Guiding clamp holder

Abstract

The utility model relates to the field of drilling machine clamping equipment, and discloses a guide clamping device which comprises a base, a swing body and two guide sleeve assemblies, the two guide sleeve assemblies are symmetrically and fixedly installed on the two sides outside the swing body, the swing body is installed on the base, the swing body comprises supporting plates which are symmetrically arranged front and back, and the two guide sleeve assemblies are arranged on the supporting plates. A guide sleeve mounting through hole is formed in the supporting plate, each guide sleeve assembly comprises an inner guide sleeve and an outer guide sleeve, the inner guide sleeve is detachably mounted in the guide sleeve mounting through hole, and the outer guide sleeve is detachably mounted on the outer side of the inner guide sleeve. According to the scheme, the problem that in the prior art, a guide sleeve is only suitable for drill rods of one specification after being assembled can be solved.

Description

Technical Field

[0001] The utility model relates to the field of drilling rig clamping equipment, in particular to a guide clamp. Background Art

[0002] The clamp and guide sleeve are both important parts of the drilling rig. The clamp is responsible for clamping the drill pipe, and cooperates with the power head to realize the connection and removal of the drill pipe joint and keep the drill pipe from slipping. During the operation of the clamp, the drill pipe needs to constantly enter and exit the clamp. Since the slips on both sides of the clamp need to be opened and closed frequently, they generally do not have a guiding function. Therefore, a guide sleeve is specially set to guide the drill pipe in and out of the clamp to prevent the drill pipe from deviating from the axis during transition and causing damage to the clamp and power head.

[0003] In the traditional drilling rig structure, the clamp and the guide sleeve are generally arranged as two independent components at the front end of the frame. The guide sleeve is fixed to the frame through a fixed seat and usually occupies a large length space (Chen Hang, Duan Xunxing. Improvement of the guide sleeve of the full hydraulic drilling rig [J]. Coal Mine Machinery, 2013, 34(05): 202-203.). Some drilling rigs used for smaller spaces or compact structure requirements have cancelled the guide sleeve (application number: 202122248947.2).

[0004] The inner sleeve of the traditional guide sleeve is a rotatable hollow cylinder. One inner sleeve can only adapt to a drill pipe with one outer diameter. After the drill rig changes the drill pipe diameter, the guide sleeve must be replaced as a whole or the inner sleeve must be replaced separately to adapt to the outer diameter of the new drill pipe. Replacing the guide sleeve as a whole is relatively simple, but the spare parts cost is relatively high; replacing the inner sleeve separately is low-cost, but relatively complicated, and is currently the method commonly used on site. However, replacing the inner sleeve separately still has the problem of difficult identification and management of accessories. Since the specifications of several drill pipes used in the same drilling rig are similar, the diameter difference of the drill pipe is generally about 10mm, which is reflected in the thickness difference of the inner sleeve of only a few millimeters. It is very difficult to identify such a small difference without a diameter measuring tool at the underground site, and the resulting on-site accessory management is also relatively difficult. In addition, the existing clamp structure is relatively complex, and it is difficult to replace parts directly on the drilling rig. The overall size of the clamp is large, the weight is heavy, and it is difficult to remove directly, which makes the on-site maintenance of the clamp difficult and time-consuming.

[0005] In general, the existing drill rig clamps and guide sleeves have the following problems: 1. The guide sleeve and the clamp are two independent components, which require a large installation space and result in a longer drill rig frame; 2. After the guide sleeve is assembled, it can only be used for drill rods of one specification; 3. The inner sleeves of guide sleeves of different specifications are difficult to identify on-site in the coal mine; 4. The clamp is difficult to disassemble as a whole, and on-site maintenance is relatively difficult. Utility Model Content

[0006] The utility model aims to provide a guide clamp to solve the problem that the guide sleeve in the prior art can only be used for a drill rod of one specification after being assembled.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A guide clamp comprises a base, a swinging body and two guide sleeve assemblies, wherein the two guide sleeve assemblies are symmetrically fixedly mounted on both sides of the outer side of the swinging body, the swinging body is rotatably connected via the guide sleeve assemblies, the swinging body comprises a support plate symmetrically arranged front and back, the support plate is provided with a guide sleeve mounting through hole, each of the guide sleeve assemblies comprises an inner guide sleeve and an outer guide sleeve, the inner guide sleeve is detachably mounted in the guide sleeve mounting through hole, and the outer guide sleeve is detachably mounted on the outer side of the inner guide sleeve.

