CN113445902B - Self-closing multichannel high-pressure drill rod - Google Patents
Self-closing multichannel high-pressure drill rod Download PDFInfo
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- CN113445902B CN113445902B CN202110920493.0A CN202110920493A CN113445902B CN 113445902 B CN113445902 B CN 113445902B CN 202110920493 A CN202110920493 A CN 202110920493A CN 113445902 B CN113445902 B CN 113445902B
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- 238000007789 sealing Methods 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 230000001960 triggered effect Effects 0.000 claims abstract 2
- 238000005192 partition Methods 0.000 claims description 27
- 239000000498 cooling water Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 195
- 239000010720 hydraulic oil Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- 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 application relates to a self-closing type multichannel 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 is 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 the sealing mechanisms are triggered to open the corresponding oil duct when the connected drill rods are connected so that the corresponding oil ducts of the adjacent drill rods are communicated. The hydraulic hammer has the advantages that the service life of the hydraulic hammer is prolonged, the influence of the connection and disassembly processes of the drill rod on the oil circuit circulation is avoided, and the drilling efficiency is improved.
Description
Technical Field
The application belongs to the technical field of drill rods, and relates to a self-closing multi-channel high-pressure drill rod.
Background
The hydraulic hammer drilling technology for coal mine tunnel is characterized in that cooling water is used as a working medium to drive a hammer plunger in the hydraulic hammer to reciprocate at high frequency, impact force is applied to a drill bit to break rock, and the hydraulic hammer is considered to be the most suitable process for hard rock drilling at present due to higher drilling efficiency and better hole forming quality. However, in the coal mine drilling construction, the cooling water adopts underground water, the underground water contains corrosive substances and tiny particles, and the piston of the hydraulic hammer is very severely worn due to long-term impact, corrosion and abrasive particle environment of the underground water, so that the service life is very short, the drilling efficiency is seriously affected, and a great amount of economic loss is caused.
Disclosure of Invention
Therefore, the application aims to provide a self-closing multi-channel high-pressure drill rod so as to prolong the service life of a hydraulic hammer.
In order to achieve the above purpose, the present application provides the following technical solutions:
the 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 is coaxially arranged with the drill rod outer cylinder, a space surrounded by the drill rod outer cylinder and the drill rod inner cylinder is a cooling water channel, a partition plate is arranged on the drill rod inner cylinder along the axial lead of the drill rod so as to divide the drill rod inner cylinder into a first drill rod oil channel and a second drill rod oil channel, and two ends of the drill rod body are respectively provided with an oil channel connector and an oil channel connector; the oil duct connecting head is provided with an oil duct connecting head first oil duct and an oil duct connecting head 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 connecting seat first oil duct and the oil duct connecting seat second oil duct to form a passage; the first oil duct of oil duct connector, the second oil duct of oil duct connector, all be equipped with in oil duct connecting seat first oil duct and the second oil duct of oil duct connecting seat and seal the mechanism in order to seal the corresponding oil duct, and trigger when connecting the drilling rod and seal the mechanism and open the corresponding oil duct in order to make the corresponding oil duct intercommunication of adjacent drilling rod.
Optionally, the drill rod further comprises supporting components at two ends of the drill rod body, wherein the supporting components comprise an inner supporting ring sleeved on the inner cylinder of the drill rod and fixedly connected with the inner supporting ring, an expansion ring sleeved on the inner supporting ring and a plurality of slips arranged on the circumference of the expansion ring; one end of the inner support ring is provided with a taper in the circumferential direction, and the other end is provided with an external thread; 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 of the expansion ring is provided with a plurality of expansion gaps for expanding the expansion end along with the screwing of the expansion ring and the inner support ring; the slips are arranged corresponding to the expansion end of the expansion ring and are uniformly distributed at the expansion end of the expansion ring.
Optionally, a limiting pin for limiting the position of the slips is arranged between the slips and the expansion ring, the inner side surface of the slips is provided with a plurality of protruding structures, and the protruding structures encircle the inner side surface of the slips and are arranged in rows.
