Drill rod installation clamp holder

Abstract

The utility model relates to the technical field of coal mine hydraulic drilling machines, and discloses a drill rod installation clamp holder which comprises a base, first through holes for a drill rod to penetrate through are formed in the two sides of the base, a swing body is arranged on the base, a clamping unit is installed on the swing body, and the drill rod installation clamp holder further comprises a guide assembly. An opening enabling the first through hole to be opened is formed in the side, away from the rack, of the first through hole, the width of the opening is larger than or equal to the diameter of the large drilling tool, an overturning part is arranged on the side face of the base, and the swing body can overturn around the overturning part and away from the opening. According to the technical scheme, the installation process of the large drilling tool can be simplified, manpower investment is reduced, construction time is shortened, construction efficiency is improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine hydraulic drilling machines, in particular to a drill rod installation clamp. Background Art

[0002] The clamp is a key component of the drilling rig. Its main function is to clamp the drill rod passing through the clamping hole to prevent the drill rod from slipping in the hole. At the same time, it can cooperate with the rotator to complete the connection and disassembly of two drill rods. With the development of drilling technology, the supporting clamps of the drilling rig are also gradually evolving to meet the needs of the drilling rig to clamp and load and unload drill rods. Among them, the drill rod loading and unloading technology of the directional drilling rig is particularly complex, which requires loading and unloading of both ordinary drill rods and large drilling tools such as bottom hole motors.

[0003] When the existing clamp is used in a directional drilling rig, the length or outer diameter of some large drill tools is much larger than that of ordinary drill rods, making it difficult to directly place the large drill tools in the clamp. For example, the bottom hole motor, the core drill tool for directional drilling, is much larger in length and outer diameter than ordinary drill rods. It is impossible to install or disassemble the bottom hole motor by the common method of loading and unloading drill rods from the rear end or middle of the frame. It can only be installed by inserting the clamp from the front end of the clamp, that is, the frame. However, the distance from the front end of the clamp to the hole wall is very limited, making it difficult to directly install the bottom hole motor into the clamp. There are generally two solutions at the current construction site: First, the bottom hole motor is tilted at a certain angle relative to the axis of the inner hole of the clamp (i.e., the drilling axis) and inserted into the clamp, but the scope of application of this method is very limited. When the distance between the clamp and the hole wall is small to a certain extent, the overly tilted bottom hole motor will not be able to align with the inner hole of the clamp. At this time, the frame needs to be tilted as a whole to change the up and down inclination angle of the frame, so that the inner hole of the clamp and the bottom hole motor have the same inclination angle. After installing the bottom hole motor into the clamp, adjust the up and down inclination angle of the frame again. Second, the clamp is dismantled as a whole, the bottom hole motor is installed and sent into the hole, and then the clamp is reinstalled to adapt to the installation of other drill rods. This method has a wide range of applications and can also be used when the distance between the clamp and the hole wall is small.

[0004] However, the first solution not only requires multiple adjustments to the up and down inclination of the inner hole axis of the clamp, but also requires the installation of a bottom hole motor in a narrow operating space, which undoubtedly consumes a lot of manpower and construction time. The second solution requires a lot of manpower and construction time for both disassembly and installation due to the large size, heavy weight and complex structure of the clamp. Both methods consume a lot of manpower and construction time, greatly affecting construction efficiency, and there are huge safety hazards. Utility Model Content

[0005] The utility model aims to provide a drill rod installation clamp to simplify the installation process of large-scale drilling tools, reduce manpower input, shorten construction time, improve construction efficiency, and reduce safety hazards.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a base, both sides of the base are provided with a No. 1 through hole for the drill rod to pass through, the base is provided with a swing body, the swing body is installed with a clamping unit, and also includes a guide assembly, the swing body is rotatably connected to the base through the guide assembly, the No. 1 through hole is provided with an opening that opens the No. 1 through hole away from the frame side, the opening width is greater than or equal to the diameter of the large drilling tool, the side of the base is provided with a flipping part, and the swinging body can flip around the flipping part and away from the opening.

