CN214330568U - Continuous pipe type gallery pressure maintaining coring equipment - Google Patents

Abstract

The utility model discloses a continuous conduit type tunnel pressure maintaining coring device, which comprises a continuous conduit operation device and a coring device; the continuous conduit operation equipment comprises a transfer device, wherein the transfer device comprises an injection head and a tunnel drilling machine; the coring device comprises an inner pipe assembly and an outer pipe assembly, the outer pipe assembly is connected with an underground drill rig through a drill rod, the inner pipe assembly is connected with a continuous guide pipe, an injection head is used for lowering/lifting the continuous guide pipe, the inner pipe assembly is connected with the outer pipe assembly in a clamping manner, the inner pipe assembly comprises an inner pipe component and a center component, the bottom of the inner pipe component is a rock core outer barrel, and the bottom of the rock core outer barrel is provided with a self-gravity valve. The utility model discloses simple structure, operating performance is good, can prevent that a coring section of thick bamboo from rotating at coring in-process, keeps the rock core pure, and the inner tube assembly breaks away from with the outer tube assembly easily.

Description

Continuous pipe type gallery pressure maintaining coring equipment

Technical Field

The utility model relates to a colliery gallery coring operation field especially relates to a core equipment is got to continuous pipe formula gallery pressurize.

Background

China is a large country for coal production and a large country for coal consumption, and coal is an important basic energy and raw material in China. The coal bed gas content and the coal bed gas pressure are main indexes for predicting and inspecting regional effect of outburst danger regions of outburst coal beds, the coal bed gas content is generally measured by methods such as ground coal bed gas content measurement, geological exploration gas content measurement, drilling and coring of underground coal beds of mines and the like, and due to differences of coal bed gas content test conditions, test methods and the like, the coal bed gas content test results are often large in difference and low in precision, estimation loss generally exists, and the guiding significance for coal mining is limited.

For the coring of coal bed tunnels, the prior art has a core taking device with a coal bed gas rope, the name of which is CN204646157U, the device uses a rope to lift/lower a corer, compressed air needs to be introduced into the core taking device to drive the core taking device to act, while the name of the core taking device with a CN107905752A, the device also uses a rope to lift/lower the corer, meanwhile, the core taking device needs to drive the core taking device to act by water pressure,

in order to further realize pressure-maintaining coring of the coal bed, a coal sample sampler with the publication number of CN201811862U is provided, which performs pressure-maintaining coring of samples by means of a viscous liquid and a vacuum device, wherein fluid media exist in the devices, certain pollution is caused to the coal bed core, the measurement of parameters such as water content and the like is influenced,

still there is application number CN201410739874.9 at present, the name is airtight coring device of ground well drilling coal bed gas, the test of stratum gas content, and the device relies on sample self pushing effect to open and starts the sealed ball valve of cutting the heart, and the structure is comparatively complicated, need change different accessories to different coal beds and realize the cutting, and the operation is difficult, and work efficiency is lower.

The coring device is generally composed of an inner pipe assembly and an outer pipe assembly, a gap exists between the inner pipe assembly and the outer pipe assembly, so that the risk of gas leakage is high, at present, a blowout prevention box arranged at the top end of a drill rod is often used for preventing gas leakage, but gas still exists in the drill rod, so that the potential safety hazard exists in the coring operation,

the clearance between the inner tube assembly and the outer tube assembly can also cause the coring barrel to easily rotate along with the coring outer barrel, when the external disturbance is large, the coring component has a large error with the real condition,

in order to reduce errors caused by rotation, a single-action device is usually arranged between an outer pipe assembly and an inner pipe assembly of the currently used coring device to reduce the rotation of a coring barrel, but the single-action device has an anti-rotation effect, but the anti-rotation effect is limited, and the measurement errors are difficult to be effectively reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a continuous pipe formula gallery pressurize coring equipment, simple structure, operating performance is good, can prevent that a coring section of thick bamboo from rotating at coring in-process, keeps the rock core pure, and inner tube assembly breaks away from with the outer tube assembly easily.

In order to achieve the purpose, the utility model adopts the following technical proposal to realize:

the utility model discloses a continuous conduit type tunnel pressure maintaining coring device, which comprises a continuous conduit operation device and a coring device;

the continuous conduit operation equipment comprises a transfer device, wherein the transfer device comprises an injection head and a tunnel drilling machine;

the coring device comprises an inner pipe assembly and an outer pipe assembly, the outer pipe assembly is connected with the tunnel drilling machine through a drill rod, the inner pipe assembly is connected with a continuous conduit, an injection head is used for lowering/lifting the continuous conduit, the inner pipe assembly and the outer pipe assembly are connected in a clamping way,

the inner tube assembly comprises an inner tube assembly and a center assembly, the bottom of the inner tube assembly is a core outer barrel, a self-gravity valve is arranged at the bottom of the core outer barrel and comprises an annular valve seat and a circular valve clack, and the edge of the circular valve clack is hinged to the edge of the top surface of the annular valve seat.

Preferably, the circular valve clack has an elastic structure, and when the self-gravity valve is opened, the circular valve clack is in a vertical position and is arc-shaped, and the circular valve clack is matched with the inner wall of the outer core barrel.

Preferably, the central component comprises a central rod, the bottom end of the central rod is fixedly connected with a piston, a pressure maintaining controller is arranged in the piston,

the pressure maintaining controller comprises a pressure maintaining cylinder, the pressure maintaining cylinder is vertically arranged, a pressure maintaining piston is arranged in the pressure maintaining cylinder, the pressure maintaining piston is in sliding fit with the inner wall of the pressure maintaining cylinder, the pressure maintaining piston divides the pressure maintaining cylinder into an upper cavity and a lower cavity, the lower cavity is communicated with the bottom surface of the piston, and gas is filled in the upper cavity.

