CN109882096B - Jaw type water feeder and construction method thereof - Google Patents
Jaw type water feeder and construction method thereof Download PDFInfo
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- CN109882096B CN109882096B CN201910039342.7A CN201910039342A CN109882096B CN 109882096 B CN109882096 B CN 109882096B CN 201910039342 A CN201910039342 A CN 201910039342A CN 109882096 B CN109882096 B CN 109882096B
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Abstract
The invention discloses a jaw type water feeder and a construction method thereof, wherein the jaw type water feeder comprises a mandrel, a bearing and a bearing sleeve which are coaxially and sequentially arranged from inside to outside, and a high-pressure water interface is arranged on the side wall of the mandrel; the high-pressure water interface is communicated with the force transmission hollow shaft in a sealing way; the closed end of the force transmission hollow shaft is provided with a rotating handle, and the open end of the force transmission hollow shaft is sequentially provided with an annular piston and a clamping jaw along the axial direction; the claw comprises a cylindrical part and elastic claw sheets sequentially arranged at intervals along the circumferential direction of the cylindrical part, and the end parts of the elastic claw sheets are claw sheet wedge-shaped surfaces; a jaw sleeve is coaxially sleeved on the outer wall of the jaw, and one end of the jaw sleeve is fixedly connected to the end part of the bearing sleeve through a piston cylinder barrel; the inner wall of the other end of the claw sleeve is a wedge-shaped inner wall matched with the wedge-shaped surface of the claw sheet, and a ball is arranged between the wedge-shaped surface of the claw sheet and the wedge-shaped inner wall. The invention can realize the instant disassembly and assembly of the water feeder and the drill rod, has high pressure resistance, simple operation and high reliability, and can effectively improve the drilling efficiency.
Description
Technical Field
The invention belongs to the technical field of underground coal mine water feeders, and particularly relates to a jaw type water feeder and a construction method thereof.
Background
In the process of underground coal mine drilling operation, a water feeder is needed to convey high-pressure flushing medium to the interior of a drill rod for deslagging or drive a hole bottom power motor. In the prior art, the water feeder cannot be quickly connected with the drill rod, the drill rod needs to be additionally installed by frequently assembling and disassembling the water feeder, and operations such as drilling construction, treatment of drilling blocking and burying accidents and the like are completed. At present, the loading and unloading water feeder needs to be manually operated by a special person, the labor intensity of workers is high, and the efficiency is low.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a jaw type water feeder and a construction method thereof, and overcomes the defects of low drilling efficiency and the like caused by low loading and unloading efficiency between the existing water feeder and a drill rod.
In order to achieve the purpose, the invention adopts the following technical scheme:
a jaw type water feeder comprises a mandrel, a bearing and a bearing sleeve which are coaxially and sequentially arranged from inside to outside, wherein a high-pressure water interface is arranged on the side wall of the mandrel; the power transmission hollow shaft is coaxially and tightly sleeved in the mandrel and can axially move, one end of the power transmission hollow shaft is closed, and the other end of the power transmission hollow shaft is opened; the high-pressure water interface is communicated with the force transmission hollow shaft in a sealing way;
a rotary handle capable of pushing the force transmission hollow shaft through rotation is arranged at the closed end of the force transmission hollow shaft, and an annular piston which is coaxial with the force transmission hollow shaft and can move along with the force transmission hollow shaft in the axial direction and a clamping jaw for assembling and disassembling a drill rod are sequentially arranged at the open end of the force transmission hollow shaft along the axial direction; the claw comprises a cylindrical part with one end connected with the annular piston, the other end of the cylindrical part is provided with arc-shaped elastic claw sheets which are sequentially arranged at intervals along the circumferential direction of the cylindrical part, and the end part of each elastic claw sheet is a claw sheet wedge-shaped surface;
a jaw sleeve is tightly and coaxially sleeved on the outer wall of the jaw, and one end of the jaw sleeve is fixedly connected to the end part of the bearing sleeve through a coaxial piston cylinder barrel; the inner wall of the other end of the claw sleeve is a wedge-shaped inner wall matched with the wedge-shaped surface of the claw piece, and a ball capable of pressing the elastic claw piece tightly and enabling each elastic claw piece to tighten up when the claw moves axially is arranged between the wedge-shaped surface of the claw piece and the wedge-shaped inner wall.
