CN113445902A - Self-closing multichannel high-pressure drill rod - Google Patents
Self-closing multichannel high-pressure drill rod Download PDFInfo
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- CN113445902A CN113445902A CN202110920493.0A CN202110920493A CN113445902A CN 113445902 A CN113445902 A CN 113445902A CN 202110920493 A CN202110920493 A CN 202110920493A CN 113445902 A CN113445902 A CN 113445902A
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- drill rod
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- connecting seat
- connector
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- 238000007789 sealing Methods 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000001960 triggered effect Effects 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 34
- 239000000498 cooling water Substances 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 196
- 239000010720 hydraulic oil Substances 0.000 description 12
- 239000000110 cooling liquid Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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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
- E21B12/00—Accessories for drilling tools
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a self-closing multi-channel high-pressure drill rod, which belongs to the technical field of drill rods and comprises a drill rod body, wherein the drill rod body comprises a drill rod outer cylinder and a drill rod inner cylinder which is fixed on the inner side of the drill rod outer cylinder and coaxially arranged with the drill rod outer cylinder; the oil duct connector and the oil duct connecting seat are respectively provided with a sealing mechanism for sealing the corresponding oil duct, and when the connected drill rods are connected, the sealing mechanism is triggered to open the corresponding oil duct so as to communicate the corresponding oil ducts of the adjacent drill rods. The hydraulic hammer improves the service life of the hydraulic hammer, avoids the influence of the connection and disassembly processes of the drill rod on the circulation of an oil way, and improves the drilling efficiency.
Description
Technical Field
The invention belongs to the technical field of drill rods and relates to a self-closing multi-channel high-pressure drill rod.
Background
The technology of drilling holes by using a hydraulic hammer for a coal mine tunnel is characterized in that a hammer piston in the hydraulic hammer is driven to do high-frequency reciprocating motion by using cooling water as a working medium, impact force is applied to a drill bit to break rock, and the hydraulic hammer is considered to be the most suitable process for drilling hard rock at present by virtue of high drilling efficiency and good hole forming quality. However, underground water is used as cooling water in coal mine drilling construction, corrosive substances and micro particles are contained in the underground water, and a piston of the hydraulic hammer is seriously worn and has a short service life because of being in an environment of impact, corrosion and abrasive particles of the underground water for a long time, so that the drilling efficiency is seriously influenced, and a large amount of economic loss is caused.
Disclosure of Invention
In view of this, the present application provides a self-closing multi-channel high-pressure drill pipe to prolong the service life of a hydraulic hammer.
In order to achieve the purpose, the invention provides the following technical scheme:
a self-closing multi-channel high-pressure drill rod comprises a drill rod body, wherein the drill rod body comprises a drill rod outer cylinder and a drill rod inner cylinder which is fixed on the inner side of the drill rod outer cylinder and coaxially arranged with the drill rod outer cylinder, a space which is enclosed by the drill rod outer cylinder and the drill rod inner cylinder is a cooling water channel, the drill rod inner cylinder is provided with a partition board along the axial lead of a drill rod so as to divide the drill rod inner cylinder into a drill rod first oil channel and a drill rod second oil channel, and two ends of the drill rod body are respectively provided with an oil channel connector and an oil channel connecting seat; the oil duct connector is provided with an oil duct connector first oil duct and an oil duct connector second oil duct which are respectively communicated with the drill rod first oil duct and the drill rod second oil duct; the oil duct connecting seat is provided with an oil duct connecting seat first oil duct and an oil duct connecting seat second oil duct which are respectively communicated with the drill rod first oil duct and the drill rod second oil duct, and the oil duct connecting seat first oil duct and the oil duct connecting seat second oil duct can be respectively connected with the oil duct connector first oil duct and the oil duct connector second oil duct to form a passage; and sealing mechanisms are arranged in the first oil duct of the oil duct connector, the second oil duct of the oil duct connector, the first oil duct of the oil duct connecting seat and the second oil duct of the oil duct connecting seat to seal corresponding oil ducts, and the sealing mechanisms are triggered to open the corresponding oil ducts when the connected drill rods are connected so as to communicate the corresponding oil ducts of the adjacent drill rods.
