CN115539021B - Omnibearing automatic propelling device of drilling imager - Google Patents

Omnibearing automatic propelling device of drilling imager Download PDF

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Publication number
CN115539021B
CN115539021B CN202211344422.1A CN202211344422A CN115539021B CN 115539021 B CN115539021 B CN 115539021B CN 202211344422 A CN202211344422 A CN 202211344422A CN 115539021 B CN115539021 B CN 115539021B
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China
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hole
rack
square
shaped
gear
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CN115539021A (en
Inventor
刘艳章
葛伟杰
单梁
肖一鸣
于佳兴
胡谱达
张军
黄诗冰
秦绍兵
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Wuhan University of Science and Engineering WUSE
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Wuhan University of Science and Engineering WUSE
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/002—Survey of boreholes or wells by visual inspection

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The invention particularly relates to an omnibearing automatic propelling device of a drilling imager. The technical proposal is as follows: the gear transmission mechanism (3) is fixedly connected with the upper plane of the base (2), a rotary encoder (6) is arranged at one end of a gear shaft of the gear transmission mechanism (3), the other end of the gear shaft of the gear transmission mechanism (3) is connected with the clamping device (4), and the rack type push rod (5) is meshed with a large gear of the gear transmission mechanism (3) through the clamping device (4). The rotary encoder (6) generates a depth pulse signal through the rotation of the large gear (17), and the rotary encoder (6) is connected with a control box of the drilling imager through a signal output cable; the lengthening of the rack push rod (5) is to insert the square column type connecting end of one lengthened rack (28) into the square hole type connecting end of the other, and the clamping block (31) of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of the spring (32) to form a whole. The invention has the advantages of convenient operation, stable image acquisition and accurate advanced depth identification, and is suitable for omnibearing drilling of roadways and tunnels.

Description

Omnibearing automatic propelling device of drilling imager
Technical Field
The invention belongs to the technical field of a drilling imager propelling device. In particular to an omnibearing automatic propelling device of a drilling imager.
Background
In the technical field of geotechnical engineering test, the research of the distribution range and the change rule of the roadway and the tunnel surrounding rock loose rings has important significance in improving the design of roadway and tunnel supporting structure and engineering construction. Because the cracks of the surrounding rocks of the roadway and the tunnel develop, the stress environment is complex, the loose coil test tends to have larger error, and the loose coil test is widely performed by adopting a drilling imager at present, so that the broken areas of the surrounding rocks of the roadway and the tunnel can be intuitively mastered. In the process of carrying out the loose coil test, in order to obtain the distribution range of the loose coil of the surrounding rock, drilling holes in multiple directions are required to be tested by a drilling imager; meanwhile, in field use of the drilling imager, a worker holds the push rod to feed the drilling imager probe into the drilling, and the push rod is pushed to be slowly and uniformly at a high measurement depth, so that the operator has high test difficulty and low efficiency, and the test and imaging effects are easily affected. Therefore, the push rod propulsion device suitable for omnibearing drilling of roadways and tunnels is widely paid attention to by those skilled in the art.
The 'automatic constant-speed push rod pushing device' (CN 113404455A) patent technology can fix a push rod in the engineering measurement processes of borehole peeping, track imaging and the like, automatically and uniformly send the push rod into a borehole, reduces the manual workload, can improve the test quality, but has the following defects: 1. the tripod base device and the upper base device limit the pushing direction of the pushing rod of the drilling imager, and the pushing rod can only be pushed upwards or downwards perpendicular to the ground, so that the drilling imager is not applicable to omnibearing drilling of a roadway and a tunnel. 2. In the pushing process of the push rod, the roller clamping pushing device provides pressure and sliding friction force for the push rod, when the whole weight of the push rod is increased due to the fact that the length of the push rod is lengthened, stable pushing of the push rod cannot be guaranteed, falling of the push rod is easy to occur, the image acquisition effect is poor, and the pushing depth identification is inaccurate. 3. The driving wheel and the driven wheel in the roller clamping and pushing device are internally fixed with rubber cushion layers, the rubber cushion layers deform after the push rod is clamped, the size of the roller is changed, and then errors are generated in data measured by the rotary encoder, so that the situation of inaccurate pushing depth identification occurs.
The patent technology of an electric drilling imager probe rod pushing device (CN 205135602U) has the advantages that the structure is simple, the slow and uniform operation and the high efficiency can be realized in the process of pushing the probe rod, but the following defects exist: 1. the knob and the adjusting frame are used for adjusting the height direction of the fixed shaft so as to change the pushing direction of the push rod, and the push rod can only be pushed upwards parallel to the ground or in an inclined way, so that the push rod can not be suitable for omnibearing drilling of a roadway and a tunnel. 2, the push rod is easy to rotate and fall back, and the image acquisition effect and the pushing depth identification of the drilling imager are affected.
The patent technology of a visual control conveying device (CN 114893139A) suitable for a multi-aperture multi-angle drilling imager is applicable to drilling holes with various apertures and various angles, gravity or a supporting rod is not needed to be used as power for placing a probe, the speed of the probe propelling and arranging process is controllable, and video information in front of the probe can be transmitted in real time to judge the advancing position of the probe, but the following defects exist: the remote control video monitoring power mechanism is used for providing forward power for the operation of the drilling imager under the condition of omnibearing multi-angle drilling, the remote control video monitoring power mechanism contacts with the wall of the drilling hole by means of dead weight, and when the remote control video monitoring power mechanism operates in elevation angle and vertical drilling, the remote control video monitoring power mechanism cannot ensure that the remote control video monitoring power mechanism is clung to the wall of the drilling hole, so that continuous uniform forward power is provided for the drilling imager; and the remote control video monitoring power mechanism is easy to fall back in the vertical upward drilling in elevation angle, so that the drilling imager is damaged, the image acquisition effect is poor and the propulsion depth identification is inaccurate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and aims to provide the omnibearing automatic propelling device of the drilling imager, which is convenient to operate, stable in image acquisition, accurate in propelling depth identification and suitable for omnibearing drilling of a roadway and a tunnel.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The device consists of a tripod, a base, a gear transmission mechanism, a clamping device, a rack type push rod and a rotary encoder. The tripod is fixedly connected with the lower plane of the base, the gear transmission mechanism is fixedly connected with the upper plane of the base, a rotary encoder is arranged at one end of a gear shaft of the gear transmission mechanism, the other end of the gear shaft of the gear transmission mechanism is connected with the clamping device, and the rack type push rod is meshed with a large gear of the gear transmission mechanism through the clamping device.
The base includes lower base, lead screw, upper base and circular level. The lower base and the upper base are round blocks with the same diameter and the same height, a round boss is arranged at the middle position of the upper plane of the lower base, and a hollow cylinder is arranged at the middle position of the lower plane of the upper base; the height of the circular boss is 0.6-0.7 times of the height of the lower base, and the height of the circular boss is the same as the nominal size of the height of the hollow cylinder; the diameter of the circular boss is 0.3-0.4 times of the diameter of the lower base, and the diameter of the circular boss is 0.6-0.8 times of the diameter of the hollow cylinder.