The invention also comprises the following technical characteristics:
optionally, the end of the mandrel close to the opening of the annular piston is an annular edge perpendicular to the axial direction of the mandrel;
the annular edge is tightly attached to the inner wall of the bearing sleeve, and the inner wall of the bearing sleeve is provided with an annular limiting table tightly attached to the end part of the annular edge for axially limiting the mandrel; the annular edge, the force transmission hollow shaft, the annular piston and the inner wall of the bearing sleeve enclose a sealed annular piston cavity, and the annular piston cavity is communicated with the force transmission hollow shaft in a sealing way; the annular piston cavity is used for filling high-pressure water, and the high-pressure water applies axial thrust to the annular piston to further push the clamping jaws to lock the drill rod;
the bearing and the annular piston cavity are respectively positioned on two sides of the annular edge, and a bearing gasket is arranged between the bearing and the annular edge.
Optionally, the outer part of the closed end of the force transmission hollow shaft is of a circular truncated cone structure, one end of the rotating handle, which is close to the force transmission hollow shaft, is of a trapezoidal end, and when the rotating handle is located on the central axis of the force transmission hollow shaft, the lower bottom of the trapezoidal end is flush with the upper bottom surface of the circular truncated cone structure at the closed end;
the end part of the opening of the mandrel, which is close to the rotating handle, is provided with two opposite mounting splints, and the trapezoidal end is hinged between the two mounting splints through a hinge shaft;
the rotary handle is provided with a pressable positioning ball, the inner walls of the two installation clamping plates opposite to each other are provided with ball grooves capable of being matched with the positioning ball, and the distances from the positioning ball and the ball grooves to the hinge shaft are equal; after the rotating handle rotates, the positioning ball can be limited to the ball groove, so that the angle of the lower bottom of the trapezoidal end can push the closed end of the force transmission hollow shaft to axially move to the force transmission hollow shaft.
Optionally, a blocking ring is arranged between the edge of the closed end of the force transmission hollow shaft and the mounting clamping plate, the outer wall of the blocking ring is in threaded connection with the inner wall of the end part of the mandrel, so that the axial movement of the force transmission hollow shaft is limited, and the reset rotating handle is prevented from being continuously pushed when the force transmission hollow axial rotating handle moves.
Optionally, the annular piston comprises a piston inner ring and a piston outer ring which are coaxial and connected through an annular table, and further comprises a plurality of piston push rods which are fixed at the end part of the piston outer ring and parallel to the axial direction of the annular piston, and the plurality of piston push rods are distributed along the circumferential direction of the piston outer ring; the edge of one end of the piston inner ring is opposite to the edge of the end part of the force transmission hollow shaft, and the piston outer ring is tightly attached to the inner wall of the bearing sleeve;
the piston cylinder comprises a cylinder inner cylinder and a cylinder outer cylinder which are connected through an annular plate, the inner wall of one end of the cylinder outer cylinder is fastened with the outer wall of the end part of the bearing sleeve through threads, and the outer wall of the other end of the cylinder outer cylinder is fastened with the inner wall of the end part of the jaw sleeve through threads;
a gap is reserved between the end part of the cylinder barrel inner cylinder and the end part of the piston inner ring so as to enable the annular piston to move axially, and the outer wall of the cylinder barrel inner cylinder is in close contact with the inner wall of the annular table;
a coaxial spring is arranged between the annular table and the annular plate and used for providing thrust for the reset of the force transmission hollow shaft;
the piston push rod penetrates through the annular plate and is fixedly connected with the clamping jaw so as to drive the clamping jaw to move axially through the annular piston.
Optionally, a bearing retainer ring is arranged between one end of the bearing sleeve close to the rotating handle and the outer wall of the mandrel and used for axially limiting the bearing;
the bearing retainer ring is fixedly connected with the bearing sleeve through a fixing pin;
the two bearings are tightly attached to the mandrel and are arranged along the axial direction of the mandrel, and an annular retaining ring tightly attached to the outer wall of the mandrel is arranged between the two bearings and used for axially positioning the two bearings.