Preferably, a composite bearing set is arranged between the inner pipe component and the central component,

the composite bearing group comprises a base, the base is in a thrust bearing form, the base is arranged in the inner pipe assembly, the inner wall of the base is provided with an annular ball recess, the middle of the positioning pipe section is provided with a plurality of ball holes along the circumferential direction, the spherical roller is arranged in the ball holes, and the convex part of the spherical roller is matched with the ball recess.

Preferably, the central component is provided with a first annular convex edge, a thrust bearing is arranged between the first annular convex edge and the inner pipe component, and the first annular convex edge is positioned between the two thrust bearings.

Preferably, the top of the inner pipe assembly is provided with an elastic clamping mechanism, the inner wall of the top of the outer pipe assembly is provided with an elastic clamping chamber, the outer wall of the elastic clamping mechanism is provided with a latch groove, a latch is installed in the latch groove, the bottom of the latch is rotatably connected with the inner wall of the latch groove, a spring is arranged between the top of the latch and the latch groove, and the latch is matched with the elastic clamping chamber.

Preferably, the bottom end of the drill rod is provided with an inner blowout prevention connector, the inner blowout prevention connector comprises a blowout prevention valve seat and a blowout prevention valve cover, and the bottom surface of the blowout prevention valve cover is provided with a torsion spring.

Preferably, the transfer device comprises an injection head through which the continuous conduit is driven, the injection head comprises two delivery mechanisms arranged side by side, the continuous conduit is positioned between the two delivery mechanisms, the continuous conduit is clamped and transferred by the two delivery mechanisms,

the conveying mechanism comprises a conveying chain, a conveying chain motor is arranged at the top of the conveying chain, a lower chain wheel is arranged at the bottom of the conveying chain, a tensioning device is arranged on the lower chain wheel, a clamping block is arranged on the conveying chain, the adjacent parts of the two conveying chains pass through a hydraulic clamping mechanism,

the clamping block comprises a clamping base and a clamping claw, wherein a friction bulge is arranged in the clamping claw, and the clamping claw is in an arc shape matched with the continuous conduit.

Preferably, transfer device still encircles including the direction, and the direction encircles the top and is equipped with a plurality of guide pulleys along length direction, and the direction encircles the top and is equipped with a plurality of pinch rollers along length direction, and the direction encircles and is equipped with hydraulic assembly between the injection head, and hydraulic assembly includes folding hydraulic stem, and the articulated injection head in folding hydraulic stem bottom, the articulated sliding block in folding hydraulic stem top, sliding block and direction encircle bottom surface sliding fit.

Preferably, the continuous conduit operation equipment further comprises a reel device, the reel device comprises a reel, the reel is mounted on a reel frame, a pipe arrangement device assembly is arranged on the reel frame and used for controlling the sequence of the reels of the continuous conduit, and the reel is driven by a reel motor;

the pipe arranging device assembly comprises a support and a torque limiter, a lifting hydraulic rod is arranged between the support and a winding drum frame, a bidirectional screw rod is arranged on the support, a guide device is arranged on the bidirectional screw rod, a mechanical counter and a rotating system are arranged in the guide device, the rotating system comprises a plurality of conveying wheels, and a lifting oil cylinder is arranged between the guide device and the bidirectional screw rod.

The utility model has the advantages that:

1. the utility model discloses use self-gravity valve simple structure, operating performance is good.

2. The utility model discloses in use anti-rotation device such as continuous pipe, compound bearing, can prevent that a core section of thick bamboo from rotating at the coring in-process, owing to be applicable to the gallery, it is limited to get the core degree of depth, and the continuous pipe length of use is limited, and it prevents turning round the ability well, can provide better anti-rotation ability.

3. The utility model discloses in use the self-gravity valve, need not additionally provide power for pressurize fidelity, can keep the core pure.

4. The utility model discloses in use composite bearing, not only can play the effect of preventing changeing to the core inner tube, can transfer/play the positioning action when mentioning at the core inner tube simultaneously.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of an outer tube assembly;

FIG. 3 is a cross-sectional view of the outer tube assembly;

FIG. 4 is a cross-sectional view of the center assembly mounted to the inner tube assembly prior to coring;

FIG. 5 is a cross-sectional view of the center assembly mounted to the inner tube assembly after coring;

FIG. 6 is a schematic view of the card ejection mechanism of FIG. 5;

FIG. 7 is a schematic view of FIG. 5 at the thrust bearing;

FIG. 8 is a schematic view of the piston of FIG. 5;

FIG. 9 is a schematic view of the self-gravity valve of FIG. 5;

FIG. 10 is a schematic view of the composite bearing set prior to coring;

FIG. 11 is a schematic view of a continuous conduit work apparatus;

FIG. 12 is a side view of the transfer device;

FIG. 13 is a schematic view of a reel assembly;

FIG. 14 is a side view of the reel assembly;

FIG. 15 is a schematic view of a guide arch and injection head;

FIG. 16 is a first schematic view of the injector head;

FIG. 17 is a second schematic view of the injector head;

FIG. 18 is a schematic diagram of a clamping block;

FIG. 19 is a schematic view of a hydraulic clamping mechanism;

FIG. 20 is a cross-sectional view of the inner tubing assembly as it passes through the inner blowout preventer joint.

