CA3066018A1 - Portable drilling machine and water-seal structure of power head thereof - Google Patents
Portable drilling machine and water-seal structure of power head thereof Download PDFInfo
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- CA3066018A1 CA3066018A1 CA3066018A CA3066018A CA3066018A1 CA 3066018 A1 CA3066018 A1 CA 3066018A1 CA 3066018 A CA3066018 A CA 3066018A CA 3066018 A CA3066018 A CA 3066018A CA 3066018 A1 CA3066018 A1 CA 3066018A1
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- Prior art keywords
- water
- seal
- power head
- ring
- drilling machine
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- 238000005553 drilling Methods 0.000 title claims abstract description 65
- 238000007789 sealing Methods 0.000 claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000007790 solid phase Substances 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/022—Top drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Gasket Seals (AREA)
Abstract
A portable drilling machine and a water-seal structure of a power head thereof relate to the technical field of drilling machines. The water-seal structure of the power head comprises a power head main shaft and a water-seal inner sleeve , the power head main shaft is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the waterseal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through water injection ports, wherein two groups of sealing rings are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between the two groups of sealing rings, a water through port penetrates through the supporting ring, an adjusting ring is connected to the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned above.
Description
Description Portable drilling machine and water-seal structure of power head thereof Technical Field The invention relates to the technical field of drilling machines, in particular to a portable drilling machine and a water-seal structure of the power head thereof. The present invention is based on a Chinese patent application No. 201710462273.1 filed on Jun. 19, 2017, which is incorporated herein by reference.
Background Art A rotary pressure seal or an 0-shaped ring seal with relatively weak compensation capability is basically adopted for a water seal of a top driving head of a traditional portable full-hydraulic drilling machine. In practical applications, the sealing ring has short life, troublesome replacement, and high cost of rotary pressure sealing, especially in the working condition of using solid phase drilling fluid or circulating drilling fluid. As the drilling fluid contains a certain solid-phase substance, the sealing ring is extremely easy to damage, causing frequent replacement and affecting work efficiency.
In addition, since the water-seal outer sleeve of the conventional portable full-hydraulic drilling machine is fixed on the power head housing, the water-seal outer sleeve has no self-adaptive function when the main shaft of the power head rotating at a high speed swings, that is, the water-seal outer sleeve does not have a floating type fixing structure, gaps are formed between the water-seal inner sleeve and the sealing parts due to swinging, and solid phase substances in drilling fluid, such as fme sand, enter the gaps to aggravate abrasion of friction pairs, which is also an important reason for short service life of the conventional water-seal sealing parts.
Technical Problems In order to overcome the defects of the prior art, the invention provides a water-seal structure of a power head of a portable drilling machine, which has strong adjustment and compensation capability, can prolong the service life and does not need to replace a sealing part frequently.
In addition, the invention also provides a portable drilling machine with the water-seal structure of the power head above-mentioned.
Technical Solutions The technical scheme adopted by the invention for solving the technical problems is to provide a water-seal structure of a power head of a portable drilling machine, which comprises a power head main shaft
Background Art A rotary pressure seal or an 0-shaped ring seal with relatively weak compensation capability is basically adopted for a water seal of a top driving head of a traditional portable full-hydraulic drilling machine. In practical applications, the sealing ring has short life, troublesome replacement, and high cost of rotary pressure sealing, especially in the working condition of using solid phase drilling fluid or circulating drilling fluid. As the drilling fluid contains a certain solid-phase substance, the sealing ring is extremely easy to damage, causing frequent replacement and affecting work efficiency.
In addition, since the water-seal outer sleeve of the conventional portable full-hydraulic drilling machine is fixed on the power head housing, the water-seal outer sleeve has no self-adaptive function when the main shaft of the power head rotating at a high speed swings, that is, the water-seal outer sleeve does not have a floating type fixing structure, gaps are formed between the water-seal inner sleeve and the sealing parts due to swinging, and solid phase substances in drilling fluid, such as fme sand, enter the gaps to aggravate abrasion of friction pairs, which is also an important reason for short service life of the conventional water-seal sealing parts.
Technical Problems In order to overcome the defects of the prior art, the invention provides a water-seal structure of a power head of a portable drilling machine, which has strong adjustment and compensation capability, can prolong the service life and does not need to replace a sealing part frequently.
In addition, the invention also provides a portable drilling machine with the water-seal structure of the power head above-mentioned.
