Casing running device

Abstract

The present invention relates to the field of casing in mines, and in particular to a casing device, comprising a mounting seat, a guide tube arranged on one side of the mounting seat, two ends of the guide tube being connected, a clamping bar being hingedly arranged on the guide tube, the clamping bar being driven by a driving mechanism arranged on the mounting seat or the guide tube, and the clamping bar swinging to the inside of the guide tube to clamp the casing in the guide tube. The present invention has the advantages of being able to prevent the casing from falling down due to gravity and injuring people, thereby improving the safety of casing installation.

Description

Technical Field

[0001] The invention relates to the field of casing installation in mines, and in particular to a casing installation device. Background Art

[0002] In the construction of the fully mechanized mining face, the large-diameter top plate is drilled in the direction of the hole. In the past, the sealing process was to drill holes in the roof of the fully mechanized mining face.

[0003] 73mm core tubes are connected by pipe clamps. Although the straightening effect is good, the flexibility is poor. When the working face is mined past the end hole position of the borehole, the broken rock in the hole enters the core tube, and the gas extraction channel is blocked, resulting in poor extraction effect. In order to solve this technical problem, after analyzing the sealing materials and casing methods of previous drilling holes, a large-aperture top plate drilling casing technology was developed, which is the Chinese invention patent with application number CN201910226342.8 for drilling gas. The extraction casing uses a Φ76.1mm homemade plug-in casing, which is connected by plugging. There are a large number of gas extraction channels between the casing's own eyes, joints and the hole wall, and the gas around the borehole is continuously extracted. Because the diameter of the Φ76.1mm homemade plug-in casing is larger than the diameter of the clamp in front of the drilling rig, the casing cannot be lowered into the hole through the drilling rig. Therefore, a drill rod is used to push the casing into the hole. However, during the casing lowering, the casing in the hole may fall down due to its own weight and injure people, and the safety is poor. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the casing is easy to run downward and the safety is poor when the casing is lowered in the prior art.

[0005] The present invention solves the above-mentioned technical problems through the following technical means: a casing lowering device includes a mounting seat, a guide tube is arranged on one side of the mounting seat, the two ends of the guide tube are connected, a clamping bar is hingedly arranged on the guide tube, the clamping bar is driven by a driving mechanism arranged on the mounting seat or the guide tube, and the clamping bar swings to the inside of the guide tube to clamp the casing in the guide tube.

[0006] When a casing lowering device in the present invention is used in practice, the entire device can be used in conjunction with a drilling rig. The entire device is installed on a drilling rig clamp through a mounting seat, and then a guide tube is inserted into the borehole. The casing to be installed is placed in the guide tube, and the drill rod of the drilling rig is extended to push the casing into the borehole. Subsequently, a driving mechanism drives the clamping bar to swing to the inside of the guide tube to clamp the casing in the guide tube, thereby preventing the casing from falling down due to gravity and injuring people, thereby improving the safety of casing lowering.

[0007] Optimally, the mounting seat is in the shape of a flat plate, the guide tube is perpendicular to the mounting seat, and a mounting hole is provided on the mounting seat. During actual installation, the entire device can be installed on the drilling rig holder by connecting the bolts through the mounting holes and nuts, with a simple structure and reliable connection.

[0008] Optimally, when the sleeve is lowered, the moving direction of the sleeve is backward, a placement hole is opened on one side of the guide tube, the placement hole is located in front of the clamping bar, and the size of the placement hole is sufficient to place the sleeve in the guide tube.

[0009] Optimally, the hinge axis of the clamping strip is perpendicular to the axis of the guide tube.

[0010] Optimally, the driving mechanism comprises a telescopic driving member and a driving connecting rod;

[0011] The first end of the telescopic driving member is hinged on the mounting seat or the guide tube, the second end of the telescopic driving member is hinged to the first end of the driving connecting rod, the second end of the driving connecting rod is hinged to the hinge axis of the clamping strip, and all the above hinge axes are parallel;

[0012] A tightening portion is arranged on the driving connecting rod, and the tightening portion is located outside the clamping strip.