Optionally, the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector and the female connector are separated.
Optionally, one end of the drill rod body is provided with a triggering mechanism capable of being compressed along with the connection of the two drill rods so as to trigger the sealing mechanism by means of elasticity of the triggering 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 upper oil duct connector cavity and a lower oil duct connector cavity which are arranged up and down; a first longitudinal baffle is arranged in the upper cavity of the oil duct connector to divide the upper cavity of the oil duct connector into a connector oil passage a and a connector oil passage b which are arranged left and right; the lower cavity of the oil duct connector is internally provided with a first inner cylinder coaxial with the first outer cylinder so as 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 a connector oil passage a and a connector oil passage b which are arranged on 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 upper oil duct connecting seat cavity and a lower oil duct connecting seat cavity which are arranged up and down; a second longitudinal baffle plate is arranged in the lower cavity of the oil duct connecting seat so as to divide the lower cavity of the oil duct connecting seat into a connecting seat passing oil duct a and a connecting seat passing oil duct b which are arranged left and right; the upper cavity of the oil duct connecting seat is internally provided with a second inner cylinder which is coaxial with the second outer cylinder 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 a connecting seat oil passing hole a and a connecting seat oil passing hole b which are formed in 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 cylinder which is 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 in plug-in connection with the first inner cavity.
Optionally, the sealing mechanism comprises a sliding block matched with the corresponding oil passage and provided with a plurality of overflow holes, one side of the sliding block, facing the corresponding transverse partition plate, of the sliding block is provided with a sealing boss matched with a sealing groove positioned on the corresponding transverse partition plate, the other side of the sliding block is provided with a return spring, and the other end of the return spring is provided with a supporting filter plate provided with a plurality of overflow holes so as to limit the position of the return 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 triggering mechanism comprises a centering spring arranged in the first outer cavity or the second outer cavity, and the centering spring enables the sealing boss positioned on the sliding block to be separated from the sealing groove positioned on the corresponding transverse partition plate by pushing the thimble fixed on the sliding block.
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 application has the beneficial effects that:
1. adopt multichannel design, two oil ducts are automatic to be opened when the drilling rod is connected, carry the coolant liquid through outer cooling water passageway, and the high-pressure oil is carried to the two oil ducts of inlayer, has realized the simultaneous transportation of hydraulic hammer drive oil and coolant liquid to when the drilling rod is broken out, realized the self-closing of hydraulic oil duct, greatly improved the life of hydraulic hammer.
2. The self-jacking type opening design is adopted, and the double oil channels are automatically opened when the drill rods are connected, so that the effective implementation of the flow circulation of hydraulic oil in the double oil channels is ensured; after the drill rod is disassembled, the hydraulic oil seal is stored in the double oil channels, so as to prepare for oil circuit circulation in the next drill rod connection; the influence of the drill rod connection and disassembly process on the oil circuit circulation is avoided, and the continuous operation of the driving oil circuit circulation is ensured, so that the drilling efficiency of the hydraulic hammer is greatly improved.
Additional advantages, objects, and features of the application 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 application. The objects and other advantages of the application may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a self-closing multi-channel high pressure drill rod according to the present application;
FIG. 2 is a schematic structural view of a sealing mechanism;
FIG. 3 is a schematic view of the oil passage connection base;
fig. 4 is a schematic structural view of an oil duct joint;
FIG. 5 is a schematic view of a structure of a support assembly;
FIG. 6 is a schematic view of the structure of the inner support ring;
fig. 7 is a schematic structural view of a slip.