In the figure: 1-reel device, 2-transmission device, 3-coring device, 4-drill rod, 51-first pipe section, 511-elastic clamping chamber, 512-suspension ring, 52-second pipe section, 53-third pipe section, 54-fourth pipe section, 55-reaming section, 551-reaming convex edge, 56-coring bit, 561-blade, 562-first slope surface, 563-first through hole, 61-locking nut, 611-first fixing screw, 62-elastic clamping mechanism, 621-latch groove, 622-latch, 623-pin shaft, 624-spring hole, 625-recess, 626-spring, 627-limiting ring, 628-first slope surface, 629-second slope surface, 63-connecting section, 631-first annular convex edge, 632-thrust bearing hole, 633-seal assembly, 64-fifth pipe segment, 641-second annular ridge, 65-sixth pipe segment, 651-first seal groove, 67-seventh pipe segment, 671-composite bearing set, 6711-base, 6712-top ring, 6713-middle ring, 6714-bottom ring, 6715-roller, 6716-ball recess, 672-fourth set screw, 68-core outer barrel, 681-annular recess, 682-self-gravity valve, 683-annular valve seat, 684-circular flap, 71-center rod, 711-second set screw, 712-piston, 713-second seal groove, 714-fourth slope, 715-third seal groove, 81-core inner barrel, 811-compensating pipe segment, 8111-third set screw, 812-positioning pipe segment, 8121-ball hole, 8122-spherical roller, 8123-third inclined plane, 813-storage cylinder, 8131-anti-skid flange, 814-fixed pipe section, 8141-second through hole, 8142-key, 8143-first key slot, 8144-second key slot, 9-continuous conduit, 101-temperature sensor, 102-pressure sensor, 103-pressure sensor, 104-signal cable, 1101-winding drum, 1102-winding drum frame, 1103-pipe arranging device assembly, 1104-bracket, 1105-lifting hydraulic rod, 1106-bidirectional lead screw, 1107-guiding device, 1108-lifting oil cylinder, 1109-transmission wheel, 1201-guiding arch, 1202-injection head, 1203-drilling machine bracket, 1204-drill rod driving device, 1205-drilling machine hydraulic cylinder, 1206-guide wheels, 1207-press wheels, 1208-folding hydraulic rods, 1209-slide blocks, 1210-outer frames, 1211-transmission chains, 1212-transmission chain motors, 1213-lower sprockets, 1214-clamping blocks, 1215-clamping bases, 1216-clamping jaws, 1217-friction protrusions, 1218-hydraulic clamping mechanisms, 1219-clamping arms, 1220-clamping hydraulic cylinders, 1221-transmission chain counters, 1222-load sensors, 1223-blowout preventer cassettes, 1224-arched beams, 1225-locking tabs, 1226-tensioners, 1301-moving mounts, 1302-tracks, 1401-valve sections, 1402-connecting pipe sections, 1403-female sections, 1404-outlet sections, male sections, 1406-blowout preventer seats, 1407-blowout preventer covers, 1408-torsion spring, 1409-cylindrical pin, 1410-fifth slope, 1411-sixth slope, 1501-pressure maintaining cylinder, 1502-pressure maintaining piston, 1503-upper chamber, 1504-lower chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in figures 1-20, the utility model discloses a continuous pipe formula gallery pressurize coring equipment, it includes that continuous pipe operation is equipped, corer 3.

The continuous conduit operation equipment comprises a reel device 1 and a transfer device 2, wherein the reel device 1 and the transfer device 2 are both provided with a movable base 1301, the movable bases 1301 are both provided with a crawler 1302,

the reel device 1 is used for accommodating the continuous conduit 9, the reel device 1 comprises a reel 1101 and a reel rack 1102, the reel 1101 is arranged on the reel rack 1102, a pipe arranging device assembly 1103 is arranged on the reel rack 1102,

the pipe arrangement device assembly 1103 comprises a support 1104 and a moment limiter, the support 1104 is rotatably connected with a winding drum frame 1102, the support 1104 and the winding drum frame 1102 are provided with lifting hydraulic rods 1105, a bidirectional screw rod 1106 is arranged on the support 1104, a guide device 1107 is arranged on the bidirectional screw rod 1106, a mechanical counter and a rotating system are arranged in the guide device 1107, a lifting oil cylinder 1108 is arranged between the guide device 1107 and the bidirectional screw rod 1106, the rotating system comprises a plurality of conveying wheels 1109, and when the continuous guide pipe 9 is in a transmission process, the guide device 1107 moves back and forth along the bidirectional screw rod 1106, so that the continuous guide pipe 9 is neatly stored on the winding drum 1101.

The transfer device 2 comprises a guide arch 1201, an injection head 1202 and a tunnel drilling machine, the tunnel drilling machine comprises a drilling machine support 1203, a drill rod driving device 1204 is arranged on the drilling machine support 1203, the bottom end of the drilling machine support 1203 is hinged with a movable base 1301, a drilling machine hydraulic cylinder 1205 is arranged between the drilling machine support 1203 and the movable base 1301, the top end of the drilling machine support 1203 is hinged with the injection head 1202,

the bottom end of the guide arch 1201 is hinged with the top end of the injection head 1202, a plurality of guide wheels 1206 are arranged at the top of the guide arch 1201 at equal intervals along the length direction, a plurality of pinch rollers 1207 are arranged at the top of the guide arch 1201 at equal intervals along the length direction, the guide wheels 1206 and the pinch rollers 1207 form a supply channel of the continuous conduit 9,

the bottom of the guide arch 1201 is provided with a hydraulic assembly, the hydraulic assembly comprises a folding hydraulic rod 1208, the bottom end of the folding hydraulic rod 1208 is hinged with an injection head 1202, the top end of the folding hydraulic rod 1208 is hinged with a sliding block 1209, the sliding block 1209 is in sliding fit with the bottom surface of the guide arch 1201, the guide arch 1201 comprises a plurality of arch beams 1224, the arch beams 1224 are in hinged fit, locking pieces 1225 are arranged between the adjacent arch beams 1224, the locking pieces 1225 are used for locking the guide arch 1201 when the arch beams 1224 are extended to prevent the guide arch 1201 from collapsing,

