CN113997211A - Direct built-in ultrasonic vibration assisted water jet nozzle - Google Patents
Direct built-in ultrasonic vibration assisted water jet nozzle Download PDFInfo
- Publication number
- CN113997211A CN113997211A CN202111318215.4A CN202111318215A CN113997211A CN 113997211 A CN113997211 A CN 113997211A CN 202111318215 A CN202111318215 A CN 202111318215A CN 113997211 A CN113997211 A CN 113997211A
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- China
- Prior art keywords
- vibrator
- ultrasonic
- ultrasonic vibration
- vibration assisted
- water jet
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 26
- 238000009434 installation Methods 0.000 claims description 22
- 239000000919 ceramic Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000011435 rock Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
- B28D1/222—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising by pressing, e.g. presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention provides a direct built-in ultrasonic vibration assisted water jet nozzle, which comprises: a housing having an interior cavity; the vibrator mounting plate is fixed in the inner cavity and is perpendicular to the flow direction of fluid in the inner cavity; the ultrasonic vibrator is fixed on the vibrator mounting plate and positioned in the inner cavity, and can emit ultrasonic waves to the fluid in the inner cavity; and the control assembly is arranged outside the shell and is electrically connected with the ultrasonic vibrator. The invention has the advantages that the ultrasonic vibrator is arranged in the shell, so that the vibration frequency and the input power of the ultrasonic vibrator can be controlled according to the actual working condition of jet flow crushing, and particularly, the efficiency of rock crushing can be effectively improved when the fixed frequency resonance cutting and crushing are carried out on the natural frequencies of crushed objects, cut objects and the like.
Description
Technical Field
The invention relates to the field of tunneling devices, in particular to a direct built-in ultrasonic vibration assisted water jet nozzle.
Background
The existing water jet nozzle comprises a support platform, an abrasive stirring box is placed on the support platform, an outlet of the abrasive stirring box is connected with an abrasive conveying pipe, the end part of an abrasive conveying end is connected with a nozzle, a diaphragm type metering pump and an energy accumulator are arranged on the abrasive conveying pipe, and a first ultrasonic vibration device is arranged at the position, close to the nozzle, of the abrasive conveying pipe.
In the prior art, a first ultrasonic vibration device is arranged at a position, close to a nozzle, of an abrasive conveying pipe, the ultrasonic vibration device is arranged outside a pipeline, and the improvement on the rock breaking efficiency is not obvious.
Disclosure of Invention
The invention provides a direct built-in ultrasonic vibration assisted water jet nozzle, which aims to improve the rock breaking efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: a direct built-in ultrasonic vibration assisted waterjet nozzle comprising: a housing having an interior cavity; the vibrator mounting plate is fixed in the inner cavity and is perpendicular to the flow direction of fluid in the inner cavity; the ultrasonic vibrator is fixed on the vibrator mounting plate and positioned in the inner cavity, and can emit ultrasonic waves to the fluid in the inner cavity; and the control assembly is arranged outside the shell and is electrically connected with the ultrasonic vibrator.
Further, the ultrasound transducer includes: the piezoelectric ceramic transducer is fixedly connected with one side end face of the vibrator mounting plate; the section of the amplitude transformer is in a wedge-shaped structure, the large-diameter end of the amplitude transformer is connected with the piezoelectric ceramic transducer, and the small-diameter end of the amplitude transformer faces the outlet of the inner cavity.
Furthermore, the directly built-in ultrasonic vibration assisted water jet nozzle also comprises a water wave reinforcing cover which is fixedly connected with the small-diameter end of the amplitude transformer.
Further, the housing includes: the spray head body is provided with a jet hole which is axially arranged and is connected with the outlet of the inner cavity; and the vibrator mounting body is fixedly connected with one end of the spray head body, which is far away from the jet hole, and the vibrator mounting plate is fixed on the inner wall of the vibrator mounting body.
Furthermore, the inner wall of the vibrator installation body is provided with a step surface, the inner wall surface above the step surface is an internal thread section, the vibrator installation plate is abutted against the step surface, and the directly built-in ultrasonic vibration assisted water jet nozzle also comprises a pressing ring which is matched and connected with the internal thread section and can tightly press the vibrator installation plate on the step surface.