Reference numerals: the outer end face sealing ring 1, the return spring 2, the inner support ring 3, the expansion ring 4, the drill rod inner cylinder 5, the connecting component 6, the support filter plate 7, the sliding block 8, the centering spring 9, the inner end face sealing ring 10, the oil duct connector 11, the cooling water channel 12, the drill rod outer cylinder 13, the slips 14, the oil duct connecting seat 15, the thimble 16, the sealing ring 17, the outer end face sealing inclined plane 111, the connector oil passing hole b112, the connector oil passing hole a113, the protruding structure 141, the connecting hole 142, the second inner cavity 151, the second outer cavity 152, the inner end face sealing inclined plane 153, the thimble avoiding hole 154, the connecting seat oil passing hole a155, the connecting seat oil passing hole b156, the external thread 301, the taper face 302, the drill rod second oil duct 501, the drill rod first oil duct 502 and the spring retainer 701.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present application by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the application; for the purpose of better illustrating embodiments of the application, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated 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 numbers in the drawings of embodiments of the application correspond to the same or similar components; in the description of the present application, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present application, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-7, 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 13, a drill rod inner cylinder 5 which is positioned in the drill rod outer cylinder 13 and is coaxially arranged with the drill rod outer cylinder, and a connecting assembly 6 for connecting the drill rod outer cylinder 13 and the drill rod inner cylinder 5; the connecting component 6 is a three-page support and comprises a connecting sleeve sleeved on the drill rod inner cylinder 5, three connecting sheets are uniformly distributed in the circumferential direction of the connecting sleeve, and the other end of each connecting sheet is fixedly connected with the drill rod outer cylinder 13; the space surrounded 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 to divide the drill rod inner cylinder 5 into a drill rod first oil duct 502 and a drill rod second oil duct 501, and two ends of the drill rod body are respectively provided with an oil duct connector 11 and an oil duct 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 an oil duct connector first oil duct and an oil duct connector second oil duct to form a passage; the first oil duct of oil duct connector, the second oil duct of oil duct connector, all be equipped with in oil duct connecting seat first oil duct and the second oil duct of oil duct connecting seat and seal the mechanism in order to seal the corresponding oil duct, and trigger when connecting the drilling rod and seal the mechanism and open the corresponding oil duct in order to make the corresponding oil duct intercommunication of adjacent drilling rod.
The drill rod is a double-layer drill rod and comprises two hydraulic oil channels positioned on an inner layer and one 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 channels and the cooling water channel 12 have a common rotation center to ensure that the external threads do not interfere when in rotational connection. When the drill rods are connected, two hydraulic oil channels of adjacent drill rods are communicated; after the drill rods are disassembled, two hydraulic oil channels of adjacent drill rods are closed. The application realizes that the hydraulic hammer is driven by high-pressure oil, and the service life of the hydraulic hammer is greatly prolonged because the hydraulic oil has good lubricating and protecting effects on the piston of the hydraulic hammer.
Optionally, the drill rod further comprises supporting components at two ends of the drill rod body, wherein the supporting components comprise an inner supporting ring 3 sleeved on the inner cylinder 5 of the drill rod and fixedly connected with the inner supporting ring, an expansion ring 4 sleeved on the inner supporting ring 3, and a plurality of slips 14 arranged in the circumferential direction of the expansion ring 4; one end of the inner support ring 3 has a taper surface 302 with a taper on the circumferential surface, 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 provided with a plurality of expansion gaps for the expansion end so that the end expands along with the screwing of the expansion ring 4 and the inner support ring 3; the 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 are clung to the inner side wall of the drill rod outer cylinder 13 along with the expansion of the expansion ring 4.
Optionally, a limiting pin for limiting the position of the slips 14 is arranged between the slips 14 and the expansion ring 4, and the inner side surface of the slips 14 is provided with a plurality of protruding structures 141, and the protruding structures 141 encircle the inner side surface of the slips and are arranged in rows.
Optionally, one end of the drill rod body is provided with a trigger mechanism which can be compressed as the two drill rods are connected to trigger the sealing mechanism by means of the elasticity thereof.
Optionally, the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector and the female connector are separated.