[0009] The principle of this scheme is:

[0010] In actual application, the front and rear ends of the clamp are provided with inner and outer guide sleeves. When the drill rod enters or exits the clamp, the guide sleeve limits the deviation of the drill rod in the circumferential direction, ensuring that the drill rod is always within the range that can be clamped by the clamp, and protecting the clamp and the drilling rig power head from damage caused by excessive deviation of the drill rod. When it is necessary to clamp a drill rod with a smaller outer diameter, the outer guide sleeve and the inner guide sleeve are installed on the clamp at the same time, and the outer guide sleeve is installed on the outside of the inner guide sleeve, and the drill rod contacts the inner diameter of the outer guide sleeve (the inner diameter of the outer guide sleeve matches the drill rod with the smaller outer diameter applicable to the drilling rig); when it is necessary to clamp a drill rod with a larger outer diameter, the outer guide sleeve is removed, and the inner guide sleeve is used to clamp the drill rod, and the drill rod contacts the inner diameter of the inner guide sleeve (the small diameter section of the inner diameter of the inner guide sleeve matches the drill rod with the larger outer diameter applicable to the drilling rig).

[0011] The advantages of this solution are:

[0012] 1. This solution is equipped with nested inner and outer guide sleeves, which can be applied to drill rods with two different outer diameters after assembly. When a drill rod with a different outer diameter needs to be replaced, only the outer guide sleeve needs to be removed or installed. The replacement process is very convenient and quick, and there is no need to disassemble the entire clamp to replace parts.

[0013] 2. Integrating the guide sleeve directly into the clamp can effectively save installation space and make the overall layout of the drilling rig more compact;

[0014] 3. By matching the inner and outer slips with the inner and outer guide sleeves, the clamping of two drill rods with different diameters can be more adaptable and stable.

[0015] Preferably, as an improvement, the outer diameter and inner diameter of the inner guide sleeve are divided into two levels, large and small. The small diameter section of the outer diameter of the inner guide sleeve can be removably installed in the guide sleeve installation hole, the small diameter section of the inner diameter of the inner guide sleeve is a through hole, and the large diameter section of the inner diameter is a countersunk stage; the outer diameter of the outer guide sleeve is divided into two levels, large and small, and the inner diameter is a through hole. The small diameter section of the outer guide sleeve can be removably installed in the through hole of the inner guide sleeve, and the large diameter section can be removably installed in the countersunk stage of the inner diameter of the inner guide sleeve.

[0016] The drill rod with a smaller outer diameter matches the inner diameter of the outer guide sleeve, and the drill rod with a larger outer diameter matches the inner diameter of the inner guide sleeve. The inner and outer diameters of the inner guide sleeve are divided into large and small levels, and the large diameter section of the inner diameter is the countersunk stage. The outer guide sleeve is only divided into large and small levels in terms of the outer diameter, and there is no difference in the size of the inner diameter. The appearance of the inner and outer guide sleeves is quite different. Users can easily distinguish between the inner and outer guide sleeves at the installation site, which is convenient for on-site accessory management and identification.

[0017] Preferably, as an improvement, it further includes two cava assemblies, which are symmetrically installed on both sides of the swing body, and each cava assembly includes an inner cava and an outer cava, the outer cava is slidably installed in the swing body, and the inner cava is detachably installed on the inner side of the outer cava.

[0018] Internal slips are used to clamp drill rods with smaller outer diameters, while external slips are used to clamp drill rods with larger outer diameters.

[0019] Preferably, as an improvement, the front projection of the inner cava is a cross shape, the main body in the middle section of the cross section is an arc, and bosses are provided on both sides of the arc body. The main body of the outer cava facing the inner cava is an arc shape, and the upper and lower sides of the arc-shaped main body are provided with a flat surface for cooperating with the boss of the inner cava. A clamping block is provided at each of the four corners of the outer cava plane, and the left and right stop planes of the four clamping blocks of the outer cava are combined with the arc-shaped main body to form an inner cava installation space. The outer diameter of the inner cava and the inner diameter of the outer cava match each other, and the inner surfaces of the outer cava and the inner cava are provided with a number of protrusions or sharp teeth.