[0007] The beneficial effects of this solution are as follows: the clamping unit has two working conditions: swinging condition: under normal construction conditions, sometimes the drill rod in the clamping unit and the drill rod in the power head need to rotate relative to each other at a small angle (such as pre-loosening the drill rod joint), but the power head rotates at a fast speed and it is difficult to control the rotation angle. Therefore, at this time, the swing body reciprocates with the No. 1 through hole as the rotation axis to complete the pre-loosening of the rotating rod; flipping condition: when large drilling tools need to be installed, since the length and outer diameter of large drilling tools are much larger than ordinary drill rods, it is impossible to use the drilling rig’s usual method of loading and unloading drill rods from the rear end or middle of the frame for installation or disassembly. The installation can only be done by inserting the clamp from the front end of the frame. However, the distance from the front end of the clamp to the hole wall is extremely limited, making it difficult to directly load the large drilling tools into the clamp. Due to the opening of the present technical solution, when installing a large drilling tool, the guide assembly can be removed, and the swing body can be turned around the flip part. According to the principle of lever, since the rotation fulcrum is moved to the flip part, the rotation amplitude of the rear end of the clamping unit is larger than that of the swinging condition, and the swing body can be turned clockwise beyond the center of the base, so that it is almost completely exposed from the base. At this time, a very spacious space is formed inside and on the top of the clamp, and the large drilling tool can be directly placed from top to bottom. The swing body can avoid the large drilling tool and will not interfere with the installation of the large drilling tool. The large drilling tool can be clamped with the help of other clamps. This process only requires the disassembly and assembly of a small number of small parts, which not only reduces the space requirement for the front end of the clamp for the installation of large drilling tools, but also saves a lot of time and manpower for the overall removal of the clamp, and ensures on-site safety. The present technical solution simplifies the installation process of large drilling tools, reduces manpower investment, shortens construction time, improves construction efficiency, and reduces safety hazards.

[0008] Since guide assemblies are provided on both sides of the swing body in the present technical solution, when the drill rod enters or exits through hole No. 1, the guide assembly can limit the radial position of the drill rod to prevent the drill rod from shifting in the radial direction, thereby ensuring that the drill rod is always within the range that can be clamped by the clamping unit, and at the same time protecting the clamping unit and the drilling rig power head from damage caused by excessive deviation of the drill rod.

[0009] Furthermore, a No. 1 driving member is hinged on the frame, and an output shaft of the No. 1 driving member is hinged on the bottom of the swing body below the flipping part.

[0010] The beneficial effect of this solution is that due to the setting of the No. 1 driving member, this technical solution can drive the swinging body to swing or flip.

[0011] Furthermore, the guide assembly includes a guide outer sleeve and a guide inner sleeve, the guide outer sleeve and the guide inner sleeve are detachably connected, the inner diameter of the guide outer sleeve matches the drill rod with a smaller outer diameter, and the inner diameter of the guide inner sleeve matches the drill rod with a larger outer diameter.

[0012] The beneficial effect of this solution is as follows: since the guide assembly of this technical solution is composed of a guide outer sleeve and a guide inner sleeve, and the inner diameter of the guide outer sleeve matches the drill rod with a small outer diameter, and the inner diameter of the guide inner sleeve matches the drill rod with a large outer diameter, therefore, when the guide inner sleeve and the guide outer sleeve are installed at the same time, it can be suitable for the drill rod with a small outer diameter, and when the guide outer sleeve is removed and only the guide inner sleeve is used, it is suitable for the drill rod with a large outer diameter.

[0013] This technical solution can save installation space and make the overall layout of the drilling rig more compact by integrating the guide component on the swing body.

[0014] This technical solution facilitates on-site accessory management and identification due to the obvious structural differences between the guide outer sleeve and the guide inner sleeve.

[0015] In this technical solution, since the guide outer sleeve and the guide inner sleeve can realize switching between two working conditions and are easy to disassemble, the cost of spare parts can be reduced.

[0016] Furthermore, the guide outer sleeve includes a No. 1 small diameter section and a No. 1 large diameter section connected in sequence, and the guide inner sleeve includes a No. 2 small diameter section and a No. 2 large diameter section connected in sequence, the outer diameter of the No. 1 small diameter section matches the inner diameter of the No. 2 small diameter section, and the outer diameter of the No. 1 large diameter section matches the inner diameter of the No. 2 large diameter section.