Optionally, sealing rings are arranged between the force transmission hollow shaft and the mandrel, between the bearing retainer ring and the mandrel, between the bearing washer and the annular edge, between the annular edge and the bearing sleeve, between the annular piston and the piston cylinder, and between the inner wall of the cylindrical part of the jaw and the drill rod, so as to realize a sealing function;
and a GREEN ring is filled between the bearing gasket and the annular edge to realize the sealing effect.
The invention also provides a construction method of the jaw type water feeder, which comprises the following steps:
the method comprises the following steps: a rotating handle is installed and rotated to enable the positioning ball balls to be clamped into the ball groove, and the rotating handle is perpendicular to the force transmission hollow shaft; the trapezoidal end of the rotating handle pushes the force transmission hollow shaft to move axially, the force transmission hollow shaft pushes the annular piston to move axially, a spring between the annular piston and the piston cylinder barrel is contracted, the annular piston pushes the clamping jaw to move axially, and the ball between the wedge-shaped surface of the clamping jaw and the wedge-shaped inner wall tightly presses the elastic clamping jaw to enable the elastic clamping jaw to fasten a drill rod coaxially sleeved in the clamping jaw;
step two: high-pressure water is introduced into the high-pressure water interface, the high-pressure water enters the annular piston cavity, axial thrust is applied to the annular piston through the high-pressure water in the annular piston cavity, the clamping force of the clamping jaws is further increased to lock the drill rod, and therefore after the drill rod is locked in a double mode, installation of the drill rod is completed, and the drill rod starts to work;
step three: when the drill rod stops working, the high-pressure water stops being introduced, the rotating handle is rotated to enable the rotating handle to reset to the central axial position of the force transmission hollow shaft, the trapezoidal end does not push the force transmission hollow shaft any longer, the annular piston drives the clamping jaws and pushes the force transmission hollow shaft to move towards the rotating handle direction and reset under the action of the spring, the elastic claw pieces loosen the drill rod, and the water feeder and the drill rod are disassembled.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention can realize instant sealing connection between the jack catch and the drill rod, is convenient for dismounting between the jack catch and the drill rod, has small volume, high pressure resistance, simple operation and high reliability, can effectively improve the drilling efficiency and reduce the labor intensity.
And (II) the trapezoidal end of the rotating handle pushes the force transmission hollow shaft to move axially, the force transmission hollow shaft pushes the annular piston to move axially, the spring between the annular piston and the piston cylinder barrel is contracted, the annular piston pushes the clamping jaw to move axially, and the ball between the wedge-shaped surface of the clamping jaw and the wedge-shaped inner wall tightly presses the elastic clamping jaw to enable the elastic clamping jaw to fasten the drill rod coaxially sleeved in the clamping jaw. The invention can be easily applied to a cable water feeder and other similar devices, and meanwhile, the structure is convenient for realizing the automatic instant sealing connection of the water feeder and a drill rod and further realizing the automatic and unmanned drilling of the underground coal mine.
In the invention, high-pressure water is introduced into the high-pressure water interface, the high-pressure water enters the annular piston cavity, axial thrust is applied to the annular piston through the high-pressure water in the annular piston cavity, and the clamping force of the clamping jaws is further increased to lock the drill rod, so that the drill rod is installed after double locking of the drill rod is realized.
(IV) in the invention, after the drill rod stops working, the high-pressure water stops being introduced, the rotating handle is rotated to reset the rotating handle to the central axial position of the force transmission hollow shaft, the trapezoidal end does not push the force transmission hollow shaft any longer, the annular piston drives the clamping jaws and pushes the force transmission hollow shaft to move towards the direction of the rotating handle and reset under the action of the spring, and the elastic clamping jaw piece loosens the drill rod to finish the disassembly of the water feeder and the drill rod.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the structure of the claw of the invention.
Fig. 3 is a schematic view of the annular piston structure of the present invention.