[0020] The arc-shaped bodies of the inner and outer slips are installed correspondingly, the boss and the plane are installed correspondingly, and the four blocks of the outer slip complete the axial positioning of the inner slip by limiting the axial movement of the boss to prevent the axial movement of the inner slip during use. The protrusions or sharp teeth on the inner surfaces of the inner and outer slips are used to increase the friction between the slips and the drill pipe to prevent relative sliding when clamping the drill pipe.

[0021] Preferably, as an improvement, it further includes a clamping cylinder, the swing body also includes a cylinder mounting plate, the cylinder mounting plate is arranged on the outer end surfaces on both sides of the swing body, the clamping cylinder is fixedly connected to the cylinder mounting plate, and the piston rod of the clamping cylinder is fixedly connected to the external cava.

[0022] The clamping cylinder and the slip assembly together constitute the clamping mechanism of the clamp. The slip assembly is a bilaterally symmetrical structure and is a direct part for clamping the drill rod. The clamping cylinder is the power element for clamping the drill rod. When the drill rod needs to be clamped or released, the piston rod of the clamping cylinder extends or retracts, driving the slip assembly connected to the piston rod to close or open, so that the drill rod is clamped or released.

[0023] Preferably, as an improvement, the base comprises a symmetrically arranged front support plate and a rear support plate, a through hole is opened in the middle of the front support plate and the rear support plate, and a large diameter section of the outer diameter of the inner guide sleeve is rotatably arranged in the through hole.

[0024] The base is the main bearing member of the clamp and the mounting support member of other parts. The front support plate and the rear support plate are the main plate members of the swing body and the guide sleeve. When the swing body performs a swinging operation, the inner guide sleeve is the central axis, and the large diameter section of the outer guide sleeve rotates relative to the through holes of the front support plate and the rear support plate, thereby ensuring the rotational freedom of the swing body along the circumference of the inner guide sleeve.

[0025] Preferably, as an improvement, the swing body further comprises four lining plates, which are symmetrically installed up and down and left and right between supporting plates symmetrically arranged front and back to form a guide space for clamping the cylinder piston rod and the movement of the cava.

[0026] The four lining plates are located in pairs on the upper and lower sides of the slips and the clamping cylinder. The two lining plates on the same side are installed symmetrically. The space formed between the lining plates on the upper and lower sides is just at the installation position of the clamping cylinder piston rod and the slips. The clamping cylinder piston rod moves telescopically in the space and drives the slips to reciprocate at the same time. The upper and lower widths of the space are equivalent to the width of the slips, which can provide a certain guiding effect for the slips when they move.

[0027] Preferably, as an improvement, the base further comprises a mounting plate, and the mounting plate is fixedly mounted on the bottom of the base.

[0028] The mounting plate is used to secure the base to the drill rig frame.

[0029] Preferably, as an improvement, the end surface of the large diameter section of the outer guide sleeve is provided with a countersunk through hole, and the bottom surface of the countersunk stage of the inner guide sleeve is provided with a through hole corresponding to the countersunk through hole of the outer guide sleeve.

[0030] The threaded connector passes through the countersunk through hole of the outer guide sleeve and the corresponding through hole of the inner guide sleeve to fix the outer guide sleeve and the inner guide sleeve on the swing body.

[0031] Preferably, as an improvement, it also includes a swing cylinder pendulum and a swing ear seat, the lower part of the cylinder mounting plate on one side is fixedly connected to the swing ear seat, and the piston rod of the swing cylinder is hinged to the swing ear seat.

