CN217327165U - Drilling machine power head and water tail thereof - Google Patents
Drilling machine power head and water tail thereof Download PDFInfo
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- CN217327165U CN217327165U CN202220990626.1U CN202220990626U CN217327165U CN 217327165 U CN217327165 U CN 217327165U CN 202220990626 U CN202220990626 U CN 202220990626U CN 217327165 U CN217327165 U CN 217327165U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model belongs to the technical field of drilling machines, in particular to a drilling machine power head and a water tail thereof, wherein the water tail comprises a connecting main shaft fixedly connected with the rear end of the main shaft of the power head, and a water channel communicated with the main shaft of the power head is arranged in the connecting main shaft; the water tail also comprises a shell which is rotatably assembled outside the connecting main shaft, and the shell is provided with a water inlet hole communicated with the water channel; the water inlet sealing device is characterized in that a first sealing piece and a second sealing piece are arranged between the shell and the connecting main shaft, the first sealing piece is arranged close to the water inlet hole compared with the second sealing piece, the wear resistance of the first sealing piece is superior to that of the second sealing piece so as to block sundries in water, and the elasticity of the second sealing piece is superior to that of the first sealing piece so as to improve the sealing performance between the shell and the connecting main shaft.
Description
Technical Field
The utility model belongs to the technical field of the rig, concretely relates to water tail of rig.
Background
In order to effectively prevent gas accidents, in coal mining, the coal mining needs to be carried out after treatment, and the gas is treated by adopting a drilling pre-extraction method. When drilling, water needs to be injected to the bottom of the hole through the drill rod so as to discharge coal slag in the drill hole. The conventional drilling machine generally comprises a drilling machine power head, wherein the drilling machine power head is used for driving a drill rod to rotate, and drilling pressure is provided for drilling of a drill bit through movement of the drilling machine power head.
The structure of rig unit head is usually as shown in chinese utility model patent of grant publication No. CN213359976U, including the unit head casing (being the box shell in this patent), rotate in the unit head casing and install the unit head main shaft (being the driving shaft in this patent), connect the drilling rod on the unit head main shaft, drive the drilling rod through the rotation of unit head main shaft and rotate. The power head main shaft is usually a hollow shaft which is through from front to back, and high-pressure water is injected into the bottom of a drilling hole through the power head main shaft and a drill rod. The rear end of the power head main shaft is provided with a water tail (namely a water tap in the patent), the water tail usually comprises a shell, the shell is usually in a fixed arrangement form when in use, a connecting main shaft is rotatably arranged in the shell, the connecting main shaft is connected with the power head main shaft, a water channel is arranged in the connecting main shaft and is communicated with the power head main shaft, and the shell is usually provided with a water inlet hole communicated with the water channel. When the power head main shaft connecting device is used, the connecting main shaft rotates along with the power head main shaft, the water inlet hole is connected with the water inlet pipe, high-pressure water (such as slurry, clean water and the like) enters the water channel of the connecting main shaft through the water inlet pipe and the water inlet hole and then enters the power head main shaft, and the shell cannot rotate along with the rotation due to the relative rotation of the connecting main shaft and the shell.
In order to prevent high-pressure water from leaking out through a gap between the connecting main shaft and the inner wall of the housing, which results in high-pressure water leakage, a sealing member is usually disposed between the connecting main shaft and the inner wall of the housing, but the actual situation is as follows: the sealing member is easy to wear, especially in a mining area with poor water quality conditions, the high-pressure water contains fine particles, the fine particles are easy to accumulate at the sealing member, the fine particles in the relative rotation process of the connecting main shaft and the shell can wear the sealing member, and the service life of the sealing member is shortened. Frequent stoppages are required to replace the water tail, resulting in lower drilling efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a water tail of a drilling machine power head, which solves the technical problem that the sealing element is easy to wear and the service life of the water tail is short in the prior art; the drilling machine power head using the water tail is further provided to solve the technical problem.
In order to achieve the purpose, the utility model provides a water tail of rig unit head's technical scheme is: a water tail of a power head of a drilling machine comprises a connecting main shaft fixedly connected with the rear end of the main shaft of the power head, wherein a water channel communicated with the main shaft of the power head is arranged in the connecting main shaft; the water tail also comprises a shell which is rotatably assembled outside the connecting main shaft, and the shell is provided with a water inlet hole communicated with the water channel; the water inlet sealing device is characterized in that a first sealing piece and a second sealing piece are arranged between the shell and the connecting main shaft, the first sealing piece is arranged close to the water inlet hole compared with the second sealing piece, the wear resistance of the first sealing piece is superior to that of the second sealing piece so as to block sundries in water, and the elasticity of the second sealing piece is superior to that of the first sealing piece so as to improve the sealing performance between the shell and the connecting main shaft.