The center of the hollow cylinder of the upper base is symmetrically provided with two base screw holes, the two base screw holes are communicated with the hollow cylinder, and the center lines of the two base screw holes are intersected with the center line of the hollow cylinder. One end of each screw rod is fixed with an arc-shaped plate, the two arc-shaped plates are contacted with the side surface of the round boss, the other ends of the two screw rods penetrate through respective base screw holes to be in threaded connection with nuts, and the lower base, the screw rods and the upper base are mutually fixed by screwing the nuts; a round level is arranged near the edge of the upper base.
The gear transmission mechanism comprises a bearing seat, a large gear, a driven gear, a driving gear and a motor; the bearing seat is composed of two symmetrical trapezoid seat plates, the bottoms of the two trapezoid seat plates are fixedly connected with the upper plane of the base, gear shaft holes are symmetrically formed in the upper parts of the two trapezoid seat plates, and the first bearings are symmetrically arranged in the gear shaft holes.
The motor is fixed on the lower part of the left trapezoid seat plate of the bearing seat, an output shaft of the motor is connected with a driving gear shaft through a second bearing arranged on the lower part of the left trapezoid seat plate, the driving gear is meshed with a driven gear, the driven gear is fixedly connected with a large gear in a coaxial line, and two ends of the gear shafts of the large gear and the driven gear are movably arranged in first bearings corresponding to the large gear and the driven gear respectively.
The outer end of the gear shaft on the same side of the motor is provided with a rotary encoder, the rotary encoder generates a depth pulse signal through the rotary encoding of the large gear, and the rotary encoder is connected with a control box of the drilling imager through a signal output cable so as to transmit the depth pulse signal.
A hollow shaft is arranged at an orifice at the outer side of a gear shaft hole of a right trapezoid seat plate of the bearing seat, the right trapezoid seat plate and the hollow shaft are integrated, and the gear shaft hole of the right trapezoid seat plate and the hollow shaft are on the same axis; two limiting blocks are horizontally arranged on the outer side of the right trapezoid seat plate, and the perpendicular bisector of a connecting line of the two limiting blocks is intersected with the axis of the hollow shaft; the distance between the upper planes of the two limiting blocks and the horizontal plane where the axis of the hollow shaft is positioned is 0.5-0.55 times of the width of the swing arm.
The clamping device comprises a swing arm, two rollers, a roller frame and bolts; the inner end of the swing arm is provided with a circular shaft hole, the circular shaft hole is connected with a hollow shaft of the bearing seat, and the aperture of the circular shaft hole is the same as the nominal size of the outer diameter of the hollow shaft; the hollow shaft is provided with internal threads, the swing arm bolt is in threaded connection with the internal threads of the hollow shaft, and the bearing seat and the swing arm are mutually fixed by screwing the swing arm bolt.
The swing arm is a whole body formed by connecting one side of a 'concave' frame and a bar-shaped rod piece, bar-shaped holes are symmetrically arranged on two sides of the 'concave' frame, and roller frames are symmetrically arranged on the two bar-shaped holes; the middle position of the concave frame is provided with a clamping screw hole, the central line of the clamping screw hole is parallel to the axis of the bar-shaped rod piece, the clamping bolt is screwed into the clamping screw hole, and the clamping bolt is tightly pressed against the roller frame by rotating the nut.
The roller frame is a cross-shaped whole body consisting of a vertical rod piece and a horizontal rod piece; two ends of the horizontal rod piece are symmetrically fixed with sliding blocks, and the two sliding blocks are movably arranged in the corresponding strip-shaped holes; the vertical rod piece is in a [ -shaped structure, rollers are symmetrically arranged at two ends of the vertical rod piece, and the roller rack drives the rollers to tightly press the rack type push rod, so that racks of the rack type push rod are meshed with the large gear.
The horizontal rod piece and the roller frame are mutually vertical and equally divided; the head of the clamping bolt is contacted with the roller frame.
The roller is a cylinder and an integral body formed by annular bosses at two ends of the cylinder, and the distance between the inner sides of the two annular bosses is the same as the nominal size of the width of the rack backboard of the rack push rod.
The rack type push rod is a single lengthened rack or an integral lengthened rack formed by connecting more than 2 lengthened racks.
The lengthened rack is a straight rack, the lower end of the straight rack is a square hole type connecting end, and the upper end of the straight rack is a square column type connecting end.
The square hole type connecting end has the structure that: a square connecting hole is formed inwards at the lower end face of the straight rack, and the central line of the square connecting hole is parallel to the intersection line of the side face and the back face of the straight rack; the middle position of the square connecting hole is symmetrically provided with special-shaped through holes, and the central lines of the two special-shaped through holes are perpendicular and intersected with the central line of the square connecting hole.
The special-shaped through hole is formed by connecting a round hole and a horizontal square hole with a rectangular section, the round hole and the horizontal square hole are sequentially formed from outside to inside, and the connecting line of the central line of the horizontal square hole and the central line of the round hole forms the central line of the special-shaped through hole; the diameter of the round hole is equal to the diameter of the circumscribed circle of the rectangular hole, and the depth of the round hole is 0.6-0.7 times of the depth of the special-shaped through hole; the two special-shaped through holes are sequentially and symmetrically provided with a button and a gland from inside to outside.
The button is a coaxial line whole formed by a large cylinder and small cylinders at two ends of the large cylinder, the diameter of the large cylinder in the middle is the same as the nominal size of the diameter of a circular hole of the special-shaped through hole, and the diameters of the small cylinders at two sides of the large cylinder are equal to the short sides of the rectangular hole in section; the height of the small cylinder at the inner side of the large cylinder is the same as the depth of the rectangular hole in the section, the axial length of the large cylinder is 0.3-0.4 times of the depth of the round hole in the special-shaped through hole, and the height of the small cylinder at the outer side of the large cylinder is 1.0-1.5 times of the depth of the round hole in the special-shaped through hole.
The gland is an integral body with the same center line and composed of a circular tube and a hollow disc at the end face of the circular tube; the outer diameter of the circular tube is the same as the nominal size of the aperture of the circular hole in the special-shaped through hole, the inner diameter of the circular tube is the same as the nominal size of the diameter of the small cylinder of the button, and the length of the circular tube is equal to the sum of the depth of the circular hole in the special-shaped through hole minus the axial length of the large cylinder of the button and the small cylinder at the inner side of the large cylinder.
The gland is fixed in the round hole of the special-shaped through hole through the hollow disc, and a small cylinder at the outer side of the button penetrates through the center hole of the gland to be movably connected with the round pipe of the gland.
The square column type connecting end has the structure that: the upper end face of the straight rack is provided with a raised square column body, and the central line of the square column body and the central line of the square connecting hole are in the same straight line; a vertical square hole is formed inwards at the middle position of the end part of the square column, and the depth of the vertical square hole is 0.5-0.6 times of the height of the square column; horizontal through holes with rectangular cross sections are symmetrically arranged at the middle positions of the two sides of the vertical square hole, the central lines of the two horizontal through holes are the same line, and the central lines of the two horizontal through holes are vertical and intersect with the central line of the vertical square hole; the distance h 0 from the center line of the horizontal through hole to the upper end surface of the lengthened rack is equal to the distance h 0 from the center line of the special-shaped through hole to the lower end surface of the lengthened rack.
Clamping blocks are symmetrically arranged in the two horizontal through holes, and springs are arranged between the two clamping blocks.
