CN110000929B - Ultra-high power and ultra-high voltage system - Google Patents
Ultra-high power and ultra-high voltage system Download PDFInfo
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- CN110000929B CN110000929B CN201910349308.XA CN201910349308A CN110000929B CN 110000929 B CN110000929 B CN 110000929B CN 201910349308 A CN201910349308 A CN 201910349308A CN 110000929 B CN110000929 B CN 110000929B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
-
- 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
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides an ultra-high power ultra-high pressure system, it includes base (21), installs water tank (22), water pump (23) and control electric cabinet (24) on base (21), the water inlet of water pump links to each other with the delivery port of water tank, characterized by the delivery port of water pump (23) divide the multichannel and be linked together with the water inlet of each high-pressure pump (25) of installing on base (21), high-pressure pump (25) are driven by respective motor (26), the water outlet end of each high-pressure pump (25) is sent into in water outlet switching (28) through high-pressure pipe (27), water outlet switching (28) are continuous with ultra-high pressure large-flow rotary joint's high-pressure water inlet (10) through high-pressure pipeline again. The total power of the invention reaches 640kW; the highest pressure reaches 300MPa, the pressure of each pump in the group is automatically followed by the pressure of the pump with one-time set pressure; the system has continuous self-adaptive voltage stabilization control function, so that the system can be set by one key in operation and work is stable; the ultra-high pressure pump system has the safety protection functions of overvoltage protection, undervoltage alarm, unstability automatic stop protection and the like.
Description
Technical Field
The invention relates to a water jet technology, in particular to a large-scale water jet system, and specifically relates to an ultra-high power and ultra-high pressure system.
Background
The ultrahigh pressure system is an important component of the ultrahigh pressure water cutting machine and is used for providing continuous high pressure water with stable pressure for the cutting machine. No ultra-high-power ultra-high-voltage system product exists at home and abroad at present, and the maximum power of the ultra-high-voltage system is 200kW according to the queried data. In some specific applications (such as mining, rock breaking, stone exploitation, etc.), ultra-high-power ultra-high-voltage systems are urgently needed to meet the need for shortening engineering construction cycles. The ultra-high power ultra-high pressure system is applied to high-flow water jet equipment, and utilizes the impact kinetic energy of jet flow to rapidly cut and crush rock. The development of the ultra-high power and ultra-high voltage system leads the equipment level of China in the field to reach international leading.
Disclosure of Invention
The invention aims to design an ultra-high power ultra-high pressure system with the maximum power up to 640 kW and the maximum pressure up to more than 300MPa aiming at the problems that the power of the existing ultra-high pressure water cutting system cannot meet the requirements of the fields of mining, rock breaking, stone exploitation and the like, thereby influencing the application of the ultra-high pressure water cutting system in the fields.
The technical scheme of the invention is as follows:
The ultra-high power ultra-high pressure system comprises a base 21, wherein a water tank 22, a water pump 23 and a control electric cabinet 24 are arranged on the base 21, and a water inlet of the water pump is connected with a water outlet of the water tank, and is characterized in that a water outlet of the water pump 23 is in multiplexing connection with a water inlet of each high-pressure pump 25 arranged on the base 21, the high-pressure pumps 25 are driven by respective motors 26, water outlet ends of the high-pressure pumps 25 are sent into a water outlet switching 28 through high-pressure pipes 27, and the water outlet switching 28 is connected with a high-pressure water inlet interface 10 of an ultra-high pressure high-flow rotary joint through high-pressure pipelines.
The number of the high-pressure pumps 25 is four, the total power is 640kW, the highest pressure reaches 300MPa, the output pressure is adjustable, and the pressure of each high-pressure pump is automatically followed.
The water outlet end of the high-pressure pump 25 is provided with a stop valve 29, the stop valve is in an open state before the motor is started, and the output water of the high-pressure pump is discharged through the stop valve, so that the motor is ensured to be started under light load, and when the motor is started and normally operates, the stop valve is closed to enter a supercharging output state.