[0013] The telescopic driving member drives the driving connecting rod to swing, the pressing part presses against the outside of the clamping strip, and the clamping strip swings inward, thereby pressing the sleeve into the guide tube.

[0014] Optimally, the telescopic drive member adopts a hydraulic cylinder, a pneumatic cylinder or a push rod motor.

[0015] Optimally, the first end of the clamping strip is hinged in the side wall of the guide tube, and the inner side of the second end of the clamping strip is an arc that matches the outer wall of the sleeve. The arc-shaped end of the clamping strip can well match the outer wall of the sleeve, thereby tightly clamping it, and the clamping is more reliable.

[0016] Optimally, the first end of the clamping strip is hinged in the side wall of the guide tube, and a rubber pad is arranged inside the second end of the clamping strip. The friction between the rubber pad and the sleeve is relatively large, which can ensure firm clamping and prevent downward movement.

[0017] Optimally, when the casing is lowered, the moving direction of the casing is backward, the front end of the clamping bar is hinged in the side wall of the guide tube, and the length of the clamping bar is greater than the inner diameter of the guide tube. The front end of the clamping bar is hinged in the side wall of the guide tube, and the length of the clamping bar is set to be greater than the inner diameter of the guide tube, which can ensure that the clamping bar is always located at the rear side of its hinge axis when swinging, thereby ensuring that the casing can smoothly enter the drill hole when the casing is lowered.

[0018] Optimally, the first end of the clamping strip is hinged in the side wall of the guide tube, and a blocking portion is provided on the side wall of the guide tube at a position corresponding to the second end of the clamping strip. The thickness of the clamping strip is smaller than the side wall of the guide tube. The clamping strip swings outward to the blocking portion, and the clamping strip is located within the thickness range of the side wall of the guide tube.

[0019] The clamping strip swings outward to the blocking portion, and the clamping strip is located within the thickness range of the side wall of the guide tube, which can ensure that the clamping strip does not protrude from the outside of the guide tube, thereby ensuring that the guide tube can be smoothly installed in the drilled hole.

[0020] The advantages of the present invention are:

[0021] 1. When a casing lowering device in the present invention is actually used, the entire device can be used in conjunction with a drilling rig. The entire device is installed on a drilling rig clamp through a mounting seat, and then a guide tube is inserted into the borehole. The casing to be installed is placed in the guide tube, and the drill rod of the drilling rig is extended to push the casing into the borehole. Subsequently, a driving mechanism drives the clamping bar to swing to the inside of the guide tube to clamp the casing in the guide tube, thereby preventing the casing from falling down due to gravity and injuring people, thereby improving the safety of casing lowering.

[0022] 2. During actual installation, the entire device can be installed on the drill rig holder by connecting the bolts through the mounting holes and nuts. The structure is simple and the connection is reliable.

[0023] 3. The telescopic driving member drives the driving connecting rod to swing, the pressing part presses against the outside of the clamping strip, and the clamping strip swings inward, thereby pressing the sleeve into the guide tube.

[0024] 4. The arc-shaped end of the clamping strip can cooperate well with the outer wall of the sleeve, thereby clamping it tightly, and the clamping is more reliable.

[0025] 5. The friction between the rubber pad and the sleeve is large, which can ensure firm clamping and prevent downward movement.

[0026] 6. The front end of the clamping strip is hinged in the side wall of the guide tube, and the length of the clamping strip is set to be larger than the inner diameter of the guide tube, which can ensure that the clamping strip is always located behind its hinge axis when swinging, thereby ensuring that the casing can smoothly enter the drill hole when the casing is lowered.

