CN113153175B - Horizontal directional drilling machine - Google Patents
Horizontal directional drilling machine Download PDFInfo
- Publication number
- CN113153175B CN113153175B CN202110291732.0A CN202110291732A CN113153175B CN 113153175 B CN113153175 B CN 113153175B CN 202110291732 A CN202110291732 A CN 202110291732A CN 113153175 B CN113153175 B CN 113153175B
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- wall
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- sealing
- magnetic block
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- 238000005553 drilling Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 75
- 238000001802 infusion Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000003978 infusion fluid Substances 0.000 claims 3
- 239000000463 material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 11
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
Landscapes
- 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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field related to oil excavating machinery, and discloses a horizontal directional drilling machine which comprises a joint body, wherein a connector communicated with an inner cavity of the joint body is fixedly arranged on the side wall of the joint body, a bearing is movably arranged on one side of the inner wall of the joint body, a blocking cover fixed through a bolt is arranged on one side of the joint body, a conveying pipe is movably arranged on the inner wall of the bearing, a flange head is fixedly arranged at one end of the conveying pipe, a conveying cavity communicated with the inner cavity of the joint body is formed in the inner wall of the conveying pipe, and a guide pipe is movably arranged on the outer side of the conveying pipe. According to the invention, the sealing retainer ring is arranged on the side wall of the guide pipe, and the support plate is arranged on the inner wall of the sealing retainer ring, so that the sealing retainer ring is tightly attached to the inner wall of the joint body by the centrifugal force of the support plate in the rotating process of the guide pipe, the sealing performance is ensured, and the purpose of high-efficiency sealing is finally achieved.
Description
Technical Field
The invention relates to the technical field related to petroleum excavating machinery, in particular to a horizontal directional drilling machine.
Background
The horizontal directional drilling machine is a construction machine for laying various underground utilities (pipelines, cables and the like) under the condition of not excavating the ground surface, and is widely applied to the laying construction of flexible pipelines such as oil excavation, water supply, electric power, telecommunication, natural gas, gas and the like.
In the process of carrying out oil excavation by a horizontal directional drilling machine, a rotary joint is one of important key components, the rotary joint is connected with a power output shaft in rotary motion and a fixed water pipe in work, the water pipe is used for conveying slurry liquid from a slurry pump, the slurry is output by a power head, a drill rod and finally discharged by a guide drill bit, the effects of reducing temperature and reducing friction of the drill bit are achieved, and hole forming is effectively protected.
However, in the working process of the existing rotary joint, the sealing of the rotary joint is mainly realized through a sealing ring, so that in the process of high-speed continuous abrasion, the sealing ring can leak water, and a drilling machine cannot work normally.
Meanwhile, the existing rotary joint is mostly matched with a shaft by adopting a v-shaped clamp cloth combined seal, and the best sealing effect can be achieved only by adjusting at any time after the rotary joint is worn, so that the technical requirement on adjustment of a drilling machine user is high, and the phenomenon of water leakage is often caused by improper adjustment.
Disclosure of Invention
Aiming at the defects of the existing horizontal directional drilling machine in the use process in the background technology, the invention provides the horizontal directional drilling machine which has the advantages of high-efficiency sealing, self-centering, sealing strength enhancement and convenience in sealing effect adjustment, and solves the technical problems in the background technology.
The invention provides the following technical scheme: a horizontal directional drilling machine comprises a joint body, wherein a connector communicated with an inner cavity of the joint body is fixedly arranged on the side wall of the joint body, and one side of the inner wall of the joint body is movably provided with a bearing, one side of the joint body is provided with a baffle cover fixed by a bolt, the inner wall of the bearing is movably provided with a delivery pipe, and one end of the conveying pipe is fixedly provided with a flange head, the inner wall of the conveying pipe is provided with a conveying cavity communicated with the inner cavity of the joint body, and the outer side of the conveying pipe is movably provided with a conduit, the top of the conveying pipe is fixedly provided with a leakage-proof rubber which is connected with the inner wall of the conduit in a sliding way, the side wall of the conduit is provided with an infusion groove used for connecting the connector with the inner cavity of the conduit, and the lateral wall fixed mounting of pipe has the sealing ring, the lateral wall fixed mounting of pipe has the backup pad that is located the inboard of sealing ring, and sealing ring's lateral wall and the inner wall sliding connection of joint body.