Optionally, the drill rod further comprises support components positioned at two ends of the drill rod body, wherein each support component comprises an inner support ring, an expansion ring and a plurality of slips, the inner support ring is sleeved on the inner drill rod cylinder and is fixedly connected with the inner drill rod cylinder, the expansion ring is sleeved on the inner support ring, and the slips are arranged in the circumferential direction of the expansion ring; one end of the inner support ring is provided with taper in the circumferential direction, and the other end of the inner support ring is provided with external threads; one end of the expansion ring is provided with an internal thread matched with the external thread of the inner support ring, and the other end is provided with a plurality of expansion joints for the expansion end to expand along with the rotation of the expansion ring and the inner support ring; the slips are arranged corresponding to the expansion ends of the expansion rings and are uniformly distributed at the expansion ends of the expansion rings.
Optionally, a limiting pin for limiting the position of the slip is arranged between the slip and the expansion ring, the inner side surface of the slip is provided with a plurality of protruding structures, and the protruding structures surround the inner side surface of the slip and are arranged in rows and columns.
Optionally, the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector is separated from the female connector.
Optionally, one end of the drill rod body is provided with a trigger mechanism which can be compressed along with the connection of the drill rod body and the drill rod body, so as to trigger the sealing mechanism by means of the elasticity of the trigger mechanism.
Optionally, the oil duct connector comprises a first outer cylinder, and a first transverse partition plate is arranged in the middle of the first outer cylinder to divide the first outer cylinder into an oil duct connector upper cavity and an oil duct connector lower cavity which are arranged up and down; a first longitudinal partition plate is arranged in the oil duct connector upper cavity to divide the oil duct connector upper cavity into a connector oil passing channel a and a connector oil passing channel b which are arranged left and right; a first inner cylinder coaxial with the first outer cylinder is arranged in the lower cavity of the oil duct connector to divide the first outer cylinder into a first outer cavity and a first inner cavity which are annularly arranged; the first outer cavity and the first inner cavity are respectively communicated with the connector oil passage a and the connector oil passage b through the connector oil passage a and the connector oil passage b which are formed in the first transverse partition plate; the oil duct connecting seat comprises a second outer cylinder, and a second transverse partition plate is arranged in the middle of the second outer cylinder to divide the second outer cylinder into an oil duct connecting seat upper cavity and an oil duct connecting seat lower cavity which are arranged up and down; a second longitudinal partition plate is arranged in the upper cavity of the oil duct connecting seat so as to divide the upper cavity of the oil duct connecting seat into a connecting seat oil passing channel a and a connecting seat oil passing channel b which are arranged left and right; a second inner cylinder coaxial with the second outer cylinder is arranged in the lower cavity of the oil duct connecting seat so as to divide the second outer cylinder into a second outer cavity and a second inner cavity which are annularly arranged; the second outer cavity and the second inner cavity are respectively communicated with the connecting seat oil passage a and the connecting seat oil passage b through the connecting seat oil passage a and the connecting seat oil passage b which are arranged on the second transverse partition plate.
Optionally, an outer end face sealing ring is arranged in the second outer cavity, and an outer end face sealing inclined plane is arranged on the end face of the first outer barrel which is connected with the second outer cavity in an inserting manner; an inner end face sealing ring is arranged in the first inner cavity, and an inner end face sealing inclined plane is arranged on the end face of the second inner cylinder which is connected with the first inner cavity in an inserting mode.
Optionally, seal the mechanism and include and correspond the oil passageway matching and set up the sliding block of a plurality of discharge orifices, the sliding block towards one side that corresponds transverse partition plate be equipped with be located the sealed boss that the seal groove that corresponds on the transverse partition plate matches, the opposite side is equipped with reset spring, reset spring's the other end is equipped with the support filter plate that sets up a plurality of discharge orifices on it with the position of restriction reset spring.
Optionally, a sealing ring is arranged between the sealing boss and the sealing groove, and the sealing ring is sleeved at the middle part or the end part of the sealing boss.