At least one motor of the motors 26 is connected with a frequency converter, the water outlet end of a high-pressure pump 25 connected with the motor is connected with a pressure transmitter 30, the rotating speed of the motor can be adjusted under the control of the frequency converter, and the purposes of adjusting the flow and the pressure of the system are achieved by adjusting the rotating speed of the motor; the pressure transmitter is used for detecting the pressure of the output water of the high-pressure pump in real time; the combined application of the pressure transmitter and the frequency converter realizes the control of the system pressure: when the pressure of the high-pressure system is lower than a set value, the frequency converter controls the motor to rotate at a higher speed; when the pressure of the high-pressure system is higher than a set value, the frequency converter controls the motor to rotate at a low speed, so that the control of the output water pressure of the high-pressure system is realized.
Each motor 26 is controlled by a respective motor control cabinet 31.
The ultrahigh-pressure high-flow rotary joint comprises a mounting seat 8 and a connecting plate 2, wherein a plurality of high-pressure water inlet interfaces 10 are arranged on the mounting seat 8, a plurality of high-pressure water outlet interfaces 11 are arranged on the connecting plate 2, each high-pressure water inlet interface 10 is communicated with a high-pressure water converging and distributing hole 12 in the center of a rotary shaft 5 after being converged by an internal through hole, the connecting plate 2 is arranged on the rotary shaft 5, and each high-pressure water outlet interface 11 on the connecting plate 2 is communicated with the high-pressure water converging and distributing hole 12 by the internal through hole and a radial through hole on the rotary shaft; the rotary shaft 5 is arranged in the shell 3 through the thrust bearing 4 and the angular contact ball bearing 6, the shell 3 is fixedly connected with the end face of the mounting seat 8, and the high-pressure sealing ring 9 is arranged at one end of the rotary shaft 5 inserted into the mounting seat 8 so as to ensure that high-pressure water collected from the mounting seat can completely enter the high-pressure water collecting and distributing hole 12 of the rotary shaft, and the water leakage at the shell is avoided.
The high-pressure water inlet ports 10 on the mounting seat 8 are symmetrically distributed on the mounting seat 8 to ensure stress balance, and the high-pressure water inlet ports 10 are connected with the high-pressure water input connector through threads.
The high-pressure water outlet ports 11 on the connecting plate 2 are symmetrically distributed on the connecting plate 2, and the high-pressure water outlet ports 11 are connected with the high-pressure water outlet joint through threads.
The shell 3 is arranged in one end close to the mounting seat 8 and on the rotating shaft 5, a supporting pad 7 is arranged, one end of the supporting heat 7 is propped against the high-pressure sealing ring 9 to realize the positioning of the supporting heat 7 on the rotating shaft, the other end is propped against the outer ring of the angular contact ball bearing 6, so that the positioning of one side of the angular contact ball bearing 6 is realized, and the other side of the angular contact ball bearing 6 is positioned by a boss in the shell.
The connecting plate 2 is sleeved on the rotating shaft 5 and is tightly positioned on the rotating shaft 5 through a hexagonal nut.
The invention has the beneficial effects that:
The total power of the ultra-high power and ultra-high voltage system reaches 640kW; the highest pressure reaches 300MPa, the pressure of each pump in the group is automatically followed by the pressure of the pump with one-time set pressure; the system has continuous self-adaptive voltage stabilization control function, so that the system can be set by one key in operation and work is stable; the ultra-high pressure pump system has the safety protection functions of overvoltage protection, undervoltage alarm, unstability automatic stop protection and the like.
The ultrahigh-pressure high-flow rotary joint adopts a structure of multiple inlets and multiple outlets, has the highest pressure of 300MPa and the flow of 150lpm, has the characteristics of small volume, simple structure, high reliability and the like, and meets the conveying requirement of high-pressure water in high-flow ultrahigh-pressure water jet equipment.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of an ultrahigh pressure high flow rotary joint according to an embodiment of the invention.
Fig. 3 is a schematic view of the water outlet switching structure of the present invention. FIG. 3 (a) is a front view of water transfer; fig. 3 (B) is a B-B cross-sectional view of fig. 3 (a), and fig. 3 (c) is an a-view of fig. 3 (a).