Preferably, the top of the conduit is fixedly provided with a movable magnetic block, the middle part of one side of the connector body is in threaded connection with an adjusting bolt, the top of the adjusting bolt is fixedly provided with a fixed magnetic block positioned in the inner cavity of the connector body, and the movable magnetic block and the fixed magnetic block are a pair of conical magnetic blocks with mutually exclusive magnetic force.
Preferably, the outer sides of the movable magnetic blocks are fixedly connected with three guide plates, the three guide plates are arranged at equal angles by taking the central axis of the movable magnetic blocks as the center, and the three guide plates are telescopic rectangular plates.
Preferably, the inner wall of the joint body is conical, and the conical inner wall of the joint body is in sliding connection with the outer side of the sealing retainer ring.
Preferably, the infusion grooves are rectangular grooves, the number of the infusion grooves is ten, and the ten infusion grooves are all formed in the middle of the side wall of the conduit.
Preferably, the end surface of the conveying pipe is oval.
The invention has the following beneficial effects:
1. according to the invention, the sealing retainer ring is arranged on the side wall of the guide pipe, and the support plate is arranged on the inner wall of the sealing retainer ring, so that the sealing retainer ring is tightly attached to the inner wall of the joint body by the centrifugal force of the support plate in the rotating process of the guide pipe, the sealing performance is ensured, and the purpose of high-efficiency sealing is finally achieved.
2. The invention not only reduces abrasion by fixedly installing the movable magnet block at the top end of the guide pipe, but also centers the guide pipe by installing the fixed magnet block on the connector body, ensures that the sealing check ring is always positioned near the center and is convenient to center, simultaneously injects a medium in the connector into an inner cavity of the guide pipe, so that when the connector is subjected to a medium with higher pressure, the sealing position of the sealing check ring is changed by changing the magnetic distance between the movable magnet block and the fixed magnet block, the sealing strength of the sealing check ring is increased, and the sealing position between the movable magnet block and the fixed magnet block is changed by the adjusting bolt, so that the position adjustment can be carried out after the sealing check ring is abraded, and the sealing effect of the sealing check ring is ensured by automatic centering, finally, the purposes of self-centering, sealing strength enhancement and sealing effect adjustment convenience are achieved.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of the point A in FIG. 1;
FIG. 3 is a schematic view of a structural baffle of the present invention;
fig. 4 is a schematic diagram of the structural working state of the present invention.
In the figure: 1. a connector body; 2. a connector; 3. a delivery pipe; 30. a delivery lumen; 4. a flange head; 5. a bearing; 6. a blocking cover; 7. a conduit; 70. a transfusion tank; 8. leakage-proof rubber; 9. a sealing retainer ring; 10. a support plate; 11. a movable magnet block; 12. a fixed magnetic block; 13. adjusting the bolt; 14. a baffle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a horizontal directional drilling machine comprises a joint body 1, a connector 2 communicated with an inner cavity of the joint body 1 is fixedly installed on a side wall of the joint body 1, a bearing 5 is movably installed on one side of an inner wall of the joint body 1, a baffle cover 6 fixed through a bolt is arranged on one side of the joint body 1, a conveying pipe 3 is movably installed on the inner wall of the bearing 5, a flange head 4 is fixedly installed at one end of the conveying pipe 3, a conveying cavity 30 communicated with the inner cavity of the joint body 1 is formed in the inner wall of the conveying pipe 3, a guide pipe 7 is movably installed on the outer side of the conveying pipe 3, a leakage-proof rubber 8 slidably connected with the inner wall of the guide pipe 7 is fixedly installed at the top of the conveying pipe 3, a liquid conveying groove 70 communicated with the inner cavity of the guide pipe 7 is formed in the side wall of the guide pipe 7, a sealing retainer ring 9 is fixedly installed on the side wall of the guide pipe 7, a support plate 10 positioned on the inner side of the sealing retainer ring 9 is fixedly installed on the side wall of the guide pipe 7, and the lateral wall of the sealing retainer ring 9 is connected with the inner wall of the joint body 1 in a sliding manner, in order to achieve the purpose of high-efficiency sealing, the sealing retainer ring 9 is arranged on the outer side of the guide pipe 7, meanwhile, the inner wall of the sealing retainer ring 9 is provided with the supporting plate 10, and the supporting plate 10 is made of a plastic product with certain bending strength and high density, so that when the guide pipe 7 rotates, the contact strength between the sealing retainer ring 9 and the inner wall of the joint body 1 is greatly increased through the centrifugal force thrown outwards by the supporting plate 10, and the sealing performance is improved.