The clamping block is a coaxial whole consisting of a rectangular chuck, a rectangular column body and a trapezoidal square block; the cross section of the rectangular cylinder is the same as the nominal size of the cross section of the horizontal through hole, the cross section of the rectangular chuck is 1.1-1.15 times of the corresponding size of the cross section of the rectangular cylinder, and the cross section of the rectangular cylinder is the same as the bottom area of the trapezoid square; the length of the rectangular column body along the axial direction of the clamping block is the same as the depth of the horizontal through hole, and the length of the trapezoid square block along the axial direction of the clamping block is the same as the depth of the horizontal square hole in the special-shaped through hole of the square hole type connecting end.
Square connecting hole of square hole formula link:
Width W 1 =0.3 to 0.4W;
Depth H 1 =0.03 to 0.04H;
Length D 1 = 0.48-0.52D;
The distance between the center line of the square connecting hole and the back surface of the straight rack is D 0+d1/2,d0 =0.2d.
Square column body of square column formula link:
The width w 2 is the same as the nominal dimension of the width w 1 of the square connecting hole;
the height h 2 is the same as the nominal size of the depth h 1 of the square connecting hole;
The depth d 2 is the same as the nominal dimension of the length d 1 of the square connecting hole;
The distance between the center line of the square column body and the back surface of the straight rack is d 0+d2/2.
Wherein: w represents the width of the back of the extendable rack, and the unit is mm;
h represents the height of the lengthened rack, and the unit is mm;
d represents the distance from the back of the extendable rack to the tooth root of the rack in mm.
The integral lengthened rack is as follows: the square column type connecting end of one lengthened rack is inserted into the square hole type connecting end of the other lengthened rack, and a clamping block of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of a spring to form a whole.
The curvature radius of the arc-shaped plate is the same as that of the circular boss of the lower base, and the central angle of the arc-shaped plate is 40-45 degrees.
The two limiting blocks are rectangular blocks, and the heights of the two limiting blocks are the same as the thickness of the swing arm.
The width of the horizontal through hole is 0.3-0.4 times of the depth of the vertical square hole, and the rectangular section of the horizontal through hole is the same as the size corresponding to the rectangular section of the horizontal square hole of the special-shaped through hole at the other end.
The using method of the invention comprises the following steps:
Step 1, setting up the tripod on ground, installing the upper base and the lower base of base, enabling the hollow cylinder of upper base to be embedded with the round boss of lower base, and ending the adjustment of the tripod when the bubble of the round level of tripod is centered.
And 2, installing a drilling imager at the front end of a single lengthened rack of the rack type push rod, placing the single lengthened rack between the large gear and the roller, and adjusting the distance between the large gear and the roller through a clamping bolt so that the single lengthened rack is effectively meshed with the large gear.
Step3, adjusting the relative rotation angle of the lower base and the upper base and the rotation angle of the swing arm, so that the direction of the drilling imager pushed by the rack type push rod and the drilling center line are on the same straight line, the lower base, the screw rod and the upper base are mutually fixed by screwing the nuts, the relative rotation angle of the lower base and the upper base is further fixed, and the bearing seat and the swing arm are mutually fixed by screwing the swing arm bolts so as to fix the rotation angle of the swing arm.
And 4, connecting the rotary encoder to a control box of the drilling imager through a signal output cable.
And 5, starting a motor, wherein the motor drives a driving gear to drive a driven gear and a large gear to rotate, so as to push a rack type push rod to advance, and automatically and slowly pushing the drilling imager at a uniform speed.
And 6, when the residual length of the rack type push rod is too short, closing the motor, and after the motor stops running, inserting the square column type connecting end of the other lengthened rack into the square hole type connecting end of the single lengthened rack.
And 7, repeating the step 5 and the step 6 until the drilling is finished.
By adopting the technical scheme, compared with the prior art, the invention has the following positive effects:
① The operation is convenient. When the drilling imager is propelled, the drilling imager is arranged at the front end of the single lengthened rack of the rack type push rod, the rack type push rod and the large gear can be effectively meshed through the clamping device, the driving gear is driven by the motor, the driven gear and the large gear are further driven to rotate, the rack type push rod is further pushed to advance, the automatic and slow uniform-speed propulsion of the drilling imager is completed, the manual workload is reduced, and the drilling imager is convenient to operate.
The rack type push rod adopts the lengthened rack, when the drilling imager is propelled, the drilling imager is arranged at the front end of a single lengthened rack of the rack type push rod, when the lengthened rack type push rod is needed, the square column type connecting end of the other lengthened rack can be inserted into the square hole type connecting end of the single lengthened rack, and a clamping block of the square column type connecting end is inserted into a special-shaped through hole of the square hole type connecting end through the acting force of a spring to form a whole, and the whole can be lengthened to 10 pieces according to the needs; the button of the lengthened rack can be pressed when the rack is required to be disassembled, and the button pushes the clamping block out of the special-shaped through hole to separate the square column type connecting end from the square hole type connecting end. The rack type push rod can be quickly and conveniently connected and detached by the method, and meanwhile, the straight tooth distances among the lengthened racks can be ensured to be equal and the connection is tight when the rack type push rod is connected, so that the operation is convenient.
② The image acquisition is stable and the identification accuracy of the advancing depth is high. The drilling imager is connected with the control box of the drilling imager to transmit image signals, and is arranged at the front end of a single lengthened rack of the rack type push rod when the drilling imager is propelled, the rack type push rod is clamped by the clamping device and the large gear, the two ends of the roller frame in the clamping device are connected with rollers, the rollers are tightly pressed on the back surface of the lengthened rack, and the situation that the rack type push rod swings, falls back or breaks away from the device in the propulsion process of the drilling imager can be effectively prevented by applying two counter forces to the back surface of the lengthened rack, so that the drilling imager is guaranteed to slowly propel at a constant speed, the imaging and splicing effects are improved, and the image acquisition is stable.
In the rack type push rod connection process, the lengthened rack is adopted, when the lengthened rack is needed, the square column type connecting end of one lengthened rack can be inserted into the square hole type connecting end of the other lengthened rack, the clamping block of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of the spring to form a whole, the rack type push rod can be quickly and stably connected, shaking of the drilling imager in the rack type push rod connection process is effectively reduced, and the imaging and splicing effects of the test are improved.
The rotary encoder adopted by the invention can record the revolution N of the large gear and the angular displacement delta theta of the unfinished integer circle relative to the starting point, and encode and generate a depth pulse signal. Because the length L of the drilling imager and the radius r of the adopted large gear are known, the large gear drives the rack type push rod to push the drilling imager to the depth L=N.2pi r+delta theta.r+l, the push depth of the drilling imager can be directly determined, and the rotary encoder can be connected with a control box of the drilling imager to transmit a depth pulse signal, so that the identification precision of the push depth is high.
③ The drilling machine is suitable for omnibearing drilling of roadways and tunnels. According to the invention, the relative rotation angle of the lower base and the upper base of the base and the rotation angle of the swing arm of the clamping device are regulated, so that the direction of the drilling imager pushed by the rack type push rod is in the same straight line with the drilling center line; the lower base, the screw rod and the upper base are mutually fixed by screwing the nuts, so that the relative rotation angle of the lower base and the upper base is fixed; the bearing seat and the swing arm are mutually fixed by screwing the swing arm bolt, so that the rotation angle of the swing arm is fixed. The method is used for adjusting the pushing direction of the drilling imager through the rack type push rod so as to test drilling holes with different angles, so that the method is suitable for omnibearing drilling holes of roadways and tunnels.
