CN212359652U - Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer - Google Patents
Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer Download PDFInfo
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- CN212359652U CN212359652U CN202020921747.1U CN202020921747U CN212359652U CN 212359652 U CN212359652 U CN 212359652U CN 202020921747 U CN202020921747 U CN 202020921747U CN 212359652 U CN212359652 U CN 212359652U
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- 238000005553 drilling Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
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Abstract
The utility model provides a joint of a rotary drilling down-the-hole hammer dual-purpose drill rod, wherein a main body flange plate is fixedly connected to the outer side of the upper end of a main body steel pipe, and an annular baffle plate and a bearing bush are fixedly sleeved on the outer side of the upper part of the main body steel pipe from top to bottom; the outer side of the lower end of the hanging cap pipe is fixedly connected with a hanging cap flange plate, and the top of the inner cavity of the hanging cap pipe is fixedly provided with a hanging cap circular plate; a pair of connecting lug plates are fixedly arranged at the center of the upper end of the circular plate of the hanging cap, and a hanging cap pin shaft is rotatably connected on the pair of connecting lug plates; the bearing seat is coaxially sleeved outside the bearing bush and is connected with the bearing bush through a plurality of bearings; the outer side of the upper end of the bearing seat is fixedly connected with a bearing seat flange plate which is fixedly connected with a hanging cap flange plate through a connecting bolt; the upper end of the connecting joint is fixedly connected with the lower end of the main body steel pipe; the reinforcing sleeve is sleeved outside the connecting part of the main steel pipe and the connecting joint. The joint is suitable for dual-purpose drill rods, and can stably establish reliable connection between the drill rods and the main machine body.
Description
Technical Field
The utility model belongs to the technical field of building and bridge construction equipment, concretely relates to dig joint of dual-purpose drilling rod of down-the-hole hammer soon.
Background
In the process of pile foundation construction, hole forming is very important basic construction operation, and in the traditional construction process, different construction machines are often adopted for hole forming on different stratums. Because the rotary drilling rig has high hole forming efficiency on the soil layer, the rotary drilling rig is usually adopted when the hole forming operation is carried out on the soil layer, and the down-the-hole hammer has high hole forming efficiency on the rock-entering pile foundation, so the down-the-hole hammer is usually adopted when the hole forming operation is carried out on the rock stratum. In order to pursue higher construction efficiency, and simultaneously, also in order to better deal with the geological conditions that often soil layer and rock constitute, need frequently change the drilling rod in the work progress, and the joint that different drilling rods correspond is also different, in order to realize the connection of drilling rod and main engine body, still need to change the joint of drilling rod, this greatly reduced construction efficiency.
In order to effectively combine the advantages of the rotary drilling rig and the down-the-hole hammer, a dual-purpose drill rod suitable for rotary drilling of the rotary drilling rig and down-the-hole hammer construction is designed in the prior art, but a joint suitable for the dual-purpose drill rod does not exist in the prior art.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a dig joint of dual-purpose drilling rod of down-the-hole hammer soon, this joint is suitable for dual-purpose drilling rod to use, can establish the reliable connection between drilling rod and the host computer body steadily.