Furthermore, the vibrator installation body is provided with a wire channel, the ultrasonic vibrator further comprises a wire, one end of the wire is electrically connected with the piezoelectric ceramic transducer, and the other end of the wire can penetrate through the wire channel and is connected with an external power supply assembly.
Further, the inner side port of the wire passage is provided with a wire sealing ram and sealing plastic for sealing.
Furthermore, the directly built-in ultrasonic vibration assisted water jet nozzle also comprises a high-pressure water input joint which is arranged at one end of the vibrator installation body far away from the nozzle body.
Further, a first sealing assembly is arranged between the high-pressure water input joint and the oscillator mounting body.
Further, a second sealing assembly is arranged between the oscillator mounting body and the spray head body.
The invention has the advantages that the ultrasonic vibrator is arranged in the shell, so that the vibration frequency and the input power of the ultrasonic vibrator can be controlled according to the actual working condition of jet flow crushing, and particularly, the efficiency of rock crushing can be effectively improved when the fixed frequency resonance cutting and crushing are carried out on the natural frequencies of crushed objects, cut objects and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the pressure ring;
FIG. 3 is a schematic top view of the structure of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the vibrator mounting plate;
FIG. 5 is a schematic top view of the structure of FIG. 4;
FIG. 6 is a schematic structural view of a water wave reinforcing cover;
fig. 7 is a schematic top view of the structure of fig. 6.
Reference numbers in the figures: 1. a water wave reinforcing cover; 8. a vibrator mounting plate; 9. pressing a ring; 10. a vibrator mounting body; 11. a high-pressure water input joint; 12. a first seal assembly; 14. sealing the plastic; 15. a wire sealing pressure head; 16. a wire; 18. a second seal assembly; 23. a spray head body; 24. a jet hole; 61. an amplitude transformer; 62. a piezoelectric ceramic transducer.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 7, an embodiment of the present invention provides a direct built-in ultrasonic vibration assisted water jet head, which includes a housing, a vibrator mounting plate 8, an ultrasonic vibrator, and a control assembly. The shell is provided with an inner cavity; the vibrator mounting plate 8 is fixed in the inner chamber and arranged perpendicular to the flow direction of the fluid in the inner chamber. The ultrasonic vibrator is fixed on the vibrator mounting plate 8 and positioned in the inner cavity, and the ultrasonic vibrator can emit ultrasonic waves to fluid in the inner cavity; the control assembly is arranged outside the shell and is electrically connected with the ultrasonic vibrator.
The ultrasonic vibrator is arranged in the shell, so that the vibration frequency and the input power of the ultrasonic vibrator can be controlled according to the actual working condition requirement of jet flow crushing, and particularly, the efficiency of rock crushing can be effectively improved when the fixed frequency resonance cutting and crushing are carried out on the natural frequencies of crushed objects, cut objects and the like.
The ultrasonic vibrator includes a piezoelectric ceramic transducer 62 and a horn 61. The piezoelectric ceramic transducer 62 is fixedly connected with one side end face of the vibrator mounting plate 8; the section of the amplitude transformer 61 is in a wedge-shaped structure, the large-diameter end of the amplitude transformer 61 is connected with the piezoelectric ceramic transducer 62, and the small-diameter end of the amplitude transformer 61 faces the outlet of the inner cavity.
In this embodiment, the piezoelectric ceramic transducer 62 and the amplitude transformer 61 can convert the ultrasonic vibration into the ultrasonic jet, the conversion efficiency of the ultrasonic vibrator is simple and efficient, and the output power of the ultrasonic vibrator can be converted into the ultrasonic jet pulse energy with high amplitude to a greater extent.
Further, the piezoelectric ceramic transducer 62 is immersed in the high-pressure water in the inner cavity, and can directly exchange heat with the high-pressure water, so that the piezoelectric ceramic transducer 62 can dissipate heat conveniently.