Therefore, the invention has the characteristics of convenient operation, stable image acquisition and accurate advanced depth identification, and is suitable for omnibearing drilling of roadways and tunnels.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention;
FIG. 2 is a left side schematic view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the base 2 of FIG. 1;
fig. 4 is a schematic cross-sectional view of the gear transmission 3 of fig. 1;
Fig. 5 is a schematic view of a structure of the clamping device 4 in fig. 1;
Fig. 6 is a top view of the clamping device 4 of fig. 1;
FIG. 7 is a schematic view of a structure of the rack bar 5 of FIG. 1;
FIG. 8 is a schematic view in section A-A of FIG. 7;
FIG. 9 is an enlarged partial schematic view of I in FIG. 1;
fig. 10 is a schematic view of section B-B of fig. 9.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description, without limiting the scope of the invention.
Example 1
An omnibearing automatic propelling device of a drilling imager. The device is shown in fig. 1 and 2, and consists of a tripod 1, a base 2, a gear transmission mechanism 3, a clamping device 4, a rack type push rod 5 and a rotary encoder 6; the tripod 1 is fixedly connected with the lower plane of the base 2, the gear transmission mechanism 3 is fixedly connected with the upper plane of the base 2, a rotary encoder 6 is arranged at one end of a gear shaft of the gear transmission mechanism 3, the other end of the gear shaft of the gear transmission mechanism 3 is connected with the clamping device 4, and the rack type push rod 5 is meshed with a large gear of the gear transmission mechanism 3 through the clamping device 4.
As shown in fig. 3, the base 2 comprises a lower base 7, a screw rod 8, an upper base 11 and a circular level 12; the lower base 7 and the upper base 11 are round blocks with equal diameters and equal heights, a round boss is arranged at the middle position of the upper plane of the lower base 7, and a hollow cylinder is arranged at the middle position of the lower plane of the upper base 11; the height of the circular boss is 0.65 times of the height of the lower base 7, and the height of the circular boss is the same as the nominal size of the height of the hollow cylinder; the diameter of the circular boss is 0.35 times of the diameter of the lower base 7, and the diameter of the circular boss is 0.7 times of the diameter of the hollow cylinder.
As shown in fig. 3, the center of the hollow cylinder of the upper base 11 is symmetrically provided with two base screw holes, the two base screw holes are communicated with the hollow cylinder, and the central lines of the two base screw holes are intersected with the central line of the hollow cylinder; one end of each screw rod 8 is fixedly provided with an arc-shaped plate 10, the two arc-shaped plates 10 are in contact with the side surfaces of the round bosses, the other ends of the two screw rods 8 penetrate through respective base screw holes to be in threaded connection with nuts 9, and the lower base 7, the screw rods 8 and the upper base 11 are mutually fixed by screwing the nuts 9; a circular level 12 is provided near the edge of the upper base 11.
As shown in fig. 4, the gear transmission mechanism 3 includes a bearing housing 13, a large gear 17, a driven gear 20, a driving gear 21, and a motor 22; the bearing seat 13 is composed of two symmetrical trapezoid seat plates, the bottoms of the two trapezoid seat plates are fixedly connected with the upper plane of the base 2, gear shaft holes are symmetrically arranged at the upper parts of the two trapezoid seat plates, and the first bearings 18 are symmetrically arranged in the gear shaft holes.
As shown in fig. 4, a motor 22 is fixed at the lower part of the left trapezoid seat plate of the bearing seat 13, an output shaft of the motor 22 is in shaft connection with a driving gear 21 through a second bearing 23 arranged at the lower part of the left trapezoid seat plate, the driving gear 21 is meshed with a driven gear 20, the driven gear 20 is fixedly connected with a large gear 17 in a coaxial line, and two ends of a gear shaft of the large gear 17 and two ends of a gear shaft of the driven gear 20 are movably arranged in corresponding first bearings 18 respectively.
As shown in fig. 4, the outer end of the gear shaft 19 on the same side as the motor 22 is provided with a rotary encoder 6, the rotary encoder 6 generates a depth pulse signal through rotary encoding of the large gear 17, and the rotary encoder 6 is connected with a control box of the borehole imager through a signal output cable so as to transmit the depth pulse signal.
As shown in fig. 4, a hollow shaft is arranged at an orifice outside a gear shaft hole of a right trapezoid seat plate of the bearing seat 13, the right trapezoid seat plate and the hollow shaft are integrated, and the gear shaft hole of the right trapezoid seat plate and the hollow shaft are on the same axis; two limiting blocks 14 are horizontally arranged on the outer side of the right trapezoid seat plate, and the perpendicular bisector of the connecting line of the two limiting blocks 14 is intersected with the axis of the hollow shaft; the distance between the upper planes of the two limiting blocks and the horizontal plane where the axis of the hollow shaft is positioned is 0.53 time of the width of the swing arm 16.
As shown in fig. 5 and 6, the clamping device 4 includes a swing arm 16, two rollers 24, a roller frame 25, and a bolt 26; the inner end of the swing arm 16 is provided with a circular shaft hole, as shown in fig. 4, the circular shaft hole is connected with a hollow shaft of the bearing seat 13, and the aperture of the circular shaft hole is the same as the nominal size of the outer diameter of the hollow shaft; the hollow shaft is provided with internal threads, the swing arm bolt 15 is in threaded connection with the internal threads of the hollow shaft, and the bearing seat 13 and the swing arm 16 are mutually fixed by screwing the swing arm bolt 15.
As shown in fig. 5 and 6, the swing arm 16 is an integral body formed by connecting one side of a 'concave' frame and a bar-shaped rod, two sides of the 'concave' frame are symmetrically provided with bar-shaped holes 27, and two bar-shaped holes 27 are symmetrically provided with roller frames 25; the middle position of the concave frame is provided with a clamping screw hole, the center line of the clamping screw hole is parallel to the axis of the bar-shaped rod piece, the clamping bolt 26 is screwed into the clamping screw hole, and the clamping bolt 26 is tightly pressed against the roller frame 25 by rotating the nut.
The roller frame 25 is a cross-shaped whole body consisting of a vertical rod piece and a horizontal rod piece; two ends of the horizontal rod piece are symmetrically fixed with sliding blocks, and the two sliding blocks are movably arranged in the corresponding strip-shaped holes 27; the vertical rod piece is in a [ -shaped structure, rollers 24 are symmetrically arranged at two ends of the vertical rod piece, and the roller frame 25 drives the rollers 24 to tightly press the rack type push rod 5, so that racks of the rack type push rod 5 are meshed with the large gear.
The horizontal rod piece and the roller frame 25 are mutually vertical and are equally divided; the head of the clamping bolt 26 is in contact with the roller frame 25.
As shown in fig. 6, the roller 24 is a whole body formed by a cylinder and annular bosses at two ends of the cylinder, and the distance between the inner sides of the two annular bosses is the same as the nominal dimension of the width of the rack back plate of the rack type push rod 5.
The rack type push rod 5 is an integral lengthened rack formed by connecting 2 lengthened racks 28.