[0017] The beneficial effect of this solution is: since the outer diameter of the No. 1 small diameter segment matches the inner diameter of the No. 2 small diameter segment, and the outer diameter of the No. 1 large diameter segment matches the inner diameter of the No. 2 large diameter segment, the guide inner sleeve can limit the conductor outer sleeve in the axial direction to prevent the guide outer sleeve from moving in the horizontal direction.

[0018] Furthermore, the clamping unit includes two clamping parts, which are relatively arranged on both sides of the guide sleeve, and each clamping part includes a No. 2 driving member, which is installed at the end of the swing body. A cava assembly is installed on the output shaft of the No. 2 driving member, and the cava assembly is used to clamp the drill rod.

[0019] The beneficial effect of this solution is that due to the setting of the No. 2 driving member, this technical solution can drive the slip assembly to move to the side close to the drill pipe, thereby realizing the clamping drive of the slip assembly.

[0020] Furthermore, the cava assembly includes an inner cava and an outer cava. The outer cava is installed on the output shaft of the second drive component. The inner cava and the inner side of the outer cava are detachably connected. The inner diameter of the inner cava matches the drill rod with a smaller outer diameter, and the inner diameter of the outer cava matches the drill rod with a larger outer diameter.

[0021] The beneficial effects of this solution are as follows: in this technical solution, since the inner diameter of the inner cava matches the drill rod with a smaller outer diameter, and the inner diameter of the outer cava matches the drill rod with a larger outer diameter, the drill rod with a larger outer diameter can be switched by quickly disassembling and assembling the inner cava, thereby improving the application scope of the clamping unit, and is particularly suitable for situations where a directional drilling rig uses both ordinary drill rods and special drilling tools such as large drilling tools.

[0022] Furthermore, the inner side surfaces of the inner slip and the outer slip are provided with a plurality of protrusions.

[0023] The beneficial effect of this solution is that since the inner side surfaces of the inner slip and the outer slip are both provided with a plurality of protrusions, it is convenient to increase the friction coefficient of the inner side surfaces of the inner slip and the outer slip and reduce the probability of the drill rod slipping.

[0024] Furthermore, the cava assembly also includes fasteners, and the inner cava is fixedly connected with positioning bosses on both sides along its radial direction, and the outer cava is provided with accommodating grooves on both sides along its radial direction. The accommodating grooves correspond one-to-one to the positioning bosses, and the positioning bosses can be inserted into the accommodating grooves. The positioning bosses are connected to the outer cava by fasteners.

[0025] The beneficial effects of this solution are as follows: Due to the arrangement of the positioning boss and the receiving groove, this technical solution uses a larger plane to position the inner cava axially, and uses fasteners to achieve radial positioning of the inner cava. The plane bears the shear force for the fasteners, which greatly reduces the possibility of deformation of the fasteners under stress and improves the reliability of positioning. At the same time, since the inner cava is fixed to the inner side of the outer cava by fasteners, when replacing the inner cava, the output shaft of the second drive member shrinks to form an open space for disassembling and assembling the cava assembly. The cava assembly can be quickly replaced by simply removing the fasteners, which is convenient and quick to operate.

[0026] Furthermore, a reinforcing plate is detachably connected to the top of the base, and a limiting protrusion is fixedly connected to one side of the reinforcing plate close to the opening. The limiting protrusion can be inserted into the opening, and the bottom of the limiting protrusion is tangent to the cylinder where the No. 1 through hole is located.

[0027] The beneficial effect of this solution is that the design of the reinforcement plate not only ensures the overall strength of the clamp during normal construction, but also meets the space requirement of the clamp for installing large drilling tools.

[0028] Furthermore, the base is provided with a plurality of mounting holes for connecting with the frame.

[0029] The beneficial effect of this solution is that: due to the provision of the mounting holes, this technical solution facilitates fixing the base on the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of the drill rod installation clamp in Example 1 and Example 3 of the utility model;

[0031] Figure 2 It is a three-dimensional diagram of the base in Example 1 and Example 3 of the utility model;

[0032] Figure 3 It is a three-dimensional diagram of the swinging body in Example 1 of the utility model;

[0033] Figure 4 It is a front view of the drill rod mounting clamp in Embodiment 1, Embodiment 2 and Embodiment 3 of the present utility model;

[0034] Figure 5 For this utility model Figure 4 Sectional view at AA in the middle;