Preferably, the directly built-in ultrasonic vibration assisted water jet nozzle further comprises a water wave reinforcing cover 1 fixedly connected with the small-diameter end of the amplitude transformer 61. The water wave reinforcing cover 1 is as shown in fig. 6 and 7, the cross section of the water wave reinforcing cover 1 is a bowl-shaped structure, the diameter of an opening is larger than that of a closed end, and the water wave reinforcing cover 1 is used for amplifying ultrasonic vibration of an ultrasonic vibrator to form high-amplitude ultrasonic jet flow pulse energy.
As shown in fig. 1, the housing includes a head body 23 and a vibrator-mounted body 10. The spray head body 23 is provided with a jet hole 24 which is axially arranged, and the jet hole 24 is connected with the outlet of the inner cavity; the vibrator installation body 10 is fixedly connected with one end of the spray head body 23 far away from the jet orifice 24, and the vibrator installation plate 8 is fixed on the inner wall of the vibrator installation body 10.
The vibrator mounting plate 8 in this embodiment is disposed in a direction perpendicular to the flow direction of the high-pressure water, i.e., in the direction of the arrow (high-pressure water flow direction) in fig. 1. The ultrasonic vibrator is fixedly arranged in the middle of the vibrator mounting plate 8 and faces the jet hole 24.
The inner wall of the vibrator installation body 10 is provided with a step surface, the inner wall surface above the step surface is an internal thread section, the vibrator installation plate 8 is abutted against the step surface, and the directly built-in ultrasonic vibration assisted water jet nozzle further comprises a pressing ring 9 which is matched and connected with the internal thread section and can tightly press the vibrator installation plate 8 on the step surface.
The ultrasonic vibrator and the matched components thereof are installed in the vibrator installation plate 8 in a centralized mode in the embodiment, and then the nozzle body 23 is connected, so that the difficulty of production and installation can be reduced, and later maintenance is facilitated.
Specifically, the ultrasonic vibrator is mounted on the vibrator mounting plate 8 in a bolt connection mode, the vibrator mounting plate 8 is mounted on a step surface of the vibrator mounting body 10, and the pressing ring 9 and the vibrator mounting body 10 are pressed and fixed on the vibrator mounting plate 8 in a threaded fit mode.
Preferably, a wire channel is arranged on the vibrator installation body 10, the ultrasonic vibrator further comprises a wire 16, one end of the wire is electrically connected with the piezoelectric ceramic transducer 62, and the other end of the wire 16 can penetrate through the wire channel and is connected with an external power supply assembly. The inner side port of the wire passage is provided with a wire sealing ram 15 and sealing plastic 14 for sealing.
After the lead 16 is connected with two stages of the piezoelectric ceramic transducer 62, the lead penetrates out of the lead channel of the electric wire sealing pressure head 15, the sealing plastic 14 and the vibrator installation body 10, the electric wire sealing pressure head 15 compresses the sealing plastic 14, an inner hole of the sealing plastic 14 becomes small under the action of pretightening force to extrude the lead 16, the purpose of sealing is achieved, and the sealing effect is better when the pressure is larger.
The control component is arranged outside the shell, a high-frequency signal sent by the control component controls and drives the piezoelectric ceramic transducer 62 to generate ultrasonic vibration through the lead 16, the amplitude of the ultrasonic vibration is amplified through the amplitude transformer 61, the directional large-amplitude vibration is converted into high-pressure water pressure waves with large amplitude through the water wave enhancement cover 1, and the high-pressure water pressure waves are converted into ultrasonic jet through the jet hole 24 of the jet body 23. The ultrasonic wave can improve the cutting and crushing capability of the high-pressure water jet, and further achieve the purpose of improving the rock breaking efficiency.
It should be noted that, in this embodiment, there are few active vibration elements, only the ultrasonic vibrator is an active vibration element, and other components and parts are only passively vibrated, so that the optimal design of other components and parts is facilitated, and the reliability of the device is improved.
As shown in fig. 1, the directly built-in ultrasonic vibration assisted water jet head further comprises a high pressure water input joint 11 disposed at an end of the vibrator mounting body 10 away from the head body 23. A high pressure water inlet connection 11 is provided through which high pressure water can be injected into the inner cavity for use by the jet.
