slider setting is in the arc slide and two sliding fit.

As a preferable scheme: the central angle corresponding to the arc-shaped slide way is less than or equal to 180 degrees.

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

one, the utility model discloses a rational in infrastructure, convenient operation is provided with the cramping body in two cylindrical shells through upper and lower sliding fit separately, realizes the centre gripping effect when to the longer body of rod in the drilling rod, and then realizes having enough area of contact's clamping process. The utility model discloses be applicable to the drilling rod of small bore specially, the centre gripping is stable, can realize multiple centre gripping mode, and the emergence probability of reducing the pole accident falls when handling proruption drilling rod and can meet an urgent need and remedy when moving down, ensures the lasting stable security in the clamping process.

The appearance of two, cylindrical shell is simple and effective, is favorable to grabbing on safe operation's basis, and every cylindrical shell fit in is provided with a holding body, and the outer wall of cylindrical shell is favorable to the staff directly to grip the operation, can also cooperate other instrument pipe clamp formula instruments to realize indirect control. The cylindrical shell is internally matched with the clamping body, and the elastic clamping body can correspondingly clamp small-caliber drill rods with different outer diameters.

Multiple clamping modes can be realized by the two cylindrical shells and the two clamping bodies, the center lines of the two one-level inlet openings are located on the same vertical line, and the two one-level inlet openings are in an initial clamping state communicated from top to bottom, so that the rapid clamping and rapid disassembly of the small-caliber drill rod are facilitated. Another kind of centre gripping mode is for cooperating through slider and slide and realizing the crisscross clamping state after two cylindrical shells twist, and the central line of two one-level inlet ports is in different vertical lines this moment, goes up the arc supporting piece and cooperatees the multidirectional centre gripping of realizing one section body of rod of small-bore drilling rod rather than two centre gripping roll bodys that correspond, and lower arc supporting piece cooperatees the multidirectional centre gripping of realizing another section body of rod of small-bore drilling rod rather than two centre gripping roll bodys that correspond and realizes the dislocation cooperation, and multiple clamping part cooperatees in order to realize safe and stable's clamping state.

Four, the utility model discloses simple structure not only can realize quick installation and dismantlement process, can also realize quick secondary and press from both sides tight operation, can deal with and handle the body of rod of interim proruption and move down the problem, and the flexible operation is changeable.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of a first three-dimensional structure of the present invention, in which the present invention is in an initial clamping state, and the clamping body includes two arc-shaped elastic pad strips;

fig. 3 is a schematic view of a third three-dimensional structure of the present invention, in which the present invention is in a clamping state after screwing, and the clamping body includes an arc-shaped elastic gasket;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 6 is a schematic perspective view of the upper arc-shaped holding piece;

FIG. 7 is a schematic perspective view of a lower arc-shaped holding piece;

FIG. 8 is a view showing a usage state of the present invention;

fig. 9 is a schematic top view of the connection between the slider and the arc-shaped slide way.

In the figure, 1-cylindrical housing; 1-1-upper cover; 1-2-cylinder body; 1-3-lower cover; 2-a primary access port; 3-a clamping body; 3-1-arc clamping piece; 3-2-arc elastic cushion strip; 3-3-clamping the roller body; 3-3-1-single roller body; 3-3-2-support sheet; 3-4-a holding cavity; 3-5-support block; 3-6-rotation axis; 4-a secondary access port; 5-a first circular protrusion; 6-a second circular protrusion; 7-arc elastic gasket; 8-a slide block; 9-arc slideway; 10-drill rod.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the solution according to the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.

The first embodiment is as follows: as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, the present embodiment adopts the following technical solutions, and includes two cylindrical shells 1, the two cylindrical shells 1 are coaxially arranged from top to bottom, the bottom of one cylindrical shell 1 in the two cylindrical shells 1 is slidably fitted with the top of the other cylindrical shell 1 in the two cylindrical shells 1, a primary inlet 2 for fitting a drill rod 10 is processed in each cylindrical shell 1 along the height direction of the cylindrical shell 1, and a clamping body 3 is fixedly installed in each cylindrical shell 1;