Technical Solutions The technical scheme adopted by the invention for solving the technical problems is to provide a water-seal structure of a power head of a portable drilling machine, which comprises a power head main shaft
2 and a water-seal inner sleeve fixedly sleeved on the power head main shaft, the power head main shaft is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the water-seal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through water injection ports leading to the drilling fluid channel, wherein two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between the two groups of sealing rings, a water through port communicated with the water injection port penetrates through the supporting ring, an adjusting ring capable of being adjusted upwards and downwards relative to the water-seal outer sleeve is connected to a lower end of the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned below, and when the adjusting ring moves up, the two groups of sealing rings are subjected to compressed radial deformation and compensate abrasion of the sealing rings.
Preferably, the two groups of sealing rings are a longitudinally symmetrical distribution, and the sealing rings positioned below sequentially comprise an anti-extrusion ring and a V-shaped ring from bottom to top.
Preferably, the V-shaped ring comprises two V-shaped rubber rings
Preferably, the two groups of sealing rings are a longitudinally symmetrical distribution, and the sealing rings positioned below sequentially comprise an anti-extrusion ring and a V-shaped ring from bottom to top.
Preferably, the V-shaped ring comprises two V-shaped rubber rings
3 and two V-shaped fabric rubber rings, and the V-shaped fabric rubber rings and the V-shaped rubber rings are closely provided at intervals.
Preferably, the sealing ring positioned below comprise a sand retaining ring which positioned above the V-shaped, and the sand retaining ring positioned below is provided with a sealing lip extending upwards to be between the water-seal inner sleeve and the supporting ring, the sealing lip gradually narrows from bottom to top, and the inner side of the sealing lip is attached to the outer side of the water-seal inner sleeve.
Preferably, an inclined plane matched with the outer side surface of the sealing lip is provided on the inner side of the supporting ring. Also, the adjusting ring compresses the anti-extrusion ring via a gasket.
Preferably, the water-seal outer sleeve is provided with a flange, the flange is mounted on the power head housing via at least two limiting bolts, and the flange is sleeved on a polished rod of the limiting bolt and connected with the head of the limiting bolt by a spring. Furthermore, the two limiting bolts are equal-height limiting bolts.
Preferably, the supporting ring penetrates through a plurality of water through ports in the circumferential direction, the water-seal inner sleeve penetrates in the circumferential direction through a plurality of water injection ports, an annular cavity is formed between a middle section of the inner side of the water-seal inner sleeve and the power head
Preferably, the sealing ring positioned below comprise a sand retaining ring which positioned above the V-shaped, and the sand retaining ring positioned below is provided with a sealing lip extending upwards to be between the water-seal inner sleeve and the supporting ring, the sealing lip gradually narrows from bottom to top, and the inner side of the sealing lip is attached to the outer side of the water-seal inner sleeve.
Preferably, an inclined plane matched with the outer side surface of the sealing lip is provided on the inner side of the supporting ring. Also, the adjusting ring compresses the anti-extrusion ring via a gasket.
Preferably, the water-seal outer sleeve is provided with a flange, the flange is mounted on the power head housing via at least two limiting bolts, and the flange is sleeved on a polished rod of the limiting bolt and connected with the head of the limiting bolt by a spring. Furthermore, the two limiting bolts are equal-height limiting bolts.
Preferably, the supporting ring penetrates through a plurality of water through ports in the circumferential direction, the water-seal inner sleeve penetrates in the circumferential direction through a plurality of water injection ports, an annular cavity is formed between a middle section of the inner side of the water-seal inner sleeve and the power head
4 main shaft, and 0-shaped sealing rings are provided above and below the annular cavity.
Preferably, the main shaft of the power head is provided with a plurality of through holes communicated with the annular cavity and the drilling fluid channel, and the plurality of through holes are distributed on sections with different heights along the axis direction of the power head main shaft.
Preferably, the adjusting ring is threadedly connected at a lower end of the water-seal outer sleeve, and an anti-loosening ring used for locking the adjusting ring is further provided on the water-seal outer sleeve.
In addition, the invention also provides a portable drilling machine which comprises a base frame, wherein a drilling tower is provided on the base frame, a power head rail is provided on the drilling tower, the power head is mounted on the power head rail and can slide relative to the power head rail, a water-seal structure of the power head is provided on the power head, and the water-seal structure comprises a power head main shaft and a water-seal inner sleeve fixedly sleeved on the power head main shaft, the power main shaft head is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the water-seal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through water injection ports leading to the drilling fluid channel, wherein two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between the two groups of sealing rings, a water through port communicated with the water injection port penetrates through the supporting ring, an adjusting ring capable of being adjusted upwards and downwards relative to the water-seal outer sleeve is connected to a lower end of the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned below, and when the adjusting ring moves up, the two groups of sealing rings are subjected to compressed radial deformation and compensate abrasion of the sealing rings.
