Slurry abrasive jet generating system and method

Abstract

The invention relates to a slurry abrasive jet generating system and method. The slurry abrasive jet generating system comprises a storage tank, a jet peristaltic pump, a spray head, a collecting water tank and a screening device. The storage tank, the jet peristaltic pump and the spray head are sequentially connected through a pipeline; the collecting water tank is arranged below the spray head and is used for collecting abrasive slurry sprayed by the spray head; the screening device is used for collecting abrasive slurry from the water tank through a pipeline, and after the abrasive slurry is screened and filtered in the screening device, the abrasive slurry is conveyed to the storage tank; the storage tank is used for storing abrasive slurry for the spray head to spray out the abrasive slurry; the spray head is used for spraying abrasive slurry to cut an object; and the jet peristaltic pump is used for providing power for the spray head, pressurizing the abrasive slurry in the storage tank and then conveying the pressurized abrasive slurry to the spray head. According to the scheme, efficient screening and cyclic utilization of grinding materials are achieved through multi-stage cooperation.

Description

Technical Field

[0001] The present invention relates to the technical field of abrasive water jet, and particularly to a slurry abrasive jet generating system and method. Background Art

[0002] During the use of existing abrasive water jet cutting machines, the abrasive is usually used only once. This method not only causes a large amount of consumption of the abrasive, but also brings significant economic losses. Due to the high cost of the abrasive, frequent replacement and waste put enterprises under great economic pressure, and also impose a burden on the environment. In order to effectively recycle the used abrasive, it must be reasonably screened and recycled. This requires a set of efficient screening devices that can process the used wet abrasive, separate the abrasive that meets the quality standards, and achieve secondary recycling. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art. The present invention proposes a slurry abrasive jet generating system that can screen the used slurry abrasive, recover the qualified abrasive, and thus achieve secondary recycling. This innovative design effectively solves the problem that the abrasive in the prior art cannot be recycled, has significant economic benefits and environmental protection value, and demonstrates its originality, usefulness and uniqueness.

[0004] A slurry abrasive jet generating system includes: a storage tank, a jet peristaltic pump, a nozzle, a collection water tank, and a screening device; the storage tank, the jet peristaltic pump, and the nozzle are connected in sequence through pipelines; the collection water tank is arranged below the nozzle to collect the abrasive slurry ejected by the nozzle; the screening device draws the abrasive slurry from the collection water tank through a pipeline, and after screening and filtering in the screening device, conveys the abrasive slurry to the storage tank; the storage tank is used to store the abrasive slurry for the nozzle to eject the abrasive slurry; the nozzle is used to eject the abrasive slurry to cut an object; the jet peristaltic pump is used to provide power for the nozzle, pressurize the abrasive slurry in the storage tank, and convey it to the nozzle.

[0005] Further, the screening device includes a screening box and a vibration motor; a metal filter screen is arranged in the screening box to filter large particle impurities in the abrasive slurry; the vibration motor is arranged on the upper part of the screening box and is used to vibrate the screening box to prevent the metal filter screen from being blocked.

[0006] Further, the screening box includes an upper box body, an upper rubber pad, a metal filter screen, a lower rubber pad, and a lower box body from top to bottom.

[0007] Further, the jet generating system is also provided with a platform support, the screening box is arranged above the platform support, and a plurality of shock absorption devices are arranged between the screening box and the platform support; the shock absorption devices are pneumatic cylinder shock absorption devices.

[0008] Further, the shock absorption device is a pneumatic cylinder shock absorption device, and the shock absorption device is also provided with a pneumatic control device. The magnitude of the air pressure in the pneumatic cylinder is positively correlated with the magnitude of the current and the magnitude of the vibration amplitude of the vibration motor.

[0009] Further, the screening device further includes a suction device for discharging impurities on the metal filter screen. The suction device includes a suction diaphragm pump, a suction three-way joint, and a suction solenoid valve. The outlet of the suction diaphragm pump is connected to the suction three-way joint. The outlet of the suction three-way joint is communicated with the suction solenoid valve, and the other inlet of the suction three-way joint is communicated with the upper box body.

[0010] Further, the spray head is composed of a connecting pipe, a sand inlet pipe, a sand mixing chamber, a cavity, a gem nozzle, a sand pipe, and a sealing component. The connecting pipe is flange-connected to the high-pressure water pipe as the inlet end, and its central channel guides high-pressure water. The sand inlet pipe is coaxially nested outside the connecting pipe, and abrasive slurry is input into the sand mixing chamber through an annular gap. The side wall of the sand mixing chamber is provided with an inclined jet hole to achieve efficient mixing of water and sand by using turbulence. After the mixed slurry is accelerated by the gem nozzle in the cavity, it is focused and ejected through the conical outlet of the sand pipe. The cavity and the sand mixing chamber are fixed by a compression nut, the gem nozzle is sealed by a compression gasket, and rubber gaskets are provided at each connection to prevent leakage. This design combines the advantages of high-pressure sealing, uniform mixing, and modular maintenance, ensuring jet accuracy and stability.

[0011] Further, the storage tank includes a cover body, a tank body, and a gas supply device. A flow dividing plate is arranged at the lower part of the tank body, and a plurality of small holes are distributed on the flow dividing plate. The shape of the flow dividing plate matches the size of the inner cavity of the tank body. A cavity is formed between the flow dividing plate and the bottom of the tank body. The gas supply device supplies gas into the cavity, so that the abrasive and water are fully mixed in the tank body.

[0012] Further, a screen diaphragm pump is arranged between the lower box body and the storage tank for sucking the abrasive slurry in the screening box into the storage tank.

[0013] A working method of a slurry abrasive jet generation system is as follows:

[0014] S1: The gas supply device supplies gas into the storage tank and enters the inside of the tank body through the flow dividing plate, so that the abrasive and water are evenly mixed.

[0015] S2: Open the high-pressure water supply system of the spray head, start the jet peristaltic pump, supply the abrasive slurry in the storage tank to the spray head, and the spray head mixes the high-pressure water and the abrasive slurry and sprays it out from the nozzle to cut an object.

[0016] S3: Start the vibration pump and the sieve diaphragm pump. After the abrasive slurry is ejected from the nozzle, it is collected in the collection water tank. Due to the suction effect of the sieve diaphragm pump, a negative pressure is formed in the screening box. The liquid in the collection water tank is sucked into the screening box through the pipeline. After being filtered by the screening box, it enters the storage tank under the action of the sieve diaphragm pump.

[0017] S4: After working for a period of time, start the suction diaphragm pump to discharge the impurities in the screening box.

[0018] The technical solution of the present invention has the following advantages:

[0019] This abrasive screening device has remarkable features such as simple structure and convenient operation, and is an efficient abrasive treatment system. Through its circulating screening mechanism, it efficiently reuses the abrasive, greatly improving the utilization rate of the abrasive and thus reducing the waste of the abrasive. This not only reduces the raw material procurement cost of the enterprise but also improves the economic benefits of the production process. In addition, the workbench of this device has been optimized repeatedly, with a reasonable structure, facilitating the daily cleaning and maintenance work of the operators. The workbench surface is made of wear-resistant and corrosion-resistant materials, ensuring stability and durability during long-term use. During daily maintenance, the operators can conveniently clean and replace the abrasive to ensure that the equipment is always in the best working condition. At the same time, different specifications of sieve meshes can be replaced in the screening box to meet the requirements of different application scenarios. During the screening process, a vibration device and a shock absorption device are provided. With the assistance of vibration, the screening box can better complete the screening work, while the shock absorption device is used to mitigate the vibration of the vibration device to ensure the normal operation of the device. At multiple inlets of the screening box, there are switches controlled by solenoid valves to regularly introduce clean water into the screening box to prevent the sieve mesh from being blocked. The design of this device not only extends the service life of the equipment, reduces the maintenance cost, but also improves the continuity and stability of production.

[0020] In addition, the present invention also makes improvements to the existing post-mixed wet abrasive water jet. The existing post-mixed wet abrasive water jet pre-mixes the abrasive and water evenly to obtain an abrasive slurry. The pressurized high-pressure water passes through the high-pressure pipe and then is sent to the mixing chamber through a gem nozzle. At this time, relying only on negative pressure cannot suck the abrasive slurry into the mixing chamber, and it is necessary to use the assistance of a slurry pump to send the abrasive slurry to the mixing chamber to mix with the high-pressure water, and finally form an abrasive water jet through the sand pipe.

[0021] In summary, the use of the abrasive circulating screening device not only effectively improves the production efficiency but also significantly reduces the operating cost. Moreover, due to its excellent design and convenient maintainability, it brings long-term economic and environmental benefits to the enterprise. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the slurry abrasive jet generation system in Embodiment 1;

[0024] Figure 2 It is an exploded structure diagram of the screening box;

[0025] Figure 3 It is a schematic diagram of the injection system;

[0026] Figure 4 It is a schematic diagram of the nozzle structure;

[0027] Figure 5 It is a schematic sectional view of the storage tank;

[0028] Figure 6 It is a schematic diagram of the overall structure of the slurry abrasive jet generation system in Embodiment 2.

[0029] Wherein: 1 - vibration motor, 2 - mounting plate, 3 - water supply solenoid valve, 4 - screening box, 41 - upper box body, 42 - upper rubber pad, 43 - metal filter screen, 44 - lower rubber pad, 45 - lower box body, 5 - screening three-way joint, 6 - water supply three-way joint, 7 - screening solenoid valve, 8 - front rubber shock absorption device, 9 - jet peristaltic pump, 10 - nozzle, 101 - connecting pipe, 102 - gem nozzle, 103 - cavity, 104 - sand mixing chamber, 105 - compression nut, 106 - compression washer, 107 - sand pipe, 108 - sand inlet pipe, 109 rubber washer, 11 - pipeline, 12 - swirl generation device, 13 - collection water tank, 14 - suction diaphragm pump, 15 - screening diaphragm pump, 16 - storage tank, 161 - cover body, 162 - tank body, 163 - flow dividing plate, 17 - pipeline, 18 - platform support, 19 - rear rubber shock absorption pneumatic cylinder shock absorption device, 20 - joint, 21 - suction three-way joint, 22 - suction solenoid valve, 23 - high-pressure water pipe, 24 - front double-stage pneumatic cylinder unit, 25 - rear double-stage pneumatic cylinder unit. Specific embodiments

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Embodiment 1

[0033] As Figures 1-5 , the present application provides the following technical solutions:

[0034] A slurry abrasive jet generating system includes a screening box 4 and a platform bracket 18. A vibration device is provided on the screening box 4. A screening three-way joint 5, a water supply three-way joint 6, and a suction three-way joint 21 are provided above and to the left of the screening box 4. The water supply three-way joint 6 is respectively connected to a screening solenoid valve 3 and a water supply solenoid valve 7. A joint 20 is provided on the right side of the screening box 4. A rubber shock-absorbing device is provided between the screening box 4 and the platform bracket 18. A jet peristaltic pump 9 is provided in front of the screening box 4. A nozzle 10 is provided on the left side of the jet peristaltic pump 9. A collection water tank 13 is provided below the nozzle 10. A suction diaphragm pump 14 and a screening diaphragm pump 15 are provided in front of the platform bracket 18. A storage tank 16 is provided on the right side of the screening diaphragm pump 15.

[0035] As a further solution, the vibration device includes a vibration motor 1 and a mounting plate 2. The vibration motor 1 is fixed to the mounting plate 2, and the mounting plate 2 is fixed to the screening box 4. One end of the pipeline 11 is connected to the screening three-way joint 5, and the other end is placed inside the collection water tank 12. A swirl generating device 12 is installed at the front end of the pipeline 11 inside the collection water tank 13. The inlet of the jet peristaltic pump 9 is connected to the storage tank 16, and the outlet is connected to the nozzle 10. The inlet of the screen diaphragm pump 15 is connected to the suction three-way joint 22, the inlet of the screen diaphragm pump 15 is connected to the joint 20, and the outlet is connected to the storage tank 16. One end of the pipeline 17 is connected to the air compressor, and the other end is fixed to the threaded hole at the center of the flow dividing plate 163. The screening box 4 includes an upper box body 41, an upper rubber pad 42, a metal screen 43, a lower rubber pad 44, and a lower box body 45 from top to bottom. The storage tank 16 includes a cover body 161, an acrylic tank body 162, and a flow dividing plate 163. The shock absorption device includes a front rubber shock absorption device 8 and a rear rubber shock absorption device 19. The height of the front rubber shock absorption device 8 is higher than that of the rear rubber shock absorption device 19. In this way, the screening box 4 will be inclined at a certain angle to facilitate the filtration of abrasives. The circulating conveying device conveys the abrasive slurry in the collection water tank 13 to the storage tank 16 through filtration by the screening box 4, and then further conveys it to the nozzle 10 for cutting an object, and finally enters the collection water tank 13 to complete a cycle. The spraying device includes a nozzle 10, a jet peristaltic pump 9, and a storage tank 16. The storage tank 16 is used to store the screened abrasive slurry, and the abrasive slurry is conveyed to the nozzle 10 by the jet peristaltic pump 9. The suction device extracts impurities that cannot pass through the screen from the screening box 4 through the suction diaphragm pump 14 and the suction three-way joint 21 to prevent the accumulation of impurities from blocking the screen. The water supply device includes a screening solenoid valve 3, a screening three-way joint 5, a water supply solenoid valve 7, and a water supply three-way joint 6, and is used to regularly introduce clean water into the screening box for cleaning the screen to prevent blockage. The swirl generating device 12 starts the swirling process by starting the rotating screening process at the initial stage when the abrasive enters the pipeline, avoiding blockage of the pipeline caused by the accumulation of abrasives in the water tank, thereby preventing the situation where the abrasives cannot be smoothly sucked.

[0036] Working principle: First, after the abrasive cuts the object through the nozzle 10, it enters the collection water tank 13. Then, the screen diaphragm pump 15 is started. Under the action of the cyclone generating device 12, the abrasive slurry in the collection water tank 13 is evenly sucked into the screening box 4 through the pipeline 11. With the assistance of the vibration motor 1, the abrasive grains that meet the particle size requirements pass through the metal screen 43, flow out from the joint 20, and flow into the storage tank 16 through the screen diaphragm pump 15. At the same time, the air compressor passes air into the storage tank 16 through the pipeline 17 and the shunt plate 163, so that the abrasive is evenly mixed with water. Finally, the jet peristaltic pump 9 pumps the abrasive slurry in the storage tank 16 into the nozzle 10 for continuous circulation, realizing the recycling of the abrasive. During the working process, the screening solenoid valve 3 and the water supply solenoid valve 7 are controlled to be opened regularly to introduce clean water to prevent the abrasive from clogging; the suction diaphragm pump 14 is opened regularly to extract the impurities that cannot pass through the metal screen 43 in the screening box 4.

[0037] Embodiment 2

[0038] Based on Embodiment 1, in this embodiment, a pneumatic cylinder shock absorption device is provided, aiming to further optimize the shock absorption performance and dynamic response efficiency of the screening box, and innovative designs are carried out on the structure, control logic and function expansion of the pneumatic cylinder shock absorption device.

[0039] As Figure 6 , the following technical solutions are provided in this application:

[0040] A slurry abrasive jet generating system, whose overall structure is basically the same as that of Embodiment 1. The core difference from Embodiment 1 is that in this embodiment, a pneumatic cylinder shock absorption device is used to replace the original rubber shock absorption device. The specific improvements are as follows:

[0041] The pneumatic cylinder shock absorption device includes two groups of double-stage pneumatic cylinder units arranged symmetrically, which are located on the front and rear sides between the screening box 4 and the platform bracket 18, namely the front-end double-stage pneumatic cylinder unit 24 and the rear-end double-stage pneumatic cylinder unit 25. The front-end double-stage pneumatic cylinder unit 24 and the rear-end double-stage pneumatic cylinder unit 25 are respectively composed of a main pneumatic cylinder and an auxiliary pneumatic cylinder connected in series. The end of the piston rod of the main pneumatic cylinder is connected to the bottom of the screening box 4 through a hinge mechanism. The auxiliary pneumatic cylinder is connected to the air chamber of the main pneumatic cylinder through a flexible bellows to form a linkage air path. A pressure sensor and a displacement sensor are integrated inside the main pneumatic cylinder to monitor the real-time air pressure value and piston displacement of the pneumatic cylinder in real time. In addition, the air pressure control module of the shock absorption device is integrated on the side wall of the platform bracket 18, and a PID controller is built in to dynamically adjust the gas pressure in the pneumatic cylinder.

[0042] Working principle: It is mainly divided into three parts: First, the current signal and vibration amplitude signal of the vibration motor 1 are transmitted to the pneumatic control module CM-1 through signal lines. The PID controller calculates the target air pressure value in real time according to the input signal and adjusts the gas supply amount of the main pneumatic cylinder through the electromagnetic proportional valve, so as to achieve dynamic pressure regulation; Second, when the screening box 4 generates high-frequency impacts due to vibration, the main pneumatic cylinder absorbs the main vibration energy through piston displacement, and the auxiliary pneumatic cylinder further attenuates the residual vibration wave through the expansion and contraction of the flexible bellows, forming a two-stage buffering mechanism to achieve two-stage linkage buffering; Finally, the feedback data of the pressure sensor and displacement sensor are input into the PID controller in real time to form a closed-loop control circuit. When it is detected that the deviation of the inclination angle of the screening box exceeds the preset threshold (for example, ±2°), the system automatically adjusts the air pressure difference between the two pneumatic cylinders to restore the set inclination state of the screening box, ensuring the filtering uniformity and the function of large-guide adaptive adjustment.

[0043] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A slurry abrasive jet generating system, characterized in that, Including: A storage tank, a jet peristaltic pump, a nozzle, a collection water tank, and a screening device; the storage tank, the jet peristaltic pump, and the nozzle are sequentially connected by pipelines; the collection water tank is arranged below the nozzle to collect the abrasive slurry ejected by the nozzle; the screening device sucks the abrasive slurry from the collection water tank through a pipeline, and after screening and filtering in the screening device, conveys the abrasive slurry to the storage tank; the storage tank is used to store the abrasive slurry for the nozzle to eject the abrasive slurry; the nozzle is used to eject the abrasive slurry to cut an object; the jet peristaltic pump is used to provide power for the nozzle, pressurize the abrasive slurry in the storage tank, and convey it to the nozzle.

2. The jet generation system according to claim 1, characterized in that The screening device includes a screening box and a vibration motor; a metal filter screen is arranged in the screening box to filter large particle impurities in the abrasive slurry; the vibration motor is arranged on the upper part of the screening box and is used to vibrate the screening box to prevent the metal filter screen from being blocked.

3. The jet generation system according to claim 2, wherein, The screening box includes an upper box body, an upper rubber pad, a metal filter screen, a lower rubber pad, and a lower box body from top to bottom.

4. The jet generation system according to claim 2, characterized in that, The jet generating system is further provided with a platform support, the screening box is arranged above the platform support, and a plurality of shock absorption devices are arranged between the screening box and the platform support; the shock absorption devices are rubber shock absorption devices.

5. The jet generation system according to claim 2, wherein The shock absorption device is a pneumatic cylinder shock absorption device, and the shock absorption device is further provided with a pneumatic control device, and the air pressure in the pneumatic cylinder is positively correlated with the current magnitude and vibration amplitude magnitude of the vibration motor.

6. The jet generation system according to claim 3, characterized in that, The screening device further includes a suction device, and the suction device is used to discharge impurities on the metal filter screen; the suction device includes a suction diaphragm pump, a suction three-way joint, and a suction solenoid valve; the outlet of the suction diaphragm pump is connected to the suction three-way joint, the outlet of the suction three-way joint is communicated with the suction solenoid valve, and the other inlet of the suction three-way joint is communicated with the upper box body.

7. The jet generation system according to claim 1, characterized in that, The nozzle is composed of a connecting pipe, a sand inlet pipe, a sand mixing chamber, a cavity, a gem nozzle, a sand pipe, and a sealing component; the connecting pipe is used as an inlet end and is flange-connected to a high-pressure water pipe, and its central channel conducts high-pressure water; the sand inlet pipe is coaxially nested outside the connecting pipe, and the abrasive slurry is input into the sand mixing chamber 104 through an annular gap; the side wall of the sand mixing chamber is provided with obliquely jetting holes, and high-efficiency mixing of water and sand is realized by using turbulence; the mixed slurry is accelerated by the gem nozzle in the cavity and is focused and ejected through the conical outlet of the sand pipe.

8. The jet generation system according to claim 1, characterized in that The storage tank includes a cover body, a tank body, and a gas supply device; a flow dividing plate is arranged at the lower part of the tank body, and a plurality of small holes are distributed on the flow dividing plate. The shape of the flow dividing plate matches the size of the inner cavity of the tank body. A cavity is formed between the flow dividing plate and the bottom of the tank body, and the gas supply device supplies gas to the cavity, so that the abrasive and water are fully mixed in the tank body.

9. The jet generation system according to claim 1, wherein A screening diaphragm pump is arranged between the lower box body and the storage tank and is used to suck the abrasive slurry in the screening box into the storage tank.

10. The working method of a slurry abrasive jet generating system is as follows: S1: The gas supply device supplies gas into the storage tank and enters the inside of the tank body through the flow dividing plate, so that the abrasive and water are evenly mixed; S2: Open the high-pressure water supply system of the nozzle, start the jet peristaltic pump, supply the abrasive slurry in the storage tank to the nozzle, and the nozzle mixes the high-pressure water and the abrasive slurry and sprays it out from the nozzle to cut an object; S3: Start the vibration pump and the sieve diaphragm pump. After the abrasive slurry is ejected from the nozzle, it is collected in the collection water tank. Due to the suction effect of the sieve diaphragm pump, a negative pressure is formed in the screening box. The liquid in the collection water tank is sucked into the screening box through the pipeline. After being filtered by the screening box, it enters the storage tank under the action of the sieve diaphragm pump; S4: After working for a period of time, start the suction diaphragm pump to discharge the impurities in the screening box.

Images