[0027] 7. The clamping strip swings outward to the blocking portion, and the clamping strip is located within the thickness range of the side wall of the guide tube, which can ensure that the clamping strip does not protrude from the outside of the guide tube, thereby ensuring that the guide tube can be smoothly installed in the drilled hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of the casing running device in the embodiment of the present invention (non-clamping state);

[0029] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0030] Figure 3 It is a left side view of the casing running device in the embodiment of the present invention;

[0031] Figure 4 It is a front view of the casing running device in the embodiment of the present invention (clamping state);

[0032] Figure 5 for Figure 4 A partial enlarged view of B in the middle;

[0033] in,

[0034] Mounting seat-1, mounting hole-11;

[0035] Guide tube-2, placement hole-21, blocking part-22, hinged ear-23;

[0036] Clamping bar-3;

[0037] Driving mechanism-4, telescopic driving member-41, driving connecting rod-42, tightening part-421;

[0038] Casing -5. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, a casing lowering device includes a mounting seat 1, a guide pipe 2, a clamping bar 3, and a driving mechanism 4.

[0041] like Figure 1 As shown, a guide tube 2 is arranged on one side of the mounting seat 1, and both ends of the guide tube 2 are connected. A clamping bar 3 is hingedly arranged on the guide tube 2, and the clamping bar 3 is driven by a driving mechanism 4 arranged on the mounting seat 1 or the guide tube 2. The clamping bar 3 swings to the inside of the guide tube 2 to clamp the sleeve 5 in the guide tube 2.

[0042] Working principle:

[0043] like Figure 1As shown, in actual application, a casing lowering device of the present invention can be used in conjunction with a drilling rig. The entire device is mounted on a drilling rig holder through a mounting base 1, and then a guide tube 2 is inserted into a borehole. A casing 5 to be installed is placed in the guide tube 2. A drill rod 6 of the drilling rig is extended, and the casing 5 is pushed into the borehole. Figure 4 , 5 As shown, the driving mechanism 4 then drives the clamping bar 3 to swing into the guide tube 2 to clamp the sleeve 5 in the guide tube 2, thereby preventing the sleeve 5 from falling down due to gravity and injuring people, thereby improving the safety of lowering the sleeve 5.

[0044] For the convenience of description and understanding, the moving direction of the sleeve 5 is described later when the sleeve 5 is used below, and other directions are based on this. The above limitation is only for the convenience of understanding and description and cannot be understood as a limitation of the present invention.

[0045] like Figure 1 , 3 As shown, the mounting seat 1 is in the shape of a flat plate, the guide tube 2 is perpendicular to the mounting seat 1 , a mounting hole 11 is provided on the mounting seat 1 , and the guide tube 2 is welded to the rear side of the mounting seat 1 .

[0046] like Figure 1 , 3 As shown, a placement hole 21 is opened on the upper side of the front end of the guide tube 2 , the placement hole 21 is located in front of the clamping strip 3 , and the size of the placement hole 21 is sufficient to place the sleeve 5 in the guide tube 2 .

[0047] like Figure 1 As shown, the hinge axis of the clamping bar 3 is perpendicular to the axis of the guide tube 2, and the front end of the clamping bar 3 is hinged in the side wall of the guide tube 2. In this embodiment, the hinge axis of the clamping bar 3 is along the horizontal direction, and the inner side of the rear end of the clamping bar 3 is an arc that matches the outer wall of the sleeve 5 (not shown in the figure). A rubber pad (not shown in the figure) is arranged on the inner side of the rear end of the clamping bar 3, and the rubber pad is installed on the inner side of the rear end of the clamping bar 3 by gluing or fixing with screws.

[0048] In this embodiment, the length of the clamping strip 3 is greater than the inner diameter of the guide tube 2. Figure 2 As shown, a blocking portion 22 is provided on the side wall of the guide tube 2 at a position corresponding to the rear end of the clamping strip 3, the thickness of the clamping strip 3 is smaller than the side wall of the guide tube 2, the clamping strip 3 swings outward to the blocking portion 22, and the clamping strip 3 is located within the thickness range of the side wall of the guide tube 2. The blocking portion 22 described in this embodiment is not limited to a specific shape, and it is sufficient that it can block the clamping strip 3 and make it located within the thickness range of the side wall of the guide tube 2. The blocking portion 22 described in this embodiment is stepped, and the rear end of the clamping strip 3 is stepped to match it.