In the figure: 32 is a housing, 33 is a heat exchanger, 34 is an oil filter, 35 is a tray, and 36 is a bracket.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1-3.
The ultra-high power ultra-high pressure system comprises a base 21, wherein a water tank 22, a water pump 23 and a control electric cabinet 24 are arranged on the base 21, a water inlet of the water pump is connected with a water outlet of the water tank, a water outlet of the water pump 23 is divided into multiple paths (four paths in the figure 1) and is communicated with water inlets of high-pressure pumps 25 arranged on the base 21, the high-pressure pumps 25 are driven by respective motors 26, water outlet ends of the high-pressure pumps 25 are sent into a water outlet switching 28 through high-pressure pipes 27 (as shown in figure 3, the system can be designed and manufactured by self in specific implementation), and each path of output of the water outlet switching 28 is connected with high-pressure water inlet interfaces 10 corresponding to ultra-high-pressure high-flow rotary joints 37 through high-pressure pipelines (as shown in figure 2, the number of the high-pressure water inlet interfaces is four). The total power of the ultrahigh pressure system is 640kW, the highest pressure can reach 300MPa, the output pressure is adjustable, and the pressure of each high pressure pump is automatically followed. As shown in fig. 1, a stop valve 29 is installed at the water outlet end of the high-pressure pump 25, and before the motor is started, the stop valve is in an open state, and the output water of the high-pressure pump is discharged through the stop valve, so as to ensure that the motor is started under light load, and when the motor is started and runs normally, the stop valve is closed, and the motor enters a supercharging output state. At least one motor of the motors 26 is connected with a frequency converter, the water outlet end of a high-pressure pump 25 connected with the motor is connected with a pressure transmitter 30, the rotating speed of the motor can be adjusted under the control of the frequency converter, and the purposes of adjusting the flow and the pressure of the system are achieved by adjusting the rotating speed of the motor; the pressure transmitter is used for detecting the pressure of the output water of the high-pressure pump in real time; the combined application of the pressure transmitter and the frequency converter realizes the control of the system pressure: when the pressure of the high-pressure system is lower than a set value, the frequency converter controls the motor to rotate at a higher speed; when the pressure of the high-pressure system is higher than a set value, the frequency converter controls the motor to rotate at a low speed, so that the control of the output water pressure of the high-pressure system is realized. Each motor 26 is controlled by a respective motor control cabinet 31. As shown in fig. 1. As for the installation and configuration modes of the motor 26, the high-pressure pump 25 and the motor control cabinet 31 of the invention, the installation and configuration modes can be configured by themselves according to the field conditions, and all the components in fig. 2 are arranged in parallel in a straight line, of course, the components can also be arranged side by side, and in order to save space, a bracket 36 and a tray 35 are additionally arranged in fig. 1 for installing the high-pressure pump.
In addition, in the implementation, the ultrahigh pressure high-flow rotary joint 37 which is one of key components of system output can be designed and manufactured by itself, can be ordered from market directly, can also adopt the structure shown in fig. 2, in the ultrahigh pressure high-flow rotary joint shown in fig. 2, the ultrahigh pressure high-flow rotary joint comprises a mounting seat 8 and a connecting plate 2, a plurality of high-pressure water inlet ports 10 are arranged on the mounting seat 8, a plurality of high-pressure water outlet ports 11 are arranged on the connecting plate 2, each high-pressure water inlet port 10 is communicated with a high-pressure water converging and distributing hole 12 in the center of a rotating shaft 5 after being converged through an internal through hole, the connecting plate 2 is arranged on the rotating shaft 5, and each high-pressure water outlet port 11 on the connecting plate 2 is communicated with the high-pressure water converging and distributing hole 12 through the internal through holes and radial through holes on the rotating shaft; the rotary shaft 5 is arranged in the shell 3 through the thrust bearing 4 and the angular contact ball bearing 6, the shell 3 is fixedly connected with the end face of the mounting seat 8, and the high-pressure sealing ring 9 is arranged at one end of the rotary shaft 5 inserted into the mounting seat 8 so as to ensure that high-pressure water collected from the mounting seat can completely enter the high-pressure water collecting and distributing hole 12 of the rotary shaft, and the water leakage at the shell is avoided. The high-pressure water inlet ports 10 on the mounting seat 8 are symmetrically distributed on the mounting seat 3 to ensure stress balance, and the high-pressure water inlet ports 10 are connected with the high-pressure water input connector through threads. The high-pressure water outlet ports 11 on the connecting plate 2 are symmetrically distributed on the connecting plate 2, and the high-pressure water outlet ports 11 are connected with the high-pressure water outlet joint through threads. The shell 3 is arranged in one end close to the mounting seat 8 and on the rotating shaft 5, a supporting pad 7 is arranged, one end of the supporting heat 7 is propped against the high-pressure sealing ring 9 to realize the positioning of the supporting heat 7 on the rotating shaft, the other end is propped against the outer ring of the angular contact ball bearing 6, so that the positioning of one side of the angular contact ball bearing 6 is realized, and the other side of the angular contact ball bearing 6 is positioned by a boss in the shell. The connecting plate 2 is sleeved on the rotating shaft 5 and is tightly positioned on the rotating shaft 5 through a hexagonal nut.