As shown in fig. 7 and 8, the extendable rack 28 is a straight rack, the lower end of the straight rack is a square hole type connection end, and the upper end of the straight rack is a square column type connection end.
As shown in fig. 7 and 8, the square hole type connection end has the following structure: a square connecting hole is formed inwards at the lower end face of the straight rack, and the central line of the square connecting hole is parallel to the intersection line of the side face and the back face of the straight rack; the middle position of the square connecting hole is symmetrically provided with special-shaped through holes, and the central lines of the two special-shaped through holes are perpendicular and intersected with the central line of the square connecting hole.
As shown in fig. 8, the special-shaped through hole is a through hole formed by connecting a round hole and a horizontal square hole with a rectangular section, the round hole and the horizontal square hole are sequentially formed in the special-shaped through hole from outside to inside, and the connecting line of the central line of the horizontal square hole and the central line of the round hole forms the central line of the special-shaped through hole; the diameter of the round hole is equal to the diameter of the circumscribed circle of the rectangular hole, and the depth of the round hole is 0.65 time of the depth of the special-shaped through hole; the two special-shaped through holes are sequentially and symmetrically provided with a button 29 and a gland 30 from inside to outside.
As shown in fig. 8, the button 29 is a coaxial whole composed of a large cylinder and small cylinders at both ends of the large cylinder, the diameter of the large cylinder in the middle is the same as the nominal size of the circular hole aperture of the special-shaped through hole, and the diameter of the small cylinders at both sides of the large cylinder is the same as the short side of the rectangular hole in cross section; the height of the small cylinder at the inner side of the large cylinder is the same as the depth of the rectangular hole in the section, the axial length of the large cylinder is 0.35 times of the depth of the round hole in the special-shaped through hole, and the height of the small cylinder at the outer side of the large cylinder is 1.3 times of the depth of the round hole in the special-shaped through hole.
As shown in fig. 8, the gland 30 is a concentric whole consisting of a circular tube and a hollow disc at the end face of the circular tube; the outer diameter of the circular tube is the same as the nominal size of the aperture of the circular hole in the special-shaped through hole, the inner diameter of the circular tube is the same as the nominal size of the diameter of the small cylinder of the button 29, and the length of the circular tube is equal to the sum of the depth of the circular hole in the special-shaped through hole minus the axial length of the large cylinder of the button 29 and the small cylinder inside the large cylinder.
The gland 30 is fixed in the round hole of the special-shaped through hole through the hollow disc, and a small cylinder at the outer side of the button 29 penetrates through the center hole of the gland 30 to be movably connected with the round tube of the gland 30.
As shown in fig. 7 and 8, the square column type connection end has the following structure: the upper end face of the straight rack is provided with a raised square column body, and the central line of the square column body and the central line of the square connecting hole are in the same straight line; a vertical square hole is formed inwards at the middle position of the end part of the square column, and the depth of the vertical square hole is 0.55 times of the height of the square column; horizontal through holes with rectangular cross sections are symmetrically arranged at the middle positions of the two sides of the vertical square hole, the central lines of the two horizontal through holes are the same line, and the central lines of the two horizontal through holes are vertical and intersect with the central line of the vertical square hole; the distance h 0 from the center line of the horizontal through hole to the upper end face of the extendable rack 28 is equal to the distance h 0 from the center line of the special-shaped through hole to the lower end face of the extendable rack 28.
Clamping blocks 31 are symmetrically arranged in the two horizontal through holes, and a spring 32 is arranged between the two clamping blocks 31.
The clamping block 31 is a coaxial whole consisting of a rectangular chuck, a rectangular column and a trapezoidal square; the cross section of the rectangular cylinder is the same as the nominal size of the cross section of the horizontal through hole, the cross section of the rectangular chuck is 1.13 times of the corresponding size of the cross section of the rectangular cylinder, and the cross section of the rectangular cylinder is the same as the bottom area of the trapezoid square; the length of the rectangular column body along the axial direction of the clamping block 31 is the same as the depth of the horizontal through hole, and the length of the trapezoid square block along the axial direction of the clamping block 31 is the same as the depth of the horizontal square hole in the special-shaped through hole of the square hole type connecting end.
Square connecting hole of square hole formula link:
width W 1 = 0.35W;
Depth H 1 = 0.035H;
length D 1 = 0.50D;
The distance between the center line of the square connecting hole and the back surface of the straight rack is D 0+d1/2,d0 =0.2d.
Square column body of square column formula link:
The width w 2 is the same as the nominal dimension of the width w 1 of the square connecting hole;
the height h 2 is the same as the nominal size of the depth h 1 of the square connecting hole;
The depth d 2 is the same as the nominal dimension of the length d 1 of the square connecting hole;
The distance between the center line of the square column body and the back surface of the straight rack is d 0+d2/2.
Wherein: w represents the width of the back of the extendable rack, and the unit is mm;
h represents the height of the lengthened rack, and the unit is mm;
d represents the distance from the back of the extendable rack to the tooth root of the rack in mm.
As shown in fig. 9 and 10, the integral elongated rack is: the square column type connecting end of one lengthened rack 28 is inserted into the square hole type connecting end of the other lengthened rack 28, and the clamping block 31 of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of the spring 32 to form a whole.
The curvature radius of the arc-shaped plate 10 is the same as that of the circular boss of the lower base 7, and the central angle of the arc-shaped plate 10 is 43 degrees.
The two limiting blocks 14 are rectangular blocks, and the heights of the two limiting blocks 14 are the same as the thickness of the swing arm 16.
The width of the horizontal through hole is 0.35 times of the depth of the vertical square hole, and the rectangular section of the horizontal through hole is the same as the size corresponding to the rectangular section of the horizontal square hole of the special-shaped through hole at the other end.
The omnibearing automatic propulsion device of the drilling imager is used for vertically drilling upwards in a mine roadway, and the using method is as follows:
step 1, erecting a tripod 1 on the ground, installing an upper base 11 and a lower base 7 of a base 2, enabling a hollow cylinder of the upper base 11 to be embedded with a round boss of the lower base 7, and adjusting a round level 12 of the tripod 1 to stop air bubbles;
The rotation angle of the upper base 11 is adjusted, so that the plane of the large tooth rotating wheel 17 and the section of the roadway where the drilling hole is located are the same plane;
and the included angle between the swing arm 16 and the horizontal plane is regulated to be 0 degrees, so that the pushing direction of the rack type push rod 5 is on the same straight line with the center line of the vertical upward drilling.
Step 2, installing a drilling imager at the front end of a single lengthened rack of the rack type push rod 5, placing the single lengthened rack between the large gear 17 and the roller 24, and adjusting the distance between the large gear 17 and the roller 24 through the clamping bolt 26 to enable the single lengthened rack to be effectively meshed with the large gear 17;
Step 3, adjusting the relative rotation angle of the lower base 7 and the upper base 11 and the rotation angle of the swing arm 16, so that the advancing direction of the drilling imager through the rack type push rod 5 and the drilling center line are on the same straight line, the lower base 7, the screw rod 8 and the upper base 11 are mutually fixed through screwing the nut 9, further the relative rotation angle of the lower base 7 and the upper base 11 is fixed, and the bearing seat 13 and the swing arm 16 are mutually fixed through screwing the swing arm bolt 15, so that the rotation angle of the swing arm 16 is fixed;
step 4, connecting the rotary encoder 6 to a control box of the drilling imager through a signal output cable;
step 5, starting a motor 22, wherein the motor 22 drives a driving gear 21 to drive a driven gear 20 and a large gear 17 to rotate, so as to push a rack type push rod 5 to advance, and automatically and slowly pushing a drilling imager at a constant speed;
Step 6, when the residual length of the rack type push rod 5 is too short, the motor 22 is turned off, and after the motor 22 stops running, the square column type connecting end of the other lengthened rack 28 is inserted into the square hole type connecting end of the single lengthened rack;
and 7, repeating the step 5 and the step 6 until the drilling is finished.