Advantageous Effects The invention has the beneficial effects that according to the water-seal structure, two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, and the lower end of the water-seal outer sleeve is connected with an adjusting ring; when the sealing rings are abraded, the sealing rings can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the sealing rings are compressed by the adjusting ring, so that the sealing rings are radially deformed to provide further compensation, and can still be sealed. Therefore, harmful solid phases are prevented from entering a friction pair, the sealing rings are not required to be frequently replaced, and the service life is prolonged.
Brief Description of the Drawings The present invention will now be further described with reference to the accompanying drawings and specific examples, in which:
Fig. 1 is a structurally schematic view of an embodiment of the present invention;
Fig. 2 is a partial cross-sectional view of Fig. 1;
Fig. 3 is a partial enlarged view at A in Fig. 2;
Fig. 4 is a structurally schematic view of a seal ring according to an embodiment of the present invention.
Detailed Description The drilling machine of the invention is provided with a base frame, a drilling tower is provided on the base frame, a power head rail is provided on the drilling tower, and the power head is mounted on the power head rail and can slide relative to the power head rail. In order to seal the power head, a water-seal structure of a power head is provided on the power head. Referring to Figs. 1 and 2, the water-seal structure of the power head of the portable drilling machine provided by the invention comprises a power head main shaft 2 and a water-seal inner sleeve 1 fixedly sleeved on the power head main shaft 2, the power head main shaft 2 is axially provided with a drilling fluid channel 21, a water-seal outer sleeve 3 is sleeved outside the water-seal inner sleeve 1, and the water-seal outer sleeve 3 is mounted on a power head housing 4 and does not rotate along with the power head main shaft 2; the water-seal outer sleeve 3 and the water-seal inner sleeve 1 both penetrate through a water injection port 5 leading to the drilling fluid channel 21.
Referring to Fig. 2, two groups of sealing rings 6 distributed longitudinally are provided between the water-seal inner sleeve 1 and the water-seal outer sleeve 3, the two groups of sealing rings 6 are a longitudinally symmetrical distribution, a supporting ring 7 is clamped between the two groups of sealing rings 6, the supporting ring 7 penetrates in the circumferential direction through a plurality of water through ports 71 communicated with the water injection ports 5, and the water-seal inner sleeve 1 penetrates in the circumferential direction through a plurality of water injection ports 5; an annular cavity 12 is formed between a middle section of the inner side of the water-seal inner sleeve 1 and the power head main shaft 2, and 0-shaped sealing rings 13 are provided above and below the annular cavity 12; the power head main shaft 2 is provided with a plurality of through holes 22 communicated with the annular cavity 12 and the drilling fluid channel 21, which can increase the flowing speed of the drilling fluid; and meanwhile, the plurality of through holes 22 are distributed on sections with different heights along the axial direction of the power head main shaft 2, which will not reduce the strength limit of the power head main shaft 2 subjected to shearing force.
Referring to Fig. 4, the sealing rings positioned below sequentially comprise an anti-extrusion ring 61, a V-shaped ring 62 and a sand retaining ring 63 from bottom to top, wherein the V-shaped ring 62 comprises two V-shaped rubber rings 622 and two V-shaped fabric rubber rings 621, the V-shaped fabric rubber rings 621 and the V-shaped rubber rings 622 are closely provided at intervals, and the whole sealing rings 6 is radially expanded when being axially compressed.
Referring to Fig. 3, the sand retaining ring 63 is made of a wear-resistant material, wherein the sand retaining ring 63 positioned below is provided with a sealing lip 631 extending upwards to be between the water-seal inner sleeve 1 and the supporting ring 7, the sealing lip 631 gradually narrows from bottom to top, the inner side of the sealing lip 631 is attached to the outer side of the water-seal inner sleeve 1, and an inclined plane 72 matched with the outer side surface of the sealing lip 631 is provided on the inner side of the supporting ring 7; the sealing lip 631 is always attached to the water-seal inner sleeve 1 under the action of pressure, and most sand particles in the drilling fluid can be blocked, so that the service life of the sealing ring 6 is prolonged.