the injection head 1202 comprises an outer frame 1210, two conveying mechanisms arranged side by side are installed in the outer frame 1210, a continuous conduit 9 is positioned between the two conveying mechanisms, each conveying mechanism comprises a conveying chain 1211, a conveying chain motor 1212 is arranged at the top of each conveying chain 1211, a lower chain wheel 1213 is arranged at the bottom of each conveying chain 1211, a tensioning device 1226 is arranged on each lower chain wheel 1213, each tensioning device 1226 is used for keeping the conveying chain 1211 in a tensioning state, a clamping block 1214 is installed on each conveying chain 1211, each clamping block 1214 comprises a clamping base 1215 and a clamping claw 1216, a friction bulge 1217 is arranged in each clamping claw 1216, adjacent parts of the two conveying chains 1211 pass through a hydraulic clamping mechanism 1218, each hydraulic clamping mechanism 1218 comprises two clamping arms 1219, clamping hydraulic cylinders 1220 are respectively arranged at two ends of each clamping arm 1219, the clamping arms 1219 are in sliding fit with the conveying chains 1211, a turning device is arranged between the injection head 1202 and a drilling machine support 1203, a conveying chain counter 1221 is arranged in the outer frame 1210, The load sensor 1222 is connected with the coring device 3 through the drill rod 4 by the drill rod drive 1204 of the transmission device 2.

The coring device 3 comprises an outer pipe assembly and an inner pipe assembly, wherein the inner pipe assembly is lifted or lowered through a continuous guide pipe to move, the inner pipe assembly is installed inside the outer pipe assembly, the outer wall of the inner pipe assembly is in clearance fit with the inner wall of the outer pipe assembly, the inner pipe assembly comprises an inner pipe component and a center component, the center component is installed in the inner pipe component, the outer wall of the center component is in sliding fit with the inner wall of the inner pipe component, and the outer pipe assembly is connected with the drill rod 4.

The outer pipe assembly comprises a first pipe section 51, a second pipe section 52, a third pipe section 53, a fourth pipe section 54, a reaming section 55 and a core bit 56 which are coaxially installed and connected from top to bottom,

the first pipe section 51, the second pipe section 52, the third pipe section 53 and the fourth pipe section 54 form an outer pipe,

the first pipe section 51 is detachably connected with the second pipe section 52, the bottom end of the first pipe section 51 is a male head, the top end of the second pipe section 52 is a female head, the middle of the first pipe section 51 is provided with an elastic clamping chamber 511, the elastic clamping chamber 511 is arranged along the circumferential direction, a first sealing ring is arranged between the first pipe section 51 and the second pipe section 52 and is in sliding fit with the inner pipe assembly, a suspension ring 512 is arranged between the first pipe section 51 and the second pipe section 52, the suspension ring 512 is matched with the bottom edge of the elastic clamping mechanism 62, and when the inner pipe assembly reaches a preset position in the outer pipe assembly, the bottom surface of the elastic clamping mechanism 62 is located on the suspension ring 512 and is used for limiting the downward position of the inner pipe assembly.

The second pipe section 52 is detachably connected with the third pipe section 53, the bottom end of the second pipe section 52 is a male head, the top end of the third pipe section 53 is a female head,

the third pipe section 53 is detachably connected with the fourth pipe section 54, the bottom end of the third pipe section 53 is a male head, the top end of the fourth pipe section 54 is a female head,

the fourth pipe section 54 is detachably connected with the reaming section 55, the bottom end of the fourth pipe section 54 is a male head, the top end of the reaming section 55 is a female head, the outer wall of the reaming section 55 is circumferentially provided with a plurality of reaming convex ridges 551, the reaming convex ridges 551 are arranged at an angle with the vertical direction, an oblique channel is formed between adjacent reaming convex ridges 551,

reaming section 55 can be dismantled with core bit 56 and be connected, 55 bottoms of reaming section are public head, 56 tops of core bit are female, the blade 561 of drill bit is arranged on core bit 56's bottom surface, a plurality of blades 561 use core bit 56 central points to be annular array distribution as the centre of a circle, core bit 56 bottom surface center is equipped with first through-hole 563, first through-hole 563 diameter is less than core bit 56 internal diameter, core bit 56 middle part inner wall is equipped with from the top first domatic 562 that reduces gradually to the end diameter.

The inner pipe component comprises a locking nut 61, an elastic clamping mechanism 62, a connecting section 63, a fifth pipe section 64, a sixth pipe section 65, a seventh pipe section 67 and a core outer cylinder 68 which are arranged from top to bottom in sequence,

the locking nut 61 is detachably connected with the snapping mechanism 62, the bottom end of the locking nut 61 is a female head, the top end of the snapping mechanism 62 is a male head, the top surface of the locking nut 61 is provided with a first fixing screw 611, the first fixing screw 611 is arranged along the axial direction, the first fixing screw 611 penetrates through the locking nut 61 and then is inserted into a concave pit on the top surface of the snapping mechanism 62, the first fixing screw 611 is in threaded connection with the locking nut 61,

the elastic clamping mechanism 62 is detachably connected with the connecting section 63, the bottom end of the elastic clamping mechanism 62 is a female head, the top end of the connecting section 63 is a male head, the outer wall of the elastic clamping mechanism 62 is provided with two latch grooves 621, the latch grooves 621 are arranged along the circumferential direction, two latch grooves 621 are arranged oppositely, a latch 622 is arranged in each latch groove 621, a pin shaft 623 is arranged between two side walls of each latch groove 621 and penetrates through each latch 622, each pin shaft 623 is rotatably connected with each latch 622 and is arranged at the bottom of each latch groove 621, a spring hole 624 is arranged on the top of each latch 622 facing the elastic clamping mechanism 62, a recess 625 is arranged at the top of each latch groove 621, a spring 626 is arranged between each latch 622 and each latch groove 626, one end of each spring is inserted into each spring hole 624, the other end of each spring 626 is inserted into each recess 625, a limit ring 627 is arranged at the edge of the top of each latch groove 621, each limit ring 627 is sleeved on the periphery of the elastic clamping mechanism 62, and is connected with the elastic clamping mechanism 62 in a sliding manner, the bottom surface of the limiting ring 627 is a first inclined surface 628 facing the latch groove 621, the top surface of the latch 622 facing away from the latch mechanism 62 is a second inclined surface 629, the first inclined surface 628 is adapted to the second inclined surface 629 to control the ejecting distance of the top of the latch 622, the inner wall of the bottom of the latch mechanism 62 is a stepped hole structure,