In order to achieve the purpose, the utility model provides a joint of a rotary drilling down-the-hole hammer dual-purpose drill rod, which comprises a connecting joint, a main steel pipe, a crane cap pipe, a bearing seat and a reinforcing sleeve;
the outer side of the upper end of the main steel pipe is fixedly connected with a main body flange plate, the outer side of the upper part of the main steel pipe is fixedly sleeved with an annular baffle plate, and the outer side of the upper part of the main steel pipe is fixedly sleeved with a bearing bush below the annular baffle plate;
the outer side of the lower end of the hanging cap pipe is fixedly connected with a hanging cap flange plate, the inner diameter of the hanging cap pipe is larger than the outer diameter of the annular baffle plate, the lower end of the hanging cap pipe is coaxially sleeved on the outer side of the upper part of the main body steel pipe, a hanging cap circular plate is fixedly installed at the top of the inner cavity of the hanging cap pipe, and an air distributor installation cavity for accommodating an air distributor is formed between the hanging cap circular plate and the main body flange plate; a plurality of through holes communicated with the air distributor installation cavity are formed in the pipe body of the cap pipe; a pair of connecting lug plates are fixedly arranged at the center of the upper end of the circular plate of the hanging cap, and a hanging cap pin shaft is rotatably connected to the pair of connecting lug plates;
the bearing seat is of a sleeve type structure, is positioned below the annular baffle, coaxially sleeved on the outer side of the bearing bush and connected with the bearing bush through a plurality of bearings arranged in the longitudinal direction; the outer diameter of the bearing seat is smaller than that of the annular baffle plate, the outer side of the upper end of the bearing seat is fixedly connected with a bearing seat flange plate, and the bearing seat flange plate is fixedly connected with a hanging cap flange plate through a connecting bolt so as to fixedly connect the hanging cap pipe with the bearing seat;
a communicating cavity is axially arranged at the axis of the connecting joint in a penetrating manner, the upper end of the communicating cavity is fixedly connected with the lower end of the main body steel pipe, and the communicating cavity is communicated with the inner cavity of the main body steel pipe;
the reinforcing sleeve is sleeved outside the connecting part of the main body steel pipe and the connecting joint and is fixedly connected with the main body steel pipe and the connecting joint.
Preferably, the bearing device further comprises a bearing pressing plate and a sealing pressing plate, wherein the bearing pressing plate is annular, the inner diameter of the bearing pressing plate is slightly larger than the outer diameter of the main body steel pipe, and the outer diameter of the bearing pressing plate is smaller than the inner diameter of the bearing seat; the bearing pressure plate is coaxially sleeved on the outer side of the main body steel pipe and is fixedly connected with the lower end of the bearing bush through a bolt;
the sealing pressure plate is annular, the inner diameter of the sealing pressure plate is slightly larger than the outer diameter of the bearing pressure plate, the sealing pressure plate is coaxially sleeved on the outer side of the bearing pressure plate and is fixedly connected with the lower end of the bearing seat through a bolt; an annular notch is formed in the upper end of the sealing pressure plate, and a lip edge sealing ring matched with the bearing pressure plate is arranged in the annular notch.
Further, in order to realize more reliable connection, a hanging cap rib plate is fixedly connected between the hanging cap pipe and the hanging cap flange plate; a main body rib plate is fixedly connected between the main body steel pipe and the main body flange plate; and a bearing seat rib plate is fixedly connected between the bearing seat and the bearing seat flange plate.
Preferably, the connecting joint is an external hexagonal joint.
Furthermore, in order to conveniently establish reliable connection with the reformed drilling rod, two semicircular inner positioning pin grooves are formed in the left side edge and the right side edge of the lower portion of the connecting joint in a left-right staggered mode, and the two inner positioning pin grooves extend in the front-back direction and are arranged in parallel.
Further, in order to guarantee more reliable connection, simultaneously, can also guarantee good normal running fit relation, a plurality of bearings including be located bearing bush and bearing frame upper end between aligning thrust bearing, be located respectively between bearing bush and the bearing frame middle part and two deep groove ball bearings between the lower extreme.
Furthermore, in order to realize more stable and reliable connection between the hanging cap flange plate and the bearing seat flange plate, the connecting bolt sequentially penetrates through the hanging cap flange plate and the bearing seat flange plate after penetrating through the cushion cylinder and is connected with a locking nut positioned at the lower part of the bearing seat flange plate.
Furthermore, in order to be capable of being tightly matched with the air distributor when being connected with the air distributor, the upper end face of the main body flange plate is also provided with a winding steel wire cushion.