Optionally, the trigger mechanism includes an opposing spring disposed in the first outer cavity or the second outer cavity, and the opposing spring pushes an ejector pin fixed to the sliding block to separate a sealing boss located on the sliding block from a sealing groove located on the corresponding transverse partition plate.
Optionally, a spring retainer is arranged between the support filter plate and the sliding block, and the spring retainer is fixed on the support filter plate or the sliding block.
The invention has the beneficial effects that:
1. by adopting the multi-channel design, when the drill rods are connected, the double oil channels are automatically opened, the cooling liquid is conveyed through the outer cooling water channel, the high-pressure oil is conveyed through the inner double oil channels, the driving oil and the cooling liquid of the hydraulic hammer are simultaneously conveyed, the hydraulic oil channels are automatically closed when the drill rods are broken off, and the service life of the hydraulic hammer is greatly prolonged.
2. By adopting the self-jacking type opening design, the double oil ducts are automatically opened when the drill rods are connected, and the effective implementation of the flowing circulation of hydraulic oil in the double oil ducts is ensured; after the drill rod is disassembled, the hydraulic oil seal is stored in the double oil ducts to prepare for oil path circulation when the drill rod is connected next time; the influence of the connection and disassembly processes of the drill rod on the circulation of the oil way is avoided, and the continuous operation of the circulation of the driving oil way is ensured, so that the drilling efficiency of the hydraulic hammer is greatly improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a self-closing multi-channel high-pressure drill pipe according to the present invention;
FIG. 2 is a schematic structural view of a sealing mechanism;
FIG. 3 is a schematic structural view of an oil passage connecting seat;
FIG. 4 is a schematic structural diagram of an oil passage connector;
FIG. 5 is a schematic structural view of the support assembly;
FIG. 6 is a schematic structural view of the inner support ring;
FIG. 7 is a schematic view of the slip construction.
Reference numerals: the device comprises an outer end face sealing ring 1, a return spring 2, an inner supporting ring 3, an expansion ring 4, a drill rod inner cylinder 5, a connecting assembly 6, a supporting filter plate 7, a sliding block 8, an opposite-vertex spring 9, an inner end face sealing ring 10, an oil passage connector 11, a cooling water channel 12, a drill rod outer cylinder 13, a slip 14, an oil passage connecting seat 15, a thimble 16, a sealing ring 17, an outer end face sealing inclined plane 111, a connector oil passing hole b112, a connector oil passing hole a113, a protrusion structure 141, a connecting hole 142, a second inner cavity 151, a second outer cavity 152, an inner end face sealing inclined plane 153, a thimble avoiding hole 154, a connecting seat oil passing hole a155, a connecting seat oil passing hole b156, an external thread 301, a taper surface 302, a drill rod second oil passage 501, a drill rod first oil passage 502 and a spring retainer 701.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 7, the self-closing multi-channel high-pressure drill pipe comprises a drill pipe body, wherein the drill pipe body comprises a drill pipe outer cylinder 13, a drill pipe inner cylinder 5 which is positioned in the drill pipe outer cylinder 13 and is coaxial with the drill pipe outer cylinder, and a connecting assembly 6 for connecting the drill pipe outer cylinder 13 and the drill pipe inner cylinder 5; the connecting assembly 6 is a three-leaf support and comprises a connecting sleeve sleeved on the inner drill rod barrel 5, three connecting pieces are uniformly distributed in the circumferential direction of the connecting sleeve, and the other end of each connecting piece is fixedly connected with the outer drill rod barrel 13; a space enclosed by the drill rod outer cylinder 13 and the drill rod inner cylinder 5 is a cooling water channel 12, the drill rod inner cylinder 5 is provided with a partition plate along the axial lead of the drill rod so as to divide the drill rod inner cylinder 5 into a drill rod first oil channel 502 and a drill rod second oil channel 501, and two ends of the drill rod body are respectively provided with an oil channel connector 11 and an oil channel connecting seat 15; the oil duct connector 11 is provided with an oil duct connector first oil duct and an oil duct connector second oil duct which are respectively communicated with the drill rod first oil duct 502 and the drill rod second oil duct 501; the oil duct connecting seat 15 is provided with an oil duct connecting seat first oil duct and an oil duct connecting seat second oil duct which are respectively communicated with the drill rod first oil duct 502 and the drill rod second oil duct 501, and the oil duct connecting seat first oil duct and the oil duct connecting seat second oil duct can be respectively connected with the oil duct connecting head first oil duct and the oil duct connecting head second oil duct to form a passage; and sealing mechanisms are arranged in the first oil duct of the oil duct connector, the second oil duct of the oil duct connector, the first oil duct of the oil duct connecting seat and the second oil duct of the oil duct connecting seat to seal corresponding oil ducts, and the sealing mechanisms are triggered to open the corresponding oil ducts when the connected drill rods are connected so as to communicate the corresponding oil ducts of the adjacent drill rods.