[0049] like Figure 1As shown, the driving mechanism 4 includes a telescopic driving member 41 and a driving connecting rod 42; the telescopic driving member 41 adopts a hydraulic cylinder, a cylinder or a push rod motor, and the front end of the telescopic driving member 41 is hinged on the mounting seat 1 or the guide tube 2. In this embodiment, a hinge ear 23 is provided below the front end of the guide tube 2, and the front end of the telescopic driving member 41 is hinged on the hinge ear 23. The rear end of the telescopic driving member 41 is hinged to the first end of the driving connecting rod 42, and the second end of the driving connecting rod 42 is hinged to the hinge axis of the clamping bar 3, and all the above hinge axes are parallel. A tightening portion 421 is provided on the driving connecting rod 42, and the tightening portion 421 is located on the outside of the clamping bar 3. The tightening portion 421 is not limited to a specific shape, and can support and push the clamping bar 3 to swing toward the inside of the guide tube 2 when the driving connecting rod 42 swings toward the clamping bar 3. In this embodiment, the tightening portion 421 is located on the side of the clamping bar 3 facing the end of the driving connecting rod 42 hinged at the front end of the clamping bar 3.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing running device, characterized in that: The invention comprises a mounting seat (1), a guide tube (2) is arranged on one side of the mounting seat (1), two ends of the guide tube (2) are connected, a clamping strip (3) is hingedly arranged on the guide tube (2), the clamping strip (3) is driven by a driving mechanism (4) arranged on the mounting seat (1) or the guide tube (2), and the clamping strip (3) swings into the inside of the guide tube (2) to clamp the sleeve (5) in the guide tube (2); The driving mechanism (4) comprises a telescopic driving member (41) and a driving connecting rod (42); The first end of the telescopic driving member (41) is hinged on the mounting seat (1) or the guide tube (2), the second end of the telescopic driving member (41) is hinged to the first end of the driving connecting rod (42), and the second end of the driving connecting rod (42) is hinged to the hinge shaft of the clamping bar (3); The driving connecting rod (42) is provided with a tightening portion (421), and the tightening portion (421) is located outside the clamping strip (3); The first end of the clamping strip (3) is hinged in the side wall of the guide tube (2); a blocking portion (22) is provided on the side wall of the guide tube (2) at a position corresponding to the second end of the clamping strip (3); the thickness of the clamping strip (3) is smaller than the side wall of the guide tube (2); the clamping strip (3) swings outward to the blocking portion (22); the clamping strip (3) is located within the thickness range of the side wall of the guide tube (2); when the sleeve (5) is lowered, the movement direction of the sleeve (5) is backward; a placement hole (21) is provided on one side of the guide tube (2); the placement hole (21) is located in front of the clamping strip (3), and the size of the placement hole (21) is sufficient to place the sleeve (5) in the guide tube (2).

2. The casing running device according to claim 1, characterized in that: The mounting seat (1) is in the shape of a flat plate, the guide tube (2) is perpendicular to the mounting seat (1), and a mounting hole (11) is provided on the mounting seat (1).

3. The casing running device according to claim 1, characterized in that: The hinge axis of the clamping strip (3) is perpendicular to the axis of the guide tube (2).

4. The casing running device according to claim 1, characterized in that: The telescopic driving member (41) is a hydraulic cylinder, a pneumatic cylinder or a push rod motor.

5. The casing running device according to any one of claims 1 to 4, characterized in that: The first end of the clamping strip (3) is hinged in the side wall of the guide tube (2), and the inner side of the second end of the clamping strip (3) is in an arc shape that matches the outer wall of the sleeve (5).

6. The casing running device according to any one of claims 1 to 4, characterized in that: The first end of the clamping strip (3) is hinged in the side wall of the guide tube (2), and a rubber pad is arranged inside the second end of the clamping strip (3).

7. The casing running device according to any one of claims 1 to 4, characterized in that: The length of the clamping strip (3) is greater than the inner diameter of the guide tube (2).

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