the clamping body 3 comprises an arc-shaped clamping sheet 3-1, two arc-shaped elastic cushion strips 3-2, two clamping roller bodies 3-3, two supporting blocks 3-5 and two rotating shafts 3-6, the arc-shaped clamping sheet 3-1 is arranged on the inner wall of the cylindrical shell 1, the clamping surface of the arc-shaped clamping sheet 3-1 is arranged towards the primary inlet 2, the two supporting blocks 3-5 are respectively and vertically arranged at two sides of the arc-shaped clamping sheet 3-1, each supporting block 3-5 is hinged with the cylindrical shell 1 through the rotating shaft 3-6, one clamping roller body 3-3 is arranged on each supporting block 3-5, a secondary inlet 4 is formed between the two clamping roller bodies 3-3, a containing cavity 3-4 matched with the drill rod 10 is formed by enclosing the arc-shaped clamping sheet 3-1 and the two supporting blocks 3-5, the two arc-shaped elastic cushion strips 3-2 are horizontally arranged at the upper end and the lower end of the two clamping roller bodies 3-3 respectively, one end of each arc-shaped elastic cushion strip 3-2 is tightly attached to the outer wall of one clamping roller body 3-3 through one supporting block 3-5 of the two supporting blocks 3-5, and the other end of each arc-shaped elastic cushion strip 3-2 is tightly attached to the outer wall of the other clamping roller body 3-3 through the other supporting block 3-5 of the two supporting blocks 3-5.

The drill rod 10 in this embodiment is an existing product, and is an existing small-caliber drill rod.

The transverse cross-sectional shape of the primary inlet port 2 in this embodiment is U-shaped.

In this embodiment, the cylindrical casing 1 is an integrated casing or a detachable casing. The integral type casing is favorable to reinforcing overall structure's resistance to compression and tensile strength, durable use. The detachable shell is convenient to detach, and maintenance and replacement of the loss part are facilitated.

Further, when the cylindrical shell 1 is a detachable shell, the cylindrical shell comprises an upper cover 1-1, a cylinder 1-2 and a lower cover 1-3, the upper cover 1-1 and the lower cover 1-3 are detachably connected to the upper end and the lower end of the cylinder 1-2 respectively, the upper cover 1-1 and the lower cover 1-3 are both circular, a first notch is machined in the edge of the upper cover 1-1 along the thickness direction of the upper cover, a second notch is machined in the edge of the lower cover 1-3 along the thickness direction of the lower cover, the first notch and the second notch are both U-shaped, a vertical notch is machined in the height direction of the outer wall of the cylinder 1-2, the vertical notch is a rectangular notch, and the first notch is communicated with the second notch through the rectangular notch to form a primary inlet 2 matched with the drill rod 10 to enter and exit. The shape and the disassembly structure of the cylindrical shell 1 are convenient for maintaining and replacing the arc-shaped clamping sheet 3-1 and the two arc-shaped elastic cushion strips 3-2 in the clamping body 3.

The shape of the cylindrical housing 1 in this embodiment is advantageous for clamping the drill rod 10, and rapid entry and exit of the drill rod 10 is achieved.

The cylindrical housing 1 in this embodiment also has a shape that provides a spatial location for the rotation of the two clamping roller bodies 3-3 of the clamping bodies 3 in a direction away from or towards each other.

In the embodiment, the arc-shaped elastic cushion strip 3-2 is a strip body made of hard rubber, elastic metal or other elastic materials, and plays a role in assisting the two clamping roller bodies 3-3 to make back movement or opposite movement due to the extrusion of the drill rod 10 so as to provide restoring force.

The second embodiment is as follows: the embodiment is further limited by the first specific embodiment, in the first specific embodiment, a clamping structure formed by mutually matching the arc-shaped clamping piece 3-1, the two arc-shaped elastic filler strips 3-2, the two clamping roller bodies 3-3, the two supporting blocks 3-5 and the two rotating shafts 3-6 can effectively clamp the small-caliber drill rods 10 with different outer diameters, and a clamping mode of matching the drill rods 10 to be elastically extruded into the accommodating cavities 3-4 is formed through a mode that the supporting blocks 3-5 and the rotating shafts 3-6 are hinged to each other and a rebound effect of the two arc-shaped elastic filler strips 3-2. The arc-shaped clamping piece 3-1 and the two supporting blocks 3-5 are enclosed to form an accommodating cavity 3-4 matched with the drill rod 10. The inner side surfaces of the arc-shaped clamping pieces 3-1 and the inner walls of the two supporting blocks 3-5 are clamping surfaces, and the rotating shaft 3-6 is a unidirectional rotating shaft body and can be realized by matching with a unidirectional bearing or other unidirectional non-return parts. So as to form the holding cavity 3-4 and hold the drill rod 10 at a constant holding position. Ensuring a stable and lasting clamping effect.

The third concrete implementation mode: the embodiment is further limited by the first or second embodiment, the arc-shaped clamping piece 3-1 in the upper cylindrical shell 1 in the two cylindrical shells 1 is an upper arc-shaped clamping piece, a plurality of first circular bulges 5 are arranged on the side surface of the upper arc-shaped clamping piece facing the first-stage inlet port 2, and the outer diameters of the plurality of first circular bulges 5 are equal.