The working principle of the ultra-high power high-pressure system and the ultra-high pressure high-flow rotary joint is as follows:
The ultra-high power and ultra-high pressure system mainly comprises a base, a motor, a high-pressure pump, a stop valve, a pressure transmitter, a high-pressure pipe, a water outlet switching part, a water tank, a water pump, an electric cabinet and the like. The water in the water tank is pressurized by the water pump and then is conveyed to the water inlet end of the high-pressure pump, the motor drives the high-pressure pump to rotate, and the high-pressure water pressurized by the high-pressure pump is output from the water outlet end of the high-pressure pump and is conveyed to the water outlet switching position through the high-pressure pipe; the stop valve is arranged at the water outlet end of the high-pressure pump in parallel, the stop valve is in an open state before the motor is started, and the output water of the high-pressure pump is discharged through the stop valve, so that the motor is ensured to be started under light load, and the stop valve is closed when the motor is normally operated after being started; in the four groups of high-pressure pump motor groups shown in the figure, one set of motors is connected with a frequency converter, the rotating speed of the motors can be adjusted under the control of the frequency converter, and the purposes of adjusting the flow and the pressure of the system are achieved by adjusting the rotating speed of the motors; the pressure transmitter is also arranged at the water outlet end of the high-pressure pump in parallel and used for detecting the pressure of the output water of the high-pressure pump in real time; the combined application of the pressure transmitter and the frequency converter realizes the control of the system pressure: when the pressure of the high-pressure system is lower than a set value, the frequency converter controls the motor to rotate at a higher speed; when the pressure of the high-pressure system is higher than a set value, the frequency converter controls the motor to rotate at a low speed, so that the control of the output water pressure of the high-pressure system is realized. (compared with the existing mode of adjusting the output water pressure by adopting the overflow valve, the ultrahigh pressure system adopting the frequency converter to control the rotating speed of the motor to adjust the output water pressure cancels the high-pressure overflow valve, avoids the phenomenon of high-pressure water overflow, can save the consumption of electric energy, and simultaneously reduces the consumption of wearing parts generated by the high-pressure overflow valve and the downtime generated by replacing the wearing parts of the high-pressure overflow valve).
The mounting seat 8 of the ultrahigh-pressure high-flow rotary joint is an input end of multiple paths of high-pressure water, and a plurality of internal threaded holes are distributed on the circumference of the large outer circle of the mounting seat and are used for mounting an input pipeline joint (namely a high-pressure water input joint); the mounting seat 8 is fixedly mounted on the housing 3 by a screw (not shown); the center of the rotating shaft 5 is a cylindrical hole, and the thrust bearing 4 and the angular contact ball bearing 6 are sleeved on the outer circle of the rotating shaft 5; the thrust bearing 4 and the angular contact ball bearing 6 are arranged in an inner hole of the shell 3; the connecting plate 2 is a multi-path high-pressure water output end, and a plurality of internal threaded holes are also distributed on the circumference of the outer circle of the connecting plate and are used for installing output pipeline joints (namely high-pressure water output joints); the inner hole of the connecting plate 2 is sleeved on the outer circle at the left side of the rotating shaft 5 and is fixed by a hexagonal nut 1. The inner hole of the high-pressure sealing ring 9 is sleeved on the outer circle of the right end of the rotating shaft 5, the outer circle is sleeved in the inner hole of the left end of the mounting seat 8, and the left end of the high-pressure sealing ring 9 is propped against the supporting pad 7; the support pad 7 is installed in the right end inner hole of the shell 3, and the left end abuts against the angular contact ball bearing 7.