In the utility model, the top of the inner cavity of the hanging cap pipe is fixedly connected with the hanging cap circular plate with the hanging cap ear plate, so that the integral hanging connection of the joint can be realized through the hanging cap pin shaft arranged on the hanging cap ear plate; the upper end of the main body steel pipe is connected with the main body flange plate, so that the main body steel pipe can be conveniently connected with the air distributor; the bearing bush is fixedly sleeved on the outer side of the upper part of the main body steel pipe, and the bearing seat is connected with the bearing bush through the bearing, so that the main body steel pipe can be ensured to stably rotate relative to the bearing seat; the bearing seat flange plate is connected to the upper end of the bearing seat, and the bearing flange plate is fixedly connected with the hanging cap flange plate, so that the main steel pipe can freely rotate relative to the hanging cap pipe. The annular baffle is fixedly connected to the outer side of the upper part of the main steel pipe, so that the weight of the modified drill rod and the air distributor can be borne by the annular baffle in the hoisting process; the air distributor installation cavity arranged between the upper end of the main steel pipe and the circular plate of the hanging cap can facilitate the subsequent installation of the air distributor. Through the arrangement of the reinforcing sleeve, the stable and reliable connection between the connecting joint and the main steel pipe can be ensured. Through set up interior positioning pin groove on the attach fitting, can conveniently be connected with the reliable and stable of transformation system drilling rod. The joint is suitable for dual-purpose drill rods, and can stably establish reliable connection between the drill rods and the main machine body.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the device comprises a connecting joint, 2, a reinforcing sleeve, 3, a bearing pressure plate, 4, a sealing pressure plate, 5, a main steel pipe, 6, a deep groove ball bearing, 7, a bearing bush, 8, an annular baffle, 9, a main body rib plate, 10, a main body flange plate, 11, a winding steel wire cushion, 12, a hanging cap pipe, 13, a hanging cap circular plate, 14, a hanging cap lug plate, 15, a hanging cap pin shaft, 16, a wind distributor, 17, a hanging cap rib plate, 18, a cushion cylinder, 19, a hanging cap flange plate, 20, a bearing seat flange plate, 21, a bearing seat rib plate, 22, a self-aligning thrust bearing, 23, a bearing seat, 24, a lip sealing ring, 25, a hexagonal connecting pin shaft, 26, a modified drill rod, 27, a wind distributor installation cavity, 28, a communication cavity, 29, an inner positioning pin groove, 30 and a through hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a joint of a rotary drilling down-the-hole hammer dual-purpose drill rod, which comprises a connecting joint 1, a main steel pipe 5, a crane pipe 12, a bearing seat 23 and a reinforcing sleeve 2;
the outer side of the upper end of the main steel pipe 5 is fixedly connected with a main flange plate 10, the outer side of the upper part of the main steel pipe 5 is fixedly sleeved with an annular baffle plate 8, and the outer side of the upper part of the main steel pipe 5 is fixedly sleeved with a bearing bush 7 below the annular baffle plate 8; the upper end of the bearing bush 7 is abutted against the lower end face of the annular baffle plate 8 and welded together;
a hanging cap flange plate 19 is fixedly connected to the outer side of the lower end of the hanging cap pipe 12, the inner diameter of the hanging cap pipe 12 is larger than the outer diameter of the annular baffle plate 8, the lower end of the hanging cap pipe is coaxially sleeved on the outer side of the upper part of the main steel pipe 5, a hanging cap circular plate 13 is fixedly installed at the top of the inner cavity of the hanging cap pipe, and an air distributor installation cavity 27 for accommodating an air distributor 16 is formed between the hanging cap circular plate 13 and the main flange plate 10; a plurality of through holes 30 communicated with the air distributor installation cavity 27 are formed in the pipe body of the hanging cap pipe 12; the plurality of through holes 30 are used for connecting air supply pipelines into the air distributor 6 in a subsequent process; a pair of connecting lug plates 14 are fixedly arranged at the center of the upper end of the lifting cap circular plate 13, and a lifting cap pin shaft 15 is rotatably connected to the pair of connecting lug plates 14;
the bearing seat 23 is of a sleeve type structure, is positioned below the annular baffle plate 8, is coaxially sleeved outside the bearing bush 7, and is connected with the bearing bush 7 through a plurality of bearings arranged in the longitudinal direction; the outer diameter of the bearing seat 23 is smaller than that of the annular baffle plate 8, the outer side of the upper end of the bearing seat is fixedly connected with a bearing seat flange plate 20, and the bearing seat flange plate 20 is fixedly connected with the hanging cap flange plate 19 through a connecting bolt so as to fixedly connect the hanging cap pipe 12 with the bearing seat 23;
a communication cavity 28 is axially arranged at the axis of the connecting joint 1 in a penetrating manner, the upper end of the connecting joint is fixedly connected with the lower end of the main steel pipe 5, and the communication cavity 28 is communicated with the inner cavity of the main steel pipe 5;
the reinforcing sleeve 2 is sleeved on the outer side of the connecting part of the main body steel pipe 5 and the connecting joint 1 and is fixedly connected with the main body steel pipe 5 and the connecting joint 1.