In the embodiment, the upper arc-shaped clamping piece and the two supporting blocks 3-5 are mutually matched to form a clamping surface for the drill rod 10.

The plurality of first circular protrusions 5 in this embodiment are provided to increase a contact area with the drill rod 10 and increase a friction force.

In the embodiment, the upper arc-shaped clamping piece is a piece made of metal or other hard materials, and the thickness of the upper arc-shaped clamping piece is at least 1.5 cm.

Furthermore, the first circular bulges 5 are all bulges made of metal or other hard materials.

The fourth concrete implementation mode: this embodiment is the further restriction of embodiment one, two or three, and arc clamping piece 3-1 that is in below cylindrical shell 1 in two cylindrical shell 1 is arc clamping piece down, and arc clamping piece has arranged the circular arch 6 of several second towards one-level inlet port 2 side down, and the external diameter of the circular arch 6 of several second is decreased progressively from the bottom up in proper order, and the minimum external diameter of the circular arch 6 of second is the same with the external diameter of first circular arch 5.

The first circular arch 5 of several of middle and upper arc-shaped clamping piece cooperates the circular arch 6 of several of arc-shaped clamping piece down and forms from last to lower a plurality of external diameters in proper order the increase protruding point crowd, is favorable to forming the enhancement centre gripping effect to drilling rod 10.

Furthermore, the inner wall of each supporting block 3-5 is provided with auxiliary protrusions matched with a plurality of first circular protrusions 5 or a plurality of second circular protrusions 6. The auxiliary protrusion cooperating with the first circular protrusion 5 or the second circular protrusion 6 has the effect of increasing the contact surface for gripping the drill rod 10, thereby increasing the friction force, and thus ensuring a stable and durable gripping effect.

The fifth concrete implementation mode: the embodiment is further limited by the first, second, third or fourth embodiment, the clamping roller body 3-3 comprises a single roller body 3-3-1 and a supporting sheet 3-3-2, the single roller body 3-3-1 and the supporting sheet 3-3-2 are fixedly connected into a whole, an installation notch matched with the single roller body 3-3-1 is machined in the end portion of the supporting block 3-5, the single roller body 3-3-1 is arranged in the installation notch, the supporting sheet 3-3-2 is tightly attached to the side face of the supporting block 3-5, and the two supporting sheets 3-3-2 of the two clamping roller bodies 3-3 are arranged oppositely.

In the embodiment, the single roller body 3-3-1 is an axial roller body, and the support sheet 3-3-2 plays a role in conveniently disassembling the single roller body 3-3-1, provides a force application position for disassembly and can also provide an installation position for the arc elastic filler strip 3-2.

The sixth specific implementation mode: the embodiment is further limited by the first, second, third, fourth or fifth embodiment, in the embodiment, two arc-shaped elastic cushion strips 3-2 in each clamping body 3 are replaced by one arc-shaped elastic gasket 7, one end of each arc-shaped elastic gasket 7 is closely attached to the outer wall of one clamping roller body 3-3 through one supporting block 3-5 of the two supporting blocks 3-5, the other end of each arc-shaped elastic gasket 7 is closely attached to the outer wall of the other clamping roller body 3-3 through the other supporting block 3-5 of the two supporting blocks 3-5, an opening is processed in the thickness direction of each arc-shaped elastic gasket 7, and each arc-shaped clamping piece 3-1 penetrates through the opening to be arranged on the inner wall of the cylindrical shell 1.

In the embodiment, the using area of the arc-shaped elastic gasket 7 is larger than the using areas of the two arc-shaped elastic pad strips 3-2, the setting position is more reasonable, the clamping flexibility of the two clamping roller bodies 3-3 is improved, the recovery effect is better, and the arc-shaped elastic gasket 7 and one side of the clamping roller body 3-3 are connected with the clamping roller body 3-3 in a bonding mode. The arc-shaped elastic gasket 7 surrounds the two clamping roller bodies 3-3 in a wrapping mode, so that the use performance of elastic adjustment between the two clamping roller bodies 3-3 is enhanced.

The seventh embodiment: the embodiment is further limited to the first, second, third, fourth, fifth or sixth embodiment, and the installation process of the two arc-shaped elastic cushion strips 3-2 is as follows:

arc grooves are respectively processed on the top surface and the lower surface of each supporting block 3-5 and used for providing mounting positions for placing the arc elastic cushion strips 3-2, the arc elastic cushion strips 3-2 are pressed into the corresponding grooves in an extrusion mode, and the arc elastic cushion strips 3-2 and one section of strip body matched with the inner wall of the cylindrical shell 1 are connected with the inner wall of the cylindrical shell 1 in a detachable connection mode, so that the disassembly and the replacement are convenient.