The drill rod is a double-layer drill rod and comprises two hydraulic oil channels positioned on an inner layer and a cooling water channel 12 positioned on an outer layer, wherein the two hydraulic oil channels are respectively used as an oil feeding channel and an oil return channel; the two hydraulic oil passages have a common center of rotation with the cooling water passage 12 to ensure that the external thread is rotationally connected without interference. When the drill rods are connected, the two hydraulic oil channels of the adjacent drill rods are communicated; after the drill rods are disassembled, the two hydraulic oil channels of the adjacent drill rods are closed. The hydraulic hammer realizes that the hydraulic hammer is driven by high-pressure oil, and the hydraulic oil has good lubricating and protecting effects on the piston of the hydraulic hammer, so the service life of the hydraulic hammer is greatly prolonged.
Optionally, the drill rod further comprises support components positioned at two ends of the drill rod body, wherein each support component comprises an inner support ring 3, an expansion ring 4 and a plurality of slips 14, the inner support ring 3 is sleeved on the drill rod inner cylinder 5 and is fixedly connected with the inner support ring, the expansion ring 4 is sleeved on the inner support ring 3, and the slips 14 are arranged in the circumferential direction of the expansion ring 4; the circumferential surface of one end of the inner support ring 3 is a taper surface 302 with taper, and the other end is provided with an external thread 301; one end of the expansion ring 4 is provided with an internal thread matched with the external thread 301 of the inner support ring, and the other end is an expansion end which is provided with a plurality of expansion gaps so as to expand along with the screwing of the expansion ring 4 and the inner support ring 3; slips 14 are arranged corresponding to the expansion end of the expansion ring 4 and are uniformly distributed at the expansion end of the expansion ring 4, and the slips 14 cling to the inner side wall of the drill pipe outer barrel 13 along with the expansion of the expansion ring 4.
Optionally, a limiting pin for limiting the position of the slip 14 is arranged between the slip 14 and the expansion ring 4, the inner side surface of the slip 14 is provided with a plurality of convex structures 141, and the convex structures 141 surround the inner side surface of the slip and are arranged in rows.
Optionally, one end of the drill rod body is provided with a trigger mechanism which can be compressed along with the connection of the drill rod body and the drill rod body so as to trigger the sealing mechanism by means of the elasticity of the trigger mechanism.
Optionally, the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector is separated from the female connector.
Optionally, the oil duct connector 11 includes a first outer cylinder, and a first transverse partition plate is disposed in the middle of the first outer cylinder to divide the first outer cylinder into an oil duct connector upper cavity and an oil duct connector lower cavity which are vertically arranged; a first longitudinal partition plate is arranged in the oil duct connector upper cavity to divide the oil duct connector upper cavity into a connector oil passing channel a and a connector oil passing channel b which are arranged left and right; a first inner cylinder coaxial with the first outer cylinder is arranged in the lower cavity of the oil duct connector to divide the first outer cylinder into a first outer cavity and a first inner cavity which are annularly arranged; the first outer cavity and the first inner cavity are respectively communicated with the connecting head oil passing passage a and the connecting head oil passing passage b through a connecting head oil passing hole a113 and a connecting head oil passing hole b112 formed in the first transverse partition plate.