The reference numerals in the figures denote: 1-mandrel, 2-bearing, 3-bearing sleeve, 4-high pressure water interface, 5-force transmission hollow shaft, 6-rotating handle, 7-annular piston, 8-drill rod, 9-jaw, 10-jaw sleeve, 11-piston cylinder, 12-ball, 13-annular piston cavity, 14-bearing washer, 15-installation clamp plate, 16-positioning ball, 17-ball groove, 18-blocking ring, 19-spring, 20-bearing retainer ring, 21-annular retainer ring and 22-Glare ring;
7-1, a piston inner ring, 7-2, an annular table, 7-3, a piston outer ring and 7-4, a piston push rod;
9-1. cylindrical portion, 9-2. elastic claw piece;
11-1, 11-2, 11-3 and an outer cylinder.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 3, the present embodiment provides a jaw type water feeder, which includes a mandrel 1, a bearing 2 and a bearing sleeve 3 coaxially arranged in sequence from inside to outside, wherein a high-pressure water port 4 is installed on a side wall of the mandrel 1; the power transmission hollow shaft 5 is coaxially and tightly sleeved in the mandrel 1 and can axially move, one end of the power transmission hollow shaft is closed, and the other end of the power transmission hollow shaft is opened; the high-pressure water interface 4 is hermetically communicated with the force transmission hollow shaft 5 and is used for introducing high-pressure water into the force transmission hollow shaft 5; a rotating handle 6 capable of pushing the force transmission hollow shaft 5 through rotation is arranged at the closed end of the force transmission hollow shaft 5, and an annular piston 7 which is coaxial with the force transmission hollow shaft 5 and can move along with the force transmission hollow shaft 5 in the axial direction and a clamping jaw 9 for assembling and disassembling a drill rod 8 are sequentially arranged at the open end of the force transmission hollow shaft 5 along the axial direction; the claw 9 comprises a cylindrical part 9-1 with one end connected with the annular piston 7, the other end of the cylindrical part 9-1 is provided with arc-shaped elastic claw sheets 9-2 which are sequentially arranged at intervals along the circumferential direction of the cylindrical part 9-1, and the end part of each elastic claw sheet 9-2 is a claw sheet wedge-shaped surface; a jaw sleeve 10 is tightly and coaxially sleeved on the outer wall of the jaw 9, and one end of the jaw sleeve 10 is fixedly connected to the end part of the bearing sleeve 3 through a coaxial piston cylinder 11; the inner wall of the other end of the claw sleeve 10 is a wedge-shaped inner wall matched with the wedge-shaped surface of the claw piece, and a ball 12 capable of pressing the elastic claw piece 9-2 and tightening each elastic claw piece 9-2 when the claw 9 moves axially is arranged between the wedge-shaped surface of the claw piece and the wedge-shaped inner wall. Through the technical scheme, instant sealing connection between the clamping jaw 9 and the drill rod 8 can be realized, the clamping jaw 9 and the drill rod 8 are convenient to disassemble, the size is small, high pressure resistance is realized, the operation is simple, the reliability is high, the drilling efficiency can be effectively improved, and the labor intensity is reduced.
In the embodiment, the end part of the opening of the mandrel 1 close to the annular piston 7 is an annular edge vertical to the axial direction of the mandrel 1; the annular edge is tightly attached to the inner wall of the bearing sleeve 3, and an annular limiting table tightly attached to the end part of the annular edge is arranged on the inner wall of the bearing sleeve 3 and used for axially limiting the mandrel 1; the annular edge, the force transmission hollow shaft 5, the annular piston 7 and the inner wall of the bearing sleeve 3 enclose a sealed annular piston cavity 13, and the annular piston cavity 13 is communicated with the force transmission hollow shaft 5 in a sealing way; the annular piston cavity 13 is used for filling high-pressure water, and the high-pressure water applies axial thrust to the annular piston 7 to further push the clamping jaws 9 to lock the drill rod 8; the bearing 2 and the annular piston chamber 13 are located on either side of the annular rim, respectively, and a bearing washer 14 is provided between the bearing 2 and the annular rim for axially locating the bearing 2.