The high-pressure water enters a hole communicated with the internal threaded hole of the mounting seat 8 through an input high-pressure pipeline, is collected in the hole positioned in the center of the mounting seat 8, enters a hole of the connecting plate 2 fixedly connected with the rotary shaft 5 through the center hole of the rotary shaft 5, and finally enters an output pipeline arranged on the internal threaded hole of the connecting plate 2. When the rotation moment acts on the connecting plate 2, the connecting plate 2 drives the rotating shaft 5 to rotate together, so that the relative rotation of the output end and the input end in high-pressure water conveying is realized.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (8)
1. The ultra-high power ultra-high pressure system comprises a base (21), wherein a water tank (22), a water pump (23) and a control electric cabinet (24) are arranged on the base (21), and a water inlet of the water pump is connected with a water outlet of the water tank; at least one motor in the motors (26) is connected with a frequency converter, the water outlet end of a high-pressure pump (25) connected with the motor is connected with a pressure transmitter (30), the rotating speed of the motor can be adjusted under the control of the frequency converter, and the purposes of adjusting the flow and the pressure of the system are achieved by adjusting the rotating speed of the motor; the pressure transmitter is used for detecting the pressure of the output water of the high-pressure pump in real time; the combined application of the pressure transmitter and the frequency converter realizes the control of the system pressure: when the pressure of the high-pressure system is lower than a set value, the frequency converter controls the motor to rotate at a higher speed; when the pressure of the high-pressure system is higher than a set value, the frequency converter controls the motor to rotate at a low speed, so that the control of the output water pressure of the high-pressure system is realized; the ultrahigh pressure high-flow rotary joint (37) has the pressure of 300Mpa and the flow of 150lpm, the ultrahigh pressure high-flow rotary joint (37) comprises a mounting seat (8) and a connecting plate (2), a plurality of high-pressure water inlet interfaces (10) are arranged on the mounting seat (8), a plurality of high-pressure water outlet interfaces (11) are arranged on the connecting plate (2), each high-pressure water inlet interface (10) is communicated with a high-pressure water converging and distributing hole (12) in the center of the rotating shaft (5) after being converged through an internal through hole, the connecting plate (2) is arranged on the rotating shaft (5), and each high-pressure water outlet interface (11) on the connecting plate (2) is communicated with the high-pressure water converging and distributing hole (12) through an internal through hole and a radial through hole on the rotating shaft; the rotary shaft (5) is arranged in the shell (3) through the thrust bearing (4) and the angular contact ball bearing (6), the shell (3) is fixedly connected with the end face of the mounting seat (8), and the high-pressure sealing ring (9) is arranged at one end of the rotary shaft (5) inserted into the mounting seat (8) so as to ensure that high-pressure water collected from the mounting seat can completely enter the high-pressure water collecting and distributing hole (12) of the rotary shaft, and water leakage at the shell is avoided.
2. The ultra-high power and ultra-high pressure system according to claim 1, wherein the number of the high-pressure pumps (25) is four, the total power is 640kW, the maximum pressure is 300MPa, the output pressure is adjustable, and the pressure of each high-pressure pump is automatically followed.
3. The ultra-high power and ultra-high pressure system according to claim 1, wherein a stop valve (29) is installed at the water outlet end of the high-pressure pump (25), the stop valve is in an open state before the motor is started, and the output water of the high-pressure pump is discharged through the stop valve, so that the motor is ensured to be started under light load, and the stop valve is closed to enter a supercharging output state when the motor is normally operated after the motor is started.