[0032] The swing cylinder is a driving element that drives the swing body of the clamp to swing or rotate. Its piston rod is hinged to the swing ear seat through a pin. When the piston rod is extended, the left end of the clamp is lowered and the right end is raised; when the piston rod is retracted, the left end of the clamp is raised and the right end is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an axonometric view of an embodiment of the utility model;

[0034] Figure 2 It is a front view of an embodiment of the utility model;

[0035] Figure 3 for Figure 2 Middle AA section view;

[0036] Figure 4 is a schematic diagram of the structure of the base;

[0037] Figure 5 It is a structural schematic diagram of the outer guide sleeve;

[0038] Figure 6 It is a structural schematic diagram of the swing body;

[0039] Figure 7 It is a structural schematic diagram of the inner guide sleeve;

[0040] Figure 8 for Figure 7 AA section view;

[0041] Fig. 9 This is a schematic diagram of the structure of the inner Cava;

[0042] Fig.10 This is a schematic diagram of the structure of the outer slip. DETAILED DESCRIPTION

[0043] The following is further described in detail through specific implementation methods:

[0044] The figure marks in the drawings of the specification include: base 1, mounting plate 101, front support plate 102, rear support plate 103, outer guide sleeve 2, swing body 3, support plate 301, cylinder mounting plate 302, lining plate 303, swing ear seat 304, clamping cylinder 4, cava assembly 5, inner cava 501, outer cava 502, swing cylinder 6, inner guide sleeve 8.

[0045] The embodiment is basically as shown in the attached Figure 1-10 As shown:

[0046] like Figure 1As shown, a guide clamp comprises a base 1, a swing body 3, a swing cylinder 6, two guide sleeve assemblies, two slip assemblies 5, and two clamping cylinders 4. The two guide sleeve assemblies are symmetrically and detachably fixed on the front and rear sides of the swing body 3. The swing body 3 is rotatably set on the base 1 through the guide sleeve assembly, the swing cylinder 6 is installed on the right side of the swing body 3, and the slip assembly 5 and the clamping cylinder 4 are installed on the left and right sides of the swing body 3.

[0047] like Figure 4 As shown, the base 1 includes a mounting plate 101, a front support plate 102, and a rear support plate 103. The bottom of the base 1 is a fixed mounting plate 101, and the front support plate 102 and the rear support plate 103 are symmetrically arranged at the front and rear ends of the base 1. The two are the main supporting plate members of the clamp, and through holes are opened in the middle of the front support plate 102 and the rear support plate 103.

[0048] like Figure 6 As shown, the swing body 3 includes a support plate 301, a cylinder mounting plate 302, a lining plate 303, and a swing ear seat 304. There are two support plates 301, which are symmetrically arranged front and back, and each support plate 301 is provided with a guide sleeve mounting through hole; there are two cylinder mounting plates 302, which are arranged on the outer end surfaces on the left and right sides of the swing body 3, and are used to install the clamping cylinder 4; the swing ear seat 304 is fixedly connected to the cylinder mounting plate 302 on the right side, and is used to install the pin connecting the piston rod of the swing cylinder 6; four lining plates 303 are symmetrically arranged up and down and left and right between the two symmetrical support plates 301, which not only form a guide space for the movement of the piston rod of the clamping cylinder 4 and the slip 5, but also play a structural support role.

[0049] like Figure 5 , 7 As shown in , 8, the guide sleeve assembly includes an inner guide sleeve 8 and an outer guide sleeve 2. There are two inner guide sleeves 8 and two outer guide sleeves 2, which are symmetrically installed on the front and rear sides of the clamp. The outer diameter and inner diameter of the inner guide sleeve 8 are divided into large and small levels. The small diameter section of the outer diameter of the inner guide sleeve 8 can be detachably installed in the guide sleeve installation through hole of the swing body 3, and the large diameter section of the outer diameter of the inner guide sleeve 8 is rotatably connected with the through holes of the front support plate 102 and the rear support plate 103; the small diameter section of the inner diameter of the inner guide sleeve 8 is a through hole, and the large diameter section of the inner diameter is a countersunk stage; the outer guide sleeve 8 is a plurality of outer guide sleeves, each of which ... The outer diameter of the sleeve 2 is in two levels, large and small, and the inner diameter is a through hole. The small diameter section of the outer guide sleeve 2 can be removably installed in the through hole of the inner guide sleeve 8, and the large diameter section can be removably installed in the countersunk stage of the inner diameter of the inner guide sleeve 8; the through hole of the outer guide sleeve 2 provides a certain guiding effect for the drill rod and limits the circumferential deviation of the drill rod. The end face of the large diameter section of the outer guide sleeve 2 is provided with a countersunk through hole, and the bottom surface of the countersunk stage of the inner guide sleeve 8 is provided with a through hole corresponding to the countersunk through hole of the outer guide sleeve 2. The outer guide sleeve 2 and the inner guide sleeve 8 are fixed to the swing body 3 by screws.