Preferably, the bearing device further comprises a bearing pressure plate 3 and a sealing pressure plate 4, wherein the bearing pressure plate 3 is annular, the inner diameter of the bearing pressure plate is slightly larger than the outer diameter of the main steel pipe 5, and the outer diameter of the bearing pressure plate is smaller than the inner diameter of the bearing seat 23; the bearing pressure plate 3 is coaxially sleeved on the outer side of the main steel pipe 5 and is fixedly connected with the lower end of the bearing bush 7 through a bolt;
the sealing pressure plate 4 is annular, the inner diameter of the sealing pressure plate is slightly larger than the outer diameter of the bearing pressure plate 3, the sealing pressure plate is coaxially sleeved outside the bearing pressure plate 3 and is fixedly connected with the lower end of the bearing seat 23 through a bolt; an annular notch is formed in the upper end of the sealing pressure plate 4, and a lip edge sealing ring 24 matched with the bearing pressure plate 3 is arranged in the annular notch.
In order to realize more reliable connection, a hanging cap rib plate 17 is fixedly connected between the hanging cap pipe 12 and the hanging cap flange plate 19; a main body rib plate 9 is fixedly connected between the main body steel pipe 5 and the main body flange plate 10; and a bearing seat rib plate 21 is fixedly connected between the bearing seat 23 and the bearing seat flange plate 20.
Preferably, the connection joint 1 is an external hexagonal joint.
In order to facilitate the establishment of a reliable connection with the modified drill rod 26, the left side edge and the right side edge of the lower portion of the coupling joint 1 are provided with two semicircular inner positioning pin grooves 29 in a left-right staggered manner, and the two inner positioning pin grooves 29 extend in the front-rear direction and are arranged in parallel. Two outer positioning pin grooves are arranged on the modified drill rod 26 corresponding to the two inner positioning pin grooves 29, so that when in connection, the connection joint 1 can be inserted into an inner hexagonal joint in the modified drill rod 26, and then the two hexagonal connection pin shafts 25 are inserted into a space surrounded by the inner positioning pin grooves 29 and the outer positioning pin grooves, so that the joint and the modified drill rod 26 can be reliably connected.
In order to ensure a more reliable connection and simultaneously ensure a good running fit, the plurality of bearings comprise a self-aligning thrust bearing 22 located between the upper ends of the bearing bush 7 and the bearing seat 23, and two deep groove ball bearings 6 located between the middle parts and between the lower ends of the bearing bush 7 and the bearing seat 23, respectively.
In order to realize more stable and reliable connection between the hanging cap flange plate and the bearing seat flange plate, the connecting bolt penetrates through the cushion cylinder 18 and then sequentially penetrates through the hanging cap flange plate 19 and the bearing seat flange plate 20 and is connected with a locking nut positioned at the lower part of the bearing seat flange plate 20.
In order to be able to have a closer fit with the air distributor when connecting with the air distributor, the upper end face of the main body flange plate 10 is further provided with a winding steel wire mat 11.