Has the advantages that: the wear resistance of the first sealing element is good, impurities in high-pressure water and water pressure impact can be blocked, the impurities are prevented from entering the second sealing element, and the second sealing element is prevented from being worn. Due to the fact that the first sealing element is good in abrasion resistance, the service life of the whole sealing element can be prolonged. Under the general condition, the better the wearability of sealing member, its hardness is higher, and sealing performance is worse more, through setting up the better second sealing member of elasticity, has guaranteed the sealing performance between connection main shaft and the casing, avoids appearing leaking the phenomenon. The utility model discloses in, through setting up two kinds of sealing members of different grade type, compromise wearability and leakproofness, guaranteed the life of sealing member under the watertight circumstances to have prolonged.
Preferably, at least one of the first sealing element and the second sealing element is arranged at least two times at intervals in sequence along the front-back direction. The larger the number of the sealing members, the better the sealing effect.
Preferably, the front end of the connecting main shaft is provided with an external thread, a sealing structure is arranged on the connecting main shaft in front of the external thread, the sealing structure is a connecting main shaft sealing surface arranged on the connecting main shaft, and the connecting main shaft sealing surface is used for being matched with a sealing ring in a main shaft of the power head to realize sealing; or the sealing structure is a connecting main shaft sealing ring arranged on the connecting main shaft, and the connecting main shaft sealing ring is used for being matched with a sealing surface in the power head main shaft to realize sealing. Through setting up seal structure, can improve the sealing performance between connection main shaft, the unit head main shaft, avoid here to leak.
Preferably, the front end of the connecting main shaft is provided with an external thread, a locking nut is screwed on the external thread and used for pushing against the end face of the rear end of the power head main shaft so as to lock the water tail on the power head main shaft. The locking nut can provide backward pretightening force for the connecting main shaft, and the threads of the connecting main shaft and the power head main shaft are ensured to be more attached, so that vibration loosening can be prevented.
Preferably, the housing comprises a main body part and an annular end cover covering the front end of the main body part, the connecting main shaft penetrates forwards from the annular end cover, and a sealing gap is formed between the annular end cover and the connecting main shaft and used for blocking foreign matters from entering the housing. The sealing gap can avoid the increase of the rotation resistance of the connecting main shaft when the annular end cover and the connecting main shaft are in direct contact, and can also avoid the entry of foreign matters, and can protect structures such as a bearing, a sealing element and the like in the shell.
The utility model discloses the technical scheme of rig unit head is: a power head of a drilling machine comprises a power head shell, a power head main shaft and a water tail, wherein the power head main shaft is rotatably installed in the power head shell, the water tail is arranged behind the power head shell and comprises a connecting main shaft fixedly connected with the rear end of the power head main shaft, a water channel communicated with the power head main shaft is arranged in the connecting main shaft, the water tail also comprises a shell which is rotatably assembled outside the connecting main shaft, and a water inlet hole communicated with the water channel is formed in the shell; the water inlet sealing device is characterized in that a first sealing piece and a second sealing piece are arranged between the shell and the connecting main shaft, the first sealing piece is arranged close to the water inlet hole compared with the second sealing piece, the wear resistance of the first sealing piece is superior to that of the second sealing piece so as to block sundries in water, and the elasticity of the second sealing piece is superior to that of the first sealing piece so as to improve the sealing performance between the shell and the connecting main shaft.
Has the advantages that: the wear resistance of the first sealing element is good, impurities in high-pressure water and water pressure impact can be blocked, the impurities are prevented from entering the second sealing element, and the second sealing element is prevented from being worn. Due to the fact that the first sealing element is good in abrasion resistance, the service life of the whole sealing element can be prolonged. Under the general condition, the better the wearability of sealing member, its hardness is higher, and sealing performance is worse more, through setting up the better second sealing member of elasticity, has guaranteed the sealing performance between connection main shaft and the casing, avoids appearing leaking the phenomenon. The utility model discloses in, through setting up two kinds of sealing members of different grade type, compromise wearability and leakproofness, guaranteed the life of sealing member under the watertight circumstances to have prolonged.
Preferably, at least one of the first sealing element and the second sealing element is arranged at least two times at intervals in sequence along the front-back direction. The greater the number of seals, the better the sealing effect.