In order to reduce the replacement frequency of the sealing ring 6, the lower end of the water-seal outer sleeve 3 is connected with an adjusting ring 8, and the adjusting ring 8 is threadedly connected at the lower end of the water-seal outer sleeve 3 and compresses the anti-extrusion ring 61 by a gasket 9; when the sealing ring 6 is abraded, the sealing ring 6 can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the adjusting ring 8 is adjusted to move upwards, the two groups of sealing rings 6 are radially deformed under pressure and compensate the abrasion of the sealing rings 6, the sealing rings 6 can still provide sealing, so that harmful solid phases are prevented from entering a friction pair. In this way, the gasket 9 can effectively protect the sealing ring 6 from excessive pressure exerted by the adjusting ring 8 to cause damage to the sealing ring 6.
Optionally, the sealing ring 6 may not be provided with the sand retaining ring 63, and the V-shaped ring 62 may include only one V-shaped rubber ring 622 and one V-shaped fabric rubber ring 621, the V-shaped rubber ring 622 and the V-shaped fabric rings 621 are arranged adjacent to each other.
In addition, an anti-loosening ring 14 for locking the adjusting rings 8 is further provided on the water-seal outer sleeve 3 to prevent the adjusting rings 8 from being vibrated and displaced. Preferably, the direction of rotation of the adjusting ring 8 is the same as the direction of rotation of the power head main shaft 2, so that the adjusting ring 8 is prevented from loosening.
In addition, the water-seal outer sleeve 3 is floatingly mounted on the power head housing 4 in a spring pressing mode. Specifically, the water-seal outer sleeve 3 is provided with a flange 31, and the flange 31 is mounted on the power head housing 4 via at least two equal-height limiting bolts 10; the flange 31 is sleeved on a polished rod of the equal-height limiting bolts 10 and connected with the head of the equal-height limiting bolt 10 by a springs 11. The floating type fixing structure of the water-seal outer sleeve 3 can ensure automatic application when the main shaft of the power head 2 swings, so that no gaps are formed between the seal ring 6 and the water-seal inner sleeve 1 and harmful solid phases are prevented from entering the friction pair.
The above are only preferred embodiments of the present invention, and the present invention is not limited to the above embodiments, and as long as it achieves the technical effects of the present invention by any identical or similar means, it should fall within the protection scope of the present invention.
Industrial Applicability The water-seal structure of the power head of the drilling machine of the invention is mainly used on a portable drilling machine. With the water-seal structure of the invention, when the sealing rings are abraded, the sealing rings can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the sealing rings are compressed by the adjusting ring, so that the sealing rings are radially deformed to provide further compensation, and can still be sealed. Therefore, harmful solid phases are prevented from entering a friction pair, the sealing rings are not required to be frequently replaced, and the service life is prolonged.
Preferably, the main shaft of the power head is provided with a plurality of through holes communicated with the annular cavity and the drilling fluid channel, and the plurality of through holes are distributed on sections with different heights along the axis direction of the power head main shaft.
Preferably, the adjusting ring is threadedly connected at a lower end of the water-seal outer sleeve, and an anti-loosening ring used for locking the adjusting ring is further provided on the water-seal outer sleeve.
In addition, the invention also provides a portable drilling machine which comprises a base frame, wherein a drilling tower is provided on the base frame, a power head rail is provided on the drilling tower, the power head is mounted on the power head rail and can slide relative to the power head rail, a water-seal structure of the power head is provided on the power head, and the water-seal structure comprises a power head main shaft and a water-seal inner sleeve fixedly sleeved on the power head main shaft, the power main shaft head is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the water-seal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through water injection ports leading to the drilling fluid channel, wherein two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between the two groups of sealing rings, a water through port communicated with the water injection port penetrates through the supporting ring, an adjusting ring capable of being adjusted upwards and downwards relative to the water-seal outer sleeve is connected to a lower end of the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned below, and when the adjusting ring moves up, the two groups of sealing rings are subjected to compressed radial deformation and compensate abrasion of the sealing rings.
Advantageous Effects The invention has the beneficial effects that according to the water-seal structure, two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, and the lower end of the water-seal outer sleeve is connected with an adjusting ring; when the sealing rings are abraded, the sealing rings can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the sealing rings are compressed by the adjusting ring, so that the sealing rings are radially deformed to provide further compensation, and can still be sealed. Therefore, harmful solid phases are prevented from entering a friction pair, the sealing rings are not required to be frequently replaced, and the service life is prolonged.
Brief Description of the Drawings The present invention will now be further described with reference to the accompanying drawings and specific examples, in which:
Fig. 1 is a structurally schematic view of an embodiment of the present invention;
Fig. 2 is a partial cross-sectional view of Fig. 1;
Fig. 3 is a partial enlarged view at A in Fig. 2;
Fig. 4 is a structurally schematic view of a seal ring according to an embodiment of the present invention.