Optionally, the oil passage connecting seat 15 includes a second outer cylinder, and a second transverse partition plate is disposed in the middle of the second outer cylinder to divide the second outer cylinder into an upper oil passage connecting seat cavity and a lower oil passage connecting seat cavity which are vertically arranged; a second longitudinal partition plate is arranged in the upper cavity of the oil duct connecting seat so as to divide the upper cavity of the oil duct connecting seat into a connecting seat oil passing channel a and a connecting seat oil passing channel b which are arranged left and right; a second inner cylinder coaxial with the second outer cylinder is arranged in the lower cavity of the oil passage connecting seat so as to divide the second outer cylinder into a second outer cavity 152 and a second inner cavity 151 which are annularly arranged; the second outer cavity 152 and the second inner cavity 151 are respectively communicated with the coupling seat oil passage a and the coupling seat oil passage b through a coupling seat oil passage a155 and a coupling seat oil passage b156 provided on the second transverse partition.
Optionally, the sealing mechanism comprises a sliding block 8 which is matched with the corresponding oil passing channel and provided with a plurality of flow passing holes, a sealing boss matched with a sealing groove on the corresponding transverse partition plate is arranged on one side, facing the corresponding transverse partition plate, of the sliding block 8, a return spring 2 is arranged on the other side of the sliding block, and the other end of the return spring 2 is provided with a support filter plate 7 provided with a plurality of flow passing holes to limit the position of the return spring 2. The support filter plate 7 is fixedly connected with the first outer cylinder or the second outer cylinder through a pin, one end of the pin is positioned in a fixing hole formed in the circumferential direction of the support filter plate 7, and the other end of the pin is positioned in a positioning hole formed in the first outer cylinder or the second outer cylinder.
Optionally, an outer end face sealing ring 1 is arranged in the second outer cavity 152, so that the second outer cavity 152 and the first outer cavity can be connected in a sealing manner; an inner end face sealing ring 10 is arranged in the first inner cavity, so that the first inner cavity and the second inner cavity 151 can be in sealing connection, and further the oil duct connecting seat 15 and the oil duct connecting head 11 are in sealing connection.
Optionally, the first outer barrel is provided with an outer end face sealing bevel 111 to increase the contact area with the outer end face sealing ring 1; the second inner cylinder is provided with an inner end face sealing inclined surface 153 to increase the contact area with the inner end face sealing ring 10 and improve the sealing reliability.
Optionally, a sealing ring 17 is arranged between the sealing boss and the sealing groove, and the sealing ring 17 is an O-shaped sealing ring; the sealing ring 17 is sleeved on the sealing boss and can be positioned at the end part or the middle part of the sealing boss, and the middle part is optimized to reduce the problem that the sealing ring 17 is not tightly sealed due to insufficient elasticity of the return spring 2.
Optionally, there are two seal rings 17, and a spacer sleeve is disposed on the seal boss to improve the stability of the seal.
Optionally, a spring holder 701 is provided between the support filter plate 7 and the slide block 8, and the spring holder 701 is fixed to the support filter plate 7 or the slide block 8.
Optionally, the triggering mechanism includes an opposing spring 9 disposed in the first outer cavity or the second outer cavity 152, and the opposing spring 9 pushes the ejector pin 16 fixed to the sliding block 8 to separate the sealing boss on the sliding block 8 from the sealing groove on the corresponding transverse partition, so as to open the oil passing channel. Ejector pin avoiding holes 154 are formed in the second transverse partition plate, and ejector pin avoiding holes are also formed in the first transverse partition plate.
The self-jacking type opening design is adopted, the double oil ducts are automatically opened when the drill rods are connected, and the effective implementation of the flowing circulation of hydraulic oil in the double oil ducts is guaranteed; after the drill rod is disassembled, the hydraulic oil seal is stored in the double oil ducts to prepare for oil path circulation when the drill rod is connected next time; the influence of the connection and disassembly processes of the drill rod on the circulation of the oil way is avoided, and the continuous operation of the circulation of the driving oil way is ensured, so that the drilling efficiency of the hydraulic hammer is greatly improved.
The drill rod adopts a multi-channel design, the double oil channels are automatically opened when the drill rod is connected, the cooling liquid is conveyed through the outer-layer cooling water channel 12, the high-pressure oil is conveyed through the inner-layer double oil channels, the simultaneous conveying of the driving oil and the cooling liquid of the hydraulic hammer is realized, the automatic closing of the hydraulic oil channels is realized when the drill rod is broken out, and the service life of the hydraulic hammer is greatly prolonged.