Preferably, the front end of the connecting main shaft is provided with an external thread, a connecting main shaft sealing surface is arranged in front of the external thread on the connecting main shaft, and a sealing ring matched with the connecting main shaft sealing surface is arranged in the power head main shaft; or a connecting main shaft sealing ring is arranged in front of the external thread on the connecting main shaft, and a sealing surface matched with the connecting main shaft sealing ring is arranged in the power head main shaft. Through setting up seal structure, can improve the sealing performance between connection main shaft, the unit head main shaft, avoid here to leak.
Preferably, the front end of the connecting main shaft is provided with an external thread, a locking nut is screwed on the external thread, and the locking nut is pressed against the end face of the rear end of the power head main shaft so as to lock the water tail on the power head main shaft. The locking nut can provide backward pretightening force for the connecting main shaft, and the threads of the connecting main shaft and the power head main shaft are ensured to be more attached, so that vibration loosening can be prevented.
Preferably, the housing comprises a main body part and an annular end cover covering the front end of the main body part, the connecting main shaft penetrates forwards from the annular end cover, and a sealing gap is formed between the annular end cover and the connecting main shaft and used for blocking foreign matters from entering the housing. The sealing gap can avoid the increase of the rotation resistance of the connecting main shaft when the annular end cover and the connecting main shaft are in direct contact, and can also avoid the entry of foreign matters, and can protect structures such as a bearing, a sealing element and the like in the shell.
Drawings
Fig. 1 is a schematic structural view of a water tail of a drilling machine power head provided by the present invention;
fig. 2 is a schematic structural diagram of a drilling machine power head provided by the present invention;
description of reference numerals:
1. a housing; 2. a body portion; 3. an annular end cap; 4. a water inlet hole; 5. connecting the main shaft; 6. sealing the gap; 7. a threaded segment; 8. a first sealing surface; 9. locking the nut; 10. a bearing; 11. a first seal member; 12. a second seal member; 13. a second sealing surface; 14. a power head housing; 15. driving a drill rod; 16. water tail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, i.e., the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, 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, terms such as "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. Without further limitation, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The present invention will be described in further detail with reference to examples.
The utility model provides a concrete embodiment of water tail of rig unit head:
as shown in fig. 1, a water tail (hereinafter referred to as water tail) of a drilling machine power head is mounted at the rear end of a power head casing when in use, the water tail comprises a casing 1, the casing 1 comprises a rear main body part 2 and a front annular end cover 3, and the annular end cover 3 is fixedly mounted on the main body part 2 through bolts.
The main body part 2 is internally provided with a blind hole with an opening at the front end and a closed rear end, a bearing mounting position for mounting a bearing is arranged in the blind hole, and a groove for mounting the first sealing element 11 and the second sealing element 12 is also arranged in the blind hole and is positioned behind the bearing mounting position. The water inlet 4 is formed in one side of the rear end of the main body part 2, the water inlet 4 is communicated with the blind hole, and an external pipeline is connected to the water inlet 4 in use.
A connecting main shaft 5 is rotatably arranged in the shell 1, the front end of the connecting main shaft 5 penetrates into the power head main shaft, and the rear end penetrates into the shell 1. The connecting main shaft 5 is externally provided with a first sealing surface 8 at the front end and a second sealing surface 13 at the rear end. The front end of the connecting main shaft 5 is provided with a threaded section 7, the threaded section 7 is positioned behind the first sealing surface 8, external threads are machined on the outer portion of the threaded section 7, and a locking nut 9 is screwed on the threaded section 7.
As shown in fig. 1, a boss is processed on the connecting main shaft 5 between the first sealing surface 8 and the second sealing surface 13, two bearings 10 are installed between the housing 1 and the connecting main shaft 5 through the boss, the bearing installation position of the housing 1 and the annular end cover 3, the rotation of the connecting main shaft 5 is supported, and the connecting main shaft 5 is restrained to rotate only and cannot move back and forth.
Three grooves are formed in the hole wall of the blind hole in the main body part 2, a first sealing element 11 is installed in the last groove, a second sealing element 12 is installed in the rest two grooves, and the first sealing element 11 and the second sealing element 12 are in contact with a second sealing surface 13 and achieve sealing. The first seal 11 is made of wear-resistant material, the wear resistance is better than that of the second seal 12, the elasticity of the second seal 12 is better than that of the first seal 11, and the purpose of this is that, in the sealing field, the higher the hardness of the seal is, the lower the elastic deformability is. The first sealing member 11 functions to block some fine particles and a certain water pressure in the water, and prevent these substances from entering the second sealing member 12 to accelerate the wear of the second sealing member 12, thereby prolonging the life of the second sealing member 12. The elasticity of the second sealing element 12 is good, large elastic deformation can occur after the second sealing element is contacted with the connecting main shaft 5, the sealing performance is good, and the water tail is ensured to be flushed without leakage. In practical use, the types of the first sealing member 11 and the second sealing member 12 can be selected according to practical situations, and can be, for example, a sealing ring, an oil seal, etc.