the middle part of the connecting section 63 is provided with a first annular convex edge 631, the inner wall of the top end of the fifth pipe section 64 is provided with a second annular convex edge 641, the first annular convex edge 631 is positioned in the fifth pipe section 64, the periphery of the first annular convex edge 631 is in clearance fit with the inner wall of the fifth pipe section 64, a thrust bearing 632 is arranged between the top surface of the first annular convex edge 631 and the bottom surface of the second annular convex edge 641, a sealing assembly 633 is arranged between the inner wall of the first annular convex edge 631 and the outer wall of the connecting section 63,

the fifth pipe section 64 is detachably connected with the sixth pipe section 65, the bottom end of the fifth pipe section 64 is a female head, the top end of the sixth pipe section 65 is a male head, a thrust bearing 632 is arranged between the top surface of the sixth pipe section 65 and the bottom surface of the first annular convex edge 631, a first sealing groove 651 is arranged on the periphery of the bottom of the male head of the sixth pipe section 65, an O-shaped sealing ring is arranged in the first sealing groove 651,

the sixth pipe section 65 is detachably connected with the seventh pipe section 67, the bottom end of the sixth pipe section 65 is a male head, the head end of the seventh pipe section 67 is a female head, the inner wall of the head of the seventh pipe section 67 is provided with a composite bearing group 671, the composite bearing group 671 is fixed in the seventh pipe section 67 through a fourth fixing screw 672,

the seventh pipe section 67 is detachably connected with the core outer cylinder 68, the bottom end of the seventh pipe section 67 is a male head, the top end of the core outer cylinder 68 is a female head, an annular recess 681 is arranged on the inner wall of the bottom end of the core outer cylinder 68, a self-gravity valve 682 is mounted at the top of the annular recess 681, the self-gravity valve 682 comprises an annular valve seat 683 and a circular valve flap 684, the annular valve seat 683 is fixedly connected with the inner wall of the annular recess 681, the circular valve flap 684 is of a deformable structure, the edge of the circular valve flap 684 is hinged with the top edge of the annular valve seat 683, the size of a channel in the center of the annular valve seat 683 is gradually reduced from top to bottom, when the self-gravity valve 682 is opened, the circular valve flap 684 is arc-shaped, and the circular valve flap 684 is stored in the annular recess 681,

the locking section is installed to annular 681 bottom, and locking section top inner wall is the shoulder hole structure, and locking section bottom outer wall is for the second that reduces from the top to the end size gradually domatic, and first domatic 562 adaptation second is domatic.

The central component comprises a central rod 71 and a core inner cylinder 81, the bottom of the central rod 71 is inserted into the core inner cylinder 81, the central rod 71 is in sliding fit with the core inner cylinder 81, the core outer cylinder 68 and the core inner cylinder 81 form a core cylinder,

the top of the card ejecting mechanism 62 is provided with a second fixing screw 711, the second fixing screw 711 is arranged along the radial direction, the second fixing screw 711 penetrates the top of the card ejecting mechanism 62 and is inserted into the central rod 71,

the core inner cylinder 81 comprises a compensation pipe section 811, a positioning pipe section 812 and a storage cylinder 813 which are sequentially arranged from top to bottom,

the compensating pipe section 811 is detachably connected with the positioning pipe section 812, the bottom end of the compensating pipe section 811 is a male head, the top end of the positioning pipe section 812 is a female head, a third fixing screw 8111 penetrates through the positioning pipe section 812 and then is screwed into the compensating pipe section 811, the compensating pipe section 811 is in sliding fit with the central rod 71,

the positioning pipe section 812 is detachably connected with the storage cylinder 813, the bottom end of the positioning pipe section 812 is a male head, the top end of the storage cylinder 813 is a female head, a gap is formed between the inner wall of the positioning pipe section 812 and the central rod 71,

the composite bearing set 671 comprises a base 6711, the base 6711 is a thrust bearing, an annular ball recess 6716 is arranged on the inner wall of the base 6711, a plurality of ball holes 8121 are arranged in the middle of the positioning pipe section 812 along the circumferential direction, the spherical roller 8122 is installed in the ball holes 8121, the protruding part of the spherical roller 8122 can slide in the ball recess 6716, the depth of the ball recess 6716 is small, when the positioning pipe section 812 is moved upwards by external force, the spherical roller 8122 can slide out of the ball recess 6716 easily,

the base 6711 comprises a top ring 6712, a middle ring 6713 and a bottom ring 6714 which are sequentially stacked, a roller 6715 is arranged between the top ring 6712 and the middle ring 6713, a roller 6715 is arranged between the middle ring 6713 and the bottom ring 6714, a ball recess 6716 is arranged on the inner wall of the middle ring 6713,

the fixed pipe section 814 is installed on the inner wall of the top of the positioning pipe section 812, the fixed pipe section 814 is sleeved on the periphery of the central rod 71, the key 8142 is spherical, the fixed pipe section 814 is provided with a second through hole 8141 for adapting the key 8142, the diameter of the key 8142 is larger than the length of the second through hole 8141, the inner wall of the positioning pipe section 812 is provided with a first key groove 8143, the first key groove 8143 is adapted to the key 8142, the outer wall of the bottom of the central rod 71 is provided with a second key groove 8144, the second key groove 8144 is adapted to the key 8142,