[0035] Figure 6 A three-dimensional diagram of the guide jacket in Example 1 of the utility model;

[0036] Figure 7 This is a schematic diagram of the structure of the guide inner sleeve in Example 1 of the utility model;

[0037] Figure 8 For this utility model Figure 7 Sectional view at the middle BB;

[0038] Fig. 9 It is a three-dimensional diagram of the inner slip in Example 2 of the utility model;

[0039] Fig.10 It is a three-dimensional diagram of the external slip in Example 2 of the utility model. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific implementation methods:

[0041] The figure marks in the drawings of the specification include: base 1, mounting base plate 2, front support plate 3, rear support plate 4, No. 1 through hole 5, flip plate 6, pin shaft 7, swing body 8, No. 1 driving member 9, No. 1 support plate 10, No. 2 support plate 11, front mounting plate 12, rear mounting plate 13, No. 2 through hole 14, swing ear seat 15, lining plate 16, flip shaft seat 17, guide assembly 18, guide outer sleeve 19, guide inner sleeve 20, No. 1 small diameter section 21, No. 1 large diameter section 22, No. 2 small diameter section 23, No. 2 large diameter section 24, No. 2 driving member 25, slip assembly 26, inner slip 27, outer slip 28, protrusion 29, positioning boss 30, countersunk through hole 31, accommodating groove 32, threaded hole 33, reinforcement plate 34, limiting protrusion 35.

[0042] Example 1

[0043] The drill pipe installation clamp is basically as follows Figure 1-10 shown.

[0044] like Figure 1 The drill rod mounting clamp shown includes a base 1, a swing unit, a guide assembly 18 and a clamping unit.

[0045] like Figure 2 As shown, the base 1 includes a mounting base plate 2, a front support plate 3 and a rear support plate 4. The upper side of the mounting base plate 2 is provided with a plurality of mounting holes for connecting with the frame. The front support plate 3 and the rear support plate 4 are symmetrically welded on the left and right sides of the upper side of the mounting base plate 2. The left sides of the front support plate 3 and the rear support plate 4 are provided with a coaxial No. 1 through hole 5. The No. 1 through hole 5 is used for the drill rod to pass through. The tops of the front support plate 3 and the rear support plate 4 are provided with openings, which are connected with the No. 1 through hole 5, and large drilling tools can pass through the openings. The front end of the base 1 is provided with a flip part. Specifically, the flip part includes two flip plates 6. The two flip plates 6 are respectively welded on the front ends of the front support plate 3 and the rear support plate 4, and each flip plate 6 is provided with a flip hole.

[0046] like Figure 1 and Figure 3As shown, the swing unit is arranged between the front support plate 3 and the rear support plate 4, and there is a gap between the bottom of the swing unit and the mounting base plate 2, so as to facilitate the swing or flipping of the swing unit. Specifically, the swing unit includes a swing body 8, a No. 1 driving member 9 and a pin shaft 7. The swing body 8 includes a No. 1 support plate 10, a No. 2 support plate 11, a front mounting plate 12 and a rear mounting plate 13. The No. 1 support plate 10 and the No. 2 support plate 11 are arranged in parallel, and the left sides of the No. 1 support plate 10 and the No. 2 support plate 11 are provided with a No. 2 through hole 14 for installing the guide assembly 18, and the No. 2 through hole 14 is connected with the No. 1 through hole 5. The front mounting plate 12 is welded to the front ends of the No. 1 support plate 10 and the No. 2 support plate 11. The bottom of the front mounting plate 12 is installed with a swing ear seat 15 by bolts. The output shaft of the No. 1 driving member 9 is hinged on the swing ear seat 15, and the cylinder body of the No. 1 driving member 9 is hinged on the frame. The rear mounting plate 13 is welded to the rear ends of the No. 1 support plate 10 and the No. 2 support plate 11, and two lining plates 16 are welded to the top and bottom of the swing body 8. The space formed between the lining plate 16 at the top of the swing body 8 and the lining plate 16 at the bottom of the swing body 8 provides a guide channel for the clamping unit. Flip shaft seats 17 are welded on the left and right sides of the front end of the swing body 8. The flip plate 6 and the flip shaft seat 17 are connected by a pin shaft 7, and the No. 1 driving member 9 can drive the swing body 8 to rotate around the flip shaft seat 17.