Examples
A self-closing multi-channel high-pressure drill rod is a double-layer drill rod, a space enclosed by an outer drill rod cylinder 13 and an inner drill rod cylinder 5 is a cooling water channel 12, and the inner drill rod cylinder 5 is provided with a partition board along the axial lead of the drill rod so as to divide the inner drill rod cylinder 5 into two hydraulic channels, namely a first drill rod oil channel 502 and a second drill rod oil channel 501; drill rod connection structure adopts the sealed design of opposite vertex formula, including oil duct connector 11 and the oil duct connecting seat 15 that sets up respectively in pin joint and box, oil duct connector 11 and oil duct connecting seat 15 pass through supporting component and are connected with pin joint and box respectively, and oil duct connector 11 can insert inside oil duct connecting seat 15, through opposite vertex spring 9 promotion sliding block 8, realizes the separation of sealed boss and seal groove, realizes UNICOM and the shutoff of oil duct. Specifically, the method comprises the following steps:
the oil duct connector 11 and the oil duct connecting seat 15 are concentric with the drill rod, and the drill rod can be connected and disconnected to drive the oil duct connector 11 and the oil duct connecting seat 15 to be connected and disconnected. The outer ends of the oil duct connector 11 and the oil duct connecting seat 15 are both in circular design, and the inner ends of the oil duct connector and the oil duct connecting seat are semicircular sealing cavities.
The supporting component consists of a slip 14, an inner supporting ring 3 and an expansion ring 4, wherein half of the inner supporting ring 3 is provided with an external thread 301, and the other half is provided with a taper surface 302; half 4 of expansion ring is three lamella opening circular structure, and half is equipped with the internal thread, closes soon through inner support ring 3 and 4 screw threads of expansion ring, makes the taper face 302 extrusion expansion ring 4's of inner support ring 3 three lamella opening circular structure outwards expand and realize realizing the connection of inner support ring 3 and expansion ring 4, and expansion ring 4 transmits power for slips 14, realizes supporting mechanism's fixed.
The center of the slip 14 is provided with a connecting hole 142, the outer side of the three-segment opening arc of the expansion ring 4 is provided with a protruding cylinder which is used as a limiting pin, and the slip 14 is fixed with the relative position of the expansion ring 4 by matching the protruding cylinder with the connecting hole 142 of the slip 14. The inner ring of the slip 14 is provided with a plurality of slip teeth which surround the inner side surface of the slip 14 and are arranged in rows, so that the slip teeth and the expansion ring 4 have great friction force under the action of expansion force.
The sealing mechanism mainly comprises an ejector pin 16, a sliding block 8, a reset spring 2 and a support filter plate 7, when a drill rod is connected, a thrust force is applied to the sliding block 8 through the ejector pin 16 by the opposite spring 9, the sliding block 8 moves for a certain distance, the sealing boss leaves a sealing groove, the upper oil duct and the lower oil duct are communicated, after the drill rod is broken off, the elasticity of the opposite spring 9 to the ejector pin 16 disappears, and the sliding block 8 is pushed into the sealing groove under the action of the reset spring 2, so that the upper oil duct and the lower oil duct are automatically closed.
One end of the oil duct connector 11 is provided with two concentric cylinders, the other end of the oil duct connector is provided with two semicircular cavities, and the two circular ring-shaped flow channels are communicated with the corresponding cavities at the other end.
Oil duct connecting seat 15, one end is equipped with two concentric drums, and the other end is equipped with two semi-circular cavities, and two ring shape runners and the corresponding cavity UNICOM of the other end.
The sliding block 8 is provided with thimble fixing holes at two sides, a sealing boss is arranged in the middle, two sealing rings 17 are arranged on the sealing boss, and a plurality of sliding block overflowing holes are arranged at the periphery of the sealing boss.
The filter plate 7 is supported, a spring retainer 701 is arranged in the middle of the filter plate, the spring retainer 701 can be a cylinder or a sleeve, and a plurality of filter plate supporting overflowing holes are formed in the periphery of the spring retainer 701.