The outer part of the closed end of the force transmission hollow shaft 5 is of a round table structure, one end of the rotating handle 6 close to the force transmission hollow shaft 5 is of a trapezoidal end of a trapezoidal structure, and when the rotating handle 6 is located on the central axis of the force transmission hollow shaft 5, the lower bottom of the trapezoidal end is flush with the upper bottom surface of the round table structure of the closed end; the end part of the opening of the mandrel 1 close to the rotating handle 6 is provided with two opposite mounting splints 15, and the trapezoidal end is hinged between the two mounting splints 15 through a hinge shaft; the rotary handle 6 is provided with a pressable positioning ball 16, the inner walls of the two installation splints 15 opposite to each other are provided with ball grooves 17 which can be matched with the positioning ball 16, and the distances from the positioning ball 16 and the ball grooves 17 to the articulated shaft are equal; after the rotating handle 6 rotates, the positioning ball 16 can be limited to the ball groove 17, so that the angle of the lower bottom of the trapezoidal end can push the closed end of the force transmission hollow shaft 5 to axially move to the force transmission hollow shaft 5. In this embodiment, more specifically, the positioning balls 16, the hinge shafts and the ball grooves 17 are distributed at an angle of 90 degrees, so that when the rotating handle 6 is located in the central axial direction of the mandrel 1, the lower bottom of the trapezoidal end is flush with the upper bottom surface of the truncated cone structure of the closed end, at this time, the rotating handle 6 has no jacking force on the closed end of the force transmission hollow shaft 5, and when the rotating handle 6 rotates 90 degrees to the position where the positioning balls 16 are clamped in the ball grooves 17, the angle at which the lower bottom of the trapezoidal end is located can jack the closed end of the force transmission hollow shaft 5 to move axially to the force transmission hollow shaft 5.
More specifically, a blocking ring 18 is arranged between the edge of the closed end of the force transmission hollow shaft 5 and the mounting clamp plate 15, the outer wall of the blocking ring 18 is in threaded connection with the inner wall of the end part of the mandrel 1, so that the axial movement of the force transmission hollow shaft 5 is limited, and the force transmission hollow shaft 5 is prevented from continuously pushing the reset rotating handle 6 when moving to the rotating handle 6.
The annular piston 7 comprises a piston inner ring 7-1 and a piston outer ring 7-3 which are connected through an annular table 7-2 and are coaxial, and the annular piston further comprises a plurality of piston push rods 7-4 which are fixed at the end part of the piston outer ring 7-3 and are parallel to the axial direction of the annular piston 7, and the plurality of piston push rods 7-4 are distributed along the circumferential direction of the piston outer ring 7-3; the edge of one end of the piston inner ring 7-1 is opposite to the edge of the end part of the force transmission hollow shaft 5, and the piston outer ring 7-3 is tightly attached to the inner wall of the bearing sleeve 3; the piston cylinder 11 comprises a cylinder inner cylinder 11-1 and a cylinder outer cylinder 11-3 which are connected through an annular plate 11-2, the inner wall of one end of the cylinder outer cylinder 11-3 is fastened with the outer wall of the end part of the bearing sleeve 3 through threads, and the outer wall of the other end of the cylinder outer cylinder 11-3 is fastened with the inner wall of the end part of the claw sleeve 10 through threads; a gap is reserved between the end part of the cylinder barrel inner cylinder 11-1 and the end part of the piston inner ring 7-1 so as to enable the annular piston 7 to move axially, and the outer wall of the cylinder barrel inner cylinder 11-1 is tightly contacted with the inner wall of the annular table 7-2; a coaxial spring 19 is arranged between the annular table 7-2 and the annular plate 11-2 and used for providing thrust for the reset of the transmission hollow shaft 5; the piston push rod 7-4 penetrates through the annular plate 11-2 and is fixedly connected with the clamping jaw 9, and the clamping jaw 9 is driven to move axially by the annular piston 7. In the embodiment, the number of the piston push rods 7-4 is four, the four piston push rods 7-4 are uniformly distributed at the end part of the piston outer ring 7-3, the piston push rods 7-4 penetrate through the annular plate 11-2 and are fixedly connected with the clamping jaws 9, the clamping jaws 9 are driven to move axially through the annular piston 7, in other embodiments, the number of the piston push rods 7-4 can be set according to actual needs, and the effect of connecting the clamping jaws 9 can also be achieved.