Detailed Description The drilling machine of the invention is provided with a base frame, a drilling tower is provided on the base frame, a power head rail is provided on the drilling tower, and the power head is mounted on the power head rail and can slide relative to the power head rail. In order to seal the power head, a water-seal structure of a power head is provided on the power head. Referring to Figs. 1 and 2, the water-seal structure of the power head of the portable drilling machine provided by the invention comprises a power head main shaft 2 and a water-seal inner sleeve 1 fixedly sleeved on the power head main shaft 2, the power head main shaft 2 is axially provided with a drilling fluid channel 21, a water-seal outer sleeve 3 is sleeved outside the water-seal inner sleeve 1, and the water-seal outer sleeve 3 is mounted on a power head housing 4 and does not rotate along with the power head main shaft 2; the water-seal outer sleeve 3 and the water-seal inner sleeve 1 both penetrate through a water injection port 5 leading to the drilling fluid channel 21.
Referring to Fig. 2, two groups of sealing rings 6 distributed longitudinally are provided between the water-seal inner sleeve 1 and the water-seal outer sleeve 3, the two groups of sealing rings 6 are a longitudinally symmetrical distribution, a supporting ring 7 is clamped between the two groups of sealing rings 6, the supporting ring 7 penetrates in the circumferential direction through a plurality of water through ports 71 communicated with the water injection ports 5, and the water-seal inner sleeve 1 penetrates in the circumferential direction through a plurality of water injection ports 5; an annular cavity 12 is formed between a middle section of the inner side of the water-seal inner sleeve 1 and the power head main shaft 2, and 0-shaped sealing rings 13 are provided above and below the annular cavity 12; the power head main shaft 2 is provided with a plurality of through holes 22 communicated with the annular cavity 12 and the drilling fluid channel 21, which can increase the flowing speed of the drilling fluid; and meanwhile, the plurality of through holes 22 are distributed on sections with different heights along the axial direction of the power head main shaft 2, which will not reduce the strength limit of the power head main shaft 2 subjected to shearing force.
Referring to Fig. 4, the sealing rings positioned below sequentially comprise an anti-extrusion ring 61, a V-shaped ring 62 and a sand retaining ring 63 from bottom to top, wherein the V-shaped ring 62 comprises two V-shaped rubber rings 622 and two V-shaped fabric rubber rings 621, the V-shaped fabric rubber rings 621 and the V-shaped rubber rings 622 are closely provided at intervals, and the whole sealing rings 6 is radially expanded when being axially compressed.
Referring to Fig. 3, the sand retaining ring 63 is made of a wear-resistant material, wherein the sand retaining ring 63 positioned below is provided with a sealing lip 631 extending upwards to be between the water-seal inner sleeve 1 and the supporting ring 7, the sealing lip 631 gradually narrows from bottom to top, the inner side of the sealing lip 631 is attached to the outer side of the water-seal inner sleeve 1, and an inclined plane 72 matched with the outer side surface of the sealing lip 631 is provided on the inner side of the supporting ring 7; the sealing lip 631 is always attached to the water-seal inner sleeve 1 under the action of pressure, and most sand particles in the drilling fluid can be blocked, so that the service life of the sealing ring 6 is prolonged.
In order to reduce the replacement frequency of the sealing ring 6, the lower end of the water-seal outer sleeve 3 is connected with an adjusting ring 8, and the adjusting ring 8 is threadedly connected at the lower end of the water-seal outer sleeve 3 and compresses the anti-extrusion ring 61 by a gasket 9; when the sealing ring 6 is abraded, the sealing ring 6 can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the adjusting ring 8 is adjusted to move upwards, the two groups of sealing rings 6 are radially deformed under pressure and compensate the abrasion of the sealing rings 6, the sealing rings 6 can still provide sealing, so that harmful solid phases are prevented from entering a friction pair. In this way, the gasket 9 can effectively protect the sealing ring 6 from excessive pressure exerted by the adjusting ring 8 to cause damage to the sealing ring 6.
Optionally, the sealing ring 6 may not be provided with the sand retaining ring 63, and the V-shaped ring 62 may include only one V-shaped rubber ring 622 and one V-shaped fabric rubber ring 621, the V-shaped rubber ring 622 and the V-shaped fabric rings 621 are arranged adjacent to each other.
In addition, an anti-loosening ring 14 for locking the adjusting rings 8 is further provided on the water-seal outer sleeve 3 to prevent the adjusting rings 8 from being vibrated and displaced. Preferably, the direction of rotation of the adjusting ring 8 is the same as the direction of rotation of the power head main shaft 2, so that the adjusting ring 8 is prevented from loosening.