The device is connected: in the process that the oil duct connector 11 is inserted into the oil duct connecting seat 15, the distance between the oil duct connector 11 and the oil duct connecting seat 15 is reduced, the opposite-vertex spring 9 is compressed and deformed, ejector pins 16 are arranged at two ends of the opposite-vertex spring 9, the opposite-vertex spring 9 applies elastic force to the ejector pins 16, the ejector pins 16 push the sliding block 8 to move, the opposite-vertex spring 9 applies thrust to the sliding block 8 through the ejector pins 16, the sliding block 8 moves for a certain distance, the sealing boss leaves the sealing groove, and automatic communication of the upper oil duct and the lower oil duct is achieved.
Separating the device: in the process that the oil duct connector 11 withdraws from the oil duct connecting seat 15, the distance between the oil duct connector 11 and the oil duct connecting seat 15 is gradually increased, so that the elastic force of the opposite spring 9 on the sliding block 8 is smaller than the reset spring 2, the sliding block 8 moves towards the transverse partition plate, and then the sealing boss is pushed into the sealing groove, and the automatic closing of the upper oil duct and the lower oil duct is realized.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A self-closing multichannel high-pressure drill pipe is characterized in that: the drill rod comprises a drill rod body, wherein the drill rod body comprises a drill rod outer barrel and a drill rod inner barrel which is fixed on the inner side of the drill rod outer barrel and coaxially arranged with the drill rod outer barrel, a space enclosed by the drill rod outer barrel and the drill rod inner barrel is a cooling water channel, the drill rod inner barrel is provided with a partition board along the axial lead of a drill rod so as to divide the drill rod inner barrel into a drill rod first oil duct and a drill rod second oil duct, and two ends of the drill rod body are respectively provided with an oil duct connector and an oil duct connecting seat; the oil duct connector is provided with an oil duct connector first oil duct and an oil duct connector second oil duct which are respectively communicated with the drill rod first oil duct and the drill rod second oil duct; the oil duct connecting seat is provided with an oil duct connecting seat first oil duct and an oil duct connecting seat second oil duct which are respectively communicated with the drill rod first oil duct and the drill rod second oil duct, and the oil duct connecting seat first oil duct and the oil duct connecting seat second oil duct can be respectively connected with the oil duct connector first oil duct and the oil duct connector second oil duct to form a passage; and sealing mechanisms are arranged in the first oil duct of the oil duct connector, the second oil duct of the oil duct connector, the first oil duct of the oil duct connecting seat and the second oil duct of the oil duct connecting seat to seal corresponding oil ducts, and the sealing mechanisms are triggered to open the corresponding oil ducts when the connected drill rods are connected so as to communicate the corresponding oil ducts of the adjacent drill rods.
2. The self-closing multi-channel high-pressure drill pipe as recited in claim 1, wherein: the drill rod comprises a drill rod body and is characterized by also comprising support components positioned at two ends of the drill rod body, wherein each support component comprises an inner support ring, an expansion ring and a plurality of slips, the inner support ring is sleeved on the inner drill rod cylinder and is fixedly connected with the inner drill rod cylinder, the expansion ring is sleeved on the inner support ring, and the slips are arranged in the circumferential direction of the expansion ring; one end of the inner support ring is provided with taper in the circumferential direction, and the other end of the inner support ring is provided with external threads; one end of the expansion ring is provided with an internal thread matched with the external thread of the inner support ring, and the other end is provided with a plurality of expansion joints for the expansion end to expand along with the rotation of the expansion ring and the inner support ring; the slips are arranged corresponding to the expansion ends of the expansion rings and are uniformly distributed at the expansion ends of the expansion rings.
3. The self-closing multi-channel high-pressure drill pipe as recited in claim 2, wherein: be equipped with the spacer pin that is used for restricting the slips position between slips and the expansion ring, the slips medial surface has a plurality of protruding structures, and protruding structure encircles the slips medial surface and arranges for arranging in rows.
4. The self-closing multi-channel high-pressure drill pipe as recited in claim 1, wherein: the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector and the female connector are separated.