Wherein, the top of the conduit 7 is fixedly provided with a movable magnetic block 11, the middle part of one side of the connector body 1 is in threaded connection with an adjusting bolt 13, the top of the adjusting bolt 13 is fixedly provided with a fixed magnetic block 12 positioned in the inner cavity of the connector body 1, the movable magnetic block 11 and the fixed magnetic block 12 are a pair of conical magnetic blocks with mutually exclusive magnetic force, in order to achieve the purposes of self-centering and enhancing the sealing strength, the movable magnetic block 11 is fixedly arranged at the top end of the conduit 7, meanwhile, the fixed magnetic block 12 is arranged on the connector body 1, so that the abrasion is reduced by matching the movable magnetic block 11 and the fixed magnetic block 12, meanwhile, the conduit 7 can be centered, the sealing retainer ring 9 is always positioned near the center, the centering is convenient, meanwhile, the medium in the connector 2 is filled into the inner cavity of the conduit 7, thereby when the connector 2 is subjected to the medium with larger pressure, through the change of the magnetic distance between the movable magnetic block 11 and the fixed magnetic block 12, the sealing position of the sealing check ring 9 is changed, the sealing strength of the sealing check ring is further improved, and meanwhile, the sealing position between the movable magnetic block 11 and the fixed magnetic block 12 is changed through the adjusting bolt 13, so that the position can be adjusted after the sealing check ring 9 is worn, and the sealing effect of the sealing check ring 9 is guaranteed through automatic centering.
Wherein, the outer side of the moving magnetic block 11 is fixedly connected with three guide plates 14, the number of the guide plates 14 is three, the three guide plates 14 are all installed with the central axis of the moving magnetic block 11 as the center at equal angles, and the three guide plates 14 are all telescopic rectangular plates, in order to prevent the medium from influencing the repulsion force of the moving magnetic block 11 and the fixed magnetic block 12, the guide plates 14 are arranged on the side wall of the moving magnetic block 11, so the medium between the moving magnetic block 11 and the fixed magnetic block 12 can be reduced through the guide plates 14, and further the phenomenon that the magnetic repulsion effect is reduced due to the external reasons of the moving magnetic block 11 and the fixed magnetic block 12 is reduced, meanwhile, after the medium between the moving magnetic block 11 and the fixed magnetic block 12 flows out through the guide plates 14, the guide pipe 7 can have the trend of moving to the right, and can be pushed forward under the action of the medium through the guide plates 14, so as to increase the sealing performance of the sealing retainer ring 9, and at the same time, in the process that the guide plate 14 is rotated by the guide pipe 7, the guide plate 14 is thrown outwards due to the centrifugal force generated by the rotation of the guide pipe 7, the medium cleaning efficiency between the movable magnetic block 11 and the fixed magnetic block 12 is improved, meanwhile, the medium on the fixed magnetic block 12 can be scraped by the extending guide plate 14, and the magnetic repulsion between the movable magnetic block 11 and the fixed magnetic block 12 is not influenced.
Wherein, the inner wall that connects body 1 is the toper, and the toper inner wall that connects body 1 and the outside sliding connection of sealing retainer ring 9, in order to realize its pipe 7 at gliding in-process, can increase its sealing strength of sealing retainer ring 9, thereby establish its inner wall that connects body 1 into the toper, and make pipe 7 lateral wall and joint body 1 apart from shortening through the toper, and then increase its sealed dynamics, simultaneously, still make sealing retainer ring 9 after wearing and tearing, be convenient for impel the regulation forward.
Wherein, infusion groove 70 is the rectangular channel, and the quantity of infusion groove 70 is ten, ten infusion grooves 70 all set up in the lateral wall middle part of pipe 7, in order to realize the transport of its medium, therefore infusion groove 70 has been seted up through the lateral wall with its pipe 7 to the medium is infused into the inner chamber to pipe 7 through infusion groove 70, and then when making the medium in pipe 7 increase, because the terminal surface area that its pipe 7 consequently is far greater than the area of sealing collar 9 lateral wall, thereby make pipe 7 have the trend of pushing to one side.