[0047] like Figure 1 As shown, there are two guide assemblies 18, and the two guide assemblies 18 are respectively arranged on the left and right sides of the base 1. Specifically, as shown in FIG. Figure 4-8 As shown, each guide assembly 18 includes a guide outer sleeve 19 and a guide inner sleeve 20, the guide outer sleeve 19 includes a No. 1 small diameter section 21 and a No. 1 large diameter section 22 connected in sequence, the No. 1 small diameter section 21 and the No. 1 large diameter section 22 are integrally formed, the guide inner sleeve 20 includes a No. 2 small diameter section 23 and a No. 2 large diameter section 24 connected in sequence, the No. 2 small diameter section 23 and the No. 2 large diameter section 24 are integrally formed, the outer diameter of the No. 1 small diameter section 21 matches the inner diameter of the No. 2 small diameter section 23, and the outer diameter of the No. 1 large diameter section 22 matches the inner diameter of the No. 2 large diameter section 24. 4, the inner diameter of the No. 2 large diameter section 24 is matched with the inner hole of the No. 2 small diameter section 23 to form a step shape, which can limit the axial position of the guide sleeve 19, the No. 1 large diameter section 22 and the No. 2 large diameter section 24 are installed on the swing body 8 by screws, and are rotatably set in the No. 1 through hole 5, the inner diameter of the guide sleeve 19 is matched with the drill rod with a small outer diameter, the inner diameter of the guide inner sleeve 20 is matched with the drill rod with a large outer diameter, the guide assembly 18 is rotatably set on the base 1, and the No. 1 driving member 9 can drive the swing body 8 to rotate around the center of the guide inner sleeve 20.

[0048] like Figure 1As shown, the clamping unit is installed on the swing body 8 and is used to clamp the drill rod. Specifically, the clamping unit includes two clamping parts, which are relatively arranged on the front and rear sides of the guide assembly 18, and the structures of the two clamping parts are the same. The clamping part on the front side of the guide assembly 18 is used as an example for explanation. The clamping part includes a No. 2 driving member 25, which is installed on the front mounting plate 12 by bolts. A slip assembly 26 is installed on the output shaft of the No. 2 driving member 25 by bolts. The output shaft of the No. 2 driving member 25 can drive the slip assembly 26 to extend toward the center of the No. 1 through hole 5. The slip assembly 26 is used to clamp the drill rod. In this embodiment, the No. 1 driving member 9 and the No. 2 driving member 25 are both hydraulic cylinders.

[0049] The specific implementation process is as follows:

[0050] Under normal construction conditions, the flip plate 6 and the flip shaft seat 17 are not connected by the pin shaft 7. The swing body 8 takes the guide inner sleeve 20 as the central axis and realizes reciprocating swing within a smaller angle range under the drive of the No. 1 driving member 9.

[0051] When it is necessary to turn the flip body out of the base 1 as a whole through the No. 1 driving member 9, the flip plate 6 and the flip shaft seat 17 are connected through the pin shaft 7, and the guide assembly 18 is removed, so that the swing body 8 rotates around the flip hole.

[0052] Working principle:

[0053] (1) Guiding effect on drill pipe

[0054] In the present technical solution, since guide assemblies 18 are provided on both sides of the swing body 8, when the drill rod enters or exits the No. 1 through hole 5, the guide assembly 18 can limit the radial direction of the drill rod to prevent the drill rod from deviating in the radial direction, thereby ensuring that the drill rod is always within the range that can be clamped by the clamping unit, and at the same time protecting the clamping unit and the drilling rig power head from damage caused by excessive deviation of the drill rod.

[0055] (2) Suitable for drill rods with different outer diameters

[0056] Since the guide assembly 18 of the present technical solution is composed of a guide outer sleeve 19 and a guide inner sleeve 20, and the inner diameter of the guide outer sleeve 19 matches the drill rod with a small outer diameter, and the inner diameter of the guide inner sleeve 20 matches the drill rod with a large outer diameter, therefore, when the guide inner sleeve 20 and the guide outer sleeve 19 are installed at the same time and cooperated with the inner cava 27, it can be suitable for drill rods with small outer diameters; when the guide outer sleeve 19 and the inner cava 27 are removed and only the guide inner sleeve 20 and the outer cava 28 are used, it is suitable for drill rods with large outer diameters.