Preferably, the high-pressure water input connector 11 and the vibrator installation body 10 are locked and fixed in a threaded fit mode, a groove is formed in the high-pressure water input connector 11, and the matching surfaces of the first sealing assembly 12 and the vibrator installation body 10, which are placed in the groove, are mutually extruded to play a sealing role; the vibrator installation body 10 and the spray head body 23 are locked and fixed in a threaded matching mode, a groove is formed in the vibrator installation body 10, and the matching surfaces of the second sealing assembly 18 and the spray head body 23 placed in the groove are mutually extruded to play a sealing role.
When the high-pressure water generator works, high-pressure water generated by the high-pressure water generator is conveyed into the spray head body 23 through the high-pressure water input joint 11; the ultrasonic vibrator generates controllable ultrasonic vibration, the ultrasonic vibration energy is converted into high-pressure water through the water wave reinforcing cover 1, and the high-pressure water is converted into high-speed jet flow with ultrasonic wave fluctuation through the spray head body 23, so that the aim of increasing jet flow impact pulsation is fulfilled, and the aim of reinforcing the rock breaking effect is fulfilled.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the ultrasonic vibrator is arranged in the shell, so that the vibration frequency and the input power of the ultrasonic vibrator can be controlled according to the actual working condition requirement of jet flow crushing, and particularly, the efficiency of rock crushing can be effectively improved when the fixed frequency resonance cutting and crushing are carried out on the natural frequencies of crushed objects, cut objects and the like.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (10)
1. A direct built-in ultrasonic vibration assisted water jet nozzle, comprising:
a housing having an interior cavity;
the vibrator mounting plate (8) is fixed in the inner cavity and is perpendicular to the flowing direction of fluid in the inner cavity;
the ultrasonic vibrator is fixed on the vibrator mounting plate (8) and is positioned in the inner cavity, and the ultrasonic vibrator can emit ultrasonic waves to the fluid in the inner cavity;
and the control assembly is arranged outside the shell and is electrically connected with the ultrasonic vibrator.
2. The direct built-in ultrasonic vibration assisted water jet head of claim 1, wherein the ultrasonic vibrator comprises:
the piezoelectric ceramic transducer (62) is fixedly connected with one side end face of the vibrator mounting plate (8);
the section of the amplitude transformer (61) is in a wedge-shaped structure, the large-diameter end of the amplitude transformer (61) is connected with the piezoelectric ceramic transducer (62), and the small-diameter end of the amplitude transformer (61) faces the outlet of the inner cavity.
3. The direct built-in ultrasonic vibration assisted water jet head according to claim 2, further comprising a water wave reinforcing cover (1) fixedly connected with the small-diameter end of the horn (61).
4. A direct built-in ultrasonic vibration assisted water jet head according to claim 3, wherein the housing comprises:
the spray head body (23) is provided with a spray hole (24) which is axially arranged, and the spray hole (24) is connected with the outlet of the inner cavity;
the vibrator installation body (10) is fixedly connected with one end, far away from the jet orifice (24), of the spray head body (23), and the vibrator installation plate (8) is fixed on the inner wall of the vibrator installation body (10).
5. The direct built-in ultrasonic vibration assisted water jet head according to claim 4, characterized in that the inner wall of the vibrator mounting body (10) is provided with a step surface, the inner wall surface above the step surface is an internal thread section, the vibrator mounting plate (8) is abutted against the step surface, and the direct built-in ultrasonic vibration assisted water jet head further comprises a pressing ring (9) which is connected with the internal thread section in a matching manner and can press the vibrator mounting plate (8) against the step surface.
6. The direct built-in ultrasonic vibration assisted water jet head according to claim 4, characterized in that a wire channel is arranged on the vibrator mounting body (10), the ultrasonic vibrator further comprises a wire (16), one end of the wire is electrically connected with the piezoelectric ceramic transducer (62), and the other end of the wire (16) can penetrate through the wire channel and is electrically connected with an external power supply component and the control component.