Optionally, the oil duct connector 11 includes 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 upper oil duct connector cavity and a lower oil duct connector cavity which are arranged up and down; a first longitudinal baffle is arranged in the upper cavity of the oil duct connector to divide the upper cavity of the oil duct connector into a connector oil passage a and a connector oil passage b which are arranged left and right; the lower cavity of the oil duct connector is internally provided with a first inner cylinder coaxial with the first outer cylinder so as 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 a connector oil passing hole a113 and a connector oil passing hole b112 which are formed in the first transverse partition plate.
Optionally, the oil duct connecting seat 15 includes 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 upper cavity of the oil duct connecting seat and a lower cavity of the oil duct connecting seat, which are arranged up and down; a second longitudinal baffle plate is arranged in the lower cavity of the oil duct connecting seat so as to divide the lower cavity of the oil duct connecting seat into a connecting seat passing oil duct a and a connecting seat passing oil duct b which are arranged left and right; a second inner cylinder coaxial with the second outer cylinder is arranged in the upper cavity of the oil duct 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 chamber 152 and the second inner chamber 151 are respectively communicated with the connecting seat oil passage a and the connecting seat oil passage b through a connecting seat oil passing hole a155 and a connecting seat oil passing hole b156 which are formed in the second transverse partition plate.
Optionally, the sealing mechanism comprises a sliding block 8 matched with the corresponding oil passage and provided with a plurality of overflow holes, one side of the sliding block 8 facing the corresponding transverse partition plate is provided with a sealing boss matched with a sealing groove positioned on the corresponding transverse partition plate, the other side of the sliding block is provided with a return spring 2, and the other end of the return spring 2 is provided with a support filter plate 7 provided with a plurality of overflow holes so as 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 way; the first inner cavity is internally provided with an inner end face sealing ring 10 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 cylinder is provided with an outer end face sealing slope 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 bevel 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 preferable to reduce the problem that the sealing ring 17 is not tightly sealed due to insufficient elasticity of the reset spring 2.
Optionally, two sealing rings 17 are arranged and sleeved on the sealing boss at intervals to improve the sealing stability.
Optionally, a spring holder 701 is provided between the support filter plate 7 and the slider 8, and the spring holder 701 is fixed to the support filter plate 7 or the slider 8.
Optionally, the triggering mechanism includes a centering spring 9 disposed in the first outer cavity or the second outer cavity 152, where the centering spring 9 pushes the ejector pin 16 fixed on the sliding block 8 to disengage the sealing boss on the sliding block 8 from the sealing groove on the corresponding transverse partition, so as to open the oil duct. The second transverse partition plate is provided with a thimble avoiding hole 154, and the first transverse partition plate is also provided with a thimble avoiding hole.
The application adopts a self-jacking type opening design, and the double oil channels are automatically opened when the drill rods are connected, so that the effective implementation of the flow circulation of hydraulic oil in the double oil channels is ensured; after the drill rod is disassembled, the hydraulic oil seal is stored in the double oil channels, so as to prepare for oil circuit circulation in the next drill rod connection; the influence of the drill rod connection and disassembly process on the oil circuit circulation is avoided, and the continuous operation of the driving oil circuit circulation is ensured, so that the drilling efficiency of the hydraulic hammer is greatly improved.
According to the hydraulic hammer, the drill rod adopts a multi-channel design, the double oil channels are automatically opened when the drill rod is connected, cooling liquid is conveyed through the outer cooling water channel 12, high-pressure oil is conveyed through the inner double oil channels, simultaneous conveying of hydraulic hammer driving oil and cooling liquid is achieved, automatic closing of the hydraulic oil channels is achieved when the drill rod is tripped, and the service life of the hydraulic hammer is greatly prolonged.