4. The ultra-high power and ultra-high voltage system according to claim 1, wherein each motor (26) is controlled by a respective motor control cabinet (31).
5. The ultra-high power and ultra-high pressure system according to claim 1, wherein a plurality of high-pressure water inlet ports (10) on the mounting seat (8) are symmetrically distributed on the mounting seat (8) to ensure stress balance, and the high-pressure water inlet ports (10) are connected with the high-pressure water input joint through threads.
6. The ultra-high power and ultra-high pressure system according to claim 1, wherein the connecting plate (2) and the plurality of high-pressure water outlet interfaces (11) are symmetrically distributed on the connecting plate (2), and the high-pressure water outlet interfaces (11) are connected with the high-pressure water output connector through threads.
7. The ultra-high power and ultra-high pressure system according to claim 1, wherein a support pad (7) is installed on the rotating shaft (5) in one end of the shell (3) close to the installation seat (8), one end of the support pad (7) is abutted against the high-pressure sealing ring (9) to realize the positioning of the support pad on the rotating shaft, the other end of the support pad is abutted against the outer ring of the angular contact ball bearing (6) so as to realize the positioning of one side of the angular contact ball bearing (6), and the other side of the angular contact ball bearing (6) is positioned by a boss inside the shell.
8. The ultra-high power and ultra-high pressure system according to claim 1, wherein the connecting plate (2) is sleeved on the rotating shaft (5) and is tightly positioned on the rotating shaft (5) through a hexagonal nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349308.XA CN110000929B (en) | 2019-04-28 | 2019-04-28 | Ultra-high power and ultra-high voltage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349308.XA CN110000929B (en) | 2019-04-28 | 2019-04-28 | Ultra-high power and ultra-high voltage system |
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| CN110000929A CN110000929A (en) | 2019-07-12 |
| CN110000929B true CN110000929B (en) | 2024-05-10 |
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| CN201910349308.XA Active CN110000929B (en) | 2019-04-28 | 2019-04-28 | Ultra-high power and ultra-high voltage system |
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Families Citing this family (1)
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| CN110497534B (en) * | 2019-08-31 | 2022-02-08 | 中铁工程装备集团有限公司 | Rotary joint for ultrahigh-pressure water jet auxiliary rock breaking |
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| CN201218375Y (en) * | 2008-07-18 | 2009-04-08 | 佛山市南海力丰机床有限公司 | High-pressure rotating connector |
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| CN205781619U (en) * | 2016-05-24 | 2016-12-07 | 象山兴驰液压润滑有限公司 | A kind of threeway swivel joint |
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| CN108756923A (en) * | 2018-06-29 | 2018-11-06 | 中铁工程装备集团有限公司 | A kind of development machine using high pressure water broken rock |
| CN210161425U (en) * | 2019-04-28 | 2020-03-20 | 南京大地水刀股份有限公司 | Ultrahigh-power ultrahigh-pressure system |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690325A (en) * | 1986-09-17 | 1987-09-01 | Butterworth Jetting Systems, Inc. | High pressure fluid delivery system |
| CN2206889Y (en) * | 1994-07-14 | 1995-09-06 | 焦作矿业学院 | 12 MPa high-pressure water or serous rotary joint |
| CN201218375Y (en) * | 2008-07-18 | 2009-04-08 | 佛山市南海力丰机床有限公司 | High-pressure rotating connector |
| CN203414746U (en) * | 2013-08-05 | 2014-01-29 | 刘四海 | Constant-flow intelligent power-saving protection and control system based on six water pumps |
| CN205781619U (en) * | 2016-05-24 | 2016-12-07 | 象山兴驰液压润滑有限公司 | A kind of threeway swivel joint |
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| CN108480269A (en) * | 2018-02-26 | 2018-09-04 | 合肥通用机械研究院有限公司 | A kind of multifunctional high pressure water jet flusher |
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| CN210161425U (en) * | 2019-04-28 | 2020-03-20 | 南京大地水刀股份有限公司 | Ultrahigh-power ultrahigh-pressure system |
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| CN110000929A (en) | 2019-07-12 |
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