before coring, the key 8142 is positioned in the second through hole 8141 and the first key slot 8143, the fixed pipe section 814 is fixedly connected with the positioning pipe section 812 through the key 8142,

when coring, the central rod 71 moves upwards, the key 8142 is disengaged from the first key slot 8143, then the key 8142 enters the second key slot 8144, the fixed pipe section 814 is fixedly connected with the central rod 71 through the key 8142, the central rod 71 drives the fixed pipe section 814 to move upwards, the fixed pipe section 814 abuts against the bottom surface of the compensation pipe section 811, the central rod 71 further drives the core inner cylinder 81 to move upwards,

the inner wall edge of the bottom surface of the positioning pipe section 812 is a third inclined surface 8123 with the diameter gradually increasing from top to bottom,

the inner wall of the bottom of the storage cylinder 813 is provided with a plurality of anti-skid convex ribs 8131 along the axial direction, and the anti-skid convex ribs 8131 are of an annular structure.

The bottom end of the central rod 71 is fixedly connected with a piston 712, the periphery of the bottom end of the central rod 71 is provided with a plurality of second sealing grooves 713, an O-shaped sealing ring is arranged in each second sealing groove 713, the O-shaped sealing ring at the bottom end of the central rod 71 is used for being in sealing connection with the inner wall of the positioning pipe section 812, the central rod 71 and the piston 712 are integrally manufactured, the coiling device 1 provides a continuous guide pipe 9 for the transfer device 2, the continuous guide pipe 9 penetrates through the drill rod 4 and is connected with the top end of the central rod 71,

the outer edge of the top surface of the piston 712 is a fourth inclined surface 714 with a diameter gradually increasing from top to bottom, the third inclined surface 8123 is matched with the fourth inclined surface 714, the piston 712 is connected with the inner wall of the storage cylinder 813 in a sliding manner, the outer periphery of the top of the piston 712 is provided with a third sealing groove 715, a sealing ring is arranged in the third sealing groove 715,

be equipped with the pressurize controller in the piston 712, the pressurize controller includes pressurize jar 1501, and the vertical setting of pressurize jar 1501 is equipped with pressurize piston 1502 in the pressurize jar 1501, and pressurize piston and pressurize jar inner wall sliding fit, pressurize piston 1502 divide into mutually isolated upper portion cavity 1503, lower part cavity 1504 with pressurize jar 1501, and lower part cavity 1504 communicates with storage cylinder 813, is filled with gas in the upper portion cavity 1503, like nitrogen gas etc.

The bottom of the drill rod 4 is provided with an inner blowout prevention joint which comprises a valve pipe section 1401 and a connecting pipe section 1402, the valve pipe section 1401 is detachably connected with the connecting pipe section 1402, the bottom end of the valve pipe section 1401 is a male head, the top end of the connecting pipe section 1402 is a female head,

the top of the connecting pipe section 1402 is a female section 1403, the bottom of the connecting pipe section 1402 is an outlet section 1404, the inner diameter of the female section 1403 is larger than that of the outlet section 1404, the inner diameter of the outlet section 1404 is larger than that of the inner pipe assembly,

the bottom of the valve pipe section 1401 is a male head section 1405, the bottom end of the valve pipe section 1401 is a blowout preventer valve seat 1406, the bottom surface of the valve pipe section 1401 is provided with a blowout preventer cover 1407, the edge of the blowout preventer cover 1407 is rotatably connected with the edge of the bottom surface of the valve pipe section 1401, the bottom surface of the blowout preventer cover 1407 is provided with a torsion spring 1408, one end of the torsion spring 1408 is connected with the blowout preventer cover 1407, the other end of the torsion spring 1408 is connected with the inner wall of the female head section 1403, the sealing surface of the blowout preventer valve seat 1406 is a fifth inclined surface 1410 with gradually increasing diameter from top to bottom, the sealing surface of the blowout preventer cover 1407 is a sixth inclined surface 1411, the fifth inclined surface 1410 is matched with the sixth inclined surface 1411,

in order to better secure the torsion spring 1408 to the lubricator cap 1407, a cylindrical pin 1409 is provided, the cylindrical pin 1409 is provided on the bottom surface of the lubricator cap 1407, the cylindrical pin 1409 penetrates through the lubricator cap 1407 and the middle of the torsion spring 1408,

the sum of the length of the male head section 1405 and the diameter of the blowout preventer cap 1407 is less than or equal to the length of the female head section 1403, when the utility model is in an open state, i.e. the blowout preventer cap 1407 is in a vertical state, the blowout preventer cap 1407 is still in the female head section 1403,

the lubricator cap 1407 may be a deformable structure, and when the lubricator cap 1407 is pushed open by the inner pipe assembly, the lubricator cap 1407 may be curved to abut against the inner wall of the female head 1403, so that the device structure is more compact.

In actual use, after the inner tube assembly and the center assembly are assembled together, the continuous guide tube 9 is used to connect the top end of the center rod 71, the inner tube assembly is installed into the outer tube assembly, the latch mechanism 62 is engaged in the latch slot 621,

when coring is carried out, the central rod 71 is lifted up through the continuous conduit 9, the second fixing screw 711 is broken under the action of shearing force, the central component is separated from the inner pipe component, the storage cylinder 813 is kept still at the moment, the piston 712 moves upwards, the rock core enters the storage cylinder 813, after the third inclined surface 8123 is in contact with the fourth inclined surface 714, the central rod 71 drives the rock core inner cylinder 81 to move upwards, and after the bottom end of the rock core inner cylinder 81 is removed from the upper end of the circular valve clack 684, the circular valve clack 684 is closed towards the annular valve seat 683 under the action of gravity and elasticity, so that the coring work of pressure maintaining and gas protecting is achieved.

In the working process, the continuous guide pipe 9 is connected with the central rod 71, for coal mine coring, the used continuous guide pipe 9 has shorter length, the continuous guide pipe 9 has good torsion resistance,

meanwhile, the utility model uses the composite bearing group 671, the spherical roller 8122 is arranged between the composite bearing group 671 and the positioning pipe section 812, which can also prevent the rotation of the core inner cylinder 81,

the utility model is also provided with a connecting section 63 which can transmit the rotation of the outer tube assembly to the core outer tube 68, reduce the influence of the outer tube assembly on the core inner tube 81, further prevent the core inner tube 81 from rotating,

the center assembly and the inner tube assembly are provided with two sets of thrust bearings 632, and when the snapping mechanism 62 rotates, the two sets of thrust bearings 632 act to prevent the core barrel from rotating.

Before coring, the upper chamber 1503 is filled with nitrogen, the holding piston 1502 is located at the bottom of the holding cylinder 1501,

during coring, the center assembly is lifted, the core enters the core barrel, the piston 712 is lifted to reduce the resistance of the core barrel to the core, meanwhile, the lower chamber 1504 is filled with gas, the pressure maintaining piston 1502 moves upwards after receiving the gas pressure in the environment, the gas in the upper chamber 1503 is compressed,

after coring, the self-gravity valve 682 is closed, the coring barrel forms a closed structure, if gas leakage occurs, the gas in the upper chamber 1503 expands, and the gas in the lower chamber 1504 is filled into the coring barrel, so that the pressure loss is reduced, and the pressure maintaining effect is achieved.

The main coring workflow comprises the following steps:

s1, installing continuous pipe operation equipment;

s2, connecting the coring bit 56 with the outer pipe to assemble the outer pipe assembly, connecting the outer pipe assembly and the drill rod 4 by using the related equipment of the tunnel drilling machine, and gradually lowering the outer pipe assembly from the ground to the coring position;

s3, after the inner pipe assembly is assembled on the ground, connecting the continuous guide pipe 9 with the central rod 71 of the inner pipe assembly through a quick connector;

s4, continuously lowering the continuous pipe 9 through the continuous pipe operation equipment, thereby lowering the inner pipe assembly in the drill pipe 4, and the inner pipe assembly reaches the corresponding position of the outer pipe assembly (the latch 622 of the elastic clamping mechanism 62 enters the elastic clamping chamber 511, and the elastic clamping mechanism 62 is located on the suspension ring 512);

s5, starting a ground drilling machine, rotating the drill rod driving device 1204 and performing pressurized drilling, wherein the inner pipe assembly and the outer pipe assembly are matched to perform downward drilling to start coring operation, and the ground blowout prevention box 1223 realizes sealing of a wellhead of the drilling tool;

s6, in the coring operation process, the continuous conduit operation equipment stops lowering the continuous conduit 9, the position of the continuous conduit 9 in the drill rod 4 is kept unchanged, the central component is kept static, along with the downward movement of the inner pipe component and the outer pipe assembly, the core enters the barrel,

in the operation process, under the combined action of the multiple anti-rotation mechanisms and the continuous conduit 9 and under the working condition of the rotation of the external drilling tool, the inner core barrel 81 is kept static, the disturbance to the core is reduced,

meanwhile, the piston 712 has a suction effect on the core, so that the resistance of the core entering the barrel is reduced;

s7, after coring is finished, the core inner cylinder 81 is filled with the core, the piston 712 of the central rod 71 moves to the positioning pipe section 812, and coring is finished;

s8, starting continuous conduit operation equipment, lifting the continuous conduit 9, enabling the continuous conduit 9 to pull the core barrel upwards through the central rod 71, enabling the anti-skid convex ridge 8131 at the end part of the core inner barrel 81 to block off the core, enabling the pressure maintaining controller to act, lifting the core into the pressure maintaining cabin, and closing the circular valve clack 684 of the gravity valve 682 at the lower end of the pressure maintaining cabin;

s9, continuously lifting the continuous guide pipe 9, when the lifting force is larger than F, the elastic clamping mechanism 62 contracts, the inner pipe assembly is lifted out of the outer pipe assembly, and then the continuous guide pipe 9 is quickly lifted;

s10, an inner blowout prevention joint is arranged at the lower part of the drill rod 4, and in the process of lifting the inner pipe assembly, after passing through the inner blowout prevention joint, the blowout prevention valve cover 1407 is closed to separate the hole bottom from the hollow drill rod 4, so that gas in the hole bottom environment is prevented from diffusing outwards;

s11, after the inner pipe assembly is lifted out of the drill rod 4 through the continuous guide pipe 9, the quick connector at the tail end of the continuous guide pipe 9 is disassembled, the inner pipe assembly is taken down for disassembly, the fidelity cabin part is placed into the transfer cabin, and the upper hanging part is used for the second time.

Wherein step S1 includes the following substeps:

s101, conveying the transmission device 2 to a coring place, and conveying the coiling device 1 to the rear of the transmission device 2;

s102, erecting a hydraulic cylinder support 1104 by using a hydraulic cylinder 1205 of the drilling machine, and erecting an injection head 1202 together;

s103, the turnover device is driven, and the injection head 1202 becomes a horizontal state.