[0050] like Figure 1 , 2As shown in Figures 3, 9, and 10, the clamping cylinder 4 and the slip assembly 5 are the main mechanisms for clamping the drill pipe. There are two clamping cylinders 4 and two slip assemblies 5. The two slip assemblies are symmetrically installed on both sides of the swing body. Each slip assembly 5 includes an inner slip 501 and an outer slip 502. The outer diameter of the inner slip 501 and the inner diameter of the outer slip 502 match each other. The inner diameter of the inner slip 501 matches the outer diameter of the smaller drill pipe, and the inner diameter of the outer slip 502 matches the outer diameter of the larger drill pipe. The front projection of the inner slip 501 is a cross shape, and the main body in the middle section of the cross section is an arc. Bosses are provided on the upper and lower sides of the arc main body, and the bosses are symmetrically distributed. The two symmetrical inner slips 501 form a sliding guide cavity for clamping the drill pipe. The inner slip 501 is positioned along the front and rear axial direction of the clamp by cooperating with the stop plane corresponding to the outer slip 502 through four symmetrical positioning surfaces. The main body of the outer slip 502 facing the inner slip 501 is in an arc shape, and the upper and lower sides of the arc-shaped main body are provided with a plane for cooperating with the boss of the inner slip 501. A clamping block is provided at each of the four corners of the plane of the outer slip 502, and the four symmetrical stop planes of the clamping blocks are combined with the arc-shaped main body to form the installation space of the inner slip 501. The cylinder barrels of the two clamping cylinders 4 are symmetrically fixedly connected to the two cylinder mounting plates 302, and the piston rod of the clamping cylinder 4 is fixedly connected to the outer slip 502. The inner slip 501 can be detachably installed on the inner side of the outer slip 502 to realize the clamping drive of the clamping cylinder 4 on the slip assembly 5. The inner surfaces of the outer slip 502 and the inner slip 501 are provided with a plurality of protrusions or sharp teeth.

[0051] like Figure 1 As shown, the swing cylinder 6 is a driving element that drives the clamp swing body 3 to rotate around the inner guide sleeve 8. The piston rod of the swing cylinder 6 is hinged to the swing ear seat 304 through a pin, and the cylinder barrel is hinged to the frame of the drilling rig through a pin.

[0052] In actual use, when it is necessary to clamp a drill rod with a smaller outer diameter, an inner guide sleeve 8 and an outer guide sleeve 2 are provided at the front and rear ends of the clamp, and the inner slip 501 and the outer slip 502 are installed on the swing body 3. The drill rod enters the clamp from the through hole of the outer guide sleeve 2, and the piston rod of the clamping cylinder 4 moves to both sides of the clamp, driving the two slip assemblies 5 to separate at the same time, and the drill rod enters the gap formed by the separation of the slip assemblies 5. After the drill rod is in place, the piston rod of the clamping cylinder 4 moves to the middle of the clamp , and at the same time drive the two slip assemblies 5 to close and clamp the drill rod; when it is necessary to clamp a drill rod with a larger outer diameter, unscrew the fixing bolts on the outer guide sleeve 2, remove the outer guide sleeve 2, screw the fixing bolts into the through holes on the bottom surface of the countersunk stage of the inner guide sleeve 8, fix the inner guide sleeve 8 on the swing body 3, remove the inner slip 501, and the drill rod enters the clamp from the small diameter section of the inner diameter of the inner guide sleeve 8. The subsequent installation steps of the piston rod of the clamping cylinder 4 and the slip 5 are the same as those for the drill rod with a smaller outer diameter.