As shown in fig. 1, the inner diameter of the annular end cover 3 is slightly larger than the diameter of the corresponding position of the connecting main shaft 5, and a sealing gap 6 is formed between the annular end cover and the connecting main shaft to prevent external foreign matters from entering the bearing 10 and influencing the normal rotation of the bearing 10. The size of the sealing gap 6 is such that the annular end cap 3 does not contact the connecting spindle 5, but foreign matter cannot normally exist. The bearing 10 is preferably a sealed bearing when in use, so that the service life of the bearing 10 is prolonged.
During installation, the connecting main shaft 5 is threaded into the power head main shaft, and the locking nut 9 is rotated after the connecting main shaft is rotated to the proper position, so that the locking nut 9 is pressed against the rear end face of the power head main shaft, and the water tail is locked on the power head main shaft. When the connecting main shaft 5 penetrates, the first sealing surface 8 is matched with a sealing ring arranged in the power head main shaft to realize sealing, and high-pressure water leakage is prevented.
In this embodiment, a sealing gap 6 is formed between the annular end cover 3 and the connecting main shaft 5. In other embodiments, a dynamic seal, such as an oil seal, may be disposed therebetween. Alternatively, the gap between the two may be enlarged, i.e. the sealing gap 6 is no longer provided.
In this embodiment, the coupling spindle 5 is screwed with a lock nut 9. In other embodiments, the lock nut 9 is eliminated.
In this embodiment, the first sealing surface 8 forms a connecting spindle sealing surface for cooperating with a sealing ring in the spindle of the power head, and the connecting spindle sealing surface forms a sealing structure provided on the connecting spindle 5. In other embodiments, the sealing structure is a connecting spindle sealing ring arranged on the connecting spindle 5, and correspondingly, a sealing surface is arranged in the power head spindle and is matched with the connecting spindle sealing ring to realize sealing. In other embodiments, the connection spindle 5 may be externally mounted to the powerhead spindle. The sealing structure at this time is correspondingly changed.
In this embodiment, there are one first seal 11 and two second seals 12. In other embodiments, the number of the first sealing member 11 and the second sealing member 12 may be increased or decreased according to actual conditions, but the first sealing member 11 must be arranged closer to the water inlet hole 4.
In this embodiment, the water inlet 4 is disposed at one side of the rear end of the housing 1. In other embodiments, the water inlet 4 may be provided at the rear end of the housing 1. In other embodiments, the water inlet 4 is arranged on one side of the middle position of the shell 1, an annular groove communicated with the water inlet 4 is arranged in the shell, the connecting main shaft 5 is provided with a plurality of circumferentially arranged radial through holes, and the radial through holes are communicated with the annular groove.
The utility model discloses the concrete embodiment of rig unit head:
as shown in fig. 2, the drilling machine power head includes a power head housing 14 and a power head spindle (not shown) rotatably mounted in the power head housing 14, a driving drill rod 15 is mounted at a front end of the power head spindle, a water tail 16 is mounted at a rear end of the power head spindle, and a structure of the water tail 16 is identical to that of the above embodiment, and is not described again here.
Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments may be modified without inventive effort, or some technical features may be substituted equally. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A water tail of a power head of a drilling machine comprises a connecting main shaft (5) fixedly connected with the rear end of a main shaft of the power head, wherein a water channel communicated with the main shaft of the power head is arranged in the connecting main shaft (5); the water tail (16) also comprises a shell (1) which is rotatably assembled outside the connecting main shaft (5), and a water inlet hole (4) communicated with the water channel is formed in the shell (1); the method is characterized in that: the improved water-saving device is characterized in that a first sealing element (11) and a second sealing element (12) are arranged between the shell (1) and the connecting main shaft (5), the first sealing element (11) is arranged close to the water inlet hole (4) compared with the second sealing element (12), the abrasion resistance of the first sealing element (11) is superior to that of the second sealing element (12) so as to block sundries in water, and the elasticity of the second sealing element (12) is superior to that of the first sealing element (11) so as to improve the sealing performance between the shell (1) and the connecting main shaft (5).