Example 2
An omnibearing automatic propelling device of a drilling imager. Example 1 was repeated except for the following technical parameters:
the height of the circular boss is 0.6 times of the height of the lower base 7; the diameter of the circular boss is 0.3 times of the diameter of the lower base 7, and the diameter of the circular boss is 0.6 times of the diameter of the hollow cylinder.
The distance between the upper planes of the two limiting blocks and the horizontal plane where the axis of the hollow shaft is located is 0.5 times of the width of the swing arm 16.
The rack-type push rod 5 is a single lengthened rack 28.
The depth of the circular hole is 0.6 times of the depth of the special-shaped through hole.
The axial length of the large cylinder is 0.3 times of the depth of the round hole in the special-shaped through hole, and the height of the small cylinder outside the large cylinder is 1.0 times of the depth of the round hole in the special-shaped through hole.
The vertical square hole depth is 0.5 times of the square column height.
The cross section size of the rectangular chuck is 1.1 times of the corresponding size of the cross section of the rectangular cylinder.
Square connecting hole of square hole formula link:
width W 1 = 0.3W;
depth H 1 = 0.03H;
length D 1 = 0.48D.
The central angle of the arcuate plate 10 is 40.
The width of the horizontal through hole is 0.3 times of the depth of the vertical square hole
The omnibearing automatic propelling device of the drilling imager is used for horizontal drilling in a mine roadway. The method of use is the same as in example 1 except for the following technical parameters:
the rotation angle of the upper base 11 is adjusted, so that the plane of the large tooth rotating wheel 17 and the section of the roadway where the drilling hole is located are the same plane.
The included angle between the swing arm 16 and the horizontal plane is adjusted to be 90 degrees, so that the pushing direction of the rack type push rod 5 and the center line of the horizontal drilling hole are on the same straight line.
Example 3
An omnibearing automatic propelling device of a drilling imager. Example 1 was repeated except for the following technical parameters:
the height of the circular boss is 0.7 times of the height of the lower base 7; the diameter of the circular boss is 0.4 times of the diameter of the lower base 7, and the diameter of the circular boss is 0.8 times of the diameter of the hollow cylinder.
The distance between the upper planes of the two limiting blocks and the horizontal plane where the axis of the hollow shaft is positioned is 0.55 times of the width of the swing arm 16.
The rack type push rod 5 is an integral lengthened rack formed by connecting 6 lengthened racks 28.
The depth of the circular hole is 0.7 times of the depth of the special-shaped through hole.
The axial length of the large cylinder is 0.4 times of the depth of the round hole in the special-shaped through hole, and the height of the small cylinder outside the large cylinder is 1.5 times of the depth of the round hole in the special-shaped through hole.
The vertical square hole depth is 0.6 times of the square column height.
The cross section size of the rectangular chuck is 1.15 times of the corresponding size of the cross section of the rectangular cylinder.
Square connecting hole of square hole formula link:
width W 1 = 0.4W;
depth H 1 = 0.04H;
length D 1 = 0.52D.
The central angle of the arcuate plate 10 is 45 deg..
The width of the horizontal through hole is 0.4 times of the depth of the vertical square hole.
The omnibearing automatic propulsion device of the drilling imager is used for downwards drilling a hole in a mine roadway in an inclined way, and the using method is the same as that of the embodiment 1 except the following steps:
The rotation angle of the upper base 11 is adjusted, so that the plane of the large tooth rotating wheel 17 and the section of the roadway where the drilling hole is located are the same plane;
And the included angle between the swing arm 16 and the horizontal plane is adjusted to be 45 degrees, so that the pushing direction of the rack type push rod 5and the central line of the inclined downward drilling hole are on the same straight line.
Compared with the prior art, the specific embodiment has the following positive effects:
① The operation is convenient. When the drilling imager is propelled, the drilling imager is arranged at the front end of a single lengthened rack of the rack type push rod 5, the rack type push rod 5 and the large gear 17 can be effectively meshed through the clamping device 4, the driving gear 21 is driven through the motor 22, the driven gear 20 and the large gear 17 are further driven to rotate, the rack type push rod 5 is further pushed to advance, the automatic and slow uniform-speed propelling of the drilling imager is completed, the manual workload is reduced, and the operation is convenient.
The rack type push rod 5 of the embodiment adopts the lengthened rack 28, when the drilling imager is pushed in, the drilling imager is arranged at the front end of a single lengthened rack of the rack type push rod 5, when the lengthened rack type push rod 5 is needed, the square column type connecting end of the other lengthened rack 28 can be inserted into the square hole type connecting end of the single lengthened rack, and the clamping block 31 of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of the spring 32 to form a whole, and can be lengthened to 10 pieces as required; when the detachable rack 28 is required to be detached, a button of the extendable rack 28 can be pressed, and the button 29 pushes the clamping block 31 out of the special-shaped through hole to separate the square column type connecting end from the square hole type connecting end. The rack type push rod 5 can be quickly and conveniently connected and detached by the method, and meanwhile, the straight tooth distances among the lengthened racks 28 can be ensured to be equal and the connection is tight when the rack type push rod 5 is connected, so that the operation is convenient.
② The image acquisition is stable and the identification accuracy of the advancing depth is high. The drilling imager is through being connected transmission image signal with drilling imager control box, this concrete embodiment is when drilling imager advances, install the single but add long rack front end at rack type push rod 5 with drilling imager, press from both sides tight rack type push rod 5 with gear wheel 17 through clamping device 4, the gyro wheel 23 has been linked at the gyro wheel frame both ends in clamping device 4, gyro wheel 23 sticiss at but add long rack 28 back, through exerting two counter-forces to but add long rack 28 back, can effectively prevent rack type push rod 5 to take place to sway at drilling imager advancing process, fall back or break away from the condition of device, guarantee drilling imager slowly advances at the uniform velocity, improve formation of image and concatenation effect, image acquisition is steady.
In the connecting process of the rack type push rod 5, the lengthened rack 28 is adopted, when the lengthened rack is needed, the square column type connecting end of one lengthened rack 28 can be inserted into the square hole type connecting end of the other lengthened rack, the clamping block 31 of the square column type connecting end is inserted into the special-shaped through hole of the square hole type connecting end through the acting force of the spring 32 to form a whole, the rack type push rod 5 can be quickly and stably connected, shaking of a drilling imager in the connecting process of the rack type push rod 5 is effectively reduced, and the imaging and splicing effects of a test are improved.