[0057] (3) Swinging of the swinging body

[0058] Under normal construction conditions, it is sometimes necessary to rotate the drill rod in the clamping unit and the drill rod in the power head at a small angle (for example, to pre-loosen the drill rod joint), but the power head rotates at a fast speed and it is difficult to control the rotation angle. Therefore, at this time, the flip plate 6 and the flip shaft seat 17 are not connected by the pin 7, and the swing body 8 takes the guide inner sleeve 20 as the central axis, and the swing body 8 is driven by the first driving member 9 to realize the reciprocating swing of the swing body 8.

[0059] (4) Swinging body flips

[0060] When it is necessary to install a large drilling tool, since the length and outer diameter of the large drilling tool are much larger than those of an ordinary drill rod, it is impossible to use the method of loading and unloading the drill rod from the rear end or the middle of the frame, which is usually used by the drilling rig, to install and disassemble it. The clamp can only be inserted from the front end of the frame to install it. However, the distance from the front end of the clamp to the hole wall is extremely limited, and it is difficult to directly load the large drilling tool into the clamp. Due to the setting of the opening, the guide assembly 18 can be removed when installing the large drilling tool, and the swing body 8 is driven by the No. 1 driving member 9 to flip around the flip part. According to the principle of the lever, since the rotation fulcrum moves to the flip part, when the output shaft of the No. 1 driving member 9 shrinks, the amplitude of the rotation of the rear end of the clamping unit is larger than that of the swinging condition, and the swing body 8 can be flipped clockwise to exceed the center of the base 1, so that it is almost completely exposed from the base 1. At this time, a very spacious space is formed inside and on the top of the clamp, and the large drilling tool can be directly placed from top to bottom. The swing body 8 can avoid the large drilling tool and does not interfere with the installation of the large drilling tool. The large drilling tool is clamped by other clamps. This process only requires the disassembly and assembly of a small number of small parts, which not only reduces the space requirement for the front end of the clamp for the installation of large drilling tools, but also saves a lot of time and manpower for the overall dismantling of the clamp, and ensures on-site safety.

[0061] When it is necessary to replace the cava assembly 26 or internal parts, the swing body 8 needs to be flipped out of the base 1 as a whole for operation. At this time, the guide assembly 18 is removed, and the swing body 8 is flipped around the flipping part. According to the principle of lever, since the rotation fulcrum moves to the flipping part, the rear end of the swing body 8 has a larger rotation amplitude than the swinging condition. Under the driving action of the No. 1 driving member 9, the swing body 8 can be flipped clockwise beyond the center of the base 1, so that it is almost completely exposed from the base 1, which is convenient for replacing internal parts.

[0062] Example 2

[0063] On the basis of Example 1, Figure 5 and Figure 9-10As shown, the slip assembly 26 includes an inner slip 27, an outer slip 28 and a fastener. The inner side surfaces of the inner slip 27 and the outer slip 28 are provided with a plurality of protrusions 29, which are block-shaped or finely pointed. Due to the arrangement of the protrusions 29, the friction coefficient of the inner side surfaces of the inner slip 27 and the outer slip 28 is increased, and the probability of the drill rod slipping is reduced. The front projection of the inner slip 27 is a "cross" shape, and the main body of the middle section cross section of the inner slip 27 is an arc shape. The upper and lower sides of the inner slip 27 are integrally formed with positioning bosses 30, and the positioning bosses 30 are provided with countersunk through holes 31. The upper and lower sides of the inner surface of the outer slip 28 are provided with a receiving groove 32, and the bottom of the receiving groove 32 is provided with a threaded hole 33. The positioning boss 30 corresponds to the receiving groove 32 one by one. The fastener passes through the countersunk through hole 31 to fix the positioning boss 30 on the outer slip 28. This positioning method makes good use of the advantages of high tensile strength of the threaded connection, avoids its weak shear strength, and greatly reduces the possibility of deformation of the fastener. Due to the setting of the receiving groove 32, the inner slip 27 can be axially limited, and the outer slip 28 is installed on the output shaft of the clamping cylinder by bolts. In this embodiment, the fastener is a fastening screw.