2. The water tail of a drill power head of claim 1, wherein: at least two of the first sealing element (11) and the second sealing element (12) are sequentially arranged at intervals along the front-back direction.
3. The water tail of a drill power head as recited in claim 1 or 2, wherein: the front end of the connecting main shaft (5) is provided with an external thread, a sealing structure is arranged on the connecting main shaft (5) in front of the external thread, the sealing structure is a connecting main shaft sealing surface arranged on the connecting main shaft (5), and the connecting main shaft sealing surface is used for being matched with a sealing ring in a power head main shaft to realize sealing; or the sealing structure is a connecting main shaft sealing ring arranged on the connecting main shaft (5), and the connecting main shaft sealing ring is used for being matched with a sealing surface in the power head main shaft to realize sealing.
4. The water tail of a drill power head as recited in claim 1 or 2, wherein: the front end of the connecting main shaft (5) is provided with an external thread, the external thread is screwed with a locking nut (9), and the locking nut (9) is used for being pressed on the end face of the rear end of the power head main shaft so as to lock the water tail (16) on the power head main shaft.
5. The water tail of a drill power head as recited in claim 1 or 2, wherein: the shell (1) comprises a main body part (2) and an annular end cover (3) covering the front end of the main body part (2), the connecting main shaft (5) penetrates out of the annular end cover (3) forwards, a sealing gap (6) is formed between the annular end cover (3) and the connecting main shaft (5), and the sealing gap (6) is used for preventing foreign matters from entering the shell (1).
6. A drilling machine power head comprises a power head casing (14), a power head main shaft rotatably installed in the power head casing (14), and a water tail (16) arranged behind the power head casing (14), wherein the water tail (16) comprises a connecting main shaft (5) fixedly connected with the rear end of the power head main shaft, a water channel communicated with the power head main shaft is arranged in the connecting main shaft (5), the water tail (16) also comprises a shell (1) rotatably assembled outside the connecting main shaft (5), and a water inlet hole (4) communicated with the water channel is formed in the shell (1); the method is characterized in that: the improved water-saving device is characterized in that a first sealing element (11) and a second sealing element (12) are arranged between the shell (1) and the connecting main shaft (5), the first sealing element (11) is arranged close to the water inlet hole (4) compared with the second sealing element (12), the abrasion resistance of the first sealing element (11) is superior to that of the second sealing element (12) so as to block sundries in water, and the elasticity of the second sealing element (12) is superior to that of the first sealing element (11) so as to improve the sealing performance between the shell (1) and the connecting main shaft (5).
7. The drill head of claim 6, wherein: at least two lines of the first sealing element (11) and the second sealing element (12) are sequentially arranged at intervals along the front-back direction.
8. The drill head of claim 6 or 7, wherein: the front end of the connecting main shaft (5) is provided with an external thread, a connecting main shaft sealing surface is arranged in front of the external thread on the connecting main shaft (5), and a sealing ring matched with the connecting main shaft sealing surface is arranged in the power head main shaft; or a connecting main shaft sealing ring is arranged in front of the external thread on the connecting main shaft (5), and a sealing surface matched with the connecting main shaft sealing ring is arranged in the power head main shaft.
9. The drill head of claim 6 or 7, wherein: the front end of the connecting main shaft (5) is provided with an external thread, a locking nut (9) is screwed on the external thread, and the locking nut (9) is pressed on the end face of the rear end of the power head main shaft so as to lock the water tail (16) on the power head main shaft.
10. The drill head of claim 6 or 7, wherein: the shell (1) comprises a main body part (2) and an annular end cover (3) covering the front end of the main body part (2), the connecting main shaft (5) penetrates out of the annular end cover (3) forwards, a sealing gap (6) is formed between the annular end cover (3) and the connecting main shaft (5), and the sealing gap (6) is used for preventing foreign matters from entering the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220990626.1U CN217327165U (en) | 2022-04-26 | 2022-04-26 | Drilling machine power head and water tail thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220990626.1U CN217327165U (en) | 2022-04-26 | 2022-04-26 | Drilling machine power head and water tail thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217327165U true CN217327165U (en) | 2022-08-30 |
Family
ID=82949838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220990626.1U Active CN217327165U (en) | 2022-04-26 | 2022-04-26 | Drilling machine power head and water tail thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217327165U (en) |
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2022
- 2022-04-26 CN CN202220990626.1U patent/CN217327165U/en active Active
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