In addition, the water-seal outer sleeve 3 is floatingly mounted on the power head housing 4 in a spring pressing mode. Specifically, the water-seal outer sleeve 3 is provided with a flange 31, and the flange 31 is mounted on the power head housing 4 via at least two equal-height limiting bolts 10; the flange 31 is sleeved on a polished rod of the equal-height limiting bolts 10 and connected with the head of the equal-height limiting bolt 10 by a springs 11. The floating type fixing structure of the water-seal outer sleeve 3 can ensure automatic application when the main shaft of the power head 2 swings, so that no gaps are formed between the seal ring 6 and the water-seal inner sleeve 1 and harmful solid phases are prevented from entering the friction pair.
The above are only preferred embodiments of the present invention, and the present invention is not limited to the above embodiments, and as long as it achieves the technical effects of the present invention by any identical or similar means, it should fall within the protection scope of the present invention.
Industrial Applicability The water-seal structure of the power head of the drilling machine of the invention is mainly used on a portable drilling machine. With the water-seal structure of the invention, when the sealing rings are abraded, the sealing rings can still provide sealing under the action of pressure, and when it cannot be sealed by pressure compensation with the sealing rings further abrasion, the sealing rings are compressed by the adjusting ring, so that the sealing rings are radially deformed to provide further compensation, and can still be sealed. Therefore, harmful solid phases are prevented from entering a friction pair, the sealing rings are not required to be frequently replaced, and the service life is prolonged.
Claims (22)
1. A water-seal structure of a power head of a portable drilling machine, comprising a power head main shaft and a water-seal inner sleeve fixedly sleeved on the power head main shaft, the power head main shaft is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the water-seal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through a water injection port leading to the drilling fluid channel, wherein, two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between two groups of the sealing rings, a water through port communicated with the water injection port penetrates through the supporting ring, an adjusting ring capable of being adjusted upwards and downwards relative to the water-seal outer sleeve is connected to a lower end of the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned below, and when the adjusting ring moves up, the two groups of sealing rings are subjected to compressed radial deformation and compensate abrasion of the sealing rings.
2. The water-seal structure of the power head of the portable drilling machine according to claim 1, wherein the two groups of sealing rings are a longitudinally symmetrical distribution, and the sealing rings positioned below sequentially comprise an anti-extrusion ring and a V-shaped ring from bottom to top.
3. The water-seal structure of the power head of the portable drilling machine according to claim 2, wherein the V-shaped ring comprises two V-shaped rubber rings and two V-shaped fabric rubber rings, and the V-shaped fabric rubber rings and the V-shaped rubber rings are closely provided at intervals.
4. The water-seal structure of the power head of the portable drilling machine according to claim 2 or 3, wherein the sealing ring positioned below comprise a sand retaining ring which positioned above the V-shaped, and the sand retaining ring positioned below is provided with a sealing lip extending upwards to be between the water-seal inner sleeve and the supporting ring, the sealing lip gradually narrows from bottom to top, and the inner side of the sealing lip is attached to the outer side of the water-seal inner sleeve.
5. The water-seal structure of the power head of the portable drilling machine according to claim 4, wherein an inclined plane matched with the outer side surface of the sealing lip is provided on the inner side of the supporting ring.
6. The water-seal structure of the power head of the portable drilling machine according to any one of claims 3 to 5, wherein the adjusting ring compresses the anti-extrusion ring by a gasket.
7. The water-seal structure of the power head of the portable drilling machine according to any one of claims 1 to 6, wherein the water-seal outer sleeve is provided with a flange, the flange is mounted on the power head housing via at least two limiting bolts, and the flange is sleeved on a polished rod of the limiting bolt and connected with the head of the limiting bolt by a spring.
8. The water-seal structure of the power head of the portable drilling machine according to claim 7, wherein the two limiting bolts are equal-height limiting bolts.
9. The water-seal structure of the power head of the portable drilling machine according to any one of claims 1 to 8, wherein the supporting ring penetrates in the circumferential direction through a plurality of water through ports, the water-seal inner sleeve penetrates in the circumferential direction through a plurality of the water injection ports, an annular cavity is formed between a middle section of the inner side of the water-seal inner sleeve and the power head main shaft, and 0-shaped sealing rings are provided above and below the annular cavity.
10. The water-seal structure of the power head of the portable drilling machine according to claim 9, wherein the power head main shaft is provided with a plurality of through holes communicated with the annular cavity and the drilling fluid channel, and the plurality of through holes are distributed on sections with different heights along the axis direction of the power head main shaft.