A bearing retainer ring 20 is arranged between one end of the bearing sleeve 3 close to the rotating handle 6 and the outer wall of the mandrel 1 and used for axially limiting the bearing 2; the bearing retainer ring 20 is fixedly connected with the bearing sleeve 3 through a fixing pin; the two bearings 2 are tightly attached to the mandrel 1 and are arranged along the axial direction of the mandrel 1, and an annular retaining ring 21 tightly attached to the outer wall of the mandrel 1 is arranged between the two bearings 2 and used for axially positioning the two bearings 2. After the drill rod 8 is installed, the drill rod 8 starts to rotate, and meanwhile, the clamping jaws 9, the clamping jaw sleeves 10, the annular pistons 7, the piston cylinder barrels 11, the bearing sleeves 3 and the bearing retainer rings 20 are driven to rotate together to work.
Sealing rings are arranged between the force transmission hollow shaft 5 and the mandrel 1, between the bearing retainer ring 20 and the mandrel 1, between the bearing gasket 14 and the annular edge, between the annular edge and the bearing sleeve 3, between the annular piston 7 and the piston cylinder 11, and between the inner wall of the cylindrical part 9-1 of the jaw 9 and the drill rod 8, so as to realize the sealing function; a GREEN 22 is filled between the bearing gasket 14 and the annular edge to realize the sealing function; specifically, an annular seal ring mounting groove for mounting a seal ring is provided on the inner wall of the cylindrical portion 9-1 of the jaw 9.
In the embodiment, the number of the balls 12 is eight, the outer wall of the jaw 9 is provided with ball moving grooves parallel to the axial direction, and each ball 12 corresponds to one ball groove to realize the movement of the ball 12, and more specifically, in the embodiment, the eight ball grooves are uniformly distributed along the circumferential direction of the jaw 9; in other embodiments, the number of the balls 12 is set according to actual requirements, and all that can be achieved is that the balls 12 press the elastic claw sheets 9-2 and tighten each elastic claw sheet 9-2 when moving between the wedge surfaces of the claw sheets and the wedge inner walls.
Example 2:
the embodiment also provides a construction method of the jaw type water feeder, which comprises the following steps:
the method comprises the following steps: a rotating handle is installed and rotated to enable the positioning ball balls to be clamped into the ball groove, and the rotating handle is perpendicular to the force transmission hollow shaft; the trapezoidal end of the rotating handle pushes the force transmission hollow shaft to move axially, the force transmission hollow shaft pushes the annular piston to move axially, a spring between the annular piston and the piston cylinder barrel is contracted, the annular piston pushes the clamping jaw to move axially, and the ball between the wedge-shaped surface of the clamping jaw and the wedge-shaped inner wall tightly presses the elastic clamping jaw to enable the elastic clamping jaw to fasten a drill rod coaxially sleeved in the clamping jaw;
step two: high-pressure water is introduced into the high-pressure water interface, the high-pressure water enters the annular piston cavity, axial thrust is applied to the annular piston through the high-pressure water in the annular piston cavity, the clamping force of the clamping jaws is further increased to lock the drill rod, and therefore after the drill rod is locked in a double mode, installation of the drill rod is completed, and the drill rod starts to work;
step three: when the drill rod stops working, the high-pressure water stops being introduced, the rotating handle is rotated to enable the rotating handle to reset to the central axial position of the force transmission hollow shaft, the trapezoidal end does not push the force transmission hollow shaft any longer, the annular piston drives the clamping jaws and pushes the force transmission hollow shaft to move towards the rotating handle direction and reset under the action of the spring, the elastic claw pieces loosen the drill rod, and the water feeder and the drill rod are disassembled.