Wherein, the terminal surface shape of conveyer pipe 3 is oval, in order to make between conveyer pipe 3 and the pipe 7 synchronous rotation's in-process, still can carry out the relative slip between the two to establish the terminal surface of its conveyer pipe 3 into oval, and then transferable torque, and in order to guarantee swift promotion, adopt clearance adjustment between its conveyer pipe 3 and the pipe 7.
The using method of the invention has the following working principle:
firstly, connecting the connector 2 with an input pump, and simultaneously connecting the flange head 4 with an output rod;
secondly, because the sealing check ring 9 is attached to the inner wall of the joint body 1 at the moment, and in the process of rotating the flange head 4, the guide pipe 7 is driven to synchronously rotate, so that the support plate 10 can push the sealing check ring 9 to be continuously attached to the outer side under the action of centrifugal force, the contact force between the sealing check ring 9 and the support of the joint body 1 is increased, and the sealing performance is ensured, then, a medium in the joint 2 can be poured into the inner wall of the guide pipe 7 from the infusion groove 70, and is conveyed to the conveying cavity 30 through the guide pipe 7, and is conveyed out through the conveying pipe 3;
during the transportation, because the medium has a certain pressure, part of the medium flows between the fixed magnetic block 12 and the moving magnetic block 11, and in the process that the conduit 7 rotates, the guide plate 14 is synchronously driven to rotate, the medium of the brackets of the moving magnetic block 11 and the fixed magnetic block 12 is output into the liquid conveying groove 70 through the guide plate 14, and is rotated and thrown out by the conduit 7 through the guide plate 14, the discharge rate of the medium is increased, meanwhile, the inner wall of the fixed magnetic block 12 is scraped through the contact between the guide plate 14 and the inner wall of the fixed magnetic block 12, so that no redundant medium exists between the moving magnetic block 11 and the fixed magnetic block 12, the phenomenon of magnetic repulsion between the moving magnetic block 11 and the fixed magnetic block 12 is avoided being influenced by the medium, meanwhile, after the medium is continuously sucked into the liquid conveying groove 70, the conduit 7 moves towards the right side (refer to the direction as shown in figure 4), and the magnetic repulsion between the moving magnetic block 11 and the fixed magnetic block 12 is increased, the center of the guide pipe 7 is positioned by the magnetic repulsion force between the movable magnet block 11 and the fixed magnet block 12, then the guide pipe 7 moves towards the right side, so that the extrusion force of the sealing check ring 9 and the connector body 1 is increased when the sealing check ring 9 passes through the conical inner wall of the connector body 1, the sealing strength of the sealing check ring under medium pressure is ensured, and when the medium pressure is reduced, the guide pipe 7 returns to the original position by the repulsion force between the movable magnet block 11 and the fixed magnet block 12, so that the contact pressure of the sealing check ring 9 and the inner wall of the connector body 1 is reduced, and the abrasion of the guide pipe is reduced;
finally, after the sealing retainer ring 9 is worn, the position of the fixed magnetic block 12 can be changed by adjusting the screwing amount of the adjusting bolt 13, so that after the infusion tank 70 is filled with the medium again, the sealing position of the sealing retainer ring 9 is moved to the right, and the sealing effect is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a directional rig of level, includes and connects body (1), the lateral wall fixed mounting who connects body (1) have with connect body (1) the communicating connector of inner chamber (2), and the inner wall one side movable mounting who connects body (1) has bearing (5), there is fender lid (6) through the bolt fastening one side of connecting body (1), the inner wall movable mounting of bearing (5) has conveyer pipe (3), and the one end fixed mounting of conveyer pipe (3) has flange head (4), its characterized in that: the utility model discloses a pipe joint, including conveyer pipe (3), the inner wall of conveyer pipe (3) seted up with joint body (1) inner chamber communicating transport chamber (30), and the outside movable mounting of conveyer pipe (3) has pipe (7), the top fixed mounting of conveyer pipe (3) have with pipe (7) inner wall sliding connection's leak protection rubber (8), the lateral wall of pipe (7) is offered and is used for connector (2) and the communicating infusion groove (70) of pipe (7) inner chamber, and the lateral wall fixed mounting of pipe (7) has sealing ring (9), the lateral wall fixed mounting of pipe (7) has backup pad (10) that are located sealing ring (9) inboard, and the lateral wall of sealing ring (9) and the inner wall sliding connection who connects body (1), the material of backup pad (10) is for having the plastic products that certain bending strength and density are big.