Examples
The self-closing multi-channel high-pressure drill rod is a double-layer drill rod, a space surrounded by the drill rod outer cylinder 13 and the drill rod inner cylinder 5 is a cooling water channel 12, and the drill rod inner cylinder 5 is provided with a partition plate along the axial lead of the drill rod to divide the drill rod inner cylinder 5 into two hydraulic channels, namely a drill rod first oil channel 502 and a drill rod second oil channel 501; the drill rod connection structure adopts a butt-type sealing design, and comprises an oil duct connector 11 and an oil duct connection seat 15 which are respectively arranged in a male connector and a female connector, wherein the oil duct connector 11 and the oil duct connection seat 15 are respectively connected with the male connector and the female connector through a supporting component, the oil duct connector 11 can be inserted into the oil duct connection seat 15, a sliding block 8 is pushed by a butt spring 9, separation of a sealing boss and a sealing groove is realized, and communication and blocking of an oil duct are realized. Specifically:
the oil duct connector 11 and the oil duct connecting seat 15 are concentric with the drill rod, and the drill rod connection and the shackle can drive the oil duct connector 11 and the oil duct connecting seat 15 to be inserted and separated. The outer ends of the oil duct connector 11 and the oil duct connecting seat 15 are all in round design, and the inner ends of the oil duct connector and the oil duct connecting seat are semicircular sealing cavities.
The support assembly consists of slips 14, an inner support ring 3 and an expansion ring 4, wherein half of the inner support ring 3 is provided with external threads 301, and the other half is provided with a taper surface 302; half of the expansion ring 4 is of a three-valve opening arc structure, half of the expansion ring is provided with internal threads, the internal threads are screwed with the expansion ring 4 through the internal support ring 3, the taper surface 302 of the internal support ring 3 extrudes the three-valve opening arc structure of the expansion ring 4 to expand outwards, connection of the internal support ring 3 and the expansion ring 4 is achieved, the expansion ring 4 transmits force to the slips 14, and fixing of a supporting mechanism is achieved.
The connecting hole 142 is formed in the center of the slip 14, the protruding cylinder is arranged on the outer side of the circular arc of the three-petal opening of the expansion ring 4 and used as a limiting pin, and the protruding cylinder is matched with the connecting hole 142 of the slip 14 to ensure the fixing of the relative positions of the slip 14 and the expansion ring 4. The inner ring of the slips 14 is provided with a plurality of slip teeth which encircle the inner side surface of the slips 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 a thimble 16, a sliding block 8, a reset spring 2 and a support filter plate 7, when a drill rod is connected, a thrust is applied to the sliding block 8 by the thimble 16, the sliding block 8 moves a certain distance, a sealing boss leaves a sealing groove, an upper oil duct and a lower oil duct are communicated, after the drill rod is tripped, the elasticity of the thimble 16 by the centering spring 9 disappears, and the sliding block 8 is pushed into the sealing groove due to the effect of the reset spring 2, so that the upper oil duct and the lower oil duct are automatically closed.
The oil duct connector 11, one end is equipped with two concentric drums, and the other end is equipped with two semi-circular cavities, and two ring runner and the corresponding cavity UNICOM of other end.
The 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 runner and the corresponding cavity UNICOM of 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 overflow holes are arranged on the periphery of the sealing boss.
The filter plate 7 is supported, a spring retainer 701 is arranged in the middle, the spring retainer 701 can be a cylinder or a sleeve, and a plurality of filter plate supporting flow holes are arranged on the periphery of the spring retainer 701.
The device is connected with: 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 centering springs 9 are compressively deformed, the ejector pins 16 are arranged at two ends of the centering springs 9, the elastic force is applied to the ejector pins 16 by the centering springs 9, the ejector pins 16 push the sliding block 8 to move, the centering springs 9 apply 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 the automatic communication of the upper oil duct and the lower oil duct is realized.
And (3) separating the device: in the process that the oil duct connector 11 exits 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 to the sliding block 8 is smaller than that of the return spring 2, the sliding block 8 moves towards the transverse partition plate, 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, it is noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present application, which is intended to be covered by the claims of the present application.