[0053] When the swing body 3 needs to be rotated (such as pre-loosening the drill pipe joint, the drill pipe in the clamp needs to produce a small angle relative rotation with the drill pipe in the power head, and the rotation speed of the power head is fast, and it is difficult to control the rotation angle, so it is easier to control the swing of the clamp to produce a certain angle difference), the swing cylinder 6 is driven to make the swing body 3 reciprocate with the inner guide sleeve 8 as the central axis during the extension or retraction action of the piston rod of the swing cylinder 6.

[0054] 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, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention 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 guide clamp, comprising a base, characterized in that: It also includes a swinging body and two guide sleeve assemblies, which are symmetrically fixed on both sides of the outer side of the swinging body. The swinging body is rotatably connected through the guide sleeve assemblies. The swinging body includes a support plate symmetrically arranged front and back, and a guide sleeve mounting through hole is provided on the support plate. Each guide sleeve assembly includes an inner guide sleeve and an outer guide sleeve. The inner guide sleeve is detachably mounted in the guide sleeve mounting through hole, and the outer guide sleeve is detachably mounted on the outside of the inner guide sleeve.

2. A guide clamp according to claim 1, characterized in that: The outer diameter and inner diameter of the inner guide sleeve are divided into two levels, large and small. The small diameter section of the outer diameter of the inner guide sleeve can be removably installed in the guide sleeve installation hole, the small diameter section of the inner diameter of the inner guide sleeve is a through hole, and the large diameter section of the inner diameter is a countersunk stage; the outer diameter of the outer guide sleeve is divided into two levels, large and small, and the inner diameter is a through hole. The small diameter section of the outer guide sleeve can be removably installed in the through hole of the inner guide sleeve, and the large diameter section can be removably installed in the countersunk stage of the inner diameter of the inner guide sleeve.

3. A guide clamp according to claim 2, characterized in that: It also includes two slip assemblies, which are symmetrically installed on both sides of the swing body. Each slip assembly includes an inner slip and an outer slip. The outer slip is slidably installed in the swing body, and the inner slip is detachably installed on the inner side of the outer slip.

4. A guide clamp according to claim 3, characterized in that: The front projection of the inner cava is a cross shape, and the main body in the middle section of the cross section is an arc, with bosses on both sides of the arc body. The main body of the outer cava facing the inner cava is an arc, and the upper and lower sides of the arc-shaped main body are provided with a flat surface for cooperating with the boss of the inner cava. A clamping block is provided at each of the four corners of the outer cava plane, and the stop planes on the left and right of the four clamping blocks of the outer cava are combined with the arc-shaped main body to form an inner cava installation space. The outer diameter of the inner cava and the inner diameter of the outer cava match each other, and the inner surfaces of the outer cava and the inner cava are provided with a number of protrusions or sharp teeth.

5. A guide clamp according to claim 4, characterized in that: It also includes a clamping cylinder, and the swing body also includes a cylinder mounting plate, which is arranged on the outer end surfaces on both sides of the swing body. The clamping cylinder is fixedly connected to the cylinder mounting plate, and the piston rod of the clamping cylinder is fixedly connected to the external slip.

6. A guide clamp according to claim 5, characterized in that: The base comprises a front support plate and a rear support plate which are symmetrically arranged. A through hole is opened in the middle of the front support plate and the rear support plate. The large diameter section of the outer diameter of the inner guide sleeve is rotatably arranged in the through hole.

7. A guide clamp according to claim 6, characterized in that: The swing body also includes four lining plates, which are symmetrically installed up and down and left and right between supporting plates symmetrically arranged front and back to form a guide space for the movement of the clamping cylinder piston rod and the slip assembly.

8. A guide clamp according to claim 7, characterized in that: The base also includes a mounting plate, and the mounting plate is fixedly mounted on the bottom of the base.

9. A guide clamp according to claim 8, characterized in that: The end surface of the large diameter section of the outer guide sleeve is provided with a countersunk through hole, and the bottom surface of the countersunk stage of the inner guide sleeve is provided with a through hole corresponding to the countersunk through hole of the outer guide sleeve.

10. A guide clamp according to claim 9, characterized in that: It also includes a swing oil cylinder and a swing ear seat. The lower part of the oil cylinder mounting plate on one side is fixedly connected to the swing ear seat, and the piston rod of the swing oil cylinder is hinged to the swing ear seat.

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