The installation process of the arc elastic filler strip 3-2 at the upper ends of the two clamping roller bodies 3-3 is as follows:

after one side of the arc-shaped elastic backing strip 3-2 is bonded with one single roller body 3-3-1, the arc-shaped elastic backing strip 3-2 bypasses the clamping roller body 3-3 and then is extruded into one arc-shaped groove, passes through one supporting sheet 3-3-2 to be detachably connected with the inner wall of the cylindrical shell 1, passes through the other supporting sheet 3-3-2, passes through the other arc-shaped groove, and is surrounded and bonded on the other single roller body 3-3-1.

The process is similar to the installation process of the arc-shaped elastic filler strip 3-2 at the lower end of the two clamping roller bodies 3-3.

The specific implementation mode is eight: the embodiment is further limited by the first, second, third, fourth, fifth, sixth or seventh embodiment, a sliding block 8 is processed at the bottom of one cylindrical shell 1 in the two cylindrical shells 1, an arc-shaped slideway 9 is processed at the top of the other cylindrical shell 1 in the two cylindrical shells 1, and the sliding block 8 is arranged in the arc-shaped slideway 9 and is in sliding fit with the arc-shaped slideway 9.

In this embodiment, when the cylindrical housing 1 is a detachable housing, the lower cover 1-3 of the cylindrical housing 1 above is provided with the slider 8, the inner side surface and the outer side surface of the slider 8 are arc-shaped, the upper cover 1-1 of the cylindrical housing 1 below is provided with the arc-shaped slide 9, the slider 8 and the arc-shaped slide 9 are matched to realize the twisting effect of the two cylindrical housings 1, so that a staggered clamping mode is realized, and an emergency treatment process under the condition that the drill rod 10 falls or other emergency situations is dealt with, specifically, the rotating positions of the two arc-shaped clamping pieces 3-1 and the four supporting blocks 3-5 are used to realize the multi-directional and multi-position locking effect in a further clamping state.

In the embodiment, the first circular bulges 5 and the second circular bulges 6 with different outer diameters on the two arc-shaped clamping pieces 3-1 are matched to further compress the clamping effect in the twisting process of the two cylindrical shells 1, so that the drill rod 10 is prevented from further falling off, and the safety operability is enhanced.

Further, the length of the arc-shaped slide 9 determines the rotation angle of the cylindrical housing 1.

The specific implementation method nine: in the present embodiment, as shown in fig. 9, on the top surface of the lower cylindrical housing 1, the central angle of the arc-shaped slide 9 is less than or equal to 180 degrees.

The curved direction of the arc-shaped chute 9 in this embodiment is the same as the circumferential direction of the top surface or the bottom surface of the cylindrical housing 1.

The limiting can ensure that the rotating posture between the two cylindrical shells 1 is not too large easily, and the process of matching the two clamping bodies 3 between the two cylindrical shells 1 to realize staggered clamping can be realized.

The working process is as follows:

the drill rod 10 is pushed into the two cylindrical shells 1 simultaneously, namely the drill rod 10 enters from the two first-stage inlet ports 2 simultaneously and enters into the accommodating cavity 3-4 through the second-stage inlet port 4 simultaneously, when the drill rod 10 passes through the second-stage inlet port 4, each clamping roller body 3-3 horizontally rotates outwards under the action of the supporting block 3-5 and the rotating shaft 3-6 due to the extrusion of the drill rod 10, after the drill rod 10 enters, the two clamping roller bodies 3-3 recover under the resilience of the arc-shaped elastic cushion strip 3-2, the accommodating cavity 3-4 formed by the arc-shaped clamping pieces 3-1 and the two supporting blocks 3-5 in an enclosing mode clamps the drill rod 10, and the arc-shaped elastic cushion strip 3-2 plays a role of blocking the drill rod 10 towards the side portion of the drill rod 10.