[0064] When the inner cava 27 is severely worn or needs to be replaced from a drill rod with a small outer diameter to a drill rod with a large outer diameter, the inner cava 27 needs to be removed. Simply retract the output shaft of the No. 2 drive member 25 completely, unscrew the fastening screws between the inner cava 27 and the outer cava 28, and the inner cava 27 can be removed. The installation steps are the opposite.

[0065] Example 3

[0066] On the basis of Example 1 or Example 2, Figure 1 and Figure 2 As shown, the tops of the front support plate 3 and the rear support plate 4 are both bolted with a reinforcing plate 34, and a limiting protrusion 35 is integrally formed at the center of the bottom of the reinforcing plate 34. The limiting protrusion 35 can be inserted into the opening, and the bottom of the limiting protrusion 35 is tangent to the cylinder where the No. 1 through hole 5 is located. The design of the reinforcing plate 34 not only ensures the overall strength of the clamp during normal construction, but also meets the space requirement of the clamp for installing large drilling tools.

[0067] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A drill rod mounting clamp comprises a base, both sides of which are provided with a No. 1 through hole for the drill rod to pass through, a swing body is provided on the base, and a clamping unit is installed on the swing body, wherein: It also includes a guide assembly, through which the swing body is rotatably connected to the base, an opening is provided on the side of the No. 1 through hole away from the frame to open the No. 1 through hole, and the opening width is greater than or equal to the diameter of the large drilling tool, and a flip part is provided on the side of the base, and the swing body can flip around the flip part and move away from the opening.

2. The drill rod mounting clamp according to claim 1, characterized in that: A driving member No. 1 is hinged on the frame, and an output shaft of the driving member No. 1 is hinged on the bottom of the swing body below the turning part.

3. The drill rod installation clamp according to claim 2, characterized in that: The guide assembly comprises a guide outer sleeve and a guide inner sleeve, the guide outer sleeve and the guide inner sleeve are detachably connected, the inner diameter of the guide outer sleeve matches the drill rod with a small outer diameter, and the inner diameter of the guide inner sleeve matches the drill rod with a large outer diameter.

4. The drill rod installation clamp according to claim 3, characterized in that: The guide outer sleeve includes a No. 1 small diameter section and a No. 1 large diameter section connected in sequence, and the guide inner sleeve includes a No. 2 small diameter section and a No. 2 large diameter section connected in sequence, the outer diameter of the No. 1 small diameter section matches the inner diameter of the No. 2 small diameter section, and the outer diameter of the No. 1 large diameter section matches the inner diameter of the No. 2 large diameter section.

5. The drill rod installation clamp according to claim 4, characterized in that: The clamping unit includes two clamping parts, which are relatively arranged on both sides of the guide sleeve. Each clamping part includes a No. 2 driving member, which is installed at the end of the swing body. A slip assembly is installed on the output shaft of the No. 2 driving member, and the slip assembly is used to clamp the drill pipe.

6. The drill rod installation clamp according to claim 5, characterized in that: The slip assembly includes an inner slip and an outer slip. The outer slip is installed on the output shaft of the second drive component. The inner slip is detachably connected to the inner side of the outer slip. The inner diameter of the inner slip matches the drill rod with a smaller outer diameter, and the inner diameter of the outer slip matches the drill rod with a larger outer diameter.

7. The drill rod installation clamp according to claim 6, characterized in that: The inner sides of the inner slip and the outer slip are both provided with a plurality of protrusions.

8. The drill rod installation clamp according to claim 7, characterized in that: The cava assembly also includes fasteners. The inner cava is fixedly connected with positioning bosses on both sides along its radial direction. The outer cava is provided with accommodating grooves on both sides along its radial direction. The accommodating grooves correspond to the positioning bosses one by one, and the positioning bosses can be inserted into the accommodating grooves. The positioning bosses are connected to the outer cava by fasteners.

9. The drill rod installation clamp according to any one of claims 5 or 8, characterized in that: The top of the base is detachably connected with a reinforcing plate, and a limiting protrusion is fixedly connected to one side of the reinforcing plate close to the opening. The limiting protrusion can be inserted into the opening, and the bottom of the limiting protrusion is tangent to the cylinder where the No. 1 through hole is located.

10. The drill rod installation clamp according to claim 9, characterized in that: The base is provided with a plurality of mounting holes for connecting with the frame.

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