Claims (5)
1. A self-closing multichannel high-pressure drill rod is characterized in that: the 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 is coaxially arranged with the drill rod outer cylinder, a space surrounded 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 baffle plate along the axial lead of a drill rod so as to divide the drill rod inner cylinder into a first drill rod oil channel and a second drill rod oil channel, and two ends of the drill rod body are respectively provided with an oil channel connector and an oil channel connector; the oil duct connecting head is provided with an oil duct connecting head first oil duct and an oil duct connecting head 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 connecting seat first oil duct and the oil duct connecting seat second oil duct to form a passage; sealing mechanisms are arranged in the first oil passage of the oil passage connector, the second oil passage of the oil passage connector, the first oil passage of the oil passage connecting seat and the second oil passage of the oil passage connecting seat to seal the corresponding oil passages, and the sealing mechanisms are triggered to open the corresponding oil passages when connecting the adjacent drill rods so as to enable the corresponding oil passages of the adjacent drill rods to be communicated;
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 upper oil duct connector cavity and a lower oil duct connector cavity which are arranged up and down; a first longitudinal baffle is arranged in the upper cavity of the oil duct connector to divide the upper cavity of the oil duct connector into a connector oil passage a and a connector oil passage b which are arranged left and right; the lower cavity of the oil duct connector is internally provided with a first inner cylinder coaxial with the first outer cylinder so as 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 a connector oil passage a and a connector oil passage b which are arranged on 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 upper oil duct connecting seat cavity and a lower oil duct connecting seat cavity which are arranged up and down; a second longitudinal baffle plate is arranged in the lower cavity of the oil duct connecting seat so as to divide the lower cavity of the oil duct connecting seat into a connecting seat passing oil duct a and a connecting seat passing oil duct b which are arranged left and right; the upper cavity of the oil duct connecting seat is internally provided with a second inner cylinder which is coaxial with the second outer cylinder 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 a connecting seat oil passing hole a and a connecting seat oil passing hole b which are formed in the second transverse partition plate;
the sealing mechanism is an elastic telescopic mechanism and automatically resets after the male connector and the female connector are separated; the sealing mechanism comprises a sliding block which is matched with the corresponding oil passage and provided with a plurality of overflow holes, one side of the sliding block, which faces the corresponding transverse partition plate, is provided with a sealing boss which is matched with a sealing groove positioned on the corresponding transverse partition plate, the other side of the sliding block is provided with a return spring, and the other end of the return spring is provided with a support filter plate on which a plurality of overflow holes are arranged so as to limit the position of the return spring;
one end of the drill rod body is provided with a triggering mechanism which can be compressed along with the connection of the two drill rods so as to trigger the sealing mechanism by virtue of the elasticity of the triggering mechanism; the trigger mechanism comprises a centering spring arranged in the first outer cavity or the second outer cavity, and the centering spring enables a sealing boss positioned on the sliding block to be separated from a sealing groove positioned on the corresponding transverse partition plate by pushing a thimble fixed on the sliding block.
2. A self-closing multi-channel high pressure drill pipe according to claim 1, wherein: the support assembly comprises an inner support ring sleeved on the inner cylinder of the drill rod and fixedly connected with the inner support ring, an expansion ring sleeved on the inner support ring and a plurality of slips arranged on the circumference of the expansion ring; one end of the inner support ring is provided with a taper in the circumferential direction, and the other end is provided with an external thread; 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 of the expansion ring is provided with a plurality of expansion gaps for expanding the expansion end along with the screwing of the expansion ring and the inner support ring; the slips are arranged corresponding to the expansion end of the expansion ring and are uniformly distributed at the expansion end of the expansion ring.
3. A self-closing multi-channel high pressure drill pipe according to claim 2, wherein: and 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 encircle the inner side surface of the slip and are arranged in rows.
4. A self-closing multi-channel high pressure drill pipe according to claim 1, 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 cylinder which is 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 in plug-in connection with the first inner cavity.
5. A self-closing multi-channel high pressure drill pipe according to claim 1, 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.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN113445902A CN113445902A (en) | 2021-09-28 |
| CN113445902B true CN113445902B (en) | 2023-09-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113445903B (en) * | 2021-08-11 | 2023-09-19 | 中煤科工集团重庆研究院有限公司 | Self-closing double-oil-duct drill rod connecting structure |
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