Claims (7)
1. A jaw type water feeder comprises a mandrel (1), a bearing (2) and a bearing sleeve (3) which are coaxially and sequentially arranged from inside to outside, wherein a high-pressure water interface (4) is arranged on the side wall of the mandrel (1); the device is characterized by also comprising a force transmission hollow shaft (5) which is coaxially and tightly sleeved in the mandrel (1) and can axially move, wherein one end of the force transmission hollow shaft is closed, and the other end of the force transmission hollow shaft is opened; the high-pressure water interface (4) is communicated with the force transmission hollow shaft (5) in a sealing way;
a rotating handle (6) is arranged at the closed end of the force transmission hollow shaft (5), and an annular piston (7) which is coaxial with the force transmission hollow shaft (5) and a clamping jaw (9) for assembling and disassembling a drill rod (8) are sequentially arranged at the open end of the force transmission hollow shaft (5) along the axial direction; the claw (9) comprises a cylindrical part (9-1) with one end connected with the annular piston (7), the other end of the cylindrical part (9-1) is provided with arc-shaped elastic claw sheets (9-2) which are sequentially arranged at intervals along the circumferential direction of the cylindrical part (9-1), and the end part of each elastic claw sheet (9-2) is a claw sheet wedge-shaped surface;
a jaw sleeve (10) is tightly and coaxially sleeved on the outer wall of the jaw (9), and one end of the jaw sleeve (10) is fixedly connected to the end part of the bearing sleeve (3) through a coaxial piston cylinder barrel (11); the inner wall of the other end of the claw sleeve (10) is a wedge-shaped inner wall matched with the wedge-shaped surface of the claw sheet, and a ball (12) capable of pressing the elastic claw sheets (9-2) and tightening the elastic claw sheets (9-2) when the claw (9) moves axially is arranged between the wedge-shaped surface of the claw sheet and the wedge-shaped inner wall;
the end part of the opening of the mandrel (1), which is close to the annular piston (7), is an annular edge which is vertical to the axial direction of the mandrel (1);
the annular edge is tightly attached to the inner wall of the bearing sleeve (3), and an annular limiting table tightly attached to the end part of the annular edge is arranged on the inner wall of the bearing sleeve (3) and used for axially limiting the mandrel (1); the annular edge, the force transmission hollow shaft (5), the annular piston (7) and the inner wall of the bearing sleeve (3) enclose a sealed annular piston cavity (13), and the annular piston cavity (13) is communicated with the force transmission hollow shaft (5) in a sealing way; the annular piston cavity (13) is used for filling high-pressure water, and the high-pressure water applies axial thrust to the annular piston (7) to further push the clamping jaws (9) to lock the drill rod (8);
the bearing (2) and the annular piston cavity (13) are respectively positioned on two sides of the annular edge, and a bearing gasket (14) is arranged between the bearing (2) and the annular edge.
2. The jaw type water feeder according to claim 1, wherein the outer part of the closed end of the force transmission hollow shaft (5) is in a round platform structure, one end of the rotating handle (6) close to the force transmission hollow shaft (5) is in a trapezoidal end of a trapezoidal structure, and when the rotating handle (6) is located on the central axis of the force transmission hollow shaft (5), the lower bottom of the trapezoidal end is flush with the upper bottom surface of the round platform structure of the closed end;
the end part, close to the opening of the rotating handle (6), of the mandrel (1) is provided with two opposite mounting splints (15), and the trapezoidal end is hinged between the two mounting splints (15) through a hinge shaft;
the rotary handle (6) is provided with a pressable positioning ball (16), the inner walls of the two installation clamping plates (15) which are opposite to each other are provided with ball grooves (17) which can be matched with the positioning ball (16), and the distances from the positioning ball (16) and the ball grooves (17) to the hinge shaft are equal; after the rotating handle (6) rotates, the positioning ball (16) can be limited to the ball groove (17), so that the angle of the lower bottom of the trapezoid end can push the closed end of the force transmission hollow shaft (5) to axially move to the force transmission hollow shaft (5).
3. The jaw type water feeder according to claim 2, wherein a blocking ring (18) is arranged between the edge of the closed end of the force transmission hollow shaft (5) and the mounting clamp plate (15), the outer wall of the blocking ring (18) is in threaded connection with the inner wall of the end part of the mandrel (1) to limit the axial movement of the force transmission hollow shaft (5) and prevent the force transmission hollow shaft (5) from continuously pushing the reset rotating handle (6) when moving to the rotating handle (6).