5. The self-closing multi-channel high-pressure drill pipe as recited in claim 1, wherein: one end of the drill rod body is provided with a triggering mechanism which can be compressed along with the connection of the drill rod body and the drill rod body so as to trigger the sealing mechanism by means of the elasticity of the triggering mechanism.
6. The self-closing multi-channel high-pressure drill pipe as recited in claim 5, wherein: the oil duct connector comprises a first outer barrel, and a first transverse partition plate is arranged in the middle of the first outer barrel to divide the first outer barrel into an oil duct connector upper cavity and an oil duct connector lower cavity which are vertically arranged; a first longitudinal partition plate is arranged in the oil duct connector upper cavity to divide the oil duct connector upper cavity into a connector oil passing channel a and a connector oil passing channel b which are arranged left and right; a first inner cylinder coaxial with the first outer cylinder is arranged in the lower cavity of the oil duct connector to divide the first outer cylinder into a first outer cavity and a first inner cavity which are annularly arranged; the first outer cavity and the first inner cavity are respectively communicated with the connector oil passage a and the connector oil passage b through the connector oil passage a and the connector oil passage b which are formed in the first transverse partition plate; the oil duct connecting seat comprises a second outer cylinder, and a second transverse partition plate is arranged in the middle of the second outer cylinder to divide the second outer cylinder into an oil duct connecting seat upper cavity and an oil duct connecting seat lower cavity which are arranged up and down; a second longitudinal partition plate is arranged in the upper cavity of the oil duct connecting seat so as to divide the upper cavity of the oil duct connecting seat into a connecting seat oil passing channel a and a connecting seat oil passing channel b which are arranged left and right; a second inner cylinder coaxial with the second outer cylinder is arranged in the lower cavity of the oil duct connecting seat so as to divide the second outer cylinder into a second outer cavity and a second inner cavity which are annularly arranged; the second outer cavity and the second inner cavity are respectively communicated with the connecting seat oil passage a and the connecting seat oil passage b through the connecting seat oil passage a and the connecting seat oil passage b which are arranged on the second transverse partition plate.
7. The self-closing multi-channel high-pressure drill pipe as claimed in claim 6, wherein: an outer end face sealing ring is arranged in the second outer cavity, and an outer end face sealing inclined plane is arranged on the end face of the first outer barrel in plug-in connection with the second outer cavity; an inner end face sealing ring is arranged in the first inner cavity, and an inner end face sealing inclined plane is arranged on the end face of the second inner cylinder which is connected with the first inner cavity in an inserting mode.
8. The self-closing multi-channel high-pressure drill pipe as claimed in claim 6, wherein: the mechanism of sealing includes and corresponds the oil passageway matching and set up the sliding block of a plurality of discharge orifices, and the sliding block is equipped with towards one side that corresponds transverse partition plate and is located the sealed boss that matches of seal groove that corresponds on the transverse partition plate, and the opposite side is equipped with reset spring, and reset spring's the other end is equipped with the support filter plate that sets up a plurality of discharge orifices on it with the position of restriction reset spring.
9. The self-closing multi-channel high-pressure drill pipe as recited in claim 8, wherein: and a sealing ring is arranged between the sealing boss and the sealing groove, and the sealing ring is sleeved at the middle part or the end part of the sealing boss.
10. The self-closing multi-channel high-pressure drill pipe as recited in claim 8, wherein: the trigger mechanism comprises an opposite-pushing spring arranged in the first outer cavity or the second outer cavity, and the opposite-pushing spring enables a sealing boss on the sliding block to be separated from a sealing groove on the corresponding transverse partition plate by pushing a thimble fixed on the sliding block.
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| CN202110920493.0A CN113445902B (en) | 2021-08-11 | 2021-08-11 | Self-closing multichannel high-pressure drill rod |
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| CN202110920493.0A CN113445902B (en) | 2021-08-11 | 2021-08-11 | Self-closing multichannel high-pressure drill rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445903A (en) * | 2021-08-11 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Self-closing double-oil-passage drill rod connecting structure |
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| CN113445902B (en) | 2023-09-19 |
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