Step S4 includes the following substeps:

s401, driving the turnover device, and enabling the injection head 1202 to be in a vertical state;

s402, the folding hydraulic rod 1208 acts, the plurality of arch beams 1224 extend, and the guide arch 1201 is lifted;

s403, the continuous conduit 9 extends into the guide arch 1201 from the reel device 1 through the pipe discharging device assembly 1103;

s404, the continuous catheter 9 extends into the injection head 1202 from the guide arch 1201, the conveying chain 1211 moves in the injection head 1202, the clamping block 1214 on the conveying chain 1211 is clamped outside the continuous catheter 9, the clamping block 1214 moves along with the conveying chain 1211, the clamping block 1214 clamped on the periphery of the continuous catheter 9 clamps the continuous catheter 9 under the action of the hydraulic clamping mechanism 1218, and the continuous catheter 9 moves downwards;

s405, assembling an inner pipe assembly, and connecting the continuous guide pipe 9 with a central rod of the inner pipe assembly through a quick connector.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a continuous pipe formula gallery pressurize coring and equip which characterized in that: comprises continuous conduit operation equipment and a coring device;

the continuous conduit operation equipment comprises a transfer device, wherein the transfer device comprises an injection head and a tunnel drilling machine;

the coring device comprises an inner pipe assembly and an outer pipe assembly, the outer pipe assembly is connected with the tunnel drilling machine through a drill rod, the inner pipe assembly is connected with a continuous conduit, an injection head is used for lowering/lifting the continuous conduit, the inner pipe assembly and the outer pipe assembly are connected in a clamping way,

the inner pipe assembly comprises an inner pipe assembly and a center assembly, the bottom of the inner pipe assembly is a core outer barrel, and a self-gravity valve is arranged at the bottom of the core outer barrel.

2. The coring apparatus of claim 1, wherein: the self-gravity valve comprises an annular valve seat and a circular valve clack, the edge of the circular valve clack is hinged with the edge of the top surface of the annular valve seat,

the circular valve clack has an elastic structure, when the self-gravity valve is opened, the circular valve clack is in a vertical position, the circular valve clack is arc-shaped, and the circular valve clack is matched with the inner wall of the outer core barrel.

3. The coring apparatus of claim 1, wherein: the central component comprises a central rod, the bottom end of the central rod is fixedly connected with a piston, a pressure maintaining controller is arranged in the piston,

the pressure maintaining controller comprises a pressure maintaining cylinder, the pressure maintaining cylinder is vertically arranged, a pressure maintaining piston is arranged in the pressure maintaining cylinder, the pressure maintaining piston is in sliding fit with the inner wall of the pressure maintaining cylinder, the pressure maintaining piston divides the pressure maintaining cylinder into an upper cavity and a lower cavity, the lower cavity is communicated with the bottom surface of the piston, and gas is filled in the upper cavity.

4. The coring apparatus of claim 1, wherein: a composite bearing set is arranged between the inner pipe component and the central component, the central component comprises a positioning pipe section,

the composite bearing group comprises a base, the base is in a thrust bearing form, the base is arranged in the inner pipe assembly, the inner wall of the base is provided with an annular ball recess, the middle of the positioning pipe section is provided with a plurality of ball holes along the circumferential direction, the spherical roller is arranged in the ball holes, and the convex part of the spherical roller is matched with the ball recess.

5. The coring apparatus of claim 4, wherein: the central component is provided with a first annular convex edge, a thrust bearing is arranged between the first annular convex edge and the inner pipe component, and the first annular convex edge is positioned between the two thrust bearings.

6. The coring apparatus of claim 1, wherein: the top of the inner pipe component is provided with an elastic clamping mechanism, the inner wall of the top of the outer pipe assembly is provided with an elastic clamping chamber,

the outer wall of the elastic clamping mechanism is provided with a latch groove, a latch is installed in the latch groove, the bottom of the latch is rotatably connected with the inner wall of the latch groove, a spring is arranged between the top of the latch and the latch groove, and the latch is matched with the elastic clamping chamber.

7. The coring apparatus of claim 1, wherein: the bottom end of the drill rod is provided with an inner blowout prevention joint, the inner blowout prevention joint comprises a blowout prevention valve seat and a blowout prevention valve cover, and the bottom surface of the blowout prevention valve cover is provided with a torsion spring.

8. The coring apparatus of claim 1, wherein: the transfer device comprises an injection head, the continuous conduit is driven by the injection head, the injection head comprises two transfer mechanisms arranged side by side, the continuous conduit is positioned between the two transfer mechanisms, the continuous conduit is clamped and transferred by the two transfer mechanisms,

the conveying mechanism comprises conveying chains, a conveying chain motor is arranged at the top of each conveying chain, a lower chain wheel is arranged at the bottom of each conveying chain, a tensioning device is arranged on each lower chain wheel, a clamping block is arranged on each conveying chain, adjacent parts of the two conveying chains pass through a hydraulic clamping mechanism,

the clamping block comprises a clamping base and a clamping claw, wherein a friction bulge is arranged in the clamping claw, and the clamping claw is in an arc shape matched with the continuous conduit.

9. The coring apparatus of claim 8, wherein: the transfer device further comprises a guide arch, a plurality of guide wheels are arranged on the top of the guide arch along the length direction, a plurality of pinch rollers are arranged on the top of the guide arch along the length direction, a hydraulic assembly is arranged between the guide arch and the injection head and comprises a folding hydraulic rod, the bottom end of the folding hydraulic rod is hinged with the injection head, the top end of the folding hydraulic rod is hinged with a sliding block, and the sliding block and the guide arch are in sliding fit.

10. The coring apparatus of claim 1, wherein: the continuous conduit operation equipment also comprises a reel device, the reel device comprises a reel, the reel is arranged on a reel frame, a pipe arranging device assembly is arranged on the reel frame and is used for controlling the sequence of the reels of the continuous conduit, the reel is driven by a reel motor,

the pipe arranging device assembly comprises a support and a torque limiter, a lifting hydraulic rod is arranged between the support and a winding drum frame, a bidirectional screw rod is arranged on the support, a guide device is arranged on the bidirectional screw rod, a mechanical counter and a rotating system are arranged in the guide device, the rotating system comprises a plurality of conveying wheels, and a lifting oil cylinder is arranged between the guide device and the bidirectional screw rod.

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