11. The water-seal structure of the power head of the portable drilling machine according to any one of claims 1 to 10, wherein the adjusting ring is threadedly connected at the lower end of the water-seal outer sleeve, and an anti-loosening ring used for locking the adjusting ring is further provided on the water-seal outer sleeve.
12. A portable drilling machine comprising a base frame, wherein a drilling tower is provided on the base frame, a power head rail is provided on the drilling tower, the power head is mounted on the power head rail and can slide relative to the power head rail, and a water-seal structure of the power head is provided on the power head and comprises a power head main shaft and a water-seal inner sleeve fixedly sleeved on the power head main shaft, the power head main shaft is axially provided with a drilling fluid channel, a water-seal outer sleeve is sleeved outside the water-seal inner sleeve, the water-seal outer sleeve is mounted on the power head housing, and the water-seal outer sleeve and the water-seal inner sleeve both penetrate through a water injection port leading to the drilling fluid channel, wherein, two groups of sealing rings distributed longitudinally are provided between the water-seal inner sleeve and the water-seal outer sleeve, a supporting ring is clamped between the two groups of sealing rings, a water through port communicated with the water injection port penetrates through the supporting ring, an adjusting ring capable of being adjusted upwards and downwards relative to the water-seal outer sleeve is connected to a lower end of the water-seal outer sleeve, the adjusting ring compresses the sealing ring positioned below, and when the adjusting ring moves up, the two groups of sealing rings are subjected to compressed radial deformation and compensate abrasion of the sealing rings.
13. The portable drilling machine according to claim 12, wherein the two groups of sealing rings are a longitudinally symmetrical distribution, and the sealing rings positioned below sequentially comprise an anti-extrusion ring and a V-shaped ring from bottom to top.
14. The portable drilling machine according to claim 13, wherein the V-shaped ring comprises two V-shaped rubber rings and two V-shaped fabric rubber rings, and the V-shaped fabric rubber rings and the V-shaped rubber rings are closely provided at intervals.
15. The portable drilling machine according to claim 13 or 14, wherein the sealing ring positioned below comprise a sand retaining ring which positioned above the V-shaped, and the sand retaining ring positioned below is provided with a sealing lip extending upwards to be between the water-seal inner sleeve and the supporting ring, the sealing lip gradually narrows from bottom to top, and the inner side of the sealing lip is attached to the outer side of the water-seal inner sleeve.
16. The portable drilling machine according to claim 15, wherein an inclined plane matched with the outer side surface of the sealing lip is provided on the inner side of the supporting ring.
17. The portable drilling machine according to any one of claims 14 to 16, wherein the adjusting ring compresses the anti-extrusion ring by a gasket.
18. The portable drilling machine according to any one of claims 12 to 17, wherein the water-seal outer sleeve is provided with a flange, the flange is mounted on the power head housing via at least two limiting bolts, and the flange is sleeved on a polished rod of the limiting bolt and connected with the head of the limiting bolt by a spring.
19. The portable drilling machine according to claim 18, wherein the two limiting bolts are equal-height limiting bolts.
20. The portable drilling machine according to any one of claims 12 to 19, wherein the supporting ring penetrates through a plurality of water through ports in the circumferential direction, the water-seal inner sleeve penetrates in the circumferential direction through a plurality of water injection ports, an annular cavity is formed between a middle section of the inner side of the water-seal inner sleeve and the power head main shaft, and O-shaped sealing rings are provided above and below the annular cavity.
21. The portable drilling machine according to claim 20, wherein the power head main shaft is provided with a plurality of through holes communicated with the annular cavity and the drilling fluid channel, and the plurality of through holes are distributed on sections with different heights along the axis direction of the power head main shaft.