7. The direct built-in ultrasonic vibration assisted water jet head according to claim 6, characterized in that the inner port of the wire channel is provided with a wire sealing ram (15) and sealing plastic (14) for sealing.
8. The direct built-in ultrasonic vibration assisted waterjet head according to claim 4, wherein the direct built-in ultrasonic vibration assisted waterjet head further comprises a high pressure water input joint (11) arranged at one end of the vibrator mounting body (10) far away from the head body (23).
9. The direct built-in ultrasonic vibration assisted water jet head according to claim 8, characterized in that a first sealing assembly (12) is provided between the high pressure water input joint (11) and the vibrator mounting body (10).
10. The direct built-in ultrasonic vibration assisted waterjet nozzle according to claim 8, wherein a second sealing assembly (18) is provided between the vibrator mounting body (10) and the nozzle body (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111318215.4A CN113997211A (en) | 2021-11-09 | 2021-11-09 | Direct built-in ultrasonic vibration assisted water jet nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111318215.4A CN113997211A (en) | 2021-11-09 | 2021-11-09 | Direct built-in ultrasonic vibration assisted water jet nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113997211A true CN113997211A (en) | 2022-02-01 |
Family
ID=79928297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111318215.4A Pending CN113997211A (en) | 2021-11-09 | 2021-11-09 | Direct built-in ultrasonic vibration assisted water jet nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113997211A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086977A (en) * | 2021-11-09 | 2022-02-25 | 中铁工程装备集团有限公司 | Water jet nozzle with built-in packaged ultrasonic vibration assistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189058A (en) * | 2011-05-26 | 2011-09-21 | 任保林 | Middle-feeding ultrasonic powerful resonance pulsed jet spray head device |
| CN102493768A (en) * | 2011-12-02 | 2012-06-13 | 东北石油大学 | High-frequency pulsed jet flow resonance well drilling device and well drilling method thereof |
| CN209212241U (en) * | 2018-11-15 | 2019-08-06 | 江西蓝翔重工有限公司 | The drill loader group of tape cable reel on a kind of transport groove body |
| CN112157596A (en) * | 2020-09-10 | 2021-01-01 | 太原理工大学 | Acoustic-magnetic coupling cavitation auxiliary liquid jet polishing device and using method thereof |
| WO2021010535A1 (en) * | 2019-07-18 | 2021-01-21 | 단국대학교 산학협력단 | Underwater ultrasonic peening device |
| CN112282777A (en) * | 2020-11-19 | 2021-01-29 | 陈平 | Strong eddy pulse jet system for shield machine |
-
2021
- 2021-11-09 CN CN202111318215.4A patent/CN113997211A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189058A (en) * | 2011-05-26 | 2011-09-21 | 任保林 | Middle-feeding ultrasonic powerful resonance pulsed jet spray head device |
| CN102493768A (en) * | 2011-12-02 | 2012-06-13 | 东北石油大学 | High-frequency pulsed jet flow resonance well drilling device and well drilling method thereof |
| CN209212241U (en) * | 2018-11-15 | 2019-08-06 | 江西蓝翔重工有限公司 | The drill loader group of tape cable reel on a kind of transport groove body |
| WO2021010535A1 (en) * | 2019-07-18 | 2021-01-21 | 단국대학교 산학협력단 | Underwater ultrasonic peening device |
| CN112157596A (en) * | 2020-09-10 | 2021-01-01 | 太原理工大学 | Acoustic-magnetic coupling cavitation auxiliary liquid jet polishing device and using method thereof |
| CN112282777A (en) * | 2020-11-19 | 2021-01-29 | 陈平 | Strong eddy pulse jet system for shield machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086977A (en) * | 2021-11-09 | 2022-02-25 | 中铁工程装备集团有限公司 | Water jet nozzle with built-in packaged ultrasonic vibration assistance |
| CN114086977B (en) * | 2021-11-09 | 2024-04-26 | 中铁工程装备集团有限公司 | Water jet nozzle assisted by encapsulated built-in ultrasonic vibration |
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Application publication date: 20220201 |
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