When need further strengthen the clamping strength of drilling rod 10 or meet emergency fast operation the utility model discloses in order to realize strengthening the clamping strength, twist reverse a cylindrical shell 1 of the top in two cylindrical shells 1, remove the rotation action that realizes last cylindrical shell 1 in arc slide 9 through slider 8, thereby make its cylindrical shell 1 with the below take place the malposition operation under the coaxial state, drive the relative position of the first circular arch 5 of external diameter difference and the circular arch 6 of second in two cramping bodies 3 and change, thereby realize realizing clamping strength strengthening the processing process to drilling rod 10.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A small-bore drilling rod holder which characterized in that: the drilling rod clamping device comprises two cylindrical shells (1), wherein the two cylindrical shells (1) are coaxially arranged from top to bottom in sequence, the two cylindrical shells (1) are in sliding fit, a primary inlet (2) matched with a drilling rod (10) is processed in each cylindrical shell (1) along the height direction of the cylindrical shell, and a clamping body (3) is fixedly arranged in each cylindrical shell (1);

the clamping body (3) comprises an arc-shaped clamping piece (3-1), two arc-shaped elastic cushion strips (3-2), two clamping roller bodies (3-3), two supporting blocks (3-5) and two rotating shafts (3-6), the arc-shaped clamping piece (3-1) is arranged on the inner wall of the cylindrical shell (1), the clamping surface of the arc-shaped clamping piece (3-1) is arranged towards the primary inlet port (2), the two supporting blocks (3-5) are respectively and vertically arranged on two sides of the arc-shaped clamping piece (3-1), each supporting block (3-5) is hinged with the cylindrical shell (1) through the rotating shafts (3-6), one clamping roller body (3-3) is arranged on each supporting block (3-5), and a secondary inlet port (4) is formed between the two clamping roller bodies (3-3), an accommodating cavity (3-4) matched with the drill rod (10) is formed by enclosing the arc-shaped clamping piece (3-1) and the two supporting blocks (3-5), the two arc-shaped elastic filler strips (3-2) are respectively and horizontally arranged at the upper end and the lower end of the two clamping roller bodies (3-3), one end of each arc-shaped elastic filler strip (3-2) is tightly attached to the outer wall of one clamping roller body (3-3) through one supporting block (3-5) of the two supporting blocks (3-5), and the other end of each arc-shaped elastic filler strip (3-2) is tightly attached to the outer wall of the other clamping roller body (3-3) through the other supporting block (3-5) of the two supporting blocks (3-5).

2. The small-bore drill rod holder of claim 1, wherein: arc-shaped clamping pieces (3-1) in the upper cylindrical shell (1) in the two cylindrical shells (1) are upper arc-shaped clamping pieces, a plurality of first circular bulges (5) are arranged on the side surfaces of the upper arc-shaped clamping pieces facing the first-stage inlet opening (2), and the outer diameters of the plurality of first circular bulges (5) are equal.

3. The small-bore drill rod holder of claim 2, wherein: arc holding piece (3-1) that is in below cylindrical shell (1) in two cylindrical shell (1) is arc holding piece down, and arc holding piece has arranged the circular arch of several second (6) towards one-level inlet port (2) side down, and the external diameter of the circular arch of several second (6) is supreme descending in proper order down, and the minimum external diameter of the circular arch of second (6) is the same with the external diameter of first circular arch (5).

4. A small-bore drill rod holder as claimed in claim 1, 2 or 3, wherein: the clamping roller body (3-3) comprises a single roller body (3-3-1) and a supporting sheet (3-3-2), the single roller body (3-3-1) and the supporting sheet (3-3-2) are fixedly connected into a whole, an installation notch matched with the single roller body (3-3-1) is machined in the end portion of the supporting block (3-5), the single roller body (3-3-1) is arranged in the installation notch, the supporting sheet (3-3-2) is tightly attached to the side face of the supporting block (3-5), and the two supporting sheets (3-3-2) of the two clamping roller bodies (3-3) are arranged oppositely.

5. The small-bore drill rod holder of claim 1, wherein: two arc-shaped elastic cushion strips (3-2) in each clamping body (3) are replaced by an arc-shaped elastic gasket (7), one end of each arc-shaped elastic gasket (7) is tightly attached to the outer wall of one clamping roller body (3-3) through one supporting block (3-5) of the two supporting blocks (3-5), the other end of each arc-shaped elastic gasket (7) is tightly attached to the outer wall of the other clamping roller body (3-3) through the other supporting block (3-5) of the two supporting blocks (3-5), an opening is machined in the arc-shaped elastic gasket (7) in the thickness direction of the arc-shaped elastic gasket, and each arc-shaped clamping piece (3-1) penetrates through the opening to be arranged on the inner wall of the cylindrical shell (1).

6. The small-bore drill rod holder of claim 1, wherein: one in two cylindrical shell (1) the bottom processing of cylindrical shell (1) has slider (8), and another in two cylindrical shell (1) the top processing of cylindrical shell (1) has arc slide (9), and slider (8) set up in arc slide (9) and the two sliding fit.

7. The small-bore drill rod holder of claim 6, wherein: the central angle corresponding to the arc-shaped slide way (9) is less than or equal to 180 degrees.

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