The rotary encoder 6 employed in the present embodiment can record the number of revolutions N of the large gear 17 and the angular displacement amount Δθ of the unfinished integer number of turns from the starting point, and encode and generate a depth pulse signal. Since the length L of the drilling imager and the radius r of the adopted large gear 17 are known, the rack type push rod 5 is driven by the large gear 17 to push the drilling imager to the depth l=n.2pi r+delta theta.r+k, the push depth of the drilling imager can be directly determined, and the rotary encoder 6 can be connected with a control box of the used drilling imager to transmit a depth pulse signal, so that the identification accuracy of the push depth is high.
③ The drilling machine is suitable for omnibearing drilling of roadways and tunnels. In the specific embodiment, the direction of the drilling imager pushed by the rack type push rod 5 and the drilling center line are on the same straight line by adjusting the relative rotation angle of the lower base and the upper base 11 of the base 2 and the rotation angle of the swing arm of the clamping device 4; the lower base 7, the screw rod 8 and the upper base 11 are mutually fixed by screwing the nuts 9, so that the relative rotation angle of the lower base 7 and the upper base 11 is fixed; the bearing seat 13 and the swing arm 16 are mutually fixed by screwing the swing arm bolt 15, so that the rotation angle of the swing arm 16 is fixed. The direction of the drilling imager pushed by the rack type push rod 5 is adjusted by the method so as to test the drilling holes with different angles, so that the method is suitable for omnibearing drilling holes of roadways and tunnels.
Therefore, the specific embodiment has the characteristics of convenient operation, stable image acquisition and accurate advance depth identification, and is suitable for omnibearing drilling of roadways and tunnels.

Claims (4)

1. The omnibearing automatic propelling device of the drilling imager is characterized by comprising a tripod (1), a base (2), a gear transmission mechanism (3), a clamping device (4), a rack push rod (5) and a rotary encoder (6); the tripod (1) is fixedly connected with the lower plane of the base (2), the gear transmission mechanism (3) is fixedly connected with the upper plane of the base (2), a rotary encoder (6) is arranged at one end of a gear shaft of the gear transmission mechanism (3), the other end of the gear shaft of the gear transmission mechanism (3) is connected with the clamping device (4), and the rack push rod (5) is meshed with a large gear of the gear transmission mechanism (3) through the clamping device (4);
The base (2) comprises a lower base (7), a screw rod (8), an upper base (11) and a circular level (12); the lower base (7) and the upper base (11) are round blocks with equal diameters and equal heights, a round boss is arranged at the middle position of the upper plane of the lower base (7), and a hollow cylinder is arranged at the middle position of the lower plane of the upper base (11); the height of the circular boss is 0.6-0.7 times of the height of the lower base (7) and is the same as the nominal size of the height of the hollow cylinder; the diameter of the circular boss is 0.3-0.4 times of the diameter of the lower base (7), and the diameter of the circular boss is 0.6-0.8 times of the diameter of the hollow cylinder;
the center of the hollow cylinder of the upper base (11) is symmetrically provided with two base screw holes, the two base screw holes are communicated with the hollow cylinder, and the central lines of the two base screw holes are intersected with the central line of the hollow cylinder; one end of each screw rod (8) is fixedly provided with an arc-shaped plate (10), the two arc-shaped plates (10) are in contact with the side surfaces of the round bosses, the other ends of the two screw rods (8) penetrate through respective base screw holes to be in threaded connection with nuts (9), and the lower base (7), the screw rods (8) and the upper base (11) are mutually fixed by screwing the nuts (9); a round level (12) is arranged near the edge of the upper base (11);
the gear transmission mechanism (3) comprises a bearing seat (13), a large gear (17), a driven gear (20), a driving gear (21) and a motor (22); the bearing seat (13) is composed of two symmetrical trapezoid seat plates, the bottoms of the two trapezoid seat plates are fixedly connected with the upper plane of the base (2), gear shaft holes are symmetrically arranged at the upper parts of the two trapezoid seat plates, and the first bearings (18) are symmetrically arranged in the gear shaft holes;
A motor (22) is fixed at the lower part of the left trapezoid seat plate of the bearing seat (13), an output shaft of the motor (22) is connected with a driving gear (21) through a second bearing (23) arranged at the lower part of the left trapezoid seat plate, the driving gear (21) is meshed with a driven gear (20), the driven gear (20) is fixedly connected with a large gear (17) in a coaxial line, and two ends of a gear shaft of the large gear (17) and two ends of a gear shaft of the driven gear (20) are movably arranged in first bearings (18) corresponding to each other;
the outer end of a gear shaft (19) on the same side as the motor (22) is provided with a rotary encoder (6), the rotary encoder (6) generates a depth pulse signal through rotary encoding of a large gear (17), and the rotary encoder (6) is connected with a control box of the drilling imager through a signal output cable;
a hollow shaft is arranged at an orifice at the outer side of a gear shaft hole of a right trapezoid seat plate of the bearing seat (13), the right trapezoid seat plate and the hollow shaft are integrated, and the gear shaft hole of the right trapezoid seat plate and the hollow shaft are on the same axis; two limiting blocks (14) are horizontally arranged on the outer side of the right trapezoid seat plate, and the perpendicular bisector of the connecting line of the two limiting blocks (14) is intersected with the axis of the hollow shaft; the distance between the upper planes of the two limiting blocks and the horizontal plane where the axis of the hollow shaft is positioned is 0.5-0.55 times of the width of the swing arm (16);
The clamping device (4) comprises a swing arm (16), two rollers (24), a roller frame (25) and bolts (26); the inner end of the swing arm (16) is provided with a circular shaft hole, the circular shaft hole is connected with a hollow shaft of the bearing seat (13), and the aperture of the circular shaft hole is the same as the nominal size of the outer diameter of the hollow shaft; the hollow shaft is provided with internal threads, the swing arm bolt (15) is in threaded connection with the internal threads of the hollow shaft, and the bearing seat (13) and the swing arm (16) are mutually fixed by screwing the swing arm bolt (15);
The swing arm (16) is an integral body formed by connecting one side of a 'concave' frame and a bar rod piece, bar holes (27) are symmetrically arranged on two sides of the 'concave' frame, and roller frames (25) are symmetrically arranged on the two bar holes (27); a clamping screw hole is formed in the middle of the concave frame, the center line of the clamping screw hole is parallel to the axis of the bar-shaped rod piece, a clamping bolt (26) is screwed into the clamping screw hole, and the clamping bolt (26) is tightly pressed against the roller frame (25) through a rotating nut;
The roller frame (25) is a cross-shaped whole body consisting of a vertical rod piece and a horizontal rod piece; two ends of the horizontal rod piece are symmetrically fixed with sliding blocks, and the two sliding blocks are movably arranged in corresponding strip-shaped holes (27); the vertical rod piece is in a [ -shaped structure, rollers (24) are symmetrically arranged at two ends of the vertical rod piece, and the roller frame (25) drives the rollers (24) to tightly press the rack type push rod (5) so that racks of the rack type push rod (5) are meshed with the large gear;
The horizontal rod piece and the roller frame (25) are mutually vertical and are equally divided; the head of the clamping bolt (26) is contacted with the roller frame (25);
the roller (24) is a whole body formed by a cylinder and annular bosses at two ends of the cylinder, and the distance between the inner sides of the two annular bosses is the same as the nominal size of the width of a rack back plate of the rack push rod (5);
the rack type push rod (5) is a single lengthened rack (28) or an integral lengthened rack formed by connecting more than 2 lengthened racks (28);