The top of the inner cavity of the cap pipe is fixedly connected with a cap circular plate with a cap ear plate, so that the integral hoisting connection of the butt joint can be realized through a cap pin shaft arranged on the cap ear plate; the upper end of the main body steel pipe is connected with the main body flange plate, so that the main body steel pipe can be conveniently connected with the air distributor; the bearing bush is fixedly sleeved on the outer side of the upper part of the main body steel pipe, and the bearing seat is connected with the bearing bush through the bearing, so that the main body steel pipe can be ensured to stably rotate relative to the bearing seat; the bearing seat flange plate is connected to the upper end of the bearing seat, and the bearing flange plate is fixedly connected with the hanging cap flange plate, so that the main steel pipe can freely rotate relative to the hanging cap pipe. The annular baffle is fixedly connected to the outer side of the upper part of the main steel pipe, so that the weight of the modified drill rod and the air distributor can be borne by the annular baffle in the hoisting process; the air distributor installation cavity arranged between the upper end of the main steel pipe and the circular plate of the hanging cap can facilitate the subsequent installation of the air distributor. Through the arrangement of the reinforcing sleeve, the stable and reliable connection between the connecting joint and the main steel pipe can be ensured. Through set up interior positioning pin groove on the attach fitting, can conveniently be connected with the reliable and stable of transformation system drilling rod. The upper end of the connector can be conveniently connected with the machine body, the connecting connector 1 at the lower end can be conveniently inserted into the reformed drill rod 26 and fixedly connected through a connecting pin shaft, the connector is suitable for dual-purpose drill rods, and reliable connection between the drill rod and the main machine body can be stably established.
Claims (8)
1. A joint of a rotary drilling down-the-hole hammer dual-purpose drill rod comprises a connecting joint (1) and is characterized by further comprising a main steel pipe (5), a cap hanging pipe (12), a bearing seat (23) and a reinforcing sleeve (2);
the outer side of the upper end of the main steel pipe (5) is fixedly connected with a main flange plate (10), the outer side of the upper part of the main steel pipe (5) is fixedly sleeved with an annular baffle plate (8), and the outer side of the upper part of the main steel pipe (5) is fixedly sleeved with a bearing bush (7) below the annular baffle plate (8);
a hanging cap flange plate (19) is fixedly connected to the outer side of the lower end of the hanging cap pipe (12), the inner diameter of the hanging cap pipe (12) is larger than the outer diameter of the annular baffle plate (8), the lower end of the hanging cap pipe is coaxially sleeved on the outer side of the upper part of the main body steel pipe (5), a hanging cap circular plate (13) is fixedly installed at the top of the inner cavity of the hanging cap pipe, and an air distributor installation cavity (27) for accommodating an air distributor (16) is formed between the hanging cap circular plate (13) and the main body flange plate (10); a plurality of through holes (30) communicated with the air distributor installation cavity (27) are formed in the pipe body of the hanging cap pipe (12); a pair of connecting lug plates (14) is fixedly arranged at the center of the upper end of the hanging cap circular plate (13), and a hanging cap pin shaft (15) is rotatably connected to the pair of connecting lug plates (14);
the bearing seat (23) is of a sleeve type structure, is positioned below the annular baffle (8), coaxially and concentrically sleeved on the outer side of the bearing bush (7), and is connected with the bearing bush (7) through a plurality of bearings arranged in the longitudinal direction; the outer diameter of the bearing seat (23) is smaller than that of the annular baffle (8), the outer side of the upper end of the bearing seat is fixedly connected with a bearing seat flange plate (20), and the bearing seat flange plate (20) is fixedly connected with a hanging cap flange plate (19) through a connecting bolt so as to fixedly connect the hanging cap pipe (12) with the bearing seat (23);
a communicating cavity (28) is axially arranged at the axis of the connecting joint (1) in a penetrating manner, the upper end of the communicating cavity is fixedly connected with the lower end of the main body steel pipe (5), and the communicating cavity (28) is communicated with the inner cavity of the main body steel pipe (5);
the reinforcing sleeve (2) is sleeved on the outer side of the connecting part of the main body steel pipe (5) and the connecting joint (1) and is fixedly connected with the main body steel pipe (5) and the connecting joint (1) simultaneously.
2. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod according to claim 1, further comprising a bearing pressing plate (3) and a sealing pressing plate (4), wherein the bearing pressing plate (3) is annular, the inner diameter of the bearing pressing plate is slightly larger than the outer diameter of the main body steel pipe (5), and the outer diameter of the bearing pressing plate is smaller than the inner diameter of the bearing seat (23); the bearing pressure plate (3) is coaxially sleeved on the outer side of the main steel pipe (5) and is fixedly connected with the lower end of the bearing bush (7) through a bolt;
the sealing pressure plate (4) is annular, the inner diameter of the sealing pressure plate is slightly larger than the outer diameter of the bearing pressure plate (3), the sealing pressure plate is coaxially sleeved on the outer side of the bearing pressure plate (3) and is fixedly connected with the lower end of the bearing seat (23) through a bolt; an annular notch is formed in the upper end of the sealing pressure plate (4), and a lip edge sealing ring (24) matched with the bearing pressure plate (3) is arranged in the annular notch.
3. The joint of the rotary drilling dual-purpose drill rod for the down-the-hole hammer according to claim 1 or 2, characterized in that a hanging cap rib plate (17) is fixedly connected between the hanging cap pipe (12) and the hanging cap flange plate (19); a main body rib plate (9) is fixedly connected between the main body steel pipe (5) and the main body flange plate (10); and a bearing seat rib plate (21) is fixedly connected between the bearing seat (23) and the bearing seat flange plate (20).
4. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod according to claim 3, wherein the connecting joint (1) is an external hexagonal joint.
5. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod as claimed in claim 4, wherein the left side edge and the right side edge of the lower part of the connecting joint (1) are provided with two semicircular inner positioning pin grooves (29) in a left-right staggered manner, and the two inner positioning pin grooves (29) extend in the front-back direction and are arranged in parallel.
6. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod as claimed in claim 5, wherein the plurality of bearings comprise a self-aligning thrust bearing (22) positioned between the bearing bush (7) and the upper end of the bearing seat (23), and two deep groove ball bearings (6) respectively positioned between the middle part and the lower end of the bearing bush (7) and the bearing seat (23).
7. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod as claimed in claim 6, wherein the connecting bolt passes through the cushion cylinder (18), then sequentially passes through the hanging cap flange plate (19) and the bearing seat flange plate (20) and is connected with a locking nut located at the lower part of the bearing seat flange plate (20).
8. The joint of the rotary drilling and down-the-hole hammer dual-purpose drill rod according to claim 7, characterized in that a winding steel wire cushion (11) is further mounted on the upper end face of the main body flange plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020921747.1U CN212359652U (en) | 2020-05-27 | 2020-05-27 | Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020921747.1U CN212359652U (en) | 2020-05-27 | 2020-05-27 | Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212359652U true CN212359652U (en) | 2021-01-15 |
Family
ID=74155812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020921747.1U Withdrawn - After Issue CN212359652U (en) | 2020-05-27 | 2020-05-27 | Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212359652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691830A (en) * | 2020-05-27 | 2020-09-22 | 徐州雷曼机械科技有限公司 | Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer |
-
2020
- 2020-05-27 CN CN202020921747.1U patent/CN212359652U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691830A (en) * | 2020-05-27 | 2020-09-22 | 徐州雷曼机械科技有限公司 | Joint of dual-purpose drill rod of rotary drilling down-the-hole hammer |
| CN111691830B (en) * | 2020-05-27 | 2024-05-14 | 徐州雷曼机械科技有限公司 | Joint of dual-purpose drilling rod of rotary drilling down-the-hole hammer |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210115 Effective date of abandoning: 20240514 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210115 Effective date of abandoning: 20240514 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |