CN110125814B - Continuous automatic abrasive feeding device with stable voltage and stable flow - Google Patents
Continuous automatic abrasive feeding device with stable voltage and stable flow Download PDFInfo
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- CN110125814B CN110125814B CN201910467972.4A CN201910467972A CN110125814B CN 110125814 B CN110125814 B CN 110125814B CN 201910467972 A CN201910467972 A CN 201910467972A CN 110125814 B CN110125814 B CN 110125814B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
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- 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
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a constant-pressure and constant-flow continuous and automatic abrasive material supply device, which comprises a control module, a double-spherical high-pressure abrasive material tank, a high-pressure water pipeline, a low-pressure water pipeline, a feeding pipeline, an abrasive material water jet pipeline, valves and sensors, wherein the valves and the sensors are arranged on the pipelines, a valve seat of the double-spherical abrasive material tank is connected with the feeding pipeline, the high-pressure water pipeline and the low-pressure water pipeline, a water pump is connected with all functional devices through the high-pressure pipeline, an overflow valve, a main path proportional flow valve, a bypass proportional flow valve, a pneumatic ball valve and a high-pressure ball valve are arranged in the pipelines, and. The device realizes pure water jet flow and continuous and automatic abrasive water jet flow operation through on-off combination of the system valve, and simultaneously can stabilize pressure and flow, and also can realize automatic adjustment of abrasive concentration and overpressure alarm through cooperative matching of various sensors, energy accumulators and flow valves connected to the control module. The device has high safety and simple operation, and can be widely applied.
Description
Technical Field
The invention belongs to the field of mechanical abrasive jet, and particularly relates to an abrasive water jet continuous automatic operation device.
Background
The water jet technology is a new technology developed recently, has wide industrial application and can be used for jet cutting, rock drilling, material surface cleaning, drilling exploitation and the like. Because the pressure required by the pure water jet flow for realizing industrial application is too high, the requirement on a pump is too high, and the pure water jet flow is difficult to popularize and use, students develop an abrasive water jet technology, and the solid-liquid two-phase medium jet flow has a good cutting effect and can be popularized and used. The abrasive jet technology can be divided into a front mixed abrasive jet and a rear mixed abrasive jet due to different mixing modes. The rear mixed abrasive jet flow is not uniform enough due to the fact that the abrasive and water are mixed, the abrasive is difficult to sufficiently accelerate, the jet flow easily sucks air to cause the cutting capacity to be greatly reduced, the cutting can be effectively carried out usually under the pressure of more than 200MPa, the requirement on pump pressure is increased, and the front mixed abrasive jet flow can better solve the problem. The pre-mixed abrasive jet is fully mixed in a high-pressure pipeline in advance and then is ejected out through a nozzle in an accelerating way, and the rock material can be well cut under the pressure of only 20-30 MPa.
In industrial application, although the pre-mixing abrasive jet technology has a good effect, the further development of the abrasive jet technology is limited by a plurality of problems that the existing equipment cannot continuously and automatically feed materials, or a system is too large and complicated, or a safety early warning device is not provided, and the final concentration cannot be adjusted. For example, patent No. CN103100984B discloses an automatic abrasive feeding device and a using method thereof, which can realize automatic abrasive feeding, but cannot realize continuous operation because the jet flow needs to be stopped to start adding the abrasive after the abrasive in the tank is exhausted. Patent No. CN104552027B invention discloses a continuous feeding system device of pre-mixed abrasive jet, which can realize continuous feeding of abrasive but cannot realize abrasive concentration adjustment, adopts the principle of a plurality of pump units using piston cylinders to continuously feed, and has the disadvantages of complex structure, high equipment cost and difficult popularization.
Therefore, aiming at the defects of the existing front mixed abrasive jet device, the invention provides the abrasive jet device capable of continuously, automatically and safely operating in a stable-pressure and stable-flow manner, and has important significance.
Disclosure of Invention
In order to solve the problems, the invention designs a voltage-stabilizing and current-stabilizing continuous and automatic abrasive feeding system, which can realize automatic abrasive feeding and continuous operation, can realize the functions of automatic abrasive concentration adjustment, overpressure alarm automatic shutdown and the like, and solves the problem that the traditional front mixed abrasive jet system cannot automatically adjust the abrasive concentration under the state of voltage stabilization and current stabilization and can continuously and safely operate.
The technical scheme of the invention is as follows:
a constant-pressure and-flow continuous and automatic abrasive material supply device comprises a high-pressure abrasive material tank, a high-pressure water pipeline, a low-pressure water pipeline, a feeding pipeline, an abrasive material water jet pipeline, valves and sensors, wherein the valves and the sensors are arranged on the pipelines.
The high-pressure abrasive tanks are spherical double tanks, the two spherical high-pressure abrasive tanks are connected in parallel, a feeding pipeline, a high-pressure water pipeline and a low-pressure water pipeline are respectively connected through respective valve seats at the upper parts of the tanks, outlet pipelines at the bottoms of the two tanks are converged and then connected with a mixing cavity, pneumatic ball valves are respectively arranged on the outlet pipelines, and the mixing cavity is connected with a nozzle through an abrasive water jet pipeline; two spherical high-pressure abrasive tanks, one for feed and one for feed, are freely switched by a valve.
The high pressure water pipeline passes through the water pump and connects the water source, and the water pump exit sets up the energy storage ware, and the water under high pressure divides into two branches after passing through the energy storage ware, and one branch road directly links to each other with the hybrid chamber, and another branch road divide into two the tunnel again, links to each other with two spherical high pressure abrasive material jars after connecting pneumatic ball valve respectively to connect bypass proportion flow valve on this branch road.
The feeding pipeline is connected with a water source through a water pump, a main pipeline of the feeding pipeline is connected with a jet pump and then divided into two branches which are respectively connected with the two spherical high-pressure abrasive tanks, the jet pump is connected with an abrasive hopper, and the abrasive in the abrasive hopper is sucked through negative pressure to continuously feed the two spherical high-pressure abrasive tanks; the charging pipeline is provided with three pneumatic ball valves on the main pipeline and the branch pipelines respectively.
The low-pressure water pipelines are respectively connected out from valve seats of the two spherical high-pressure grinding tanks, the high-pressure ball valves are arranged, and the outlets of the pipelines are connected to a water pool.
And the abrasive water jet pipeline is provided with a pressure sensor, a main path proportional flow valve and an ultrasonic concentration detector, and the outlet of the pipeline is connected with a nozzle.
The pressure sensor and the ultrasonic concentration detector are connected to the control module through signal transmission lines, the control module is connected to the main path proportional flow valve and the bypass proportional flow valve arranged on the high-pressure water pipeline through the signal transmission lines, concentration data of the ultrasonic concentration detector are transmitted back to the control module, and the control module controls the opening degree of the main path proportional flow valve and the bypass proportional flow valve to achieve automatic abrasive concentration adjustment control.
The device is provided with a red and yellow signal lamp and a buzzer alarm device, and realizes overpressure alarm and single-tank abrasive material exhaustion early warning.
The device realizes the voltage and current stabilization through an energy accumulator and two spherical high-pressure grinding tanks on a high-pressure pipeline; the continuous and automatic supplied abrasive water jet and pure water jet operation is realized by adjusting the on-off combination of a plurality of pneumatic ball valves on a pipeline, a main path proportional flow valve and a bypass proportional flow valve.
The invention has the advantages that:
according to the invention, the high-pressure abrasive tank is in a spherical design, the spherical tank can be formed at one time, the volume is larger, the pressure resistance is stronger compared with the traditional tank body, and the design of the double-spherical high-pressure abrasive tank is adopted, so that the pressure resistance of the abrasive tank is improved while the continuous uninterrupted operation of a system is realized, and the safety and the stability of long-term work are ensured.
2. The invention solves the problem of jet pulse of the traditional jet device, realizes the stable pressure and stable flow operation by arranging the energy accumulator to be matched with the high-pressure abrasive tank, and ensures the stable operation of abrasive jet.
3. The invention solves the problem that the abrasive jet flow concentration is difficult to control, the concentration data of the ultrasonic concentration detector in the pipeline is transmitted back to the control module, the control module controls the opening and closing degree of the main path proportional flow valve and the bypass proportional flow valve to realize the automatic abrasive concentration adjusting function, and the abrasive jet flow operation under multiple concentrations can be carried out.
4. The invention solves the problem of low safety of the traditional device, pressure data are transmitted back to the control module in real time through the pressure sensor on the high-pressure pipeline, the control module analyzes the pressure, when the pipeline has overpressure, the indicator lamp on the control module changes from a yellow lamp which normally works to a red lamp, the buzzer sounds to give an alarm, the system is automatically stopped, the safety early warning under long-time operation can be ensured, and the safety operation is ensured.
Drawings
FIG. 1 is an overall structural view of the present invention
In fig. 1, a nozzle 1 (jet outlet), an ultrasonic detector 2, a main path proportional flow valve 3, a pressure sensor 4, an abrasive water jet pipeline 5, a fifth pneumatic ball valve 6, a mixing chamber 7, a first overflow valve 8, a water tank 9, a second high-pressure water inlet 10, a second water pump 11, a second overflow valve 12, a first high-pressure water inlet 13, a first water pump 14, an accumulator 15, a high-pressure water main pipeline 16, a water tank 17, a low-pressure water pipeline 18, a low-pressure water pipeline 19, a first high-pressure ball valve 20, a second high-pressure ball valve 21, a high-pressure water pipeline 22, a bypass proportional flow valve 23, a valve seat 24, a third pneumatic ball valve 25, a fourth pneumatic ball valve 26, a sixth pneumatic ball valve 27, a first feeding pipeline 28, a second feeding pipeline 29, an abrasive hopper 30, a seventh pneumatic ball valve 31, a jet pump 32, a first pneumatic ball valve 33, a second pneumatic ball valve 34, a first high-pressure tank 35, an abrasive, A second high pressure abrasive tank 36.
Detailed Description
The invention is further illustrated with reference to fig. 1.
Referring to fig. 1, the invention relates to a constant-pressure and constant-flow continuous and automatic abrasive supply early warning device, which mainly comprises a high-pressure abrasive tank, a high-pressure water pipeline, a low-pressure water pipeline, a feeding pipeline, an abrasive water jet pipeline 5, valves and sensors arranged on the pipelines, and a controller.
The high-pressure abrasive tank is spherical two jars, two spherical high-pressure abrasive tanks are first spherical high-pressure abrasive tank 35 and the spherical high-pressure abrasive tank 36 of second promptly, and valve seat 24 is equipped with on the upper portion of jar, and the valve seat is connected feeding line, high pressure water pipe way and low pressure water pipeline respectively, sets up first and second high pressure ball valve 20, 21 on the low pressure water pipeline, and the pipeline exit linkage is to pond 17.
The first spherical high-pressure abrasive tank 35 and the second spherical high-pressure abrasive tank 36 are connected with the mixing cavity 7 through the first pneumatic ball valve 33 and the second pneumatic ball valve 34 on the pipelines, the mixing cavity 7 is connected with the abrasive water jet pipeline 5, the abrasive water jet pipeline 5 is provided with a pressure sensor 4, a main path proportional flow valve 3 and an ultrasonic concentration detector 2, and the outlet of the pipeline is connected with the nozzle 1.
On the high-pressure water pipeline, an energy accumulator 15 is arranged at the outlet of the first water pump 14, the high-pressure water pipeline is divided into two branches after passing through the energy accumulator 15, one branch is directly connected with the mixing cavity 7, and the other branch is connected with the double-spherical high-pressure grinding material tank through a third pneumatic ball valve 25 and a fourth pneumatic ball valve 26.
On the bottom pressure water pipeline, the low pressure water pipeline is respectively connected out from the valve seats of the two spherical high-pressure abrasive tanks, a first high-pressure ball valve 20 and a second high-pressure ball valve 21 are arranged on the low pressure water pipeline, and the outlet of the pipeline is connected to the water pool 17. In the feeding process of the abrasive tank, mixed fluid for rolling up and absorbing abrasive materials enters the abrasive tank, the abrasive materials are settled and gathered, and redundant water overflows and flows out from a low-pressure water pipeline, so that the drainage effect is achieved, and the feeding process of the abrasive tank is realized.
In this device, the water source of high-pressure water pipeline and feeding pipeline is same pond 9, and second and first water pump 11, 14 are supplied water by same pond 9, and are connected with first and second overflow valve 8, 12 respectively, and the pressure regulating effect can be played through adjusting the overflow valve on the one hand to the system during operation for set system pressure, and on the other hand can play the safety protection effect, and system pressure opens the overflow when exceeding set pressure, carries out overload protection.
The controller of the device is connected with the pressure sensor 4, the ultrasonic concentration detector 2, the main path proportional flow valve 3, the bypass proportional flow valve 23 and other valves through signal transmission lines, concentration data of the ultrasonic concentration detector is transmitted back to the control module, and the control module controls the opening degree of the main path proportional flow valve and the bypass proportional flow valve to realize automatic adjustment and control of the abrasive concentration.
The device also comprises an alarm device which comprises a red and yellow signal lamp and a buzzer, and can realize overpressure alarm and single-tank abrasive material exhaustion early warning, the control module analyzes pressure through pressure data returned by the pressure sensor 4 on the high-pressure pipeline in real time, and when the pipeline is in overpressure, the red and yellow signal lamp and the buzzer alarm device are controlled to alarm, and the system is automatically stopped. Meanwhile, when the ultrasonic concentration detector 2 arranged on the water jet pipeline detects that the concentration of the jet abrasive is 0, the abrasive in the working abrasive tank is exhausted, and the control module carries out single-tank abrasive exhaustion early warning after receiving the jet abrasive concentration data.
The abrasive water jet and pure water jet operation of continuous automatic supply can be realized through the combination of the on-off of a plurality of pneumatic ball valves, high-pressure ball valves, a main path proportional flow valve 3 and a bypass proportional flow valve 23 on an adjusting pipeline, and the operation process is as follows:
1. continuous abrasive water jet operation: the third, second, fifth and seventh pneumatic ball valves 25, 34, 6 and 31 are opened, the fourth, first and sixth pneumatic ball valves 26, 33 and 27 are closed, the first high-pressure ball valve 20 is closed, the second high-pressure ball valve 21 is opened, high-pressure water enters the energy accumulator 15 through the first high-pressure water inlet 13 and then is divided into two branches, one branch enters the second spherical high-pressure abrasive tank 36 through the bypass proportional flow valve 23 and the third pneumatic ball valve 25, and the other branch is mixed with abrasive flowing out of the second spherical high-pressure abrasive tank 36 through the second pneumatic ball valve 34 through the mixing cavity 7 and then is sprayed out of the nozzle 1. Meanwhile, the second high-pressure water inlet 10 enters the jet pump 32 through the fifth pneumatic ball valve 6 and sucks the abrasives in the grinding hopper 30, the high-pressure water mixed with the abrasives enters the first spherical high-pressure grinding tank 35 through the seventh pneumatic ball valve 31 to be precipitated, the overflowing water flows into the water tank 17 through the second high-pressure ball valve 21, and the other grinding tank is switched to continue working after the abrasives in the single tank are exhausted.
2. Pure water jet operation: the third, fourth, first and second pneumatic ball valves 25, 26, 33, 34 are closed, the second water pump 11 is closed, the first water pump 14 is started, flows through the energy accumulator 15 via the first high-pressure water inlet 13, enters the abrasive water jet line 5 via the mixing chamber 7, and finally is ejected at the nozzle 1.
The device realizes the operation of pure water jet and continuous and automatic abrasive water jet through the on-off combination of the valve, and simultaneously, through the cooperative cooperation of each sensor, the energy accumulator and the flow valve which are connected to the control module, the device not only can stabilize the pressure and the flow, but also can realize the automatic adjustment of the abrasive concentration and the overpressure alarm. The device has the advantages of simple structure, capacity of alarming at overpressure, shutdown at overpressure, good safety, high automation degree, high safety, simplicity in operation, capability of meeting the actual engineering requirements and wide application.
In addition to the above embodiments, other embodiments of the present invention are also possible, and any technical implementation that uses equivalent substitutions is within the scope of the present invention.
Claims (4)
1. A constant-pressure and constant-flow continuous and automatic abrasive material supply device comprises a high-pressure abrasive material tank, a high-pressure water pipeline, a low-pressure water pipeline, a feeding pipeline, an abrasive material water jet pipeline, valves and sensors arranged on the pipelines, and a control module for controlling the device; the method is characterized in that:
the high-pressure grinding tanks are spherical double tanks, the two spherical high-pressure grinding tanks are connected in parallel and respectively comprise a first spherical high-pressure grinding tank (35) and a second spherical high-pressure grinding tank (36), the feeding pipeline, the high-pressure water pipeline and the low-pressure water pipeline are respectively connected through respective valve seats (24) on the upper parts of the tanks, the outlet pipelines on the bottoms of the two tanks are converged and then connected with a mixing cavity (7), the outlet pipelines are respectively provided with a first pneumatic ball valve (33) and a second pneumatic ball valve (34), and the mixing cavity (7) is connected with a nozzle through a grinding water jet pipeline; two spherical high-pressure grinding material tanks are used for feeding materials one by one, and switching is realized through a valve;
the high-pressure water pipeline is connected with a water source through a first water pump (14), an energy accumulator (15) is arranged at the outlet of the first water pump (14), the high-pressure water is divided into two branches after passing through the energy accumulator (15), one branch is directly connected with the mixing cavity (7), the other branch is divided into two branches, the two branches are respectively connected with a third pneumatic ball valve (25) and a fourth pneumatic ball valve (26) and then connected with two spherical high-pressure grinding tanks, and the branch is connected with a bypass proportional flow valve (23);
the feeding pipeline is connected with a water source through a second water pump (11), a main pipeline of the feeding pipeline is divided into a first branch (28) and a second branch (29) after being connected with a jet pump (32) and is respectively connected with the two spherical high-pressure abrasive tanks, the jet pump (32) is connected with an abrasive hopper (30), and the abrasive in the abrasive hopper is sucked through negative pressure to continuously feed the two spherical high-pressure abrasive tanks; the charging pipeline is provided with a fifth pneumatic ball valve, a sixth pneumatic ball valve and a seventh pneumatic ball valve (6, 27 and 31) on the main pipeline and the branch pipeline respectively;
the low-pressure water pipelines are respectively connected out of valve seats of the two spherical high-pressure grinding tanks, a first high-pressure ball valve (20) and a second high-pressure ball valve (21) are arranged, and the outlets of the pipelines are connected to a water pool;
the abrasive water jet pipeline (5) is provided with a pressure sensor (4), a main path proportional flow valve (3) and an ultrasonic concentration detector (2);
the control module is connected with the pressure sensor (4), the ultrasonic concentration detector (2), the main path proportional flow valve (3), the bypass proportional flow valve (23) and other valves through signal transmission lines, concentration data of the ultrasonic concentration detector are fed back to the control module, and the control module controls the opening degree of the main path proportional flow valve and the bypass proportional flow valve to realize automatic adjustment and control of the abrasive concentration; the control module is provided with a red and yellow signal lamp and a buzzer alarm device, pressure data are transmitted back to the control module in real time through a pressure sensor on the high-pressure pipeline, the control module analyzes the pressure, when the pipeline is in overpressure, the red and yellow signal lamp and the buzzer alarm device of the control module give an alarm, and the system is automatically stopped;
the device realizes the pressure and flow stabilization through an energy accumulator (15) on a high-pressure pipeline and two spherical high-pressure grinding tanks; the continuous and automatic supply of the abrasive water jet and the pure water jet work is realized by adjusting the on-off combination of a plurality of pneumatic ball valves on a pipeline, a main path proportional flow valve (3) and a bypass proportional flow valve (23).
2. A steady pressure and flow abrasive continuous automatic supply device according to claim 1, characterized in that the operating conditions of said device comprise:
(1) continuous abrasive water jet operation: opening third, second, fifth and seventh pneumatic ball valves (25, 34, 6, 31), closing fourth, first and sixth pneumatic ball valves (26, 33, 27), closing the first high-pressure ball valve (20), opening the second high-pressure ball valve (21), dividing the high-pressure water into two branches after entering the accumulator (15) through the first high-pressure water inlet (13), one branch entering the second spherical high-pressure abrasive tank (36) through the bypass proportional flow valve (23) and the third pneumatic ball valve (25), the other branch mixing the abrasive flowing out from the second spherical high-pressure abrasive tank (36) through the second pneumatic ball valve (34) through the mixing chamber (7), spraying out from the nozzle (1), meanwhile, entering the jet pump (32) through the fifth pneumatic ball valve (6) and sucking the abrasive in the abrasive hopper (30) through the second pneumatic ball valve (7), and allowing the high-pressure water mixed with the abrasive to enter the first spherical high-pressure ball valve (35) through the seventh pneumatic ball valve (31) for sedimentation, the overflowing water flows into the water pool through a low-pressure water pipeline;
(2) pure water jet operation: the third, fourth, first and second pneumatic ball valves (25, 26, 33, 34) are closed, the second water pump (11) is closed, the first water pump (14) is started, and the abrasive water jet enters the abrasive water jet pipeline (5) through the first high-pressure water inlet (13), flows through the energy accumulator (15) and the mixing cavity (7), and is finally sprayed out from the nozzle (1).
3. The device for continuously and automatically supplying abrasives in a stable pressure and stable flow according to claim 1 is characterized in that the water source is a same water tank (9), the first water pump (14) and the second water pump (11) are supplied with water from the same water tank (9), and the first overflow valve (8) and the second overflow valve (12) are respectively connected with the first water pump (14) and the second water pump (11).
4. The continuous and automatic abrasive material supply device with stable pressure and stable flow according to claim 1 is characterized in that an alarm device is further provided, the alarm device comprises a red and yellow signal lamp and a buzzer, overpressure alarm and single-tank abrasive material exhaustion early warning are realized, the control module analyzes pressure through pressure data fed back by a pressure sensor (4) on a high-pressure pipeline in real time, and when the pipeline is in overpressure, the alarm device is controlled to alarm, and a system is automatically stopped; meanwhile, when the ultrasonic concentration detector (2) arranged on the water jet pipeline detects that the concentration of the jet abrasive is 0, the control module carries out single-tank abrasive exhaustion early warning after receiving the jet abrasive concentration data.
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| CN113276027B (en) * | 2021-06-24 | 2023-03-28 | 中国铁建重工集团股份有限公司 | Abrasive jet control system |
| CN114217579A (en) * | 2021-11-30 | 2022-03-22 | 武汉大学 | System and method for dynamically adjusting high polymer for grinding steel rail by abrasive water jet |
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| CN114700880B (en) * | 2022-03-24 | 2024-03-26 | 重庆大学 | Abrasive mass concentration detection system and method for abrasive jet equipment |
| CN114750075B (en) * | 2022-04-08 | 2023-08-18 | 中铁第四勘察设计院集团有限公司 | High-pressure abrasive water jet steel rail polishing water quality detection circulating system and method |
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