4. The claw type water feeder according to claim 1, wherein the annular piston (7) comprises a piston inner ring (7-1) and a piston outer ring (7-3) which are coaxial and connected through an annular table (7-2), and further comprises a plurality of piston push rods (7-4) which are fixed at the end part of the piston outer ring (7-3) and are parallel to the axial direction of the annular piston (7), and the plurality of piston push rods (7-4) are distributed along the circumferential direction of the piston outer ring (7-3); the edge of one end of the piston inner ring (7-1) is opposite to the edge of the end part of the force transmission hollow shaft (5), and the piston outer ring (7-3) is tightly attached to the inner wall of the bearing sleeve (3);
the piston cylinder barrel (11) comprises a cylinder barrel inner barrel (11-1) and a cylinder barrel outer barrel (11-3) which are connected through an annular plate (11-2), the inner wall of one end of the cylinder barrel outer barrel (11-3) is fastened with the outer wall of the end part of the bearing sleeve (3) through threads, and the outer wall of the other end of the cylinder barrel outer barrel (11-3) is fastened with the inner wall of the end part of the claw sleeve (10) through threads;
a gap is reserved between the end part of the cylinder barrel inner cylinder (11-1) and the end part of the piston inner ring (7-1) so as to enable the annular piston (7) to move axially, and the outer wall of the cylinder barrel inner cylinder (11-1) is in close contact with the inner wall of the annular table (7-2);
a coaxial spring (19) is arranged between the annular table (7-2) and the annular plate (11-2) and used for providing thrust for the resetting of the force transmission hollow shaft (5);
the piston push rod (7-4) penetrates through the annular plate (11-2) and is fixedly connected with the clamping jaw (9) and used for driving the clamping jaw (9) to axially move through the annular piston (7).
5. The jaw type water feeder according to claim 1, wherein a bearing retainer ring (20) is arranged between one end of the bearing sleeve (3) close to the rotating handle (6) and the outer wall of the mandrel (1) for axially limiting the bearing (2);
the bearing retainer ring (20) is fixedly connected with the bearing sleeve (3) through a fixing pin;
the two bearings (2) are tightly attached to the mandrel (1) and are distributed along the axial direction of the mandrel (1), and an annular retaining ring (21) tightly attached to the outer wall of the mandrel (1) is arranged between the two bearings (2) and used for axially positioning the two bearings (2).
6. The claw type water feeder according to any one of claims 1 to 5, characterized in that sealing rings are arranged between the force transmission hollow shaft (5) and the mandrel (1), between the bearing retainer ring (20) and the mandrel (1), between the bearing washer (14) and the annular edge, between the annular edge and the bearing sleeve (3), between the annular piston (7) and the piston cylinder (11), and between the inner wall of the cylindrical part (9-1) of the jaw (9) and the drill rod (8) for sealing;
the bearing washer (14) and the annular edge are filled with a Gray ring (22) for sealing.
7. A method of construction using the jaw-type water feeder of claim 6, comprising the steps of:
the method comprises the following steps: a rotating handle is installed and rotated to enable the positioning ball balls to be clamped into the ball groove, and the rotating handle is perpendicular to the force transmission hollow shaft; the trapezoidal end of the rotating handle pushes the force transmission hollow shaft to move axially, the force transmission hollow shaft pushes the annular piston to move axially, a spring between the annular piston and the piston cylinder barrel is contracted, the annular piston pushes the clamping jaw to move axially, and the ball between the wedge-shaped surface of the clamping jaw and the wedge-shaped inner wall tightly presses the elastic clamping jaw to enable the elastic clamping jaw to fasten a drill rod coaxially sleeved in the clamping jaw;
step two: high-pressure water is introduced into the high-pressure water interface, the high-pressure water enters the annular piston cavity, axial thrust is applied to the annular piston through the high-pressure water in the annular piston cavity, the clamping force of the clamping jaws is further increased to lock the drill rod, and therefore after the drill rod is locked in a double mode, installation of the drill rod is completed, and the drill rod starts to work;
step three: when the drill rod stops working, the high-pressure water stops being introduced, the rotating handle is rotated to enable the rotating handle to reset to the central axial position of the force transmission hollow shaft, the trapezoidal end does not push the force transmission hollow shaft any longer, the annular piston drives the clamping jaws and pushes the force transmission hollow shaft to move towards the rotating handle direction and reset under the action of the spring, the elastic claw pieces loosen the drill rod, and the water feeder and the drill rod are disassembled.
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| CN114809915B (en) * | 2022-04-15 | 2022-11-22 | 河南理工大学 | Hole drilling, sealing and pressure measuring integrated device and pressure measuring method for coal seam deep and long hole |
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