The lengthened rack (28) is a straight-tooth rack, the lower end of the straight-tooth rack is a square hole type connecting end, and the upper end of the straight-tooth rack is a square column type connecting end;
The square hole type connecting end has the structure that: a square connecting hole is formed inwards at the lower end face of the straight rack, and the central line of the square connecting hole is parallel to the intersection line of the side face and the back face of the straight rack; the middle position of the square connecting hole is symmetrically provided with special-shaped through holes, and the central lines of the two special-shaped through holes are perpendicular and intersect with the central line of the square connecting hole;
The special-shaped through hole is formed by connecting a round hole and a horizontal square hole with a rectangular section, the round hole and the horizontal square hole are sequentially formed from outside to inside, and the connecting line of the central line of the horizontal square hole and the central line of the round hole forms the central line of the special-shaped through hole; the diameter of the round hole is equal to the diameter of the circumscribed circle of the rectangular hole, and the depth of the round hole is 0.6-0.7 times of the depth of the special-shaped through hole; the two special-shaped through holes are sequentially and symmetrically provided with a button (29) and a gland (30) from inside to outside;
The button (29) is a coaxial line whole formed by a large cylinder and small cylinders at two ends of the large cylinder, the diameter of the large cylinder in the middle is the same as the nominal size of the diameter of a circular hole of the special-shaped through hole, and the diameters of the small cylinders at two sides of the large cylinder are the same as the short sides of the rectangular hole in section; the height of the small cylinder at the inner side of the large cylinder is the same as the depth of the rectangular hole in the section, the axial length of the large cylinder is 0.3-0.4 times of the depth of the round hole in the special-shaped through hole, and the height of the small cylinder at the outer side of the large cylinder is 1.0-1.5 times of the depth of the round hole in the special-shaped through hole;
The gland (30) is an integral body with the same center line and composed of a circular tube and a hollow disc at the end face of the circular tube; the outer diameter of the circular tube is the same as the nominal size of the aperture of the circular hole in the special-shaped through hole, the inner diameter of the circular tube is the same as the nominal size of the diameter of the small cylinder of the button (29), and the length of the circular tube is equal to the sum of the depth of the circular hole in the special-shaped through hole minus the axial length of the large cylinder of the button (29) and the small cylinder inside the large cylinder;
the gland (30) is fixed in the round hole of the special-shaped through hole through the hollow disc, and a small cylinder at the outer side of the button (29) penetrates through the center hole of the gland (30) to be movably connected with a round tube of the gland (30);
The square column type connecting end has the structure that: the upper end face of the straight rack is provided with a raised square column body, and the central line of the square column body and the central line of the square connecting hole are in the same straight line; a vertical square hole is formed inwards at the middle position of the end part of the square column, and the depth of the vertical square hole is 0.5-0.6 times of the height of the square column; horizontal through holes with rectangular cross sections are symmetrically arranged at the middle positions of the two sides of the vertical square hole, the central lines of the two horizontal through holes are the same line, and the central lines of the two horizontal through holes are vertical and intersect with the central line of the vertical square hole; the distance h 0 from the central line of the horizontal through hole to the upper end face of the lengthened rack (28) is equal to the distance h 0 from the central line of the special-shaped through hole to the lower end face of the lengthened rack (28);
Clamping blocks (31) are symmetrically arranged in the two horizontal through holes, and a spring (32) is arranged between the two clamping blocks (31);
the clamping block (31) is a coaxial whole consisting of a rectangular chuck, a rectangular column body and a trapezoidal square block; the cross section of the rectangular cylinder is the same as the nominal size of the cross section of the horizontal through hole, the cross section of the rectangular chuck is 1.1-1.15 times of the corresponding size of the cross section of the rectangular cylinder, and the cross section of the rectangular cylinder is the same as the bottom area of the trapezoid square; the length of the rectangular column body along the axial direction of the clamping block (31) is the same as the depth of the horizontal through hole, and the length of the trapezoid square block along the axial direction of the clamping block (31) is the same as the depth of the horizontal square hole in the special-shaped through hole at the square hole type connecting end;
Square connecting hole of square hole formula link:
Width W 1 =0.3 to 0.4W,
Depth H 1 = 0.03-0.04H,
The length D 1 =0.48 to 0.52D,
The distance between the central line of the square connecting hole and the back surface of the straight rack is D 0+d1/2,d0 =0.2d;
Square column body of square column formula link:
The width w 2 is the same as the nominal dimension of the width w 1 of the square shaped attachment hole,
The height h 2 is the same as the nominal dimension of the depth h 1 of the square connecting hole,
The depth d 2 is the same as the nominal dimension of the length d 1 of the square shaped attachment hole,
The distance between the central line of the square column body and the back surface of the straight rack is d 0+d2/2;
Wherein: w represents the width of the back of the extendable rack, the unit is mm,
H represents the height of the lengthened rack, the unit is mm,
D represents the distance from the back surface of the back of the lengthened rack to the tooth root of the rack, and the unit is mm;
The integral lengthened rack is as follows: the square column type connecting end of one lengthened rack (28) is inserted into the square hole type connecting end of the other lengthened rack (28), and a clamping block (31) of the square column type connecting end is inserted into a special-shaped through hole of the square hole type connecting end through the acting force of a spring (32) to form a whole.
2. The omnibearing automatic propelling device of the drilling imager according to claim 1, characterized in that the curvature radius of the arc-shaped plate (10) is the same as that of the circular boss of the lower base (7), and the central angle of the arc-shaped plate (10) is 40-45 degrees.
3. The full-automatic propelling device of the borehole imager as set forth in claim 1, wherein the two limiting blocks (14) are rectangular blocks, and the height of the two limiting blocks (14) is the same as the thickness of the swing arm (16).
4. The omnibearing automatic propelling device of a drilling imager according to claim 1, wherein the width of the horizontal through hole is 0.3-0.4 times of the depth of the vertical square hole, and the rectangular section of the horizontal through hole is the same as the rectangular section of the horizontal square hole of the special-shaped through hole at the other end.
CN202211344422.1A 2022-10-31 2022-10-31 Omnibearing automatic propelling device of drilling imager Active CN115539021B (en)

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Citations (2)

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CN103628861A (en) * 2013-12-09 2014-03-12 岳阳奥成科技有限公司 Intelligent drilling television imaging instrument
CN113404455A (en) * 2020-03-16 2021-09-17 中国矿业大学(北京) Automatic push rod advancing device at uniform velocity

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Publication number Priority date Publication date Assignee Title
US8022983B2 (en) * 2005-04-29 2011-09-20 Schlumberger Technology Corporation Borehole imaging system for conductive and resistive drilling fluids
US11526977B2 (en) * 2019-12-18 2022-12-13 Schlumberger Technology Corporation Methods for transmitting data acquired downhole by a downhole tool

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN103628861A (en) * 2013-12-09 2014-03-12 岳阳奥成科技有限公司 Intelligent drilling television imaging instrument
CN113404455A (en) * 2020-03-16 2021-09-17 中国矿业大学(北京) Automatic push rod advancing device at uniform velocity

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