2. A horizontal directional drilling machine according to claim 1, characterized in that: the magnetic connector is characterized in that a movable magnetic block (11) is fixedly mounted at the top of the conduit (7), an adjusting bolt (13) is in threaded connection with the middle of one side of the connector body (1), a fixed magnetic block (12) located in the inner cavity of the connector body (1) is fixedly mounted at the top of the adjusting bolt (13), and the movable magnetic block (11) and the fixed magnetic block (12) are a pair of conical magnetic blocks with mutually exclusive magnetic force.
3. A horizontal directional drilling machine according to claim 2, characterized in that: the outer side of the movable magnetic block (11) is fixedly connected with three guide plates (14), the number of the guide plates (14) is three, the guide plates (14) are all installed at equal angles by taking the central axis of the movable magnetic block (11) as the center, and the three guide plates (14) are telescopic rectangular plates.
4. A horizontal directional drilling machine according to claim 1, characterized in that: the inner wall of the joint body (1) is conical, and the conical inner wall of the joint body (1) is connected with the outer side of the sealing retainer ring (9) in a sliding mode.
5. A horizontal directional drilling machine according to claim 1, characterized in that: the infusion liquid tanks (70) are rectangular tanks, the number of the infusion liquid tanks (70) is ten, and the ten infusion liquid tanks (70) are all arranged in the middle of the side wall of the conduit (7).
6. A horizontal directional drilling machine according to claim 1, characterized in that: the end surface of the conveying pipe (3) is oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291732.0A CN113153175B (en) | 2021-03-18 | 2021-03-18 | Horizontal directional drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291732.0A CN113153175B (en) | 2021-03-18 | 2021-03-18 | Horizontal directional drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113153175A CN113153175A (en) | 2021-07-23 |
| CN113153175B true CN113153175B (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110291732.0A Active CN113153175B (en) | 2021-03-18 | 2021-03-18 | Horizontal directional drilling machine |
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| CN (1) | CN113153175B (en) |
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| CN109882609A (en) * | 2019-01-29 | 2019-06-14 | 王欣 | It is a kind of being capable of the high tap of multi-angle rotary intensity |
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| CN210830479U (en) * | 2019-08-05 | 2020-06-23 | 南京中船绿洲机器有限公司 | Double-acting mechanical seal assembly |
| CN112197058A (en) * | 2020-09-28 | 2021-01-08 | 王斌 | Hydraulic bidirectional pipeline sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10129769A1 (en) * | 2001-06-20 | 2003-01-09 | Fresenius Hemocare Gmbh | Hose assembly and method of making it |
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2021
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|---|---|---|---|---|
| CN201747273U (en) * | 2010-07-23 | 2011-02-16 | 深圳市钻通工程机械股份有限公司 | Hydraulic balanced tap |
| CN102367875A (en) * | 2011-09-27 | 2012-03-07 | 徐德胜 | Sealing device with multiple sealing rings to produce different holding forces to hold rotating shaft and with sensor used for detecting leakage |
| CN202431976U (en) * | 2011-09-27 | 2012-09-12 | 徐德胜 | Sealing device with multiple sealing rings to generate different holding forces to tightly hold rotating shaft and with sensors to detect leakage |
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| CN106677718A (en) * | 2017-02-23 | 2017-05-17 | 桂林市华力重工机械有限责任公司 | Rotary connector for horizontal directional drilling machine |
| CN109882609A (en) * | 2019-01-29 | 2019-06-14 | 王欣 | It is a kind of being capable of the high tap of multi-angle rotary intensity |
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| CN210830479U (en) * | 2019-08-05 | 2020-06-23 | 南京中船绿洲机器有限公司 | Double-acting mechanical seal assembly |
| CN112197058A (en) * | 2020-09-28 | 2021-01-08 | 王斌 | Hydraulic bidirectional pipeline sealing device |
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| Publication number | Publication date |
|---|---|
| CN113153175A (en) | 2021-07-23 |
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Effective date of registration: 20220720 Address after: 224200 No.9, Weiwu Road, Dongtai Economic Development Zone, Yancheng City, Jiangsu Province Patentee after: JIANGSU HEXIN PETROLEUM MACHINERY Co.,Ltd. Patentee after: CHINA COAL MINE ENGINEERING Co.,Ltd. Address before: 224200 No.9, Weiwu Road, Dongtai Economic Development Zone, Yancheng City, Jiangsu Province Patentee before: JIANGSU HEXIN PETROLEUM MACHINERY Co.,Ltd. |