22. The portable drilling machine according to any one of claims 12 to 21, wherein the adjusting ring is threadedly connected at the lower end of the water-seal outer sleeve, and an anti-loosening ring used for locking the adjusting ring is further provided on the water-seal outer sleeve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462273.1A CN107191600B (en) | 2017-06-19 | 2017-06-19 | A kind of power head sealing structure for water of portable drill |
| CN201710462273.1 | 2017-06-19 | ||
| PCT/CN2017/113590 WO2018233218A1 (en) | 2017-06-19 | 2017-11-29 | Portable drilling machine and power head water seal structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3066018A1 true CA3066018A1 (en) | 2018-12-27 |
| CA3066018C CA3066018C (en) | 2022-10-04 |
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ID=59879271
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3066018A Active CA3066018C (en) | 2017-06-19 | 2017-11-29 | Portable drilling machine and water-seal structure of power head thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107191600B (en) |
| CA (1) | CA3066018C (en) |
| WO (1) | WO2018233218A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191600B (en) * | 2017-06-19 | 2019-05-03 | 珠海市英格尔特种钻探设备有限公司 | A kind of power head sealing structure for water of portable drill |
| CN109025891B (en) * | 2018-10-16 | 2023-10-10 | 新疆恒智伟业石油工程技术开发有限公司 | Drilling tool hole sealing device for directional drilling of coal mine |
| CN109340489A (en) * | 2018-12-13 | 2019-02-15 | 恒天九五重工有限公司 | A kind of wired and radio universal type rotary sealing appts |
| CN110081176B (en) * | 2019-04-02 | 2024-05-28 | 浙江长城搅拌设备股份有限公司 | Long-life mechanical seal |
| CN112601444A (en) * | 2020-12-29 | 2021-04-02 | 西安永兴科技发展有限公司 | Novel composite material telescopic joint structure |
| CN115183834B (en) * | 2021-03-23 | 2023-11-17 | 厦门忻德监测科技有限公司 | Pre-buried liquid level monitor and pre-buried method |
| CN112795388B (en) * | 2021-03-24 | 2022-02-22 | 中企智造(天津)智能科技股份有限公司 | Water seal valve and coke oven single carbonization chamber pressure regulating device |
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| US4520879A (en) * | 1982-06-04 | 1985-06-04 | Deep Rock Manufacturing Company, Inc. | Ratchet and hydraulic seal assembly for rotating hollow shafts |
| SU1652710A1 (en) * | 1988-11-04 | 1991-05-30 | Производственное Объединение "Куйбышевазот" | Elastic compensation seal of rotating shaft |
| CN2247069Y (en) * | 1995-09-01 | 1997-02-12 | 林其勋 | Hand electric drill and special centralizer |
| SE530873C2 (en) * | 2007-02-14 | 2008-09-30 | Atlas Copco Rock Drills Ab | Device for rock drilling |
| CA2724381A1 (en) * | 2008-06-03 | 2009-12-10 | Atlas Copco Rock Drills Ab | Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
| CN201334868Y (en) * | 2008-12-16 | 2009-10-28 | 张家口宣化华泰矿冶机械有限公司 | Side water injection mechanism for hydraulic rock drill |
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| CN201486463U (en) * | 2009-08-28 | 2010-05-26 | 陕西省核工业地质局工程机械研究所 | Drilling machine power head with buffer mechanism |
| JP5577212B2 (en) * | 2010-10-05 | 2014-08-20 | 日本ピラー工業株式会社 | Shaft seal device |
| CN201934669U (en) * | 2011-03-10 | 2011-08-17 | 广州宝力特液压密封有限公司 | Split V-shaped combination ring |
| CN102927284B (en) * | 2012-11-12 | 2015-03-04 | 北京国电龙源环保工程有限公司 | Sealing device with universal angle compensating tube |
| CN203035955U (en) * | 2012-11-30 | 2013-07-03 | 郑州正弘桩工机械制造有限公司 | Grouting sealing structure of long spiral drilling machine power head |
| CN203114159U (en) * | 2013-01-05 | 2013-08-07 | 江苏地龙重型机械有限公司 | Rotary water-sealing device |
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| CN103615542B (en) * | 2013-12-13 | 2016-06-08 | 珠海市英格尔特种钻探设备有限公司 | Drill power head water seal |
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| CN205908268U (en) * | 2016-07-13 | 2017-01-25 | 徐工集团工程机械有限公司 | Unit head is gas box for rig |
| CN107191600B (en) * | 2017-06-19 | 2019-05-03 | 珠海市英格尔特种钻探设备有限公司 | A kind of power head sealing structure for water of portable drill |
| CN206943435U (en) * | 2017-06-19 | 2018-01-30 | 珠海市英格尔特种钻探设备有限公司 | A kind of unit head sealing structure for water of portable drill |
-
2017
- 2017-06-19 CN CN201710462273.1A patent/CN107191600B/en active Active
- 2017-11-29 WO PCT/CN2017/113590 patent/WO2018233218A1/en active Application Filing
- 2017-11-29 CA CA3066018A patent/CA3066018C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107191600B (en) | 2019-05-03 |
| WO2018233218A1 (en) | 2018-12-27 |
| CA3066018C (en) | 2022-10-04 |
| CN107191600A (en) | 2017-09-22 |
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